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-rw-r--r--src/Makefile.am42
-rw-r--r--src/Makefile.in696
-rw-r--r--src/common/common_w32res.rc52
-rw-r--r--src/common/mythread.h528
-rw-r--r--src/common/sysdefs.h197
-rw-r--r--src/common/tuklib_common.h71
-rw-r--r--src/common/tuklib_config.h10
-rw-r--r--src/common/tuklib_cpucores.c109
-rw-r--r--src/common/tuklib_cpucores.h23
-rw-r--r--src/common/tuklib_exit.c58
-rw-r--r--src/common/tuklib_exit.h25
-rw-r--r--src/common/tuklib_gettext.h44
-rw-r--r--src/common/tuklib_integer.h946
-rw-r--r--src/common/tuklib_mbstr.h66
-rw-r--r--src/common/tuklib_mbstr_fw.c31
-rw-r--r--src/common/tuklib_mbstr_width.c65
-rw-r--r--src/common/tuklib_open_stdxxx.c57
-rw-r--r--src/common/tuklib_open_stdxxx.h23
-rw-r--r--src/common/tuklib_physmem.c234
-rw-r--r--src/common/tuklib_physmem.h28
-rw-r--r--src/common/tuklib_progname.c50
-rw-r--r--src/common/tuklib_progname.h32
-rw-r--r--src/liblzma/Makefile.am130
-rw-r--r--src/liblzma/Makefile.in2236
-rw-r--r--src/liblzma/api/Makefile.am23
-rw-r--r--src/liblzma/api/Makefile.in630
-rw-r--r--src/liblzma/api/lzma.h328
-rw-r--r--src/liblzma/api/lzma/base.h748
-rw-r--r--src/liblzma/api/lzma/bcj.h94
-rw-r--r--src/liblzma/api/lzma/block.h695
-rw-r--r--src/liblzma/api/lzma/check.h164
-rw-r--r--src/liblzma/api/lzma/container.h968
-rw-r--r--src/liblzma/api/lzma/delta.h96
-rw-r--r--src/liblzma/api/lzma/filter.h770
-rw-r--r--src/liblzma/api/lzma/hardware.h63
-rw-r--r--src/liblzma/api/lzma/index.h860
-rw-r--r--src/liblzma/api/lzma/index_hash.h124
-rw-r--r--src/liblzma/api/lzma/lzma12.h569
-rw-r--r--src/liblzma/api/lzma/stream_flags.h266
-rw-r--r--src/liblzma/api/lzma/version.h135
-rw-r--r--src/liblzma/api/lzma/vli.h168
-rw-r--r--src/liblzma/check/Makefile.inc53
-rw-r--r--src/liblzma/check/check.c174
-rw-r--r--src/liblzma/check/check.h175
-rw-r--r--src/liblzma/check/crc32_fast.c82
-rw-r--r--src/liblzma/check/crc32_small.c68
-rw-r--r--src/liblzma/check/crc32_table.c22
-rw-r--r--src/liblzma/check/crc32_table_be.h525
-rw-r--r--src/liblzma/check/crc32_table_le.h525
-rw-r--r--src/liblzma/check/crc32_tablegen.c117
-rw-r--r--src/liblzma/check/crc32_x86.S313
-rw-r--r--src/liblzma/check/crc64_fast.c538
-rw-r--r--src/liblzma/check/crc64_small.c58
-rw-r--r--src/liblzma/check/crc64_table.c33
-rw-r--r--src/liblzma/check/crc64_table_be.h521
-rw-r--r--src/liblzma/check/crc64_table_le.h521
-rw-r--r--src/liblzma/check/crc64_tablegen.c88
-rw-r--r--src/liblzma/check/crc64_x86.S296
-rw-r--r--src/liblzma/check/crc_macros.h30
-rw-r--r--src/liblzma/check/sha256.c196
-rw-r--r--src/liblzma/common/Makefile.inc104
-rw-r--r--src/liblzma/common/alone_decoder.c249
-rw-r--r--src/liblzma/common/alone_decoder.h23
-rw-r--r--src/liblzma/common/alone_encoder.c152
-rw-r--r--src/liblzma/common/auto_decoder.c206
-rw-r--r--src/liblzma/common/block_buffer_decoder.c80
-rw-r--r--src/liblzma/common/block_buffer_encoder.c355
-rw-r--r--src/liblzma/common/block_buffer_encoder.h24
-rw-r--r--src/liblzma/common/block_decoder.c289
-rw-r--r--src/liblzma/common/block_decoder.h22
-rw-r--r--src/liblzma/common/block_encoder.c227
-rw-r--r--src/liblzma/common/block_encoder.h47
-rw-r--r--src/liblzma/common/block_header_decoder.c115
-rw-r--r--src/liblzma/common/block_header_encoder.c132
-rw-r--r--src/liblzma/common/block_util.c90
-rw-r--r--src/liblzma/common/common.c481
-rw-r--r--src/liblzma/common/common.h413
-rw-r--r--src/liblzma/common/easy_buffer_encoder.c27
-rw-r--r--src/liblzma/common/easy_decoder_memusage.c24
-rw-r--r--src/liblzma/common/easy_encoder.c24
-rw-r--r--src/liblzma/common/easy_encoder_memusage.c24
-rw-r--r--src/liblzma/common/easy_preset.c27
-rw-r--r--src/liblzma/common/easy_preset.h32
-rw-r--r--src/liblzma/common/file_info.c855
-rw-r--r--src/liblzma/common/filter_buffer_decoder.c88
-rw-r--r--src/liblzma/common/filter_buffer_encoder.c55
-rw-r--r--src/liblzma/common/filter_common.c385
-rw-r--r--src/liblzma/common/filter_common.h51
-rw-r--r--src/liblzma/common/filter_decoder.c198
-rw-r--r--src/liblzma/common/filter_decoder.h23
-rw-r--r--src/liblzma/common/filter_encoder.c308
-rw-r--r--src/liblzma/common/filter_encoder.h27
-rw-r--r--src/liblzma/common/filter_flags_decoder.c46
-rw-r--r--src/liblzma/common/filter_flags_encoder.c56
-rw-r--r--src/liblzma/common/hardware_cputhreads.c34
-rw-r--r--src/liblzma/common/hardware_physmem.c25
-rw-r--r--src/liblzma/common/index.c1269
-rw-r--r--src/liblzma/common/index.h81
-rw-r--r--src/liblzma/common/index_decoder.c362
-rw-r--r--src/liblzma/common/index_decoder.h25
-rw-r--r--src/liblzma/common/index_encoder.c263
-rw-r--r--src/liblzma/common/index_encoder.h23
-rw-r--r--src/liblzma/common/index_hash.c343
-rw-r--r--src/liblzma/common/lzip_decoder.c418
-rw-r--r--src/liblzma/common/lzip_decoder.h22
-rw-r--r--src/liblzma/common/memcmplen.h173
-rw-r--r--src/liblzma/common/microlzma_decoder.c221
-rw-r--r--src/liblzma/common/microlzma_encoder.c141
-rw-r--r--src/liblzma/common/outqueue.c287
-rw-r--r--src/liblzma/common/outqueue.h254
-rw-r--r--src/liblzma/common/stream_buffer_decoder.c91
-rw-r--r--src/liblzma/common/stream_buffer_encoder.c142
-rw-r--r--src/liblzma/common/stream_decoder.c474
-rw-r--r--src/liblzma/common/stream_decoder.h22
-rw-r--r--src/liblzma/common/stream_decoder_mt.c2018
-rw-r--r--src/liblzma/common/stream_encoder.c355
-rw-r--r--src/liblzma/common/stream_encoder_mt.c1283
-rw-r--r--src/liblzma/common/stream_flags_common.c47
-rw-r--r--src/liblzma/common/stream_flags_common.h36
-rw-r--r--src/liblzma/common/stream_flags_decoder.c88
-rw-r--r--src/liblzma/common/stream_flags_encoder.c86
-rw-r--r--src/liblzma/common/string_conversion.c1324
-rw-r--r--src/liblzma/common/vli_decoder.c86
-rw-r--r--src/liblzma/common/vli_encoder.c69
-rw-r--r--src/liblzma/common/vli_size.c30
-rw-r--r--src/liblzma/delta/Makefile.inc23
-rw-r--r--src/liblzma/delta/delta_common.c73
-rw-r--r--src/liblzma/delta/delta_common.h20
-rw-r--r--src/liblzma/delta/delta_decoder.c83
-rw-r--r--src/liblzma/delta/delta_decoder.h26
-rw-r--r--src/liblzma/delta/delta_encoder.c133
-rw-r--r--src/liblzma/delta/delta_encoder.h24
-rw-r--r--src/liblzma/delta/delta_private.h37
-rw-r--r--src/liblzma/liblzma.pc.in20
-rw-r--r--src/liblzma/liblzma_generic.map121
-rw-r--r--src/liblzma/liblzma_linux.map136
-rw-r--r--src/liblzma/liblzma_w32res.rc12
-rw-r--r--src/liblzma/lz/Makefile.inc22
-rw-r--r--src/liblzma/lz/lz_decoder.c304
-rw-r--r--src/liblzma/lz/lz_decoder.h234
-rw-r--r--src/liblzma/lz/lz_encoder.c633
-rw-r--r--src/liblzma/lz/lz_encoder.h341
-rw-r--r--src/liblzma/lz/lz_encoder_hash.h109
-rw-r--r--src/liblzma/lz/lz_encoder_hash_table.h68
-rw-r--r--src/liblzma/lz/lz_encoder_mf.c745
-rw-r--r--src/liblzma/lzma/Makefile.inc44
-rw-r--r--src/liblzma/lzma/fastpos.h142
-rw-r--r--src/liblzma/lzma/fastpos_table.c519
-rw-r--r--src/liblzma/lzma/fastpos_tablegen.c57
-rw-r--r--src/liblzma/lzma/lzma2_decoder.c311
-rw-r--r--src/liblzma/lzma/lzma2_decoder.h29
-rw-r--r--src/liblzma/lzma/lzma2_encoder.c414
-rw-r--r--src/liblzma/lzma/lzma2_encoder.h43
-rw-r--r--src/liblzma/lzma/lzma_common.h225
-rw-r--r--src/liblzma/lzma/lzma_decoder.c1133
-rw-r--r--src/liblzma/lzma/lzma_decoder.h53
-rw-r--r--src/liblzma/lzma/lzma_encoder.c784
-rw-r--r--src/liblzma/lzma/lzma_encoder.h59
-rw-r--r--src/liblzma/lzma/lzma_encoder_optimum_fast.c170
-rw-r--r--src/liblzma/lzma/lzma_encoder_optimum_normal.c859
-rw-r--r--src/liblzma/lzma/lzma_encoder_presets.c64
-rw-r--r--src/liblzma/lzma/lzma_encoder_private.h162
-rw-r--r--src/liblzma/rangecoder/Makefile.inc21
-rw-r--r--src/liblzma/rangecoder/price.h93
-rw-r--r--src/liblzma/rangecoder/price_table.c22
-rw-r--r--src/liblzma/rangecoder/price_tablegen.c87
-rw-r--r--src/liblzma/rangecoder/range_common.h71
-rw-r--r--src/liblzma/rangecoder/range_decoder.h185
-rw-r--r--src/liblzma/rangecoder/range_encoder.h350
-rw-r--r--src/liblzma/simple/Makefile.inc51
-rw-r--r--src/liblzma/simple/arm.c75
-rw-r--r--src/liblzma/simple/arm64.c137
-rw-r--r--src/liblzma/simple/armthumb.c80
-rw-r--r--src/liblzma/simple/ia64.c116
-rw-r--r--src/liblzma/simple/powerpc.c80
-rw-r--r--src/liblzma/simple/simple_coder.c292
-rw-r--r--src/liblzma/simple/simple_coder.h81
-rw-r--r--src/liblzma/simple/simple_decoder.c40
-rw-r--r--src/liblzma/simple/simple_decoder.h22
-rw-r--r--src/liblzma/simple/simple_encoder.c38
-rw-r--r--src/liblzma/simple/simple_encoder.h23
-rw-r--r--src/liblzma/simple/simple_private.h74
-rw-r--r--src/liblzma/simple/sparc.c87
-rw-r--r--src/liblzma/simple/x86.c163
-rw-r--r--src/liblzma/validate_map.sh165
-rw-r--r--src/lzmainfo/Makefile.am39
-rw-r--r--src/lzmainfo/Makefile.in837
-rw-r--r--src/lzmainfo/lzmainfo.160
-rw-r--r--src/lzmainfo/lzmainfo.c221
-rw-r--r--src/lzmainfo/lzmainfo_w32res.rc12
-rw-r--r--src/scripts/Makefile.am89
-rw-r--r--src/scripts/Makefile.in700
-rw-r--r--src/scripts/xzdiff.179
-rw-r--r--src/scripts/xzdiff.in215
-rw-r--r--src/scripts/xzgrep.1113
-rw-r--r--src/scripts/xzgrep.in298
-rw-r--r--src/scripts/xzless.169
-rw-r--r--src/scripts/xzless.in59
-rw-r--r--src/scripts/xzmore.155
-rw-r--r--src/scripts/xzmore.in79
-rw-r--r--src/xz/Makefile.am133
-rw-r--r--src/xz/Makefile.in1162
-rw-r--r--src/xz/args.c763
-rw-r--r--src/xz/args.h44
-rw-r--r--src/xz/coder.c1109
-rw-r--r--src/xz/coder.h79
-rw-r--r--src/xz/file_io.c1403
-rw-r--r--src/xz/file_io.h179
-rw-r--r--src/xz/hardware.c338
-rw-r--r--src/xz/hardware.h75
-rw-r--r--src/xz/list.c1318
-rw-r--r--src/xz/list.h18
-rw-r--r--src/xz/main.c344
-rw-r--r--src/xz/main.h30
-rw-r--r--src/xz/message.c1146
-rw-r--r--src/xz/message.h156
-rw-r--r--src/xz/mytime.c86
-rw-r--r--src/xz/mytime.h43
-rw-r--r--src/xz/options.c359
-rw-r--r--src/xz/options.h31
-rw-r--r--src/xz/private.h66
-rw-r--r--src/xz/signals.c209
-rw-r--r--src/xz/signals.h43
-rw-r--r--src/xz/suffix.c401
-rw-r--r--src/xz/suffix.h36
-rw-r--r--src/xz/util.c287
-rw-r--r--src/xz/util.h119
-rw-r--r--src/xz/xz.13020
-rw-r--r--src/xz/xz_w32res.rc12
-rw-r--r--src/xzdec/Makefile.am111
-rw-r--r--src/xzdec/Makefile.in969
-rw-r--r--src/xzdec/lzmadec_w32res.rc12
-rw-r--r--src/xzdec/xzdec.1146
-rw-r--r--src/xzdec/xzdec.c326
-rw-r--r--src/xzdec/xzdec_w32res.rc12
235 files changed, 60235 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..d199e85
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,42 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+SUBDIRS = liblzma xzdec
+
+if COND_XZ
+SUBDIRS += xz
+endif
+
+if COND_LZMAINFO
+SUBDIRS += lzmainfo
+endif
+
+if COND_SCRIPTS
+SUBDIRS += scripts
+endif
+
+EXTRA_DIST = \
+ common/common_w32res.rc \
+ common/mythread.h \
+ common/sysdefs.h \
+ common/tuklib_common.h \
+ common/tuklib_config.h \
+ common/tuklib_cpucores.c \
+ common/tuklib_cpucores.h \
+ common/tuklib_exit.c \
+ common/tuklib_exit.h \
+ common/tuklib_gettext.h \
+ common/tuklib_integer.h \
+ common/tuklib_mbstr_fw.c \
+ common/tuklib_mbstr.h \
+ common/tuklib_mbstr_width.c \
+ common/tuklib_open_stdxxx.c \
+ common/tuklib_open_stdxxx.h \
+ common/tuklib_physmem.c \
+ common/tuklib_physmem.h \
+ common/tuklib_progname.c \
+ common/tuklib_progname.h
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..d9827e9
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,696 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
+ true; \
+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+ true; \
+ else \
+ false; \
+ fi; \
+}
+am__make_running_with_option = \
+ case $${target_option-} in \
+ ?) ;; \
+ *) echo "am__make_running_with_option: internal error: invalid" \
+ "target option '$${target_option-}' specified" >&2; \
+ exit 1;; \
+ esac; \
+ has_opt=no; \
+ sane_makeflags=$$MAKEFLAGS; \
+ if $(am__is_gnu_make); then \
+ sane_makeflags=$$MFLAGS; \
+ else \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ bs=\\; \
+ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
+ esac; \
+ fi; \
+ skip_next=no; \
+ strip_trailopt () \
+ { \
+ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+ }; \
+ for flg in $$sane_makeflags; do \
+ test $$skip_next = yes && { skip_next=no; continue; }; \
+ case $$flg in \
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+ -*I?*) strip_trailopt 'I';; \
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+ -*O?*) strip_trailopt 'O';; \
+ -*l) strip_trailopt 'l'; skip_next=yes;; \
+ -*l?*) strip_trailopt 'l';; \
+ -[dEDm]) skip_next=yes;; \
+ -[JT]) skip_next=yes;; \
+ esac; \
+ case $$flg in \
+ *$$target_option*) has_opt=yes; break;; \
+ esac; \
+ done; \
+ test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+@COND_XZ_TRUE@am__append_1 = xz
+@COND_LZMAINFO_TRUE@am__append_2 = lzmainfo
+@COND_SCRIPTS_TRUE@am__append_3 = scripts
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+ $(top_srcdir)/m4/gettext.m4 $(top_srcdir)/m4/host-cpu-c-abi.m4 \
+ $(top_srcdir)/m4/iconv.m4 $(top_srcdir)/m4/intlmacosx.m4 \
+ $(top_srcdir)/m4/lib-ld.m4 $(top_srcdir)/m4/lib-link.m4 \
+ $(top_srcdir)/m4/lib-prefix.m4 $(top_srcdir)/m4/libtool.m4 \
+ $(top_srcdir)/m4/ltoptions.m4 $(top_srcdir)/m4/ltsugar.m4 \
+ $(top_srcdir)/m4/ltversion.m4 $(top_srcdir)/m4/lt~obsolete.m4 \
+ $(top_srcdir)/m4/nls.m4 $(top_srcdir)/m4/po.m4 \
+ $(top_srcdir)/m4/posix-shell.m4 $(top_srcdir)/m4/progtest.m4 \
+ $(top_srcdir)/m4/tuklib_common.m4 \
+ $(top_srcdir)/m4/tuklib_cpucores.m4 \
+ $(top_srcdir)/m4/tuklib_integer.m4 \
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+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
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+ common/tuklib_open_stdxxx.h \
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diff --git a/src/common/common_w32res.rc b/src/common/common_w32res.rc
new file mode 100644
index 0000000..d05d22e
--- /dev/null
+++ b/src/common/common_w32res.rc
@@ -0,0 +1,52 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#include <winresrc.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#define LZMA_H_INTERNAL
+#define LZMA_H_INTERNAL_RC
+#include "lzma/version.h"
+
+#ifndef MY_BUILD
+# define MY_BUILD 0
+#endif
+#define MY_VERSION LZMA_VERSION_MAJOR,LZMA_VERSION_MINOR,LZMA_VERSION_PATCH,MY_BUILD
+
+#define MY_FILENAME MY_NAME MY_SUFFIX
+#define MY_COMPANY "The Tukaani Project <https://tukaani.org/>"
+#define MY_PRODUCT PACKAGE_NAME " <" PACKAGE_URL ">"
+
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION MY_VERSION
+ PRODUCTVERSION MY_VERSION
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+ FILEFLAGS 0
+ FILEOS VOS_NT_WINDOWS32
+ FILETYPE MY_TYPE
+ FILESUBTYPE 0x0L
+BEGIN
+ BLOCK "StringFileInfo"
+ BEGIN
+ BLOCK "040904b0"
+ BEGIN
+ VALUE "CompanyName", MY_COMPANY
+ VALUE "FileDescription", MY_DESC
+ VALUE "FileVersion", LZMA_VERSION_STRING
+ VALUE "InternalName", MY_NAME
+ VALUE "OriginalFilename", MY_FILENAME
+ VALUE "ProductName", MY_PRODUCT
+ VALUE "ProductVersion", LZMA_VERSION_STRING
+ END
+ END
+ BLOCK "VarFileInfo"
+ BEGIN
+ VALUE "Translation", 0x409, 1200
+ END
+END
diff --git a/src/common/mythread.h b/src/common/mythread.h
new file mode 100644
index 0000000..4495e01
--- /dev/null
+++ b/src/common/mythread.h
@@ -0,0 +1,528 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file mythread.h
+/// \brief Some threading related helper macros and functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef MYTHREAD_H
+#define MYTHREAD_H
+
+#include "sysdefs.h"
+
+// If any type of threading is enabled, #define MYTHREAD_ENABLED.
+#if defined(MYTHREAD_POSIX) || defined(MYTHREAD_WIN95) \
+ || defined(MYTHREAD_VISTA)
+# define MYTHREAD_ENABLED 1
+#endif
+
+
+#ifdef MYTHREAD_ENABLED
+
+////////////////////////////////////////
+// Shared between all threading types //
+////////////////////////////////////////
+
+// Locks a mutex for a duration of a block.
+//
+// Perform mythread_mutex_lock(&mutex) in the beginning of a block
+// and mythread_mutex_unlock(&mutex) at the end of the block. "break"
+// may be used to unlock the mutex and jump out of the block.
+// mythread_sync blocks may be nested.
+//
+// Example:
+//
+// mythread_sync(mutex) {
+// foo();
+// if (some_error)
+// break; // Skips bar()
+// bar();
+// }
+//
+// At least GCC optimizes the loops completely away so it doesn't slow
+// things down at all compared to plain mythread_mutex_lock(&mutex)
+// and mythread_mutex_unlock(&mutex) calls.
+//
+#define mythread_sync(mutex) mythread_sync_helper1(mutex, __LINE__)
+#define mythread_sync_helper1(mutex, line) mythread_sync_helper2(mutex, line)
+#define mythread_sync_helper2(mutex, line) \
+ for (unsigned int mythread_i_ ## line = 0; \
+ mythread_i_ ## line \
+ ? (mythread_mutex_unlock(&(mutex)), 0) \
+ : (mythread_mutex_lock(&(mutex)), 1); \
+ mythread_i_ ## line = 1) \
+ for (unsigned int mythread_j_ ## line = 0; \
+ !mythread_j_ ## line; \
+ mythread_j_ ## line = 1)
+#endif
+
+
+#if !defined(MYTHREAD_ENABLED)
+
+//////////////////
+// No threading //
+//////////////////
+
+// Calls the given function once. This isn't thread safe.
+#define mythread_once(func) \
+do { \
+ static bool once_ = false; \
+ if (!once_) { \
+ func(); \
+ once_ = true; \
+ } \
+} while (0)
+
+
+#if !(defined(_WIN32) && !defined(__CYGWIN__)) && !defined(__wasm__)
+// Use sigprocmask() to set the signal mask in single-threaded programs.
+#include <signal.h>
+
+static inline void
+mythread_sigmask(int how, const sigset_t *restrict set,
+ sigset_t *restrict oset)
+{
+ int ret = sigprocmask(how, set, oset);
+ assert(ret == 0);
+ (void)ret;
+}
+#endif
+
+
+#elif defined(MYTHREAD_POSIX)
+
+////////////////////
+// Using pthreads //
+////////////////////
+
+#include <pthread.h>
+#include <signal.h>
+#include <time.h>
+#include <errno.h>
+
+// If clock_gettime() isn't available, use gettimeofday() from <sys/time.h>
+// as a fallback. gettimeofday() is in SUSv2 and thus is supported on all
+// relevant POSIX systems.
+#ifndef HAVE_CLOCK_GETTIME
+# include <sys/time.h>
+#endif
+
+#define MYTHREAD_RET_TYPE void *
+#define MYTHREAD_RET_VALUE NULL
+
+typedef pthread_t mythread;
+typedef pthread_mutex_t mythread_mutex;
+
+typedef struct {
+ pthread_cond_t cond;
+#ifdef HAVE_CLOCK_GETTIME
+ // Clock ID (CLOCK_REALTIME or CLOCK_MONOTONIC) associated with
+ // the condition variable.
+ clockid_t clk_id;
+#endif
+} mythread_cond;
+
+typedef struct timespec mythread_condtime;
+
+
+// Calls the given function once in a thread-safe way.
+#define mythread_once(func) \
+ do { \
+ static pthread_once_t once_ = PTHREAD_ONCE_INIT; \
+ pthread_once(&once_, &func); \
+ } while (0)
+
+
+// Use pthread_sigmask() to set the signal mask in multi-threaded programs.
+// Do nothing on OpenVMS since it lacks pthread_sigmask().
+static inline void
+mythread_sigmask(int how, const sigset_t *restrict set,
+ sigset_t *restrict oset)
+{
+#ifdef __VMS
+ (void)how;
+ (void)set;
+ (void)oset;
+#else
+ int ret = pthread_sigmask(how, set, oset);
+ assert(ret == 0);
+ (void)ret;
+#endif
+}
+
+
+// Creates a new thread with all signals blocked. Returns zero on success
+// and non-zero on error.
+static inline int
+mythread_create(mythread *thread, void *(*func)(void *arg), void *arg)
+{
+ sigset_t old;
+ sigset_t all;
+ sigfillset(&all);
+
+ mythread_sigmask(SIG_SETMASK, &all, &old);
+ const int ret = pthread_create(thread, NULL, func, arg);
+ mythread_sigmask(SIG_SETMASK, &old, NULL);
+
+ return ret;
+}
+
+// Joins a thread. Returns zero on success and non-zero on error.
+static inline int
+mythread_join(mythread thread)
+{
+ return pthread_join(thread, NULL);
+}
+
+
+// Initiatlizes a mutex. Returns zero on success and non-zero on error.
+static inline int
+mythread_mutex_init(mythread_mutex *mutex)
+{
+ return pthread_mutex_init(mutex, NULL);
+}
+
+static inline void
+mythread_mutex_destroy(mythread_mutex *mutex)
+{
+ int ret = pthread_mutex_destroy(mutex);
+ assert(ret == 0);
+ (void)ret;
+}
+
+static inline void
+mythread_mutex_lock(mythread_mutex *mutex)
+{
+ int ret = pthread_mutex_lock(mutex);
+ assert(ret == 0);
+ (void)ret;
+}
+
+static inline void
+mythread_mutex_unlock(mythread_mutex *mutex)
+{
+ int ret = pthread_mutex_unlock(mutex);
+ assert(ret == 0);
+ (void)ret;
+}
+
+
+// Initializes a condition variable.
+//
+// Using CLOCK_MONOTONIC instead of the default CLOCK_REALTIME makes the
+// timeout in pthread_cond_timedwait() work correctly also if system time
+// is suddenly changed. Unfortunately CLOCK_MONOTONIC isn't available
+// everywhere while the default CLOCK_REALTIME is, so the default is
+// used if CLOCK_MONOTONIC isn't available.
+//
+// If clock_gettime() isn't available at all, gettimeofday() will be used.
+static inline int
+mythread_cond_init(mythread_cond *mycond)
+{
+#ifdef HAVE_CLOCK_GETTIME
+# if defined(HAVE_PTHREAD_CONDATTR_SETCLOCK) && \
+ defined(HAVE_CLOCK_MONOTONIC)
+ struct timespec ts;
+ pthread_condattr_t condattr;
+
+ // POSIX doesn't seem to *require* that pthread_condattr_setclock()
+ // will fail if given an unsupported clock ID. Test that
+ // CLOCK_MONOTONIC really is supported using clock_gettime().
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0
+ && pthread_condattr_init(&condattr) == 0) {
+ int ret = pthread_condattr_setclock(
+ &condattr, CLOCK_MONOTONIC);
+ if (ret == 0)
+ ret = pthread_cond_init(&mycond->cond, &condattr);
+
+ pthread_condattr_destroy(&condattr);
+
+ if (ret == 0) {
+ mycond->clk_id = CLOCK_MONOTONIC;
+ return 0;
+ }
+ }
+
+ // If anything above fails, fall back to the default CLOCK_REALTIME.
+ // POSIX requires that all implementations of clock_gettime() must
+ // support at least CLOCK_REALTIME.
+# endif
+
+ mycond->clk_id = CLOCK_REALTIME;
+#endif
+
+ return pthread_cond_init(&mycond->cond, NULL);
+}
+
+static inline void
+mythread_cond_destroy(mythread_cond *cond)
+{
+ int ret = pthread_cond_destroy(&cond->cond);
+ assert(ret == 0);
+ (void)ret;
+}
+
+static inline void
+mythread_cond_signal(mythread_cond *cond)
+{
+ int ret = pthread_cond_signal(&cond->cond);
+ assert(ret == 0);
+ (void)ret;
+}
+
+static inline void
+mythread_cond_wait(mythread_cond *cond, mythread_mutex *mutex)
+{
+ int ret = pthread_cond_wait(&cond->cond, mutex);
+ assert(ret == 0);
+ (void)ret;
+}
+
+// Waits on a condition or until a timeout expires. If the timeout expires,
+// non-zero is returned, otherwise zero is returned.
+static inline int
+mythread_cond_timedwait(mythread_cond *cond, mythread_mutex *mutex,
+ const mythread_condtime *condtime)
+{
+ int ret = pthread_cond_timedwait(&cond->cond, mutex, condtime);
+ assert(ret == 0 || ret == ETIMEDOUT);
+ return ret;
+}
+
+// Sets condtime to the absolute time that is timeout_ms milliseconds
+// in the future. The type of the clock to use is taken from cond.
+static inline void
+mythread_condtime_set(mythread_condtime *condtime, const mythread_cond *cond,
+ uint32_t timeout_ms)
+{
+ condtime->tv_sec = (time_t)(timeout_ms / 1000);
+ condtime->tv_nsec = (long)((timeout_ms % 1000) * 1000000);
+
+#ifdef HAVE_CLOCK_GETTIME
+ struct timespec now;
+ int ret = clock_gettime(cond->clk_id, &now);
+ assert(ret == 0);
+ (void)ret;
+
+ condtime->tv_sec += now.tv_sec;
+ condtime->tv_nsec += now.tv_nsec;
+#else
+ (void)cond;
+
+ struct timeval now;
+ gettimeofday(&now, NULL);
+
+ condtime->tv_sec += now.tv_sec;
+ condtime->tv_nsec += now.tv_usec * 1000L;
+#endif
+
+ // tv_nsec must stay in the range [0, 999_999_999].
+ if (condtime->tv_nsec >= 1000000000L) {
+ condtime->tv_nsec -= 1000000000L;
+ ++condtime->tv_sec;
+ }
+}
+
+
+#elif defined(MYTHREAD_WIN95) || defined(MYTHREAD_VISTA)
+
+/////////////////////
+// Windows threads //
+/////////////////////
+
+#define WIN32_LEAN_AND_MEAN
+#ifdef MYTHREAD_VISTA
+# undef _WIN32_WINNT
+# define _WIN32_WINNT 0x0600
+#endif
+#include <windows.h>
+#include <process.h>
+
+#define MYTHREAD_RET_TYPE unsigned int __stdcall
+#define MYTHREAD_RET_VALUE 0
+
+typedef HANDLE mythread;
+typedef CRITICAL_SECTION mythread_mutex;
+
+#ifdef MYTHREAD_WIN95
+typedef HANDLE mythread_cond;
+#else
+typedef CONDITION_VARIABLE mythread_cond;
+#endif
+
+typedef struct {
+ // Tick count (milliseconds) in the beginning of the timeout.
+ // NOTE: This is 32 bits so it wraps around after 49.7 days.
+ // Multi-day timeouts may not work as expected.
+ DWORD start;
+
+ // Length of the timeout in milliseconds. The timeout expires
+ // when the current tick count minus "start" is equal or greater
+ // than "timeout".
+ DWORD timeout;
+} mythread_condtime;
+
+
+// mythread_once() is only available with Vista threads.
+#ifdef MYTHREAD_VISTA
+#define mythread_once(func) \
+ do { \
+ static INIT_ONCE once_ = INIT_ONCE_STATIC_INIT; \
+ BOOL pending_; \
+ if (!InitOnceBeginInitialize(&once_, 0, &pending_, NULL)) \
+ abort(); \
+ if (pending_) { \
+ func(); \
+ if (!InitOnceComplete(&once_, 0, NULL)) \
+ abort(); \
+ } \
+ } while (0)
+#endif
+
+
+// mythread_sigmask() isn't available on Windows. Even a dummy version would
+// make no sense because the other POSIX signal functions are missing anyway.
+
+
+static inline int
+mythread_create(mythread *thread,
+ unsigned int (__stdcall *func)(void *arg), void *arg)
+{
+ uintptr_t ret = _beginthreadex(NULL, 0, func, arg, 0, NULL);
+ if (ret == 0)
+ return -1;
+
+ *thread = (HANDLE)ret;
+ return 0;
+}
+
+static inline int
+mythread_join(mythread thread)
+{
+ int ret = 0;
+
+ if (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0)
+ ret = -1;
+
+ if (!CloseHandle(thread))
+ ret = -1;
+
+ return ret;
+}
+
+
+static inline int
+mythread_mutex_init(mythread_mutex *mutex)
+{
+ InitializeCriticalSection(mutex);
+ return 0;
+}
+
+static inline void
+mythread_mutex_destroy(mythread_mutex *mutex)
+{
+ DeleteCriticalSection(mutex);
+}
+
+static inline void
+mythread_mutex_lock(mythread_mutex *mutex)
+{
+ EnterCriticalSection(mutex);
+}
+
+static inline void
+mythread_mutex_unlock(mythread_mutex *mutex)
+{
+ LeaveCriticalSection(mutex);
+}
+
+
+static inline int
+mythread_cond_init(mythread_cond *cond)
+{
+#ifdef MYTHREAD_WIN95
+ *cond = CreateEvent(NULL, FALSE, FALSE, NULL);
+ return *cond == NULL ? -1 : 0;
+#else
+ InitializeConditionVariable(cond);
+ return 0;
+#endif
+}
+
+static inline void
+mythread_cond_destroy(mythread_cond *cond)
+{
+#ifdef MYTHREAD_WIN95
+ CloseHandle(*cond);
+#else
+ (void)cond;
+#endif
+}
+
+static inline void
+mythread_cond_signal(mythread_cond *cond)
+{
+#ifdef MYTHREAD_WIN95
+ SetEvent(*cond);
+#else
+ WakeConditionVariable(cond);
+#endif
+}
+
+static inline void
+mythread_cond_wait(mythread_cond *cond, mythread_mutex *mutex)
+{
+#ifdef MYTHREAD_WIN95
+ LeaveCriticalSection(mutex);
+ WaitForSingleObject(*cond, INFINITE);
+ EnterCriticalSection(mutex);
+#else
+ BOOL ret = SleepConditionVariableCS(cond, mutex, INFINITE);
+ assert(ret);
+ (void)ret;
+#endif
+}
+
+static inline int
+mythread_cond_timedwait(mythread_cond *cond, mythread_mutex *mutex,
+ const mythread_condtime *condtime)
+{
+#ifdef MYTHREAD_WIN95
+ LeaveCriticalSection(mutex);
+#endif
+
+ DWORD elapsed = GetTickCount() - condtime->start;
+ DWORD timeout = elapsed >= condtime->timeout
+ ? 0 : condtime->timeout - elapsed;
+
+#ifdef MYTHREAD_WIN95
+ DWORD ret = WaitForSingleObject(*cond, timeout);
+ assert(ret == WAIT_OBJECT_0 || ret == WAIT_TIMEOUT);
+
+ EnterCriticalSection(mutex);
+
+ return ret == WAIT_TIMEOUT;
+#else
+ BOOL ret = SleepConditionVariableCS(cond, mutex, timeout);
+ assert(ret || GetLastError() == ERROR_TIMEOUT);
+ return !ret;
+#endif
+}
+
+static inline void
+mythread_condtime_set(mythread_condtime *condtime, const mythread_cond *cond,
+ uint32_t timeout)
+{
+ (void)cond;
+ condtime->start = GetTickCount();
+ condtime->timeout = timeout;
+}
+
+#endif
+
+#endif
diff --git a/src/common/sysdefs.h b/src/common/sysdefs.h
new file mode 100644
index 0000000..f04e45d
--- /dev/null
+++ b/src/common/sysdefs.h
@@ -0,0 +1,197 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file sysdefs.h
+/// \brief Common includes, definitions, system-specific things etc.
+///
+/// This file is used also by the lzma command line tool, that's why this
+/// file is separate from common.h.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SYSDEFS_H
+#define LZMA_SYSDEFS_H
+
+//////////////
+// Includes //
+//////////////
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+// This #define ensures that C99 and POSIX compliant stdio functions are
+// available with MinGW-w64 (both 32-bit and 64-bit). Modern MinGW-w64 adds
+// this automatically, for example, when the compiler is in C99 (or later)
+// mode when building against msvcrt.dll. It still doesn't hurt to be explicit
+// that we always want this and #define this unconditionally.
+//
+// With Universal CRT (UCRT) this is less important because UCRT contains
+// C99-compatible stdio functions. It's still nice to #define this as UCRT
+// doesn't support the POSIX thousand separator flag in printf (like "%'u").
+#ifdef __MINGW32__
+# define __USE_MINGW_ANSI_STDIO 1
+#endif
+
+// size_t and NULL
+#include <stddef.h>
+
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+
+// C99 says that inttypes.h always includes stdint.h, but some systems
+// don't do that, and require including stdint.h separately.
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+// Some pre-C99 systems have SIZE_MAX in limits.h instead of stdint.h. The
+// limits are also used to figure out some macros missing from pre-C99 systems.
+#include <limits.h>
+
+// Be more compatible with systems that have non-conforming inttypes.h.
+// We assume that int is 32-bit and that long is either 32-bit or 64-bit.
+// Full Autoconf test could be more correct, but this should work well enough.
+// Note that this duplicates some code from lzma.h, but this is better since
+// we can work without inttypes.h thanks to Autoconf tests.
+#ifndef UINT32_C
+# if UINT_MAX != 4294967295U
+# error UINT32_C is not defined and unsigned int is not 32-bit.
+# endif
+# define UINT32_C(n) n ## U
+#endif
+#ifndef UINT32_MAX
+# define UINT32_MAX UINT32_C(4294967295)
+#endif
+#ifndef PRIu32
+# define PRIu32 "u"
+#endif
+#ifndef PRIx32
+# define PRIx32 "x"
+#endif
+#ifndef PRIX32
+# define PRIX32 "X"
+#endif
+
+#if ULONG_MAX == 4294967295UL
+# ifndef UINT64_C
+# define UINT64_C(n) n ## ULL
+# endif
+# ifndef PRIu64
+# define PRIu64 "llu"
+# endif
+# ifndef PRIx64
+# define PRIx64 "llx"
+# endif
+# ifndef PRIX64
+# define PRIX64 "llX"
+# endif
+#else
+# ifndef UINT64_C
+# define UINT64_C(n) n ## UL
+# endif
+# ifndef PRIu64
+# define PRIu64 "lu"
+# endif
+# ifndef PRIx64
+# define PRIx64 "lx"
+# endif
+# ifndef PRIX64
+# define PRIX64 "lX"
+# endif
+#endif
+#ifndef UINT64_MAX
+# define UINT64_MAX UINT64_C(18446744073709551615)
+#endif
+
+// Incorrect(?) SIZE_MAX:
+// - Interix headers typedef size_t to unsigned long,
+// but a few lines later define SIZE_MAX to INT32_MAX.
+// - SCO OpenServer (x86) headers typedef size_t to unsigned int
+// but define SIZE_MAX to INT32_MAX.
+#if defined(__INTERIX) || defined(_SCO_DS)
+# undef SIZE_MAX
+#endif
+
+// The code currently assumes that size_t is either 32-bit or 64-bit.
+#ifndef SIZE_MAX
+# if SIZEOF_SIZE_T == 4
+# define SIZE_MAX UINT32_MAX
+# elif SIZEOF_SIZE_T == 8
+# define SIZE_MAX UINT64_MAX
+# else
+# error size_t is not 32-bit or 64-bit
+# endif
+#endif
+#if SIZE_MAX != UINT32_MAX && SIZE_MAX != UINT64_MAX
+# error size_t is not 32-bit or 64-bit
+#endif
+
+#include <stdlib.h>
+#include <assert.h>
+
+// Pre-C99 systems lack stdbool.h. All the code in XZ Utils must be written
+// so that it works with fake bool type, for example:
+//
+// bool foo = (flags & 0x100) != 0;
+// bool bar = !!(flags & 0x100);
+//
+// This works with the real C99 bool but breaks with fake bool:
+//
+// bool baz = (flags & 0x100);
+//
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# if ! HAVE__BOOL
+typedef unsigned char _Bool;
+# endif
+# define bool _Bool
+# define false 0
+# define true 1
+# define __bool_true_false_are_defined 1
+#endif
+
+#include <string.h>
+
+// As of MSVC 2013, inline and restrict are supported with
+// non-standard keywords.
+#if defined(_WIN32) && defined(_MSC_VER)
+# ifndef inline
+# define inline __inline
+# endif
+# ifndef restrict
+# define restrict __restrict
+# endif
+#endif
+
+////////////
+// Macros //
+////////////
+
+#undef memzero
+#define memzero(s, n) memset(s, 0, n)
+
+// NOTE: Avoid using MIN() and MAX(), because even conditionally defining
+// those macros can cause some portability trouble, since on some systems
+// the system headers insist defining their own versions.
+#define my_min(x, y) ((x) < (y) ? (x) : (y))
+#define my_max(x, y) ((x) > (y) ? (x) : (y))
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+#endif
+
+#if defined(__GNUC__) \
+ && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4)
+# define lzma_attr_alloc_size(x) __attribute__((__alloc_size__(x)))
+#else
+# define lzma_attr_alloc_size(x)
+#endif
+
+#endif
diff --git a/src/common/tuklib_common.h b/src/common/tuklib_common.h
new file mode 100644
index 0000000..b1f531e
--- /dev/null
+++ b/src/common/tuklib_common.h
@@ -0,0 +1,71 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_common.h
+/// \brief Common definitions for tuklib modules
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_COMMON_H
+#define TUKLIB_COMMON_H
+
+// The config file may be replaced by a package-specific file.
+// It should include at least stddef.h, stdbool.h, inttypes.h, and limits.h.
+#include "tuklib_config.h"
+
+// TUKLIB_SYMBOL_PREFIX is prefixed to all symbols exported by
+// the tuklib modules. If you use a tuklib module in a library,
+// you should use TUKLIB_SYMBOL_PREFIX to make sure that there
+// are no symbol conflicts in case someone links your library
+// into application that also uses the same tuklib module.
+#ifndef TUKLIB_SYMBOL_PREFIX
+# define TUKLIB_SYMBOL_PREFIX
+#endif
+
+#define TUKLIB_CAT_X(a, b) a ## b
+#define TUKLIB_CAT(a, b) TUKLIB_CAT_X(a, b)
+
+#ifndef TUKLIB_SYMBOL
+# define TUKLIB_SYMBOL(sym) TUKLIB_CAT(TUKLIB_SYMBOL_PREFIX, sym)
+#endif
+
+#ifndef TUKLIB_DECLS_BEGIN
+# ifdef __cplusplus
+# define TUKLIB_DECLS_BEGIN extern "C" {
+# else
+# define TUKLIB_DECLS_BEGIN
+# endif
+#endif
+
+#ifndef TUKLIB_DECLS_END
+# ifdef __cplusplus
+# define TUKLIB_DECLS_END }
+# else
+# define TUKLIB_DECLS_END
+# endif
+#endif
+
+#if defined(__GNUC__) && defined(__GNUC_MINOR__)
+# define TUKLIB_GNUC_REQ(major, minor) \
+ ((__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)) \
+ || __GNUC__ > (major))
+#else
+# define TUKLIB_GNUC_REQ(major, minor) 0
+#endif
+
+#if TUKLIB_GNUC_REQ(2, 5)
+# define tuklib_attr_noreturn __attribute__((__noreturn__))
+#else
+# define tuklib_attr_noreturn
+#endif
+
+#if (defined(_WIN32) && !defined(__CYGWIN__)) \
+ || defined(__OS2__) || defined(__MSDOS__)
+# define TUKLIB_DOSLIKE 1
+#endif
+
+#endif
diff --git a/src/common/tuklib_config.h b/src/common/tuklib_config.h
new file mode 100644
index 0000000..9d470ba
--- /dev/null
+++ b/src/common/tuklib_config.h
@@ -0,0 +1,10 @@
+// If config.h isn't available, assume that the headers required by
+// tuklib_common.h are available. This is required by crc32_tablegen.c.
+#ifdef HAVE_CONFIG_H
+# include "sysdefs.h"
+#else
+# include <stddef.h>
+# include <stdbool.h>
+# include <inttypes.h>
+# include <limits.h>
+#endif
diff --git a/src/common/tuklib_cpucores.c b/src/common/tuklib_cpucores.c
new file mode 100644
index 0000000..bb3f2f7
--- /dev/null
+++ b/src/common/tuklib_cpucores.c
@@ -0,0 +1,109 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_cpucores.c
+/// \brief Get the number of CPU cores online
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_cpucores.h"
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+# ifndef _WIN32_WINNT
+# define _WIN32_WINNT 0x0500
+# endif
+# include <windows.h>
+
+// glibc >= 2.9
+#elif defined(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+# include <sched.h>
+
+// FreeBSD
+#elif defined(TUKLIB_CPUCORES_CPUSET)
+# include <sys/param.h>
+# include <sys/cpuset.h>
+
+#elif defined(TUKLIB_CPUCORES_SYSCTL)
+# ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+# endif
+# include <sys/sysctl.h>
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+# include <unistd.h>
+
+// HP-UX
+#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+# include <sys/param.h>
+# include <sys/pstat.h>
+#endif
+
+
+extern uint32_t
+tuklib_cpucores(void)
+{
+ uint32_t ret = 0;
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+ SYSTEM_INFO sysinfo;
+ GetSystemInfo(&sysinfo);
+ ret = sysinfo.dwNumberOfProcessors;
+
+#elif defined(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+ cpu_set_t cpu_mask;
+ if (sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask) == 0)
+ ret = (uint32_t)CPU_COUNT(&cpu_mask);
+
+#elif defined(TUKLIB_CPUCORES_CPUSET)
+ cpuset_t set;
+ if (cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
+ sizeof(set), &set) == 0) {
+# ifdef CPU_COUNT
+ ret = (uint32_t)CPU_COUNT(&set);
+# else
+ for (unsigned i = 0; i < CPU_SETSIZE; ++i)
+ if (CPU_ISSET(i, &set))
+ ++ret;
+# endif
+ }
+
+#elif defined(TUKLIB_CPUCORES_SYSCTL)
+ // On OpenBSD HW_NCPUONLINE tells the number of processor cores that
+ // are online so it is preferred over HW_NCPU which also counts cores
+ // that aren't currently available. The number of cores online is
+ // often less than HW_NCPU because OpenBSD disables simultaneous
+ // multi-threading (SMT) by default.
+# ifdef HW_NCPUONLINE
+ int name[2] = { CTL_HW, HW_NCPUONLINE };
+# else
+ int name[2] = { CTL_HW, HW_NCPU };
+# endif
+ int cpus;
+ size_t cpus_size = sizeof(cpus);
+ if (sysctl(name, 2, &cpus, &cpus_size, NULL, 0) != -1
+ && cpus_size == sizeof(cpus) && cpus > 0)
+ ret = (uint32_t)cpus;
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+# ifdef _SC_NPROCESSORS_ONLN
+ // Most systems
+ const long cpus = sysconf(_SC_NPROCESSORS_ONLN);
+# else
+ // IRIX
+ const long cpus = sysconf(_SC_NPROC_ONLN);
+# endif
+ if (cpus > 0)
+ ret = (uint32_t)cpus;
+
+#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+ struct pst_dynamic pst;
+ if (pstat_getdynamic(&pst, sizeof(pst), 1, 0) != -1)
+ ret = (uint32_t)pst.psd_proc_cnt;
+#endif
+
+ return ret;
+}
diff --git a/src/common/tuklib_cpucores.h b/src/common/tuklib_cpucores.h
new file mode 100644
index 0000000..be1ce1c
--- /dev/null
+++ b/src/common/tuklib_cpucores.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_cpucores.h
+/// \brief Get the number of CPU cores online
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_CPUCORES_H
+#define TUKLIB_CPUCORES_H
+
+#include "tuklib_common.h"
+TUKLIB_DECLS_BEGIN
+
+#define tuklib_cpucores TUKLIB_SYMBOL(tuklib_cpucores)
+extern uint32_t tuklib_cpucores(void);
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/common/tuklib_exit.c b/src/common/tuklib_exit.c
new file mode 100644
index 0000000..aa55620
--- /dev/null
+++ b/src/common/tuklib_exit.c
@@ -0,0 +1,58 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_exit.c
+/// \brief Close stdout and stderr, and exit
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_common.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "tuklib_gettext.h"
+#include "tuklib_progname.h"
+#include "tuklib_exit.h"
+
+
+extern void
+tuklib_exit(int status, int err_status, int show_error)
+{
+ if (status != err_status) {
+ // Close stdout. If something goes wrong,
+ // print an error message to stderr.
+ const int ferror_err = ferror(stdout);
+ const int fclose_err = fclose(stdout);
+ if (ferror_err || fclose_err) {
+ status = err_status;
+
+ // If it was fclose() that failed, we have the reason
+ // in errno. If only ferror() indicated an error,
+ // we have no idea what the reason was.
+ if (show_error)
+ fprintf(stderr, "%s: %s: %s\n", progname,
+ _("Writing to standard "
+ "output failed"),
+ fclose_err ? strerror(errno)
+ : _("Unknown error"));
+ }
+ }
+
+ if (status != err_status) {
+ // Close stderr. If something goes wrong, there's
+ // nothing where we could print an error message.
+ // Just set the exit status.
+ const int ferror_err = ferror(stderr);
+ const int fclose_err = fclose(stderr);
+ if (fclose_err || ferror_err)
+ status = err_status;
+ }
+
+ exit(status);
+}
diff --git a/src/common/tuklib_exit.h b/src/common/tuklib_exit.h
new file mode 100644
index 0000000..b11776f
--- /dev/null
+++ b/src/common/tuklib_exit.h
@@ -0,0 +1,25 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_exit.h
+/// \brief Close stdout and stderr, and exit
+/// \note Requires tuklib_progname and tuklib_gettext modules
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_EXIT_H
+#define TUKLIB_EXIT_H
+
+#include "tuklib_common.h"
+TUKLIB_DECLS_BEGIN
+
+#define tuklib_exit TUKLIB_SYMBOL(tuklib_exit)
+extern void tuklib_exit(int status, int err_status, int show_error)
+ tuklib_attr_noreturn;
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/common/tuklib_gettext.h b/src/common/tuklib_gettext.h
new file mode 100644
index 0000000..ff18904
--- /dev/null
+++ b/src/common/tuklib_gettext.h
@@ -0,0 +1,44 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_gettext.h
+/// \brief Wrapper for gettext and friends
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_GETTEXT_H
+#define TUKLIB_GETTEXT_H
+
+#include "tuklib_common.h"
+#include <locale.h>
+
+#ifndef TUKLIB_GETTEXT
+# ifdef ENABLE_NLS
+# define TUKLIB_GETTEXT 1
+# else
+# define TUKLIB_GETTEXT 0
+# endif
+#endif
+
+#if TUKLIB_GETTEXT
+# include <libintl.h>
+# define tuklib_gettext_init(package, localedir) \
+ do { \
+ setlocale(LC_ALL, ""); \
+ bindtextdomain(package, localedir); \
+ textdomain(package); \
+ } while (0)
+# define _(msgid) gettext(msgid)
+#else
+# define tuklib_gettext_init(package, localedir) \
+ setlocale(LC_ALL, "")
+# define _(msgid) (msgid)
+# define ngettext(msgid1, msgid2, n) ((n) == 1 ? (msgid1) : (msgid2))
+#endif
+#define N_(msgid) msgid
+
+#endif
diff --git a/src/common/tuklib_integer.h b/src/common/tuklib_integer.h
new file mode 100644
index 0000000..e22aa8a
--- /dev/null
+++ b/src/common/tuklib_integer.h
@@ -0,0 +1,946 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_integer.h
+/// \brief Various integer and bit operations
+///
+/// This file provides macros or functions to do some basic integer and bit
+/// operations.
+///
+/// Native endian inline functions (XX = 16, 32, or 64):
+/// - Unaligned native endian reads: readXXne(ptr)
+/// - Unaligned native endian writes: writeXXne(ptr, num)
+/// - Aligned native endian reads: aligned_readXXne(ptr)
+/// - Aligned native endian writes: aligned_writeXXne(ptr, num)
+///
+/// Endianness-converting integer operations (these can be macros!)
+/// (XX = 16, 32, or 64; Y = b or l):
+/// - Byte swapping: bswapXX(num)
+/// - Byte order conversions to/from native (byteswaps if Y isn't
+/// the native endianness): convXXYe(num)
+/// - Unaligned reads: readXXYe(ptr)
+/// - Unaligned writes: writeXXYe(ptr, num)
+/// - Aligned reads: aligned_readXXYe(ptr)
+/// - Aligned writes: aligned_writeXXYe(ptr, num)
+///
+/// Since the above can macros, the arguments should have no side effects
+/// because they may be evaluated more than once.
+///
+/// Bit scan operations for non-zero 32-bit integers (inline functions):
+/// - Bit scan reverse (find highest non-zero bit): bsr32(num)
+/// - Count leading zeros: clz32(num)
+/// - Count trailing zeros: ctz32(num)
+/// - Bit scan forward (simply an alias for ctz32()): bsf32(num)
+///
+/// The above bit scan operations return 0-31. If num is zero,
+/// the result is undefined.
+//
+// Authors: Lasse Collin
+// Joachim Henke
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_INTEGER_H
+#define TUKLIB_INTEGER_H
+
+#include "tuklib_common.h"
+#include <string.h>
+
+// Newer Intel C compilers require immintrin.h for _bit_scan_reverse()
+// and such functions.
+#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 1500)
+# include <immintrin.h>
+// Only include <intrin.h> when it is needed. GCC and Clang can both
+// use __builtin's, so we only need Windows instrincs when using MSVC.
+// GCC and Clang can set _MSC_VER on Windows, so we need to exclude these
+// cases explicitly.
+#elif defined(_MSC_VER) && !TUKLIB_GNUC_REQ(3, 4) && !defined(__clang__)
+# include <intrin.h>
+#endif
+
+
+///////////////////
+// Byte swapping //
+///////////////////
+
+#if defined(HAVE___BUILTIN_BSWAPXX)
+ // GCC >= 4.8 and Clang
+# define bswap16(n) __builtin_bswap16(n)
+# define bswap32(n) __builtin_bswap32(n)
+# define bswap64(n) __builtin_bswap64(n)
+
+#elif defined(HAVE_BYTESWAP_H)
+ // glibc, uClibc, dietlibc
+# include <byteswap.h>
+# ifdef HAVE_BSWAP_16
+# define bswap16(num) bswap_16(num)
+# endif
+# ifdef HAVE_BSWAP_32
+# define bswap32(num) bswap_32(num)
+# endif
+# ifdef HAVE_BSWAP_64
+# define bswap64(num) bswap_64(num)
+# endif
+
+#elif defined(HAVE_SYS_ENDIAN_H)
+ // *BSDs and Darwin
+# include <sys/endian.h>
+
+#elif defined(HAVE_SYS_BYTEORDER_H)
+ // Solaris
+# include <sys/byteorder.h>
+# ifdef BSWAP_16
+# define bswap16(num) BSWAP_16(num)
+# endif
+# ifdef BSWAP_32
+# define bswap32(num) BSWAP_32(num)
+# endif
+# ifdef BSWAP_64
+# define bswap64(num) BSWAP_64(num)
+# endif
+# ifdef BE_16
+# define conv16be(num) BE_16(num)
+# endif
+# ifdef BE_32
+# define conv32be(num) BE_32(num)
+# endif
+# ifdef BE_64
+# define conv64be(num) BE_64(num)
+# endif
+# ifdef LE_16
+# define conv16le(num) LE_16(num)
+# endif
+# ifdef LE_32
+# define conv32le(num) LE_32(num)
+# endif
+# ifdef LE_64
+# define conv64le(num) LE_64(num)
+# endif
+#endif
+
+#ifndef bswap16
+# define bswap16(n) (uint16_t)( \
+ (((n) & 0x00FFU) << 8) \
+ | (((n) & 0xFF00U) >> 8) \
+ )
+#endif
+
+#ifndef bswap32
+# define bswap32(n) (uint32_t)( \
+ (((n) & UINT32_C(0x000000FF)) << 24) \
+ | (((n) & UINT32_C(0x0000FF00)) << 8) \
+ | (((n) & UINT32_C(0x00FF0000)) >> 8) \
+ | (((n) & UINT32_C(0xFF000000)) >> 24) \
+ )
+#endif
+
+#ifndef bswap64
+# define bswap64(n) (uint64_t)( \
+ (((n) & UINT64_C(0x00000000000000FF)) << 56) \
+ | (((n) & UINT64_C(0x000000000000FF00)) << 40) \
+ | (((n) & UINT64_C(0x0000000000FF0000)) << 24) \
+ | (((n) & UINT64_C(0x00000000FF000000)) << 8) \
+ | (((n) & UINT64_C(0x000000FF00000000)) >> 8) \
+ | (((n) & UINT64_C(0x0000FF0000000000)) >> 24) \
+ | (((n) & UINT64_C(0x00FF000000000000)) >> 40) \
+ | (((n) & UINT64_C(0xFF00000000000000)) >> 56) \
+ )
+#endif
+
+// Define conversion macros using the basic byte swapping macros.
+#ifdef WORDS_BIGENDIAN
+# ifndef conv16be
+# define conv16be(num) ((uint16_t)(num))
+# endif
+# ifndef conv32be
+# define conv32be(num) ((uint32_t)(num))
+# endif
+# ifndef conv64be
+# define conv64be(num) ((uint64_t)(num))
+# endif
+# ifndef conv16le
+# define conv16le(num) bswap16(num)
+# endif
+# ifndef conv32le
+# define conv32le(num) bswap32(num)
+# endif
+# ifndef conv64le
+# define conv64le(num) bswap64(num)
+# endif
+#else
+# ifndef conv16be
+# define conv16be(num) bswap16(num)
+# endif
+# ifndef conv32be
+# define conv32be(num) bswap32(num)
+# endif
+# ifndef conv64be
+# define conv64be(num) bswap64(num)
+# endif
+# ifndef conv16le
+# define conv16le(num) ((uint16_t)(num))
+# endif
+# ifndef conv32le
+# define conv32le(num) ((uint32_t)(num))
+# endif
+# ifndef conv64le
+# define conv64le(num) ((uint64_t)(num))
+# endif
+#endif
+
+
+////////////////////////////////
+// Unaligned reads and writes //
+////////////////////////////////
+
+// No-strict-align archs like x86-64
+// ---------------------------------
+//
+// The traditional way of casting e.g. *(const uint16_t *)uint8_pointer
+// is bad even if the uint8_pointer is properly aligned because this kind
+// of casts break strict aliasing rules and result in undefined behavior.
+// With unaligned pointers it's even worse: compilers may emit vector
+// instructions that require aligned pointers even if non-vector
+// instructions work with unaligned pointers.
+//
+// Using memcpy() is the standard compliant way to do unaligned access.
+// Many modern compilers inline it so there is no function call overhead.
+// For those compilers that don't handle the memcpy() method well, the
+// old casting method (that violates strict aliasing) can be requested at
+// build time. A third method, casting to a packed struct, would also be
+// an option but isn't provided to keep things simpler (it's already a mess).
+// Hopefully this is flexible enough in practice.
+//
+// Some compilers on x86-64 like Clang >= 10 and GCC >= 5.1 detect that
+//
+// buf[0] | (buf[1] << 8)
+//
+// reads a 16-bit value and can emit a single 16-bit load and produce
+// identical code than with the memcpy() method. In other cases Clang and GCC
+// produce either the same or better code with memcpy(). For example, Clang 9
+// on x86-64 can detect 32-bit load but not 16-bit load.
+//
+// MSVC uses unaligned access with the memcpy() method but emits byte-by-byte
+// code for "buf[0] | (buf[1] << 8)".
+//
+// Conclusion: The memcpy() method is the best choice when unaligned access
+// is supported.
+//
+// Strict-align archs like SPARC
+// -----------------------------
+//
+// GCC versions from around 4.x to to at least 13.2.0 produce worse code
+// from the memcpy() method than from simple byte-by-byte shift-or code
+// when reading a 32-bit integer:
+//
+// (1) It may be constructed on stack using using four 8-bit loads,
+// four 8-bit stores to stack, and finally one 32-bit load from stack.
+//
+// (2) Especially with -Os, an actual memcpy() call may be emitted.
+//
+// This is true on at least on ARM, ARM64, SPARC, SPARC64, MIPS64EL, and
+// RISC-V. Of these, ARM, ARM64, and RISC-V support unaligned access in
+// some processors but not all so this is relevant only in the case when
+// GCC assumes that unaligned is not supported or -mstrict-align or
+// -mno-unaligned-access is used.
+//
+// For Clang it makes little difference. ARM64 with -O2 -mstrict-align
+// was one the very few with a minor difference: the memcpy() version
+// was one instruction longer.
+//
+// Conclusion: At least in case of GCC and Clang, byte-by-byte code is
+// the best choise for strict-align archs to do unaligned access.
+//
+// See also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111502
+//
+// Thanks to <https://godbolt.org/> it was easy to test different compilers.
+// The following is for little endian targets:
+/*
+#include <stdint.h>
+#include <string.h>
+
+uint32_t bytes16(const uint8_t *b)
+{
+ return (uint32_t)b[0]
+ | ((uint32_t)b[1] << 8);
+}
+
+uint32_t copy16(const uint8_t *b)
+{
+ uint16_t v;
+ memcpy(&v, b, sizeof(v));
+ return v;
+}
+
+uint32_t bytes32(const uint8_t *b)
+{
+ return (uint32_t)b[0]
+ | ((uint32_t)b[1] << 8)
+ | ((uint32_t)b[2] << 16)
+ | ((uint32_t)b[3] << 24);
+}
+
+uint32_t copy32(const uint8_t *b)
+{
+ uint32_t v;
+ memcpy(&v, b, sizeof(v));
+ return v;
+}
+
+void wbytes16(uint8_t *b, uint16_t v)
+{
+ b[0] = (uint8_t)v;
+ b[1] = (uint8_t)(v >> 8);
+}
+
+void wcopy16(uint8_t *b, uint16_t v)
+{
+ memcpy(b, &v, sizeof(v));
+}
+
+void wbytes32(uint8_t *b, uint32_t v)
+{
+ b[0] = (uint8_t)v;
+ b[1] = (uint8_t)(v >> 8);
+ b[2] = (uint8_t)(v >> 16);
+ b[3] = (uint8_t)(v >> 24);
+}
+
+void wcopy32(uint8_t *b, uint32_t v)
+{
+ memcpy(b, &v, sizeof(v));
+}
+*/
+
+
+#ifdef TUKLIB_FAST_UNALIGNED_ACCESS
+
+static inline uint16_t
+read16ne(const uint8_t *buf)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ return *(const uint16_t *)buf;
+#else
+ uint16_t num;
+ memcpy(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline uint32_t
+read32ne(const uint8_t *buf)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ return *(const uint32_t *)buf;
+#else
+ uint32_t num;
+ memcpy(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline uint64_t
+read64ne(const uint8_t *buf)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ return *(const uint64_t *)buf;
+#else
+ uint64_t num;
+ memcpy(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline void
+write16ne(uint8_t *buf, uint16_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint16_t *)buf = num;
+#else
+ memcpy(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline void
+write32ne(uint8_t *buf, uint32_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint32_t *)buf = num;
+#else
+ memcpy(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline void
+write64ne(uint8_t *buf, uint64_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint64_t *)buf = num;
+#else
+ memcpy(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline uint16_t
+read16be(const uint8_t *buf)
+{
+ uint16_t num = read16ne(buf);
+ return conv16be(num);
+}
+
+
+static inline uint16_t
+read16le(const uint8_t *buf)
+{
+ uint16_t num = read16ne(buf);
+ return conv16le(num);
+}
+
+
+static inline uint32_t
+read32be(const uint8_t *buf)
+{
+ uint32_t num = read32ne(buf);
+ return conv32be(num);
+}
+
+
+static inline uint32_t
+read32le(const uint8_t *buf)
+{
+ uint32_t num = read32ne(buf);
+ return conv32le(num);
+}
+
+
+static inline uint64_t
+read64be(const uint8_t *buf)
+{
+ uint64_t num = read64ne(buf);
+ return conv64be(num);
+}
+
+
+static inline uint64_t
+read64le(const uint8_t *buf)
+{
+ uint64_t num = read64ne(buf);
+ return conv64le(num);
+}
+
+
+// NOTE: Possible byte swapping must be done in a macro to allow the compiler
+// to optimize byte swapping of constants when using glibc's or *BSD's
+// byte swapping macros. The actual write is done in an inline function
+// to make type checking of the buf pointer possible.
+#define write16be(buf, num) write16ne(buf, conv16be(num))
+#define write32be(buf, num) write32ne(buf, conv32be(num))
+#define write64be(buf, num) write64ne(buf, conv64be(num))
+#define write16le(buf, num) write16ne(buf, conv16le(num))
+#define write32le(buf, num) write32ne(buf, conv32le(num))
+#define write64le(buf, num) write64ne(buf, conv64le(num))
+
+#else
+
+#ifdef WORDS_BIGENDIAN
+# define read16ne read16be
+# define read32ne read32be
+# define read64ne read64be
+# define write16ne write16be
+# define write32ne write32be
+# define write64ne write64be
+#else
+# define read16ne read16le
+# define read32ne read32le
+# define read64ne read64le
+# define write16ne write16le
+# define write32ne write32le
+# define write64ne write64le
+#endif
+
+
+static inline uint16_t
+read16be(const uint8_t *buf)
+{
+ uint16_t num = ((uint16_t)buf[0] << 8) | (uint16_t)buf[1];
+ return num;
+}
+
+
+static inline uint16_t
+read16le(const uint8_t *buf)
+{
+ uint16_t num = ((uint16_t)buf[0]) | ((uint16_t)buf[1] << 8);
+ return num;
+}
+
+
+static inline uint32_t
+read32be(const uint8_t *buf)
+{
+ uint32_t num = (uint32_t)buf[0] << 24;
+ num |= (uint32_t)buf[1] << 16;
+ num |= (uint32_t)buf[2] << 8;
+ num |= (uint32_t)buf[3];
+ return num;
+}
+
+
+static inline uint32_t
+read32le(const uint8_t *buf)
+{
+ uint32_t num = (uint32_t)buf[0];
+ num |= (uint32_t)buf[1] << 8;
+ num |= (uint32_t)buf[2] << 16;
+ num |= (uint32_t)buf[3] << 24;
+ return num;
+}
+
+
+static inline uint64_t
+read64be(const uint8_t *buf)
+{
+ uint64_t num = (uint64_t)buf[0] << 56;
+ num |= (uint64_t)buf[1] << 48;
+ num |= (uint64_t)buf[2] << 40;
+ num |= (uint64_t)buf[3] << 32;
+ num |= (uint64_t)buf[4] << 24;
+ num |= (uint64_t)buf[5] << 16;
+ num |= (uint64_t)buf[6] << 8;
+ num |= (uint64_t)buf[7];
+ return num;
+}
+
+
+static inline uint64_t
+read64le(const uint8_t *buf)
+{
+ uint64_t num = (uint64_t)buf[0];
+ num |= (uint64_t)buf[1] << 8;
+ num |= (uint64_t)buf[2] << 16;
+ num |= (uint64_t)buf[3] << 24;
+ num |= (uint64_t)buf[4] << 32;
+ num |= (uint64_t)buf[5] << 40;
+ num |= (uint64_t)buf[6] << 48;
+ num |= (uint64_t)buf[7] << 56;
+ return num;
+}
+
+
+static inline void
+write16be(uint8_t *buf, uint16_t num)
+{
+ buf[0] = (uint8_t)(num >> 8);
+ buf[1] = (uint8_t)num;
+ return;
+}
+
+
+static inline void
+write16le(uint8_t *buf, uint16_t num)
+{
+ buf[0] = (uint8_t)num;
+ buf[1] = (uint8_t)(num >> 8);
+ return;
+}
+
+
+static inline void
+write32be(uint8_t *buf, uint32_t num)
+{
+ buf[0] = (uint8_t)(num >> 24);
+ buf[1] = (uint8_t)(num >> 16);
+ buf[2] = (uint8_t)(num >> 8);
+ buf[3] = (uint8_t)num;
+ return;
+}
+
+
+static inline void
+write32le(uint8_t *buf, uint32_t num)
+{
+ buf[0] = (uint8_t)num;
+ buf[1] = (uint8_t)(num >> 8);
+ buf[2] = (uint8_t)(num >> 16);
+ buf[3] = (uint8_t)(num >> 24);
+ return;
+}
+
+
+static inline void
+write64be(uint8_t *buf, uint64_t num)
+{
+ buf[0] = (uint8_t)(num >> 56);
+ buf[1] = (uint8_t)(num >> 48);
+ buf[2] = (uint8_t)(num >> 40);
+ buf[3] = (uint8_t)(num >> 32);
+ buf[4] = (uint8_t)(num >> 24);
+ buf[5] = (uint8_t)(num >> 16);
+ buf[6] = (uint8_t)(num >> 8);
+ buf[7] = (uint8_t)num;
+ return;
+}
+
+
+static inline void
+write64le(uint8_t *buf, uint64_t num)
+{
+ buf[0] = (uint8_t)num;
+ buf[1] = (uint8_t)(num >> 8);
+ buf[2] = (uint8_t)(num >> 16);
+ buf[3] = (uint8_t)(num >> 24);
+ buf[4] = (uint8_t)(num >> 32);
+ buf[5] = (uint8_t)(num >> 40);
+ buf[6] = (uint8_t)(num >> 48);
+ buf[7] = (uint8_t)(num >> 56);
+ return;
+}
+
+#endif
+
+
+//////////////////////////////
+// Aligned reads and writes //
+//////////////////////////////
+
+// Separate functions for aligned reads and writes are provided since on
+// strict-align archs aligned access is much faster than unaligned access.
+//
+// Just like in the unaligned case, memcpy() is needed to avoid
+// strict aliasing violations. However, on archs that don't support
+// unaligned access the compiler cannot know that the pointers given
+// to memcpy() are aligned which results in slow code. As of C11 there is
+// no standard way to tell the compiler that we know that the address is
+// aligned but some compilers have language extensions to do that. With
+// such language extensions the memcpy() method gives excellent results.
+//
+// What to do on a strict-align system when no known language extentensions
+// are available? Falling back to byte-by-byte access would be safe but ruin
+// optimizations that have been made specifically with aligned access in mind.
+// As a compromise, aligned reads will fall back to non-compliant type punning
+// but aligned writes will be byte-by-byte, that is, fast reads are preferred
+// over fast writes. This obviously isn't great but hopefully it's a working
+// compromise for now.
+//
+// __builtin_assume_aligned is support by GCC >= 4.7 and clang >= 3.6.
+#ifdef HAVE___BUILTIN_ASSUME_ALIGNED
+# define tuklib_memcpy_aligned(dest, src, size) \
+ memcpy(dest, __builtin_assume_aligned(src, size), size)
+#else
+# define tuklib_memcpy_aligned(dest, src, size) \
+ memcpy(dest, src, size)
+# ifndef TUKLIB_FAST_UNALIGNED_ACCESS
+# define TUKLIB_USE_UNSAFE_ALIGNED_READS 1
+# endif
+#endif
+
+
+static inline uint16_t
+aligned_read16ne(const uint8_t *buf)
+{
+#if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \
+ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS)
+ return *(const uint16_t *)buf;
+#else
+ uint16_t num;
+ tuklib_memcpy_aligned(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline uint32_t
+aligned_read32ne(const uint8_t *buf)
+{
+#if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \
+ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS)
+ return *(const uint32_t *)buf;
+#else
+ uint32_t num;
+ tuklib_memcpy_aligned(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline uint64_t
+aligned_read64ne(const uint8_t *buf)
+{
+#if defined(TUKLIB_USE_UNSAFE_TYPE_PUNNING) \
+ || defined(TUKLIB_USE_UNSAFE_ALIGNED_READS)
+ return *(const uint64_t *)buf;
+#else
+ uint64_t num;
+ tuklib_memcpy_aligned(&num, buf, sizeof(num));
+ return num;
+#endif
+}
+
+
+static inline void
+aligned_write16ne(uint8_t *buf, uint16_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint16_t *)buf = num;
+#else
+ tuklib_memcpy_aligned(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline void
+aligned_write32ne(uint8_t *buf, uint32_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint32_t *)buf = num;
+#else
+ tuklib_memcpy_aligned(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline void
+aligned_write64ne(uint8_t *buf, uint64_t num)
+{
+#ifdef TUKLIB_USE_UNSAFE_TYPE_PUNNING
+ *(uint64_t *)buf = num;
+#else
+ tuklib_memcpy_aligned(buf, &num, sizeof(num));
+#endif
+ return;
+}
+
+
+static inline uint16_t
+aligned_read16be(const uint8_t *buf)
+{
+ uint16_t num = aligned_read16ne(buf);
+ return conv16be(num);
+}
+
+
+static inline uint16_t
+aligned_read16le(const uint8_t *buf)
+{
+ uint16_t num = aligned_read16ne(buf);
+ return conv16le(num);
+}
+
+
+static inline uint32_t
+aligned_read32be(const uint8_t *buf)
+{
+ uint32_t num = aligned_read32ne(buf);
+ return conv32be(num);
+}
+
+
+static inline uint32_t
+aligned_read32le(const uint8_t *buf)
+{
+ uint32_t num = aligned_read32ne(buf);
+ return conv32le(num);
+}
+
+
+static inline uint64_t
+aligned_read64be(const uint8_t *buf)
+{
+ uint64_t num = aligned_read64ne(buf);
+ return conv64be(num);
+}
+
+
+static inline uint64_t
+aligned_read64le(const uint8_t *buf)
+{
+ uint64_t num = aligned_read64ne(buf);
+ return conv64le(num);
+}
+
+
+// These need to be macros like in the unaligned case.
+#define aligned_write16be(buf, num) aligned_write16ne((buf), conv16be(num))
+#define aligned_write16le(buf, num) aligned_write16ne((buf), conv16le(num))
+#define aligned_write32be(buf, num) aligned_write32ne((buf), conv32be(num))
+#define aligned_write32le(buf, num) aligned_write32ne((buf), conv32le(num))
+#define aligned_write64be(buf, num) aligned_write64ne((buf), conv64be(num))
+#define aligned_write64le(buf, num) aligned_write64ne((buf), conv64le(num))
+
+
+////////////////////
+// Bit operations //
+////////////////////
+
+static inline uint32_t
+bsr32(uint32_t n)
+{
+ // Check for ICC first, since it tends to define __GNUC__ too.
+#if defined(__INTEL_COMPILER)
+ return _bit_scan_reverse(n);
+
+#elif (TUKLIB_GNUC_REQ(3, 4) || defined(__clang__)) && UINT_MAX == UINT32_MAX
+ // GCC >= 3.4 has __builtin_clz(), which gives good results on
+ // multiple architectures. On x86, __builtin_clz() ^ 31U becomes
+ // either plain BSR (so the XOR gets optimized away) or LZCNT and
+ // XOR (if -march indicates that SSE4a instructions are supported).
+ return (uint32_t)__builtin_clz(n) ^ 31U;
+
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+ uint32_t i;
+ __asm__("bsrl %1, %0" : "=r" (i) : "rm" (n));
+ return i;
+
+#elif defined(_MSC_VER)
+ unsigned long i;
+ _BitScanReverse(&i, n);
+ return i;
+
+#else
+ uint32_t i = 31;
+
+ if ((n & 0xFFFF0000) == 0) {
+ n <<= 16;
+ i = 15;
+ }
+
+ if ((n & 0xFF000000) == 0) {
+ n <<= 8;
+ i -= 8;
+ }
+
+ if ((n & 0xF0000000) == 0) {
+ n <<= 4;
+ i -= 4;
+ }
+
+ if ((n & 0xC0000000) == 0) {
+ n <<= 2;
+ i -= 2;
+ }
+
+ if ((n & 0x80000000) == 0)
+ --i;
+
+ return i;
+#endif
+}
+
+
+static inline uint32_t
+clz32(uint32_t n)
+{
+#if defined(__INTEL_COMPILER)
+ return _bit_scan_reverse(n) ^ 31U;
+
+#elif (TUKLIB_GNUC_REQ(3, 4) || defined(__clang__)) && UINT_MAX == UINT32_MAX
+ return (uint32_t)__builtin_clz(n);
+
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+ uint32_t i;
+ __asm__("bsrl %1, %0\n\t"
+ "xorl $31, %0"
+ : "=r" (i) : "rm" (n));
+ return i;
+
+#elif defined(_MSC_VER)
+ unsigned long i;
+ _BitScanReverse(&i, n);
+ return i ^ 31U;
+
+#else
+ uint32_t i = 0;
+
+ if ((n & 0xFFFF0000) == 0) {
+ n <<= 16;
+ i = 16;
+ }
+
+ if ((n & 0xFF000000) == 0) {
+ n <<= 8;
+ i += 8;
+ }
+
+ if ((n & 0xF0000000) == 0) {
+ n <<= 4;
+ i += 4;
+ }
+
+ if ((n & 0xC0000000) == 0) {
+ n <<= 2;
+ i += 2;
+ }
+
+ if ((n & 0x80000000) == 0)
+ ++i;
+
+ return i;
+#endif
+}
+
+
+static inline uint32_t
+ctz32(uint32_t n)
+{
+#if defined(__INTEL_COMPILER)
+ return _bit_scan_forward(n);
+
+#elif (TUKLIB_GNUC_REQ(3, 4) || defined(__clang__)) && UINT_MAX >= UINT32_MAX
+ return (uint32_t)__builtin_ctz(n);
+
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+ uint32_t i;
+ __asm__("bsfl %1, %0" : "=r" (i) : "rm" (n));
+ return i;
+
+#elif defined(_MSC_VER)
+ unsigned long i;
+ _BitScanForward(&i, n);
+ return i;
+
+#else
+ uint32_t i = 0;
+
+ if ((n & 0x0000FFFF) == 0) {
+ n >>= 16;
+ i = 16;
+ }
+
+ if ((n & 0x000000FF) == 0) {
+ n >>= 8;
+ i += 8;
+ }
+
+ if ((n & 0x0000000F) == 0) {
+ n >>= 4;
+ i += 4;
+ }
+
+ if ((n & 0x00000003) == 0) {
+ n >>= 2;
+ i += 2;
+ }
+
+ if ((n & 0x00000001) == 0)
+ ++i;
+
+ return i;
+#endif
+}
+
+#define bsf32 ctz32
+
+#endif
diff --git a/src/common/tuklib_mbstr.h b/src/common/tuklib_mbstr.h
new file mode 100644
index 0000000..dde9305
--- /dev/null
+++ b/src/common/tuklib_mbstr.h
@@ -0,0 +1,66 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_mbstr.h
+/// \brief Utility functions for handling multibyte strings
+///
+/// If not enough multibyte string support is available in the C library,
+/// these functions keep working with the assumption that all strings
+/// are in a single-byte character set without combining characters, e.g.
+/// US-ASCII or ISO-8859-*.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_MBSTR_H
+#define TUKLIB_MBSTR_H
+
+#include "tuklib_common.h"
+TUKLIB_DECLS_BEGIN
+
+#define tuklib_mbstr_width TUKLIB_SYMBOL(tuklib_mbstr_width)
+extern size_t tuklib_mbstr_width(const char *str, size_t *bytes);
+///<
+/// \brief Get the number of columns needed for the multibyte string
+///
+/// This is somewhat similar to wcswidth() but works on multibyte strings.
+///
+/// \param str String whose width is to be calculated. If the
+/// current locale uses a multibyte character set
+/// that has shift states, the string must begin
+/// and end in the initial shift state.
+/// \param bytes If this is not NULL, *bytes is set to the
+/// value returned by strlen(str) (even if an
+/// error occurs when calculating the width).
+///
+/// \return On success, the number of columns needed to display the
+/// string e.g. in a terminal emulator is returned. On error,
+/// (size_t)-1 is returned. Possible errors include invalid,
+/// partial, or non-printable multibyte character in str, or
+/// that str doesn't end in the initial shift state.
+
+#define tuklib_mbstr_fw TUKLIB_SYMBOL(tuklib_mbstr_fw)
+extern int tuklib_mbstr_fw(const char *str, int columns_min);
+///<
+/// \brief Get the field width for printf() e.g. to align table columns
+///
+/// Printing simple tables to a terminal can be done using the field field
+/// feature in the printf() format string, but it works only with single-byte
+/// character sets. To do the same with multibyte strings, tuklib_mbstr_fw()
+/// can be used to calculate appropriate field width.
+///
+/// The behavior of this function is undefined, if
+/// - str is NULL or not terminated with '\0';
+/// - columns_min <= 0; or
+/// - the calculated field width exceeds INT_MAX.
+///
+/// \return If tuklib_mbstr_width(str, NULL) fails, -1 is returned.
+/// If str needs more columns than columns_min, zero is returned.
+/// Otherwise a positive integer is returned, which can be
+/// used as the field width, e.g. printf("%*s", fw, str).
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/common/tuklib_mbstr_fw.c b/src/common/tuklib_mbstr_fw.c
new file mode 100644
index 0000000..64c9ad5
--- /dev/null
+++ b/src/common/tuklib_mbstr_fw.c
@@ -0,0 +1,31 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_mbstr_fw.c
+/// \brief Get the field width for printf() e.g. to align table columns
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_mbstr.h"
+
+
+extern int
+tuklib_mbstr_fw(const char *str, int columns_min)
+{
+ size_t len;
+ const size_t width = tuklib_mbstr_width(str, &len);
+ if (width == (size_t)-1)
+ return -1;
+
+ if (width > (size_t)columns_min)
+ return 0;
+
+ if (width < (size_t)columns_min)
+ len += (size_t)columns_min - width;
+
+ return (int)len;
+}
diff --git a/src/common/tuklib_mbstr_width.c b/src/common/tuklib_mbstr_width.c
new file mode 100644
index 0000000..69d159e
--- /dev/null
+++ b/src/common/tuklib_mbstr_width.c
@@ -0,0 +1,65 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_mbstr_width.c
+/// \brief Calculate width of a multibyte string
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_mbstr.h"
+#include <string.h>
+
+#if defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH)
+# include <wchar.h>
+#endif
+
+
+extern size_t
+tuklib_mbstr_width(const char *str, size_t *bytes)
+{
+ const size_t len = strlen(str);
+ if (bytes != NULL)
+ *bytes = len;
+
+#if !(defined(HAVE_MBRTOWC) && defined(HAVE_WCWIDTH))
+ // In single-byte mode, the width of the string is the same
+ // as its length.
+ return len;
+
+#else
+ mbstate_t state;
+ memset(&state, 0, sizeof(state));
+
+ size_t width = 0;
+ size_t i = 0;
+
+ // Convert one multibyte character at a time to wchar_t
+ // and get its width using wcwidth().
+ while (i < len) {
+ wchar_t wc;
+ const size_t ret = mbrtowc(&wc, str + i, len - i, &state);
+ if (ret < 1 || ret > len)
+ return (size_t)-1;
+
+ i += ret;
+
+ const int wc_width = wcwidth(wc);
+ if (wc_width < 0)
+ return (size_t)-1;
+
+ width += (size_t)wc_width;
+ }
+
+ // Require that the string ends in the initial shift state.
+ // This way the caller can be combine the string with other
+ // strings without needing to worry about the shift states.
+ if (!mbsinit(&state))
+ return (size_t)-1;
+
+ return width;
+#endif
+}
diff --git a/src/common/tuklib_open_stdxxx.c b/src/common/tuklib_open_stdxxx.c
new file mode 100644
index 0000000..26702a6
--- /dev/null
+++ b/src/common/tuklib_open_stdxxx.c
@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_open_stdxxx.c
+/// \brief Make sure that file descriptors 0, 1, and 2 are open
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_open_stdxxx.h"
+
+#ifndef TUKLIB_DOSLIKE
+# include <stdlib.h>
+# include <errno.h>
+# include <fcntl.h>
+# include <unistd.h>
+#endif
+
+
+extern void
+tuklib_open_stdxxx(int err_status)
+{
+#ifdef TUKLIB_DOSLIKE
+ // Do nothing, just silence warnings.
+ (void)err_status;
+
+#else
+ for (int i = 0; i <= 2; ++i) {
+ // We use fcntl() to check if the file descriptor is open.
+ if (fcntl(i, F_GETFD) == -1 && errno == EBADF) {
+ // With stdin, we could use /dev/full so that
+ // writing to stdin would fail. However, /dev/full
+ // is Linux specific, and if the program tries to
+ // write to stdin, there's already a problem anyway.
+ const int fd = open("/dev/null", O_NOCTTY
+ | (i == 0 ? O_WRONLY : O_RDONLY));
+
+ if (fd != i) {
+ if (fd != -1)
+ (void)close(fd);
+
+ // Something went wrong. Exit with the
+ // exit status we were given. Don't try
+ // to print an error message, since stderr
+ // may very well be non-existent. This
+ // error should be extremely rare.
+ exit(err_status);
+ }
+ }
+ }
+#endif
+
+ return;
+}
diff --git a/src/common/tuklib_open_stdxxx.h b/src/common/tuklib_open_stdxxx.h
new file mode 100644
index 0000000..b911616
--- /dev/null
+++ b/src/common/tuklib_open_stdxxx.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_open_stdxxx.h
+/// \brief Make sure that file descriptors 0, 1, and 2 are open
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_OPEN_STDXXX_H
+#define TUKLIB_OPEN_STDXXX_H
+
+#include "tuklib_common.h"
+TUKLIB_DECLS_BEGIN
+
+#define tuklib_open_stdxx TUKLIB_SYMBOL(tuklib_open_stdxxx)
+extern void tuklib_open_stdxxx(int err_status);
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/common/tuklib_physmem.c b/src/common/tuklib_physmem.c
new file mode 100644
index 0000000..69f6fd4
--- /dev/null
+++ b/src/common/tuklib_physmem.c
@@ -0,0 +1,234 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_physmem.c
+/// \brief Get the amount of physical memory
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_physmem.h"
+
+// We want to use Windows-specific code on Cygwin, which also has memory
+// information available via sysconf(), but on Cygwin 1.5 and older it
+// gives wrong results (from our point of view).
+#if defined(_WIN32) || defined(__CYGWIN__)
+# ifndef _WIN32_WINNT
+# define _WIN32_WINNT 0x0500
+# endif
+# include <windows.h>
+
+#elif defined(__OS2__)
+# define INCL_DOSMISC
+# include <os2.h>
+
+#elif defined(__DJGPP__)
+# include <dpmi.h>
+
+#elif defined(__VMS)
+# include <lib$routines.h>
+# include <syidef.h>
+# include <ssdef.h>
+
+#elif defined(AMIGA) || defined(__AROS__)
+# define __USE_INLINE__
+# include <proto/exec.h>
+
+#elif defined(__QNX__)
+# include <sys/syspage.h>
+# include <string.h>
+
+#elif defined(TUKLIB_PHYSMEM_AIX)
+# include <sys/systemcfg.h>
+
+#elif defined(TUKLIB_PHYSMEM_SYSCONF)
+# include <unistd.h>
+
+#elif defined(TUKLIB_PHYSMEM_SYSCTL)
+# ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+# endif
+# include <sys/sysctl.h>
+
+// Tru64
+#elif defined(TUKLIB_PHYSMEM_GETSYSINFO)
+# include <sys/sysinfo.h>
+# include <machine/hal_sysinfo.h>
+
+// HP-UX
+#elif defined(TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
+# include <sys/param.h>
+# include <sys/pstat.h>
+
+// IRIX
+#elif defined(TUKLIB_PHYSMEM_GETINVENT_R)
+# include <invent.h>
+
+// This sysinfo() is Linux-specific.
+#elif defined(TUKLIB_PHYSMEM_SYSINFO)
+# include <sys/sysinfo.h>
+#endif
+
+
+// With GCC >= 8.1 with -Wextra and Clang >= 13 with -Wcast-function-type
+// will warn about the Windows-specific code.
+#if defined(__has_warning)
+# if __has_warning("-Wcast-function-type")
+# define CAN_DISABLE_WCAST_FUNCTION_TYPE 1
+# endif
+#elif TUKLIB_GNUC_REQ(8,1)
+# define CAN_DISABLE_WCAST_FUNCTION_TYPE 1
+#endif
+
+
+extern uint64_t
+tuklib_physmem(void)
+{
+ uint64_t ret = 0;
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+ if ((GetVersion() & 0xFF) >= 5) {
+ // Windows 2000 and later have GlobalMemoryStatusEx() which
+ // supports reporting values greater than 4 GiB. To keep the
+ // code working also on older Windows versions, use
+ // GlobalMemoryStatusEx() conditionally.
+ HMODULE kernel32 = GetModuleHandle(TEXT("kernel32.dll"));
+ if (kernel32 != NULL) {
+ typedef BOOL (WINAPI *gmse_type)(LPMEMORYSTATUSEX);
+#ifdef CAN_DISABLE_WCAST_FUNCTION_TYPE
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wcast-function-type"
+#endif
+ gmse_type gmse = (gmse_type)GetProcAddress(
+ kernel32, "GlobalMemoryStatusEx");
+#ifdef CAN_DISABLE_WCAST_FUNCTION_TYPE
+# pragma GCC diagnostic pop
+#endif
+ if (gmse != NULL) {
+ MEMORYSTATUSEX meminfo;
+ meminfo.dwLength = sizeof(meminfo);
+ if (gmse(&meminfo))
+ ret = meminfo.ullTotalPhys;
+ }
+ }
+ }
+
+ if (ret == 0) {
+ // GlobalMemoryStatus() is supported by Windows 95 and later,
+ // so it is fine to link against it unconditionally. Note that
+ // GlobalMemoryStatus() has no return value.
+ MEMORYSTATUS meminfo;
+ meminfo.dwLength = sizeof(meminfo);
+ GlobalMemoryStatus(&meminfo);
+ ret = meminfo.dwTotalPhys;
+ }
+
+#elif defined(__OS2__)
+ unsigned long mem;
+ if (DosQuerySysInfo(QSV_TOTPHYSMEM, QSV_TOTPHYSMEM,
+ &mem, sizeof(mem)) == 0)
+ ret = mem;
+
+#elif defined(__DJGPP__)
+ __dpmi_free_mem_info meminfo;
+ if (__dpmi_get_free_memory_information(&meminfo) == 0
+ && meminfo.total_number_of_physical_pages
+ != (unsigned long)-1)
+ ret = (uint64_t)meminfo.total_number_of_physical_pages * 4096;
+
+#elif defined(__VMS)
+ int vms_mem;
+ int val = SYI$_MEMSIZE;
+ if (LIB$GETSYI(&val, &vms_mem, 0, 0, 0, 0) == SS$_NORMAL)
+ ret = (uint64_t)vms_mem * 8192;
+
+#elif defined(AMIGA) || defined(__AROS__)
+ ret = AvailMem(MEMF_TOTAL);
+
+#elif defined(__QNX__)
+ const struct asinfo_entry *entries = SYSPAGE_ENTRY(asinfo);
+ size_t count = SYSPAGE_ENTRY_SIZE(asinfo) / sizeof(struct asinfo_entry);
+ const char *strings = SYSPAGE_ENTRY(strings)->data;
+
+ for (size_t i = 0; i < count; ++i)
+ if (strcmp(strings + entries[i].name, "ram") == 0)
+ ret += entries[i].end - entries[i].start + 1;
+
+#elif defined(TUKLIB_PHYSMEM_AIX)
+ ret = _system_configuration.physmem;
+
+#elif defined(TUKLIB_PHYSMEM_SYSCONF)
+ const long pagesize = sysconf(_SC_PAGESIZE);
+ const long pages = sysconf(_SC_PHYS_PAGES);
+ if (pagesize != -1 && pages != -1)
+ // According to docs, pagesize * pages can overflow.
+ // Simple case is 32-bit box with 4 GiB or more RAM,
+ // which may report exactly 4 GiB of RAM, and "long"
+ // being 32-bit will overflow. Casting to uint64_t
+ // hopefully avoids overflows in the near future.
+ ret = (uint64_t)pagesize * (uint64_t)pages;
+
+#elif defined(TUKLIB_PHYSMEM_SYSCTL)
+ int name[2] = {
+ CTL_HW,
+#ifdef HW_PHYSMEM64
+ HW_PHYSMEM64
+#else
+ HW_PHYSMEM
+#endif
+ };
+ union {
+ uint32_t u32;
+ uint64_t u64;
+ } mem;
+ size_t mem_ptr_size = sizeof(mem.u64);
+ if (sysctl(name, 2, &mem.u64, &mem_ptr_size, NULL, 0) != -1) {
+ // IIRC, 64-bit "return value" is possible on some 64-bit
+ // BSD systems even with HW_PHYSMEM (instead of HW_PHYSMEM64),
+ // so support both.
+ if (mem_ptr_size == sizeof(mem.u64))
+ ret = mem.u64;
+ else if (mem_ptr_size == sizeof(mem.u32))
+ ret = mem.u32;
+ }
+
+#elif defined(TUKLIB_PHYSMEM_GETSYSINFO)
+ // Docs are unclear if "start" is needed, but it doesn't hurt
+ // much to have it.
+ int memkb;
+ int start = 0;
+ if (getsysinfo(GSI_PHYSMEM, (caddr_t)&memkb, sizeof(memkb), &start)
+ != -1)
+ ret = (uint64_t)memkb * 1024;
+
+#elif defined(TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
+ struct pst_static pst;
+ if (pstat_getstatic(&pst, sizeof(pst), 1, 0) != -1)
+ ret = (uint64_t)pst.physical_memory * (uint64_t)pst.page_size;
+
+#elif defined(TUKLIB_PHYSMEM_GETINVENT_R)
+ inv_state_t *st = NULL;
+ if (setinvent_r(&st) != -1) {
+ inventory_t *i;
+ while ((i = getinvent_r(st)) != NULL) {
+ if (i->inv_class == INV_MEMORY
+ && i->inv_type == INV_MAIN_MB) {
+ ret = (uint64_t)i->inv_state << 20;
+ break;
+ }
+ }
+
+ endinvent_r(st);
+ }
+
+#elif defined(TUKLIB_PHYSMEM_SYSINFO)
+ struct sysinfo si;
+ if (sysinfo(&si) == 0)
+ ret = (uint64_t)si.totalram * si.mem_unit;
+#endif
+
+ return ret;
+}
diff --git a/src/common/tuklib_physmem.h b/src/common/tuklib_physmem.h
new file mode 100644
index 0000000..09e2a51
--- /dev/null
+++ b/src/common/tuklib_physmem.h
@@ -0,0 +1,28 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_physmem.h
+/// \brief Get the amount of physical memory
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_PHYSMEM_H
+#define TUKLIB_PHYSMEM_H
+
+#include "tuklib_common.h"
+TUKLIB_DECLS_BEGIN
+
+#define tuklib_physmem TUKLIB_SYMBOL(tuklib_physmem)
+extern uint64_t tuklib_physmem(void);
+///<
+/// \brief Get the amount of physical memory in bytes
+///
+/// \return Amount of physical memory in bytes. On error, zero is
+/// returned.
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/common/tuklib_progname.c b/src/common/tuklib_progname.c
new file mode 100644
index 0000000..e2ef4e5
--- /dev/null
+++ b/src/common/tuklib_progname.c
@@ -0,0 +1,50 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_progname.c
+/// \brief Program name to be displayed in messages
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_progname.h"
+#include <string.h>
+
+
+#ifndef HAVE_PROGRAM_INVOCATION_NAME
+char *progname = NULL;
+#endif
+
+
+extern void
+tuklib_progname_init(char **argv)
+{
+#ifdef TUKLIB_DOSLIKE
+ // On these systems, argv[0] always has the full path and .exe
+ // suffix even if the user just types the plain program name.
+ // We modify argv[0] to make it nicer to read.
+
+ // Strip the leading path.
+ char *p = argv[0] + strlen(argv[0]);
+ while (argv[0] < p && p[-1] != '/' && p[-1] != '\\')
+ --p;
+
+ argv[0] = p;
+
+ // Strip the .exe suffix.
+ p = strrchr(p, '.');
+ if (p != NULL)
+ *p = '\0';
+
+ // Make it lowercase.
+ for (p = argv[0]; *p != '\0'; ++p)
+ if (*p >= 'A' && *p <= 'Z')
+ *p = *p - 'A' + 'a';
+#endif
+
+ progname = argv[0];
+ return;
+}
diff --git a/src/common/tuklib_progname.h b/src/common/tuklib_progname.h
new file mode 100644
index 0000000..bb80f25
--- /dev/null
+++ b/src/common/tuklib_progname.h
@@ -0,0 +1,32 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file tuklib_progname.h
+/// \brief Program name to be displayed in messages
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef TUKLIB_PROGNAME_H
+#define TUKLIB_PROGNAME_H
+
+#include "tuklib_common.h"
+#include <errno.h>
+
+TUKLIB_DECLS_BEGIN
+
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
+# define progname program_invocation_name
+#else
+# define progname TUKLIB_SYMBOL(tuklib_progname)
+ extern char *progname;
+#endif
+
+#define tuklib_progname_init TUKLIB_SYMBOL(tuklib_progname_init)
+extern void tuklib_progname_init(char **argv);
+
+TUKLIB_DECLS_END
+#endif
diff --git a/src/liblzma/Makefile.am b/src/liblzma/Makefile.am
new file mode 100644
index 0000000..23d524f
--- /dev/null
+++ b/src/liblzma/Makefile.am
@@ -0,0 +1,130 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+SUBDIRS = api
+
+EXTRA_DIST =
+CLEANFILES =
+doc_DATA =
+
+lib_LTLIBRARIES = liblzma.la
+liblzma_la_SOURCES =
+liblzma_la_CPPFLAGS = \
+ -I$(top_srcdir)/src/liblzma/api \
+ -I$(top_srcdir)/src/liblzma/common \
+ -I$(top_srcdir)/src/liblzma/check \
+ -I$(top_srcdir)/src/liblzma/lz \
+ -I$(top_srcdir)/src/liblzma/rangecoder \
+ -I$(top_srcdir)/src/liblzma/lzma \
+ -I$(top_srcdir)/src/liblzma/delta \
+ -I$(top_srcdir)/src/liblzma/simple \
+ -I$(top_srcdir)/src/common \
+ -DTUKLIB_SYMBOL_PREFIX=lzma_
+liblzma_la_LDFLAGS = -no-undefined -version-info 9:5:4
+
+EXTRA_DIST += liblzma_generic.map liblzma_linux.map validate_map.sh
+if COND_SYMVERS_GENERIC
+liblzma_la_LDFLAGS += \
+ -Wl,--version-script=$(top_srcdir)/src/liblzma/liblzma_generic.map
+endif
+if COND_SYMVERS_LINUX
+liblzma_la_LDFLAGS += \
+ -Wl,--version-script=$(top_srcdir)/src/liblzma/liblzma_linux.map
+endif
+
+liblzma_la_SOURCES += ../common/tuklib_physmem.c
+
+if COND_THREADS
+liblzma_la_SOURCES += ../common/tuklib_cpucores.c
+endif
+
+include $(srcdir)/common/Makefile.inc
+include $(srcdir)/check/Makefile.inc
+
+if COND_FILTER_LZ
+include $(srcdir)/lz/Makefile.inc
+endif
+
+if COND_FILTER_LZMA1
+include $(srcdir)/lzma/Makefile.inc
+include $(srcdir)/rangecoder/Makefile.inc
+endif
+
+if COND_FILTER_DELTA
+include $(srcdir)/delta/Makefile.inc
+endif
+
+if COND_FILTER_SIMPLE
+include $(srcdir)/simple/Makefile.inc
+endif
+
+
+## Windows-specific stuff
+
+# Windows resource compiler support. libtool knows what to do with .rc
+# files, but Automake (<= 1.11 at least) doesn't know.
+#
+# We want the resource file only in shared liblzma. To avoid linking it into
+# static liblzma, we overwrite the static object file with an object file
+# compiled from empty input. Note that GNU-specific features are OK here,
+# because on Windows we are compiled with the GNU toolchain.
+#
+# The typedef in empty.c will prevent an empty translation unit, which is
+# not allowed by the C standard. It results in a warning with
+# -Wempty-translation-unit with Clang or -pedantic for GCC.
+.rc.lo:
+ $(LIBTOOL) --mode=compile $(RC) $(DEFS) $(DEFAULT_INCLUDES) \
+ $(INCLUDES) $(liblzma_la_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) \
+ -i $< -o $@
+ echo "typedef void empty;" > empty.c
+ $(COMPILE) -c empty.c -o $(*D)/$(*F).o
+
+# Remove ordinals from the generated .def file. People must link by name,
+# not by ordinal, because no one is going to track the ordinal numbers.
+liblzma.def: liblzma.la liblzma.def.in
+ sed 's/ \+@ *[0-9]\+//' liblzma.def.in > liblzma.def
+
+# Creating liblzma.def.in is a side effect of linking the library.
+liblzma.def.in: liblzma.la
+
+if COND_W32
+CLEANFILES += liblzma.def liblzma.def.in empty.c
+liblzma_la_SOURCES += liblzma_w32res.rc
+liblzma_la_LDFLAGS += -Xlinker --output-def -Xlinker liblzma.def.in
+
+## liblzma.def.in is created only when building shared liblzma, so don't
+## try to create liblzma.def when not building shared liblzma.
+if COND_SHARED
+doc_DATA += liblzma.def
+endif
+endif
+
+
+## pkg-config
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = liblzma.pc
+EXTRA_DIST += liblzma.pc.in
+
+pc_verbose = $(pc_verbose_@AM_V@)
+pc_verbose_ = $(pc_verbose_@AM_DEFAULT_V@)
+pc_verbose_0 = @echo " PC " $@;
+
+liblzma.pc: $(srcdir)/liblzma.pc.in
+ $(AM_V_at)rm -f $@
+ $(pc_verbose)sed \
+ -e 's,@prefix[@],$(prefix),g' \
+ -e 's,@exec_prefix[@],$(exec_prefix),g' \
+ -e 's,@libdir[@],$(libdir),g' \
+ -e 's,@includedir[@],$(includedir),g' \
+ -e 's,@PACKAGE_URL[@],$(PACKAGE_URL),g' \
+ -e 's,@PACKAGE_VERSION[@],$(PACKAGE_VERSION),g' \
+ -e 's,@PTHREAD_CFLAGS[@],$(PTHREAD_CFLAGS),g' \
+ -e 's,@LIBS[@],$(LIBS),g' \
+ < $(srcdir)/liblzma.pc.in > $@ || { rm -f $@; exit 1; }
+
+clean-local:
+ rm -f liblzma.pc
diff --git a/src/liblzma/Makefile.in b/src/liblzma/Makefile.in
new file mode 100644
index 0000000..2689fc4
--- /dev/null
+++ b/src/liblzma/Makefile.in
@@ -0,0 +1,2236 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
+ true; \
+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+ true; \
+ else \
+ false; \
+ fi; \
+}
+am__make_running_with_option = \
+ case $${target_option-} in \
+ ?) ;; \
+ *) echo "am__make_running_with_option: internal error: invalid" \
+ "target option '$${target_option-}' specified" >&2; \
+ exit 1;; \
+ esac; \
+ has_opt=no; \
+ sane_makeflags=$$MAKEFLAGS; \
+ if $(am__is_gnu_make); then \
+ sane_makeflags=$$MFLAGS; \
+ else \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ bs=\\; \
+ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
+ esac; \
+ fi; \
+ skip_next=no; \
+ strip_trailopt () \
+ { \
+ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+ }; \
+ for flg in $$sane_makeflags; do \
+ test $$skip_next = yes && { skip_next=no; continue; }; \
+ case $$flg in \
+ *=*|--*) continue;; \
+ -*I) strip_trailopt 'I'; skip_next=yes;; \
+ -*I?*) strip_trailopt 'I';; \
+ -*O) strip_trailopt 'O'; skip_next=yes;; \
+ -*O?*) strip_trailopt 'O';; \
+ -*l) strip_trailopt 'l'; skip_next=yes;; \
+ -*l?*) strip_trailopt 'l';; \
+ -[dEDm]) skip_next=yes;; \
+ -[JT]) skip_next=yes;; \
+ esac; \
+ case $$flg in \
+ *$$target_option*) has_opt=yes; break;; \
+ esac; \
+ done; \
+ test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+@COND_SYMVERS_GENERIC_TRUE@am__append_1 = \
+@COND_SYMVERS_GENERIC_TRUE@ -Wl,--version-script=$(top_srcdir)/src/liblzma/liblzma_generic.map
+
+@COND_SYMVERS_LINUX_TRUE@am__append_2 = \
+@COND_SYMVERS_LINUX_TRUE@ -Wl,--version-script=$(top_srcdir)/src/liblzma/liblzma_linux.map
+
+@COND_THREADS_TRUE@am__append_3 = ../common/tuklib_cpucores.c
+@COND_THREADS_TRUE@am__append_4 = \
+@COND_THREADS_TRUE@ common/hardware_cputhreads.c \
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+
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+@COND_MAIN_ENCODER_TRUE@ common/easy_buffer_encoder.c \
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+@COND_MAIN_ENCODER_TRUE@ common/easy_encoder_memusage.c \
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+@COND_MAIN_ENCODER_TRUE@ common/filter_encoder.h \
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+@COND_MAIN_ENCODER_TRUE@ common/index_encoder.c \
+@COND_MAIN_ENCODER_TRUE@ common/index_encoder.h \
+@COND_MAIN_ENCODER_TRUE@ common/stream_buffer_encoder.c \
+@COND_MAIN_ENCODER_TRUE@ common/stream_encoder.c \
+@COND_MAIN_ENCODER_TRUE@ common/stream_flags_encoder.c \
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+
+@COND_MAIN_ENCODER_TRUE@@COND_THREADS_TRUE@am__append_6 = \
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+
+@COND_MAIN_ENCODER_TRUE@@COND_MICROLZMA_TRUE@am__append_7 = \
+@COND_MAIN_ENCODER_TRUE@@COND_MICROLZMA_TRUE@ common/microlzma_encoder.c
+
+@COND_MAIN_DECODER_TRUE@am__append_8 = \
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+@COND_MAIN_DECODER_TRUE@ common/alone_decoder.h \
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+@COND_MAIN_DECODER_TRUE@ common/block_buffer_decoder.c \
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+@COND_MAIN_DECODER_TRUE@ common/block_decoder.h \
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+@COND_MAIN_DECODER_TRUE@ common/filter_decoder.h \
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+@COND_FILTER_LZMA1_TRUE@am__append_23 = lzma/fastpos_tablegen.c \
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+@COND_FILTER_LZMA1_TRUE@am__append_30 = rangecoder/range_common.h
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+ ../common/tuklib_cpucores.c common/common.c common/common.h \
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+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-recursive
+
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+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+ am--depfiles check check-am clean clean-generic \
+ clean-libLTLIBRARIES clean-libtool clean-local cscopelist-am \
+ ctags ctags-am distclean distclean-compile distclean-generic \
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+
+
+# Windows resource compiler support. libtool knows what to do with .rc
+# files, but Automake (<= 1.11 at least) doesn't know.
+#
+# We want the resource file only in shared liblzma. To avoid linking it into
+# static liblzma, we overwrite the static object file with an object file
+# compiled from empty input. Note that GNU-specific features are OK here,
+# because on Windows we are compiled with the GNU toolchain.
+#
+# The typedef in empty.c will prevent an empty translation unit, which is
+# not allowed by the C standard. It results in a warning with
+# -Wempty-translation-unit with Clang or -pedantic for GCC.
+.rc.lo:
+ $(LIBTOOL) --mode=compile $(RC) $(DEFS) $(DEFAULT_INCLUDES) \
+ $(INCLUDES) $(liblzma_la_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) \
+ -i $< -o $@
+ echo "typedef void empty;" > empty.c
+ $(COMPILE) -c empty.c -o $(*D)/$(*F).o
+
+# Remove ordinals from the generated .def file. People must link by name,
+# not by ordinal, because no one is going to track the ordinal numbers.
+liblzma.def: liblzma.la liblzma.def.in
+ sed 's/ \+@ *[0-9]\+//' liblzma.def.in > liblzma.def
+
+# Creating liblzma.def.in is a side effect of linking the library.
+liblzma.def.in: liblzma.la
+
+liblzma.pc: $(srcdir)/liblzma.pc.in
+ $(AM_V_at)rm -f $@
+ $(pc_verbose)sed \
+ -e 's,@prefix[@],$(prefix),g' \
+ -e 's,@exec_prefix[@],$(exec_prefix),g' \
+ -e 's,@libdir[@],$(libdir),g' \
+ -e 's,@includedir[@],$(includedir),g' \
+ -e 's,@PACKAGE_URL[@],$(PACKAGE_URL),g' \
+ -e 's,@PACKAGE_VERSION[@],$(PACKAGE_VERSION),g' \
+ -e 's,@PTHREAD_CFLAGS[@],$(PTHREAD_CFLAGS),g' \
+ -e 's,@LIBS[@],$(LIBS),g' \
+ < $(srcdir)/liblzma.pc.in > $@ || { rm -f $@; exit 1; }
+
+clean-local:
+ rm -f liblzma.pc
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/liblzma/api/Makefile.am b/src/liblzma/api/Makefile.am
new file mode 100644
index 0000000..db24600
--- /dev/null
+++ b/src/liblzma/api/Makefile.am
@@ -0,0 +1,23 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+nobase_include_HEADERS = \
+ lzma.h \
+ lzma/base.h \
+ lzma/bcj.h \
+ lzma/block.h \
+ lzma/check.h \
+ lzma/container.h \
+ lzma/delta.h \
+ lzma/filter.h \
+ lzma/hardware.h \
+ lzma/index.h \
+ lzma/index_hash.h \
+ lzma/lzma12.h \
+ lzma/stream_flags.h \
+ lzma/version.h \
+ lzma/vli.h
diff --git a/src/liblzma/api/Makefile.in b/src/liblzma/api/Makefile.in
new file mode 100644
index 0000000..ea5cfd6
--- /dev/null
+++ b/src/liblzma/api/Makefile.in
@@ -0,0 +1,630 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
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+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
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+ else \
+ false; \
+ fi; \
+}
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diff --git a/src/liblzma/api/lzma.h b/src/liblzma/api/lzma.h
new file mode 100644
index 0000000..de12f22
--- /dev/null
+++ b/src/liblzma/api/lzma.h
@@ -0,0 +1,328 @@
+/**
+ * \file api/lzma.h
+ * \brief The public API of liblzma data compression library
+ * \mainpage
+ *
+ * liblzma is a public domain general-purpose data compression library with
+ * a zlib-like API. The native file format is .xz, but also the old .lzma
+ * format and raw (no headers) streams are supported. Multiple compression
+ * algorithms (filters) are supported. Currently LZMA2 is the primary filter.
+ *
+ * liblzma is part of XZ Utils <https://tukaani.org/xz/>. XZ Utils includes
+ * a gzip-like command line tool named xz and some other tools. XZ Utils
+ * is developed and maintained by Lasse Collin and Jia Tan.
+ *
+ * Major parts of liblzma are based on Igor Pavlov's public domain LZMA SDK
+ * <https://7-zip.org/sdk.html>.
+ *
+ * The SHA-256 implementation is based on the public domain code found from
+ * 7-Zip <https://7-zip.org/>, which has a modified version of the public
+ * domain SHA-256 code found from Crypto++ <https://www.cryptopp.com/>.
+ * The SHA-256 code in Crypto++ was written by Kevin Springle and Wei Dai.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H
+#define LZMA_H
+
+/*****************************
+ * Required standard headers *
+ *****************************/
+
+/*
+ * liblzma API headers need some standard types and macros. To allow
+ * including lzma.h without requiring the application to include other
+ * headers first, lzma.h includes the required standard headers unless
+ * they already seem to be included already or if LZMA_MANUAL_HEADERS
+ * has been defined.
+ *
+ * Here's what types and macros are needed and from which headers:
+ * - stddef.h: size_t, NULL
+ * - stdint.h: uint8_t, uint32_t, uint64_t, UINT32_C(n), uint64_C(n),
+ * UINT32_MAX, UINT64_MAX
+ *
+ * However, inttypes.h is a little more portable than stdint.h, although
+ * inttypes.h declares some unneeded things compared to plain stdint.h.
+ *
+ * The hacks below aren't perfect, specifically they assume that inttypes.h
+ * exists and that it typedefs at least uint8_t, uint32_t, and uint64_t,
+ * and that, in case of incomplete inttypes.h, unsigned int is 32-bit.
+ * If the application already takes care of setting up all the types and
+ * macros properly (for example by using gnulib's stdint.h or inttypes.h),
+ * we try to detect that the macros are already defined and don't include
+ * inttypes.h here again. However, you may define LZMA_MANUAL_HEADERS to
+ * force this file to never include any system headers.
+ *
+ * Some could argue that liblzma API should provide all the required types,
+ * for example lzma_uint64, LZMA_UINT64_C(n), and LZMA_UINT64_MAX. This was
+ * seen as an unnecessary mess, since most systems already provide all the
+ * necessary types and macros in the standard headers.
+ *
+ * Note that liblzma API still has lzma_bool, because using stdbool.h would
+ * break C89 and C++ programs on many systems. sizeof(bool) in C99 isn't
+ * necessarily the same as sizeof(bool) in C++.
+ */
+
+#ifndef LZMA_MANUAL_HEADERS
+ /*
+ * I suppose this works portably also in C++. Note that in C++,
+ * we need to get size_t into the global namespace.
+ */
+# include <stddef.h>
+
+ /*
+ * Skip inttypes.h if we already have all the required macros. If we
+ * have the macros, we assume that we have the matching typedefs too.
+ */
+# if !defined(UINT32_C) || !defined(UINT64_C) \
+ || !defined(UINT32_MAX) || !defined(UINT64_MAX)
+ /*
+ * MSVC versions older than 2013 have no C99 support, and
+ * thus they cannot be used to compile liblzma. Using an
+ * existing liblzma.dll with old MSVC can work though(*),
+ * but we need to define the required standard integer
+ * types here in a MSVC-specific way.
+ *
+ * (*) If you do this, the existing liblzma.dll probably uses
+ * a different runtime library than your MSVC-built
+ * application. Mixing runtimes is generally bad, but
+ * in this case it should work as long as you avoid
+ * the few rarely-needed liblzma functions that allocate
+ * memory and expect the caller to free it using free().
+ */
+# if defined(_WIN32) && defined(_MSC_VER) && _MSC_VER < 1800
+ typedef unsigned __int8 uint8_t;
+ typedef unsigned __int32 uint32_t;
+ typedef unsigned __int64 uint64_t;
+# else
+ /* Use the standard inttypes.h. */
+# ifdef __cplusplus
+ /*
+ * C99 sections 7.18.2 and 7.18.4 specify
+ * that C++ implementations define the limit
+ * and constant macros only if specifically
+ * requested. Note that if you want the
+ * format macros (PRIu64 etc.) too, you need
+ * to define __STDC_FORMAT_MACROS before
+ * including lzma.h, since re-including
+ * inttypes.h with __STDC_FORMAT_MACROS
+ * defined doesn't necessarily work.
+ */
+# ifndef __STDC_LIMIT_MACROS
+# define __STDC_LIMIT_MACROS 1
+# endif
+# ifndef __STDC_CONSTANT_MACROS
+# define __STDC_CONSTANT_MACROS 1
+# endif
+# endif
+
+# include <inttypes.h>
+# endif
+
+ /*
+ * Some old systems have only the typedefs in inttypes.h, and
+ * lack all the macros. For those systems, we need a few more
+ * hacks. We assume that unsigned int is 32-bit and unsigned
+ * long is either 32-bit or 64-bit. If these hacks aren't
+ * enough, the application has to setup the types manually
+ * before including lzma.h.
+ */
+# ifndef UINT32_C
+# if defined(_WIN32) && defined(_MSC_VER)
+# define UINT32_C(n) n ## UI32
+# else
+# define UINT32_C(n) n ## U
+# endif
+# endif
+
+# ifndef UINT64_C
+# if defined(_WIN32) && defined(_MSC_VER)
+# define UINT64_C(n) n ## UI64
+# else
+ /* Get ULONG_MAX. */
+# include <limits.h>
+# if ULONG_MAX == 4294967295UL
+# define UINT64_C(n) n ## ULL
+# else
+# define UINT64_C(n) n ## UL
+# endif
+# endif
+# endif
+
+# ifndef UINT32_MAX
+# define UINT32_MAX (UINT32_C(4294967295))
+# endif
+
+# ifndef UINT64_MAX
+# define UINT64_MAX (UINT64_C(18446744073709551615))
+# endif
+# endif
+#endif /* ifdef LZMA_MANUAL_HEADERS */
+
+
+/******************
+ * LZMA_API macro *
+ ******************/
+
+/*
+ * Some systems require that the functions and function pointers are
+ * declared specially in the headers. LZMA_API_IMPORT is for importing
+ * symbols and LZMA_API_CALL is to specify the calling convention.
+ *
+ * By default it is assumed that the application will link dynamically
+ * against liblzma. #define LZMA_API_STATIC in your application if you
+ * want to link against static liblzma. If you don't care about portability
+ * to operating systems like Windows, or at least don't care about linking
+ * against static liblzma on them, don't worry about LZMA_API_STATIC. That
+ * is, most developers will never need to use LZMA_API_STATIC.
+ *
+ * The GCC variants are a special case on Windows (Cygwin and MinGW-w64).
+ * We rely on GCC doing the right thing with its auto-import feature,
+ * and thus don't use __declspec(dllimport). This way developers don't
+ * need to worry about LZMA_API_STATIC. Also the calling convention is
+ * omitted on Cygwin but not on MinGW-w64.
+ */
+#ifndef LZMA_API_IMPORT
+# if !defined(LZMA_API_STATIC) && defined(_WIN32) && !defined(__GNUC__)
+# define LZMA_API_IMPORT __declspec(dllimport)
+# else
+# define LZMA_API_IMPORT
+# endif
+#endif
+
+#ifndef LZMA_API_CALL
+# if defined(_WIN32) && !defined(__CYGWIN__)
+# define LZMA_API_CALL __cdecl
+# else
+# define LZMA_API_CALL
+# endif
+#endif
+
+#ifndef LZMA_API
+# define LZMA_API(type) LZMA_API_IMPORT type LZMA_API_CALL
+#endif
+
+
+/***********
+ * nothrow *
+ ***********/
+
+/*
+ * None of the functions in liblzma may throw an exception. Even
+ * the functions that use callback functions won't throw exceptions,
+ * because liblzma would break if a callback function threw an exception.
+ */
+#ifndef lzma_nothrow
+# if defined(__cplusplus)
+# if __cplusplus >= 201103L || (defined(_MSVC_LANG) \
+ && _MSVC_LANG >= 201103L)
+# define lzma_nothrow noexcept
+# else
+# define lzma_nothrow throw()
+# endif
+# elif defined(__GNUC__) && (__GNUC__ > 3 \
+ || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3))
+# define lzma_nothrow __attribute__((__nothrow__))
+# else
+# define lzma_nothrow
+# endif
+#endif
+
+
+/********************
+ * GNU C extensions *
+ ********************/
+
+/*
+ * GNU C extensions are used conditionally in the public API. It doesn't
+ * break anything if these are sometimes enabled and sometimes not, only
+ * affects warnings and optimizations.
+ */
+#if defined(__GNUC__) && __GNUC__ >= 3
+# ifndef lzma_attribute
+# define lzma_attribute(attr) __attribute__(attr)
+# endif
+
+ /* warn_unused_result was added in GCC 3.4. */
+# ifndef lzma_attr_warn_unused_result
+# if __GNUC__ == 3 && __GNUC_MINOR__ < 4
+# define lzma_attr_warn_unused_result
+# endif
+# endif
+
+#else
+# ifndef lzma_attribute
+# define lzma_attribute(attr)
+# endif
+#endif
+
+
+#ifndef lzma_attr_pure
+# define lzma_attr_pure lzma_attribute((__pure__))
+#endif
+
+#ifndef lzma_attr_const
+# define lzma_attr_const lzma_attribute((__const__))
+#endif
+
+#ifndef lzma_attr_warn_unused_result
+# define lzma_attr_warn_unused_result \
+ lzma_attribute((__warn_unused_result__))
+#endif
+
+
+/**************
+ * Subheaders *
+ **************/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Subheaders check that this is defined. It is to prevent including
+ * them directly from applications.
+ */
+#define LZMA_H_INTERNAL 1
+
+/* Basic features */
+#include "lzma/version.h"
+#include "lzma/base.h"
+#include "lzma/vli.h"
+#include "lzma/check.h"
+
+/* Filters */
+#include "lzma/filter.h"
+#include "lzma/bcj.h"
+#include "lzma/delta.h"
+#include "lzma/lzma12.h"
+
+/* Container formats */
+#include "lzma/container.h"
+
+/* Advanced features */
+#include "lzma/stream_flags.h"
+#include "lzma/block.h"
+#include "lzma/index.h"
+#include "lzma/index_hash.h"
+
+/* Hardware information */
+#include "lzma/hardware.h"
+
+/*
+ * All subheaders included. Undefine LZMA_H_INTERNAL to prevent applications
+ * re-including the subheaders.
+ */
+#undef LZMA_H_INTERNAL
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ifndef LZMA_H */
diff --git a/src/liblzma/api/lzma/base.h b/src/liblzma/api/lzma/base.h
new file mode 100644
index 0000000..75cdd72
--- /dev/null
+++ b/src/liblzma/api/lzma/base.h
@@ -0,0 +1,748 @@
+/**
+ * \file lzma/base.h
+ * \brief Data types and functions used in many places in liblzma API
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Boolean
+ *
+ * This is here because C89 doesn't have stdbool.h. To set a value for
+ * variables having type lzma_bool, you can use
+ * - C99's `true' and `false' from stdbool.h;
+ * - C++'s internal `true' and `false'; or
+ * - integers one (true) and zero (false).
+ */
+typedef unsigned char lzma_bool;
+
+
+/**
+ * \brief Type of reserved enumeration variable in structures
+ *
+ * To avoid breaking library ABI when new features are added, several
+ * structures contain extra variables that may be used in future. Since
+ * sizeof(enum) can be different than sizeof(int), and sizeof(enum) may
+ * even vary depending on the range of enumeration constants, we specify
+ * a separate type to be used for reserved enumeration variables. All
+ * enumeration constants in liblzma API will be non-negative and less
+ * than 128, which should guarantee that the ABI won't break even when
+ * new constants are added to existing enumerations.
+ */
+typedef enum {
+ LZMA_RESERVED_ENUM = 0
+} lzma_reserved_enum;
+
+
+/**
+ * \brief Return values used by several functions in liblzma
+ *
+ * Check the descriptions of specific functions to find out which return
+ * values they can return. With some functions the return values may have
+ * more specific meanings than described here; those differences are
+ * described per-function basis.
+ */
+typedef enum {
+ LZMA_OK = 0,
+ /**<
+ * \brief Operation completed successfully
+ */
+
+ LZMA_STREAM_END = 1,
+ /**<
+ * \brief End of stream was reached
+ *
+ * In encoder, LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, or
+ * LZMA_FINISH was finished. In decoder, this indicates
+ * that all the data was successfully decoded.
+ *
+ * In all cases, when LZMA_STREAM_END is returned, the last
+ * output bytes should be picked from strm->next_out.
+ */
+
+ LZMA_NO_CHECK = 2,
+ /**<
+ * \brief Input stream has no integrity check
+ *
+ * This return value can be returned only if the
+ * LZMA_TELL_NO_CHECK flag was used when initializing
+ * the decoder. LZMA_NO_CHECK is just a warning, and
+ * the decoding can be continued normally.
+ *
+ * It is possible to call lzma_get_check() immediately after
+ * lzma_code has returned LZMA_NO_CHECK. The result will
+ * naturally be LZMA_CHECK_NONE, but the possibility to call
+ * lzma_get_check() may be convenient in some applications.
+ */
+
+ LZMA_UNSUPPORTED_CHECK = 3,
+ /**<
+ * \brief Cannot calculate the integrity check
+ *
+ * The usage of this return value is different in encoders
+ * and decoders.
+ *
+ * Encoders can return this value only from the initialization
+ * function. If initialization fails with this value, the
+ * encoding cannot be done, because there's no way to produce
+ * output with the correct integrity check.
+ *
+ * Decoders can return this value only from lzma_code() and
+ * only if the LZMA_TELL_UNSUPPORTED_CHECK flag was used when
+ * initializing the decoder. The decoding can still be
+ * continued normally even if the check type is unsupported,
+ * but naturally the check will not be validated, and possible
+ * errors may go undetected.
+ *
+ * With decoder, it is possible to call lzma_get_check()
+ * immediately after lzma_code() has returned
+ * LZMA_UNSUPPORTED_CHECK. This way it is possible to find
+ * out what the unsupported Check ID was.
+ */
+
+ LZMA_GET_CHECK = 4,
+ /**<
+ * \brief Integrity check type is now available
+ *
+ * This value can be returned only by the lzma_code() function
+ * and only if the decoder was initialized with the
+ * LZMA_TELL_ANY_CHECK flag. LZMA_GET_CHECK tells the
+ * application that it may now call lzma_get_check() to find
+ * out the Check ID. This can be used, for example, to
+ * implement a decoder that accepts only files that have
+ * strong enough integrity check.
+ */
+
+ LZMA_MEM_ERROR = 5,
+ /**<
+ * \brief Cannot allocate memory
+ *
+ * Memory allocation failed, or the size of the allocation
+ * would be greater than SIZE_MAX.
+ *
+ * Due to internal implementation reasons, the coding cannot
+ * be continued even if more memory were made available after
+ * LZMA_MEM_ERROR.
+ */
+
+ LZMA_MEMLIMIT_ERROR = 6,
+ /**<
+ * \brief Memory usage limit was reached
+ *
+ * Decoder would need more memory than allowed by the
+ * specified memory usage limit. To continue decoding,
+ * the memory usage limit has to be increased with
+ * lzma_memlimit_set().
+ *
+ * liblzma 5.2.6 and earlier had a bug in single-threaded .xz
+ * decoder (lzma_stream_decoder()) which made it impossible
+ * to continue decoding after LZMA_MEMLIMIT_ERROR even if
+ * the limit was increased using lzma_memlimit_set().
+ * Other decoders worked correctly.
+ */
+
+ LZMA_FORMAT_ERROR = 7,
+ /**<
+ * \brief File format not recognized
+ *
+ * The decoder did not recognize the input as supported file
+ * format. This error can occur, for example, when trying to
+ * decode .lzma format file with lzma_stream_decoder,
+ * because lzma_stream_decoder accepts only the .xz format.
+ */
+
+ LZMA_OPTIONS_ERROR = 8,
+ /**<
+ * \brief Invalid or unsupported options
+ *
+ * Invalid or unsupported options, for example
+ * - unsupported filter(s) or filter options; or
+ * - reserved bits set in headers (decoder only).
+ *
+ * Rebuilding liblzma with more features enabled, or
+ * upgrading to a newer version of liblzma may help.
+ */
+
+ LZMA_DATA_ERROR = 9,
+ /**<
+ * \brief Data is corrupt
+ *
+ * The usage of this return value is different in encoders
+ * and decoders. In both encoder and decoder, the coding
+ * cannot continue after this error.
+ *
+ * Encoders return this if size limits of the target file
+ * format would be exceeded. These limits are huge, thus
+ * getting this error from an encoder is mostly theoretical.
+ * For example, the maximum compressed and uncompressed
+ * size of a .xz Stream is roughly 8 EiB (2^63 bytes).
+ *
+ * Decoders return this error if the input data is corrupt.
+ * This can mean, for example, invalid CRC32 in headers
+ * or invalid check of uncompressed data.
+ */
+
+ LZMA_BUF_ERROR = 10,
+ /**<
+ * \brief No progress is possible
+ *
+ * This error code is returned when the coder cannot consume
+ * any new input and produce any new output. The most common
+ * reason for this error is that the input stream being
+ * decoded is truncated or corrupt.
+ *
+ * This error is not fatal. Coding can be continued normally
+ * by providing more input and/or more output space, if
+ * possible.
+ *
+ * Typically the first call to lzma_code() that can do no
+ * progress returns LZMA_OK instead of LZMA_BUF_ERROR. Only
+ * the second consecutive call doing no progress will return
+ * LZMA_BUF_ERROR. This is intentional.
+ *
+ * With zlib, Z_BUF_ERROR may be returned even if the
+ * application is doing nothing wrong, so apps will need
+ * to handle Z_BUF_ERROR specially. The above hack
+ * guarantees that liblzma never returns LZMA_BUF_ERROR
+ * to properly written applications unless the input file
+ * is truncated or corrupt. This should simplify the
+ * applications a little.
+ */
+
+ LZMA_PROG_ERROR = 11,
+ /**<
+ * \brief Programming error
+ *
+ * This indicates that the arguments given to the function are
+ * invalid or the internal state of the decoder is corrupt.
+ * - Function arguments are invalid or the structures
+ * pointed by the argument pointers are invalid
+ * e.g. if strm->next_out has been set to NULL and
+ * strm->avail_out > 0 when calling lzma_code().
+ * - lzma_* functions have been called in wrong order
+ * e.g. lzma_code() was called right after lzma_end().
+ * - If errors occur randomly, the reason might be flaky
+ * hardware.
+ *
+ * If you think that your code is correct, this error code
+ * can be a sign of a bug in liblzma. See the documentation
+ * how to report bugs.
+ */
+
+ LZMA_SEEK_NEEDED = 12,
+ /**<
+ * \brief Request to change the input file position
+ *
+ * Some coders can do random access in the input file. The
+ * initialization functions of these coders take the file size
+ * as an argument. No other coders can return LZMA_SEEK_NEEDED.
+ *
+ * When this value is returned, the application must seek to
+ * the file position given in lzma_stream.seek_pos. This value
+ * is guaranteed to never exceed the file size that was
+ * specified at the coder initialization.
+ *
+ * After seeking the application should read new input and
+ * pass it normally via lzma_stream.next_in and .avail_in.
+ */
+
+ /*
+ * These eumerations may be used internally by liblzma
+ * but they will never be returned to applications.
+ */
+ LZMA_RET_INTERNAL1 = 101,
+ LZMA_RET_INTERNAL2 = 102,
+ LZMA_RET_INTERNAL3 = 103,
+ LZMA_RET_INTERNAL4 = 104,
+ LZMA_RET_INTERNAL5 = 105,
+ LZMA_RET_INTERNAL6 = 106,
+ LZMA_RET_INTERNAL7 = 107,
+ LZMA_RET_INTERNAL8 = 108
+} lzma_ret;
+
+
+/**
+ * \brief The `action' argument for lzma_code()
+ *
+ * After the first use of LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, LZMA_FULL_BARRIER,
+ * or LZMA_FINISH, the same `action' must be used until lzma_code() returns
+ * LZMA_STREAM_END. Also, the amount of input (that is, strm->avail_in) must
+ * not be modified by the application until lzma_code() returns
+ * LZMA_STREAM_END. Changing the `action' or modifying the amount of input
+ * will make lzma_code() return LZMA_PROG_ERROR.
+ */
+typedef enum {
+ LZMA_RUN = 0,
+ /**<
+ * \brief Continue coding
+ *
+ * Encoder: Encode as much input as possible. Some internal
+ * buffering will probably be done (depends on the filter
+ * chain in use), which causes latency: the input used won't
+ * usually be decodeable from the output of the same
+ * lzma_code() call.
+ *
+ * Decoder: Decode as much input as possible and produce as
+ * much output as possible.
+ */
+
+ LZMA_SYNC_FLUSH = 1,
+ /**<
+ * \brief Make all the input available at output
+ *
+ * Normally the encoder introduces some latency.
+ * LZMA_SYNC_FLUSH forces all the buffered data to be
+ * available at output without resetting the internal
+ * state of the encoder. This way it is possible to use
+ * compressed stream for example for communication over
+ * network.
+ *
+ * Only some filters support LZMA_SYNC_FLUSH. Trying to use
+ * LZMA_SYNC_FLUSH with filters that don't support it will
+ * make lzma_code() return LZMA_OPTIONS_ERROR. For example,
+ * LZMA1 doesn't support LZMA_SYNC_FLUSH but LZMA2 does.
+ *
+ * Using LZMA_SYNC_FLUSH very often can dramatically reduce
+ * the compression ratio. With some filters (for example,
+ * LZMA2), fine-tuning the compression options may help
+ * mitigate this problem significantly (for example,
+ * match finder with LZMA2).
+ *
+ * Decoders don't support LZMA_SYNC_FLUSH.
+ */
+
+ LZMA_FULL_FLUSH = 2,
+ /**<
+ * \brief Finish encoding of the current Block
+ *
+ * All the input data going to the current Block must have
+ * been given to the encoder (the last bytes can still be
+ * pending in *next_in). Call lzma_code() with LZMA_FULL_FLUSH
+ * until it returns LZMA_STREAM_END. Then continue normally
+ * with LZMA_RUN or finish the Stream with LZMA_FINISH.
+ *
+ * This action is currently supported only by Stream encoder
+ * and easy encoder (which uses Stream encoder). If there is
+ * no unfinished Block, no empty Block is created.
+ */
+
+ LZMA_FULL_BARRIER = 4,
+ /**<
+ * \brief Finish encoding of the current Block
+ *
+ * This is like LZMA_FULL_FLUSH except that this doesn't
+ * necessarily wait until all the input has been made
+ * available via the output buffer. That is, lzma_code()
+ * might return LZMA_STREAM_END as soon as all the input
+ * has been consumed (avail_in == 0).
+ *
+ * LZMA_FULL_BARRIER is useful with a threaded encoder if
+ * one wants to split the .xz Stream into Blocks at specific
+ * offsets but doesn't care if the output isn't flushed
+ * immediately. Using LZMA_FULL_BARRIER allows keeping
+ * the threads busy while LZMA_FULL_FLUSH would make
+ * lzma_code() wait until all the threads have finished
+ * until more data could be passed to the encoder.
+ *
+ * With a lzma_stream initialized with the single-threaded
+ * lzma_stream_encoder() or lzma_easy_encoder(),
+ * LZMA_FULL_BARRIER is an alias for LZMA_FULL_FLUSH.
+ */
+
+ LZMA_FINISH = 3
+ /**<
+ * \brief Finish the coding operation
+ *
+ * All the input data must have been given to the encoder
+ * (the last bytes can still be pending in next_in).
+ * Call lzma_code() with LZMA_FINISH until it returns
+ * LZMA_STREAM_END. Once LZMA_FINISH has been used,
+ * the amount of input must no longer be changed by
+ * the application.
+ *
+ * When decoding, using LZMA_FINISH is optional unless the
+ * LZMA_CONCATENATED flag was used when the decoder was
+ * initialized. When LZMA_CONCATENATED was not used, the only
+ * effect of LZMA_FINISH is that the amount of input must not
+ * be changed just like in the encoder.
+ */
+} lzma_action;
+
+
+/**
+ * \brief Custom functions for memory handling
+ *
+ * A pointer to lzma_allocator may be passed via lzma_stream structure
+ * to liblzma, and some advanced functions take a pointer to lzma_allocator
+ * as a separate function argument. The library will use the functions
+ * specified in lzma_allocator for memory handling instead of the default
+ * malloc() and free(). C++ users should note that the custom memory
+ * handling functions must not throw exceptions.
+ *
+ * Single-threaded mode only: liblzma doesn't make an internal copy of
+ * lzma_allocator. Thus, it is OK to change these function pointers in
+ * the middle of the coding process, but obviously it must be done
+ * carefully to make sure that the replacement `free' can deallocate
+ * memory allocated by the earlier `alloc' function(s).
+ *
+ * Multithreaded mode: liblzma might internally store pointers to the
+ * lzma_allocator given via the lzma_stream structure. The application
+ * must not change the allocator pointer in lzma_stream or the contents
+ * of the pointed lzma_allocator structure until lzma_end() has been used
+ * to free the memory associated with that lzma_stream. The allocation
+ * functions might be called simultaneously from multiple threads, and
+ * thus they must be thread safe.
+ */
+typedef struct {
+ /**
+ * \brief Pointer to a custom memory allocation function
+ *
+ * If you don't want a custom allocator, but still want
+ * custom free(), set this to NULL and liblzma will use
+ * the standard malloc().
+ *
+ * \param opaque lzma_allocator.opaque (see below)
+ * \param nmemb Number of elements like in calloc(). liblzma
+ * will always set nmemb to 1, so it is safe to
+ * ignore nmemb in a custom allocator if you like.
+ * The nmemb argument exists only for
+ * compatibility with zlib and libbzip2.
+ * \param size Size of an element in bytes.
+ * liblzma never sets this to zero.
+ *
+ * \return Pointer to the beginning of a memory block of
+ * `size' bytes, or NULL if allocation fails
+ * for some reason. When allocation fails, functions
+ * of liblzma return LZMA_MEM_ERROR.
+ *
+ * The allocator should not waste time zeroing the allocated buffers.
+ * This is not only about speed, but also memory usage, since the
+ * operating system kernel doesn't necessarily allocate the requested
+ * memory in physical memory until it is actually used. With small
+ * input files, liblzma may actually need only a fraction of the
+ * memory that it requested for allocation.
+ *
+ * \note LZMA_MEM_ERROR is also used when the size of the
+ * allocation would be greater than SIZE_MAX. Thus,
+ * don't assume that the custom allocator must have
+ * returned NULL if some function from liblzma
+ * returns LZMA_MEM_ERROR.
+ */
+ void *(LZMA_API_CALL *alloc)(void *opaque, size_t nmemb, size_t size);
+
+ /**
+ * \brief Pointer to a custom memory freeing function
+ *
+ * If you don't want a custom freeing function, but still
+ * want a custom allocator, set this to NULL and liblzma
+ * will use the standard free().
+ *
+ * \param opaque lzma_allocator.opaque (see below)
+ * \param ptr Pointer returned by lzma_allocator.alloc(),
+ * or when it is set to NULL, a pointer returned
+ * by the standard malloc().
+ */
+ void (LZMA_API_CALL *free)(void *opaque, void *ptr);
+
+ /**
+ * \brief Pointer passed to .alloc() and .free()
+ *
+ * opaque is passed as the first argument to lzma_allocator.alloc()
+ * and lzma_allocator.free(). This intended to ease implementing
+ * custom memory allocation functions for use with liblzma.
+ *
+ * If you don't need this, you should set this to NULL.
+ */
+ void *opaque;
+
+} lzma_allocator;
+
+
+/**
+ * \brief Internal data structure
+ *
+ * The contents of this structure is not visible outside the library.
+ */
+typedef struct lzma_internal_s lzma_internal;
+
+
+/**
+ * \brief Passing data to and from liblzma
+ *
+ * The lzma_stream structure is used for
+ * - passing pointers to input and output buffers to liblzma;
+ * - defining custom memory handler functions; and
+ * - holding a pointer to coder-specific internal data structures.
+ *
+ * Typical usage:
+ *
+ * - After allocating lzma_stream (on stack or with malloc()), it must be
+ * initialized to LZMA_STREAM_INIT (see LZMA_STREAM_INIT for details).
+ *
+ * - Initialize a coder to the lzma_stream, for example by using
+ * lzma_easy_encoder() or lzma_auto_decoder(). Some notes:
+ * - In contrast to zlib, strm->next_in and strm->next_out are
+ * ignored by all initialization functions, thus it is safe
+ * to not initialize them yet.
+ * - The initialization functions always set strm->total_in and
+ * strm->total_out to zero.
+ * - If the initialization function fails, no memory is left allocated
+ * that would require freeing with lzma_end() even if some memory was
+ * associated with the lzma_stream structure when the initialization
+ * function was called.
+ *
+ * - Use lzma_code() to do the actual work.
+ *
+ * - Once the coding has been finished, the existing lzma_stream can be
+ * reused. It is OK to reuse lzma_stream with different initialization
+ * function without calling lzma_end() first. Old allocations are
+ * automatically freed.
+ *
+ * - Finally, use lzma_end() to free the allocated memory. lzma_end() never
+ * frees the lzma_stream structure itself.
+ *
+ * Application may modify the values of total_in and total_out as it wants.
+ * They are updated by liblzma to match the amount of data read and
+ * written but aren't used for anything else except as a possible return
+ * values from lzma_get_progress().
+ */
+typedef struct {
+ const uint8_t *next_in; /**< Pointer to the next input byte. */
+ size_t avail_in; /**< Number of available input bytes in next_in. */
+ uint64_t total_in; /**< Total number of bytes read by liblzma. */
+
+ uint8_t *next_out; /**< Pointer to the next output position. */
+ size_t avail_out; /**< Amount of free space in next_out. */
+ uint64_t total_out; /**< Total number of bytes written by liblzma. */
+
+ /**
+ * \brief Custom memory allocation functions
+ *
+ * In most cases this is NULL which makes liblzma use
+ * the standard malloc() and free().
+ *
+ * \note In 5.0.x this is not a const pointer.
+ */
+ const lzma_allocator *allocator;
+
+ /** Internal state is not visible to applications. */
+ lzma_internal *internal;
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. Excluding the initialization of this structure,
+ * you should not touch these, because the names of these variables
+ * may change.
+ */
+
+ /** \private Reserved member. */
+ void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ void *reserved_ptr2;
+
+ /** \private Reserved member. */
+ void *reserved_ptr3;
+
+ /** \private Reserved member. */
+ void *reserved_ptr4;
+
+ /**
+ * \brief New seek input position for LZMA_SEEK_NEEDED
+ *
+ * When lzma_code() returns LZMA_SEEK_NEEDED, the new input position
+ * needed by liblzma will be available seek_pos. The value is
+ * guaranteed to not exceed the file size that was specified when
+ * this lzma_stream was initialized.
+ *
+ * In all other situations the value of this variable is undefined.
+ */
+ uint64_t seek_pos;
+
+ /** \private Reserved member. */
+ uint64_t reserved_int2;
+
+ /** \private Reserved member. */
+ size_t reserved_int3;
+
+ /** \private Reserved member. */
+ size_t reserved_int4;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum1;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum2;
+
+} lzma_stream;
+
+
+/**
+ * \brief Initialization for lzma_stream
+ *
+ * When you declare an instance of lzma_stream, you can immediately
+ * initialize it so that initialization functions know that no memory
+ * has been allocated yet:
+ *
+ * lzma_stream strm = LZMA_STREAM_INIT;
+ *
+ * If you need to initialize a dynamically allocated lzma_stream, you can use
+ * memset(strm_pointer, 0, sizeof(lzma_stream)). Strictly speaking, this
+ * violates the C standard since NULL may have different internal
+ * representation than zero, but it should be portable enough in practice.
+ * Anyway, for maximum portability, you can use something like this:
+ *
+ * lzma_stream tmp = LZMA_STREAM_INIT;
+ * *strm = tmp;
+ */
+#define LZMA_STREAM_INIT \
+ { NULL, 0, 0, NULL, 0, 0, NULL, NULL, \
+ NULL, NULL, NULL, NULL, 0, 0, 0, 0, \
+ LZMA_RESERVED_ENUM, LZMA_RESERVED_ENUM }
+
+
+/**
+ * \brief Encode or decode data
+ *
+ * Once the lzma_stream has been successfully initialized (e.g. with
+ * lzma_stream_encoder()), the actual encoding or decoding is done
+ * using this function. The application has to update strm->next_in,
+ * strm->avail_in, strm->next_out, and strm->avail_out to pass input
+ * to and get output from liblzma.
+ *
+ * See the description of the coder-specific initialization function to find
+ * out what `action' values are supported by the coder.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param action Action for this function to take. Must be a valid
+ * lzma_action enum value.
+ *
+ * \return Any valid lzma_ret. See the lzma_ret enum description for more
+ * information.
+ */
+extern LZMA_API(lzma_ret) lzma_code(lzma_stream *strm, lzma_action action)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Free memory allocated for the coder data structures
+ *
+ * After lzma_end(strm), strm->internal is guaranteed to be NULL. No other
+ * members of the lzma_stream structure are touched.
+ *
+ * \note zlib indicates an error if application end()s unfinished
+ * stream structure. liblzma doesn't do this, and assumes that
+ * application knows what it is doing.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ */
+extern LZMA_API(void) lzma_end(lzma_stream *strm) lzma_nothrow;
+
+
+/**
+ * \brief Get progress information
+ *
+ * In single-threaded mode, applications can get progress information from
+ * strm->total_in and strm->total_out. In multi-threaded mode this is less
+ * useful because a significant amount of both input and output data gets
+ * buffered internally by liblzma. This makes total_in and total_out give
+ * misleading information and also makes the progress indicator updates
+ * non-smooth.
+ *
+ * This function gives realistic progress information also in multi-threaded
+ * mode by taking into account the progress made by each thread. In
+ * single-threaded mode *progress_in and *progress_out are set to
+ * strm->total_in and strm->total_out, respectively.
+ *
+ * \param strm Pointer to lzma_stream that is at least
+ * initialized with LZMA_STREAM_INIT.
+ * \param[out] progress_in Pointer to the number of input bytes processed.
+ * \param[out] progress_out Pointer to the number of output bytes processed.
+ */
+extern LZMA_API(void) lzma_get_progress(lzma_stream *strm,
+ uint64_t *progress_in, uint64_t *progress_out) lzma_nothrow;
+
+
+/**
+ * \brief Get the memory usage of decoder filter chain
+ *
+ * This function is currently supported only when *strm has been initialized
+ * with a function that takes a memlimit argument. With other functions, you
+ * should use e.g. lzma_raw_encoder_memusage() or lzma_raw_decoder_memusage()
+ * to estimate the memory requirements.
+ *
+ * This function is useful e.g. after LZMA_MEMLIMIT_ERROR to find out how big
+ * the memory usage limit should have been to decode the input. Note that
+ * this may give misleading information if decoding .xz Streams that have
+ * multiple Blocks, because each Block can have different memory requirements.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ *
+ * \return How much memory is currently allocated for the filter
+ * decoders. If no filter chain is currently allocated,
+ * some non-zero value is still returned, which is less than
+ * or equal to what any filter chain would indicate as its
+ * memory requirement.
+ *
+ * If this function isn't supported by *strm or some other error
+ * occurs, zero is returned.
+ */
+extern LZMA_API(uint64_t) lzma_memusage(const lzma_stream *strm)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the current memory usage limit
+ *
+ * This function is supported only when *strm has been initialized with
+ * a function that takes a memlimit argument.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ *
+ * \return On success, the current memory usage limit is returned
+ * (always non-zero). On error, zero is returned.
+ */
+extern LZMA_API(uint64_t) lzma_memlimit_get(const lzma_stream *strm)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Set the memory usage limit
+ *
+ * This function is supported only when *strm has been initialized with
+ * a function that takes a memlimit argument.
+ *
+ * liblzma 5.2.3 and earlier has a bug where memlimit value of 0 causes
+ * this function to do nothing (leaving the limit unchanged) and still
+ * return LZMA_OK. Later versions treat 0 as if 1 had been specified (so
+ * lzma_memlimit_get() will return 1 even if you specify 0 here).
+ *
+ * liblzma 5.2.6 and earlier had a bug in single-threaded .xz decoder
+ * (lzma_stream_decoder()) which made it impossible to continue decoding
+ * after LZMA_MEMLIMIT_ERROR even if the limit was increased using
+ * lzma_memlimit_set(). Other decoders worked correctly.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: New memory usage limit successfully set.
+ * - LZMA_MEMLIMIT_ERROR: The new limit is too small.
+ * The limit was not changed.
+ * - LZMA_PROG_ERROR: Invalid arguments, e.g. *strm doesn't
+ * support memory usage limit.
+ */
+extern LZMA_API(lzma_ret) lzma_memlimit_set(
+ lzma_stream *strm, uint64_t memlimit) lzma_nothrow;
diff --git a/src/liblzma/api/lzma/bcj.h b/src/liblzma/api/lzma/bcj.h
new file mode 100644
index 0000000..0c84e0c
--- /dev/null
+++ b/src/liblzma/api/lzma/bcj.h
@@ -0,0 +1,94 @@
+/**
+ * \file lzma/bcj.h
+ * \brief Branch/Call/Jump conversion filters
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/* Filter IDs for lzma_filter.id */
+
+/**
+ * \brief Filter for x86 binaries
+ */
+#define LZMA_FILTER_X86 LZMA_VLI_C(0x04)
+
+/**
+ * \brief Filter for Big endian PowerPC binaries
+ */
+#define LZMA_FILTER_POWERPC LZMA_VLI_C(0x05)
+
+/**
+ * \brief Filter for IA-64 (Itanium) binaries
+ */
+#define LZMA_FILTER_IA64 LZMA_VLI_C(0x06)
+
+/**
+ * \brief Filter for ARM binaries
+ */
+#define LZMA_FILTER_ARM LZMA_VLI_C(0x07)
+
+/**
+ * \brief Filter for ARM-Thumb binaries
+ */
+#define LZMA_FILTER_ARMTHUMB LZMA_VLI_C(0x08)
+
+/**
+ * \brief Filter for SPARC binaries
+ */
+#define LZMA_FILTER_SPARC LZMA_VLI_C(0x09)
+
+/**
+ * \brief Filter for ARM64 binaries
+ */
+#define LZMA_FILTER_ARM64 LZMA_VLI_C(0x0A)
+
+
+/**
+ * \brief Options for BCJ filters
+ *
+ * The BCJ filters never change the size of the data. Specifying options
+ * for them is optional: if pointer to options is NULL, default value is
+ * used. You probably never need to specify options to BCJ filters, so just
+ * set the options pointer to NULL and be happy.
+ *
+ * If options with non-default values have been specified when encoding,
+ * the same options must also be specified when decoding.
+ *
+ * \note At the moment, none of the BCJ filters support
+ * LZMA_SYNC_FLUSH. If LZMA_SYNC_FLUSH is specified,
+ * LZMA_OPTIONS_ERROR will be returned. If there is need,
+ * partial support for LZMA_SYNC_FLUSH can be added in future.
+ * Partial means that flushing would be possible only at
+ * offsets that are multiple of 2, 4, or 16 depending on
+ * the filter, except x86 which cannot be made to support
+ * LZMA_SYNC_FLUSH predictably.
+ */
+typedef struct {
+ /**
+ * \brief Start offset for conversions
+ *
+ * This setting is useful only when the same filter is used
+ * _separately_ for multiple sections of the same executable file,
+ * and the sections contain cross-section branch/call/jump
+ * instructions. In that case it is beneficial to set the start
+ * offset of the non-first sections so that the relative addresses
+ * of the cross-section branch/call/jump instructions will use the
+ * same absolute addresses as in the first section.
+ *
+ * When the pointer to options is NULL, the default value (zero)
+ * is used.
+ */
+ uint32_t start_offset;
+
+} lzma_options_bcj;
diff --git a/src/liblzma/api/lzma/block.h b/src/liblzma/api/lzma/block.h
new file mode 100644
index 0000000..ec5e77a
--- /dev/null
+++ b/src/liblzma/api/lzma/block.h
@@ -0,0 +1,695 @@
+/**
+ * \file lzma/block.h
+ * \brief .xz Block handling
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Options for the Block and Block Header encoders and decoders
+ *
+ * Different Block handling functions use different parts of this structure.
+ * Some read some members, other functions write, and some do both. Only the
+ * members listed for reading need to be initialized when the specified
+ * functions are called. The members marked for writing will be assigned
+ * new values at some point either by calling the given function or by
+ * later calls to lzma_code().
+ */
+typedef struct {
+ /**
+ * \brief Block format version
+ *
+ * To prevent API and ABI breakages when new features are needed,
+ * a version number is used to indicate which members in this
+ * structure are in use:
+ * - liblzma >= 5.0.0: version = 0 is supported.
+ * - liblzma >= 5.1.4beta: Support for version = 1 was added,
+ * which adds the ignore_check member.
+ *
+ * If version is greater than one, most Block related functions
+ * will return LZMA_OPTIONS_ERROR (lzma_block_header_decode() works
+ * with any version value).
+ *
+ * Read by:
+ * - lzma_block_header_size()
+ * - lzma_block_header_encode()
+ * - lzma_block_header_decode()
+ * - lzma_block_compressed_size()
+ * - lzma_block_unpadded_size()
+ * - lzma_block_total_size()
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_uncomp_encode()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by:
+ * - lzma_block_header_decode()
+ */
+ uint32_t version;
+
+ /**
+ * \brief Size of the Block Header field in bytes
+ *
+ * This is always a multiple of four.
+ *
+ * Read by:
+ * - lzma_block_header_encode()
+ * - lzma_block_header_decode()
+ * - lzma_block_compressed_size()
+ * - lzma_block_unpadded_size()
+ * - lzma_block_total_size()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by:
+ * - lzma_block_header_size()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_uncomp_encode()
+ */
+ uint32_t header_size;
+# define LZMA_BLOCK_HEADER_SIZE_MIN 8
+# define LZMA_BLOCK_HEADER_SIZE_MAX 1024
+
+ /**
+ * \brief Type of integrity Check
+ *
+ * The Check ID is not stored into the Block Header, thus its value
+ * must be provided also when decoding.
+ *
+ * Read by:
+ * - lzma_block_header_encode()
+ * - lzma_block_header_decode()
+ * - lzma_block_compressed_size()
+ * - lzma_block_unpadded_size()
+ * - lzma_block_total_size()
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_buffer_decode()
+ */
+ lzma_check check;
+
+ /**
+ * \brief Size of the Compressed Data in bytes
+ *
+ * Encoding: If this is not LZMA_VLI_UNKNOWN, Block Header encoder
+ * will store this value to the Block Header. Block encoder doesn't
+ * care about this value, but will set it once the encoding has been
+ * finished.
+ *
+ * Decoding: If this is not LZMA_VLI_UNKNOWN, Block decoder will
+ * verify that the size of the Compressed Data field matches
+ * compressed_size.
+ *
+ * Usually you don't know this value when encoding in streamed mode,
+ * and thus cannot write this field into the Block Header.
+ *
+ * In non-streamed mode you can reserve space for this field before
+ * encoding the actual Block. After encoding the data, finish the
+ * Block by encoding the Block Header. Steps in detail:
+ *
+ * - Set compressed_size to some big enough value. If you don't know
+ * better, use LZMA_VLI_MAX, but remember that bigger values take
+ * more space in Block Header.
+ *
+ * - Call lzma_block_header_size() to see how much space you need to
+ * reserve for the Block Header.
+ *
+ * - Encode the Block using lzma_block_encoder() and lzma_code().
+ * It sets compressed_size to the correct value.
+ *
+ * - Use lzma_block_header_encode() to encode the Block Header.
+ * Because space was reserved in the first step, you don't need
+ * to call lzma_block_header_size() anymore, because due to
+ * reserving, header_size has to be big enough. If it is "too big",
+ * lzma_block_header_encode() will add enough Header Padding to
+ * make Block Header to match the size specified by header_size.
+ *
+ * Read by:
+ * - lzma_block_header_size()
+ * - lzma_block_header_encode()
+ * - lzma_block_compressed_size()
+ * - lzma_block_unpadded_size()
+ * - lzma_block_total_size()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by:
+ * - lzma_block_header_decode()
+ * - lzma_block_compressed_size()
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_uncomp_encode()
+ * - lzma_block_buffer_decode()
+ */
+ lzma_vli compressed_size;
+
+ /**
+ * \brief Uncompressed Size in bytes
+ *
+ * This is handled very similarly to compressed_size above.
+ *
+ * uncompressed_size is needed by fewer functions than
+ * compressed_size. This is because uncompressed_size isn't
+ * needed to validate that Block stays within proper limits.
+ *
+ * Read by:
+ * - lzma_block_header_size()
+ * - lzma_block_header_encode()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by:
+ * - lzma_block_header_decode()
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_uncomp_encode()
+ * - lzma_block_buffer_decode()
+ */
+ lzma_vli uncompressed_size;
+
+ /**
+ * \brief Array of filters
+ *
+ * There can be 1-4 filters. The end of the array is marked with
+ * .id = LZMA_VLI_UNKNOWN.
+ *
+ * Read by:
+ * - lzma_block_header_size()
+ * - lzma_block_header_encode()
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by:
+ * - lzma_block_header_decode(): Note that this does NOT free()
+ * the old filter options structures. All unused filters[] will
+ * have .id == LZMA_VLI_UNKNOWN and .options == NULL. If
+ * decoding fails, all filters[] are guaranteed to be
+ * LZMA_VLI_UNKNOWN and NULL.
+ *
+ * \note Because of the array is terminated with
+ * .id = LZMA_VLI_UNKNOWN, the actual array must
+ * have LZMA_FILTERS_MAX + 1 members or the Block
+ * Header decoder will overflow the buffer.
+ */
+ lzma_filter *filters;
+
+ /**
+ * \brief Raw value stored in the Check field
+ *
+ * After successful coding, the first lzma_check_size(check) bytes
+ * of this array contain the raw value stored in the Check field.
+ *
+ * Note that CRC32 and CRC64 are stored in little endian byte order.
+ * Take it into account if you display the Check values to the user.
+ *
+ * Written by:
+ * - lzma_block_encoder()
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_encode()
+ * - lzma_block_uncomp_encode()
+ * - lzma_block_buffer_decode()
+ */
+ uint8_t raw_check[LZMA_CHECK_SIZE_MAX];
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. You should not touch these, because the names
+ * of these variables may change. These are and will never be used
+ * with the currently supported options, so it is safe to leave these
+ * uninitialized.
+ */
+
+ /** \private Reserved member. */
+ void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ void *reserved_ptr2;
+
+ /** \private Reserved member. */
+ void *reserved_ptr3;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int1;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int2;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int3;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int4;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int5;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int6;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int7;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_int8;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum1;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum2;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum3;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum4;
+
+ /**
+ * \brief A flag to Block decoder to not verify the Check field
+ *
+ * This member is supported by liblzma >= 5.1.4beta if .version >= 1.
+ *
+ * If this is set to true, the integrity check won't be calculated
+ * and verified. Unless you know what you are doing, you should
+ * leave this to false. (A reason to set this to true is when the
+ * file integrity is verified externally anyway and you want to
+ * speed up the decompression, which matters mostly when using
+ * SHA-256 as the integrity check.)
+ *
+ * If .version >= 1, read by:
+ * - lzma_block_decoder()
+ * - lzma_block_buffer_decode()
+ *
+ * Written by (.version is ignored):
+ * - lzma_block_header_decode() always sets this to false
+ */
+ lzma_bool ignore_check;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool2;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool3;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool4;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool5;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool6;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool7;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool8;
+
+} lzma_block;
+
+
+/**
+ * \brief Decode the Block Header Size field
+ *
+ * To decode Block Header using lzma_block_header_decode(), the size of the
+ * Block Header has to be known and stored into lzma_block.header_size.
+ * The size can be calculated from the first byte of a Block using this macro.
+ * Note that if the first byte is 0x00, it indicates beginning of Index; use
+ * this macro only when the byte is not 0x00.
+ *
+ * There is no encoding macro because lzma_block_header_size() and
+ * lzma_block_header_encode() should be used.
+ */
+#define lzma_block_header_size_decode(b) (((uint32_t)(b) + 1) * 4)
+
+
+/**
+ * \brief Calculate Block Header Size
+ *
+ * Calculate the minimum size needed for the Block Header field using the
+ * settings specified in the lzma_block structure. Note that it is OK to
+ * increase the calculated header_size value as long as it is a multiple of
+ * four and doesn't exceed LZMA_BLOCK_HEADER_SIZE_MAX. Increasing header_size
+ * just means that lzma_block_header_encode() will add Header Padding.
+ *
+ * \note This doesn't check that all the options are valid i.e. this
+ * may return LZMA_OK even if lzma_block_header_encode() or
+ * lzma_block_encoder() would fail. If you want to validate the
+ * filter chain, consider using lzma_memlimit_encoder() which as
+ * a side-effect validates the filter chain.
+ *
+ * \param block Block options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Size calculated successfully and stored to
+ * block->header_size.
+ * - LZMA_OPTIONS_ERROR: Unsupported version, filters or
+ * filter options.
+ * - LZMA_PROG_ERROR: Invalid values like compressed_size == 0.
+ */
+extern LZMA_API(lzma_ret) lzma_block_header_size(lzma_block *block)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Encode Block Header
+ *
+ * The caller must have calculated the size of the Block Header already with
+ * lzma_block_header_size(). If a value larger than the one calculated by
+ * lzma_block_header_size() is used, the Block Header will be padded to the
+ * specified size.
+ *
+ * \param block Block options to be encoded.
+ * \param[out] out Beginning of the output buffer. This must be
+ * at least block->header_size bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful. block->header_size
+ * bytes were written to output buffer.
+ * - LZMA_OPTIONS_ERROR: Invalid or unsupported options.
+ * - LZMA_PROG_ERROR: Invalid arguments, for example
+ * block->header_size is invalid or block->filters is NULL.
+ */
+extern LZMA_API(lzma_ret) lzma_block_header_encode(
+ const lzma_block *block, uint8_t *out)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode Block Header
+ *
+ * block->version should (usually) be set to the highest value supported
+ * by the application. If the application sets block->version to a value
+ * higher than supported by the current liblzma version, this function will
+ * downgrade block->version to the highest value supported by it. Thus one
+ * should check the value of block->version after calling this function if
+ * block->version was set to a non-zero value and the application doesn't
+ * otherwise know that the liblzma version being used is new enough to
+ * support the specified block->version.
+ *
+ * The size of the Block Header must have already been decoded with
+ * lzma_block_header_size_decode() macro and stored to block->header_size.
+ *
+ * The integrity check type from Stream Header must have been stored
+ * to block->check.
+ *
+ * block->filters must have been allocated, but they don't need to be
+ * initialized (possible existing filter options are not freed).
+ *
+ * \param[out] block Destination for Block options
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() (and also free()
+ * if an error occurs).
+ * \param in Beginning of the input buffer. This must be
+ * at least block->header_size bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful. block->header_size
+ * bytes were read from the input buffer.
+ * - LZMA_OPTIONS_ERROR: The Block Header specifies some
+ * unsupported options such as unsupported filters. This can
+ * happen also if block->version was set to a too low value
+ * compared to what would be required to properly represent
+ * the information stored in the Block Header.
+ * - LZMA_DATA_ERROR: Block Header is corrupt, for example,
+ * the CRC32 doesn't match.
+ * - LZMA_PROG_ERROR: Invalid arguments, for example
+ * block->header_size is invalid or block->filters is NULL.
+ */
+extern LZMA_API(lzma_ret) lzma_block_header_decode(lzma_block *block,
+ const lzma_allocator *allocator, const uint8_t *in)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Validate and set Compressed Size according to Unpadded Size
+ *
+ * Block Header stores Compressed Size, but Index has Unpadded Size. If the
+ * application has already parsed the Index and is now decoding Blocks,
+ * it can calculate Compressed Size from Unpadded Size. This function does
+ * exactly that with error checking:
+ *
+ * - Compressed Size calculated from Unpadded Size must be positive integer,
+ * that is, Unpadded Size must be big enough that after Block Header and
+ * Check fields there's still at least one byte for Compressed Size.
+ *
+ * - If Compressed Size was present in Block Header, the new value
+ * calculated from Unpadded Size is compared against the value
+ * from Block Header.
+ *
+ * \note This function must be called _after_ decoding the Block Header
+ * field so that it can properly validate Compressed Size if it
+ * was present in Block Header.
+ *
+ * \param block Block options: block->header_size must
+ * already be set with lzma_block_header_size().
+ * \param unpadded_size Unpadded Size from the Index field in bytes
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: block->compressed_size was set successfully.
+ * - LZMA_DATA_ERROR: unpadded_size is too small compared to
+ * block->header_size and lzma_check_size(block->check).
+ * - LZMA_PROG_ERROR: Some values are invalid. For example,
+ * block->header_size must be a multiple of four and
+ * between 8 and 1024 inclusive.
+ */
+extern LZMA_API(lzma_ret) lzma_block_compressed_size(
+ lzma_block *block, lzma_vli unpadded_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Calculate Unpadded Size
+ *
+ * The Index field stores Unpadded Size and Uncompressed Size. The latter
+ * can be taken directly from the lzma_block structure after coding a Block,
+ * but Unpadded Size needs to be calculated from Block Header Size,
+ * Compressed Size, and size of the Check field. This is where this function
+ * is needed.
+ *
+ * \param block Block options: block->header_size must already be
+ * set with lzma_block_header_size().
+ *
+ * \return Unpadded Size on success, or zero on error.
+ */
+extern LZMA_API(lzma_vli) lzma_block_unpadded_size(const lzma_block *block)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Calculate the total encoded size of a Block
+ *
+ * This is equivalent to lzma_block_unpadded_size() except that the returned
+ * value includes the size of the Block Padding field.
+ *
+ * \param block Block options: block->header_size must already be
+ * set with lzma_block_header_size().
+ *
+ * \return On success, total encoded size of the Block. On error,
+ * zero is returned.
+ */
+extern LZMA_API(lzma_vli) lzma_block_total_size(const lzma_block *block)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Initialize .xz Block encoder
+ *
+ * Valid actions for lzma_code() are LZMA_RUN, LZMA_SYNC_FLUSH (only if the
+ * filter chain supports it), and LZMA_FINISH.
+ *
+ * The Block encoder encodes the Block Data, Block Padding, and Check value.
+ * It does NOT encode the Block Header which can be encoded with
+ * lzma_block_header_encode().
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param block Block options: block->version, block->check,
+ * and block->filters must have been initialized.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: All good, continue with lzma_code().
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_UNSUPPORTED_CHECK: block->check specifies a Check ID
+ * that is not supported by this build of liblzma. Initializing
+ * the encoder failed.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_block_encoder(
+ lzma_stream *strm, lzma_block *block)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .xz Block decoder
+ *
+ * Valid actions for lzma_code() are LZMA_RUN and LZMA_FINISH. Using
+ * LZMA_FINISH is not required. It is supported only for convenience.
+ *
+ * The Block decoder decodes the Block Data, Block Padding, and Check value.
+ * It does NOT decode the Block Header which can be decoded with
+ * lzma_block_header_decode().
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param block Block options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: All good, continue with lzma_code().
+ * - LZMA_PROG_ERROR
+ * - LZMA_MEM_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_block_decoder(
+ lzma_stream *strm, lzma_block *block)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Calculate maximum output size for single-call Block encoding
+ *
+ * This is equivalent to lzma_stream_buffer_bound() but for .xz Blocks.
+ * See the documentation of lzma_stream_buffer_bound().
+ *
+ * \param uncompressed_size Size of the data to be encoded with the
+ * single-call Block encoder.
+ *
+ * \return Maximum output size in bytes for single-call Block encoding.
+ */
+extern LZMA_API(size_t) lzma_block_buffer_bound(size_t uncompressed_size)
+ lzma_nothrow;
+
+
+/**
+ * \brief Single-call .xz Block encoder
+ *
+ * In contrast to the multi-call encoder initialized with
+ * lzma_block_encoder(), this function encodes also the Block Header. This
+ * is required to make it possible to write appropriate Block Header also
+ * in case the data isn't compressible, and different filter chain has to be
+ * used to encode the data in uncompressed form using uncompressed chunks
+ * of the LZMA2 filter.
+ *
+ * When the data isn't compressible, header_size, compressed_size, and
+ * uncompressed_size are set just like when the data was compressible, but
+ * it is possible that header_size is too small to hold the filter chain
+ * specified in block->filters, because that isn't necessarily the filter
+ * chain that was actually used to encode the data. lzma_block_unpadded_size()
+ * still works normally, because it doesn't read the filters array.
+ *
+ * \param block Block options: block->version, block->check,
+ * and block->filters must have been initialized.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_size Size of the input buffer
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_block_buffer_encode(
+ lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Single-call uncompressed .xz Block encoder
+ *
+ * This is like lzma_block_buffer_encode() except this doesn't try to
+ * compress the data and instead encodes the data using LZMA2 uncompressed
+ * chunks. The required output buffer size can be determined with
+ * lzma_block_buffer_bound().
+ *
+ * Since the data won't be compressed, this function ignores block->filters.
+ * This function doesn't take lzma_allocator because this function doesn't
+ * allocate any memory from the heap.
+ *
+ * \param block Block options: block->version, block->check,
+ * and block->filters must have been initialized.
+ * \param in Beginning of the input buffer
+ * \param in_size Size of the input buffer
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_block_uncomp_encode(lzma_block *block,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Single-call .xz Block decoder
+ *
+ * This is single-call equivalent of lzma_block_decoder(), and requires that
+ * the caller has already decoded Block Header and checked its memory usage.
+ *
+ * \param block Block options
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_pos The next byte will be read from in[*in_pos].
+ * *in_pos is updated only if decoding succeeds.
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_BUF_ERROR: Output buffer was too small.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_block_buffer_decode(
+ lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow;
diff --git a/src/liblzma/api/lzma/check.h b/src/liblzma/api/lzma/check.h
new file mode 100644
index 0000000..b37197d
--- /dev/null
+++ b/src/liblzma/api/lzma/check.h
@@ -0,0 +1,164 @@
+/**
+ * \file lzma/check.h
+ * \brief Integrity checks
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Type of the integrity check (Check ID)
+ *
+ * The .xz format supports multiple types of checks that are calculated
+ * from the uncompressed data. They vary in both speed and ability to
+ * detect errors.
+ */
+typedef enum {
+ LZMA_CHECK_NONE = 0,
+ /**<
+ * No Check is calculated.
+ *
+ * Size of the Check field: 0 bytes
+ */
+
+ LZMA_CHECK_CRC32 = 1,
+ /**<
+ * CRC32 using the polynomial from the IEEE 802.3 standard
+ *
+ * Size of the Check field: 4 bytes
+ */
+
+ LZMA_CHECK_CRC64 = 4,
+ /**<
+ * CRC64 using the polynomial from the ECMA-182 standard
+ *
+ * Size of the Check field: 8 bytes
+ */
+
+ LZMA_CHECK_SHA256 = 10
+ /**<
+ * SHA-256
+ *
+ * Size of the Check field: 32 bytes
+ */
+} lzma_check;
+
+
+/**
+ * \brief Maximum valid Check ID
+ *
+ * The .xz file format specification specifies 16 Check IDs (0-15). Some
+ * of them are only reserved, that is, no actual Check algorithm has been
+ * assigned. When decoding, liblzma still accepts unknown Check IDs for
+ * future compatibility. If a valid but unsupported Check ID is detected,
+ * liblzma can indicate a warning; see the flags LZMA_TELL_NO_CHECK,
+ * LZMA_TELL_UNSUPPORTED_CHECK, and LZMA_TELL_ANY_CHECK in container.h.
+ */
+#define LZMA_CHECK_ID_MAX 15
+
+
+/**
+ * \brief Test if the given Check ID is supported
+ *
+ * LZMA_CHECK_NONE and LZMA_CHECK_CRC32 are always supported (even if
+ * liblzma is built with limited features).
+ *
+ * \note It is safe to call this with a value that is not in the
+ * range [0, 15]; in that case the return value is always false.
+ *
+ * \param check Check ID
+ *
+ * \return lzma_bool:
+ * - true if Check ID is supported by this liblzma build.
+ * - false otherwise.
+ */
+extern LZMA_API(lzma_bool) lzma_check_is_supported(lzma_check check)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Get the size of the Check field with the given Check ID
+ *
+ * Although not all Check IDs have a check algorithm associated, the size of
+ * every Check is already frozen. This function returns the size (in bytes) of
+ * the Check field with the specified Check ID. The values are:
+ * { 0, 4, 4, 4, 8, 8, 8, 16, 16, 16, 32, 32, 32, 64, 64, 64 }
+ *
+ * \param check Check ID
+ *
+ * \return Size of the Check field in bytes. If the argument is not in
+ * the range [0, 15], UINT32_MAX is returned.
+ */
+extern LZMA_API(uint32_t) lzma_check_size(lzma_check check)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Maximum size of a Check field
+ */
+#define LZMA_CHECK_SIZE_MAX 64
+
+
+/**
+ * \brief Calculate CRC32
+ *
+ * Calculate CRC32 using the polynomial from the IEEE 802.3 standard.
+ *
+ * \param buf Pointer to the input buffer
+ * \param size Size of the input buffer
+ * \param crc Previously returned CRC value. This is used to
+ * calculate the CRC of a big buffer in smaller chunks.
+ * Set to zero when starting a new calculation.
+ *
+ * \return Updated CRC value, which can be passed to this function
+ * again to continue CRC calculation.
+ */
+extern LZMA_API(uint32_t) lzma_crc32(
+ const uint8_t *buf, size_t size, uint32_t crc)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Calculate CRC64
+ *
+ * Calculate CRC64 using the polynomial from the ECMA-182 standard.
+ *
+ * This function is used similarly to lzma_crc32().
+ *
+ * \param buf Pointer to the input buffer
+ * \param size Size of the input buffer
+ * \param crc Previously returned CRC value. This is used to
+ * calculate the CRC of a big buffer in smaller chunks.
+ * Set to zero when starting a new calculation.
+ *
+ * \return Updated CRC value, which can be passed to this function
+ * again to continue CRC calculation.
+ */
+extern LZMA_API(uint64_t) lzma_crc64(
+ const uint8_t *buf, size_t size, uint64_t crc)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the type of the integrity check
+ *
+ * This function can be called only immediately after lzma_code() has
+ * returned LZMA_NO_CHECK, LZMA_UNSUPPORTED_CHECK, or LZMA_GET_CHECK.
+ * Calling this function in any other situation has undefined behavior.
+ *
+ * \param strm Pointer to lzma_stream meeting the above conditions.
+ *
+ * \return Check ID in the lzma_stream, or undefined if called improperly.
+ */
+extern LZMA_API(lzma_check) lzma_get_check(const lzma_stream *strm)
+ lzma_nothrow;
diff --git a/src/liblzma/api/lzma/container.h b/src/liblzma/api/lzma/container.h
new file mode 100644
index 0000000..2849fbf
--- /dev/null
+++ b/src/liblzma/api/lzma/container.h
@@ -0,0 +1,968 @@
+/**
+ * \file lzma/container.h
+ * \brief File formats
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/************
+ * Encoding *
+ ************/
+
+/**
+ * \brief Default compression preset
+ *
+ * It's not straightforward to recommend a default preset, because in some
+ * cases keeping the resource usage relatively low is more important that
+ * getting the maximum compression ratio.
+ */
+#define LZMA_PRESET_DEFAULT UINT32_C(6)
+
+
+/**
+ * \brief Mask for preset level
+ *
+ * This is useful only if you need to extract the level from the preset
+ * variable. That should be rare.
+ */
+#define LZMA_PRESET_LEVEL_MASK UINT32_C(0x1F)
+
+
+/*
+ * Preset flags
+ *
+ * Currently only one flag is defined.
+ */
+
+/**
+ * \brief Extreme compression preset
+ *
+ * This flag modifies the preset to make the encoding significantly slower
+ * while improving the compression ratio only marginally. This is useful
+ * when you don't mind spending time to get as small result as possible.
+ *
+ * This flag doesn't affect the memory usage requirements of the decoder (at
+ * least not significantly). The memory usage of the encoder may be increased
+ * a little but only at the lowest preset levels (0-3).
+ */
+#define LZMA_PRESET_EXTREME (UINT32_C(1) << 31)
+
+
+/**
+ * \brief Multithreading options
+ */
+typedef struct {
+ /**
+ * \brief Flags
+ *
+ * Set this to zero if no flags are wanted.
+ *
+ * Encoder: No flags are currently supported.
+ *
+ * Decoder: Bitwise-or of zero or more of the decoder flags:
+ * - LZMA_TELL_NO_CHECK
+ * - LZMA_TELL_UNSUPPORTED_CHECK
+ * - LZMA_TELL_ANY_CHECK
+ * - LZMA_IGNORE_CHECK
+ * - LZMA_CONCATENATED
+ * - LZMA_FAIL_FAST
+ */
+ uint32_t flags;
+
+ /**
+ * \brief Number of worker threads to use
+ */
+ uint32_t threads;
+
+ /**
+ * \brief Encoder only: Maximum uncompressed size of a Block
+ *
+ * The encoder will start a new .xz Block every block_size bytes.
+ * Using LZMA_FULL_FLUSH or LZMA_FULL_BARRIER with lzma_code()
+ * the caller may tell liblzma to start a new Block earlier.
+ *
+ * With LZMA2, a recommended block size is 2-4 times the LZMA2
+ * dictionary size. With very small dictionaries, it is recommended
+ * to use at least 1 MiB block size for good compression ratio, even
+ * if this is more than four times the dictionary size. Note that
+ * these are only recommendations for typical use cases; feel free
+ * to use other values. Just keep in mind that using a block size
+ * less than the LZMA2 dictionary size is waste of RAM.
+ *
+ * Set this to 0 to let liblzma choose the block size depending
+ * on the compression options. For LZMA2 it will be 3*dict_size
+ * or 1 MiB, whichever is more.
+ *
+ * For each thread, about 3 * block_size bytes of memory will be
+ * allocated. This may change in later liblzma versions. If so,
+ * the memory usage will probably be reduced, not increased.
+ */
+ uint64_t block_size;
+
+ /**
+ * \brief Timeout to allow lzma_code() to return early
+ *
+ * Multithreading can make liblzma consume input and produce
+ * output in a very bursty way: it may first read a lot of input
+ * to fill internal buffers, then no input or output occurs for
+ * a while.
+ *
+ * In single-threaded mode, lzma_code() won't return until it has
+ * either consumed all the input or filled the output buffer. If
+ * this is done in multithreaded mode, it may cause a call
+ * lzma_code() to take even tens of seconds, which isn't acceptable
+ * in all applications.
+ *
+ * To avoid very long blocking times in lzma_code(), a timeout
+ * (in milliseconds) may be set here. If lzma_code() would block
+ * longer than this number of milliseconds, it will return with
+ * LZMA_OK. Reasonable values are 100 ms or more. The xz command
+ * line tool uses 300 ms.
+ *
+ * If long blocking times are acceptable, set timeout to a special
+ * value of 0. This will disable the timeout mechanism and will make
+ * lzma_code() block until all the input is consumed or the output
+ * buffer has been filled.
+ *
+ * \note Even with a timeout, lzma_code() might sometimes take
+ * a long time to return. No timing guarantees are made.
+ */
+ uint32_t timeout;
+
+ /**
+ * \brief Encoder only: Compression preset
+ *
+ * The preset is set just like with lzma_easy_encoder().
+ * The preset is ignored if filters below is non-NULL.
+ */
+ uint32_t preset;
+
+ /**
+ * \brief Encoder only: Filter chain (alternative to a preset)
+ *
+ * If this is NULL, the preset above is used. Otherwise the preset
+ * is ignored and the filter chain specified here is used.
+ */
+ const lzma_filter *filters;
+
+ /**
+ * \brief Encoder only: Integrity check type
+ *
+ * See check.h for available checks. The xz command line tool
+ * defaults to LZMA_CHECK_CRC64, which is a good choice if you
+ * are unsure.
+ */
+ lzma_check check;
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. You should not touch these, because the names
+ * of these variables may change. These are and will never be used
+ * with the currently supported options, so it is safe to leave these
+ * uninitialized.
+ */
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum1;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum2;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum3;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int1;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int2;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int3;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int4;
+
+ /**
+ * \brief Memory usage limit to reduce the number of threads
+ *
+ * Encoder: Ignored.
+ *
+ * Decoder:
+ *
+ * If the number of threads has been set so high that more than
+ * memlimit_threading bytes of memory would be needed, the number
+ * of threads will be reduced so that the memory usage will not exceed
+ * memlimit_threading bytes. However, if memlimit_threading cannot
+ * be met even in single-threaded mode, then decoding will continue
+ * in single-threaded mode and memlimit_threading may be exceeded
+ * even by a large amount. That is, memlimit_threading will never make
+ * lzma_code() return LZMA_MEMLIMIT_ERROR. To truly cap the memory
+ * usage, see memlimit_stop below.
+ *
+ * Setting memlimit_threading to UINT64_MAX or a similar huge value
+ * means that liblzma is allowed to keep the whole compressed file
+ * and the whole uncompressed file in memory in addition to the memory
+ * needed by the decompressor data structures used by each thread!
+ * In other words, a reasonable value limit must be set here or it
+ * will cause problems sooner or later. If you have no idea what
+ * a reasonable value could be, try lzma_physmem() / 4 as a starting
+ * point. Setting this limit will never prevent decompression of
+ * a file; this will only reduce the number of threads.
+ *
+ * If memlimit_threading is greater than memlimit_stop, then the value
+ * of memlimit_stop will be used for both.
+ */
+ uint64_t memlimit_threading;
+
+ /**
+ * \brief Memory usage limit that should never be exceeded
+ *
+ * Encoder: Ignored.
+ *
+ * Decoder: If decompressing will need more than this amount of
+ * memory even in the single-threaded mode, then lzma_code() will
+ * return LZMA_MEMLIMIT_ERROR.
+ */
+ uint64_t memlimit_stop;
+
+ /** \private Reserved member. */
+ uint64_t reserved_int7;
+
+ /** \private Reserved member. */
+ uint64_t reserved_int8;
+
+ /** \private Reserved member. */
+ void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ void *reserved_ptr2;
+
+ /** \private Reserved member. */
+ void *reserved_ptr3;
+
+ /** \private Reserved member. */
+ void *reserved_ptr4;
+
+} lzma_mt;
+
+
+/**
+ * \brief Calculate approximate memory usage of easy encoder
+ *
+ * This function is a wrapper for lzma_raw_encoder_memusage().
+ *
+ * \param preset Compression preset (level and possible flags)
+ *
+ * \return Number of bytes of memory required for the given
+ * preset when encoding or UINT64_MAX on error.
+ */
+extern LZMA_API(uint64_t) lzma_easy_encoder_memusage(uint32_t preset)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Calculate approximate decoder memory usage of a preset
+ *
+ * This function is a wrapper for lzma_raw_decoder_memusage().
+ *
+ * \param preset Compression preset (level and possible flags)
+ *
+ * \return Number of bytes of memory required to decompress a file
+ * that was compressed using the given preset or UINT64_MAX
+ * on error.
+ */
+extern LZMA_API(uint64_t) lzma_easy_decoder_memusage(uint32_t preset)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Initialize .xz Stream encoder using a preset number
+ *
+ * This function is intended for those who just want to use the basic features
+ * of liblzma (that is, most developers out there).
+ *
+ * If initialization fails (return value is not LZMA_OK), all the memory
+ * allocated for *strm by liblzma is always freed. Thus, there is no need
+ * to call lzma_end() after failed initialization.
+ *
+ * If initialization succeeds, use lzma_code() to do the actual encoding.
+ * Valid values for `action' (the second argument of lzma_code()) are
+ * LZMA_RUN, LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, and LZMA_FINISH. In future,
+ * there may be compression levels or flags that don't support LZMA_SYNC_FLUSH.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param preset Compression preset to use. A preset consist of level
+ * number and zero or more flags. Usually flags aren't
+ * used, so preset is simply a number [0, 9] which match
+ * the options -0 ... -9 of the xz command line tool.
+ * Additional flags can be be set using bitwise-or with
+ * the preset level number, e.g. 6 | LZMA_PRESET_EXTREME.
+ * \param check Integrity check type to use. See check.h for available
+ * checks. The xz command line tool defaults to
+ * LZMA_CHECK_CRC64, which is a good choice if you are
+ * unsure. LZMA_CHECK_CRC32 is good too as long as the
+ * uncompressed file is not many gigabytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization succeeded. Use lzma_code() to
+ * encode your data.
+ * - LZMA_MEM_ERROR: Memory allocation failed.
+ * - LZMA_OPTIONS_ERROR: The given compression preset is not
+ * supported by this build of liblzma.
+ * - LZMA_UNSUPPORTED_CHECK: The given check type is not
+ * supported by this liblzma build.
+ * - LZMA_PROG_ERROR: One or more of the parameters have values
+ * that will never be valid. For example, strm == NULL.
+ */
+extern LZMA_API(lzma_ret) lzma_easy_encoder(
+ lzma_stream *strm, uint32_t preset, lzma_check check)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Single-call .xz Stream encoding using a preset number
+ *
+ * The maximum required output buffer size can be calculated with
+ * lzma_stream_buffer_bound().
+ *
+ * \param preset Compression preset to use. See the description
+ * in lzma_easy_encoder().
+ * \param check Type of the integrity check to calculate from
+ * uncompressed data.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_size Size of the input buffer
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_easy_buffer_encode(
+ uint32_t preset, lzma_check check,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size) lzma_nothrow;
+
+
+/**
+ * \brief Initialize .xz Stream encoder using a custom filter chain
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN. See filters.h for more
+ * information.
+ * \param check Type of the integrity check to calculate from
+ * uncompressed data.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization was successful.
+ * - LZMA_MEM_ERROR
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_encoder(lzma_stream *strm,
+ const lzma_filter *filters, lzma_check check)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Calculate approximate memory usage of multithreaded .xz encoder
+ *
+ * Since doing the encoding in threaded mode doesn't affect the memory
+ * requirements of single-threaded decompressor, you can use
+ * lzma_easy_decoder_memusage(options->preset) or
+ * lzma_raw_decoder_memusage(options->filters) to calculate
+ * the decompressor memory requirements.
+ *
+ * \param options Compression options
+ *
+ * \return Number of bytes of memory required for encoding with the
+ * given options. If an error occurs, for example due to
+ * unsupported preset or filter chain, UINT64_MAX is returned.
+ */
+extern LZMA_API(uint64_t) lzma_stream_encoder_mt_memusage(
+ const lzma_mt *options) lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Initialize multithreaded .xz Stream encoder
+ *
+ * This provides the functionality of lzma_easy_encoder() and
+ * lzma_stream_encoder() as a single function for multithreaded use.
+ *
+ * The supported actions for lzma_code() are LZMA_RUN, LZMA_FULL_FLUSH,
+ * LZMA_FULL_BARRIER, and LZMA_FINISH. Support for LZMA_SYNC_FLUSH might be
+ * added in the future.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param options Pointer to multithreaded compression options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_encoder_mt(
+ lzma_stream *strm, const lzma_mt *options)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .lzma encoder (legacy file format)
+ *
+ * The .lzma format is sometimes called the LZMA_Alone format, which is the
+ * reason for the name of this function. The .lzma format supports only the
+ * LZMA1 filter. There is no support for integrity checks like CRC32.
+ *
+ * Use this function if and only if you need to create files readable by
+ * legacy LZMA tools such as LZMA Utils 4.32.x. Moving to the .xz format
+ * is strongly recommended.
+ *
+ * The valid action values for lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * No kind of flushing is supported, because the file format doesn't make
+ * it possible.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param options Pointer to encoder options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_alone_encoder(
+ lzma_stream *strm, const lzma_options_lzma *options)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Calculate output buffer size for single-call Stream encoder
+ *
+ * When trying to compress incompressible data, the encoded size will be
+ * slightly bigger than the input data. This function calculates how much
+ * output buffer space is required to be sure that lzma_stream_buffer_encode()
+ * doesn't return LZMA_BUF_ERROR.
+ *
+ * The calculated value is not exact, but it is guaranteed to be big enough.
+ * The actual maximum output space required may be slightly smaller (up to
+ * about 100 bytes). This should not be a problem in practice.
+ *
+ * If the calculated maximum size doesn't fit into size_t or would make the
+ * Stream grow past LZMA_VLI_MAX (which should never happen in practice),
+ * zero is returned to indicate the error.
+ *
+ * \note The limit calculated by this function applies only to
+ * single-call encoding. Multi-call encoding may (and probably
+ * will) have larger maximum expansion when encoding
+ * incompressible data. Currently there is no function to
+ * calculate the maximum expansion of multi-call encoding.
+ *
+ * \param uncompressed_size Size in bytes of the uncompressed
+ * input data
+ *
+ * \return Maximum number of bytes needed to store the compressed data.
+ */
+extern LZMA_API(size_t) lzma_stream_buffer_bound(size_t uncompressed_size)
+ lzma_nothrow;
+
+
+/**
+ * \brief Single-call .xz Stream encoder
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN. See filters.h for more
+ * information.
+ * \param check Type of the integrity check to calculate from
+ * uncompressed data.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_size Size of the input buffer
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_UNSUPPORTED_CHECK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_buffer_encode(
+ lzma_filter *filters, lzma_check check,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief MicroLZMA encoder
+ *
+ * The MicroLZMA format is a raw LZMA stream whose first byte (always 0x00)
+ * has been replaced with bitwise-negation of the LZMA properties (lc/lp/pb).
+ * This encoding ensures that the first byte of MicroLZMA stream is never
+ * 0x00. There is no end of payload marker and thus the uncompressed size
+ * must be stored separately. For the best error detection the dictionary
+ * size should be stored separately as well but alternatively one may use
+ * the uncompressed size as the dictionary size when decoding.
+ *
+ * With the MicroLZMA encoder, lzma_code() behaves slightly unusually.
+ * The action argument must be LZMA_FINISH and the return value will never be
+ * LZMA_OK. Thus the encoding is always done with a single lzma_code() after
+ * the initialization. The benefit of the combination of initialization
+ * function and lzma_code() is that memory allocations can be re-used for
+ * better performance.
+ *
+ * lzma_code() will try to encode as much input as is possible to fit into
+ * the given output buffer. If not all input can be encoded, the stream will
+ * be finished without encoding all the input. The caller must check both
+ * input and output buffer usage after lzma_code() (total_in and total_out
+ * in lzma_stream can be convenient). Often lzma_code() can fill the output
+ * buffer completely if there is a lot of input, but sometimes a few bytes
+ * may remain unused because the next LZMA symbol would require more space.
+ *
+ * lzma_stream.avail_out must be at least 6. Otherwise LZMA_PROG_ERROR
+ * will be returned.
+ *
+ * The LZMA dictionary should be reasonably low to speed up the encoder
+ * re-initialization. A good value is bigger than the resulting
+ * uncompressed size of most of the output chunks. For example, if output
+ * size is 4 KiB, dictionary size of 32 KiB or 64 KiB is good. If the
+ * data compresses extremely well, even 128 KiB may be useful.
+ *
+ * The MicroLZMA format and this encoder variant were made with the EROFS
+ * file system in mind. This format may be convenient in other embedded
+ * uses too where many small streams are needed. XZ Embedded includes a
+ * decoder for this format.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param options Pointer to encoder options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_STREAM_END: All good. Check the amounts of input used
+ * and output produced. Store the amount of input used
+ * (uncompressed size) as it needs to be known to decompress
+ * the data.
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR: In addition to the generic reasons for this
+ * error code, this may also be returned if there isn't enough
+ * output space (6 bytes) to create a valid MicroLZMA stream.
+ */
+extern LZMA_API(lzma_ret) lzma_microlzma_encoder(
+ lzma_stream *strm, const lzma_options_lzma *options)
+ lzma_nothrow;
+
+
+/************
+ * Decoding *
+ ************/
+
+/**
+ * This flag makes lzma_code() return LZMA_NO_CHECK if the input stream
+ * being decoded has no integrity check. Note that when used with
+ * lzma_auto_decoder(), all .lzma files will trigger LZMA_NO_CHECK
+ * if LZMA_TELL_NO_CHECK is used.
+ */
+#define LZMA_TELL_NO_CHECK UINT32_C(0x01)
+
+
+/**
+ * This flag makes lzma_code() return LZMA_UNSUPPORTED_CHECK if the input
+ * stream has an integrity check, but the type of the integrity check is not
+ * supported by this liblzma version or build. Such files can still be
+ * decoded, but the integrity check cannot be verified.
+ */
+#define LZMA_TELL_UNSUPPORTED_CHECK UINT32_C(0x02)
+
+
+/**
+ * This flag makes lzma_code() return LZMA_GET_CHECK as soon as the type
+ * of the integrity check is known. The type can then be got with
+ * lzma_get_check().
+ */
+#define LZMA_TELL_ANY_CHECK UINT32_C(0x04)
+
+
+/**
+ * This flag makes lzma_code() not calculate and verify the integrity check
+ * of the compressed data in .xz files. This means that invalid integrity
+ * check values won't be detected and LZMA_DATA_ERROR won't be returned in
+ * such cases.
+ *
+ * This flag only affects the checks of the compressed data itself; the CRC32
+ * values in the .xz headers will still be verified normally.
+ *
+ * Don't use this flag unless you know what you are doing. Possible reasons
+ * to use this flag:
+ *
+ * - Trying to recover data from a corrupt .xz file.
+ *
+ * - Speeding up decompression, which matters mostly with SHA-256
+ * or with files that have compressed extremely well. It's recommended
+ * to not use this flag for this purpose unless the file integrity is
+ * verified externally in some other way.
+ *
+ * Support for this flag was added in liblzma 5.1.4beta.
+ */
+#define LZMA_IGNORE_CHECK UINT32_C(0x10)
+
+
+/**
+ * This flag enables decoding of concatenated files with file formats that
+ * allow concatenating compressed files as is. From the formats currently
+ * supported by liblzma, only the .xz and .lz formats allow concatenated
+ * files. Concatenated files are not allowed with the legacy .lzma format.
+ *
+ * This flag also affects the usage of the `action' argument for lzma_code().
+ * When LZMA_CONCATENATED is used, lzma_code() won't return LZMA_STREAM_END
+ * unless LZMA_FINISH is used as `action'. Thus, the application has to set
+ * LZMA_FINISH in the same way as it does when encoding.
+ *
+ * If LZMA_CONCATENATED is not used, the decoders still accept LZMA_FINISH
+ * as `action' for lzma_code(), but the usage of LZMA_FINISH isn't required.
+ */
+#define LZMA_CONCATENATED UINT32_C(0x08)
+
+
+/**
+ * This flag makes the threaded decoder report errors (like LZMA_DATA_ERROR)
+ * as soon as they are detected. This saves time when the application has no
+ * interest in a partially decompressed truncated or corrupt file. Note that
+ * due to timing randomness, if the same truncated or corrupt input is
+ * decompressed multiple times with this flag, a different amount of output
+ * may be produced by different runs, and even the error code might vary.
+ *
+ * When using LZMA_FAIL_FAST, it is recommended to use LZMA_FINISH to tell
+ * the decoder when no more input will be coming because it can help fast
+ * detection and reporting of truncated files. Note that in this situation
+ * truncated files might be diagnosed with LZMA_DATA_ERROR instead of
+ * LZMA_OK or LZMA_BUF_ERROR!
+ *
+ * Without this flag the threaded decoder will provide as much output as
+ * possible at first and then report the pending error. This default behavior
+ * matches the single-threaded decoder and provides repeatable behavior
+ * with truncated or corrupt input. There are a few special cases where the
+ * behavior can still differ like memory allocation failures (LZMA_MEM_ERROR).
+ *
+ * Single-threaded decoders currently ignore this flag.
+ *
+ * Support for this flag was added in liblzma 5.3.3alpha. Note that in older
+ * versions this flag isn't supported (LZMA_OPTIONS_ERROR) even by functions
+ * that ignore this flag in newer liblzma versions.
+ */
+#define LZMA_FAIL_FAST UINT32_C(0x20)
+
+
+/**
+ * \brief Initialize .xz Stream decoder
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param memlimit Memory usage limit as bytes. Use UINT64_MAX
+ * to effectively disable the limiter. liblzma
+ * 5.2.3 and earlier don't allow 0 here and return
+ * LZMA_PROG_ERROR; later versions treat 0 as if 1
+ * had been specified.
+ * \param flags Bitwise-or of zero or more of the decoder flags:
+ * LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
+ * LZMA_TELL_ANY_CHECK, LZMA_IGNORE_CHECK,
+ * LZMA_CONCATENATED, LZMA_FAIL_FAST
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization was successful.
+ * - LZMA_MEM_ERROR: Cannot allocate memory.
+ * - LZMA_OPTIONS_ERROR: Unsupported flags
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_decoder(
+ lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize multithreaded .xz Stream decoder
+ *
+ * The decoder can decode multiple Blocks in parallel. This requires that each
+ * Block Header contains the Compressed Size and Uncompressed size fields
+ * which are added by the multi-threaded encoder, see lzma_stream_encoder_mt().
+ *
+ * A Stream with one Block will only utilize one thread. A Stream with multiple
+ * Blocks but without size information in Block Headers will be processed in
+ * single-threaded mode in the same way as done by lzma_stream_decoder().
+ * Concatenated Streams are processed one Stream at a time; no inter-Stream
+ * parallelization is done.
+ *
+ * This function behaves like lzma_stream_decoder() when options->threads == 1
+ * and options->memlimit_threading <= 1.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param options Pointer to multithreaded compression options
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization was successful.
+ * - LZMA_MEM_ERROR: Cannot allocate memory.
+ * - LZMA_MEMLIMIT_ERROR: Memory usage limit was reached.
+ * - LZMA_OPTIONS_ERROR: Unsupported flags.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_decoder_mt(
+ lzma_stream *strm, const lzma_mt *options)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode .xz, .lzma, and .lz (lzip) files with autodetection
+ *
+ * This decoder autodetects between the .xz, .lzma, and .lz file formats,
+ * and calls lzma_stream_decoder(), lzma_alone_decoder(), or
+ * lzma_lzip_decoder() once the type of the input file has been detected.
+ *
+ * Support for .lz was added in 5.4.0.
+ *
+ * If the flag LZMA_CONCATENATED is used and the input is a .lzma file:
+ * For historical reasons concatenated .lzma files aren't supported.
+ * If there is trailing data after one .lzma stream, lzma_code() will
+ * return LZMA_DATA_ERROR. (lzma_alone_decoder() doesn't have such a check
+ * as it doesn't support any decoder flags. It will return LZMA_STREAM_END
+ * after one .lzma stream.)
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param memlimit Memory usage limit as bytes. Use UINT64_MAX
+ * to effectively disable the limiter. liblzma
+ * 5.2.3 and earlier don't allow 0 here and return
+ * LZMA_PROG_ERROR; later versions treat 0 as if 1
+ * had been specified.
+ * \param flags Bitwise-or of zero or more of the decoder flags:
+ * LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
+ * LZMA_TELL_ANY_CHECK, LZMA_IGNORE_CHECK,
+ * LZMA_CONCATENATED, LZMA_FAIL_FAST
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization was successful.
+ * - LZMA_MEM_ERROR: Cannot allocate memory.
+ * - LZMA_OPTIONS_ERROR: Unsupported flags
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_auto_decoder(
+ lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .lzma decoder (legacy file format)
+ *
+ * Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * There is no need to use LZMA_FINISH, but it's allowed because it may
+ * simplify certain types of applications.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param memlimit Memory usage limit as bytes. Use UINT64_MAX
+ * to effectively disable the limiter. liblzma
+ * 5.2.3 and earlier don't allow 0 here and return
+ * LZMA_PROG_ERROR; later versions treat 0 as if 1
+ * had been specified.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_alone_decoder(
+ lzma_stream *strm, uint64_t memlimit)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .lz (lzip) decoder (a foreign file format)
+ *
+ * This decoder supports the .lz format version 0 and the unextended .lz
+ * format version 1:
+ *
+ * - Files in the format version 0 were produced by lzip 1.3 and older.
+ * Such files aren't common but may be found from file archives
+ * as a few source packages were released in this format. People
+ * might have old personal files in this format too. Decompression
+ * support for the format version 0 was removed in lzip 1.18.
+ *
+ * - lzip 1.3 added decompression support for .lz format version 1 files.
+ * Compression support was added in lzip 1.4. In lzip 1.6 the .lz format
+ * version 1 was extended to support the Sync Flush marker. This extension
+ * is not supported by liblzma. lzma_code() will return LZMA_DATA_ERROR
+ * at the location of the Sync Flush marker. In practice files with
+ * the Sync Flush marker are very rare and thus liblzma can decompress
+ * almost all .lz files.
+ *
+ * Just like with lzma_stream_decoder() for .xz files, LZMA_CONCATENATED
+ * should be used when decompressing normal standalone .lz files.
+ *
+ * The .lz format allows putting non-.lz data at the end of a file after at
+ * least one valid .lz member. That is, one can append custom data at the end
+ * of a .lz file and the decoder is required to ignore it. In liblzma this
+ * is relevant only when LZMA_CONCATENATED is used. In that case lzma_code()
+ * will return LZMA_STREAM_END and leave lzma_stream.next_in pointing to
+ * the first byte of the non-.lz data. An exception to this is if the first
+ * 1-3 bytes of the non-.lz data are identical to the .lz magic bytes
+ * (0x4C, 0x5A, 0x49, 0x50; "LZIP" in US-ASCII). In such a case the 1-3 bytes
+ * will have been ignored by lzma_code(). If one wishes to locate the non-.lz
+ * data reliably, one must ensure that the first byte isn't 0x4C. Actually
+ * one should ensure that none of the first four bytes of trailing data are
+ * equal to the magic bytes because lzip >= 1.20 requires it by default.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param memlimit Memory usage limit as bytes. Use UINT64_MAX
+ * to effectively disable the limiter.
+ * \param flags Bitwise-or of flags, or zero for no flags.
+ * All decoder flags listed above are supported
+ * although only LZMA_CONCATENATED and (in very rare
+ * cases) LZMA_IGNORE_CHECK are actually useful.
+ * LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
+ * and LZMA_FAIL_FAST do nothing. LZMA_TELL_ANY_CHECK
+ * is supported for consistency only as CRC32 is
+ * always used in the .lz format.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization was successful.
+ * - LZMA_MEM_ERROR: Cannot allocate memory.
+ * - LZMA_OPTIONS_ERROR: Unsupported flags
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_lzip_decoder(
+ lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Single-call .xz Stream decoder
+ *
+ * \param memlimit Pointer to how much memory the decoder is allowed
+ * to allocate. The value pointed by this pointer is
+ * modified if and only if LZMA_MEMLIMIT_ERROR is
+ * returned.
+ * \param flags Bitwise-or of zero or more of the decoder flags:
+ * LZMA_TELL_NO_CHECK, LZMA_TELL_UNSUPPORTED_CHECK,
+ * LZMA_IGNORE_CHECK, LZMA_CONCATENATED,
+ * LZMA_FAIL_FAST. Note that LZMA_TELL_ANY_CHECK
+ * is not allowed and will return LZMA_PROG_ERROR.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_pos The next byte will be read from in[*in_pos].
+ * *in_pos is updated only if decoding succeeds.
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if decoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_FORMAT_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_NO_CHECK: This can be returned only if using
+ * the LZMA_TELL_NO_CHECK flag.
+ * - LZMA_UNSUPPORTED_CHECK: This can be returned only if using
+ * the LZMA_TELL_UNSUPPORTED_CHECK flag.
+ * - LZMA_MEM_ERROR
+ * - LZMA_MEMLIMIT_ERROR: Memory usage limit was reached.
+ * The minimum required memlimit value was stored to *memlimit.
+ * - LZMA_BUF_ERROR: Output buffer was too small.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_stream_buffer_decode(
+ uint64_t *memlimit, uint32_t flags,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief MicroLZMA decoder
+ *
+ * See lzma_microlzma_encoder() for more information.
+ *
+ * The lzma_code() usage with this decoder is completely normal. The
+ * special behavior of lzma_code() applies to lzma_microlzma_encoder() only.
+ *
+ * \param strm Pointer to lzma_stream that is at least initialized
+ * with LZMA_STREAM_INIT.
+ * \param comp_size Compressed size of the MicroLZMA stream.
+ * The caller must somehow know this exactly.
+ * \param uncomp_size Uncompressed size of the MicroLZMA stream.
+ * If the exact uncompressed size isn't known, this
+ * can be set to a value that is at most as big as
+ * the exact uncompressed size would be, but then the
+ * next argument uncomp_size_is_exact must be false.
+ * \param uncomp_size_is_exact
+ * If true, uncomp_size must be exactly correct.
+ * This will improve error detection at the end of
+ * the stream. If the exact uncompressed size isn't
+ * known, this must be false. uncomp_size must still
+ * be at most as big as the exact uncompressed size
+ * is. Setting this to false when the exact size is
+ * known will work but error detection at the end of
+ * the stream will be weaker.
+ * \param dict_size LZMA dictionary size that was used when
+ * compressing the data. It is OK to use a bigger
+ * value too but liblzma will then allocate more
+ * memory than would actually be required and error
+ * detection will be slightly worse. (Note that with
+ * the implementation in XZ Embedded it doesn't
+ * affect the memory usage if one specifies bigger
+ * dictionary than actually required.)
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_microlzma_decoder(
+ lzma_stream *strm, uint64_t comp_size,
+ uint64_t uncomp_size, lzma_bool uncomp_size_is_exact,
+ uint32_t dict_size) lzma_nothrow;
diff --git a/src/liblzma/api/lzma/delta.h b/src/liblzma/api/lzma/delta.h
new file mode 100644
index 0000000..7a725bc
--- /dev/null
+++ b/src/liblzma/api/lzma/delta.h
@@ -0,0 +1,96 @@
+/**
+ * \file lzma/delta.h
+ * \brief Delta filter
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Filter ID
+ *
+ * Filter ID of the Delta filter. This is used as lzma_filter.id.
+ */
+#define LZMA_FILTER_DELTA LZMA_VLI_C(0x03)
+
+
+/**
+ * \brief Type of the delta calculation
+ *
+ * Currently only byte-wise delta is supported. Other possible types could
+ * be, for example, delta of 16/32/64-bit little/big endian integers, but
+ * these are not currently planned since byte-wise delta is almost as good.
+ */
+typedef enum {
+ LZMA_DELTA_TYPE_BYTE
+} lzma_delta_type;
+
+
+/**
+ * \brief Options for the Delta filter
+ *
+ * These options are needed by both encoder and decoder.
+ */
+typedef struct {
+ /** For now, this must always be LZMA_DELTA_TYPE_BYTE. */
+ lzma_delta_type type;
+
+ /**
+ * \brief Delta distance
+ *
+ * With the only currently supported type, LZMA_DELTA_TYPE_BYTE,
+ * the distance is as bytes.
+ *
+ * Examples:
+ * - 16-bit stereo audio: distance = 4 bytes
+ * - 24-bit RGB image data: distance = 3 bytes
+ */
+ uint32_t dist;
+
+ /**
+ * \brief Minimum value for lzma_options_delta.dist.
+ */
+# define LZMA_DELTA_DIST_MIN 1
+
+ /**
+ * \brief Maximum value for lzma_options_delta.dist.
+ */
+# define LZMA_DELTA_DIST_MAX 256
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. You should not touch these, because the names
+ * of these variables may change. These are and will never be used
+ * when type is LZMA_DELTA_TYPE_BYTE, so it is safe to leave these
+ * uninitialized.
+ */
+
+ /** \private Reserved member. */
+ uint32_t reserved_int1;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int2;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int3;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int4;
+
+ /** \private Reserved member. */
+ void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ void *reserved_ptr2;
+
+} lzma_options_delta;
diff --git a/src/liblzma/api/lzma/filter.h b/src/liblzma/api/lzma/filter.h
new file mode 100644
index 0000000..1d887b4
--- /dev/null
+++ b/src/liblzma/api/lzma/filter.h
@@ -0,0 +1,770 @@
+/**
+ * \file lzma/filter.h
+ * \brief Common filter related types and functions
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Maximum number of filters in a chain
+ *
+ * A filter chain can have 1-4 filters, of which three are allowed to change
+ * the size of the data. Usually only one or two filters are needed.
+ */
+#define LZMA_FILTERS_MAX 4
+
+
+/**
+ * \brief Filter options
+ *
+ * This structure is used to pass a Filter ID and a pointer to the filter's
+ * options to liblzma. A few functions work with a single lzma_filter
+ * structure, while most functions expect a filter chain.
+ *
+ * A filter chain is indicated with an array of lzma_filter structures.
+ * The array is terminated with .id = LZMA_VLI_UNKNOWN. Thus, the filter
+ * array must have LZMA_FILTERS_MAX + 1 elements (that is, five) to
+ * be able to hold any arbitrary filter chain. This is important when
+ * using lzma_block_header_decode() from block.h, because a filter array
+ * that is too small would make liblzma write past the end of the array.
+ */
+typedef struct {
+ /**
+ * \brief Filter ID
+ *
+ * Use constants whose name begin with `LZMA_FILTER_' to specify
+ * different filters. In an array of lzma_filter structures, use
+ * LZMA_VLI_UNKNOWN to indicate end of filters.
+ *
+ * \note This is not an enum, because on some systems enums
+ * cannot be 64-bit.
+ */
+ lzma_vli id;
+
+ /**
+ * \brief Pointer to filter-specific options structure
+ *
+ * If the filter doesn't need options, set this to NULL. If id is
+ * set to LZMA_VLI_UNKNOWN, options is ignored, and thus
+ * doesn't need be initialized.
+ */
+ void *options;
+
+} lzma_filter;
+
+
+/**
+ * \brief Test if the given Filter ID is supported for encoding
+ *
+ * \param id Filter ID
+ *
+ * \return lzma_bool:
+ * - true if the Filter ID is supported for encoding by this
+ * liblzma build.
+ * - false otherwise.
+ */
+extern LZMA_API(lzma_bool) lzma_filter_encoder_is_supported(lzma_vli id)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Test if the given Filter ID is supported for decoding
+ *
+ * \param id Filter ID
+ *
+ * \return lzma_bool:
+ * - true if the Filter ID is supported for decoding by this
+ * liblzma build.
+ * - false otherwise.
+ */
+extern LZMA_API(lzma_bool) lzma_filter_decoder_is_supported(lzma_vli id)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Copy the filters array
+ *
+ * Copy the Filter IDs and filter-specific options from src to dest.
+ * Up to LZMA_FILTERS_MAX filters are copied, plus the terminating
+ * .id == LZMA_VLI_UNKNOWN. Thus, dest should have at least
+ * LZMA_FILTERS_MAX + 1 elements space unless the caller knows that
+ * src is smaller than that.
+ *
+ * Unless the filter-specific options is NULL, the Filter ID has to be
+ * supported by liblzma, because liblzma needs to know the size of every
+ * filter-specific options structure. The filter-specific options are not
+ * validated. If options is NULL, any unsupported Filter IDs are copied
+ * without returning an error.
+ *
+ * Old filter-specific options in dest are not freed, so dest doesn't
+ * need to be initialized by the caller in any way.
+ *
+ * If an error occurs, memory possibly already allocated by this function
+ * is always freed. liblzma versions older than 5.2.7 may modify the dest
+ * array and leave its contents in an undefined state if an error occurs.
+ * liblzma 5.2.7 and newer only modify the dest array when returning LZMA_OK.
+ *
+ * \param src Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ * \param[out] dest Destination filter array
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR: Unsupported Filter ID and its options
+ * is not NULL.
+ * - LZMA_PROG_ERROR: src or dest is NULL.
+ */
+extern LZMA_API(lzma_ret) lzma_filters_copy(
+ const lzma_filter *src, lzma_filter *dest,
+ const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Free the options in the array of lzma_filter structures
+ *
+ * This frees the filter chain options. The filters array itself is not freed.
+ *
+ * The filters array must have at most LZMA_FILTERS_MAX + 1 elements
+ * including the terminating element which must have .id = LZMA_VLI_UNKNOWN.
+ * For all elements before the terminating element:
+ * - options will be freed using the given lzma_allocator or,
+ * if allocator is NULL, using free().
+ * - options will be set to NULL.
+ * - id will be set to LZMA_VLI_UNKNOWN.
+ *
+ * If filters is NULL, this does nothing. Again, this never frees the
+ * filters array itself.
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ */
+extern LZMA_API(void) lzma_filters_free(
+ lzma_filter *filters, const lzma_allocator *allocator)
+ lzma_nothrow;
+
+
+/**
+ * \brief Calculate approximate memory requirements for raw encoder
+ *
+ * This function can be used to calculate the memory requirements for
+ * Block and Stream encoders too because Block and Stream encoders don't
+ * need significantly more memory than raw encoder.
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ *
+ * \return Number of bytes of memory required for the given
+ * filter chain when encoding or UINT64_MAX on error.
+ */
+extern LZMA_API(uint64_t) lzma_raw_encoder_memusage(const lzma_filter *filters)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Calculate approximate memory requirements for raw decoder
+ *
+ * This function can be used to calculate the memory requirements for
+ * Block and Stream decoders too because Block and Stream decoders don't
+ * need significantly more memory than raw decoder.
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ *
+ * \return Number of bytes of memory required for the given
+ * filter chain when decoding or UINT64_MAX on error.
+ */
+extern LZMA_API(uint64_t) lzma_raw_decoder_memusage(const lzma_filter *filters)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Initialize raw encoder
+ *
+ * This function may be useful when implementing custom file formats.
+ *
+ * The `action' with lzma_code() can be LZMA_RUN, LZMA_SYNC_FLUSH (if the
+ * filter chain supports it), or LZMA_FINISH.
+ *
+ * \param strm Pointer to lzma_stream that is at least
+ * initialized with LZMA_STREAM_INIT.
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_raw_encoder(
+ lzma_stream *strm, const lzma_filter *filters)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize raw decoder
+ *
+ * The initialization of raw decoder goes similarly to raw encoder.
+ *
+ * The `action' with lzma_code() can be LZMA_RUN or LZMA_FINISH. Using
+ * LZMA_FINISH is not required, it is supported just for convenience.
+ *
+ * \param strm Pointer to lzma_stream that is at least
+ * initialized with LZMA_STREAM_INIT.
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_raw_decoder(
+ lzma_stream *strm, const lzma_filter *filters)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Update the filter chain in the encoder
+ *
+ * This function may be called after lzma_code() has returned LZMA_STREAM_END
+ * when LZMA_FULL_BARRIER, LZMA_FULL_FLUSH, or LZMA_SYNC_FLUSH was used:
+ *
+ * - After LZMA_FULL_BARRIER or LZMA_FULL_FLUSH: Single-threaded .xz Stream
+ * encoder (lzma_stream_encoder()) and (since liblzma 5.4.0) multi-threaded
+ * Stream encoder (lzma_stream_encoder_mt()) allow setting a new filter
+ * chain to be used for the next Block(s).
+ *
+ * - After LZMA_SYNC_FLUSH: Raw encoder (lzma_raw_encoder()),
+ * Block encoder (lzma_block_encoder()), and single-threaded .xz Stream
+ * encoder (lzma_stream_encoder()) allow changing certain filter-specific
+ * options in the middle of encoding. The actual filters in the chain
+ * (Filter IDs) must not be changed! Currently only the lc, lp, and pb
+ * options of LZMA2 (not LZMA1) can be changed this way.
+ *
+ * - In the future some filters might allow changing some of their options
+ * without any barrier or flushing but currently such filters don't exist.
+ *
+ * This function may also be called when no data has been compressed yet
+ * although this is rarely useful. In that case, this function will behave
+ * as if LZMA_FULL_FLUSH (Stream encoders) or LZMA_SYNC_FLUSH (Raw or Block
+ * encoder) had been used right before calling this function.
+ *
+ * \param strm Pointer to lzma_stream that is at least
+ * initialized with LZMA_STREAM_INIT.
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_MEMLIMIT_ERROR
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_filters_update(
+ lzma_stream *strm, const lzma_filter *filters) lzma_nothrow;
+
+
+/**
+ * \brief Single-call raw encoder
+ *
+ * \note There is no function to calculate how big output buffer
+ * would surely be big enough. (lzma_stream_buffer_bound()
+ * works only for lzma_stream_buffer_encode(); raw encoder
+ * won't necessarily meet that bound.)
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_size Size of the input buffer
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_raw_buffer_encode(
+ const lzma_filter *filters, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size, uint8_t *out,
+ size_t *out_pos, size_t out_size) lzma_nothrow;
+
+
+/**
+ * \brief Single-call raw decoder
+ *
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_pos The next byte will be read from in[*in_pos].
+ * *in_pos is updated only if decoding succeeds.
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_BUF_ERROR: Not enough output buffer space.
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_raw_buffer_decode(
+ const lzma_filter *filters, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size) lzma_nothrow;
+
+
+/**
+ * \brief Get the size of the Filter Properties field
+ *
+ * This function may be useful when implementing custom file formats
+ * using the raw encoder and decoder.
+ *
+ * \note This function validates the Filter ID, but does not
+ * necessarily validate the options. Thus, it is possible
+ * that this returns LZMA_OK while the following call to
+ * lzma_properties_encode() returns LZMA_OPTIONS_ERROR.
+ *
+ * \param[out] size Pointer to uint32_t to hold the size of the properties
+ * \param filter Filter ID and options (the size of the properties may
+ * vary depending on the options)
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_properties_size(
+ uint32_t *size, const lzma_filter *filter) lzma_nothrow;
+
+
+/**
+ * \brief Encode the Filter Properties field
+ *
+ * \note Even this function won't validate more options than actually
+ * necessary. Thus, it is possible that encoding the properties
+ * succeeds but using the same options to initialize the encoder
+ * will fail.
+ *
+ * \note If lzma_properties_size() indicated that the size
+ * of the Filter Properties field is zero, calling
+ * lzma_properties_encode() is not required, but it
+ * won't do any harm either.
+ *
+ * \param filter Filter ID and options
+ * \param[out] props Buffer to hold the encoded options. The size of
+ * the buffer must have been already determined with
+ * lzma_properties_size().
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_properties_encode(
+ const lzma_filter *filter, uint8_t *props) lzma_nothrow;
+
+
+/**
+ * \brief Decode the Filter Properties field
+ *
+ * \param filter filter->id must have been set to the correct
+ * Filter ID. filter->options doesn't need to be
+ * initialized (it's not freed by this function). The
+ * decoded options will be stored in filter->options;
+ * it's application's responsibility to free it when
+ * appropriate. filter->options is set to NULL if
+ * there are no properties or if an error occurs.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * and in case of an error, also free().
+ * \param props Input buffer containing the properties.
+ * \param props_size Size of the properties. This must be the exact
+ * size; giving too much or too little input will
+ * return LZMA_OPTIONS_ERROR.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_properties_decode(
+ lzma_filter *filter, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size) lzma_nothrow;
+
+
+/**
+ * \brief Calculate encoded size of a Filter Flags field
+ *
+ * Knowing the size of Filter Flags is useful to know when allocating
+ * memory to hold the encoded Filter Flags.
+ *
+ * \note If you need to calculate size of List of Filter Flags,
+ * you need to loop over every lzma_filter entry.
+ *
+ * \param[out] size Pointer to integer to hold the calculated size
+ * \param filter Filter ID and associated options whose encoded
+ * size is to be calculated
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: *size set successfully. Note that this doesn't
+ * guarantee that filter->options is valid, thus
+ * lzma_filter_flags_encode() may still fail.
+ * - LZMA_OPTIONS_ERROR: Unknown Filter ID or unsupported options.
+ * - LZMA_PROG_ERROR: Invalid options
+ */
+extern LZMA_API(lzma_ret) lzma_filter_flags_size(
+ uint32_t *size, const lzma_filter *filter)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Encode Filter Flags into given buffer
+ *
+ * In contrast to some functions, this doesn't allocate the needed buffer.
+ * This is due to how this function is used internally by liblzma.
+ *
+ * \param filter Filter ID and options to be encoded
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos out[*out_pos] is the next write position. This
+ * is updated by the encoder.
+ * \param out_size out[out_size] is the first byte to not write.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_OPTIONS_ERROR: Invalid or unsupported options.
+ * - LZMA_PROG_ERROR: Invalid options or not enough output
+ * buffer space (you should have checked it with
+ * lzma_filter_flags_size()).
+ */
+extern LZMA_API(lzma_ret) lzma_filter_flags_encode(const lzma_filter *filter,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode Filter Flags from given buffer
+ *
+ * The decoded result is stored into *filter. The old value of
+ * filter->options is not free()d. If anything other than LZMA_OK
+ * is returned, filter->options is set to NULL.
+ *
+ * \param[out] filter Destination filter. The decoded Filter ID will
+ * be stored in filter->id. If options are needed
+ * they will be allocated and the pointer will be
+ * stored in filter->options.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param[out] in_pos The next byte will be read from in[*in_pos].
+ * *in_pos is updated only if decoding succeeds.
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_filter_flags_decode(
+ lzma_filter *filter, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/***********
+ * Strings *
+ ***********/
+
+/**
+ * \brief Allow or show all filters
+ *
+ * By default only the filters supported in the .xz format are accept by
+ * lzma_str_to_filters() or shown by lzma_str_list_filters().
+ */
+#define LZMA_STR_ALL_FILTERS UINT32_C(0x01)
+
+
+/**
+ * \brief Do not validate the filter chain in lzma_str_to_filters()
+ *
+ * By default lzma_str_to_filters() can return an error if the filter chain
+ * as a whole isn't usable in the .xz format or in the raw encoder or decoder.
+ * With this flag, this validation is skipped. This flag doesn't affect the
+ * handling of the individual filter options. To allow non-.xz filters also
+ * LZMA_STR_ALL_FILTERS is needed.
+ */
+#define LZMA_STR_NO_VALIDATION UINT32_C(0x02)
+
+
+/**
+ * \brief Stringify encoder options
+ *
+ * Show the filter-specific options that the encoder will use.
+ * This may be useful for verbose diagnostic messages.
+ *
+ * Note that if options were decoded from .xz headers then the encoder options
+ * may be undefined. This flag shouldn't be used in such a situation.
+ */
+#define LZMA_STR_ENCODER UINT32_C(0x10)
+
+
+/**
+ * \brief Stringify decoder options
+ *
+ * Show the filter-specific options that the decoder will use.
+ * This may be useful for showing what filter options were decoded
+ * from file headers.
+ */
+#define LZMA_STR_DECODER UINT32_C(0x20)
+
+
+/**
+ * \brief Produce xz-compatible getopt_long() syntax
+ *
+ * That is, "delta:dist=2 lzma2:dict=4MiB,pb=1,lp=1" becomes
+ * "--delta=dist=2 --lzma2=dict=4MiB,pb=1,lp=1".
+ *
+ * This syntax is compatible with xz 5.0.0 as long as the filters and
+ * their options are supported too.
+ */
+#define LZMA_STR_GETOPT_LONG UINT32_C(0x40)
+
+
+/**
+ * \brief Use two dashes "--" instead of a space to separate filters
+ *
+ * That is, "delta:dist=2 lzma2:pb=1,lp=1" becomes
+ * "delta:dist=2--lzma2:pb=1,lp=1". This looks slightly odd but this
+ * kind of strings should be usable on the command line without quoting.
+ * However, it is possible that future versions with new filter options
+ * might produce strings that require shell quoting anyway as the exact
+ * set of possible characters isn't frozen for now.
+ *
+ * It is guaranteed that the single quote (') will never be used in
+ * filter chain strings (even if LZMA_STR_NO_SPACES isn't used).
+ */
+#define LZMA_STR_NO_SPACES UINT32_C(0x80)
+
+
+/**
+ * \brief Convert a string to a filter chain
+ *
+ * This tries to make it easier to write applications that allow users
+ * to set custom compression options. This only handles the filter
+ * configuration (including presets) but not the number of threads,
+ * block size, check type, or memory limits.
+ *
+ * The input string can be either a preset or a filter chain. Presets
+ * begin with a digit 0-9 and may be followed by zero or more flags
+ * which are lower-case letters. Currently only "e" is supported, matching
+ * LZMA_PRESET_EXTREME. For partial xz command line syntax compatibility,
+ * a preset string may start with a single dash "-".
+ *
+ * A filter chain consists of one or more "filtername:opt1=value1,opt2=value2"
+ * strings separated by one or more spaces. Leading and trailing spaces are
+ * ignored. All names and values must be lower-case. Extra commas in the
+ * option list are ignored. The order of filters is significant: when
+ * encoding, the uncompressed input data goes to the leftmost filter first.
+ * Normally "lzma2" is the last filter in the chain.
+ *
+ * If one wishes to avoid spaces, for example, to avoid shell quoting,
+ * it is possible to use two dashes "--" instead of spaces to separate
+ * the filters.
+ *
+ * For xz command line compatibility, each filter may be prefixed with
+ * two dashes "--" and the colon ":" separating the filter name from
+ * the options may be replaced with an equals sign "=".
+ *
+ * By default, only filters that can be used in the .xz format are accepted.
+ * To allow all filters (LZMA1) use the flag LZMA_STR_ALL_FILTERS.
+ *
+ * By default, very basic validation is done for the filter chain as a whole,
+ * for example, that LZMA2 is only used as the last filter in the chain.
+ * The validation isn't perfect though and it's possible that this function
+ * succeeds but using the filter chain for encoding or decoding will still
+ * result in LZMA_OPTIONS_ERROR. To disable this validation, use the flag
+ * LZMA_STR_NO_VALIDATION.
+ *
+ * The available filter names and their options are available via
+ * lzma_str_list_filters(). See the xz man page for the description
+ * of filter names and options.
+ *
+ * For command line applications, below is an example how an error message
+ * can be displayed. Note the use of an empty string for the field width.
+ * If "^" was used there it would create an off-by-one error except at
+ * the very beginning of the line.
+ *
+ * \code{.c}
+ * const char *str = ...; // From user
+ * lzma_filter filters[LZMA_FILTERS_MAX + 1];
+ * int pos;
+ * const char *msg = lzma_str_to_filters(str, &pos, filters, 0, NULL);
+ * if (msg != NULL) {
+ * printf("%s: Error in XZ compression options:\n", argv[0]);
+ * printf("%s: %s\n", argv[0], str);
+ * printf("%s: %*s^\n", argv[0], errpos, "");
+ * printf("%s: %s\n", argv[0], msg);
+ * }
+ * \endcode
+ *
+ * \param str User-supplied string describing a preset or
+ * a filter chain. If a default value is needed and
+ * you don't know what would be good, use "6" since
+ * that is the default preset in xz too.
+ * \param[out] error_pos If this isn't NULL, this value will be set on
+ * both success and on all errors. This tells the
+ * location of the error in the string. This is
+ * an int to make it straightforward to use this
+ * as printf() field width. The value is guaranteed
+ * to be in the range [0, INT_MAX] even if strlen(str)
+ * somehow was greater than INT_MAX.
+ * \param[out] filters An array of lzma_filter structures. There must
+ * be LZMA_FILTERS_MAX + 1 (that is, five) elements
+ * in the array. The old contents are ignored so it
+ * doesn't need to be initialized. This array is
+ * modified only if this function returns NULL.
+ * Once the allocated filter options are no longer
+ * needed, lzma_filters_free() can be used to free the
+ * options (it doesn't free the filters array itself).
+ * \param flags Bitwise-or of zero or more of the flags
+ * LZMA_STR_ALL_FILTERS and LZMA_STR_NO_VALIDATION.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return On success, NULL is returned. On error, a statically-allocated
+ * error message is returned which together with the error_pos
+ * should give some idea what is wrong.
+ */
+extern LZMA_API(const char *) lzma_str_to_filters(
+ const char *str, int *error_pos, lzma_filter *filters,
+ uint32_t flags, const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Convert a filter chain to a string
+ *
+ * Use cases:
+ *
+ * - Verbose output showing the full encoder options to the user
+ * (use LZMA_STR_ENCODER in flags)
+ *
+ * - Showing the filters and options that are required to decode a file
+ * (use LZMA_STR_DECODER in flags)
+ *
+ * - Showing the filter names without any options in informational messages
+ * where the technical details aren't important (no flags). In this case
+ * the .options in the filters array are ignored and may be NULL even if
+ * a filter has a mandatory options structure.
+ *
+ * Note that even if the filter chain was specified using a preset,
+ * the resulting filter chain isn't reversed to a preset. So if you
+ * specify "6" to lzma_str_to_filters() then lzma_str_from_filters()
+ * will produce a string containing "lzma2".
+ *
+ * \param[out] str On success *str will be set to point to an
+ * allocated string describing the given filter
+ * chain. Old value is ignored. On error *str is
+ * always set to NULL.
+ * \param filters Array of filters terminated with
+ * .id == LZMA_VLI_UNKNOWN.
+ * \param flags Bitwise-or of zero or more of the flags
+ * LZMA_STR_ENCODER, LZMA_STR_DECODER,
+ * LZMA_STR_GETOPT_LONG, and LZMA_STR_NO_SPACES.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR: Empty filter chain
+ * (filters[0].id == LZMA_VLI_UNKNOWN) or the filter chain
+ * includes a Filter ID that is not supported by this function.
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_str_from_filters(
+ char **str, const lzma_filter *filters, uint32_t flags,
+ const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief List available filters and/or their options (for help message)
+ *
+ * If a filter_id is given then only one line is created which contains the
+ * filter name. If LZMA_STR_ENCODER or LZMA_STR_DECODER is used then the
+ * options read by the encoder or decoder are printed on the same line.
+ *
+ * If filter_id is LZMA_VLI_UNKNOWN then all supported .xz-compatible filters
+ * are listed:
+ *
+ * - If neither LZMA_STR_ENCODER nor LZMA_STR_DECODER is used then
+ * the supported filter names are listed on a single line separated
+ * by spaces.
+ *
+ * - If LZMA_STR_ENCODER or LZMA_STR_DECODER is used then filters and
+ * the supported options are listed one filter per line. There won't
+ * be a newline after the last filter.
+ *
+ * - If LZMA_STR_ALL_FILTERS is used then the list will include also
+ * those filters that cannot be used in the .xz format (LZMA1).
+ *
+ * \param str On success *str will be set to point to an
+ * allocated string listing the filters and options.
+ * Old value is ignored. On error *str is always set
+ * to NULL.
+ * \param filter_id Filter ID or LZMA_VLI_UNKNOWN.
+ * \param flags Bitwise-or of zero or more of the flags
+ * LZMA_STR_ALL_FILTERS, LZMA_STR_ENCODER,
+ * LZMA_STR_DECODER, and LZMA_STR_GETOPT_LONG.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR: Unsupported filter_id or flags
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_str_list_filters(
+ char **str, lzma_vli filter_id, uint32_t flags,
+ const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
diff --git a/src/liblzma/api/lzma/hardware.h b/src/liblzma/api/lzma/hardware.h
new file mode 100644
index 0000000..f34897d
--- /dev/null
+++ b/src/liblzma/api/lzma/hardware.h
@@ -0,0 +1,63 @@
+/**
+ * \file lzma/hardware.h
+ * \brief Hardware information
+ * \note Never include this file directly. Use <lzma.h> instead.
+ *
+ * Since liblzma can consume a lot of system resources, it also provides
+ * ways to limit the resource usage. Applications linking against liblzma
+ * need to do the actual decisions how much resources to let liblzma to use.
+ * To ease making these decisions, liblzma provides functions to find out
+ * the relevant capabilities of the underlying hardware. Currently there
+ * is only a function to find out the amount of RAM, but in the future there
+ * will be also a function to detect how many concurrent threads the system
+ * can run.
+ *
+ * \note On some operating systems, these function may temporarily
+ * load a shared library or open file descriptor(s) to find out
+ * the requested hardware information. Unless the application
+ * assumes that specific file descriptors are not touched by
+ * other threads, this should have no effect on thread safety.
+ * Possible operations involving file descriptors will restart
+ * the syscalls if they return EINTR.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Get the total amount of physical memory (RAM) in bytes
+ *
+ * This function may be useful when determining a reasonable memory
+ * usage limit for decompressing or how much memory it is OK to use
+ * for compressing.
+ *
+ * \return On success, the total amount of physical memory in bytes
+ * is returned. If the amount of RAM cannot be determined,
+ * zero is returned. This can happen if an error occurs
+ * or if there is no code in liblzma to detect the amount
+ * of RAM on the specific operating system.
+ */
+extern LZMA_API(uint64_t) lzma_physmem(void) lzma_nothrow;
+
+
+/**
+ * \brief Get the number of processor cores or threads
+ *
+ * This function may be useful when determining how many threads to use.
+ * If the hardware supports more than one thread per CPU core, the number
+ * of hardware threads is returned if that information is available.
+ *
+ * \return On success, the number of available CPU threads or cores is
+ * returned. If this information isn't available or an error
+ * occurs, zero is returned.
+ */
+extern LZMA_API(uint32_t) lzma_cputhreads(void) lzma_nothrow;
diff --git a/src/liblzma/api/lzma/index.h b/src/liblzma/api/lzma/index.h
new file mode 100644
index 0000000..6eee4d6
--- /dev/null
+++ b/src/liblzma/api/lzma/index.h
@@ -0,0 +1,860 @@
+/**
+ * \file lzma/index.h
+ * \brief Handling of .xz Index and related information
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Opaque data type to hold the Index(es) and other information
+ *
+ * lzma_index often holds just one .xz Index and possibly the Stream Flags
+ * of the same Stream and size of the Stream Padding field. However,
+ * multiple lzma_indexes can be concatenated with lzma_index_cat() and then
+ * there may be information about multiple Streams in the same lzma_index.
+ *
+ * Notes about thread safety: Only one thread may modify lzma_index at
+ * a time. All functions that take non-const pointer to lzma_index
+ * modify it. As long as no thread is modifying the lzma_index, getting
+ * information from the same lzma_index can be done from multiple threads
+ * at the same time with functions that take a const pointer to
+ * lzma_index or use lzma_index_iter. The same iterator must be used
+ * only by one thread at a time, of course, but there can be as many
+ * iterators for the same lzma_index as needed.
+ */
+typedef struct lzma_index_s lzma_index;
+
+
+/**
+ * \brief Iterator to get information about Blocks and Streams
+ */
+typedef struct {
+ struct {
+ /**
+ * \brief Pointer to Stream Flags
+ *
+ * This is NULL if Stream Flags have not been set for
+ * this Stream with lzma_index_stream_flags().
+ */
+ const lzma_stream_flags *flags;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr2;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr3;
+
+ /**
+ * \brief Stream number in the lzma_index
+ *
+ * The first Stream is 1.
+ */
+ lzma_vli number;
+
+ /**
+ * \brief Number of Blocks in the Stream
+ *
+ * If this is zero, the block structure below has
+ * undefined values.
+ */
+ lzma_vli block_count;
+
+ /**
+ * \brief Compressed start offset of this Stream
+ *
+ * The offset is relative to the beginning of the lzma_index
+ * (i.e. usually the beginning of the .xz file).
+ */
+ lzma_vli compressed_offset;
+
+ /**
+ * \brief Uncompressed start offset of this Stream
+ *
+ * The offset is relative to the beginning of the lzma_index
+ * (i.e. usually the beginning of the .xz file).
+ */
+ lzma_vli uncompressed_offset;
+
+ /**
+ * \brief Compressed size of this Stream
+ *
+ * This includes all headers except the possible
+ * Stream Padding after this Stream.
+ */
+ lzma_vli compressed_size;
+
+ /**
+ * \brief Uncompressed size of this Stream
+ */
+ lzma_vli uncompressed_size;
+
+ /**
+ * \brief Size of Stream Padding after this Stream
+ *
+ * If it hasn't been set with lzma_index_stream_padding(),
+ * this defaults to zero. Stream Padding is always
+ * a multiple of four bytes.
+ */
+ lzma_vli padding;
+
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli1;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli2;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli3;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli4;
+ } stream;
+
+ struct {
+ /**
+ * \brief Block number in the file
+ *
+ * The first Block is 1.
+ */
+ lzma_vli number_in_file;
+
+ /**
+ * \brief Compressed start offset of this Block
+ *
+ * This offset is relative to the beginning of the
+ * lzma_index (i.e. usually the beginning of the .xz file).
+ * Normally this is where you should seek in the .xz file
+ * to start decompressing this Block.
+ */
+ lzma_vli compressed_file_offset;
+
+ /**
+ * \brief Uncompressed start offset of this Block
+ *
+ * This offset is relative to the beginning of the lzma_index
+ * (i.e. usually the beginning of the .xz file).
+ *
+ * When doing random-access reading, it is possible that
+ * the target offset is not exactly at Block boundary. One
+ * will need to compare the target offset against
+ * uncompressed_file_offset or uncompressed_stream_offset,
+ * and possibly decode and throw away some amount of data
+ * before reaching the target offset.
+ */
+ lzma_vli uncompressed_file_offset;
+
+ /**
+ * \brief Block number in this Stream
+ *
+ * The first Block is 1.
+ */
+ lzma_vli number_in_stream;
+
+ /**
+ * \brief Compressed start offset of this Block
+ *
+ * This offset is relative to the beginning of the Stream
+ * containing this Block.
+ */
+ lzma_vli compressed_stream_offset;
+
+ /**
+ * \brief Uncompressed start offset of this Block
+ *
+ * This offset is relative to the beginning of the Stream
+ * containing this Block.
+ */
+ lzma_vli uncompressed_stream_offset;
+
+ /**
+ * \brief Uncompressed size of this Block
+ *
+ * You should pass this to the Block decoder if you will
+ * decode this Block. It will allow the Block decoder to
+ * validate the uncompressed size.
+ */
+ lzma_vli uncompressed_size;
+
+ /**
+ * \brief Unpadded size of this Block
+ *
+ * You should pass this to the Block decoder if you will
+ * decode this Block. It will allow the Block decoder to
+ * validate the unpadded size.
+ */
+ lzma_vli unpadded_size;
+
+ /**
+ * \brief Total compressed size
+ *
+ * This includes all headers and padding in this Block.
+ * This is useful if you need to know how many bytes
+ * the Block decoder will actually read.
+ */
+ lzma_vli total_size;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli1;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli2;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli3;
+
+ /** \private Reserved member. */
+ lzma_vli reserved_vli4;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr2;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr3;
+
+ /** \private Reserved member. */
+ const void *reserved_ptr4;
+ } block;
+
+ /**
+ * \private Internal struct.
+ *
+ * Internal data which is used to store the state of the iterator.
+ * The exact format may vary between liblzma versions, so don't
+ * touch these in any way.
+ */
+ union {
+ /** \private Internal member. */
+ const void *p;
+
+ /** \private Internal member. */
+ size_t s;
+
+ /** \private Internal member. */
+ lzma_vli v;
+ } internal[6];
+} lzma_index_iter;
+
+
+/**
+ * \brief Operation mode for lzma_index_iter_next()
+ */
+typedef enum {
+ LZMA_INDEX_ITER_ANY = 0,
+ /**<
+ * \brief Get the next Block or Stream
+ *
+ * Go to the next Block if the current Stream has at least
+ * one Block left. Otherwise go to the next Stream even if
+ * it has no Blocks. If the Stream has no Blocks
+ * (lzma_index_iter.stream.block_count == 0),
+ * lzma_index_iter.block will have undefined values.
+ */
+
+ LZMA_INDEX_ITER_STREAM = 1,
+ /**<
+ * \brief Get the next Stream
+ *
+ * Go to the next Stream even if the current Stream has
+ * unread Blocks left. If the next Stream has at least one
+ * Block, the iterator will point to the first Block.
+ * If there are no Blocks, lzma_index_iter.block will have
+ * undefined values.
+ */
+
+ LZMA_INDEX_ITER_BLOCK = 2,
+ /**<
+ * \brief Get the next Block
+ *
+ * Go to the next Block if the current Stream has at least
+ * one Block left. If the current Stream has no Blocks left,
+ * the next Stream with at least one Block is located and
+ * the iterator will be made to point to the first Block of
+ * that Stream.
+ */
+
+ LZMA_INDEX_ITER_NONEMPTY_BLOCK = 3
+ /**<
+ * \brief Get the next non-empty Block
+ *
+ * This is like LZMA_INDEX_ITER_BLOCK except that it will
+ * skip Blocks whose Uncompressed Size is zero.
+ */
+
+} lzma_index_iter_mode;
+
+
+/**
+ * \brief Calculate memory usage of lzma_index
+ *
+ * On disk, the size of the Index field depends on both the number of Records
+ * stored and the size of the Records (due to variable-length integer
+ * encoding). When the Index is kept in lzma_index structure, the memory usage
+ * depends only on the number of Records/Blocks stored in the Index(es), and
+ * in case of concatenated lzma_indexes, the number of Streams. The size in
+ * RAM is almost always significantly bigger than in the encoded form on disk.
+ *
+ * This function calculates an approximate amount of memory needed to hold
+ * the given number of Streams and Blocks in lzma_index structure. This
+ * value may vary between CPU architectures and also between liblzma versions
+ * if the internal implementation is modified.
+ *
+ * \param streams Number of Streams
+ * \param blocks Number of Blocks
+ *
+ * \return Approximate memory in bytes needed in a lzma_index structure.
+ */
+extern LZMA_API(uint64_t) lzma_index_memusage(
+ lzma_vli streams, lzma_vli blocks) lzma_nothrow;
+
+
+/**
+ * \brief Calculate the memory usage of an existing lzma_index
+ *
+ * This is a shorthand for lzma_index_memusage(lzma_index_stream_count(i),
+ * lzma_index_block_count(i)).
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Approximate memory in bytes used by the lzma_index structure.
+ */
+extern LZMA_API(uint64_t) lzma_index_memused(const lzma_index *i)
+ lzma_nothrow;
+
+
+/**
+ * \brief Allocate and initialize a new lzma_index structure
+ *
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return On success, a pointer to an empty initialized lzma_index is
+ * returned. If allocation fails, NULL is returned.
+ */
+extern LZMA_API(lzma_index *) lzma_index_init(const lzma_allocator *allocator)
+ lzma_nothrow;
+
+
+/**
+ * \brief Deallocate lzma_index
+ *
+ * If i is NULL, this does nothing.
+ *
+ * \param i Pointer to lzma_index structure to deallocate
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ */
+extern LZMA_API(void) lzma_index_end(
+ lzma_index *i, const lzma_allocator *allocator) lzma_nothrow;
+
+
+/**
+ * \brief Add a new Block to lzma_index
+ *
+ * \param i Pointer to a lzma_index structure
+ * \param allocator lzma_allocator for custom allocator
+ * functions. Set to NULL to use malloc()
+ * and free().
+ * \param unpadded_size Unpadded Size of a Block. This can be
+ * calculated with lzma_block_unpadded_size()
+ * after encoding or decoding the Block.
+ * \param uncompressed_size Uncompressed Size of a Block. This can be
+ * taken directly from lzma_block structure
+ * after encoding or decoding the Block.
+ *
+ * Appending a new Block does not invalidate iterators. For example,
+ * if an iterator was pointing to the end of the lzma_index, after
+ * lzma_index_append() it is possible to read the next Block with
+ * an existing iterator.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_DATA_ERROR: Compressed or uncompressed size of the
+ * Stream or size of the Index field would grow too big.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_append(
+ lzma_index *i, const lzma_allocator *allocator,
+ lzma_vli unpadded_size, lzma_vli uncompressed_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Set the Stream Flags
+ *
+ * Set the Stream Flags of the last (and typically the only) Stream
+ * in lzma_index. This can be useful when reading information from the
+ * lzma_index, because to decode Blocks, knowing the integrity check type
+ * is needed.
+ *
+ * \param i Pointer to lzma_index structure
+ * \param stream_flags Pointer to lzma_stream_flags structure. This
+ * is copied into the internal preallocated
+ * structure, so the caller doesn't need to keep
+ * the flags' data available after calling this
+ * function.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_OPTIONS_ERROR: Unsupported stream_flags->version.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_stream_flags(
+ lzma_index *i, const lzma_stream_flags *stream_flags)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Get the types of integrity Checks
+ *
+ * If lzma_index_stream_flags() is used to set the Stream Flags for
+ * every Stream, lzma_index_checks() can be used to get a bitmask to
+ * indicate which Check types have been used. It can be useful e.g. if
+ * showing the Check types to the user.
+ *
+ * The bitmask is 1 << check_id, e.g. CRC32 is 1 << 1 and SHA-256 is 1 << 10.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Bitmask indicating which Check types are used in the lzma_index
+ */
+extern LZMA_API(uint32_t) lzma_index_checks(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Set the amount of Stream Padding
+ *
+ * Set the amount of Stream Padding of the last (and typically the only)
+ * Stream in the lzma_index. This is needed when planning to do random-access
+ * reading within multiple concatenated Streams.
+ *
+ * By default, the amount of Stream Padding is assumed to be zero bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_DATA_ERROR: The file size would grow too big.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_stream_padding(
+ lzma_index *i, lzma_vli stream_padding)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Get the number of Streams
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Number of Streams in the lzma_index
+ */
+extern LZMA_API(lzma_vli) lzma_index_stream_count(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the number of Blocks
+ *
+ * This returns the total number of Blocks in lzma_index. To get number
+ * of Blocks in individual Streams, use lzma_index_iter.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Number of blocks in the lzma_index
+ */
+extern LZMA_API(lzma_vli) lzma_index_block_count(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the size of the Index field as bytes
+ *
+ * This is needed to verify the Backward Size field in the Stream Footer.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Size in bytes of the Index
+ */
+extern LZMA_API(lzma_vli) lzma_index_size(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the total size of the Stream
+ *
+ * If multiple lzma_indexes have been combined, this works as if the Blocks
+ * were in a single Stream. This is useful if you are going to combine
+ * Blocks from multiple Streams into a single new Stream.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Size in bytes of the Stream (if all Blocks are combined
+ * into one Stream).
+ */
+extern LZMA_API(lzma_vli) lzma_index_stream_size(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the total size of the Blocks
+ *
+ * This doesn't include the Stream Header, Stream Footer, Stream Padding,
+ * or Index fields.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Size in bytes of all Blocks in the Stream(s)
+ */
+extern LZMA_API(lzma_vli) lzma_index_total_size(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the total size of the file
+ *
+ * When no lzma_indexes have been combined with lzma_index_cat() and there is
+ * no Stream Padding, this function is identical to lzma_index_stream_size().
+ * If multiple lzma_indexes have been combined, this includes also the headers
+ * of each separate Stream and the possible Stream Padding fields.
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Total size of the .xz file in bytes
+ */
+extern LZMA_API(lzma_vli) lzma_index_file_size(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Get the uncompressed size of the file
+ *
+ * \param i Pointer to lzma_index structure
+ *
+ * \return Size in bytes of the uncompressed data in the file
+ */
+extern LZMA_API(lzma_vli) lzma_index_uncompressed_size(const lzma_index *i)
+ lzma_nothrow lzma_attr_pure;
+
+
+/**
+ * \brief Initialize an iterator
+ *
+ * This function associates the iterator with the given lzma_index, and calls
+ * lzma_index_iter_rewind() on the iterator.
+ *
+ * This function doesn't allocate any memory, thus there is no
+ * lzma_index_iter_end(). The iterator is valid as long as the
+ * associated lzma_index is valid, that is, until lzma_index_end() or
+ * using it as source in lzma_index_cat(). Specifically, lzma_index doesn't
+ * become invalid if new Blocks are added to it with lzma_index_append() or
+ * if it is used as the destination in lzma_index_cat().
+ *
+ * It is safe to make copies of an initialized lzma_index_iter, for example,
+ * to easily restart reading at some particular position.
+ *
+ * \param iter Pointer to a lzma_index_iter structure
+ * \param i lzma_index to which the iterator will be associated
+ */
+extern LZMA_API(void) lzma_index_iter_init(
+ lzma_index_iter *iter, const lzma_index *i) lzma_nothrow;
+
+
+/**
+ * \brief Rewind the iterator
+ *
+ * Rewind the iterator so that next call to lzma_index_iter_next() will
+ * return the first Block or Stream.
+ *
+ * \param iter Pointer to a lzma_index_iter structure
+ */
+extern LZMA_API(void) lzma_index_iter_rewind(lzma_index_iter *iter)
+ lzma_nothrow;
+
+
+/**
+ * \brief Get the next Block or Stream
+ *
+ * \param iter Iterator initialized with lzma_index_iter_init()
+ * \param mode Specify what kind of information the caller wants
+ * to get. See lzma_index_iter_mode for details.
+ *
+ * \return lzma_bool:
+ * - true if no Block or Stream matching the mode is found.
+ * *iter is not updated (failure).
+ * - false if the next Block or Stream matching the mode was
+ * found. *iter is updated (success).
+ */
+extern LZMA_API(lzma_bool) lzma_index_iter_next(
+ lzma_index_iter *iter, lzma_index_iter_mode mode)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Locate a Block
+ *
+ * If it is possible to seek in the .xz file, it is possible to parse
+ * the Index field(s) and use lzma_index_iter_locate() to do random-access
+ * reading with granularity of Block size.
+ *
+ * If the target is smaller than the uncompressed size of the Stream (can be
+ * checked with lzma_index_uncompressed_size()):
+ * - Information about the Stream and Block containing the requested
+ * uncompressed offset is stored into *iter.
+ * - Internal state of the iterator is adjusted so that
+ * lzma_index_iter_next() can be used to read subsequent Blocks or Streams.
+ *
+ * If the target is greater than the uncompressed size of the Stream, *iter
+ * is not modified.
+ *
+ * \param iter Iterator that was earlier initialized with
+ * lzma_index_iter_init().
+ * \param target Uncompressed target offset which the caller would
+ * like to locate from the Stream
+ *
+ * \return lzma_bool:
+ * - true if the target is greater than or equal to the
+ * uncompressed size of the Stream (failure)
+ * - false if the target is smaller than the uncompressed size
+ * of the Stream (success)
+ */
+extern LZMA_API(lzma_bool) lzma_index_iter_locate(
+ lzma_index_iter *iter, lzma_vli target) lzma_nothrow;
+
+
+/**
+ * \brief Concatenate lzma_indexes
+ *
+ * Concatenating lzma_indexes is useful when doing random-access reading in
+ * multi-Stream .xz file, or when combining multiple Streams into single
+ * Stream.
+ *
+ * \param[out] dest lzma_index after which src is appended
+ * \param src lzma_index to be appended after dest. If this
+ * function succeeds, the memory allocated for src
+ * is freed or moved to be part of dest, and all
+ * iterators pointing to src will become invalid.
+* \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: lzma_indexes were concatenated successfully.
+ * src is now a dangling pointer.
+ * - LZMA_DATA_ERROR: *dest would grow too big.
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_cat(lzma_index *dest, lzma_index *src,
+ const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Duplicate lzma_index
+ *
+ * \param i Pointer to lzma_index structure to be duplicated
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return A copy of the lzma_index, or NULL if memory allocation failed.
+ */
+extern LZMA_API(lzma_index *) lzma_index_dup(
+ const lzma_index *i, const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .xz Index encoder
+ *
+ * \param strm Pointer to properly prepared lzma_stream
+ * \param i Pointer to lzma_index which should be encoded.
+ *
+ * The valid `action' values for lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * It is enough to use only one of them (you can choose freely).
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization succeeded, continue with lzma_code().
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_encoder(
+ lzma_stream *strm, const lzma_index *i)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Initialize .xz Index decoder
+ *
+ * \param strm Pointer to properly prepared lzma_stream
+ * \param[out] i The decoded Index will be made available via
+ * this pointer. Initially this function will
+ * set *i to NULL (the old value is ignored). If
+ * decoding succeeds (lzma_code() returns
+ * LZMA_STREAM_END), *i will be set to point
+ * to a new lzma_index, which the application
+ * has to later free with lzma_index_end().
+ * \param memlimit How much memory the resulting lzma_index is
+ * allowed to require. liblzma 5.2.3 and earlier
+ * don't allow 0 here and return LZMA_PROG_ERROR;
+ * later versions treat 0 as if 1 had been specified.
+ *
+ * Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * There is no need to use LZMA_FINISH, but it's allowed because it may
+ * simplify certain types of applications.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Initialization succeeded, continue with lzma_code().
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ *
+ * \note liblzma 5.2.3 and older list also LZMA_MEMLIMIT_ERROR here
+ * but that error code has never been possible from this
+ * initialization function.
+ */
+extern LZMA_API(lzma_ret) lzma_index_decoder(
+ lzma_stream *strm, lzma_index **i, uint64_t memlimit)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Single-call .xz Index encoder
+ *
+ * \note This function doesn't take allocator argument since all
+ * the internal data is allocated on stack.
+ *
+ * \param i lzma_index to be encoded
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * *out_pos is updated only if encoding succeeds.
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_BUF_ERROR: Output buffer is too small. Use
+ * lzma_index_size() to find out how much output
+ * space is needed.
+ * - LZMA_PROG_ERROR
+ *
+ */
+extern LZMA_API(lzma_ret) lzma_index_buffer_encode(const lzma_index *i,
+ uint8_t *out, size_t *out_pos, size_t out_size) lzma_nothrow;
+
+
+/**
+ * \brief Single-call .xz Index decoder
+ *
+ * \param[out] i If decoding succeeds, *i will point to a new
+ * lzma_index, which the application has to
+ * later free with lzma_index_end(). If an error
+ * occurs, *i will be NULL. The old value of *i
+ * is always ignored and thus doesn't need to be
+ * initialized by the caller.
+ * \param[out] memlimit Pointer to how much memory the resulting
+ * lzma_index is allowed to require. The value
+ * pointed by this pointer is modified if and only
+ * if LZMA_MEMLIMIT_ERROR is returned.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ * \param in Beginning of the input buffer
+ * \param in_pos The next byte will be read from in[*in_pos].
+ * *in_pos is updated only if decoding succeeds.
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_MEM_ERROR
+ * - LZMA_MEMLIMIT_ERROR: Memory usage limit was reached.
+ * The minimum required memlimit value was stored to *memlimit.
+ * - LZMA_DATA_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_buffer_decode(lzma_index **i,
+ uint64_t *memlimit, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+ lzma_nothrow;
+
+
+/**
+ * \brief Initialize a .xz file information decoder
+ *
+ * This decoder decodes the Stream Header, Stream Footer, Index, and
+ * Stream Padding field(s) from the input .xz file and stores the resulting
+ * combined index in *dest_index. This information can be used to get the
+ * uncompressed file size with lzma_index_uncompressed_size(*dest_index) or,
+ * for example, to implement random access reading by locating the Blocks
+ * in the Streams.
+ *
+ * To get the required information from the .xz file, lzma_code() may ask
+ * the application to seek in the input file by returning LZMA_SEEK_NEEDED
+ * and having the target file position specified in lzma_stream.seek_pos.
+ * The number of seeks required depends on the input file and how big buffers
+ * the application provides. When possible, the decoder will seek backward
+ * and forward in the given buffer to avoid useless seek requests. Thus, if
+ * the application provides the whole file at once, no external seeking will
+ * be required (that is, lzma_code() won't return LZMA_SEEK_NEEDED).
+ *
+ * The value in lzma_stream.total_in can be used to estimate how much data
+ * liblzma had to read to get the file information. However, due to seeking
+ * and the way total_in is updated, the value of total_in will be somewhat
+ * inaccurate (a little too big). Thus, total_in is a good estimate but don't
+ * expect to see the same exact value for the same file if you change the
+ * input buffer size or switch to a different liblzma version.
+ *
+ * Valid `action' arguments to lzma_code() are LZMA_RUN and LZMA_FINISH.
+ * You only need to use LZMA_RUN; LZMA_FINISH is only supported because it
+ * might be convenient for some applications. If you use LZMA_FINISH and if
+ * lzma_code() asks the application to seek, remember to reset `action' back
+ * to LZMA_RUN unless you hit the end of the file again.
+ *
+ * Possible return values from lzma_code():
+ * - LZMA_OK: All OK so far, more input needed
+ * - LZMA_SEEK_NEEDED: Provide more input starting from the absolute
+ * file position strm->seek_pos
+ * - LZMA_STREAM_END: Decoding was successful, *dest_index has been set
+ * - LZMA_FORMAT_ERROR: The input file is not in the .xz format (the
+ * expected magic bytes were not found from the beginning of the file)
+ * - LZMA_OPTIONS_ERROR: File looks valid but contains headers that aren't
+ * supported by this version of liblzma
+ * - LZMA_DATA_ERROR: File is corrupt
+ * - LZMA_BUF_ERROR
+ * - LZMA_MEM_ERROR
+ * - LZMA_MEMLIMIT_ERROR
+ * - LZMA_PROG_ERROR
+ *
+ * \param strm Pointer to a properly prepared lzma_stream
+ * \param[out] dest_index Pointer to a pointer where the decoder will put
+ * the decoded lzma_index. The old value
+ * of *dest_index is ignored (not freed).
+ * \param memlimit How much memory the resulting lzma_index is
+ * allowed to require. Use UINT64_MAX to
+ * effectively disable the limiter.
+ * \param file_size Size of the input .xz file
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_MEM_ERROR
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_file_info_decoder(
+ lzma_stream *strm, lzma_index **dest_index,
+ uint64_t memlimit, uint64_t file_size)
+ lzma_nothrow;
diff --git a/src/liblzma/api/lzma/index_hash.h b/src/liblzma/api/lzma/index_hash.h
new file mode 100644
index 0000000..a2d4c48
--- /dev/null
+++ b/src/liblzma/api/lzma/index_hash.h
@@ -0,0 +1,124 @@
+/**
+ * \file lzma/index_hash.h
+ * \brief Validate Index by using a hash function
+ * \note Never include this file directly. Use <lzma.h> instead.
+ *
+ * Hashing makes it possible to use constant amount of memory to validate
+ * Index of arbitrary size.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+/**
+ * \brief Opaque data type to hold the Index hash
+ */
+typedef struct lzma_index_hash_s lzma_index_hash;
+
+
+/**
+ * \brief Allocate and initialize a new lzma_index_hash structure
+ *
+ * If index_hash is NULL, this function allocates and initializes a new
+ * lzma_index_hash structure and returns a pointer to it. If allocation
+ * fails, NULL is returned.
+ *
+ * If index_hash is non-NULL, this function reinitializes the lzma_index_hash
+ * structure and returns the same pointer. In this case, return value cannot
+ * be NULL or a different pointer than the index_hash that was given as
+ * an argument.
+ *
+ * \param index_hash Pointer to a lzma_index_hash structure or NULL.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ *
+ * \return Initialized lzma_index_hash structure on success or
+ * NULL on failure.
+ */
+extern LZMA_API(lzma_index_hash *) lzma_index_hash_init(
+ lzma_index_hash *index_hash, const lzma_allocator *allocator)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Deallocate lzma_index_hash structure
+ *
+ * \param index_hash Pointer to a lzma_index_hash structure to free.
+ * \param allocator lzma_allocator for custom allocator functions.
+ * Set to NULL to use malloc() and free().
+ */
+extern LZMA_API(void) lzma_index_hash_end(
+ lzma_index_hash *index_hash, const lzma_allocator *allocator)
+ lzma_nothrow;
+
+
+/**
+ * \brief Add a new Record to an Index hash
+ *
+ * \param index_hash Pointer to a lzma_index_hash structure
+ * \param unpadded_size Unpadded Size of a Block
+ * \param uncompressed_size Uncompressed Size of a Block
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK
+ * - LZMA_DATA_ERROR: Compressed or uncompressed size of the
+ * Stream or size of the Index field would grow too big.
+ * - LZMA_PROG_ERROR: Invalid arguments or this function is being
+ * used when lzma_index_hash_decode() has already been used.
+ */
+extern LZMA_API(lzma_ret) lzma_index_hash_append(lzma_index_hash *index_hash,
+ lzma_vli unpadded_size, lzma_vli uncompressed_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode and validate the Index field
+ *
+ * After telling the sizes of all Blocks with lzma_index_hash_append(),
+ * the actual Index field is decoded with this function. Specifically,
+ * once decoding of the Index field has been started, no more Records
+ * can be added using lzma_index_hash_append().
+ *
+ * This function doesn't use lzma_stream structure to pass the input data.
+ * Instead, the input buffer is specified using three arguments. This is
+ * because it matches better the internal APIs of liblzma.
+ *
+ * \param index_hash Pointer to a lzma_index_hash structure
+ * \param in Pointer to the beginning of the input buffer
+ * \param[out] in_pos in[*in_pos] is the next byte to process
+ * \param in_size in[in_size] is the first byte not to process
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: So far good, but more input is needed.
+ * - LZMA_STREAM_END: Index decoded successfully and it matches
+ * the Records given with lzma_index_hash_append().
+ * - LZMA_DATA_ERROR: Index is corrupt or doesn't match the
+ * information given with lzma_index_hash_append().
+ * - LZMA_BUF_ERROR: Cannot progress because *in_pos >= in_size.
+ * - LZMA_PROG_ERROR
+ */
+extern LZMA_API(lzma_ret) lzma_index_hash_decode(lzma_index_hash *index_hash,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Get the size of the Index field as bytes
+ *
+ * This is needed to verify the Backward Size field in the Stream Footer.
+ *
+ * \param index_hash Pointer to a lzma_index_hash structure
+ *
+ * \return Size of the Index field in bytes.
+ */
+extern LZMA_API(lzma_vli) lzma_index_hash_size(
+ const lzma_index_hash *index_hash)
+ lzma_nothrow lzma_attr_pure;
diff --git a/src/liblzma/api/lzma/lzma12.h b/src/liblzma/api/lzma/lzma12.h
new file mode 100644
index 0000000..8ef6ea5
--- /dev/null
+++ b/src/liblzma/api/lzma/lzma12.h
@@ -0,0 +1,569 @@
+/**
+ * \file lzma/lzma12.h
+ * \brief LZMA1 and LZMA2 filters
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief LZMA1 Filter ID (for raw encoder/decoder only, not in .xz)
+ *
+ * LZMA1 is the very same thing as what was called just LZMA in LZMA Utils,
+ * 7-Zip, and LZMA SDK. It's called LZMA1 here to prevent developers from
+ * accidentally using LZMA when they actually want LZMA2.
+ */
+#define LZMA_FILTER_LZMA1 LZMA_VLI_C(0x4000000000000001)
+
+/**
+ * \brief LZMA1 Filter ID with extended options (for raw encoder/decoder)
+ *
+ * This is like LZMA_FILTER_LZMA1 but with this ID a few extra options
+ * are supported in the lzma_options_lzma structure:
+ *
+ * - A flag to tell the encoder if the end of payload marker (EOPM) alias
+ * end of stream (EOS) marker must be written at the end of the stream.
+ * In contrast, LZMA_FILTER_LZMA1 always writes the end marker.
+ *
+ * - Decoder needs to be told the uncompressed size of the stream
+ * or that it is unknown (using the special value UINT64_MAX).
+ * If the size is known, a flag can be set to allow the presence of
+ * the end marker anyway. In contrast, LZMA_FILTER_LZMA1 always
+ * behaves as if the uncompressed size was unknown.
+ *
+ * This allows handling file formats where LZMA1 streams are used but where
+ * the end marker isn't allowed or where it might not (always) be present.
+ * This extended LZMA1 functionality is provided as a Filter ID for raw
+ * encoder and decoder instead of adding new encoder and decoder initialization
+ * functions because this way it is possible to also use extra filters,
+ * for example, LZMA_FILTER_X86 in a filter chain with LZMA_FILTER_LZMA1EXT,
+ * which might be needed to handle some file formats.
+ */
+#define LZMA_FILTER_LZMA1EXT LZMA_VLI_C(0x4000000000000002)
+
+/**
+ * \brief LZMA2 Filter ID
+ *
+ * Usually you want this instead of LZMA1. Compared to LZMA1, LZMA2 adds
+ * support for LZMA_SYNC_FLUSH, uncompressed chunks (smaller expansion
+ * when trying to compress incompressible data), possibility to change
+ * lc/lp/pb in the middle of encoding, and some other internal improvements.
+ */
+#define LZMA_FILTER_LZMA2 LZMA_VLI_C(0x21)
+
+
+/**
+ * \brief Match finders
+ *
+ * Match finder has major effect on both speed and compression ratio.
+ * Usually hash chains are faster than binary trees.
+ *
+ * If you will use LZMA_SYNC_FLUSH often, the hash chains may be a better
+ * choice, because binary trees get much higher compression ratio penalty
+ * with LZMA_SYNC_FLUSH.
+ *
+ * The memory usage formulas are only rough estimates, which are closest to
+ * reality when dict_size is a power of two. The formulas are more complex
+ * in reality, and can also change a little between liblzma versions. Use
+ * lzma_raw_encoder_memusage() to get more accurate estimate of memory usage.
+ */
+typedef enum {
+ LZMA_MF_HC3 = 0x03,
+ /**<
+ * \brief Hash Chain with 2- and 3-byte hashing
+ *
+ * Minimum nice_len: 3
+ *
+ * Memory usage:
+ * - dict_size <= 16 MiB: dict_size * 7.5
+ * - dict_size > 16 MiB: dict_size * 5.5 + 64 MiB
+ */
+
+ LZMA_MF_HC4 = 0x04,
+ /**<
+ * \brief Hash Chain with 2-, 3-, and 4-byte hashing
+ *
+ * Minimum nice_len: 4
+ *
+ * Memory usage:
+ * - dict_size <= 32 MiB: dict_size * 7.5
+ * - dict_size > 32 MiB: dict_size * 6.5
+ */
+
+ LZMA_MF_BT2 = 0x12,
+ /**<
+ * \brief Binary Tree with 2-byte hashing
+ *
+ * Minimum nice_len: 2
+ *
+ * Memory usage: dict_size * 9.5
+ */
+
+ LZMA_MF_BT3 = 0x13,
+ /**<
+ * \brief Binary Tree with 2- and 3-byte hashing
+ *
+ * Minimum nice_len: 3
+ *
+ * Memory usage:
+ * - dict_size <= 16 MiB: dict_size * 11.5
+ * - dict_size > 16 MiB: dict_size * 9.5 + 64 MiB
+ */
+
+ LZMA_MF_BT4 = 0x14
+ /**<
+ * \brief Binary Tree with 2-, 3-, and 4-byte hashing
+ *
+ * Minimum nice_len: 4
+ *
+ * Memory usage:
+ * - dict_size <= 32 MiB: dict_size * 11.5
+ * - dict_size > 32 MiB: dict_size * 10.5
+ */
+} lzma_match_finder;
+
+
+/**
+ * \brief Test if given match finder is supported
+ *
+ * It is safe to call this with a value that isn't listed in
+ * lzma_match_finder enumeration; the return value will be false.
+ *
+ * There is no way to list which match finders are available in this
+ * particular liblzma version and build. It would be useless, because
+ * a new match finder, which the application developer wasn't aware,
+ * could require giving additional options to the encoder that the older
+ * match finders don't need.
+ *
+ * \param match_finder Match finder ID
+ *
+ * \return lzma_bool:
+ * - true if the match finder is supported by this liblzma build.
+ * - false otherwise.
+ */
+extern LZMA_API(lzma_bool) lzma_mf_is_supported(lzma_match_finder match_finder)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Compression modes
+ *
+ * This selects the function used to analyze the data produced by the match
+ * finder.
+ */
+typedef enum {
+ LZMA_MODE_FAST = 1,
+ /**<
+ * \brief Fast compression
+ *
+ * Fast mode is usually at its best when combined with
+ * a hash chain match finder.
+ */
+
+ LZMA_MODE_NORMAL = 2
+ /**<
+ * \brief Normal compression
+ *
+ * This is usually notably slower than fast mode. Use this
+ * together with binary tree match finders to expose the
+ * full potential of the LZMA1 or LZMA2 encoder.
+ */
+} lzma_mode;
+
+
+/**
+ * \brief Test if given compression mode is supported
+ *
+ * It is safe to call this with a value that isn't listed in lzma_mode
+ * enumeration; the return value will be false.
+ *
+ * There is no way to list which modes are available in this particular
+ * liblzma version and build. It would be useless, because a new compression
+ * mode, which the application developer wasn't aware, could require giving
+ * additional options to the encoder that the older modes don't need.
+ *
+ * \param mode Mode ID.
+ *
+ * \return lzma_bool:
+ * - true if the compression mode is supported by this liblzma
+ * build.
+ * - false otherwise.
+ */
+extern LZMA_API(lzma_bool) lzma_mode_is_supported(lzma_mode mode)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Options specific to the LZMA1 and LZMA2 filters
+ *
+ * Since LZMA1 and LZMA2 share most of the code, it's simplest to share
+ * the options structure too. For encoding, all but the reserved variables
+ * need to be initialized unless specifically mentioned otherwise.
+ * lzma_lzma_preset() can be used to get a good starting point.
+ *
+ * For raw decoding, both LZMA1 and LZMA2 need dict_size, preset_dict, and
+ * preset_dict_size (if preset_dict != NULL). LZMA1 needs also lc, lp, and pb.
+ */
+typedef struct {
+ /**
+ * \brief Dictionary size in bytes
+ *
+ * Dictionary size indicates how many bytes of the recently processed
+ * uncompressed data is kept in memory. One method to reduce size of
+ * the uncompressed data is to store distance-length pairs, which
+ * indicate what data to repeat from the dictionary buffer. Thus,
+ * the bigger the dictionary, the better the compression ratio
+ * usually is.
+ *
+ * Maximum size of the dictionary depends on multiple things:
+ * - Memory usage limit
+ * - Available address space (not a problem on 64-bit systems)
+ * - Selected match finder (encoder only)
+ *
+ * Currently the maximum dictionary size for encoding is 1.5 GiB
+ * (i.e. (UINT32_C(1) << 30) + (UINT32_C(1) << 29)) even on 64-bit
+ * systems for certain match finder implementation reasons. In the
+ * future, there may be match finders that support bigger
+ * dictionaries.
+ *
+ * Decoder already supports dictionaries up to 4 GiB - 1 B (i.e.
+ * UINT32_MAX), so increasing the maximum dictionary size of the
+ * encoder won't cause problems for old decoders.
+ *
+ * Because extremely small dictionaries sizes would have unneeded
+ * overhead in the decoder, the minimum dictionary size is 4096 bytes.
+ *
+ * \note When decoding, too big dictionary does no other harm
+ * than wasting memory.
+ */
+ uint32_t dict_size;
+# define LZMA_DICT_SIZE_MIN UINT32_C(4096)
+# define LZMA_DICT_SIZE_DEFAULT (UINT32_C(1) << 23)
+
+ /**
+ * \brief Pointer to an initial dictionary
+ *
+ * It is possible to initialize the LZ77 history window using
+ * a preset dictionary. It is useful when compressing many
+ * similar, relatively small chunks of data independently from
+ * each other. The preset dictionary should contain typical
+ * strings that occur in the files being compressed. The most
+ * probable strings should be near the end of the preset dictionary.
+ *
+ * This feature should be used only in special situations. For
+ * now, it works correctly only with raw encoding and decoding.
+ * Currently none of the container formats supported by
+ * liblzma allow preset dictionary when decoding, thus if
+ * you create a .xz or .lzma file with preset dictionary, it
+ * cannot be decoded with the regular decoder functions. In the
+ * future, the .xz format will likely get support for preset
+ * dictionary though.
+ */
+ const uint8_t *preset_dict;
+
+ /**
+ * \brief Size of the preset dictionary
+ *
+ * Specifies the size of the preset dictionary. If the size is
+ * bigger than dict_size, only the last dict_size bytes are
+ * processed.
+ *
+ * This variable is read only when preset_dict is not NULL.
+ * If preset_dict is not NULL but preset_dict_size is zero,
+ * no preset dictionary is used (identical to only setting
+ * preset_dict to NULL).
+ */
+ uint32_t preset_dict_size;
+
+ /**
+ * \brief Number of literal context bits
+ *
+ * How many of the highest bits of the previous uncompressed
+ * eight-bit byte (also known as `literal') are taken into
+ * account when predicting the bits of the next literal.
+ *
+ * E.g. in typical English text, an upper-case letter is
+ * often followed by a lower-case letter, and a lower-case
+ * letter is usually followed by another lower-case letter.
+ * In the US-ASCII character set, the highest three bits are 010
+ * for upper-case letters and 011 for lower-case letters.
+ * When lc is at least 3, the literal coding can take advantage of
+ * this property in the uncompressed data.
+ *
+ * There is a limit that applies to literal context bits and literal
+ * position bits together: lc + lp <= 4. Without this limit the
+ * decoding could become very slow, which could have security related
+ * results in some cases like email servers doing virus scanning.
+ * This limit also simplifies the internal implementation in liblzma.
+ *
+ * There may be LZMA1 streams that have lc + lp > 4 (maximum possible
+ * lc would be 8). It is not possible to decode such streams with
+ * liblzma.
+ */
+ uint32_t lc;
+# define LZMA_LCLP_MIN 0
+# define LZMA_LCLP_MAX 4
+# define LZMA_LC_DEFAULT 3
+
+ /**
+ * \brief Number of literal position bits
+ *
+ * lp affects what kind of alignment in the uncompressed data is
+ * assumed when encoding literals. A literal is a single 8-bit byte.
+ * See pb below for more information about alignment.
+ */
+ uint32_t lp;
+# define LZMA_LP_DEFAULT 0
+
+ /**
+ * \brief Number of position bits
+ *
+ * pb affects what kind of alignment in the uncompressed data is
+ * assumed in general. The default means four-byte alignment
+ * (2^ pb =2^2=4), which is often a good choice when there's
+ * no better guess.
+ *
+ * When the alignment is known, setting pb accordingly may reduce
+ * the file size a little. E.g. with text files having one-byte
+ * alignment (US-ASCII, ISO-8859-*, UTF-8), setting pb=0 can
+ * improve compression slightly. For UTF-16 text, pb=1 is a good
+ * choice. If the alignment is an odd number like 3 bytes, pb=0
+ * might be the best choice.
+ *
+ * Even though the assumed alignment can be adjusted with pb and
+ * lp, LZMA1 and LZMA2 still slightly favor 16-byte alignment.
+ * It might be worth taking into account when designing file formats
+ * that are likely to be often compressed with LZMA1 or LZMA2.
+ */
+ uint32_t pb;
+# define LZMA_PB_MIN 0
+# define LZMA_PB_MAX 4
+# define LZMA_PB_DEFAULT 2
+
+ /** Compression mode */
+ lzma_mode mode;
+
+ /**
+ * \brief Nice length of a match
+ *
+ * This determines how many bytes the encoder compares from the match
+ * candidates when looking for the best match. Once a match of at
+ * least nice_len bytes long is found, the encoder stops looking for
+ * better candidates and encodes the match. (Naturally, if the found
+ * match is actually longer than nice_len, the actual length is
+ * encoded; it's not truncated to nice_len.)
+ *
+ * Bigger values usually increase the compression ratio and
+ * compression time. For most files, 32 to 128 is a good value,
+ * which gives very good compression ratio at good speed.
+ *
+ * The exact minimum value depends on the match finder. The maximum
+ * is 273, which is the maximum length of a match that LZMA1 and
+ * LZMA2 can encode.
+ */
+ uint32_t nice_len;
+
+ /** Match finder ID */
+ lzma_match_finder mf;
+
+ /**
+ * \brief Maximum search depth in the match finder
+ *
+ * For every input byte, match finder searches through the hash chain
+ * or binary tree in a loop, each iteration going one step deeper in
+ * the chain or tree. The searching stops if
+ * - a match of at least nice_len bytes long is found;
+ * - all match candidates from the hash chain or binary tree have
+ * been checked; or
+ * - maximum search depth is reached.
+ *
+ * Maximum search depth is needed to prevent the match finder from
+ * wasting too much time in case there are lots of short match
+ * candidates. On the other hand, stopping the search before all
+ * candidates have been checked can reduce compression ratio.
+ *
+ * Setting depth to zero tells liblzma to use an automatic default
+ * value, that depends on the selected match finder and nice_len.
+ * The default is in the range [4, 200] or so (it may vary between
+ * liblzma versions).
+ *
+ * Using a bigger depth value than the default can increase
+ * compression ratio in some cases. There is no strict maximum value,
+ * but high values (thousands or millions) should be used with care:
+ * the encoder could remain fast enough with typical input, but
+ * malicious input could cause the match finder to slow down
+ * dramatically, possibly creating a denial of service attack.
+ */
+ uint32_t depth;
+
+ /**
+ * \brief For LZMA_FILTER_LZMA1EXT: Extended flags
+ *
+ * This is used only with LZMA_FILTER_LZMA1EXT.
+ *
+ * Currently only one flag is supported, LZMA_LZMA1EXT_ALLOW_EOPM:
+ *
+ * - Encoder: If the flag is set, then end marker is written just
+ * like it is with LZMA_FILTER_LZMA1. Without this flag the
+ * end marker isn't written and the application has to store
+ * the uncompressed size somewhere outside the compressed stream.
+ * To decompress streams without the end marker, the application
+ * has to set the correct uncompressed size in ext_size_low and
+ * ext_size_high.
+ *
+ * - Decoder: If the uncompressed size in ext_size_low and
+ * ext_size_high is set to the special value UINT64_MAX
+ * (indicating unknown uncompressed size) then this flag is
+ * ignored and the end marker must always be present, that is,
+ * the behavior is identical to LZMA_FILTER_LZMA1.
+ *
+ * Otherwise, if this flag isn't set, then the input stream
+ * must not have the end marker; if the end marker is detected
+ * then it will result in LZMA_DATA_ERROR. This is useful when
+ * it is known that the stream must not have the end marker and
+ * strict validation is wanted.
+ *
+ * If this flag is set, then it is autodetected if the end marker
+ * is present after the specified number of uncompressed bytes
+ * has been decompressed (ext_size_low and ext_size_high). The
+ * end marker isn't allowed in any other position. This behavior
+ * is useful when uncompressed size is known but the end marker
+ * may or may not be present. This is the case, for example,
+ * in .7z files (valid .7z files that have the end marker in
+ * LZMA1 streams are rare but they do exist).
+ */
+ uint32_t ext_flags;
+# define LZMA_LZMA1EXT_ALLOW_EOPM UINT32_C(0x01)
+
+ /**
+ * \brief For LZMA_FILTER_LZMA1EXT: Uncompressed size (low bits)
+ *
+ * The 64-bit uncompressed size is needed for decompression with
+ * LZMA_FILTER_LZMA1EXT. The size is ignored by the encoder.
+ *
+ * The special value UINT64_MAX indicates that the uncompressed size
+ * is unknown and that the end of payload marker (also known as
+ * end of stream marker) must be present to indicate the end of
+ * the LZMA1 stream. Any other value indicates the expected
+ * uncompressed size of the LZMA1 stream. (If LZMA1 was used together
+ * with filters that change the size of the data then the uncompressed
+ * size of the LZMA1 stream could be different than the final
+ * uncompressed size of the filtered stream.)
+ *
+ * ext_size_low holds the least significant 32 bits of the
+ * uncompressed size. The most significant 32 bits must be set
+ * in ext_size_high. The macro lzma_ext_size_set(opt_lzma, u64size)
+ * can be used to set these members.
+ *
+ * The 64-bit uncompressed size is split into two uint32_t variables
+ * because there were no reserved uint64_t members and using the
+ * same options structure for LZMA_FILTER_LZMA1, LZMA_FILTER_LZMA1EXT,
+ * and LZMA_FILTER_LZMA2 was otherwise more convenient than having
+ * a new options structure for LZMA_FILTER_LZMA1EXT. (Replacing two
+ * uint32_t members with one uint64_t changes the ABI on some systems
+ * as the alignment of this struct can increase from 4 bytes to 8.)
+ */
+ uint32_t ext_size_low;
+
+ /**
+ * \brief For LZMA_FILTER_LZMA1EXT: Uncompressed size (high bits)
+ *
+ * This holds the most significant 32 bits of the uncompressed size.
+ */
+ uint32_t ext_size_high;
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. You should not touch these, because the names
+ * of these variables may change. These are and will never be used
+ * with the currently supported options, so it is safe to leave these
+ * uninitialized.
+ */
+
+ /** \private Reserved member. */
+ uint32_t reserved_int4;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int5;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int6;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int7;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int8;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum1;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum2;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum3;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum4;
+
+ /** \private Reserved member. */
+ void *reserved_ptr1;
+
+ /** \private Reserved member. */
+ void *reserved_ptr2;
+
+} lzma_options_lzma;
+
+
+/**
+ * \brief Macro to set the 64-bit uncompressed size in ext_size_*
+ *
+ * This might be convenient when decoding using LZMA_FILTER_LZMA1EXT.
+ * This isn't used with LZMA_FILTER_LZMA1 or LZMA_FILTER_LZMA2.
+ */
+#define lzma_set_ext_size(opt_lzma2, u64size) \
+do { \
+ (opt_lzma2).ext_size_low = (uint32_t)(u64size); \
+ (opt_lzma2).ext_size_high = (uint32_t)((uint64_t)(u64size) >> 32); \
+} while (0)
+
+
+/**
+ * \brief Set a compression preset to lzma_options_lzma structure
+ *
+ * 0 is the fastest and 9 is the slowest. These match the switches -0 .. -9
+ * of the xz command line tool. In addition, it is possible to bitwise-or
+ * flags to the preset. Currently only LZMA_PRESET_EXTREME is supported.
+ * The flags are defined in container.h, because the flags are used also
+ * with lzma_easy_encoder().
+ *
+ * The preset levels are subject to changes between liblzma versions.
+ *
+ * This function is available only if LZMA1 or LZMA2 encoder has been enabled
+ * when building liblzma.
+ *
+ * If features (like certain match finders) have been disabled at build time,
+ * then the function may return success (false) even though the resulting
+ * LZMA1/LZMA2 options may not be usable for encoder initialization
+ * (LZMA_OPTIONS_ERROR).
+ *
+ * \param[out] options Pointer to LZMA1 or LZMA2 options to be filled
+ * \param preset Preset level bitwse-ORed with preset flags
+ *
+ * \return lzma_bool:
+ * - true if the preset is not supported (failure).
+ * - false otherwise (success).
+ */
+extern LZMA_API(lzma_bool) lzma_lzma_preset(
+ lzma_options_lzma *options, uint32_t preset) lzma_nothrow;
diff --git a/src/liblzma/api/lzma/stream_flags.h b/src/liblzma/api/lzma/stream_flags.h
new file mode 100644
index 0000000..7622a62
--- /dev/null
+++ b/src/liblzma/api/lzma/stream_flags.h
@@ -0,0 +1,266 @@
+/**
+ * \file lzma/stream_flags.h
+ * \brief .xz Stream Header and Stream Footer encoder and decoder
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Size of Stream Header and Stream Footer
+ *
+ * Stream Header and Stream Footer have the same size and they are not
+ * going to change even if a newer version of the .xz file format is
+ * developed in future.
+ */
+#define LZMA_STREAM_HEADER_SIZE 12
+
+
+/**
+ * \brief Options for encoding/decoding Stream Header and Stream Footer
+ */
+typedef struct {
+ /**
+ * \brief Stream Flags format version
+ *
+ * To prevent API and ABI breakages if new features are needed in
+ * Stream Header or Stream Footer, a version number is used to
+ * indicate which members in this structure are in use. For now,
+ * version must always be zero. With non-zero version, the
+ * lzma_stream_header_encode() and lzma_stream_footer_encode()
+ * will return LZMA_OPTIONS_ERROR.
+ *
+ * lzma_stream_header_decode() and lzma_stream_footer_decode()
+ * will always set this to the lowest value that supports all the
+ * features indicated by the Stream Flags field. The application
+ * must check that the version number set by the decoding functions
+ * is supported by the application. Otherwise it is possible that
+ * the application will decode the Stream incorrectly.
+ */
+ uint32_t version;
+
+ /**
+ * \brief Backward Size
+ *
+ * Backward Size must be a multiple of four bytes. In this Stream
+ * format version, Backward Size is the size of the Index field.
+ *
+ * Backward Size isn't actually part of the Stream Flags field, but
+ * it is convenient to include in this structure anyway. Backward
+ * Size is present only in the Stream Footer. There is no need to
+ * initialize backward_size when encoding Stream Header.
+ *
+ * lzma_stream_header_decode() always sets backward_size to
+ * LZMA_VLI_UNKNOWN so that it is convenient to use
+ * lzma_stream_flags_compare() when both Stream Header and Stream
+ * Footer have been decoded.
+ */
+ lzma_vli backward_size;
+
+ /**
+ * \brief Minimum value for lzma_stream_flags.backward_size
+ */
+# define LZMA_BACKWARD_SIZE_MIN 4
+
+ /**
+ * \brief Maximum value for lzma_stream_flags.backward_size
+ */
+# define LZMA_BACKWARD_SIZE_MAX (LZMA_VLI_C(1) << 34)
+
+ /**
+ * \brief Check ID
+ *
+ * This indicates the type of the integrity check calculated from
+ * uncompressed data.
+ */
+ lzma_check check;
+
+ /*
+ * Reserved space to allow possible future extensions without
+ * breaking the ABI. You should not touch these, because the
+ * names of these variables may change.
+ *
+ * (We will never be able to use all of these since Stream Flags
+ * is just two bytes plus Backward Size of four bytes. But it's
+ * nice to have the proper types when they are needed.)
+ */
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum1;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum2;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum3;
+
+ /** \private Reserved member. */
+ lzma_reserved_enum reserved_enum4;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool1;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool2;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool3;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool4;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool5;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool6;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool7;
+
+ /** \private Reserved member. */
+ lzma_bool reserved_bool8;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int1;
+
+ /** \private Reserved member. */
+ uint32_t reserved_int2;
+
+} lzma_stream_flags;
+
+
+/**
+ * \brief Encode Stream Header
+ *
+ * \param options Stream Header options to be encoded.
+ * options->backward_size is ignored and doesn't
+ * need to be initialized.
+ * \param[out] out Beginning of the output buffer of
+ * LZMA_STREAM_HEADER_SIZE bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_OPTIONS_ERROR: options->version is not supported by
+ * this liblzma version.
+ * - LZMA_PROG_ERROR: Invalid options.
+ */
+extern LZMA_API(lzma_ret) lzma_stream_header_encode(
+ const lzma_stream_flags *options, uint8_t *out)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Encode Stream Footer
+ *
+ * \param options Stream Footer options to be encoded.
+ * \param[out] out Beginning of the output buffer of
+ * LZMA_STREAM_HEADER_SIZE bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Encoding was successful.
+ * - LZMA_OPTIONS_ERROR: options->version is not supported by
+ * this liblzma version.
+ * - LZMA_PROG_ERROR: Invalid options.
+ */
+extern LZMA_API(lzma_ret) lzma_stream_footer_encode(
+ const lzma_stream_flags *options, uint8_t *out)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode Stream Header
+ *
+ * options->backward_size is always set to LZMA_VLI_UNKNOWN. This is to
+ * help comparing Stream Flags from Stream Header and Stream Footer with
+ * lzma_stream_flags_compare().
+ *
+ * \note When decoding .xz files that contain multiple Streams, it may
+ * make sense to print "file format not recognized" only if
+ * decoding of the Stream Header of the \a first Stream gives
+ * LZMA_FORMAT_ERROR. If non-first Stream Header gives
+ * LZMA_FORMAT_ERROR, the message used for LZMA_DATA_ERROR is
+ * probably more appropriate.
+ * For example, the Stream decoder in liblzma uses
+ * LZMA_DATA_ERROR if LZMA_FORMAT_ERROR is returned by
+ * lzma_stream_header_decode() when decoding non-first Stream.
+ *
+ * \param[out] options Target for the decoded Stream Header options.
+ * \param in Beginning of the input buffer of
+ * LZMA_STREAM_HEADER_SIZE bytes.
+ *
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_FORMAT_ERROR: Magic bytes don't match, thus the given
+ * buffer cannot be Stream Header.
+ * - LZMA_DATA_ERROR: CRC32 doesn't match, thus the header
+ * is corrupt.
+ * - LZMA_OPTIONS_ERROR: Unsupported options are present
+ * in the header.
+ */
+extern LZMA_API(lzma_ret) lzma_stream_header_decode(
+ lzma_stream_flags *options, const uint8_t *in)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Decode Stream Footer
+ *
+ * \note If Stream Header was already decoded successfully, but
+ * decoding Stream Footer returns LZMA_FORMAT_ERROR, the
+ * application should probably report some other error message
+ * than "file format not recognized". The file likely
+ * is corrupt (possibly truncated). The Stream decoder in liblzma
+ * uses LZMA_DATA_ERROR in this situation.
+ *
+ * \param[out] options Target for the decoded Stream Footer options.
+ * \param in Beginning of the input buffer of
+ * LZMA_STREAM_HEADER_SIZE bytes.
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Decoding was successful.
+ * - LZMA_FORMAT_ERROR: Magic bytes don't match, thus the given
+ * buffer cannot be Stream Footer.
+ * - LZMA_DATA_ERROR: CRC32 doesn't match, thus the Stream Footer
+ * is corrupt.
+ * - LZMA_OPTIONS_ERROR: Unsupported options are present
+ * in Stream Footer.
+ */
+extern LZMA_API(lzma_ret) lzma_stream_footer_decode(
+ lzma_stream_flags *options, const uint8_t *in)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+
+/**
+ * \brief Compare two lzma_stream_flags structures
+ *
+ * backward_size values are compared only if both are not
+ * LZMA_VLI_UNKNOWN.
+ *
+ * \param a Pointer to lzma_stream_flags structure
+ * \param b Pointer to lzma_stream_flags structure
+ *
+ * \return Possible lzma_ret values:
+ * - LZMA_OK: Both are equal. If either had backward_size set
+ * to LZMA_VLI_UNKNOWN, backward_size values were not
+ * compared or validated.
+ * - LZMA_DATA_ERROR: The structures differ.
+ * - LZMA_OPTIONS_ERROR: version in either structure is greater
+ * than the maximum supported version (currently zero).
+ * - LZMA_PROG_ERROR: Invalid value, e.g. invalid check or
+ * backward_size.
+ */
+extern LZMA_API(lzma_ret) lzma_stream_flags_compare(
+ const lzma_stream_flags *a, const lzma_stream_flags *b)
+ lzma_nothrow lzma_attr_pure;
diff --git a/src/liblzma/api/lzma/version.h b/src/liblzma/api/lzma/version.h
new file mode 100644
index 0000000..8dac382
--- /dev/null
+++ b/src/liblzma/api/lzma/version.h
@@ -0,0 +1,135 @@
+/**
+ * \file lzma/version.h
+ * \brief Version number
+ * \note Never include this file directly. Use <lzma.h> instead.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/** \brief Major version number of the liblzma release. */
+#define LZMA_VERSION_MAJOR 5
+
+/** \brief Minor version number of the liblzma release. */
+#define LZMA_VERSION_MINOR 4
+
+/** \brief Patch version number of the liblzma release. */
+#define LZMA_VERSION_PATCH 5
+
+/**
+ * \brief Version stability marker
+ *
+ * This will always be one of three values:
+ * - LZMA_VERSION_STABILITY_ALPHA
+ * - LZMA_VERSION_STABILITY_BETA
+ * - LZMA_VERSION_STABILITY_STABLE
+ */
+#define LZMA_VERSION_STABILITY LZMA_VERSION_STABILITY_STABLE
+
+/** \brief Commit version number of the liblzma release */
+#ifndef LZMA_VERSION_COMMIT
+# define LZMA_VERSION_COMMIT ""
+#endif
+
+
+/*
+ * Map symbolic stability levels to integers.
+ */
+#define LZMA_VERSION_STABILITY_ALPHA 0
+#define LZMA_VERSION_STABILITY_BETA 1
+#define LZMA_VERSION_STABILITY_STABLE 2
+
+
+/**
+ * \brief Compile-time version number
+ *
+ * The version number is of format xyyyzzzs where
+ * - x = major
+ * - yyy = minor
+ * - zzz = revision
+ * - s indicates stability: 0 = alpha, 1 = beta, 2 = stable
+ *
+ * The same xyyyzzz triplet is never reused with different stability levels.
+ * For example, if 5.1.0alpha has been released, there will never be 5.1.0beta
+ * or 5.1.0 stable.
+ *
+ * \note The version number of liblzma has nothing to with
+ * the version number of Igor Pavlov's LZMA SDK.
+ */
+#define LZMA_VERSION (LZMA_VERSION_MAJOR * UINT32_C(10000000) \
+ + LZMA_VERSION_MINOR * UINT32_C(10000) \
+ + LZMA_VERSION_PATCH * UINT32_C(10) \
+ + LZMA_VERSION_STABILITY)
+
+
+/*
+ * Macros to construct the compile-time version string
+ */
+#if LZMA_VERSION_STABILITY == LZMA_VERSION_STABILITY_ALPHA
+# define LZMA_VERSION_STABILITY_STRING "alpha"
+#elif LZMA_VERSION_STABILITY == LZMA_VERSION_STABILITY_BETA
+# define LZMA_VERSION_STABILITY_STRING "beta"
+#elif LZMA_VERSION_STABILITY == LZMA_VERSION_STABILITY_STABLE
+# define LZMA_VERSION_STABILITY_STRING ""
+#else
+# error Incorrect LZMA_VERSION_STABILITY
+#endif
+
+#define LZMA_VERSION_STRING_C_(major, minor, patch, stability, commit) \
+ #major "." #minor "." #patch stability commit
+
+#define LZMA_VERSION_STRING_C(major, minor, patch, stability, commit) \
+ LZMA_VERSION_STRING_C_(major, minor, patch, stability, commit)
+
+
+/**
+ * \brief Compile-time version as a string
+ *
+ * This can be for example "4.999.5alpha", "4.999.8beta", or "5.0.0" (stable
+ * versions don't have any "stable" suffix). In future, a snapshot built
+ * from source code repository may include an additional suffix, for example
+ * "4.999.8beta-21-g1d92". The commit ID won't be available in numeric form
+ * in LZMA_VERSION macro.
+ */
+#define LZMA_VERSION_STRING LZMA_VERSION_STRING_C( \
+ LZMA_VERSION_MAJOR, LZMA_VERSION_MINOR, \
+ LZMA_VERSION_PATCH, LZMA_VERSION_STABILITY_STRING, \
+ LZMA_VERSION_COMMIT)
+
+
+/* #ifndef is needed for use with windres (MinGW-w64 or Cygwin). */
+#ifndef LZMA_H_INTERNAL_RC
+
+/**
+ * \brief Run-time version number as an integer
+ *
+ * This allows an application to compare if it was built against the same,
+ * older, or newer version of liblzma that is currently running.
+ *
+ * \return The value of LZMA_VERSION macro at the compile time of liblzma
+ */
+extern LZMA_API(uint32_t) lzma_version_number(void)
+ lzma_nothrow lzma_attr_const;
+
+
+/**
+ * \brief Run-time version as a string
+ *
+ * This function may be useful to display which version of liblzma an
+ * application is currently using.
+ *
+ * \return Run-time version of liblzma
+ */
+extern LZMA_API(const char *) lzma_version_string(void)
+ lzma_nothrow lzma_attr_const;
+
+#endif
diff --git a/src/liblzma/api/lzma/vli.h b/src/liblzma/api/lzma/vli.h
new file mode 100644
index 0000000..f9ad155
--- /dev/null
+++ b/src/liblzma/api/lzma/vli.h
@@ -0,0 +1,168 @@
+/**
+ * \file lzma/vli.h
+ * \brief Variable-length integer handling
+ * \note Never include this file directly. Use <lzma.h> instead.
+ *
+ * In the .xz format, most integers are encoded in a variable-length
+ * representation, which is sometimes called little endian base-128 encoding.
+ * This saves space when smaller values are more likely than bigger values.
+ *
+ * The encoding scheme encodes seven bits to every byte, using minimum
+ * number of bytes required to represent the given value. Encodings that use
+ * non-minimum number of bytes are invalid, thus every integer has exactly
+ * one encoded representation. The maximum number of bits in a VLI is 63,
+ * thus the vli argument must be less than or equal to UINT64_MAX / 2. You
+ * should use LZMA_VLI_MAX for clarity.
+ */
+
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#ifndef LZMA_H_INTERNAL
+# error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief Maximum supported value of a variable-length integer
+ */
+#define LZMA_VLI_MAX (UINT64_MAX / 2)
+
+/**
+ * \brief VLI value to denote that the value is unknown
+ */
+#define LZMA_VLI_UNKNOWN UINT64_MAX
+
+/**
+ * \brief Maximum supported encoded length of variable length integers
+ */
+#define LZMA_VLI_BYTES_MAX 9
+
+/**
+ * \brief VLI constant suffix
+ */
+#define LZMA_VLI_C(n) UINT64_C(n)
+
+
+/**
+ * \brief Variable-length integer type
+ *
+ * Valid VLI values are in the range [0, LZMA_VLI_MAX]. Unknown value is
+ * indicated with LZMA_VLI_UNKNOWN, which is the maximum value of the
+ * underlying integer type.
+ *
+ * lzma_vli will be uint64_t for the foreseeable future. If a bigger size
+ * is needed in the future, it is guaranteed that 2 * LZMA_VLI_MAX will
+ * not overflow lzma_vli. This simplifies integer overflow detection.
+ */
+typedef uint64_t lzma_vli;
+
+
+/**
+ * \brief Validate a variable-length integer
+ *
+ * This is useful to test that application has given acceptable values
+ * for example in the uncompressed_size and compressed_size variables.
+ *
+ * \return True if the integer is representable as VLI or if it
+ * indicates unknown value. False if the integer cannot be
+ * represented as VLI.
+ */
+#define lzma_vli_is_valid(vli) \
+ ((vli) <= LZMA_VLI_MAX || (vli) == LZMA_VLI_UNKNOWN)
+
+
+/**
+ * \brief Encode a variable-length integer
+ *
+ * This function has two modes: single-call and multi-call. Single-call mode
+ * encodes the whole integer at once; it is an error if the output buffer is
+ * too small. Multi-call mode saves the position in *vli_pos, and thus it is
+ * possible to continue encoding if the buffer becomes full before the whole
+ * integer has been encoded.
+ *
+ * \param vli Integer to be encoded
+ * \param[out] vli_pos How many VLI-encoded bytes have already been written
+ * out. When starting to encode a new integer in
+ * multi-call mode, *vli_pos must be set to zero.
+ * To use single-call encoding, set vli_pos to NULL.
+ * \param[out] out Beginning of the output buffer
+ * \param[out] out_pos The next byte will be written to out[*out_pos].
+ * \param out_size Size of the out buffer; the first byte into
+ * which no data is written to is out[out_size].
+ *
+ * \return Slightly different return values are used in multi-call and
+ * single-call modes.
+ *
+ * Single-call (vli_pos == NULL):
+ * - LZMA_OK: Integer successfully encoded.
+ * - LZMA_PROG_ERROR: Arguments are not sane. This can be due
+ * to too little output space; single-call mode doesn't use
+ * LZMA_BUF_ERROR, since the application should have checked
+ * the encoded size with lzma_vli_size().
+ *
+ * Multi-call (vli_pos != NULL):
+ * - LZMA_OK: So far all OK, but the integer is not
+ * completely written out yet.
+ * - LZMA_STREAM_END: Integer successfully encoded.
+ * - LZMA_BUF_ERROR: No output space was provided.
+ * - LZMA_PROG_ERROR: Arguments are not sane.
+ */
+extern LZMA_API(lzma_ret) lzma_vli_encode(lzma_vli vli, size_t *vli_pos,
+ uint8_t *out, size_t *out_pos, size_t out_size) lzma_nothrow;
+
+
+/**
+ * \brief Decode a variable-length integer
+ *
+ * Like lzma_vli_encode(), this function has single-call and multi-call modes.
+ *
+ * \param[out] vli Pointer to decoded integer. The decoder will
+ * initialize it to zero when *vli_pos == 0, so
+ * application isn't required to initialize *vli.
+ * \param[out] vli_pos How many bytes have already been decoded. When
+ * starting to decode a new integer in multi-call
+ * mode, *vli_pos must be initialized to zero. To
+ * use single-call decoding, set vli_pos to NULL.
+ * \param in Beginning of the input buffer
+ * \param[out] in_pos The next byte will be read from in[*in_pos].
+ * \param in_size Size of the input buffer; the first byte that
+ * won't be read is in[in_size].
+ *
+ * \return Slightly different return values are used in multi-call and
+ * single-call modes.
+ *
+ * Single-call (vli_pos == NULL):
+ * - LZMA_OK: Integer successfully decoded.
+ * - LZMA_DATA_ERROR: Integer is corrupt. This includes hitting
+ * the end of the input buffer before the whole integer was
+ * decoded; providing no input at all will use LZMA_DATA_ERROR.
+ * - LZMA_PROG_ERROR: Arguments are not sane.
+ *
+ * Multi-call (vli_pos != NULL):
+ * - LZMA_OK: So far all OK, but the integer is not
+ * completely decoded yet.
+ * - LZMA_STREAM_END: Integer successfully decoded.
+ * - LZMA_DATA_ERROR: Integer is corrupt.
+ * - LZMA_BUF_ERROR: No input was provided.
+ * - LZMA_PROG_ERROR: Arguments are not sane.
+ */
+extern LZMA_API(lzma_ret) lzma_vli_decode(lzma_vli *vli, size_t *vli_pos,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+ lzma_nothrow;
+
+
+/**
+ * \brief Get the number of bytes required to encode a VLI
+ *
+ * \param vli Integer whose encoded size is to be determined
+ *
+ * \return Number of bytes on success (1-9). If vli isn't valid,
+ * zero is returned.
+ */
+extern LZMA_API(uint32_t) lzma_vli_size(lzma_vli vli)
+ lzma_nothrow lzma_attr_pure;
diff --git a/src/liblzma/check/Makefile.inc b/src/liblzma/check/Makefile.inc
new file mode 100644
index 0000000..dc011a3
--- /dev/null
+++ b/src/liblzma/check/Makefile.inc
@@ -0,0 +1,53 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+EXTRA_DIST += \
+ check/crc32_tablegen.c \
+ check/crc64_tablegen.c
+
+liblzma_la_SOURCES += \
+ check/check.c \
+ check/check.h \
+ check/crc_macros.h
+
+if COND_CHECK_CRC32
+if COND_SMALL
+liblzma_la_SOURCES += check/crc32_small.c
+else
+liblzma_la_SOURCES += \
+ check/crc32_table.c \
+ check/crc32_table_le.h \
+ check/crc32_table_be.h
+if COND_ASM_X86
+liblzma_la_SOURCES += check/crc32_x86.S
+else
+liblzma_la_SOURCES += check/crc32_fast.c
+endif
+endif
+endif
+
+if COND_CHECK_CRC64
+if COND_SMALL
+liblzma_la_SOURCES += check/crc64_small.c
+else
+liblzma_la_SOURCES += \
+ check/crc64_table.c \
+ check/crc64_table_le.h \
+ check/crc64_table_be.h
+if COND_ASM_X86
+liblzma_la_SOURCES += check/crc64_x86.S
+else
+liblzma_la_SOURCES += check/crc64_fast.c
+endif
+endif
+endif
+
+if COND_CHECK_SHA256
+if COND_INTERNAL_SHA256
+liblzma_la_SOURCES += check/sha256.c
+endif
+endif
diff --git a/src/liblzma/check/check.c b/src/liblzma/check/check.c
new file mode 100644
index 0000000..428ddae
--- /dev/null
+++ b/src/liblzma/check/check.c
@@ -0,0 +1,174 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file check.c
+/// \brief Single API to access different integrity checks
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+
+extern LZMA_API(lzma_bool)
+lzma_check_is_supported(lzma_check type)
+{
+ if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
+ return false;
+
+ static const lzma_bool available_checks[LZMA_CHECK_ID_MAX + 1] = {
+ true, // LZMA_CHECK_NONE
+
+#ifdef HAVE_CHECK_CRC32
+ true,
+#else
+ false,
+#endif
+
+ false, // Reserved
+ false, // Reserved
+
+#ifdef HAVE_CHECK_CRC64
+ true,
+#else
+ false,
+#endif
+
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+
+#ifdef HAVE_CHECK_SHA256
+ true,
+#else
+ false,
+#endif
+
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+ false, // Reserved
+ };
+
+ return available_checks[(unsigned int)(type)];
+}
+
+
+extern LZMA_API(uint32_t)
+lzma_check_size(lzma_check type)
+{
+ if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
+ return UINT32_MAX;
+
+ // See file-format.txt section 2.1.1.2.
+ static const uint8_t check_sizes[LZMA_CHECK_ID_MAX + 1] = {
+ 0,
+ 4, 4, 4,
+ 8, 8, 8,
+ 16, 16, 16,
+ 32, 32, 32,
+ 64, 64, 64
+ };
+
+ return check_sizes[(unsigned int)(type)];
+}
+
+
+extern void
+lzma_check_init(lzma_check_state *check, lzma_check type)
+{
+ switch (type) {
+ case LZMA_CHECK_NONE:
+ break;
+
+#ifdef HAVE_CHECK_CRC32
+ case LZMA_CHECK_CRC32:
+ check->state.crc32 = 0;
+ break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+ case LZMA_CHECK_CRC64:
+ check->state.crc64 = 0;
+ break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+ case LZMA_CHECK_SHA256:
+ lzma_sha256_init(check);
+ break;
+#endif
+
+ default:
+ break;
+ }
+
+ return;
+}
+
+
+extern void
+lzma_check_update(lzma_check_state *check, lzma_check type,
+ const uint8_t *buf, size_t size)
+{
+ switch (type) {
+#ifdef HAVE_CHECK_CRC32
+ case LZMA_CHECK_CRC32:
+ check->state.crc32 = lzma_crc32(buf, size, check->state.crc32);
+ break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+ case LZMA_CHECK_CRC64:
+ check->state.crc64 = lzma_crc64(buf, size, check->state.crc64);
+ break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+ case LZMA_CHECK_SHA256:
+ lzma_sha256_update(buf, size, check);
+ break;
+#endif
+
+ default:
+ break;
+ }
+
+ return;
+}
+
+
+extern void
+lzma_check_finish(lzma_check_state *check, lzma_check type)
+{
+ switch (type) {
+#ifdef HAVE_CHECK_CRC32
+ case LZMA_CHECK_CRC32:
+ check->buffer.u32[0] = conv32le(check->state.crc32);
+ break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+ case LZMA_CHECK_CRC64:
+ check->buffer.u64[0] = conv64le(check->state.crc64);
+ break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+ case LZMA_CHECK_SHA256:
+ lzma_sha256_finish(check);
+ break;
+#endif
+
+ default:
+ break;
+ }
+
+ return;
+}
diff --git a/src/liblzma/check/check.h b/src/liblzma/check/check.h
new file mode 100644
index 0000000..8ae95d5
--- /dev/null
+++ b/src/liblzma/check/check.h
@@ -0,0 +1,175 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file check.h
+/// \brief Internal API to different integrity check functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_CHECK_H
+#define LZMA_CHECK_H
+
+#include "common.h"
+
+// If the function for external SHA-256 is missing, use the internal SHA-256
+// code. Due to how configure works, these defines can only get defined when
+// both a usable header and a type have already been found.
+#if !(defined(HAVE_CC_SHA256_INIT) \
+ || defined(HAVE_SHA256_INIT) \
+ || defined(HAVE_SHA256INIT))
+# define HAVE_INTERNAL_SHA256 1
+#endif
+
+#if defined(HAVE_INTERNAL_SHA256)
+// Nothing
+#elif defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
+# include <CommonCrypto/CommonDigest.h>
+#elif defined(HAVE_SHA256_H)
+# include <sys/types.h>
+# include <sha256.h>
+#elif defined(HAVE_SHA2_H)
+# include <sys/types.h>
+# include <sha2.h>
+#endif
+
+#if defined(HAVE_INTERNAL_SHA256)
+/// State for the internal SHA-256 implementation
+typedef struct {
+ /// Internal state
+ uint32_t state[8];
+
+ /// Size of the message excluding padding
+ uint64_t size;
+} lzma_sha256_state;
+#elif defined(HAVE_CC_SHA256_CTX)
+typedef CC_SHA256_CTX lzma_sha256_state;
+#elif defined(HAVE_SHA256_CTX)
+typedef SHA256_CTX lzma_sha256_state;
+#elif defined(HAVE_SHA2_CTX)
+typedef SHA2_CTX lzma_sha256_state;
+#endif
+
+#if defined(HAVE_INTERNAL_SHA256)
+// Nothing
+#elif defined(HAVE_CC_SHA256_INIT)
+# define LZMA_SHA256FUNC(x) CC_SHA256_ ## x
+#elif defined(HAVE_SHA256_INIT)
+# define LZMA_SHA256FUNC(x) SHA256_ ## x
+#elif defined(HAVE_SHA256INIT)
+# define LZMA_SHA256FUNC(x) SHA256 ## x
+#endif
+
+// Index hashing needs the best possible hash function (preferably
+// a cryptographic hash) for maximum reliability.
+#if defined(HAVE_CHECK_SHA256)
+# define LZMA_CHECK_BEST LZMA_CHECK_SHA256
+#elif defined(HAVE_CHECK_CRC64)
+# define LZMA_CHECK_BEST LZMA_CHECK_CRC64
+#else
+# define LZMA_CHECK_BEST LZMA_CHECK_CRC32
+#endif
+
+
+/// \brief Structure to hold internal state of the check being calculated
+///
+/// \note This is not in the public API because this structure may
+/// change in future if new integrity check algorithms are added.
+typedef struct {
+ /// Buffer to hold the final result and a temporary buffer for SHA256.
+ union {
+ uint8_t u8[64];
+ uint32_t u32[16];
+ uint64_t u64[8];
+ } buffer;
+
+ /// Check-specific data
+ union {
+ uint32_t crc32;
+ uint64_t crc64;
+ lzma_sha256_state sha256;
+ } state;
+
+} lzma_check_state;
+
+
+/// lzma_crc32_table[0] is needed by LZ encoder so we need to keep
+/// the array two-dimensional.
+#ifdef HAVE_SMALL
+lzma_attr_visibility_hidden
+extern uint32_t lzma_crc32_table[1][256];
+
+extern void lzma_crc32_init(void);
+
+#else
+
+lzma_attr_visibility_hidden
+extern const uint32_t lzma_crc32_table[8][256];
+
+lzma_attr_visibility_hidden
+extern const uint64_t lzma_crc64_table[4][256];
+#endif
+
+
+/// \brief Initialize *check depending on type
+extern void lzma_check_init(lzma_check_state *check, lzma_check type);
+
+/// Update the check state
+extern void lzma_check_update(lzma_check_state *check, lzma_check type,
+ const uint8_t *buf, size_t size);
+
+/// Finish the check calculation and store the result to check->buffer.u8.
+extern void lzma_check_finish(lzma_check_state *check, lzma_check type);
+
+
+#ifndef LZMA_SHA256FUNC
+
+/// Prepare SHA-256 state for new input.
+extern void lzma_sha256_init(lzma_check_state *check);
+
+/// Update the SHA-256 hash state
+extern void lzma_sha256_update(
+ const uint8_t *buf, size_t size, lzma_check_state *check);
+
+/// Finish the SHA-256 calculation and store the result to check->buffer.u8.
+extern void lzma_sha256_finish(lzma_check_state *check);
+
+
+#else
+
+static inline void
+lzma_sha256_init(lzma_check_state *check)
+{
+ LZMA_SHA256FUNC(Init)(&check->state.sha256);
+}
+
+
+static inline void
+lzma_sha256_update(const uint8_t *buf, size_t size, lzma_check_state *check)
+{
+#if defined(HAVE_CC_SHA256_INIT) && SIZE_MAX > UINT32_MAX
+ // Darwin's CC_SHA256_Update takes uint32_t as the buffer size,
+ // so use a loop to support size_t.
+ while (size > UINT32_MAX) {
+ LZMA_SHA256FUNC(Update)(&check->state.sha256, buf, UINT32_MAX);
+ buf += UINT32_MAX;
+ size -= UINT32_MAX;
+ }
+#endif
+
+ LZMA_SHA256FUNC(Update)(&check->state.sha256, buf, size);
+}
+
+
+static inline void
+lzma_sha256_finish(lzma_check_state *check)
+{
+ LZMA_SHA256FUNC(Final)(check->buffer.u8, &check->state.sha256);
+}
+
+#endif
+
+#endif
diff --git a/src/liblzma/check/crc32_fast.c b/src/liblzma/check/crc32_fast.c
new file mode 100644
index 0000000..eed7350
--- /dev/null
+++ b/src/liblzma/check/crc32_fast.c
@@ -0,0 +1,82 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc32.c
+/// \brief CRC32 calculation
+///
+/// Calculate the CRC32 using the slice-by-eight algorithm.
+/// It is explained in this document:
+/// http://www.intel.com/technology/comms/perfnet/download/CRC_generators.pdf
+/// The code in this file is not the same as in Intel's paper, but
+/// the basic principle is identical.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+#include "crc_macros.h"
+
+
+// If you make any changes, do some benchmarking! Seemingly unrelated
+// changes can very easily ruin the performance (and very probably is
+// very compiler dependent).
+extern LZMA_API(uint32_t)
+lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc)
+{
+ crc = ~crc;
+
+#ifdef WORDS_BIGENDIAN
+ crc = bswap32(crc);
+#endif
+
+ if (size > 8) {
+ // Fix the alignment, if needed. The if statement above
+ // ensures that this won't read past the end of buf[].
+ while ((uintptr_t)(buf) & 7) {
+ crc = lzma_crc32_table[0][*buf++ ^ A(crc)] ^ S8(crc);
+ --size;
+ }
+
+ // Calculate the position where to stop.
+ const uint8_t *const limit = buf + (size & ~(size_t)(7));
+
+ // Calculate how many bytes must be calculated separately
+ // before returning the result.
+ size &= (size_t)(7);
+
+ // Calculate the CRC32 using the slice-by-eight algorithm.
+ while (buf < limit) {
+ crc ^= aligned_read32ne(buf);
+ buf += 4;
+
+ crc = lzma_crc32_table[7][A(crc)]
+ ^ lzma_crc32_table[6][B(crc)]
+ ^ lzma_crc32_table[5][C(crc)]
+ ^ lzma_crc32_table[4][D(crc)];
+
+ const uint32_t tmp = aligned_read32ne(buf);
+ buf += 4;
+
+ // At least with some compilers, it is critical for
+ // performance, that the crc variable is XORed
+ // between the two table-lookup pairs.
+ crc = lzma_crc32_table[3][A(tmp)]
+ ^ lzma_crc32_table[2][B(tmp)]
+ ^ crc
+ ^ lzma_crc32_table[1][C(tmp)]
+ ^ lzma_crc32_table[0][D(tmp)];
+ }
+ }
+
+ while (size-- != 0)
+ crc = lzma_crc32_table[0][*buf++ ^ A(crc)] ^ S8(crc);
+
+#ifdef WORDS_BIGENDIAN
+ crc = bswap32(crc);
+#endif
+
+ return ~crc;
+}
diff --git a/src/liblzma/check/crc32_small.c b/src/liblzma/check/crc32_small.c
new file mode 100644
index 0000000..186966e
--- /dev/null
+++ b/src/liblzma/check/crc32_small.c
@@ -0,0 +1,68 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc32_small.c
+/// \brief CRC32 calculation (size-optimized)
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+
+uint32_t lzma_crc32_table[1][256];
+
+
+#ifdef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+__attribute__((__constructor__))
+#endif
+static void
+crc32_init(void)
+{
+ static const uint32_t poly32 = UINT32_C(0xEDB88320);
+
+ for (size_t b = 0; b < 256; ++b) {
+ uint32_t r = b;
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly32;
+ else
+ r >>= 1;
+ }
+
+ lzma_crc32_table[0][b] = r;
+ }
+
+ return;
+}
+
+
+#ifndef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+extern void
+lzma_crc32_init(void)
+{
+ mythread_once(crc32_init);
+ return;
+}
+#endif
+
+
+extern LZMA_API(uint32_t)
+lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc)
+{
+#ifndef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+ lzma_crc32_init();
+#endif
+
+ crc = ~crc;
+
+ while (size != 0) {
+ crc = lzma_crc32_table[0][*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
+ --size;
+ }
+
+ return ~crc;
+}
diff --git a/src/liblzma/check/crc32_table.c b/src/liblzma/check/crc32_table.c
new file mode 100644
index 0000000..b11762a
--- /dev/null
+++ b/src/liblzma/check/crc32_table.c
@@ -0,0 +1,22 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc32_table.c
+/// \brief Precalculated CRC32 table with correct endianness
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+// Having the declaration here silences clang -Wmissing-variable-declarations.
+extern const uint32_t lzma_crc32_table[8][256];
+
+#ifdef WORDS_BIGENDIAN
+# include "crc32_table_be.h"
+#else
+# include "crc32_table_le.h"
+#endif
diff --git a/src/liblzma/check/crc32_table_be.h b/src/liblzma/check/crc32_table_be.h
new file mode 100644
index 0000000..c483cb6
--- /dev/null
+++ b/src/liblzma/check/crc32_table_be.h
@@ -0,0 +1,525 @@
+/* This file has been automatically generated by crc32_tablegen.c. */
+
+const uint32_t lzma_crc32_table[8][256] = {
+ {
+ 0x00000000, 0x96300777, 0x2C610EEE, 0xBA510999,
+ 0x19C46D07, 0x8FF46A70, 0x35A563E9, 0xA395649E,
+ 0x3288DB0E, 0xA4B8DC79, 0x1EE9D5E0, 0x88D9D297,
+ 0x2B4CB609, 0xBD7CB17E, 0x072DB8E7, 0x911DBF90,
+ 0x6410B71D, 0xF220B06A, 0x4871B9F3, 0xDE41BE84,
+ 0x7DD4DA1A, 0xEBE4DD6D, 0x51B5D4F4, 0xC785D383,
+ 0x56986C13, 0xC0A86B64, 0x7AF962FD, 0xECC9658A,
+ 0x4F5C0114, 0xD96C0663, 0x633D0FFA, 0xF50D088D,
+ 0xC8206E3B, 0x5E10694C, 0xE44160D5, 0x727167A2,
+ 0xD1E4033C, 0x47D4044B, 0xFD850DD2, 0x6BB50AA5,
+ 0xFAA8B535, 0x6C98B242, 0xD6C9BBDB, 0x40F9BCAC,
+ 0xE36CD832, 0x755CDF45, 0xCF0DD6DC, 0x593DD1AB,
+ 0xAC30D926, 0x3A00DE51, 0x8051D7C8, 0x1661D0BF,
+ 0xB5F4B421, 0x23C4B356, 0x9995BACF, 0x0FA5BDB8,
+ 0x9EB80228, 0x0888055F, 0xB2D90CC6, 0x24E90BB1,
+ 0x877C6F2F, 0x114C6858, 0xAB1D61C1, 0x3D2D66B6,
+ 0x9041DC76, 0x0671DB01, 0xBC20D298, 0x2A10D5EF,
+ 0x8985B171, 0x1FB5B606, 0xA5E4BF9F, 0x33D4B8E8,
+ 0xA2C90778, 0x34F9000F, 0x8EA80996, 0x18980EE1,
+ 0xBB0D6A7F, 0x2D3D6D08, 0x976C6491, 0x015C63E6,
+ 0xF4516B6B, 0x62616C1C, 0xD8306585, 0x4E0062F2,
+ 0xED95066C, 0x7BA5011B, 0xC1F40882, 0x57C40FF5,
+ 0xC6D9B065, 0x50E9B712, 0xEAB8BE8B, 0x7C88B9FC,
+ 0xDF1DDD62, 0x492DDA15, 0xF37CD38C, 0x654CD4FB,
+ 0x5861B24D, 0xCE51B53A, 0x7400BCA3, 0xE230BBD4,
+ 0x41A5DF4A, 0xD795D83D, 0x6DC4D1A4, 0xFBF4D6D3,
+ 0x6AE96943, 0xFCD96E34, 0x468867AD, 0xD0B860DA,
+ 0x732D0444, 0xE51D0333, 0x5F4C0AAA, 0xC97C0DDD,
+ 0x3C710550, 0xAA410227, 0x10100BBE, 0x86200CC9,
+ 0x25B56857, 0xB3856F20, 0x09D466B9, 0x9FE461CE,
+ 0x0EF9DE5E, 0x98C9D929, 0x2298D0B0, 0xB4A8D7C7,
+ 0x173DB359, 0x810DB42E, 0x3B5CBDB7, 0xAD6CBAC0,
+ 0x2083B8ED, 0xB6B3BF9A, 0x0CE2B603, 0x9AD2B174,
+ 0x3947D5EA, 0xAF77D29D, 0x1526DB04, 0x8316DC73,
+ 0x120B63E3, 0x843B6494, 0x3E6A6D0D, 0xA85A6A7A,
+ 0x0BCF0EE4, 0x9DFF0993, 0x27AE000A, 0xB19E077D,
+ 0x44930FF0, 0xD2A30887, 0x68F2011E, 0xFEC20669,
+ 0x5D5762F7, 0xCB676580, 0x71366C19, 0xE7066B6E,
+ 0x761BD4FE, 0xE02BD389, 0x5A7ADA10, 0xCC4ADD67,
+ 0x6FDFB9F9, 0xF9EFBE8E, 0x43BEB717, 0xD58EB060,
+ 0xE8A3D6D6, 0x7E93D1A1, 0xC4C2D838, 0x52F2DF4F,
+ 0xF167BBD1, 0x6757BCA6, 0xDD06B53F, 0x4B36B248,
+ 0xDA2B0DD8, 0x4C1B0AAF, 0xF64A0336, 0x607A0441,
+ 0xC3EF60DF, 0x55DF67A8, 0xEF8E6E31, 0x79BE6946,
+ 0x8CB361CB, 0x1A8366BC, 0xA0D26F25, 0x36E26852,
+ 0x95770CCC, 0x03470BBB, 0xB9160222, 0x2F260555,
+ 0xBE3BBAC5, 0x280BBDB2, 0x925AB42B, 0x046AB35C,
+ 0xA7FFD7C2, 0x31CFD0B5, 0x8B9ED92C, 0x1DAEDE5B,
+ 0xB0C2649B, 0x26F263EC, 0x9CA36A75, 0x0A936D02,
+ 0xA906099C, 0x3F360EEB, 0x85670772, 0x13570005,
+ 0x824ABF95, 0x147AB8E2, 0xAE2BB17B, 0x381BB60C,
+ 0x9B8ED292, 0x0DBED5E5, 0xB7EFDC7C, 0x21DFDB0B,
+ 0xD4D2D386, 0x42E2D4F1, 0xF8B3DD68, 0x6E83DA1F,
+ 0xCD16BE81, 0x5B26B9F6, 0xE177B06F, 0x7747B718,
+ 0xE65A0888, 0x706A0FFF, 0xCA3B0666, 0x5C0B0111,
+ 0xFF9E658F, 0x69AE62F8, 0xD3FF6B61, 0x45CF6C16,
+ 0x78E20AA0, 0xEED20DD7, 0x5483044E, 0xC2B30339,
+ 0x612667A7, 0xF71660D0, 0x4D476949, 0xDB776E3E,
+ 0x4A6AD1AE, 0xDC5AD6D9, 0x660BDF40, 0xF03BD837,
+ 0x53AEBCA9, 0xC59EBBDE, 0x7FCFB247, 0xE9FFB530,
+ 0x1CF2BDBD, 0x8AC2BACA, 0x3093B353, 0xA6A3B424,
+ 0x0536D0BA, 0x9306D7CD, 0x2957DE54, 0xBF67D923,
+ 0x2E7A66B3, 0xB84A61C4, 0x021B685D, 0x942B6F2A,
+ 0x37BE0BB4, 0xA18E0CC3, 0x1BDF055A, 0x8DEF022D
+ }, {
+ 0x00000000, 0x41311B19, 0x82623632, 0xC3532D2B,
+ 0x04C56C64, 0x45F4777D, 0x86A75A56, 0xC796414F,
+ 0x088AD9C8, 0x49BBC2D1, 0x8AE8EFFA, 0xCBD9F4E3,
+ 0x0C4FB5AC, 0x4D7EAEB5, 0x8E2D839E, 0xCF1C9887,
+ 0x5112C24A, 0x1023D953, 0xD370F478, 0x9241EF61,
+ 0x55D7AE2E, 0x14E6B537, 0xD7B5981C, 0x96848305,
+ 0x59981B82, 0x18A9009B, 0xDBFA2DB0, 0x9ACB36A9,
+ 0x5D5D77E6, 0x1C6C6CFF, 0xDF3F41D4, 0x9E0E5ACD,
+ 0xA2248495, 0xE3159F8C, 0x2046B2A7, 0x6177A9BE,
+ 0xA6E1E8F1, 0xE7D0F3E8, 0x2483DEC3, 0x65B2C5DA,
+ 0xAAAE5D5D, 0xEB9F4644, 0x28CC6B6F, 0x69FD7076,
+ 0xAE6B3139, 0xEF5A2A20, 0x2C09070B, 0x6D381C12,
+ 0xF33646DF, 0xB2075DC6, 0x715470ED, 0x30656BF4,
+ 0xF7F32ABB, 0xB6C231A2, 0x75911C89, 0x34A00790,
+ 0xFBBC9F17, 0xBA8D840E, 0x79DEA925, 0x38EFB23C,
+ 0xFF79F373, 0xBE48E86A, 0x7D1BC541, 0x3C2ADE58,
+ 0x054F79F0, 0x447E62E9, 0x872D4FC2, 0xC61C54DB,
+ 0x018A1594, 0x40BB0E8D, 0x83E823A6, 0xC2D938BF,
+ 0x0DC5A038, 0x4CF4BB21, 0x8FA7960A, 0xCE968D13,
+ 0x0900CC5C, 0x4831D745, 0x8B62FA6E, 0xCA53E177,
+ 0x545DBBBA, 0x156CA0A3, 0xD63F8D88, 0x970E9691,
+ 0x5098D7DE, 0x11A9CCC7, 0xD2FAE1EC, 0x93CBFAF5,
+ 0x5CD76272, 0x1DE6796B, 0xDEB55440, 0x9F844F59,
+ 0x58120E16, 0x1923150F, 0xDA703824, 0x9B41233D,
+ 0xA76BFD65, 0xE65AE67C, 0x2509CB57, 0x6438D04E,
+ 0xA3AE9101, 0xE29F8A18, 0x21CCA733, 0x60FDBC2A,
+ 0xAFE124AD, 0xEED03FB4, 0x2D83129F, 0x6CB20986,
+ 0xAB2448C9, 0xEA1553D0, 0x29467EFB, 0x687765E2,
+ 0xF6793F2F, 0xB7482436, 0x741B091D, 0x352A1204,
+ 0xF2BC534B, 0xB38D4852, 0x70DE6579, 0x31EF7E60,
+ 0xFEF3E6E7, 0xBFC2FDFE, 0x7C91D0D5, 0x3DA0CBCC,
+ 0xFA368A83, 0xBB07919A, 0x7854BCB1, 0x3965A7A8,
+ 0x4B98833B, 0x0AA99822, 0xC9FAB509, 0x88CBAE10,
+ 0x4F5DEF5F, 0x0E6CF446, 0xCD3FD96D, 0x8C0EC274,
+ 0x43125AF3, 0x022341EA, 0xC1706CC1, 0x804177D8,
+ 0x47D73697, 0x06E62D8E, 0xC5B500A5, 0x84841BBC,
+ 0x1A8A4171, 0x5BBB5A68, 0x98E87743, 0xD9D96C5A,
+ 0x1E4F2D15, 0x5F7E360C, 0x9C2D1B27, 0xDD1C003E,
+ 0x120098B9, 0x533183A0, 0x9062AE8B, 0xD153B592,
+ 0x16C5F4DD, 0x57F4EFC4, 0x94A7C2EF, 0xD596D9F6,
+ 0xE9BC07AE, 0xA88D1CB7, 0x6BDE319C, 0x2AEF2A85,
+ 0xED796BCA, 0xAC4870D3, 0x6F1B5DF8, 0x2E2A46E1,
+ 0xE136DE66, 0xA007C57F, 0x6354E854, 0x2265F34D,
+ 0xE5F3B202, 0xA4C2A91B, 0x67918430, 0x26A09F29,
+ 0xB8AEC5E4, 0xF99FDEFD, 0x3ACCF3D6, 0x7BFDE8CF,
+ 0xBC6BA980, 0xFD5AB299, 0x3E099FB2, 0x7F3884AB,
+ 0xB0241C2C, 0xF1150735, 0x32462A1E, 0x73773107,
+ 0xB4E17048, 0xF5D06B51, 0x3683467A, 0x77B25D63,
+ 0x4ED7FACB, 0x0FE6E1D2, 0xCCB5CCF9, 0x8D84D7E0,
+ 0x4A1296AF, 0x0B238DB6, 0xC870A09D, 0x8941BB84,
+ 0x465D2303, 0x076C381A, 0xC43F1531, 0x850E0E28,
+ 0x42984F67, 0x03A9547E, 0xC0FA7955, 0x81CB624C,
+ 0x1FC53881, 0x5EF42398, 0x9DA70EB3, 0xDC9615AA,
+ 0x1B0054E5, 0x5A314FFC, 0x996262D7, 0xD85379CE,
+ 0x174FE149, 0x567EFA50, 0x952DD77B, 0xD41CCC62,
+ 0x138A8D2D, 0x52BB9634, 0x91E8BB1F, 0xD0D9A006,
+ 0xECF37E5E, 0xADC26547, 0x6E91486C, 0x2FA05375,
+ 0xE836123A, 0xA9070923, 0x6A542408, 0x2B653F11,
+ 0xE479A796, 0xA548BC8F, 0x661B91A4, 0x272A8ABD,
+ 0xE0BCCBF2, 0xA18DD0EB, 0x62DEFDC0, 0x23EFE6D9,
+ 0xBDE1BC14, 0xFCD0A70D, 0x3F838A26, 0x7EB2913F,
+ 0xB924D070, 0xF815CB69, 0x3B46E642, 0x7A77FD5B,
+ 0xB56B65DC, 0xF45A7EC5, 0x370953EE, 0x763848F7,
+ 0xB1AE09B8, 0xF09F12A1, 0x33CC3F8A, 0x72FD2493
+ }, {
+ 0x00000000, 0x376AC201, 0x6ED48403, 0x59BE4602,
+ 0xDCA80907, 0xEBC2CB06, 0xB27C8D04, 0x85164F05,
+ 0xB851130E, 0x8F3BD10F, 0xD685970D, 0xE1EF550C,
+ 0x64F91A09, 0x5393D808, 0x0A2D9E0A, 0x3D475C0B,
+ 0x70A3261C, 0x47C9E41D, 0x1E77A21F, 0x291D601E,
+ 0xAC0B2F1B, 0x9B61ED1A, 0xC2DFAB18, 0xF5B56919,
+ 0xC8F23512, 0xFF98F713, 0xA626B111, 0x914C7310,
+ 0x145A3C15, 0x2330FE14, 0x7A8EB816, 0x4DE47A17,
+ 0xE0464D38, 0xD72C8F39, 0x8E92C93B, 0xB9F80B3A,
+ 0x3CEE443F, 0x0B84863E, 0x523AC03C, 0x6550023D,
+ 0x58175E36, 0x6F7D9C37, 0x36C3DA35, 0x01A91834,
+ 0x84BF5731, 0xB3D59530, 0xEA6BD332, 0xDD011133,
+ 0x90E56B24, 0xA78FA925, 0xFE31EF27, 0xC95B2D26,
+ 0x4C4D6223, 0x7B27A022, 0x2299E620, 0x15F32421,
+ 0x28B4782A, 0x1FDEBA2B, 0x4660FC29, 0x710A3E28,
+ 0xF41C712D, 0xC376B32C, 0x9AC8F52E, 0xADA2372F,
+ 0xC08D9A70, 0xF7E75871, 0xAE591E73, 0x9933DC72,
+ 0x1C259377, 0x2B4F5176, 0x72F11774, 0x459BD575,
+ 0x78DC897E, 0x4FB64B7F, 0x16080D7D, 0x2162CF7C,
+ 0xA4748079, 0x931E4278, 0xCAA0047A, 0xFDCAC67B,
+ 0xB02EBC6C, 0x87447E6D, 0xDEFA386F, 0xE990FA6E,
+ 0x6C86B56B, 0x5BEC776A, 0x02523168, 0x3538F369,
+ 0x087FAF62, 0x3F156D63, 0x66AB2B61, 0x51C1E960,
+ 0xD4D7A665, 0xE3BD6464, 0xBA032266, 0x8D69E067,
+ 0x20CBD748, 0x17A11549, 0x4E1F534B, 0x7975914A,
+ 0xFC63DE4F, 0xCB091C4E, 0x92B75A4C, 0xA5DD984D,
+ 0x989AC446, 0xAFF00647, 0xF64E4045, 0xC1248244,
+ 0x4432CD41, 0x73580F40, 0x2AE64942, 0x1D8C8B43,
+ 0x5068F154, 0x67023355, 0x3EBC7557, 0x09D6B756,
+ 0x8CC0F853, 0xBBAA3A52, 0xE2147C50, 0xD57EBE51,
+ 0xE839E25A, 0xDF53205B, 0x86ED6659, 0xB187A458,
+ 0x3491EB5D, 0x03FB295C, 0x5A456F5E, 0x6D2FAD5F,
+ 0x801B35E1, 0xB771F7E0, 0xEECFB1E2, 0xD9A573E3,
+ 0x5CB33CE6, 0x6BD9FEE7, 0x3267B8E5, 0x050D7AE4,
+ 0x384A26EF, 0x0F20E4EE, 0x569EA2EC, 0x61F460ED,
+ 0xE4E22FE8, 0xD388EDE9, 0x8A36ABEB, 0xBD5C69EA,
+ 0xF0B813FD, 0xC7D2D1FC, 0x9E6C97FE, 0xA90655FF,
+ 0x2C101AFA, 0x1B7AD8FB, 0x42C49EF9, 0x75AE5CF8,
+ 0x48E900F3, 0x7F83C2F2, 0x263D84F0, 0x115746F1,
+ 0x944109F4, 0xA32BCBF5, 0xFA958DF7, 0xCDFF4FF6,
+ 0x605D78D9, 0x5737BAD8, 0x0E89FCDA, 0x39E33EDB,
+ 0xBCF571DE, 0x8B9FB3DF, 0xD221F5DD, 0xE54B37DC,
+ 0xD80C6BD7, 0xEF66A9D6, 0xB6D8EFD4, 0x81B22DD5,
+ 0x04A462D0, 0x33CEA0D1, 0x6A70E6D3, 0x5D1A24D2,
+ 0x10FE5EC5, 0x27949CC4, 0x7E2ADAC6, 0x494018C7,
+ 0xCC5657C2, 0xFB3C95C3, 0xA282D3C1, 0x95E811C0,
+ 0xA8AF4DCB, 0x9FC58FCA, 0xC67BC9C8, 0xF1110BC9,
+ 0x740744CC, 0x436D86CD, 0x1AD3C0CF, 0x2DB902CE,
+ 0x4096AF91, 0x77FC6D90, 0x2E422B92, 0x1928E993,
+ 0x9C3EA696, 0xAB546497, 0xF2EA2295, 0xC580E094,
+ 0xF8C7BC9F, 0xCFAD7E9E, 0x9613389C, 0xA179FA9D,
+ 0x246FB598, 0x13057799, 0x4ABB319B, 0x7DD1F39A,
+ 0x3035898D, 0x075F4B8C, 0x5EE10D8E, 0x698BCF8F,
+ 0xEC9D808A, 0xDBF7428B, 0x82490489, 0xB523C688,
+ 0x88649A83, 0xBF0E5882, 0xE6B01E80, 0xD1DADC81,
+ 0x54CC9384, 0x63A65185, 0x3A181787, 0x0D72D586,
+ 0xA0D0E2A9, 0x97BA20A8, 0xCE0466AA, 0xF96EA4AB,
+ 0x7C78EBAE, 0x4B1229AF, 0x12AC6FAD, 0x25C6ADAC,
+ 0x1881F1A7, 0x2FEB33A6, 0x765575A4, 0x413FB7A5,
+ 0xC429F8A0, 0xF3433AA1, 0xAAFD7CA3, 0x9D97BEA2,
+ 0xD073C4B5, 0xE71906B4, 0xBEA740B6, 0x89CD82B7,
+ 0x0CDBCDB2, 0x3BB10FB3, 0x620F49B1, 0x55658BB0,
+ 0x6822D7BB, 0x5F4815BA, 0x06F653B8, 0x319C91B9,
+ 0xB48ADEBC, 0x83E01CBD, 0xDA5E5ABF, 0xED3498BE
+ }, {
+ 0x00000000, 0x6567BCB8, 0x8BC809AA, 0xEEAFB512,
+ 0x5797628F, 0x32F0DE37, 0xDC5F6B25, 0xB938D79D,
+ 0xEF28B4C5, 0x8A4F087D, 0x64E0BD6F, 0x018701D7,
+ 0xB8BFD64A, 0xDDD86AF2, 0x3377DFE0, 0x56106358,
+ 0x9F571950, 0xFA30A5E8, 0x149F10FA, 0x71F8AC42,
+ 0xC8C07BDF, 0xADA7C767, 0x43087275, 0x266FCECD,
+ 0x707FAD95, 0x1518112D, 0xFBB7A43F, 0x9ED01887,
+ 0x27E8CF1A, 0x428F73A2, 0xAC20C6B0, 0xC9477A08,
+ 0x3EAF32A0, 0x5BC88E18, 0xB5673B0A, 0xD00087B2,
+ 0x6938502F, 0x0C5FEC97, 0xE2F05985, 0x8797E53D,
+ 0xD1878665, 0xB4E03ADD, 0x5A4F8FCF, 0x3F283377,
+ 0x8610E4EA, 0xE3775852, 0x0DD8ED40, 0x68BF51F8,
+ 0xA1F82BF0, 0xC49F9748, 0x2A30225A, 0x4F579EE2,
+ 0xF66F497F, 0x9308F5C7, 0x7DA740D5, 0x18C0FC6D,
+ 0x4ED09F35, 0x2BB7238D, 0xC518969F, 0xA07F2A27,
+ 0x1947FDBA, 0x7C204102, 0x928FF410, 0xF7E848A8,
+ 0x3D58149B, 0x583FA823, 0xB6901D31, 0xD3F7A189,
+ 0x6ACF7614, 0x0FA8CAAC, 0xE1077FBE, 0x8460C306,
+ 0xD270A05E, 0xB7171CE6, 0x59B8A9F4, 0x3CDF154C,
+ 0x85E7C2D1, 0xE0807E69, 0x0E2FCB7B, 0x6B4877C3,
+ 0xA20F0DCB, 0xC768B173, 0x29C70461, 0x4CA0B8D9,
+ 0xF5986F44, 0x90FFD3FC, 0x7E5066EE, 0x1B37DA56,
+ 0x4D27B90E, 0x284005B6, 0xC6EFB0A4, 0xA3880C1C,
+ 0x1AB0DB81, 0x7FD76739, 0x9178D22B, 0xF41F6E93,
+ 0x03F7263B, 0x66909A83, 0x883F2F91, 0xED589329,
+ 0x546044B4, 0x3107F80C, 0xDFA84D1E, 0xBACFF1A6,
+ 0xECDF92FE, 0x89B82E46, 0x67179B54, 0x027027EC,
+ 0xBB48F071, 0xDE2F4CC9, 0x3080F9DB, 0x55E74563,
+ 0x9CA03F6B, 0xF9C783D3, 0x176836C1, 0x720F8A79,
+ 0xCB375DE4, 0xAE50E15C, 0x40FF544E, 0x2598E8F6,
+ 0x73888BAE, 0x16EF3716, 0xF8408204, 0x9D273EBC,
+ 0x241FE921, 0x41785599, 0xAFD7E08B, 0xCAB05C33,
+ 0x3BB659ED, 0x5ED1E555, 0xB07E5047, 0xD519ECFF,
+ 0x6C213B62, 0x094687DA, 0xE7E932C8, 0x828E8E70,
+ 0xD49EED28, 0xB1F95190, 0x5F56E482, 0x3A31583A,
+ 0x83098FA7, 0xE66E331F, 0x08C1860D, 0x6DA63AB5,
+ 0xA4E140BD, 0xC186FC05, 0x2F294917, 0x4A4EF5AF,
+ 0xF3762232, 0x96119E8A, 0x78BE2B98, 0x1DD99720,
+ 0x4BC9F478, 0x2EAE48C0, 0xC001FDD2, 0xA566416A,
+ 0x1C5E96F7, 0x79392A4F, 0x97969F5D, 0xF2F123E5,
+ 0x05196B4D, 0x607ED7F5, 0x8ED162E7, 0xEBB6DE5F,
+ 0x528E09C2, 0x37E9B57A, 0xD9460068, 0xBC21BCD0,
+ 0xEA31DF88, 0x8F566330, 0x61F9D622, 0x049E6A9A,
+ 0xBDA6BD07, 0xD8C101BF, 0x366EB4AD, 0x53090815,
+ 0x9A4E721D, 0xFF29CEA5, 0x11867BB7, 0x74E1C70F,
+ 0xCDD91092, 0xA8BEAC2A, 0x46111938, 0x2376A580,
+ 0x7566C6D8, 0x10017A60, 0xFEAECF72, 0x9BC973CA,
+ 0x22F1A457, 0x479618EF, 0xA939ADFD, 0xCC5E1145,
+ 0x06EE4D76, 0x6389F1CE, 0x8D2644DC, 0xE841F864,
+ 0x51792FF9, 0x341E9341, 0xDAB12653, 0xBFD69AEB,
+ 0xE9C6F9B3, 0x8CA1450B, 0x620EF019, 0x07694CA1,
+ 0xBE519B3C, 0xDB362784, 0x35999296, 0x50FE2E2E,
+ 0x99B95426, 0xFCDEE89E, 0x12715D8C, 0x7716E134,
+ 0xCE2E36A9, 0xAB498A11, 0x45E63F03, 0x208183BB,
+ 0x7691E0E3, 0x13F65C5B, 0xFD59E949, 0x983E55F1,
+ 0x2106826C, 0x44613ED4, 0xAACE8BC6, 0xCFA9377E,
+ 0x38417FD6, 0x5D26C36E, 0xB389767C, 0xD6EECAC4,
+ 0x6FD61D59, 0x0AB1A1E1, 0xE41E14F3, 0x8179A84B,
+ 0xD769CB13, 0xB20E77AB, 0x5CA1C2B9, 0x39C67E01,
+ 0x80FEA99C, 0xE5991524, 0x0B36A036, 0x6E511C8E,
+ 0xA7166686, 0xC271DA3E, 0x2CDE6F2C, 0x49B9D394,
+ 0xF0810409, 0x95E6B8B1, 0x7B490DA3, 0x1E2EB11B,
+ 0x483ED243, 0x2D596EFB, 0xC3F6DBE9, 0xA6916751,
+ 0x1FA9B0CC, 0x7ACE0C74, 0x9461B966, 0xF10605DE
+ }, {
+ 0x00000000, 0xB029603D, 0x6053C07A, 0xD07AA047,
+ 0xC0A680F5, 0x708FE0C8, 0xA0F5408F, 0x10DC20B2,
+ 0xC14B7030, 0x7162100D, 0xA118B04A, 0x1131D077,
+ 0x01EDF0C5, 0xB1C490F8, 0x61BE30BF, 0xD1975082,
+ 0x8297E060, 0x32BE805D, 0xE2C4201A, 0x52ED4027,
+ 0x42316095, 0xF21800A8, 0x2262A0EF, 0x924BC0D2,
+ 0x43DC9050, 0xF3F5F06D, 0x238F502A, 0x93A63017,
+ 0x837A10A5, 0x33537098, 0xE329D0DF, 0x5300B0E2,
+ 0x042FC1C1, 0xB406A1FC, 0x647C01BB, 0xD4556186,
+ 0xC4894134, 0x74A02109, 0xA4DA814E, 0x14F3E173,
+ 0xC564B1F1, 0x754DD1CC, 0xA537718B, 0x151E11B6,
+ 0x05C23104, 0xB5EB5139, 0x6591F17E, 0xD5B89143,
+ 0x86B821A1, 0x3691419C, 0xE6EBE1DB, 0x56C281E6,
+ 0x461EA154, 0xF637C169, 0x264D612E, 0x96640113,
+ 0x47F35191, 0xF7DA31AC, 0x27A091EB, 0x9789F1D6,
+ 0x8755D164, 0x377CB159, 0xE706111E, 0x572F7123,
+ 0x4958F358, 0xF9719365, 0x290B3322, 0x9922531F,
+ 0x89FE73AD, 0x39D71390, 0xE9ADB3D7, 0x5984D3EA,
+ 0x88138368, 0x383AE355, 0xE8404312, 0x5869232F,
+ 0x48B5039D, 0xF89C63A0, 0x28E6C3E7, 0x98CFA3DA,
+ 0xCBCF1338, 0x7BE67305, 0xAB9CD342, 0x1BB5B37F,
+ 0x0B6993CD, 0xBB40F3F0, 0x6B3A53B7, 0xDB13338A,
+ 0x0A846308, 0xBAAD0335, 0x6AD7A372, 0xDAFEC34F,
+ 0xCA22E3FD, 0x7A0B83C0, 0xAA712387, 0x1A5843BA,
+ 0x4D773299, 0xFD5E52A4, 0x2D24F2E3, 0x9D0D92DE,
+ 0x8DD1B26C, 0x3DF8D251, 0xED827216, 0x5DAB122B,
+ 0x8C3C42A9, 0x3C152294, 0xEC6F82D3, 0x5C46E2EE,
+ 0x4C9AC25C, 0xFCB3A261, 0x2CC90226, 0x9CE0621B,
+ 0xCFE0D2F9, 0x7FC9B2C4, 0xAFB31283, 0x1F9A72BE,
+ 0x0F46520C, 0xBF6F3231, 0x6F159276, 0xDF3CF24B,
+ 0x0EABA2C9, 0xBE82C2F4, 0x6EF862B3, 0xDED1028E,
+ 0xCE0D223C, 0x7E244201, 0xAE5EE246, 0x1E77827B,
+ 0x92B0E6B1, 0x2299868C, 0xF2E326CB, 0x42CA46F6,
+ 0x52166644, 0xE23F0679, 0x3245A63E, 0x826CC603,
+ 0x53FB9681, 0xE3D2F6BC, 0x33A856FB, 0x838136C6,
+ 0x935D1674, 0x23747649, 0xF30ED60E, 0x4327B633,
+ 0x102706D1, 0xA00E66EC, 0x7074C6AB, 0xC05DA696,
+ 0xD0818624, 0x60A8E619, 0xB0D2465E, 0x00FB2663,
+ 0xD16C76E1, 0x614516DC, 0xB13FB69B, 0x0116D6A6,
+ 0x11CAF614, 0xA1E39629, 0x7199366E, 0xC1B05653,
+ 0x969F2770, 0x26B6474D, 0xF6CCE70A, 0x46E58737,
+ 0x5639A785, 0xE610C7B8, 0x366A67FF, 0x864307C2,
+ 0x57D45740, 0xE7FD377D, 0x3787973A, 0x87AEF707,
+ 0x9772D7B5, 0x275BB788, 0xF72117CF, 0x470877F2,
+ 0x1408C710, 0xA421A72D, 0x745B076A, 0xC4726757,
+ 0xD4AE47E5, 0x648727D8, 0xB4FD879F, 0x04D4E7A2,
+ 0xD543B720, 0x656AD71D, 0xB510775A, 0x05391767,
+ 0x15E537D5, 0xA5CC57E8, 0x75B6F7AF, 0xC59F9792,
+ 0xDBE815E9, 0x6BC175D4, 0xBBBBD593, 0x0B92B5AE,
+ 0x1B4E951C, 0xAB67F521, 0x7B1D5566, 0xCB34355B,
+ 0x1AA365D9, 0xAA8A05E4, 0x7AF0A5A3, 0xCAD9C59E,
+ 0xDA05E52C, 0x6A2C8511, 0xBA562556, 0x0A7F456B,
+ 0x597FF589, 0xE95695B4, 0x392C35F3, 0x890555CE,
+ 0x99D9757C, 0x29F01541, 0xF98AB506, 0x49A3D53B,
+ 0x983485B9, 0x281DE584, 0xF86745C3, 0x484E25FE,
+ 0x5892054C, 0xE8BB6571, 0x38C1C536, 0x88E8A50B,
+ 0xDFC7D428, 0x6FEEB415, 0xBF941452, 0x0FBD746F,
+ 0x1F6154DD, 0xAF4834E0, 0x7F3294A7, 0xCF1BF49A,
+ 0x1E8CA418, 0xAEA5C425, 0x7EDF6462, 0xCEF6045F,
+ 0xDE2A24ED, 0x6E0344D0, 0xBE79E497, 0x0E5084AA,
+ 0x5D503448, 0xED795475, 0x3D03F432, 0x8D2A940F,
+ 0x9DF6B4BD, 0x2DDFD480, 0xFDA574C7, 0x4D8C14FA,
+ 0x9C1B4478, 0x2C322445, 0xFC488402, 0x4C61E43F,
+ 0x5CBDC48D, 0xEC94A4B0, 0x3CEE04F7, 0x8CC764CA
+ }, {
+ 0x00000000, 0xA5D35CCB, 0x0BA1C84D, 0xAE729486,
+ 0x1642919B, 0xB391CD50, 0x1DE359D6, 0xB830051D,
+ 0x6D8253EC, 0xC8510F27, 0x66239BA1, 0xC3F0C76A,
+ 0x7BC0C277, 0xDE139EBC, 0x70610A3A, 0xD5B256F1,
+ 0x9B02D603, 0x3ED18AC8, 0x90A31E4E, 0x35704285,
+ 0x8D404798, 0x28931B53, 0x86E18FD5, 0x2332D31E,
+ 0xF68085EF, 0x5353D924, 0xFD214DA2, 0x58F21169,
+ 0xE0C21474, 0x451148BF, 0xEB63DC39, 0x4EB080F2,
+ 0x3605AC07, 0x93D6F0CC, 0x3DA4644A, 0x98773881,
+ 0x20473D9C, 0x85946157, 0x2BE6F5D1, 0x8E35A91A,
+ 0x5B87FFEB, 0xFE54A320, 0x502637A6, 0xF5F56B6D,
+ 0x4DC56E70, 0xE81632BB, 0x4664A63D, 0xE3B7FAF6,
+ 0xAD077A04, 0x08D426CF, 0xA6A6B249, 0x0375EE82,
+ 0xBB45EB9F, 0x1E96B754, 0xB0E423D2, 0x15377F19,
+ 0xC08529E8, 0x65567523, 0xCB24E1A5, 0x6EF7BD6E,
+ 0xD6C7B873, 0x7314E4B8, 0xDD66703E, 0x78B52CF5,
+ 0x6C0A580F, 0xC9D904C4, 0x67AB9042, 0xC278CC89,
+ 0x7A48C994, 0xDF9B955F, 0x71E901D9, 0xD43A5D12,
+ 0x01880BE3, 0xA45B5728, 0x0A29C3AE, 0xAFFA9F65,
+ 0x17CA9A78, 0xB219C6B3, 0x1C6B5235, 0xB9B80EFE,
+ 0xF7088E0C, 0x52DBD2C7, 0xFCA94641, 0x597A1A8A,
+ 0xE14A1F97, 0x4499435C, 0xEAEBD7DA, 0x4F388B11,
+ 0x9A8ADDE0, 0x3F59812B, 0x912B15AD, 0x34F84966,
+ 0x8CC84C7B, 0x291B10B0, 0x87698436, 0x22BAD8FD,
+ 0x5A0FF408, 0xFFDCA8C3, 0x51AE3C45, 0xF47D608E,
+ 0x4C4D6593, 0xE99E3958, 0x47ECADDE, 0xE23FF115,
+ 0x378DA7E4, 0x925EFB2F, 0x3C2C6FA9, 0x99FF3362,
+ 0x21CF367F, 0x841C6AB4, 0x2A6EFE32, 0x8FBDA2F9,
+ 0xC10D220B, 0x64DE7EC0, 0xCAACEA46, 0x6F7FB68D,
+ 0xD74FB390, 0x729CEF5B, 0xDCEE7BDD, 0x793D2716,
+ 0xAC8F71E7, 0x095C2D2C, 0xA72EB9AA, 0x02FDE561,
+ 0xBACDE07C, 0x1F1EBCB7, 0xB16C2831, 0x14BF74FA,
+ 0xD814B01E, 0x7DC7ECD5, 0xD3B57853, 0x76662498,
+ 0xCE562185, 0x6B857D4E, 0xC5F7E9C8, 0x6024B503,
+ 0xB596E3F2, 0x1045BF39, 0xBE372BBF, 0x1BE47774,
+ 0xA3D47269, 0x06072EA2, 0xA875BA24, 0x0DA6E6EF,
+ 0x4316661D, 0xE6C53AD6, 0x48B7AE50, 0xED64F29B,
+ 0x5554F786, 0xF087AB4D, 0x5EF53FCB, 0xFB266300,
+ 0x2E9435F1, 0x8B47693A, 0x2535FDBC, 0x80E6A177,
+ 0x38D6A46A, 0x9D05F8A1, 0x33776C27, 0x96A430EC,
+ 0xEE111C19, 0x4BC240D2, 0xE5B0D454, 0x4063889F,
+ 0xF8538D82, 0x5D80D149, 0xF3F245CF, 0x56211904,
+ 0x83934FF5, 0x2640133E, 0x883287B8, 0x2DE1DB73,
+ 0x95D1DE6E, 0x300282A5, 0x9E701623, 0x3BA34AE8,
+ 0x7513CA1A, 0xD0C096D1, 0x7EB20257, 0xDB615E9C,
+ 0x63515B81, 0xC682074A, 0x68F093CC, 0xCD23CF07,
+ 0x189199F6, 0xBD42C53D, 0x133051BB, 0xB6E30D70,
+ 0x0ED3086D, 0xAB0054A6, 0x0572C020, 0xA0A19CEB,
+ 0xB41EE811, 0x11CDB4DA, 0xBFBF205C, 0x1A6C7C97,
+ 0xA25C798A, 0x078F2541, 0xA9FDB1C7, 0x0C2EED0C,
+ 0xD99CBBFD, 0x7C4FE736, 0xD23D73B0, 0x77EE2F7B,
+ 0xCFDE2A66, 0x6A0D76AD, 0xC47FE22B, 0x61ACBEE0,
+ 0x2F1C3E12, 0x8ACF62D9, 0x24BDF65F, 0x816EAA94,
+ 0x395EAF89, 0x9C8DF342, 0x32FF67C4, 0x972C3B0F,
+ 0x429E6DFE, 0xE74D3135, 0x493FA5B3, 0xECECF978,
+ 0x54DCFC65, 0xF10FA0AE, 0x5F7D3428, 0xFAAE68E3,
+ 0x821B4416, 0x27C818DD, 0x89BA8C5B, 0x2C69D090,
+ 0x9459D58D, 0x318A8946, 0x9FF81DC0, 0x3A2B410B,
+ 0xEF9917FA, 0x4A4A4B31, 0xE438DFB7, 0x41EB837C,
+ 0xF9DB8661, 0x5C08DAAA, 0xF27A4E2C, 0x57A912E7,
+ 0x19199215, 0xBCCACEDE, 0x12B85A58, 0xB76B0693,
+ 0x0F5B038E, 0xAA885F45, 0x04FACBC3, 0xA1299708,
+ 0x749BC1F9, 0xD1489D32, 0x7F3A09B4, 0xDAE9557F,
+ 0x62D95062, 0xC70A0CA9, 0x6978982F, 0xCCABC4E4
+ }, {
+ 0x00000000, 0xB40B77A6, 0x29119F97, 0x9D1AE831,
+ 0x13244FF4, 0xA72F3852, 0x3A35D063, 0x8E3EA7C5,
+ 0x674EEF33, 0xD3459895, 0x4E5F70A4, 0xFA540702,
+ 0x746AA0C7, 0xC061D761, 0x5D7B3F50, 0xE97048F6,
+ 0xCE9CDE67, 0x7A97A9C1, 0xE78D41F0, 0x53863656,
+ 0xDDB89193, 0x69B3E635, 0xF4A90E04, 0x40A279A2,
+ 0xA9D23154, 0x1DD946F2, 0x80C3AEC3, 0x34C8D965,
+ 0xBAF67EA0, 0x0EFD0906, 0x93E7E137, 0x27EC9691,
+ 0x9C39BDCF, 0x2832CA69, 0xB5282258, 0x012355FE,
+ 0x8F1DF23B, 0x3B16859D, 0xA60C6DAC, 0x12071A0A,
+ 0xFB7752FC, 0x4F7C255A, 0xD266CD6B, 0x666DBACD,
+ 0xE8531D08, 0x5C586AAE, 0xC142829F, 0x7549F539,
+ 0x52A563A8, 0xE6AE140E, 0x7BB4FC3F, 0xCFBF8B99,
+ 0x41812C5C, 0xF58A5BFA, 0x6890B3CB, 0xDC9BC46D,
+ 0x35EB8C9B, 0x81E0FB3D, 0x1CFA130C, 0xA8F164AA,
+ 0x26CFC36F, 0x92C4B4C9, 0x0FDE5CF8, 0xBBD52B5E,
+ 0x79750B44, 0xCD7E7CE2, 0x506494D3, 0xE46FE375,
+ 0x6A5144B0, 0xDE5A3316, 0x4340DB27, 0xF74BAC81,
+ 0x1E3BE477, 0xAA3093D1, 0x372A7BE0, 0x83210C46,
+ 0x0D1FAB83, 0xB914DC25, 0x240E3414, 0x900543B2,
+ 0xB7E9D523, 0x03E2A285, 0x9EF84AB4, 0x2AF33D12,
+ 0xA4CD9AD7, 0x10C6ED71, 0x8DDC0540, 0x39D772E6,
+ 0xD0A73A10, 0x64AC4DB6, 0xF9B6A587, 0x4DBDD221,
+ 0xC38375E4, 0x77880242, 0xEA92EA73, 0x5E999DD5,
+ 0xE54CB68B, 0x5147C12D, 0xCC5D291C, 0x78565EBA,
+ 0xF668F97F, 0x42638ED9, 0xDF7966E8, 0x6B72114E,
+ 0x820259B8, 0x36092E1E, 0xAB13C62F, 0x1F18B189,
+ 0x9126164C, 0x252D61EA, 0xB83789DB, 0x0C3CFE7D,
+ 0x2BD068EC, 0x9FDB1F4A, 0x02C1F77B, 0xB6CA80DD,
+ 0x38F42718, 0x8CFF50BE, 0x11E5B88F, 0xA5EECF29,
+ 0x4C9E87DF, 0xF895F079, 0x658F1848, 0xD1846FEE,
+ 0x5FBAC82B, 0xEBB1BF8D, 0x76AB57BC, 0xC2A0201A,
+ 0xF2EA1688, 0x46E1612E, 0xDBFB891F, 0x6FF0FEB9,
+ 0xE1CE597C, 0x55C52EDA, 0xC8DFC6EB, 0x7CD4B14D,
+ 0x95A4F9BB, 0x21AF8E1D, 0xBCB5662C, 0x08BE118A,
+ 0x8680B64F, 0x328BC1E9, 0xAF9129D8, 0x1B9A5E7E,
+ 0x3C76C8EF, 0x887DBF49, 0x15675778, 0xA16C20DE,
+ 0x2F52871B, 0x9B59F0BD, 0x0643188C, 0xB2486F2A,
+ 0x5B3827DC, 0xEF33507A, 0x7229B84B, 0xC622CFED,
+ 0x481C6828, 0xFC171F8E, 0x610DF7BF, 0xD5068019,
+ 0x6ED3AB47, 0xDAD8DCE1, 0x47C234D0, 0xF3C94376,
+ 0x7DF7E4B3, 0xC9FC9315, 0x54E67B24, 0xE0ED0C82,
+ 0x099D4474, 0xBD9633D2, 0x208CDBE3, 0x9487AC45,
+ 0x1AB90B80, 0xAEB27C26, 0x33A89417, 0x87A3E3B1,
+ 0xA04F7520, 0x14440286, 0x895EEAB7, 0x3D559D11,
+ 0xB36B3AD4, 0x07604D72, 0x9A7AA543, 0x2E71D2E5,
+ 0xC7019A13, 0x730AEDB5, 0xEE100584, 0x5A1B7222,
+ 0xD425D5E7, 0x602EA241, 0xFD344A70, 0x493F3DD6,
+ 0x8B9F1DCC, 0x3F946A6A, 0xA28E825B, 0x1685F5FD,
+ 0x98BB5238, 0x2CB0259E, 0xB1AACDAF, 0x05A1BA09,
+ 0xECD1F2FF, 0x58DA8559, 0xC5C06D68, 0x71CB1ACE,
+ 0xFFF5BD0B, 0x4BFECAAD, 0xD6E4229C, 0x62EF553A,
+ 0x4503C3AB, 0xF108B40D, 0x6C125C3C, 0xD8192B9A,
+ 0x56278C5F, 0xE22CFBF9, 0x7F3613C8, 0xCB3D646E,
+ 0x224D2C98, 0x96465B3E, 0x0B5CB30F, 0xBF57C4A9,
+ 0x3169636C, 0x856214CA, 0x1878FCFB, 0xAC738B5D,
+ 0x17A6A003, 0xA3ADD7A5, 0x3EB73F94, 0x8ABC4832,
+ 0x0482EFF7, 0xB0899851, 0x2D937060, 0x999807C6,
+ 0x70E84F30, 0xC4E33896, 0x59F9D0A7, 0xEDF2A701,
+ 0x63CC00C4, 0xD7C77762, 0x4ADD9F53, 0xFED6E8F5,
+ 0xD93A7E64, 0x6D3109C2, 0xF02BE1F3, 0x44209655,
+ 0xCA1E3190, 0x7E154636, 0xE30FAE07, 0x5704D9A1,
+ 0xBE749157, 0x0A7FE6F1, 0x97650EC0, 0x236E7966,
+ 0xAD50DEA3, 0x195BA905, 0x84414134, 0x304A3692
+ }, {
+ 0x00000000, 0x9E00AACC, 0x7D072542, 0xE3078F8E,
+ 0xFA0E4A84, 0x640EE048, 0x87096FC6, 0x1909C50A,
+ 0xB51BE5D3, 0x2B1B4F1F, 0xC81CC091, 0x561C6A5D,
+ 0x4F15AF57, 0xD115059B, 0x32128A15, 0xAC1220D9,
+ 0x2B31BB7C, 0xB53111B0, 0x56369E3E, 0xC83634F2,
+ 0xD13FF1F8, 0x4F3F5B34, 0xAC38D4BA, 0x32387E76,
+ 0x9E2A5EAF, 0x002AF463, 0xE32D7BED, 0x7D2DD121,
+ 0x6424142B, 0xFA24BEE7, 0x19233169, 0x87239BA5,
+ 0x566276F9, 0xC862DC35, 0x2B6553BB, 0xB565F977,
+ 0xAC6C3C7D, 0x326C96B1, 0xD16B193F, 0x4F6BB3F3,
+ 0xE379932A, 0x7D7939E6, 0x9E7EB668, 0x007E1CA4,
+ 0x1977D9AE, 0x87777362, 0x6470FCEC, 0xFA705620,
+ 0x7D53CD85, 0xE3536749, 0x0054E8C7, 0x9E54420B,
+ 0x875D8701, 0x195D2DCD, 0xFA5AA243, 0x645A088F,
+ 0xC8482856, 0x5648829A, 0xB54F0D14, 0x2B4FA7D8,
+ 0x324662D2, 0xAC46C81E, 0x4F414790, 0xD141ED5C,
+ 0xEDC29D29, 0x73C237E5, 0x90C5B86B, 0x0EC512A7,
+ 0x17CCD7AD, 0x89CC7D61, 0x6ACBF2EF, 0xF4CB5823,
+ 0x58D978FA, 0xC6D9D236, 0x25DE5DB8, 0xBBDEF774,
+ 0xA2D7327E, 0x3CD798B2, 0xDFD0173C, 0x41D0BDF0,
+ 0xC6F32655, 0x58F38C99, 0xBBF40317, 0x25F4A9DB,
+ 0x3CFD6CD1, 0xA2FDC61D, 0x41FA4993, 0xDFFAE35F,
+ 0x73E8C386, 0xEDE8694A, 0x0EEFE6C4, 0x90EF4C08,
+ 0x89E68902, 0x17E623CE, 0xF4E1AC40, 0x6AE1068C,
+ 0xBBA0EBD0, 0x25A0411C, 0xC6A7CE92, 0x58A7645E,
+ 0x41AEA154, 0xDFAE0B98, 0x3CA98416, 0xA2A92EDA,
+ 0x0EBB0E03, 0x90BBA4CF, 0x73BC2B41, 0xEDBC818D,
+ 0xF4B54487, 0x6AB5EE4B, 0x89B261C5, 0x17B2CB09,
+ 0x909150AC, 0x0E91FA60, 0xED9675EE, 0x7396DF22,
+ 0x6A9F1A28, 0xF49FB0E4, 0x17983F6A, 0x899895A6,
+ 0x258AB57F, 0xBB8A1FB3, 0x588D903D, 0xC68D3AF1,
+ 0xDF84FFFB, 0x41845537, 0xA283DAB9, 0x3C837075,
+ 0xDA853B53, 0x4485919F, 0xA7821E11, 0x3982B4DD,
+ 0x208B71D7, 0xBE8BDB1B, 0x5D8C5495, 0xC38CFE59,
+ 0x6F9EDE80, 0xF19E744C, 0x1299FBC2, 0x8C99510E,
+ 0x95909404, 0x0B903EC8, 0xE897B146, 0x76971B8A,
+ 0xF1B4802F, 0x6FB42AE3, 0x8CB3A56D, 0x12B30FA1,
+ 0x0BBACAAB, 0x95BA6067, 0x76BDEFE9, 0xE8BD4525,
+ 0x44AF65FC, 0xDAAFCF30, 0x39A840BE, 0xA7A8EA72,
+ 0xBEA12F78, 0x20A185B4, 0xC3A60A3A, 0x5DA6A0F6,
+ 0x8CE74DAA, 0x12E7E766, 0xF1E068E8, 0x6FE0C224,
+ 0x76E9072E, 0xE8E9ADE2, 0x0BEE226C, 0x95EE88A0,
+ 0x39FCA879, 0xA7FC02B5, 0x44FB8D3B, 0xDAFB27F7,
+ 0xC3F2E2FD, 0x5DF24831, 0xBEF5C7BF, 0x20F56D73,
+ 0xA7D6F6D6, 0x39D65C1A, 0xDAD1D394, 0x44D17958,
+ 0x5DD8BC52, 0xC3D8169E, 0x20DF9910, 0xBEDF33DC,
+ 0x12CD1305, 0x8CCDB9C9, 0x6FCA3647, 0xF1CA9C8B,
+ 0xE8C35981, 0x76C3F34D, 0x95C47CC3, 0x0BC4D60F,
+ 0x3747A67A, 0xA9470CB6, 0x4A408338, 0xD44029F4,
+ 0xCD49ECFE, 0x53494632, 0xB04EC9BC, 0x2E4E6370,
+ 0x825C43A9, 0x1C5CE965, 0xFF5B66EB, 0x615BCC27,
+ 0x7852092D, 0xE652A3E1, 0x05552C6F, 0x9B5586A3,
+ 0x1C761D06, 0x8276B7CA, 0x61713844, 0xFF719288,
+ 0xE6785782, 0x7878FD4E, 0x9B7F72C0, 0x057FD80C,
+ 0xA96DF8D5, 0x376D5219, 0xD46ADD97, 0x4A6A775B,
+ 0x5363B251, 0xCD63189D, 0x2E649713, 0xB0643DDF,
+ 0x6125D083, 0xFF257A4F, 0x1C22F5C1, 0x82225F0D,
+ 0x9B2B9A07, 0x052B30CB, 0xE62CBF45, 0x782C1589,
+ 0xD43E3550, 0x4A3E9F9C, 0xA9391012, 0x3739BADE,
+ 0x2E307FD4, 0xB030D518, 0x53375A96, 0xCD37F05A,
+ 0x4A146BFF, 0xD414C133, 0x37134EBD, 0xA913E471,
+ 0xB01A217B, 0x2E1A8BB7, 0xCD1D0439, 0x531DAEF5,
+ 0xFF0F8E2C, 0x610F24E0, 0x8208AB6E, 0x1C0801A2,
+ 0x0501C4A8, 0x9B016E64, 0x7806E1EA, 0xE6064B26
+ }
+};
diff --git a/src/liblzma/check/crc32_table_le.h b/src/liblzma/check/crc32_table_le.h
new file mode 100644
index 0000000..25f4fc4
--- /dev/null
+++ b/src/liblzma/check/crc32_table_le.h
@@ -0,0 +1,525 @@
+/* This file has been automatically generated by crc32_tablegen.c. */
+
+const uint32_t lzma_crc32_table[8][256] = {
+ {
+ 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
+ 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
+ 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+ 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
+ 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
+ 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+ 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
+ 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
+ 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+ 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
+ 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
+ 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+ 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
+ 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
+ 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+ 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
+ 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
+ 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+ 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
+ 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
+ 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+ 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
+ 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
+ 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+ 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
+ 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
+ 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+ 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
+ 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
+ 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+ 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
+ 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
+ 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+ 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
+ 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
+ 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+ 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
+ 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
+ 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+ 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
+ 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
+ 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+ 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
+ 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
+ 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+ 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
+ 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
+ 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+ 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
+ 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
+ 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+ 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
+ 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
+ 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+ 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
+ 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
+ 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+ 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
+ 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
+ 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+ 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
+ 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
+ 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+ 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+ }, {
+ 0x00000000, 0x191B3141, 0x32366282, 0x2B2D53C3,
+ 0x646CC504, 0x7D77F445, 0x565AA786, 0x4F4196C7,
+ 0xC8D98A08, 0xD1C2BB49, 0xFAEFE88A, 0xE3F4D9CB,
+ 0xACB54F0C, 0xB5AE7E4D, 0x9E832D8E, 0x87981CCF,
+ 0x4AC21251, 0x53D92310, 0x78F470D3, 0x61EF4192,
+ 0x2EAED755, 0x37B5E614, 0x1C98B5D7, 0x05838496,
+ 0x821B9859, 0x9B00A918, 0xB02DFADB, 0xA936CB9A,
+ 0xE6775D5D, 0xFF6C6C1C, 0xD4413FDF, 0xCD5A0E9E,
+ 0x958424A2, 0x8C9F15E3, 0xA7B24620, 0xBEA97761,
+ 0xF1E8E1A6, 0xE8F3D0E7, 0xC3DE8324, 0xDAC5B265,
+ 0x5D5DAEAA, 0x44469FEB, 0x6F6BCC28, 0x7670FD69,
+ 0x39316BAE, 0x202A5AEF, 0x0B07092C, 0x121C386D,
+ 0xDF4636F3, 0xC65D07B2, 0xED705471, 0xF46B6530,
+ 0xBB2AF3F7, 0xA231C2B6, 0x891C9175, 0x9007A034,
+ 0x179FBCFB, 0x0E848DBA, 0x25A9DE79, 0x3CB2EF38,
+ 0x73F379FF, 0x6AE848BE, 0x41C51B7D, 0x58DE2A3C,
+ 0xF0794F05, 0xE9627E44, 0xC24F2D87, 0xDB541CC6,
+ 0x94158A01, 0x8D0EBB40, 0xA623E883, 0xBF38D9C2,
+ 0x38A0C50D, 0x21BBF44C, 0x0A96A78F, 0x138D96CE,
+ 0x5CCC0009, 0x45D73148, 0x6EFA628B, 0x77E153CA,
+ 0xBABB5D54, 0xA3A06C15, 0x888D3FD6, 0x91960E97,
+ 0xDED79850, 0xC7CCA911, 0xECE1FAD2, 0xF5FACB93,
+ 0x7262D75C, 0x6B79E61D, 0x4054B5DE, 0x594F849F,
+ 0x160E1258, 0x0F152319, 0x243870DA, 0x3D23419B,
+ 0x65FD6BA7, 0x7CE65AE6, 0x57CB0925, 0x4ED03864,
+ 0x0191AEA3, 0x188A9FE2, 0x33A7CC21, 0x2ABCFD60,
+ 0xAD24E1AF, 0xB43FD0EE, 0x9F12832D, 0x8609B26C,
+ 0xC94824AB, 0xD05315EA, 0xFB7E4629, 0xE2657768,
+ 0x2F3F79F6, 0x362448B7, 0x1D091B74, 0x04122A35,
+ 0x4B53BCF2, 0x52488DB3, 0x7965DE70, 0x607EEF31,
+ 0xE7E6F3FE, 0xFEFDC2BF, 0xD5D0917C, 0xCCCBA03D,
+ 0x838A36FA, 0x9A9107BB, 0xB1BC5478, 0xA8A76539,
+ 0x3B83984B, 0x2298A90A, 0x09B5FAC9, 0x10AECB88,
+ 0x5FEF5D4F, 0x46F46C0E, 0x6DD93FCD, 0x74C20E8C,
+ 0xF35A1243, 0xEA412302, 0xC16C70C1, 0xD8774180,
+ 0x9736D747, 0x8E2DE606, 0xA500B5C5, 0xBC1B8484,
+ 0x71418A1A, 0x685ABB5B, 0x4377E898, 0x5A6CD9D9,
+ 0x152D4F1E, 0x0C367E5F, 0x271B2D9C, 0x3E001CDD,
+ 0xB9980012, 0xA0833153, 0x8BAE6290, 0x92B553D1,
+ 0xDDF4C516, 0xC4EFF457, 0xEFC2A794, 0xF6D996D5,
+ 0xAE07BCE9, 0xB71C8DA8, 0x9C31DE6B, 0x852AEF2A,
+ 0xCA6B79ED, 0xD37048AC, 0xF85D1B6F, 0xE1462A2E,
+ 0x66DE36E1, 0x7FC507A0, 0x54E85463, 0x4DF36522,
+ 0x02B2F3E5, 0x1BA9C2A4, 0x30849167, 0x299FA026,
+ 0xE4C5AEB8, 0xFDDE9FF9, 0xD6F3CC3A, 0xCFE8FD7B,
+ 0x80A96BBC, 0x99B25AFD, 0xB29F093E, 0xAB84387F,
+ 0x2C1C24B0, 0x350715F1, 0x1E2A4632, 0x07317773,
+ 0x4870E1B4, 0x516BD0F5, 0x7A468336, 0x635DB277,
+ 0xCBFAD74E, 0xD2E1E60F, 0xF9CCB5CC, 0xE0D7848D,
+ 0xAF96124A, 0xB68D230B, 0x9DA070C8, 0x84BB4189,
+ 0x03235D46, 0x1A386C07, 0x31153FC4, 0x280E0E85,
+ 0x674F9842, 0x7E54A903, 0x5579FAC0, 0x4C62CB81,
+ 0x8138C51F, 0x9823F45E, 0xB30EA79D, 0xAA1596DC,
+ 0xE554001B, 0xFC4F315A, 0xD7626299, 0xCE7953D8,
+ 0x49E14F17, 0x50FA7E56, 0x7BD72D95, 0x62CC1CD4,
+ 0x2D8D8A13, 0x3496BB52, 0x1FBBE891, 0x06A0D9D0,
+ 0x5E7EF3EC, 0x4765C2AD, 0x6C48916E, 0x7553A02F,
+ 0x3A1236E8, 0x230907A9, 0x0824546A, 0x113F652B,
+ 0x96A779E4, 0x8FBC48A5, 0xA4911B66, 0xBD8A2A27,
+ 0xF2CBBCE0, 0xEBD08DA1, 0xC0FDDE62, 0xD9E6EF23,
+ 0x14BCE1BD, 0x0DA7D0FC, 0x268A833F, 0x3F91B27E,
+ 0x70D024B9, 0x69CB15F8, 0x42E6463B, 0x5BFD777A,
+ 0xDC656BB5, 0xC57E5AF4, 0xEE530937, 0xF7483876,
+ 0xB809AEB1, 0xA1129FF0, 0x8A3FCC33, 0x9324FD72
+ }, {
+ 0x00000000, 0x01C26A37, 0x0384D46E, 0x0246BE59,
+ 0x0709A8DC, 0x06CBC2EB, 0x048D7CB2, 0x054F1685,
+ 0x0E1351B8, 0x0FD13B8F, 0x0D9785D6, 0x0C55EFE1,
+ 0x091AF964, 0x08D89353, 0x0A9E2D0A, 0x0B5C473D,
+ 0x1C26A370, 0x1DE4C947, 0x1FA2771E, 0x1E601D29,
+ 0x1B2F0BAC, 0x1AED619B, 0x18ABDFC2, 0x1969B5F5,
+ 0x1235F2C8, 0x13F798FF, 0x11B126A6, 0x10734C91,
+ 0x153C5A14, 0x14FE3023, 0x16B88E7A, 0x177AE44D,
+ 0x384D46E0, 0x398F2CD7, 0x3BC9928E, 0x3A0BF8B9,
+ 0x3F44EE3C, 0x3E86840B, 0x3CC03A52, 0x3D025065,
+ 0x365E1758, 0x379C7D6F, 0x35DAC336, 0x3418A901,
+ 0x3157BF84, 0x3095D5B3, 0x32D36BEA, 0x331101DD,
+ 0x246BE590, 0x25A98FA7, 0x27EF31FE, 0x262D5BC9,
+ 0x23624D4C, 0x22A0277B, 0x20E69922, 0x2124F315,
+ 0x2A78B428, 0x2BBADE1F, 0x29FC6046, 0x283E0A71,
+ 0x2D711CF4, 0x2CB376C3, 0x2EF5C89A, 0x2F37A2AD,
+ 0x709A8DC0, 0x7158E7F7, 0x731E59AE, 0x72DC3399,
+ 0x7793251C, 0x76514F2B, 0x7417F172, 0x75D59B45,
+ 0x7E89DC78, 0x7F4BB64F, 0x7D0D0816, 0x7CCF6221,
+ 0x798074A4, 0x78421E93, 0x7A04A0CA, 0x7BC6CAFD,
+ 0x6CBC2EB0, 0x6D7E4487, 0x6F38FADE, 0x6EFA90E9,
+ 0x6BB5866C, 0x6A77EC5B, 0x68315202, 0x69F33835,
+ 0x62AF7F08, 0x636D153F, 0x612BAB66, 0x60E9C151,
+ 0x65A6D7D4, 0x6464BDE3, 0x662203BA, 0x67E0698D,
+ 0x48D7CB20, 0x4915A117, 0x4B531F4E, 0x4A917579,
+ 0x4FDE63FC, 0x4E1C09CB, 0x4C5AB792, 0x4D98DDA5,
+ 0x46C49A98, 0x4706F0AF, 0x45404EF6, 0x448224C1,
+ 0x41CD3244, 0x400F5873, 0x4249E62A, 0x438B8C1D,
+ 0x54F16850, 0x55330267, 0x5775BC3E, 0x56B7D609,
+ 0x53F8C08C, 0x523AAABB, 0x507C14E2, 0x51BE7ED5,
+ 0x5AE239E8, 0x5B2053DF, 0x5966ED86, 0x58A487B1,
+ 0x5DEB9134, 0x5C29FB03, 0x5E6F455A, 0x5FAD2F6D,
+ 0xE1351B80, 0xE0F771B7, 0xE2B1CFEE, 0xE373A5D9,
+ 0xE63CB35C, 0xE7FED96B, 0xE5B86732, 0xE47A0D05,
+ 0xEF264A38, 0xEEE4200F, 0xECA29E56, 0xED60F461,
+ 0xE82FE2E4, 0xE9ED88D3, 0xEBAB368A, 0xEA695CBD,
+ 0xFD13B8F0, 0xFCD1D2C7, 0xFE976C9E, 0xFF5506A9,
+ 0xFA1A102C, 0xFBD87A1B, 0xF99EC442, 0xF85CAE75,
+ 0xF300E948, 0xF2C2837F, 0xF0843D26, 0xF1465711,
+ 0xF4094194, 0xF5CB2BA3, 0xF78D95FA, 0xF64FFFCD,
+ 0xD9785D60, 0xD8BA3757, 0xDAFC890E, 0xDB3EE339,
+ 0xDE71F5BC, 0xDFB39F8B, 0xDDF521D2, 0xDC374BE5,
+ 0xD76B0CD8, 0xD6A966EF, 0xD4EFD8B6, 0xD52DB281,
+ 0xD062A404, 0xD1A0CE33, 0xD3E6706A, 0xD2241A5D,
+ 0xC55EFE10, 0xC49C9427, 0xC6DA2A7E, 0xC7184049,
+ 0xC25756CC, 0xC3953CFB, 0xC1D382A2, 0xC011E895,
+ 0xCB4DAFA8, 0xCA8FC59F, 0xC8C97BC6, 0xC90B11F1,
+ 0xCC440774, 0xCD866D43, 0xCFC0D31A, 0xCE02B92D,
+ 0x91AF9640, 0x906DFC77, 0x922B422E, 0x93E92819,
+ 0x96A63E9C, 0x976454AB, 0x9522EAF2, 0x94E080C5,
+ 0x9FBCC7F8, 0x9E7EADCF, 0x9C381396, 0x9DFA79A1,
+ 0x98B56F24, 0x99770513, 0x9B31BB4A, 0x9AF3D17D,
+ 0x8D893530, 0x8C4B5F07, 0x8E0DE15E, 0x8FCF8B69,
+ 0x8A809DEC, 0x8B42F7DB, 0x89044982, 0x88C623B5,
+ 0x839A6488, 0x82580EBF, 0x801EB0E6, 0x81DCDAD1,
+ 0x8493CC54, 0x8551A663, 0x8717183A, 0x86D5720D,
+ 0xA9E2D0A0, 0xA820BA97, 0xAA6604CE, 0xABA46EF9,
+ 0xAEEB787C, 0xAF29124B, 0xAD6FAC12, 0xACADC625,
+ 0xA7F18118, 0xA633EB2F, 0xA4755576, 0xA5B73F41,
+ 0xA0F829C4, 0xA13A43F3, 0xA37CFDAA, 0xA2BE979D,
+ 0xB5C473D0, 0xB40619E7, 0xB640A7BE, 0xB782CD89,
+ 0xB2CDDB0C, 0xB30FB13B, 0xB1490F62, 0xB08B6555,
+ 0xBBD72268, 0xBA15485F, 0xB853F606, 0xB9919C31,
+ 0xBCDE8AB4, 0xBD1CE083, 0xBF5A5EDA, 0xBE9834ED
+ }, {
+ 0x00000000, 0xB8BC6765, 0xAA09C88B, 0x12B5AFEE,
+ 0x8F629757, 0x37DEF032, 0x256B5FDC, 0x9DD738B9,
+ 0xC5B428EF, 0x7D084F8A, 0x6FBDE064, 0xD7018701,
+ 0x4AD6BFB8, 0xF26AD8DD, 0xE0DF7733, 0x58631056,
+ 0x5019579F, 0xE8A530FA, 0xFA109F14, 0x42ACF871,
+ 0xDF7BC0C8, 0x67C7A7AD, 0x75720843, 0xCDCE6F26,
+ 0x95AD7F70, 0x2D111815, 0x3FA4B7FB, 0x8718D09E,
+ 0x1ACFE827, 0xA2738F42, 0xB0C620AC, 0x087A47C9,
+ 0xA032AF3E, 0x188EC85B, 0x0A3B67B5, 0xB28700D0,
+ 0x2F503869, 0x97EC5F0C, 0x8559F0E2, 0x3DE59787,
+ 0x658687D1, 0xDD3AE0B4, 0xCF8F4F5A, 0x7733283F,
+ 0xEAE41086, 0x525877E3, 0x40EDD80D, 0xF851BF68,
+ 0xF02BF8A1, 0x48979FC4, 0x5A22302A, 0xE29E574F,
+ 0x7F496FF6, 0xC7F50893, 0xD540A77D, 0x6DFCC018,
+ 0x359FD04E, 0x8D23B72B, 0x9F9618C5, 0x272A7FA0,
+ 0xBAFD4719, 0x0241207C, 0x10F48F92, 0xA848E8F7,
+ 0x9B14583D, 0x23A83F58, 0x311D90B6, 0x89A1F7D3,
+ 0x1476CF6A, 0xACCAA80F, 0xBE7F07E1, 0x06C36084,
+ 0x5EA070D2, 0xE61C17B7, 0xF4A9B859, 0x4C15DF3C,
+ 0xD1C2E785, 0x697E80E0, 0x7BCB2F0E, 0xC377486B,
+ 0xCB0D0FA2, 0x73B168C7, 0x6104C729, 0xD9B8A04C,
+ 0x446F98F5, 0xFCD3FF90, 0xEE66507E, 0x56DA371B,
+ 0x0EB9274D, 0xB6054028, 0xA4B0EFC6, 0x1C0C88A3,
+ 0x81DBB01A, 0x3967D77F, 0x2BD27891, 0x936E1FF4,
+ 0x3B26F703, 0x839A9066, 0x912F3F88, 0x299358ED,
+ 0xB4446054, 0x0CF80731, 0x1E4DA8DF, 0xA6F1CFBA,
+ 0xFE92DFEC, 0x462EB889, 0x549B1767, 0xEC277002,
+ 0x71F048BB, 0xC94C2FDE, 0xDBF98030, 0x6345E755,
+ 0x6B3FA09C, 0xD383C7F9, 0xC1366817, 0x798A0F72,
+ 0xE45D37CB, 0x5CE150AE, 0x4E54FF40, 0xF6E89825,
+ 0xAE8B8873, 0x1637EF16, 0x048240F8, 0xBC3E279D,
+ 0x21E91F24, 0x99557841, 0x8BE0D7AF, 0x335CB0CA,
+ 0xED59B63B, 0x55E5D15E, 0x47507EB0, 0xFFEC19D5,
+ 0x623B216C, 0xDA874609, 0xC832E9E7, 0x708E8E82,
+ 0x28ED9ED4, 0x9051F9B1, 0x82E4565F, 0x3A58313A,
+ 0xA78F0983, 0x1F336EE6, 0x0D86C108, 0xB53AA66D,
+ 0xBD40E1A4, 0x05FC86C1, 0x1749292F, 0xAFF54E4A,
+ 0x322276F3, 0x8A9E1196, 0x982BBE78, 0x2097D91D,
+ 0x78F4C94B, 0xC048AE2E, 0xD2FD01C0, 0x6A4166A5,
+ 0xF7965E1C, 0x4F2A3979, 0x5D9F9697, 0xE523F1F2,
+ 0x4D6B1905, 0xF5D77E60, 0xE762D18E, 0x5FDEB6EB,
+ 0xC2098E52, 0x7AB5E937, 0x680046D9, 0xD0BC21BC,
+ 0x88DF31EA, 0x3063568F, 0x22D6F961, 0x9A6A9E04,
+ 0x07BDA6BD, 0xBF01C1D8, 0xADB46E36, 0x15080953,
+ 0x1D724E9A, 0xA5CE29FF, 0xB77B8611, 0x0FC7E174,
+ 0x9210D9CD, 0x2AACBEA8, 0x38191146, 0x80A57623,
+ 0xD8C66675, 0x607A0110, 0x72CFAEFE, 0xCA73C99B,
+ 0x57A4F122, 0xEF189647, 0xFDAD39A9, 0x45115ECC,
+ 0x764DEE06, 0xCEF18963, 0xDC44268D, 0x64F841E8,
+ 0xF92F7951, 0x41931E34, 0x5326B1DA, 0xEB9AD6BF,
+ 0xB3F9C6E9, 0x0B45A18C, 0x19F00E62, 0xA14C6907,
+ 0x3C9B51BE, 0x842736DB, 0x96929935, 0x2E2EFE50,
+ 0x2654B999, 0x9EE8DEFC, 0x8C5D7112, 0x34E11677,
+ 0xA9362ECE, 0x118A49AB, 0x033FE645, 0xBB838120,
+ 0xE3E09176, 0x5B5CF613, 0x49E959FD, 0xF1553E98,
+ 0x6C820621, 0xD43E6144, 0xC68BCEAA, 0x7E37A9CF,
+ 0xD67F4138, 0x6EC3265D, 0x7C7689B3, 0xC4CAEED6,
+ 0x591DD66F, 0xE1A1B10A, 0xF3141EE4, 0x4BA87981,
+ 0x13CB69D7, 0xAB770EB2, 0xB9C2A15C, 0x017EC639,
+ 0x9CA9FE80, 0x241599E5, 0x36A0360B, 0x8E1C516E,
+ 0x866616A7, 0x3EDA71C2, 0x2C6FDE2C, 0x94D3B949,
+ 0x090481F0, 0xB1B8E695, 0xA30D497B, 0x1BB12E1E,
+ 0x43D23E48, 0xFB6E592D, 0xE9DBF6C3, 0x516791A6,
+ 0xCCB0A91F, 0x740CCE7A, 0x66B96194, 0xDE0506F1
+ }, {
+ 0x00000000, 0x3D6029B0, 0x7AC05360, 0x47A07AD0,
+ 0xF580A6C0, 0xC8E08F70, 0x8F40F5A0, 0xB220DC10,
+ 0x30704BC1, 0x0D106271, 0x4AB018A1, 0x77D03111,
+ 0xC5F0ED01, 0xF890C4B1, 0xBF30BE61, 0x825097D1,
+ 0x60E09782, 0x5D80BE32, 0x1A20C4E2, 0x2740ED52,
+ 0x95603142, 0xA80018F2, 0xEFA06222, 0xD2C04B92,
+ 0x5090DC43, 0x6DF0F5F3, 0x2A508F23, 0x1730A693,
+ 0xA5107A83, 0x98705333, 0xDFD029E3, 0xE2B00053,
+ 0xC1C12F04, 0xFCA106B4, 0xBB017C64, 0x866155D4,
+ 0x344189C4, 0x0921A074, 0x4E81DAA4, 0x73E1F314,
+ 0xF1B164C5, 0xCCD14D75, 0x8B7137A5, 0xB6111E15,
+ 0x0431C205, 0x3951EBB5, 0x7EF19165, 0x4391B8D5,
+ 0xA121B886, 0x9C419136, 0xDBE1EBE6, 0xE681C256,
+ 0x54A11E46, 0x69C137F6, 0x2E614D26, 0x13016496,
+ 0x9151F347, 0xAC31DAF7, 0xEB91A027, 0xD6F18997,
+ 0x64D15587, 0x59B17C37, 0x1E1106E7, 0x23712F57,
+ 0x58F35849, 0x659371F9, 0x22330B29, 0x1F532299,
+ 0xAD73FE89, 0x9013D739, 0xD7B3ADE9, 0xEAD38459,
+ 0x68831388, 0x55E33A38, 0x124340E8, 0x2F236958,
+ 0x9D03B548, 0xA0639CF8, 0xE7C3E628, 0xDAA3CF98,
+ 0x3813CFCB, 0x0573E67B, 0x42D39CAB, 0x7FB3B51B,
+ 0xCD93690B, 0xF0F340BB, 0xB7533A6B, 0x8A3313DB,
+ 0x0863840A, 0x3503ADBA, 0x72A3D76A, 0x4FC3FEDA,
+ 0xFDE322CA, 0xC0830B7A, 0x872371AA, 0xBA43581A,
+ 0x9932774D, 0xA4525EFD, 0xE3F2242D, 0xDE920D9D,
+ 0x6CB2D18D, 0x51D2F83D, 0x167282ED, 0x2B12AB5D,
+ 0xA9423C8C, 0x9422153C, 0xD3826FEC, 0xEEE2465C,
+ 0x5CC29A4C, 0x61A2B3FC, 0x2602C92C, 0x1B62E09C,
+ 0xF9D2E0CF, 0xC4B2C97F, 0x8312B3AF, 0xBE729A1F,
+ 0x0C52460F, 0x31326FBF, 0x7692156F, 0x4BF23CDF,
+ 0xC9A2AB0E, 0xF4C282BE, 0xB362F86E, 0x8E02D1DE,
+ 0x3C220DCE, 0x0142247E, 0x46E25EAE, 0x7B82771E,
+ 0xB1E6B092, 0x8C869922, 0xCB26E3F2, 0xF646CA42,
+ 0x44661652, 0x79063FE2, 0x3EA64532, 0x03C66C82,
+ 0x8196FB53, 0xBCF6D2E3, 0xFB56A833, 0xC6368183,
+ 0x74165D93, 0x49767423, 0x0ED60EF3, 0x33B62743,
+ 0xD1062710, 0xEC660EA0, 0xABC67470, 0x96A65DC0,
+ 0x248681D0, 0x19E6A860, 0x5E46D2B0, 0x6326FB00,
+ 0xE1766CD1, 0xDC164561, 0x9BB63FB1, 0xA6D61601,
+ 0x14F6CA11, 0x2996E3A1, 0x6E369971, 0x5356B0C1,
+ 0x70279F96, 0x4D47B626, 0x0AE7CCF6, 0x3787E546,
+ 0x85A73956, 0xB8C710E6, 0xFF676A36, 0xC2074386,
+ 0x4057D457, 0x7D37FDE7, 0x3A978737, 0x07F7AE87,
+ 0xB5D77297, 0x88B75B27, 0xCF1721F7, 0xF2770847,
+ 0x10C70814, 0x2DA721A4, 0x6A075B74, 0x576772C4,
+ 0xE547AED4, 0xD8278764, 0x9F87FDB4, 0xA2E7D404,
+ 0x20B743D5, 0x1DD76A65, 0x5A7710B5, 0x67173905,
+ 0xD537E515, 0xE857CCA5, 0xAFF7B675, 0x92979FC5,
+ 0xE915E8DB, 0xD475C16B, 0x93D5BBBB, 0xAEB5920B,
+ 0x1C954E1B, 0x21F567AB, 0x66551D7B, 0x5B3534CB,
+ 0xD965A31A, 0xE4058AAA, 0xA3A5F07A, 0x9EC5D9CA,
+ 0x2CE505DA, 0x11852C6A, 0x562556BA, 0x6B457F0A,
+ 0x89F57F59, 0xB49556E9, 0xF3352C39, 0xCE550589,
+ 0x7C75D999, 0x4115F029, 0x06B58AF9, 0x3BD5A349,
+ 0xB9853498, 0x84E51D28, 0xC34567F8, 0xFE254E48,
+ 0x4C059258, 0x7165BBE8, 0x36C5C138, 0x0BA5E888,
+ 0x28D4C7DF, 0x15B4EE6F, 0x521494BF, 0x6F74BD0F,
+ 0xDD54611F, 0xE03448AF, 0xA794327F, 0x9AF41BCF,
+ 0x18A48C1E, 0x25C4A5AE, 0x6264DF7E, 0x5F04F6CE,
+ 0xED242ADE, 0xD044036E, 0x97E479BE, 0xAA84500E,
+ 0x4834505D, 0x755479ED, 0x32F4033D, 0x0F942A8D,
+ 0xBDB4F69D, 0x80D4DF2D, 0xC774A5FD, 0xFA148C4D,
+ 0x78441B9C, 0x4524322C, 0x028448FC, 0x3FE4614C,
+ 0x8DC4BD5C, 0xB0A494EC, 0xF704EE3C, 0xCA64C78C
+ }, {
+ 0x00000000, 0xCB5CD3A5, 0x4DC8A10B, 0x869472AE,
+ 0x9B914216, 0x50CD91B3, 0xD659E31D, 0x1D0530B8,
+ 0xEC53826D, 0x270F51C8, 0xA19B2366, 0x6AC7F0C3,
+ 0x77C2C07B, 0xBC9E13DE, 0x3A0A6170, 0xF156B2D5,
+ 0x03D6029B, 0xC88AD13E, 0x4E1EA390, 0x85427035,
+ 0x9847408D, 0x531B9328, 0xD58FE186, 0x1ED33223,
+ 0xEF8580F6, 0x24D95353, 0xA24D21FD, 0x6911F258,
+ 0x7414C2E0, 0xBF481145, 0x39DC63EB, 0xF280B04E,
+ 0x07AC0536, 0xCCF0D693, 0x4A64A43D, 0x81387798,
+ 0x9C3D4720, 0x57619485, 0xD1F5E62B, 0x1AA9358E,
+ 0xEBFF875B, 0x20A354FE, 0xA6372650, 0x6D6BF5F5,
+ 0x706EC54D, 0xBB3216E8, 0x3DA66446, 0xF6FAB7E3,
+ 0x047A07AD, 0xCF26D408, 0x49B2A6A6, 0x82EE7503,
+ 0x9FEB45BB, 0x54B7961E, 0xD223E4B0, 0x197F3715,
+ 0xE82985C0, 0x23755665, 0xA5E124CB, 0x6EBDF76E,
+ 0x73B8C7D6, 0xB8E41473, 0x3E7066DD, 0xF52CB578,
+ 0x0F580A6C, 0xC404D9C9, 0x4290AB67, 0x89CC78C2,
+ 0x94C9487A, 0x5F959BDF, 0xD901E971, 0x125D3AD4,
+ 0xE30B8801, 0x28575BA4, 0xAEC3290A, 0x659FFAAF,
+ 0x789ACA17, 0xB3C619B2, 0x35526B1C, 0xFE0EB8B9,
+ 0x0C8E08F7, 0xC7D2DB52, 0x4146A9FC, 0x8A1A7A59,
+ 0x971F4AE1, 0x5C439944, 0xDAD7EBEA, 0x118B384F,
+ 0xE0DD8A9A, 0x2B81593F, 0xAD152B91, 0x6649F834,
+ 0x7B4CC88C, 0xB0101B29, 0x36846987, 0xFDD8BA22,
+ 0x08F40F5A, 0xC3A8DCFF, 0x453CAE51, 0x8E607DF4,
+ 0x93654D4C, 0x58399EE9, 0xDEADEC47, 0x15F13FE2,
+ 0xE4A78D37, 0x2FFB5E92, 0xA96F2C3C, 0x6233FF99,
+ 0x7F36CF21, 0xB46A1C84, 0x32FE6E2A, 0xF9A2BD8F,
+ 0x0B220DC1, 0xC07EDE64, 0x46EAACCA, 0x8DB67F6F,
+ 0x90B34FD7, 0x5BEF9C72, 0xDD7BEEDC, 0x16273D79,
+ 0xE7718FAC, 0x2C2D5C09, 0xAAB92EA7, 0x61E5FD02,
+ 0x7CE0CDBA, 0xB7BC1E1F, 0x31286CB1, 0xFA74BF14,
+ 0x1EB014D8, 0xD5ECC77D, 0x5378B5D3, 0x98246676,
+ 0x852156CE, 0x4E7D856B, 0xC8E9F7C5, 0x03B52460,
+ 0xF2E396B5, 0x39BF4510, 0xBF2B37BE, 0x7477E41B,
+ 0x6972D4A3, 0xA22E0706, 0x24BA75A8, 0xEFE6A60D,
+ 0x1D661643, 0xD63AC5E6, 0x50AEB748, 0x9BF264ED,
+ 0x86F75455, 0x4DAB87F0, 0xCB3FF55E, 0x006326FB,
+ 0xF135942E, 0x3A69478B, 0xBCFD3525, 0x77A1E680,
+ 0x6AA4D638, 0xA1F8059D, 0x276C7733, 0xEC30A496,
+ 0x191C11EE, 0xD240C24B, 0x54D4B0E5, 0x9F886340,
+ 0x828D53F8, 0x49D1805D, 0xCF45F2F3, 0x04192156,
+ 0xF54F9383, 0x3E134026, 0xB8873288, 0x73DBE12D,
+ 0x6EDED195, 0xA5820230, 0x2316709E, 0xE84AA33B,
+ 0x1ACA1375, 0xD196C0D0, 0x5702B27E, 0x9C5E61DB,
+ 0x815B5163, 0x4A0782C6, 0xCC93F068, 0x07CF23CD,
+ 0xF6999118, 0x3DC542BD, 0xBB513013, 0x700DE3B6,
+ 0x6D08D30E, 0xA65400AB, 0x20C07205, 0xEB9CA1A0,
+ 0x11E81EB4, 0xDAB4CD11, 0x5C20BFBF, 0x977C6C1A,
+ 0x8A795CA2, 0x41258F07, 0xC7B1FDA9, 0x0CED2E0C,
+ 0xFDBB9CD9, 0x36E74F7C, 0xB0733DD2, 0x7B2FEE77,
+ 0x662ADECF, 0xAD760D6A, 0x2BE27FC4, 0xE0BEAC61,
+ 0x123E1C2F, 0xD962CF8A, 0x5FF6BD24, 0x94AA6E81,
+ 0x89AF5E39, 0x42F38D9C, 0xC467FF32, 0x0F3B2C97,
+ 0xFE6D9E42, 0x35314DE7, 0xB3A53F49, 0x78F9ECEC,
+ 0x65FCDC54, 0xAEA00FF1, 0x28347D5F, 0xE368AEFA,
+ 0x16441B82, 0xDD18C827, 0x5B8CBA89, 0x90D0692C,
+ 0x8DD55994, 0x46898A31, 0xC01DF89F, 0x0B412B3A,
+ 0xFA1799EF, 0x314B4A4A, 0xB7DF38E4, 0x7C83EB41,
+ 0x6186DBF9, 0xAADA085C, 0x2C4E7AF2, 0xE712A957,
+ 0x15921919, 0xDECECABC, 0x585AB812, 0x93066BB7,
+ 0x8E035B0F, 0x455F88AA, 0xC3CBFA04, 0x089729A1,
+ 0xF9C19B74, 0x329D48D1, 0xB4093A7F, 0x7F55E9DA,
+ 0x6250D962, 0xA90C0AC7, 0x2F987869, 0xE4C4ABCC
+ }, {
+ 0x00000000, 0xA6770BB4, 0x979F1129, 0x31E81A9D,
+ 0xF44F2413, 0x52382FA7, 0x63D0353A, 0xC5A73E8E,
+ 0x33EF4E67, 0x959845D3, 0xA4705F4E, 0x020754FA,
+ 0xC7A06A74, 0x61D761C0, 0x503F7B5D, 0xF64870E9,
+ 0x67DE9CCE, 0xC1A9977A, 0xF0418DE7, 0x56368653,
+ 0x9391B8DD, 0x35E6B369, 0x040EA9F4, 0xA279A240,
+ 0x5431D2A9, 0xF246D91D, 0xC3AEC380, 0x65D9C834,
+ 0xA07EF6BA, 0x0609FD0E, 0x37E1E793, 0x9196EC27,
+ 0xCFBD399C, 0x69CA3228, 0x582228B5, 0xFE552301,
+ 0x3BF21D8F, 0x9D85163B, 0xAC6D0CA6, 0x0A1A0712,
+ 0xFC5277FB, 0x5A257C4F, 0x6BCD66D2, 0xCDBA6D66,
+ 0x081D53E8, 0xAE6A585C, 0x9F8242C1, 0x39F54975,
+ 0xA863A552, 0x0E14AEE6, 0x3FFCB47B, 0x998BBFCF,
+ 0x5C2C8141, 0xFA5B8AF5, 0xCBB39068, 0x6DC49BDC,
+ 0x9B8CEB35, 0x3DFBE081, 0x0C13FA1C, 0xAA64F1A8,
+ 0x6FC3CF26, 0xC9B4C492, 0xF85CDE0F, 0x5E2BD5BB,
+ 0x440B7579, 0xE27C7ECD, 0xD3946450, 0x75E36FE4,
+ 0xB044516A, 0x16335ADE, 0x27DB4043, 0x81AC4BF7,
+ 0x77E43B1E, 0xD19330AA, 0xE07B2A37, 0x460C2183,
+ 0x83AB1F0D, 0x25DC14B9, 0x14340E24, 0xB2430590,
+ 0x23D5E9B7, 0x85A2E203, 0xB44AF89E, 0x123DF32A,
+ 0xD79ACDA4, 0x71EDC610, 0x4005DC8D, 0xE672D739,
+ 0x103AA7D0, 0xB64DAC64, 0x87A5B6F9, 0x21D2BD4D,
+ 0xE47583C3, 0x42028877, 0x73EA92EA, 0xD59D995E,
+ 0x8BB64CE5, 0x2DC14751, 0x1C295DCC, 0xBA5E5678,
+ 0x7FF968F6, 0xD98E6342, 0xE86679DF, 0x4E11726B,
+ 0xB8590282, 0x1E2E0936, 0x2FC613AB, 0x89B1181F,
+ 0x4C162691, 0xEA612D25, 0xDB8937B8, 0x7DFE3C0C,
+ 0xEC68D02B, 0x4A1FDB9F, 0x7BF7C102, 0xDD80CAB6,
+ 0x1827F438, 0xBE50FF8C, 0x8FB8E511, 0x29CFEEA5,
+ 0xDF879E4C, 0x79F095F8, 0x48188F65, 0xEE6F84D1,
+ 0x2BC8BA5F, 0x8DBFB1EB, 0xBC57AB76, 0x1A20A0C2,
+ 0x8816EAF2, 0x2E61E146, 0x1F89FBDB, 0xB9FEF06F,
+ 0x7C59CEE1, 0xDA2EC555, 0xEBC6DFC8, 0x4DB1D47C,
+ 0xBBF9A495, 0x1D8EAF21, 0x2C66B5BC, 0x8A11BE08,
+ 0x4FB68086, 0xE9C18B32, 0xD82991AF, 0x7E5E9A1B,
+ 0xEFC8763C, 0x49BF7D88, 0x78576715, 0xDE206CA1,
+ 0x1B87522F, 0xBDF0599B, 0x8C184306, 0x2A6F48B2,
+ 0xDC27385B, 0x7A5033EF, 0x4BB82972, 0xEDCF22C6,
+ 0x28681C48, 0x8E1F17FC, 0xBFF70D61, 0x198006D5,
+ 0x47ABD36E, 0xE1DCD8DA, 0xD034C247, 0x7643C9F3,
+ 0xB3E4F77D, 0x1593FCC9, 0x247BE654, 0x820CEDE0,
+ 0x74449D09, 0xD23396BD, 0xE3DB8C20, 0x45AC8794,
+ 0x800BB91A, 0x267CB2AE, 0x1794A833, 0xB1E3A387,
+ 0x20754FA0, 0x86024414, 0xB7EA5E89, 0x119D553D,
+ 0xD43A6BB3, 0x724D6007, 0x43A57A9A, 0xE5D2712E,
+ 0x139A01C7, 0xB5ED0A73, 0x840510EE, 0x22721B5A,
+ 0xE7D525D4, 0x41A22E60, 0x704A34FD, 0xD63D3F49,
+ 0xCC1D9F8B, 0x6A6A943F, 0x5B828EA2, 0xFDF58516,
+ 0x3852BB98, 0x9E25B02C, 0xAFCDAAB1, 0x09BAA105,
+ 0xFFF2D1EC, 0x5985DA58, 0x686DC0C5, 0xCE1ACB71,
+ 0x0BBDF5FF, 0xADCAFE4B, 0x9C22E4D6, 0x3A55EF62,
+ 0xABC30345, 0x0DB408F1, 0x3C5C126C, 0x9A2B19D8,
+ 0x5F8C2756, 0xF9FB2CE2, 0xC813367F, 0x6E643DCB,
+ 0x982C4D22, 0x3E5B4696, 0x0FB35C0B, 0xA9C457BF,
+ 0x6C636931, 0xCA146285, 0xFBFC7818, 0x5D8B73AC,
+ 0x03A0A617, 0xA5D7ADA3, 0x943FB73E, 0x3248BC8A,
+ 0xF7EF8204, 0x519889B0, 0x6070932D, 0xC6079899,
+ 0x304FE870, 0x9638E3C4, 0xA7D0F959, 0x01A7F2ED,
+ 0xC400CC63, 0x6277C7D7, 0x539FDD4A, 0xF5E8D6FE,
+ 0x647E3AD9, 0xC209316D, 0xF3E12BF0, 0x55962044,
+ 0x90311ECA, 0x3646157E, 0x07AE0FE3, 0xA1D90457,
+ 0x579174BE, 0xF1E67F0A, 0xC00E6597, 0x66796E23,
+ 0xA3DE50AD, 0x05A95B19, 0x34414184, 0x92364A30
+ }, {
+ 0x00000000, 0xCCAA009E, 0x4225077D, 0x8E8F07E3,
+ 0x844A0EFA, 0x48E00E64, 0xC66F0987, 0x0AC50919,
+ 0xD3E51BB5, 0x1F4F1B2B, 0x91C01CC8, 0x5D6A1C56,
+ 0x57AF154F, 0x9B0515D1, 0x158A1232, 0xD92012AC,
+ 0x7CBB312B, 0xB01131B5, 0x3E9E3656, 0xF23436C8,
+ 0xF8F13FD1, 0x345B3F4F, 0xBAD438AC, 0x767E3832,
+ 0xAF5E2A9E, 0x63F42A00, 0xED7B2DE3, 0x21D12D7D,
+ 0x2B142464, 0xE7BE24FA, 0x69312319, 0xA59B2387,
+ 0xF9766256, 0x35DC62C8, 0xBB53652B, 0x77F965B5,
+ 0x7D3C6CAC, 0xB1966C32, 0x3F196BD1, 0xF3B36B4F,
+ 0x2A9379E3, 0xE639797D, 0x68B67E9E, 0xA41C7E00,
+ 0xAED97719, 0x62737787, 0xECFC7064, 0x205670FA,
+ 0x85CD537D, 0x496753E3, 0xC7E85400, 0x0B42549E,
+ 0x01875D87, 0xCD2D5D19, 0x43A25AFA, 0x8F085A64,
+ 0x562848C8, 0x9A824856, 0x140D4FB5, 0xD8A74F2B,
+ 0xD2624632, 0x1EC846AC, 0x9047414F, 0x5CED41D1,
+ 0x299DC2ED, 0xE537C273, 0x6BB8C590, 0xA712C50E,
+ 0xADD7CC17, 0x617DCC89, 0xEFF2CB6A, 0x2358CBF4,
+ 0xFA78D958, 0x36D2D9C6, 0xB85DDE25, 0x74F7DEBB,
+ 0x7E32D7A2, 0xB298D73C, 0x3C17D0DF, 0xF0BDD041,
+ 0x5526F3C6, 0x998CF358, 0x1703F4BB, 0xDBA9F425,
+ 0xD16CFD3C, 0x1DC6FDA2, 0x9349FA41, 0x5FE3FADF,
+ 0x86C3E873, 0x4A69E8ED, 0xC4E6EF0E, 0x084CEF90,
+ 0x0289E689, 0xCE23E617, 0x40ACE1F4, 0x8C06E16A,
+ 0xD0EBA0BB, 0x1C41A025, 0x92CEA7C6, 0x5E64A758,
+ 0x54A1AE41, 0x980BAEDF, 0x1684A93C, 0xDA2EA9A2,
+ 0x030EBB0E, 0xCFA4BB90, 0x412BBC73, 0x8D81BCED,
+ 0x8744B5F4, 0x4BEEB56A, 0xC561B289, 0x09CBB217,
+ 0xAC509190, 0x60FA910E, 0xEE7596ED, 0x22DF9673,
+ 0x281A9F6A, 0xE4B09FF4, 0x6A3F9817, 0xA6959889,
+ 0x7FB58A25, 0xB31F8ABB, 0x3D908D58, 0xF13A8DC6,
+ 0xFBFF84DF, 0x37558441, 0xB9DA83A2, 0x7570833C,
+ 0x533B85DA, 0x9F918544, 0x111E82A7, 0xDDB48239,
+ 0xD7718B20, 0x1BDB8BBE, 0x95548C5D, 0x59FE8CC3,
+ 0x80DE9E6F, 0x4C749EF1, 0xC2FB9912, 0x0E51998C,
+ 0x04949095, 0xC83E900B, 0x46B197E8, 0x8A1B9776,
+ 0x2F80B4F1, 0xE32AB46F, 0x6DA5B38C, 0xA10FB312,
+ 0xABCABA0B, 0x6760BA95, 0xE9EFBD76, 0x2545BDE8,
+ 0xFC65AF44, 0x30CFAFDA, 0xBE40A839, 0x72EAA8A7,
+ 0x782FA1BE, 0xB485A120, 0x3A0AA6C3, 0xF6A0A65D,
+ 0xAA4DE78C, 0x66E7E712, 0xE868E0F1, 0x24C2E06F,
+ 0x2E07E976, 0xE2ADE9E8, 0x6C22EE0B, 0xA088EE95,
+ 0x79A8FC39, 0xB502FCA7, 0x3B8DFB44, 0xF727FBDA,
+ 0xFDE2F2C3, 0x3148F25D, 0xBFC7F5BE, 0x736DF520,
+ 0xD6F6D6A7, 0x1A5CD639, 0x94D3D1DA, 0x5879D144,
+ 0x52BCD85D, 0x9E16D8C3, 0x1099DF20, 0xDC33DFBE,
+ 0x0513CD12, 0xC9B9CD8C, 0x4736CA6F, 0x8B9CCAF1,
+ 0x8159C3E8, 0x4DF3C376, 0xC37CC495, 0x0FD6C40B,
+ 0x7AA64737, 0xB60C47A9, 0x3883404A, 0xF42940D4,
+ 0xFEEC49CD, 0x32464953, 0xBCC94EB0, 0x70634E2E,
+ 0xA9435C82, 0x65E95C1C, 0xEB665BFF, 0x27CC5B61,
+ 0x2D095278, 0xE1A352E6, 0x6F2C5505, 0xA386559B,
+ 0x061D761C, 0xCAB77682, 0x44387161, 0x889271FF,
+ 0x825778E6, 0x4EFD7878, 0xC0727F9B, 0x0CD87F05,
+ 0xD5F86DA9, 0x19526D37, 0x97DD6AD4, 0x5B776A4A,
+ 0x51B26353, 0x9D1863CD, 0x1397642E, 0xDF3D64B0,
+ 0x83D02561, 0x4F7A25FF, 0xC1F5221C, 0x0D5F2282,
+ 0x079A2B9B, 0xCB302B05, 0x45BF2CE6, 0x89152C78,
+ 0x50353ED4, 0x9C9F3E4A, 0x121039A9, 0xDEBA3937,
+ 0xD47F302E, 0x18D530B0, 0x965A3753, 0x5AF037CD,
+ 0xFF6B144A, 0x33C114D4, 0xBD4E1337, 0x71E413A9,
+ 0x7B211AB0, 0xB78B1A2E, 0x39041DCD, 0xF5AE1D53,
+ 0x2C8E0FFF, 0xE0240F61, 0x6EAB0882, 0xA201081C,
+ 0xA8C40105, 0x646E019B, 0xEAE10678, 0x264B06E6
+ }
+};
diff --git a/src/liblzma/check/crc32_tablegen.c b/src/liblzma/check/crc32_tablegen.c
new file mode 100644
index 0000000..31a4d27
--- /dev/null
+++ b/src/liblzma/check/crc32_tablegen.c
@@ -0,0 +1,117 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc32_tablegen.c
+/// \brief Generate crc32_table_le.h and crc32_table_be.h
+///
+/// Compiling: gcc -std=c99 -o crc32_tablegen crc32_tablegen.c
+/// Add -DWORDS_BIGENDIAN to generate big endian table.
+/// Add -DLZ_HASH_TABLE to generate lz_encoder_hash_table.h (little endian).
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <stdio.h>
+#include "../../common/tuklib_integer.h"
+
+
+static uint32_t crc32_table[8][256];
+
+
+static void
+init_crc32_table(void)
+{
+ static const uint32_t poly32 = UINT32_C(0xEDB88320);
+
+ for (size_t s = 0; s < 8; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ uint32_t r = s == 0 ? b : crc32_table[s - 1][b];
+
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly32;
+ else
+ r >>= 1;
+ }
+
+ crc32_table[s][b] = r;
+ }
+ }
+
+#ifdef WORDS_BIGENDIAN
+ for (size_t s = 0; s < 8; ++s)
+ for (size_t b = 0; b < 256; ++b)
+ crc32_table[s][b] = bswap32(crc32_table[s][b]);
+#endif
+
+ return;
+}
+
+
+static void
+print_crc32_table(void)
+{
+ printf("/* This file has been automatically generated by "
+ "crc32_tablegen.c. */\n\n"
+ "const uint32_t lzma_crc32_table[8][256] = {\n\t{");
+
+ for (size_t s = 0; s < 8; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ if ((b % 4) == 0)
+ printf("\n\t\t");
+
+ printf("0x%08" PRIX32, crc32_table[s][b]);
+
+ if (b != 255)
+ printf(",%s", (b+1) % 4 == 0 ? "" : " ");
+ }
+
+ if (s == 7)
+ printf("\n\t}\n};\n");
+ else
+ printf("\n\t}, {");
+ }
+
+ return;
+}
+
+
+static void
+print_lz_table(void)
+{
+ printf("/* This file has been automatically generated by "
+ "crc32_tablegen.c. */\n\n"
+ "const uint32_t lzma_lz_hash_table[256] = {");
+
+ for (size_t b = 0; b < 256; ++b) {
+ if ((b % 4) == 0)
+ printf("\n\t");
+
+ printf("0x%08" PRIX32, crc32_table[0][b]);
+
+ if (b != 255)
+ printf(",%s", (b+1) % 4 == 0 ? "" : " ");
+ }
+
+ printf("\n};\n");
+
+ return;
+}
+
+
+int
+main(void)
+{
+ init_crc32_table();
+
+#ifdef LZ_HASH_TABLE
+ print_lz_table();
+#else
+ print_crc32_table();
+#endif
+
+ return 0;
+}
diff --git a/src/liblzma/check/crc32_x86.S b/src/liblzma/check/crc32_x86.S
new file mode 100644
index 0000000..4f395df
--- /dev/null
+++ b/src/liblzma/check/crc32_x86.S
@@ -0,0 +1,313 @@
+/*
+ * Speed-optimized CRC32 using slicing-by-eight algorithm
+ *
+ * This uses only i386 instructions, but it is optimized for i686 and later
+ * (including e.g. Pentium II/III/IV, Athlon XP, and Core 2). For i586
+ * (e.g. Pentium), slicing-by-four would be better, and even the C version
+ * of slicing-by-eight built with gcc -march=i586 tends to be a little bit
+ * better than this. Very few probably run this code on i586 or older x86
+ * so this shouldn't be a problem in practice.
+ *
+ * Authors: Igor Pavlov (original version)
+ * Lasse Collin (AT&T syntax, PIC support, better portability)
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ *
+ * This code needs lzma_crc32_table, which can be created using the
+ * following C code:
+
+uint32_t lzma_crc32_table[8][256];
+
+void
+init_table(void)
+{
+ // IEEE-802.3
+ static const uint32_t poly32 = UINT32_C(0xEDB88320);
+
+ // Castagnoli
+ // static const uint32_t poly32 = UINT32_C(0x82F63B78);
+
+ // Koopman
+ // static const uint32_t poly32 = UINT32_C(0xEB31D82E);
+
+ for (size_t s = 0; s < 8; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ uint32_t r = s == 0 ? b : lzma_crc32_table[s - 1][b];
+
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly32;
+ else
+ r >>= 1;
+ }
+
+ lzma_crc32_table[s][b] = r;
+ }
+ }
+}
+
+ * The prototype of the CRC32 function:
+ * extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc);
+ */
+
+/* When Intel CET is enabled, include <cet.h> in assembly code to mark
+ Intel CET support. */
+#ifdef __CET__
+# include <cet.h>
+#else
+# define _CET_ENDBR
+#endif
+
+/*
+ * On some systems, the functions need to be prefixed. The prefix is
+ * usually an underscore.
+ */
+#ifndef __USER_LABEL_PREFIX__
+# define __USER_LABEL_PREFIX__
+#endif
+#define MAKE_SYM_CAT(prefix, sym) prefix ## sym
+#define MAKE_SYM(prefix, sym) MAKE_SYM_CAT(prefix, sym)
+#define LZMA_CRC32 MAKE_SYM(__USER_LABEL_PREFIX__, lzma_crc32)
+#define LZMA_CRC32_TABLE MAKE_SYM(__USER_LABEL_PREFIX__, lzma_crc32_table)
+
+/*
+ * Solaris assembler doesn't have .p2align, and Darwin uses .align
+ * differently than GNU/Linux and Solaris.
+ */
+#if defined(__APPLE__) || defined(__MSDOS__)
+# define ALIGN(pow2, abs) .align pow2
+#else
+# define ALIGN(pow2, abs) .align abs
+#endif
+
+ .text
+ .globl LZMA_CRC32
+
+#if !defined(__APPLE__) && !defined(_WIN32) && !defined(__CYGWIN__) \
+ && !defined(__MSDOS__)
+ .type LZMA_CRC32, @function
+#endif
+
+ ALIGN(4, 16)
+LZMA_CRC32:
+ _CET_ENDBR
+ /*
+ * Register usage:
+ * %eax crc
+ * %esi buf
+ * %edi size or buf + size
+ * %ebx lzma_crc32_table
+ * %ebp Table index
+ * %ecx Temporary
+ * %edx Temporary
+ */
+ pushl %ebx
+ pushl %esi
+ pushl %edi
+ pushl %ebp
+ movl 0x14(%esp), %esi /* buf */
+ movl 0x18(%esp), %edi /* size */
+ movl 0x1C(%esp), %eax /* crc */
+
+ /*
+ * Store the address of lzma_crc32_table to %ebx. This is needed to
+ * get position-independent code (PIC).
+ *
+ * The PIC macro is defined by libtool, while __PIC__ is defined
+ * by GCC but only on some systems. Testing for both makes it simpler
+ * to test this code without libtool, and keeps the code working also
+ * when built with libtool but using something else than GCC.
+ *
+ * I understood that libtool may define PIC on Windows even though
+ * the code in Windows DLLs is not PIC in sense that it is in ELF
+ * binaries, so we need a separate check to always use the non-PIC
+ * code on Windows.
+ */
+#if (!defined(PIC) && !defined(__PIC__)) \
+ || (defined(_WIN32) || defined(__CYGWIN__))
+ /* Not PIC */
+ movl $ LZMA_CRC32_TABLE, %ebx
+#elif defined(__APPLE__)
+ /* Mach-O */
+ call .L_get_pc
+.L_pic:
+ leal .L_lzma_crc32_table$non_lazy_ptr-.L_pic(%ebx), %ebx
+ movl (%ebx), %ebx
+#else
+ /* ELF */
+ call .L_get_pc
+ addl $_GLOBAL_OFFSET_TABLE_, %ebx
+ movl LZMA_CRC32_TABLE@GOT(%ebx), %ebx
+#endif
+
+ /* Complement the initial value. */
+ notl %eax
+
+ ALIGN(4, 16)
+.L_align:
+ /*
+ * Check if there is enough input to use slicing-by-eight.
+ * We need 16 bytes, because the loop pre-reads eight bytes.
+ */
+ cmpl $16, %edi
+ jb .L_rest
+
+ /* Check if we have reached alignment of eight bytes. */
+ testl $7, %esi
+ jz .L_slice
+
+ /* Calculate CRC of the next input byte. */
+ movzbl (%esi), %ebp
+ incl %esi
+ movzbl %al, %ecx
+ xorl %ecx, %ebp
+ shrl $8, %eax
+ xorl (%ebx, %ebp, 4), %eax
+ decl %edi
+ jmp .L_align
+
+ ALIGN(2, 4)
+.L_slice:
+ /*
+ * If we get here, there's at least 16 bytes of aligned input
+ * available. Make %edi multiple of eight bytes. Store the possible
+ * remainder over the "size" variable in the argument stack.
+ */
+ movl %edi, 0x18(%esp)
+ andl $-8, %edi
+ subl %edi, 0x18(%esp)
+
+ /*
+ * Let %edi be buf + size - 8 while running the main loop. This way
+ * we can compare for equality to determine when exit the loop.
+ */
+ addl %esi, %edi
+ subl $8, %edi
+
+ /* Read in the first eight aligned bytes. */
+ xorl (%esi), %eax
+ movl 4(%esi), %ecx
+ movzbl %cl, %ebp
+
+.L_loop:
+ movl 0x0C00(%ebx, %ebp, 4), %edx
+ movzbl %ch, %ebp
+ xorl 0x0800(%ebx, %ebp, 4), %edx
+ shrl $16, %ecx
+ xorl 8(%esi), %edx
+ movzbl %cl, %ebp
+ xorl 0x0400(%ebx, %ebp, 4), %edx
+ movzbl %ch, %ebp
+ xorl (%ebx, %ebp, 4), %edx
+ movzbl %al, %ebp
+
+ /*
+ * Read the next four bytes, for which the CRC is calculated
+ * on the next iteration of the loop.
+ */
+ movl 12(%esi), %ecx
+
+ xorl 0x1C00(%ebx, %ebp, 4), %edx
+ movzbl %ah, %ebp
+ shrl $16, %eax
+ xorl 0x1800(%ebx, %ebp, 4), %edx
+ movzbl %ah, %ebp
+ movzbl %al, %eax
+ movl 0x1400(%ebx, %eax, 4), %eax
+ addl $8, %esi
+ xorl %edx, %eax
+ xorl 0x1000(%ebx, %ebp, 4), %eax
+
+ /* Check for end of aligned input. */
+ cmpl %edi, %esi
+ movzbl %cl, %ebp
+ jne .L_loop
+
+ /*
+ * Process the remaining eight bytes, which we have already
+ * copied to %ecx and %edx.
+ */
+ movl 0x0C00(%ebx, %ebp, 4), %edx
+ movzbl %ch, %ebp
+ xorl 0x0800(%ebx, %ebp, 4), %edx
+ shrl $16, %ecx
+ movzbl %cl, %ebp
+ xorl 0x0400(%ebx, %ebp, 4), %edx
+ movzbl %ch, %ebp
+ xorl (%ebx, %ebp, 4), %edx
+ movzbl %al, %ebp
+
+ xorl 0x1C00(%ebx, %ebp, 4), %edx
+ movzbl %ah, %ebp
+ shrl $16, %eax
+ xorl 0x1800(%ebx, %ebp, 4), %edx
+ movzbl %ah, %ebp
+ movzbl %al, %eax
+ movl 0x1400(%ebx, %eax, 4), %eax
+ addl $8, %esi
+ xorl %edx, %eax
+ xorl 0x1000(%ebx, %ebp, 4), %eax
+
+ /* Copy the number of remaining bytes to %edi. */
+ movl 0x18(%esp), %edi
+
+.L_rest:
+ /* Check for end of input. */
+ testl %edi, %edi
+ jz .L_return
+
+ /* Calculate CRC of the next input byte. */
+ movzbl (%esi), %ebp
+ incl %esi
+ movzbl %al, %ecx
+ xorl %ecx, %ebp
+ shrl $8, %eax
+ xorl (%ebx, %ebp, 4), %eax
+ decl %edi
+ jmp .L_rest
+
+.L_return:
+ /* Complement the final value. */
+ notl %eax
+
+ popl %ebp
+ popl %edi
+ popl %esi
+ popl %ebx
+ ret
+
+#if defined(PIC) || defined(__PIC__)
+ ALIGN(4, 16)
+.L_get_pc:
+ movl (%esp), %ebx
+ ret
+#endif
+
+#if defined(__APPLE__) && (defined(PIC) || defined(__PIC__))
+ /* Mach-O PIC */
+ .section __IMPORT,__pointers,non_lazy_symbol_pointers
+.L_lzma_crc32_table$non_lazy_ptr:
+ .indirect_symbol LZMA_CRC32_TABLE
+ .long 0
+
+#elif defined(_WIN32) || defined(__CYGWIN__)
+# ifdef DLL_EXPORT
+ /* This is equivalent of __declspec(dllexport). */
+ .section .drectve
+ .ascii " -export:lzma_crc32"
+# endif
+
+#elif !defined(__MSDOS__)
+ /* ELF */
+ .size LZMA_CRC32, .-LZMA_CRC32
+#endif
+
+/*
+ * This is needed to support non-executable stack. It's ugly to
+ * use __FreeBSD__ and __linux__ here, but I don't know a way to detect when
+ * we are using GNU assembler.
+ */
+#if defined(__ELF__) && (defined(__FreeBSD__) || defined(__linux__))
+ .section .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/liblzma/check/crc64_fast.c b/src/liblzma/check/crc64_fast.c
new file mode 100644
index 0000000..0c8622a
--- /dev/null
+++ b/src/liblzma/check/crc64_fast.c
@@ -0,0 +1,538 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc64.c
+/// \brief CRC64 calculation
+///
+/// There are two methods in this file. crc64_generic uses the
+/// the slice-by-four algorithm. This is the same idea that is
+/// used in crc32_fast.c, but for CRC64 we use only four tables
+/// instead of eight to avoid increasing CPU cache usage.
+///
+/// crc64_clmul uses 32/64-bit x86 SSSE3, SSE4.1, and CLMUL instructions.
+/// It was derived from
+/// https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
+/// and the public domain code from https://github.com/rawrunprotected/crc
+/// (URLs were checked on 2022-11-07).
+///
+/// FIXME: Builds for 32-bit x86 use crc64_x86.S by default instead
+/// of this file and thus CLMUL version isn't available on 32-bit x86
+/// unless configured with --disable-assembler. Even then the lookup table
+/// isn't omitted in crc64_table.c since it doesn't know that assembly
+/// code has been disabled.
+//
+// Authors: Lasse Collin
+// Ilya Kurdyukov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+#undef CRC_GENERIC
+#undef CRC_CLMUL
+#undef CRC_USE_GENERIC_FOR_SMALL_INPUTS
+
+// If CLMUL cannot be used then only the generic slice-by-four is built.
+#if !defined(HAVE_USABLE_CLMUL)
+# define CRC_GENERIC 1
+
+// If CLMUL is allowed unconditionally in the compiler options then the
+// generic version can be omitted. Note that this doesn't work with MSVC
+// as I don't know how to detect the features here.
+//
+// NOTE: Keep this this in sync with crc64_table.c.
+#elif (defined(__SSSE3__) && defined(__SSE4_1__) && defined(__PCLMUL__)) \
+ || (defined(__e2k__) && __iset__ >= 6)
+# define CRC_CLMUL 1
+
+// Otherwise build both and detect at runtime which version to use.
+#else
+# define CRC_GENERIC 1
+# define CRC_CLMUL 1
+
+/*
+ // The generic code is much faster with 1-8-byte inputs and has
+ // similar performance up to 16 bytes at least in microbenchmarks
+ // (it depends on input buffer alignment too). If both versions are
+ // built, this #define will use the generic version for inputs up to
+ // 16 bytes and CLMUL for bigger inputs. It saves a little in code
+ // size since the special cases for 0-16-byte inputs will be omitted
+ // from the CLMUL code.
+# define CRC_USE_GENERIC_FOR_SMALL_INPUTS 1
+*/
+
+# if defined(_MSC_VER)
+# include <intrin.h>
+# elif defined(HAVE_CPUID_H)
+# include <cpuid.h>
+# endif
+#endif
+
+
+/////////////////////////////////
+// Generic slice-by-four CRC64 //
+/////////////////////////////////
+
+#ifdef CRC_GENERIC
+
+#include "crc_macros.h"
+
+
+#ifdef WORDS_BIGENDIAN
+# define A1(x) ((x) >> 56)
+#else
+# define A1 A
+#endif
+
+
+// See the comments in crc32_fast.c. They aren't duplicated here.
+static uint64_t
+crc64_generic(const uint8_t *buf, size_t size, uint64_t crc)
+{
+ crc = ~crc;
+
+#ifdef WORDS_BIGENDIAN
+ crc = bswap64(crc);
+#endif
+
+ if (size > 4) {
+ while ((uintptr_t)(buf) & 3) {
+ crc = lzma_crc64_table[0][*buf++ ^ A1(crc)] ^ S8(crc);
+ --size;
+ }
+
+ const uint8_t *const limit = buf + (size & ~(size_t)(3));
+ size &= (size_t)(3);
+
+ while (buf < limit) {
+#ifdef WORDS_BIGENDIAN
+ const uint32_t tmp = (uint32_t)(crc >> 32)
+ ^ aligned_read32ne(buf);
+#else
+ const uint32_t tmp = (uint32_t)crc
+ ^ aligned_read32ne(buf);
+#endif
+ buf += 4;
+
+ crc = lzma_crc64_table[3][A(tmp)]
+ ^ lzma_crc64_table[2][B(tmp)]
+ ^ S32(crc)
+ ^ lzma_crc64_table[1][C(tmp)]
+ ^ lzma_crc64_table[0][D(tmp)];
+ }
+ }
+
+ while (size-- != 0)
+ crc = lzma_crc64_table[0][*buf++ ^ A1(crc)] ^ S8(crc);
+
+#ifdef WORDS_BIGENDIAN
+ crc = bswap64(crc);
+#endif
+
+ return ~crc;
+}
+#endif
+
+
+/////////////////////
+// x86 CLMUL CRC64 //
+/////////////////////
+
+#ifdef CRC_CLMUL
+
+#include <immintrin.h>
+
+
+/*
+// These functions were used to generate the constants
+// at the top of crc64_clmul().
+static uint64_t
+calc_lo(uint64_t poly)
+{
+ uint64_t a = poly;
+ uint64_t b = 0;
+
+ for (unsigned i = 0; i < 64; ++i) {
+ b = (b >> 1) | (a << 63);
+ a = (a >> 1) ^ (a & 1 ? poly : 0);
+ }
+
+ return b;
+}
+
+static uint64_t
+calc_hi(uint64_t poly, uint64_t a)
+{
+ for (unsigned i = 0; i < 64; ++i)
+ a = (a >> 1) ^ (a & 1 ? poly : 0);
+
+ return a;
+}
+*/
+
+
+#define MASK_L(in, mask, r) \
+ r = _mm_shuffle_epi8(in, mask)
+
+#define MASK_H(in, mask, r) \
+ r = _mm_shuffle_epi8(in, _mm_xor_si128(mask, vsign))
+
+#define MASK_LH(in, mask, low, high) \
+ MASK_L(in, mask, low); \
+ MASK_H(in, mask, high)
+
+
+// MSVC (VS2015 - VS2022) produces bad 32-bit x86 code from the CLMUL CRC
+// code when optimizations are enabled (release build). According to the bug
+// report, the ebx register is corrupted and the calculated result is wrong.
+// Trying to workaround the problem with "__asm mov ebx, ebx" didn't help.
+// The following pragma works and performance is still good. x86-64 builds
+// aren't affected by this problem.
+//
+// NOTE: Another pragma after the function restores the optimizations.
+// If the #if condition here is updated, the other one must be updated too.
+#if defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__) \
+ && defined(_M_IX86)
+# pragma optimize("g", off)
+#endif
+
+// EDG-based compilers (Intel's classic compiler and compiler for E2K) can
+// define __GNUC__ but the attribute must not be used with them.
+// The new Clang-based ICX needs the attribute.
+//
+// NOTE: Build systems check for this too, keep them in sync with this.
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__)
+__attribute__((__target__("ssse3,sse4.1,pclmul")))
+#endif
+// The intrinsics use 16-byte-aligned reads from buf, thus they may read
+// up to 15 bytes before or after the buffer (depending on the alignment
+// of the buf argument). The values of the extra bytes are ignored.
+// This unavoidably trips -fsanitize=address so address sanitizier has
+// to be disabled for this function.
+#if lzma_has_attribute(__no_sanitize_address__)
+__attribute__((__no_sanitize_address__))
+#endif
+static uint64_t
+crc64_clmul(const uint8_t *buf, size_t size, uint64_t crc)
+{
+ // The prototypes of the intrinsics use signed types while most of
+ // the values are treated as unsigned here. These warnings in this
+ // function have been checked and found to be harmless so silence them.
+#if TUKLIB_GNUC_REQ(4, 6) || defined(__clang__)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+# pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+#ifndef CRC_USE_GENERIC_FOR_SMALL_INPUTS
+ // The code assumes that there is at least one byte of input.
+ if (size == 0)
+ return crc;
+#endif
+
+ // const uint64_t poly = 0xc96c5795d7870f42; // CRC polynomial
+ const uint64_t p = 0x92d8af2baf0e1e85; // (poly << 1) | 1
+ const uint64_t mu = 0x9c3e466c172963d5; // (calc_lo(poly) << 1) | 1
+ const uint64_t k2 = 0xdabe95afc7875f40; // calc_hi(poly, 1)
+ const uint64_t k1 = 0xe05dd497ca393ae4; // calc_hi(poly, k2)
+ const __m128i vfold0 = _mm_set_epi64x(p, mu);
+ const __m128i vfold1 = _mm_set_epi64x(k2, k1);
+
+ // Create a vector with 8-bit values 0 to 15. This is used to
+ // construct control masks for _mm_blendv_epi8 and _mm_shuffle_epi8.
+ const __m128i vramp = _mm_setr_epi32(
+ 0x03020100, 0x07060504, 0x0b0a0908, 0x0f0e0d0c);
+
+ // This is used to inverse the control mask of _mm_shuffle_epi8
+ // so that bytes that wouldn't be picked with the original mask
+ // will be picked and vice versa.
+ const __m128i vsign = _mm_set1_epi8(0x80);
+
+ // Memory addresses A to D and the distances between them:
+ //
+ // A B C D
+ // [skip_start][size][skip_end]
+ // [ size2 ]
+ //
+ // A and D are 16-byte aligned. B and C are 1-byte aligned.
+ // skip_start and skip_end are 0-15 bytes. size is at least 1 byte.
+ //
+ // A = aligned_buf will initially point to this address.
+ // B = The address pointed by the caller-supplied buf.
+ // C = buf + size == aligned_buf + size2
+ // D = buf + size + skip_end == aligned_buf + size2 + skip_end
+ const size_t skip_start = (size_t)((uintptr_t)buf & 15);
+ const size_t skip_end = (size_t)((0U - (uintptr_t)(buf + size)) & 15);
+ const __m128i *aligned_buf = (const __m128i *)(
+ (uintptr_t)buf & ~(uintptr_t)15);
+
+ // If size2 <= 16 then the whole input fits into a single 16-byte
+ // vector. If size2 > 16 then at least two 16-byte vectors must
+ // be processed. If size2 > 16 && size <= 16 then there is only
+ // one 16-byte vector's worth of input but it is unaligned in memory.
+ //
+ // NOTE: There is no integer overflow here if the arguments are valid.
+ // If this overflowed, buf + size would too.
+ size_t size2 = skip_start + size;
+
+ // Masks to be used with _mm_blendv_epi8 and _mm_shuffle_epi8:
+ // The first skip_start or skip_end bytes in the vectors will have
+ // the high bit (0x80) set. _mm_blendv_epi8 and _mm_shuffle_epi8
+ // will produce zeros for these positions. (Bitwise-xor of these
+ // masks with vsign will produce the opposite behavior.)
+ const __m128i mask_start
+ = _mm_sub_epi8(vramp, _mm_set1_epi8(skip_start));
+ const __m128i mask_end = _mm_sub_epi8(vramp, _mm_set1_epi8(skip_end));
+
+ // Get the first 1-16 bytes into data0. If loading less than 16 bytes,
+ // the bytes are loaded to the high bits of the vector and the least
+ // significant positions are filled with zeros.
+ const __m128i data0 = _mm_blendv_epi8(_mm_load_si128(aligned_buf),
+ _mm_setzero_si128(), mask_start);
+ ++aligned_buf;
+
+#if defined(__i386__) || defined(_M_IX86)
+ const __m128i initial_crc = _mm_set_epi64x(0, ~crc);
+#else
+ // GCC and Clang would produce good code with _mm_set_epi64x
+ // but MSVC needs _mm_cvtsi64_si128 on x86-64.
+ const __m128i initial_crc = _mm_cvtsi64_si128(~crc);
+#endif
+
+ __m128i v0, v1, v2, v3;
+
+#ifndef CRC_USE_GENERIC_FOR_SMALL_INPUTS
+ if (size <= 16) {
+ // Right-shift initial_crc by 1-16 bytes based on "size"
+ // and store the result in v1 (high bytes) and v0 (low bytes).
+ //
+ // NOTE: The highest 8 bytes of initial_crc are zeros so
+ // v1 will be filled with zeros if size >= 8. The highest 8
+ // bytes of v1 will always become zeros.
+ //
+ // [ v1 ][ v0 ]
+ // [ initial_crc ] size == 1
+ // [ initial_crc ] size == 2
+ // [ initial_crc ] size == 15
+ // [ initial_crc ] size == 16 (all in v0)
+ const __m128i mask_low = _mm_add_epi8(
+ vramp, _mm_set1_epi8(size - 16));
+ MASK_LH(initial_crc, mask_low, v0, v1);
+
+ if (size2 <= 16) {
+ // There are 1-16 bytes of input and it is all
+ // in data0. Copy the input bytes to v3. If there
+ // are fewer than 16 bytes, the low bytes in v3
+ // will be filled with zeros. That is, the input
+ // bytes are stored to the same position as
+ // (part of) initial_crc is in v0.
+ MASK_L(data0, mask_end, v3);
+ } else {
+ // There are 2-16 bytes of input but not all bytes
+ // are in data0.
+ const __m128i data1 = _mm_load_si128(aligned_buf);
+
+ // Collect the 2-16 input bytes from data0 and data1
+ // to v2 and v3, and bitwise-xor them with the
+ // low bits of initial_crc in v0. Note that the
+ // the second xor is below this else-block as it
+ // is shared with the other branch.
+ MASK_H(data0, mask_end, v2);
+ MASK_L(data1, mask_end, v3);
+ v0 = _mm_xor_si128(v0, v2);
+ }
+
+ v0 = _mm_xor_si128(v0, v3);
+ v1 = _mm_alignr_epi8(v1, v0, 8);
+ } else
+#endif
+ {
+ const __m128i data1 = _mm_load_si128(aligned_buf);
+ MASK_LH(initial_crc, mask_start, v0, v1);
+ v0 = _mm_xor_si128(v0, data0);
+ v1 = _mm_xor_si128(v1, data1);
+
+#define FOLD \
+ v1 = _mm_xor_si128(v1, _mm_clmulepi64_si128(v0, vfold1, 0x00)); \
+ v0 = _mm_xor_si128(v1, _mm_clmulepi64_si128(v0, vfold1, 0x11));
+
+ while (size2 > 32) {
+ ++aligned_buf;
+ size2 -= 16;
+ FOLD
+ v1 = _mm_load_si128(aligned_buf);
+ }
+
+ if (size2 < 32) {
+ MASK_H(v0, mask_end, v2);
+ MASK_L(v0, mask_end, v0);
+ MASK_L(v1, mask_end, v3);
+ v1 = _mm_or_si128(v2, v3);
+ }
+
+ FOLD
+ v1 = _mm_srli_si128(v0, 8);
+#undef FOLD
+ }
+
+ v1 = _mm_xor_si128(_mm_clmulepi64_si128(v0, vfold1, 0x10), v1);
+ v0 = _mm_clmulepi64_si128(v1, vfold0, 0x00);
+ v2 = _mm_clmulepi64_si128(v0, vfold0, 0x10);
+ v0 = _mm_xor_si128(_mm_xor_si128(v2, _mm_slli_si128(v0, 8)), v1);
+
+#if defined(__i386__) || defined(_M_IX86)
+ return ~(((uint64_t)(uint32_t)_mm_extract_epi32(v0, 3) << 32) |
+ (uint64_t)(uint32_t)_mm_extract_epi32(v0, 2));
+#else
+ return ~(uint64_t)_mm_extract_epi64(v0, 1);
+#endif
+
+#if TUKLIB_GNUC_REQ(4, 6) || defined(__clang__)
+# pragma GCC diagnostic pop
+#endif
+}
+#if defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__) \
+ && defined(_M_IX86)
+# pragma optimize("", on)
+#endif
+#endif
+
+
+////////////////////////
+// Detect CPU support //
+////////////////////////
+
+#if defined(CRC_GENERIC) && defined(CRC_CLMUL)
+static inline bool
+is_clmul_supported(void)
+{
+ int success = 1;
+ uint32_t r[4]; // eax, ebx, ecx, edx
+
+#if defined(_MSC_VER)
+ // This needs <intrin.h> with MSVC. ICC has it as a built-in
+ // on all platforms.
+ __cpuid(r, 1);
+#elif defined(HAVE_CPUID_H)
+ // Compared to just using __asm__ to run CPUID, this also checks
+ // that CPUID is supported and saves and restores ebx as that is
+ // needed with GCC < 5 with position-independent code (PIC).
+ success = __get_cpuid(1, &r[0], &r[1], &r[2], &r[3]);
+#else
+ // Just a fallback that shouldn't be needed.
+ __asm__("cpuid\n\t"
+ : "=a"(r[0]), "=b"(r[1]), "=c"(r[2]), "=d"(r[3])
+ : "a"(1), "c"(0));
+#endif
+
+ // Returns true if these are supported:
+ // CLMUL (bit 1 in ecx)
+ // SSSE3 (bit 9 in ecx)
+ // SSE4.1 (bit 19 in ecx)
+ const uint32_t ecx_mask = (1 << 1) | (1 << 9) | (1 << 19);
+ return success && (r[2] & ecx_mask) == ecx_mask;
+
+ // Alternative methods that weren't used:
+ // - ICC's _may_i_use_cpu_feature: the other methods should work too.
+ // - GCC >= 6 / Clang / ICX __builtin_cpu_supports("pclmul")
+ //
+ // CPUID decding is needed with MSVC anyway and older GCC. This keeps
+ // the feature checks in the build system simpler too. The nice thing
+ // about __builtin_cpu_supports would be that it generates very short
+ // code as is it only reads a variable set at startup but a few bytes
+ // doesn't matter here.
+}
+
+
+#ifdef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+# define CRC64_FUNC_INIT
+# define CRC64_SET_FUNC_ATTR __attribute__((__constructor__))
+#else
+# define CRC64_FUNC_INIT = &crc64_dispatch
+# define CRC64_SET_FUNC_ATTR
+static uint64_t crc64_dispatch(const uint8_t *buf, size_t size, uint64_t crc);
+#endif
+
+
+// Pointer to the the selected CRC64 method.
+static uint64_t (*crc64_func)(const uint8_t *buf, size_t size, uint64_t crc)
+ CRC64_FUNC_INIT;
+
+
+CRC64_SET_FUNC_ATTR
+static void
+crc64_set_func(void)
+{
+ crc64_func = is_clmul_supported() ? &crc64_clmul : &crc64_generic;
+ return;
+}
+
+
+#ifndef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+static uint64_t
+crc64_dispatch(const uint8_t *buf, size_t size, uint64_t crc)
+{
+ // When __attribute__((__constructor__)) isn't supported, set the
+ // function pointer without any locking. If multiple threads run
+ // the detection code in parallel, they will all end up setting
+ // the pointer to the same value. This avoids the use of
+ // mythread_once() on every call to lzma_crc64() but this likely
+ // isn't strictly standards compliant. Let's change it if it breaks.
+ crc64_set_func();
+ return crc64_func(buf, size, crc);
+}
+#endif
+#endif
+
+
+extern LZMA_API(uint64_t)
+lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc)
+{
+#if defined(CRC_GENERIC) && defined(CRC_CLMUL)
+ // If CLMUL is available, it is the best for non-tiny inputs,
+ // being over twice as fast as the generic slice-by-four version.
+ // However, for size <= 16 it's different. In the extreme case
+ // of size == 1 the generic version can be five times faster.
+ // At size >= 8 the CLMUL starts to become reasonable. It
+ // varies depending on the alignment of buf too.
+ //
+ // The above doesn't include the overhead of mythread_once().
+ // At least on x86-64 GNU/Linux, pthread_once() is very fast but
+ // it still makes lzma_crc64(buf, 1, crc) 50-100 % slower. When
+ // size reaches 12-16 bytes the overhead becomes negligible.
+ //
+ // So using the generic version for size <= 16 may give better
+ // performance with tiny inputs but if such inputs happen rarely
+ // it's not so obvious because then the lookup table of the
+ // generic version may not be in the processor cache.
+#ifdef CRC_USE_GENERIC_FOR_SMALL_INPUTS
+ if (size <= 16)
+ return crc64_generic(buf, size, crc);
+#endif
+
+/*
+#ifndef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+ // See crc64_dispatch(). This would be the alternative which uses
+ // locking and doesn't use crc64_dispatch(). Note that on Windows
+ // this method needs Vista threads.
+ mythread_once(crc64_set_func);
+#endif
+*/
+
+ return crc64_func(buf, size, crc);
+
+#elif defined(CRC_CLMUL)
+ // If CLMUL is used unconditionally without runtime CPU detection
+ // then omitting the generic version and its 8 KiB lookup table
+ // makes the library smaller.
+ //
+ // FIXME: Lookup table isn't currently omitted on 32-bit x86,
+ // see crc64_table.c.
+ return crc64_clmul(buf, size, crc);
+
+#else
+ return crc64_generic(buf, size, crc);
+#endif
+}
diff --git a/src/liblzma/check/crc64_small.c b/src/liblzma/check/crc64_small.c
new file mode 100644
index 0000000..420f7cf
--- /dev/null
+++ b/src/liblzma/check/crc64_small.c
@@ -0,0 +1,58 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc64_small.c
+/// \brief CRC64 calculation (size-optimized)
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+
+static uint64_t crc64_table[256];
+
+
+#ifdef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+__attribute__((__constructor__))
+#endif
+static void
+crc64_init(void)
+{
+ static const uint64_t poly64 = UINT64_C(0xC96C5795D7870F42);
+
+ for (size_t b = 0; b < 256; ++b) {
+ uint64_t r = b;
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly64;
+ else
+ r >>= 1;
+ }
+
+ crc64_table[b] = r;
+ }
+
+ return;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc)
+{
+#ifndef HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR
+ mythread_once(crc64_init);
+#endif
+
+ crc = ~crc;
+
+ while (size != 0) {
+ crc = crc64_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
+ --size;
+ }
+
+ return ~crc;
+}
diff --git a/src/liblzma/check/crc64_table.c b/src/liblzma/check/crc64_table.c
new file mode 100644
index 0000000..688e527
--- /dev/null
+++ b/src/liblzma/check/crc64_table.c
@@ -0,0 +1,33 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc64_table.c
+/// \brief Precalculated CRC64 table with correct endianness
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+// FIXME: Compared to crc64_fast.c this has to check for __x86_64__ too
+// so that in 32-bit builds crc64_x86.S won't break due to a missing table.
+#if (defined(__x86_64__) && defined(__SSSE3__) \
+ && defined(__SSE4_1__) && defined(__PCLMUL__)) \
+ || (defined(__e2k__) && __iset__ >= 6)
+// No table needed. Use a typedef to avoid an empty translation unit.
+typedef void lzma_crc64_dummy;
+
+#else
+// Having the declaration here silences clang -Wmissing-variable-declarations.
+extern const uint64_t lzma_crc64_table[4][256];
+
+# if defined(WORDS_BIGENDIAN)
+# include "crc64_table_be.h"
+# else
+# include "crc64_table_le.h"
+# endif
+#endif
diff --git a/src/liblzma/check/crc64_table_be.h b/src/liblzma/check/crc64_table_be.h
new file mode 100644
index 0000000..ea074f3
--- /dev/null
+++ b/src/liblzma/check/crc64_table_be.h
@@ -0,0 +1,521 @@
+/* This file has been automatically generated by crc64_tablegen.c. */
+
+const uint64_t lzma_crc64_table[4][256] = {
+ {
+ UINT64_C(0x0000000000000000), UINT64_C(0x6F5FA703BE4C2EB3),
+ UINT64_C(0x5BA040A8573684F4), UINT64_C(0x34FFE7ABE97AAA47),
+ UINT64_C(0x335E8FFF84C3D07B), UINT64_C(0x5C0128FC3A8FFEC8),
+ UINT64_C(0x68FECF57D3F5548F), UINT64_C(0x07A168546DB97A3C),
+ UINT64_C(0x66BC1EFF0987A1F7), UINT64_C(0x09E3B9FCB7CB8F44),
+ UINT64_C(0x3D1C5E575EB12503), UINT64_C(0x5243F954E0FD0BB0),
+ UINT64_C(0x55E291008D44718C), UINT64_C(0x3ABD360333085F3F),
+ UINT64_C(0x0E42D1A8DA72F578), UINT64_C(0x611D76AB643EDBCB),
+ UINT64_C(0x4966335138A19B7D), UINT64_C(0x2639945286EDB5CE),
+ UINT64_C(0x12C673F96F971F89), UINT64_C(0x7D99D4FAD1DB313A),
+ UINT64_C(0x7A38BCAEBC624B06), UINT64_C(0x15671BAD022E65B5),
+ UINT64_C(0x2198FC06EB54CFF2), UINT64_C(0x4EC75B055518E141),
+ UINT64_C(0x2FDA2DAE31263A8A), UINT64_C(0x40858AAD8F6A1439),
+ UINT64_C(0x747A6D066610BE7E), UINT64_C(0x1B25CA05D85C90CD),
+ UINT64_C(0x1C84A251B5E5EAF1), UINT64_C(0x73DB05520BA9C442),
+ UINT64_C(0x4724E2F9E2D36E05), UINT64_C(0x287B45FA5C9F40B6),
+ UINT64_C(0x92CC66A2704237FB), UINT64_C(0xFD93C1A1CE0E1948),
+ UINT64_C(0xC96C260A2774B30F), UINT64_C(0xA633810999389DBC),
+ UINT64_C(0xA192E95DF481E780), UINT64_C(0xCECD4E5E4ACDC933),
+ UINT64_C(0xFA32A9F5A3B76374), UINT64_C(0x956D0EF61DFB4DC7),
+ UINT64_C(0xF470785D79C5960C), UINT64_C(0x9B2FDF5EC789B8BF),
+ UINT64_C(0xAFD038F52EF312F8), UINT64_C(0xC08F9FF690BF3C4B),
+ UINT64_C(0xC72EF7A2FD064677), UINT64_C(0xA87150A1434A68C4),
+ UINT64_C(0x9C8EB70AAA30C283), UINT64_C(0xF3D11009147CEC30),
+ UINT64_C(0xDBAA55F348E3AC86), UINT64_C(0xB4F5F2F0F6AF8235),
+ UINT64_C(0x800A155B1FD52872), UINT64_C(0xEF55B258A19906C1),
+ UINT64_C(0xE8F4DA0CCC207CFD), UINT64_C(0x87AB7D0F726C524E),
+ UINT64_C(0xB3549AA49B16F809), UINT64_C(0xDC0B3DA7255AD6BA),
+ UINT64_C(0xBD164B0C41640D71), UINT64_C(0xD249EC0FFF2823C2),
+ UINT64_C(0xE6B60BA416528985), UINT64_C(0x89E9ACA7A81EA736),
+ UINT64_C(0x8E48C4F3C5A7DD0A), UINT64_C(0xE11763F07BEBF3B9),
+ UINT64_C(0xD5E8845B929159FE), UINT64_C(0xBAB723582CDD774D),
+ UINT64_C(0xA187C3EBCA2BB664), UINT64_C(0xCED864E8746798D7),
+ UINT64_C(0xFA2783439D1D3290), UINT64_C(0x9578244023511C23),
+ UINT64_C(0x92D94C144EE8661F), UINT64_C(0xFD86EB17F0A448AC),
+ UINT64_C(0xC9790CBC19DEE2EB), UINT64_C(0xA626ABBFA792CC58),
+ UINT64_C(0xC73BDD14C3AC1793), UINT64_C(0xA8647A177DE03920),
+ UINT64_C(0x9C9B9DBC949A9367), UINT64_C(0xF3C43ABF2AD6BDD4),
+ UINT64_C(0xF46552EB476FC7E8), UINT64_C(0x9B3AF5E8F923E95B),
+ UINT64_C(0xAFC512431059431C), UINT64_C(0xC09AB540AE156DAF),
+ UINT64_C(0xE8E1F0BAF28A2D19), UINT64_C(0x87BE57B94CC603AA),
+ UINT64_C(0xB341B012A5BCA9ED), UINT64_C(0xDC1E17111BF0875E),
+ UINT64_C(0xDBBF7F457649FD62), UINT64_C(0xB4E0D846C805D3D1),
+ UINT64_C(0x801F3FED217F7996), UINT64_C(0xEF4098EE9F335725),
+ UINT64_C(0x8E5DEE45FB0D8CEE), UINT64_C(0xE10249464541A25D),
+ UINT64_C(0xD5FDAEEDAC3B081A), UINT64_C(0xBAA209EE127726A9),
+ UINT64_C(0xBD0361BA7FCE5C95), UINT64_C(0xD25CC6B9C1827226),
+ UINT64_C(0xE6A3211228F8D861), UINT64_C(0x89FC861196B4F6D2),
+ UINT64_C(0x334BA549BA69819F), UINT64_C(0x5C14024A0425AF2C),
+ UINT64_C(0x68EBE5E1ED5F056B), UINT64_C(0x07B442E253132BD8),
+ UINT64_C(0x00152AB63EAA51E4), UINT64_C(0x6F4A8DB580E67F57),
+ UINT64_C(0x5BB56A1E699CD510), UINT64_C(0x34EACD1DD7D0FBA3),
+ UINT64_C(0x55F7BBB6B3EE2068), UINT64_C(0x3AA81CB50DA20EDB),
+ UINT64_C(0x0E57FB1EE4D8A49C), UINT64_C(0x61085C1D5A948A2F),
+ UINT64_C(0x66A93449372DF013), UINT64_C(0x09F6934A8961DEA0),
+ UINT64_C(0x3D0974E1601B74E7), UINT64_C(0x5256D3E2DE575A54),
+ UINT64_C(0x7A2D961882C81AE2), UINT64_C(0x1572311B3C843451),
+ UINT64_C(0x218DD6B0D5FE9E16), UINT64_C(0x4ED271B36BB2B0A5),
+ UINT64_C(0x497319E7060BCA99), UINT64_C(0x262CBEE4B847E42A),
+ UINT64_C(0x12D3594F513D4E6D), UINT64_C(0x7D8CFE4CEF7160DE),
+ UINT64_C(0x1C9188E78B4FBB15), UINT64_C(0x73CE2FE4350395A6),
+ UINT64_C(0x4731C84FDC793FE1), UINT64_C(0x286E6F4C62351152),
+ UINT64_C(0x2FCF07180F8C6B6E), UINT64_C(0x4090A01BB1C045DD),
+ UINT64_C(0x746F47B058BAEF9A), UINT64_C(0x1B30E0B3E6F6C129),
+ UINT64_C(0x420F87D795576CC9), UINT64_C(0x2D5020D42B1B427A),
+ UINT64_C(0x19AFC77FC261E83D), UINT64_C(0x76F0607C7C2DC68E),
+ UINT64_C(0x715108281194BCB2), UINT64_C(0x1E0EAF2BAFD89201),
+ UINT64_C(0x2AF1488046A23846), UINT64_C(0x45AEEF83F8EE16F5),
+ UINT64_C(0x24B399289CD0CD3E), UINT64_C(0x4BEC3E2B229CE38D),
+ UINT64_C(0x7F13D980CBE649CA), UINT64_C(0x104C7E8375AA6779),
+ UINT64_C(0x17ED16D718131D45), UINT64_C(0x78B2B1D4A65F33F6),
+ UINT64_C(0x4C4D567F4F2599B1), UINT64_C(0x2312F17CF169B702),
+ UINT64_C(0x0B69B486ADF6F7B4), UINT64_C(0x6436138513BAD907),
+ UINT64_C(0x50C9F42EFAC07340), UINT64_C(0x3F96532D448C5DF3),
+ UINT64_C(0x38373B79293527CF), UINT64_C(0x57689C7A9779097C),
+ UINT64_C(0x63977BD17E03A33B), UINT64_C(0x0CC8DCD2C04F8D88),
+ UINT64_C(0x6DD5AA79A4715643), UINT64_C(0x028A0D7A1A3D78F0),
+ UINT64_C(0x3675EAD1F347D2B7), UINT64_C(0x592A4DD24D0BFC04),
+ UINT64_C(0x5E8B258620B28638), UINT64_C(0x31D482859EFEA88B),
+ UINT64_C(0x052B652E778402CC), UINT64_C(0x6A74C22DC9C82C7F),
+ UINT64_C(0xD0C3E175E5155B32), UINT64_C(0xBF9C46765B597581),
+ UINT64_C(0x8B63A1DDB223DFC6), UINT64_C(0xE43C06DE0C6FF175),
+ UINT64_C(0xE39D6E8A61D68B49), UINT64_C(0x8CC2C989DF9AA5FA),
+ UINT64_C(0xB83D2E2236E00FBD), UINT64_C(0xD762892188AC210E),
+ UINT64_C(0xB67FFF8AEC92FAC5), UINT64_C(0xD920588952DED476),
+ UINT64_C(0xEDDFBF22BBA47E31), UINT64_C(0x8280182105E85082),
+ UINT64_C(0x8521707568512ABE), UINT64_C(0xEA7ED776D61D040D),
+ UINT64_C(0xDE8130DD3F67AE4A), UINT64_C(0xB1DE97DE812B80F9),
+ UINT64_C(0x99A5D224DDB4C04F), UINT64_C(0xF6FA752763F8EEFC),
+ UINT64_C(0xC205928C8A8244BB), UINT64_C(0xAD5A358F34CE6A08),
+ UINT64_C(0xAAFB5DDB59771034), UINT64_C(0xC5A4FAD8E73B3E87),
+ UINT64_C(0xF15B1D730E4194C0), UINT64_C(0x9E04BA70B00DBA73),
+ UINT64_C(0xFF19CCDBD43361B8), UINT64_C(0x90466BD86A7F4F0B),
+ UINT64_C(0xA4B98C738305E54C), UINT64_C(0xCBE62B703D49CBFF),
+ UINT64_C(0xCC47432450F0B1C3), UINT64_C(0xA318E427EEBC9F70),
+ UINT64_C(0x97E7038C07C63537), UINT64_C(0xF8B8A48FB98A1B84),
+ UINT64_C(0xE388443C5F7CDAAD), UINT64_C(0x8CD7E33FE130F41E),
+ UINT64_C(0xB8280494084A5E59), UINT64_C(0xD777A397B60670EA),
+ UINT64_C(0xD0D6CBC3DBBF0AD6), UINT64_C(0xBF896CC065F32465),
+ UINT64_C(0x8B768B6B8C898E22), UINT64_C(0xE4292C6832C5A091),
+ UINT64_C(0x85345AC356FB7B5A), UINT64_C(0xEA6BFDC0E8B755E9),
+ UINT64_C(0xDE941A6B01CDFFAE), UINT64_C(0xB1CBBD68BF81D11D),
+ UINT64_C(0xB66AD53CD238AB21), UINT64_C(0xD935723F6C748592),
+ UINT64_C(0xEDCA9594850E2FD5), UINT64_C(0x829532973B420166),
+ UINT64_C(0xAAEE776D67DD41D0), UINT64_C(0xC5B1D06ED9916F63),
+ UINT64_C(0xF14E37C530EBC524), UINT64_C(0x9E1190C68EA7EB97),
+ UINT64_C(0x99B0F892E31E91AB), UINT64_C(0xF6EF5F915D52BF18),
+ UINT64_C(0xC210B83AB428155F), UINT64_C(0xAD4F1F390A643BEC),
+ UINT64_C(0xCC5269926E5AE027), UINT64_C(0xA30DCE91D016CE94),
+ UINT64_C(0x97F2293A396C64D3), UINT64_C(0xF8AD8E3987204A60),
+ UINT64_C(0xFF0CE66DEA99305C), UINT64_C(0x9053416E54D51EEF),
+ UINT64_C(0xA4ACA6C5BDAFB4A8), UINT64_C(0xCBF301C603E39A1B),
+ UINT64_C(0x7144229E2F3EED56), UINT64_C(0x1E1B859D9172C3E5),
+ UINT64_C(0x2AE46236780869A2), UINT64_C(0x45BBC535C6444711),
+ UINT64_C(0x421AAD61ABFD3D2D), UINT64_C(0x2D450A6215B1139E),
+ UINT64_C(0x19BAEDC9FCCBB9D9), UINT64_C(0x76E54ACA4287976A),
+ UINT64_C(0x17F83C6126B94CA1), UINT64_C(0x78A79B6298F56212),
+ UINT64_C(0x4C587CC9718FC855), UINT64_C(0x2307DBCACFC3E6E6),
+ UINT64_C(0x24A6B39EA27A9CDA), UINT64_C(0x4BF9149D1C36B269),
+ UINT64_C(0x7F06F336F54C182E), UINT64_C(0x105954354B00369D),
+ UINT64_C(0x382211CF179F762B), UINT64_C(0x577DB6CCA9D35898),
+ UINT64_C(0x6382516740A9F2DF), UINT64_C(0x0CDDF664FEE5DC6C),
+ UINT64_C(0x0B7C9E30935CA650), UINT64_C(0x642339332D1088E3),
+ UINT64_C(0x50DCDE98C46A22A4), UINT64_C(0x3F83799B7A260C17),
+ UINT64_C(0x5E9E0F301E18D7DC), UINT64_C(0x31C1A833A054F96F),
+ UINT64_C(0x053E4F98492E5328), UINT64_C(0x6A61E89BF7627D9B),
+ UINT64_C(0x6DC080CF9ADB07A7), UINT64_C(0x029F27CC24972914),
+ UINT64_C(0x3660C067CDED8353), UINT64_C(0x593F676473A1ADE0)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0x0DF1D05C9279E954),
+ UINT64_C(0x1AE2A1B924F3D2A9), UINT64_C(0x171371E5B68A3BFD),
+ UINT64_C(0xB1DA4DDC62497DC1), UINT64_C(0xBC2B9D80F0309495),
+ UINT64_C(0xAB38EC6546BAAF68), UINT64_C(0xA6C93C39D4C3463C),
+ UINT64_C(0xE7AB9517EE3D2210), UINT64_C(0xEA5A454B7C44CB44),
+ UINT64_C(0xFD4934AECACEF0B9), UINT64_C(0xF0B8E4F258B719ED),
+ UINT64_C(0x5671D8CB8C745FD1), UINT64_C(0x5B8008971E0DB685),
+ UINT64_C(0x4C937972A8878D78), UINT64_C(0x4162A92E3AFE642C),
+ UINT64_C(0xCE572B2FDC7B4420), UINT64_C(0xC3A6FB734E02AD74),
+ UINT64_C(0xD4B58A96F8889689), UINT64_C(0xD9445ACA6AF17FDD),
+ UINT64_C(0x7F8D66F3BE3239E1), UINT64_C(0x727CB6AF2C4BD0B5),
+ UINT64_C(0x656FC74A9AC1EB48), UINT64_C(0x689E171608B8021C),
+ UINT64_C(0x29FCBE3832466630), UINT64_C(0x240D6E64A03F8F64),
+ UINT64_C(0x331E1F8116B5B499), UINT64_C(0x3EEFCFDD84CC5DCD),
+ UINT64_C(0x9826F3E4500F1BF1), UINT64_C(0x95D723B8C276F2A5),
+ UINT64_C(0x82C4525D74FCC958), UINT64_C(0x8F358201E685200C),
+ UINT64_C(0x9CAF565EB8F78840), UINT64_C(0x915E86022A8E6114),
+ UINT64_C(0x864DF7E79C045AE9), UINT64_C(0x8BBC27BB0E7DB3BD),
+ UINT64_C(0x2D751B82DABEF581), UINT64_C(0x2084CBDE48C71CD5),
+ UINT64_C(0x3797BA3BFE4D2728), UINT64_C(0x3A666A676C34CE7C),
+ UINT64_C(0x7B04C34956CAAA50), UINT64_C(0x76F51315C4B34304),
+ UINT64_C(0x61E662F0723978F9), UINT64_C(0x6C17B2ACE04091AD),
+ UINT64_C(0xCADE8E953483D791), UINT64_C(0xC72F5EC9A6FA3EC5),
+ UINT64_C(0xD03C2F2C10700538), UINT64_C(0xDDCDFF708209EC6C),
+ UINT64_C(0x52F87D71648CCC60), UINT64_C(0x5F09AD2DF6F52534),
+ UINT64_C(0x481ADCC8407F1EC9), UINT64_C(0x45EB0C94D206F79D),
+ UINT64_C(0xE32230AD06C5B1A1), UINT64_C(0xEED3E0F194BC58F5),
+ UINT64_C(0xF9C0911422366308), UINT64_C(0xF4314148B04F8A5C),
+ UINT64_C(0xB553E8668AB1EE70), UINT64_C(0xB8A2383A18C80724),
+ UINT64_C(0xAFB149DFAE423CD9), UINT64_C(0xA24099833C3BD58D),
+ UINT64_C(0x0489A5BAE8F893B1), UINT64_C(0x097875E67A817AE5),
+ UINT64_C(0x1E6B0403CC0B4118), UINT64_C(0x139AD45F5E72A84C),
+ UINT64_C(0x385FADBC70EF1181), UINT64_C(0x35AE7DE0E296F8D5),
+ UINT64_C(0x22BD0C05541CC328), UINT64_C(0x2F4CDC59C6652A7C),
+ UINT64_C(0x8985E06012A66C40), UINT64_C(0x8474303C80DF8514),
+ UINT64_C(0x936741D93655BEE9), UINT64_C(0x9E969185A42C57BD),
+ UINT64_C(0xDFF438AB9ED23391), UINT64_C(0xD205E8F70CABDAC5),
+ UINT64_C(0xC5169912BA21E138), UINT64_C(0xC8E7494E2858086C),
+ UINT64_C(0x6E2E7577FC9B4E50), UINT64_C(0x63DFA52B6EE2A704),
+ UINT64_C(0x74CCD4CED8689CF9), UINT64_C(0x793D04924A1175AD),
+ UINT64_C(0xF6088693AC9455A1), UINT64_C(0xFBF956CF3EEDBCF5),
+ UINT64_C(0xECEA272A88678708), UINT64_C(0xE11BF7761A1E6E5C),
+ UINT64_C(0x47D2CB4FCEDD2860), UINT64_C(0x4A231B135CA4C134),
+ UINT64_C(0x5D306AF6EA2EFAC9), UINT64_C(0x50C1BAAA7857139D),
+ UINT64_C(0x11A3138442A977B1), UINT64_C(0x1C52C3D8D0D09EE5),
+ UINT64_C(0x0B41B23D665AA518), UINT64_C(0x06B06261F4234C4C),
+ UINT64_C(0xA0795E5820E00A70), UINT64_C(0xAD888E04B299E324),
+ UINT64_C(0xBA9BFFE10413D8D9), UINT64_C(0xB76A2FBD966A318D),
+ UINT64_C(0xA4F0FBE2C81899C1), UINT64_C(0xA9012BBE5A617095),
+ UINT64_C(0xBE125A5BECEB4B68), UINT64_C(0xB3E38A077E92A23C),
+ UINT64_C(0x152AB63EAA51E400), UINT64_C(0x18DB666238280D54),
+ UINT64_C(0x0FC817878EA236A9), UINT64_C(0x0239C7DB1CDBDFFD),
+ UINT64_C(0x435B6EF52625BBD1), UINT64_C(0x4EAABEA9B45C5285),
+ UINT64_C(0x59B9CF4C02D66978), UINT64_C(0x54481F1090AF802C),
+ UINT64_C(0xF2812329446CC610), UINT64_C(0xFF70F375D6152F44),
+ UINT64_C(0xE8638290609F14B9), UINT64_C(0xE59252CCF2E6FDED),
+ UINT64_C(0x6AA7D0CD1463DDE1), UINT64_C(0x67560091861A34B5),
+ UINT64_C(0x7045717430900F48), UINT64_C(0x7DB4A128A2E9E61C),
+ UINT64_C(0xDB7D9D11762AA020), UINT64_C(0xD68C4D4DE4534974),
+ UINT64_C(0xC19F3CA852D97289), UINT64_C(0xCC6EECF4C0A09BDD),
+ UINT64_C(0x8D0C45DAFA5EFFF1), UINT64_C(0x80FD9586682716A5),
+ UINT64_C(0x97EEE463DEAD2D58), UINT64_C(0x9A1F343F4CD4C40C),
+ UINT64_C(0x3CD6080698178230), UINT64_C(0x3127D85A0A6E6B64),
+ UINT64_C(0x2634A9BFBCE45099), UINT64_C(0x2BC579E32E9DB9CD),
+ UINT64_C(0xF5A054D6CA71FB90), UINT64_C(0xF851848A580812C4),
+ UINT64_C(0xEF42F56FEE822939), UINT64_C(0xE2B325337CFBC06D),
+ UINT64_C(0x447A190AA8388651), UINT64_C(0x498BC9563A416F05),
+ UINT64_C(0x5E98B8B38CCB54F8), UINT64_C(0x536968EF1EB2BDAC),
+ UINT64_C(0x120BC1C1244CD980), UINT64_C(0x1FFA119DB63530D4),
+ UINT64_C(0x08E9607800BF0B29), UINT64_C(0x0518B02492C6E27D),
+ UINT64_C(0xA3D18C1D4605A441), UINT64_C(0xAE205C41D47C4D15),
+ UINT64_C(0xB9332DA462F676E8), UINT64_C(0xB4C2FDF8F08F9FBC),
+ UINT64_C(0x3BF77FF9160ABFB0), UINT64_C(0x3606AFA5847356E4),
+ UINT64_C(0x2115DE4032F96D19), UINT64_C(0x2CE40E1CA080844D),
+ UINT64_C(0x8A2D32257443C271), UINT64_C(0x87DCE279E63A2B25),
+ UINT64_C(0x90CF939C50B010D8), UINT64_C(0x9D3E43C0C2C9F98C),
+ UINT64_C(0xDC5CEAEEF8379DA0), UINT64_C(0xD1AD3AB26A4E74F4),
+ UINT64_C(0xC6BE4B57DCC44F09), UINT64_C(0xCB4F9B0B4EBDA65D),
+ UINT64_C(0x6D86A7329A7EE061), UINT64_C(0x6077776E08070935),
+ UINT64_C(0x7764068BBE8D32C8), UINT64_C(0x7A95D6D72CF4DB9C),
+ UINT64_C(0x690F0288728673D0), UINT64_C(0x64FED2D4E0FF9A84),
+ UINT64_C(0x73EDA3315675A179), UINT64_C(0x7E1C736DC40C482D),
+ UINT64_C(0xD8D54F5410CF0E11), UINT64_C(0xD5249F0882B6E745),
+ UINT64_C(0xC237EEED343CDCB8), UINT64_C(0xCFC63EB1A64535EC),
+ UINT64_C(0x8EA4979F9CBB51C0), UINT64_C(0x835547C30EC2B894),
+ UINT64_C(0x94463626B8488369), UINT64_C(0x99B7E67A2A316A3D),
+ UINT64_C(0x3F7EDA43FEF22C01), UINT64_C(0x328F0A1F6C8BC555),
+ UINT64_C(0x259C7BFADA01FEA8), UINT64_C(0x286DABA6487817FC),
+ UINT64_C(0xA75829A7AEFD37F0), UINT64_C(0xAAA9F9FB3C84DEA4),
+ UINT64_C(0xBDBA881E8A0EE559), UINT64_C(0xB04B584218770C0D),
+ UINT64_C(0x1682647BCCB44A31), UINT64_C(0x1B73B4275ECDA365),
+ UINT64_C(0x0C60C5C2E8479898), UINT64_C(0x0191159E7A3E71CC),
+ UINT64_C(0x40F3BCB040C015E0), UINT64_C(0x4D026CECD2B9FCB4),
+ UINT64_C(0x5A111D096433C749), UINT64_C(0x57E0CD55F64A2E1D),
+ UINT64_C(0xF129F16C22896821), UINT64_C(0xFCD82130B0F08175),
+ UINT64_C(0xEBCB50D5067ABA88), UINT64_C(0xE63A8089940353DC),
+ UINT64_C(0xCDFFF96ABA9EEA11), UINT64_C(0xC00E293628E70345),
+ UINT64_C(0xD71D58D39E6D38B8), UINT64_C(0xDAEC888F0C14D1EC),
+ UINT64_C(0x7C25B4B6D8D797D0), UINT64_C(0x71D464EA4AAE7E84),
+ UINT64_C(0x66C7150FFC244579), UINT64_C(0x6B36C5536E5DAC2D),
+ UINT64_C(0x2A546C7D54A3C801), UINT64_C(0x27A5BC21C6DA2155),
+ UINT64_C(0x30B6CDC470501AA8), UINT64_C(0x3D471D98E229F3FC),
+ UINT64_C(0x9B8E21A136EAB5C0), UINT64_C(0x967FF1FDA4935C94),
+ UINT64_C(0x816C801812196769), UINT64_C(0x8C9D504480608E3D),
+ UINT64_C(0x03A8D24566E5AE31), UINT64_C(0x0E590219F49C4765),
+ UINT64_C(0x194A73FC42167C98), UINT64_C(0x14BBA3A0D06F95CC),
+ UINT64_C(0xB2729F9904ACD3F0), UINT64_C(0xBF834FC596D53AA4),
+ UINT64_C(0xA8903E20205F0159), UINT64_C(0xA561EE7CB226E80D),
+ UINT64_C(0xE403475288D88C21), UINT64_C(0xE9F2970E1AA16575),
+ UINT64_C(0xFEE1E6EBAC2B5E88), UINT64_C(0xF31036B73E52B7DC),
+ UINT64_C(0x55D90A8EEA91F1E0), UINT64_C(0x5828DAD278E818B4),
+ UINT64_C(0x4F3BAB37CE622349), UINT64_C(0x42CA7B6B5C1BCA1D),
+ UINT64_C(0x5150AF3402696251), UINT64_C(0x5CA17F6890108B05),
+ UINT64_C(0x4BB20E8D269AB0F8), UINT64_C(0x4643DED1B4E359AC),
+ UINT64_C(0xE08AE2E860201F90), UINT64_C(0xED7B32B4F259F6C4),
+ UINT64_C(0xFA68435144D3CD39), UINT64_C(0xF799930DD6AA246D),
+ UINT64_C(0xB6FB3A23EC544041), UINT64_C(0xBB0AEA7F7E2DA915),
+ UINT64_C(0xAC199B9AC8A792E8), UINT64_C(0xA1E84BC65ADE7BBC),
+ UINT64_C(0x072177FF8E1D3D80), UINT64_C(0x0AD0A7A31C64D4D4),
+ UINT64_C(0x1DC3D646AAEEEF29), UINT64_C(0x1032061A3897067D),
+ UINT64_C(0x9F07841BDE122671), UINT64_C(0x92F654474C6BCF25),
+ UINT64_C(0x85E525A2FAE1F4D8), UINT64_C(0x8814F5FE68981D8C),
+ UINT64_C(0x2EDDC9C7BC5B5BB0), UINT64_C(0x232C199B2E22B2E4),
+ UINT64_C(0x343F687E98A88919), UINT64_C(0x39CEB8220AD1604D),
+ UINT64_C(0x78AC110C302F0461), UINT64_C(0x755DC150A256ED35),
+ UINT64_C(0x624EB0B514DCD6C8), UINT64_C(0x6FBF60E986A53F9C),
+ UINT64_C(0xC9765CD0526679A0), UINT64_C(0xC4878C8CC01F90F4),
+ UINT64_C(0xD394FD697695AB09), UINT64_C(0xDE652D35E4EC425D)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0xCB6D6A914AE10B3F),
+ UINT64_C(0x96DBD42295C2177E), UINT64_C(0x5DB6BEB3DF231C41),
+ UINT64_C(0x2CB7A9452A852FFC), UINT64_C(0xE7DAC3D4606424C3),
+ UINT64_C(0xBA6C7D67BF473882), UINT64_C(0x710117F6F5A633BD),
+ UINT64_C(0xDD705D247FA5876A), UINT64_C(0x161D37B535448C55),
+ UINT64_C(0x4BAB8906EA679014), UINT64_C(0x80C6E397A0869B2B),
+ UINT64_C(0xF1C7F4615520A896), UINT64_C(0x3AAA9EF01FC1A3A9),
+ UINT64_C(0x671C2043C0E2BFE8), UINT64_C(0xAC714AD28A03B4D7),
+ UINT64_C(0xBAE1BA48FE4A0FD5), UINT64_C(0x718CD0D9B4AB04EA),
+ UINT64_C(0x2C3A6E6A6B8818AB), UINT64_C(0xE75704FB21691394),
+ UINT64_C(0x9656130DD4CF2029), UINT64_C(0x5D3B799C9E2E2B16),
+ UINT64_C(0x008DC72F410D3757), UINT64_C(0xCBE0ADBE0BEC3C68),
+ UINT64_C(0x6791E76C81EF88BF), UINT64_C(0xACFC8DFDCB0E8380),
+ UINT64_C(0xF14A334E142D9FC1), UINT64_C(0x3A2759DF5ECC94FE),
+ UINT64_C(0x4B264E29AB6AA743), UINT64_C(0x804B24B8E18BAC7C),
+ UINT64_C(0xDDFD9A0B3EA8B03D), UINT64_C(0x1690F09A7449BB02),
+ UINT64_C(0xF1DD7B3ED73AC638), UINT64_C(0x3AB011AF9DDBCD07),
+ UINT64_C(0x6706AF1C42F8D146), UINT64_C(0xAC6BC58D0819DA79),
+ UINT64_C(0xDD6AD27BFDBFE9C4), UINT64_C(0x1607B8EAB75EE2FB),
+ UINT64_C(0x4BB10659687DFEBA), UINT64_C(0x80DC6CC8229CF585),
+ UINT64_C(0x2CAD261AA89F4152), UINT64_C(0xE7C04C8BE27E4A6D),
+ UINT64_C(0xBA76F2383D5D562C), UINT64_C(0x711B98A977BC5D13),
+ UINT64_C(0x001A8F5F821A6EAE), UINT64_C(0xCB77E5CEC8FB6591),
+ UINT64_C(0x96C15B7D17D879D0), UINT64_C(0x5DAC31EC5D3972EF),
+ UINT64_C(0x4B3CC1762970C9ED), UINT64_C(0x8051ABE76391C2D2),
+ UINT64_C(0xDDE71554BCB2DE93), UINT64_C(0x168A7FC5F653D5AC),
+ UINT64_C(0x678B683303F5E611), UINT64_C(0xACE602A24914ED2E),
+ UINT64_C(0xF150BC119637F16F), UINT64_C(0x3A3DD680DCD6FA50),
+ UINT64_C(0x964C9C5256D54E87), UINT64_C(0x5D21F6C31C3445B8),
+ UINT64_C(0x00974870C31759F9), UINT64_C(0xCBFA22E189F652C6),
+ UINT64_C(0xBAFB35177C50617B), UINT64_C(0x71965F8636B16A44),
+ UINT64_C(0x2C20E135E9927605), UINT64_C(0xE74D8BA4A3737D3A),
+ UINT64_C(0xE2BBF77CAE758C71), UINT64_C(0x29D69DEDE494874E),
+ UINT64_C(0x7460235E3BB79B0F), UINT64_C(0xBF0D49CF71569030),
+ UINT64_C(0xCE0C5E3984F0A38D), UINT64_C(0x056134A8CE11A8B2),
+ UINT64_C(0x58D78A1B1132B4F3), UINT64_C(0x93BAE08A5BD3BFCC),
+ UINT64_C(0x3FCBAA58D1D00B1B), UINT64_C(0xF4A6C0C99B310024),
+ UINT64_C(0xA9107E7A44121C65), UINT64_C(0x627D14EB0EF3175A),
+ UINT64_C(0x137C031DFB5524E7), UINT64_C(0xD811698CB1B42FD8),
+ UINT64_C(0x85A7D73F6E973399), UINT64_C(0x4ECABDAE247638A6),
+ UINT64_C(0x585A4D34503F83A4), UINT64_C(0x933727A51ADE889B),
+ UINT64_C(0xCE819916C5FD94DA), UINT64_C(0x05ECF3878F1C9FE5),
+ UINT64_C(0x74EDE4717ABAAC58), UINT64_C(0xBF808EE0305BA767),
+ UINT64_C(0xE2363053EF78BB26), UINT64_C(0x295B5AC2A599B019),
+ UINT64_C(0x852A10102F9A04CE), UINT64_C(0x4E477A81657B0FF1),
+ UINT64_C(0x13F1C432BA5813B0), UINT64_C(0xD89CAEA3F0B9188F),
+ UINT64_C(0xA99DB955051F2B32), UINT64_C(0x62F0D3C44FFE200D),
+ UINT64_C(0x3F466D7790DD3C4C), UINT64_C(0xF42B07E6DA3C3773),
+ UINT64_C(0x13668C42794F4A49), UINT64_C(0xD80BE6D333AE4176),
+ UINT64_C(0x85BD5860EC8D5D37), UINT64_C(0x4ED032F1A66C5608),
+ UINT64_C(0x3FD1250753CA65B5), UINT64_C(0xF4BC4F96192B6E8A),
+ UINT64_C(0xA90AF125C60872CB), UINT64_C(0x62679BB48CE979F4),
+ UINT64_C(0xCE16D16606EACD23), UINT64_C(0x057BBBF74C0BC61C),
+ UINT64_C(0x58CD05449328DA5D), UINT64_C(0x93A06FD5D9C9D162),
+ UINT64_C(0xE2A178232C6FE2DF), UINT64_C(0x29CC12B2668EE9E0),
+ UINT64_C(0x747AAC01B9ADF5A1), UINT64_C(0xBF17C690F34CFE9E),
+ UINT64_C(0xA987360A8705459C), UINT64_C(0x62EA5C9BCDE44EA3),
+ UINT64_C(0x3F5CE22812C752E2), UINT64_C(0xF43188B9582659DD),
+ UINT64_C(0x85309F4FAD806A60), UINT64_C(0x4E5DF5DEE761615F),
+ UINT64_C(0x13EB4B6D38427D1E), UINT64_C(0xD88621FC72A37621),
+ UINT64_C(0x74F76B2EF8A0C2F6), UINT64_C(0xBF9A01BFB241C9C9),
+ UINT64_C(0xE22CBF0C6D62D588), UINT64_C(0x2941D59D2783DEB7),
+ UINT64_C(0x5840C26BD225ED0A), UINT64_C(0x932DA8FA98C4E635),
+ UINT64_C(0xCE9B164947E7FA74), UINT64_C(0x05F67CD80D06F14B),
+ UINT64_C(0xC477EFF95CEB18E3), UINT64_C(0x0F1A8568160A13DC),
+ UINT64_C(0x52AC3BDBC9290F9D), UINT64_C(0x99C1514A83C804A2),
+ UINT64_C(0xE8C046BC766E371F), UINT64_C(0x23AD2C2D3C8F3C20),
+ UINT64_C(0x7E1B929EE3AC2061), UINT64_C(0xB576F80FA94D2B5E),
+ UINT64_C(0x1907B2DD234E9F89), UINT64_C(0xD26AD84C69AF94B6),
+ UINT64_C(0x8FDC66FFB68C88F7), UINT64_C(0x44B10C6EFC6D83C8),
+ UINT64_C(0x35B01B9809CBB075), UINT64_C(0xFEDD7109432ABB4A),
+ UINT64_C(0xA36BCFBA9C09A70B), UINT64_C(0x6806A52BD6E8AC34),
+ UINT64_C(0x7E9655B1A2A11736), UINT64_C(0xB5FB3F20E8401C09),
+ UINT64_C(0xE84D819337630048), UINT64_C(0x2320EB027D820B77),
+ UINT64_C(0x5221FCF4882438CA), UINT64_C(0x994C9665C2C533F5),
+ UINT64_C(0xC4FA28D61DE62FB4), UINT64_C(0x0F9742475707248B),
+ UINT64_C(0xA3E60895DD04905C), UINT64_C(0x688B620497E59B63),
+ UINT64_C(0x353DDCB748C68722), UINT64_C(0xFE50B62602278C1D),
+ UINT64_C(0x8F51A1D0F781BFA0), UINT64_C(0x443CCB41BD60B49F),
+ UINT64_C(0x198A75F26243A8DE), UINT64_C(0xD2E71F6328A2A3E1),
+ UINT64_C(0x35AA94C78BD1DEDB), UINT64_C(0xFEC7FE56C130D5E4),
+ UINT64_C(0xA37140E51E13C9A5), UINT64_C(0x681C2A7454F2C29A),
+ UINT64_C(0x191D3D82A154F127), UINT64_C(0xD2705713EBB5FA18),
+ UINT64_C(0x8FC6E9A03496E659), UINT64_C(0x44AB83317E77ED66),
+ UINT64_C(0xE8DAC9E3F47459B1), UINT64_C(0x23B7A372BE95528E),
+ UINT64_C(0x7E011DC161B64ECF), UINT64_C(0xB56C77502B5745F0),
+ UINT64_C(0xC46D60A6DEF1764D), UINT64_C(0x0F000A3794107D72),
+ UINT64_C(0x52B6B4844B336133), UINT64_C(0x99DBDE1501D26A0C),
+ UINT64_C(0x8F4B2E8F759BD10E), UINT64_C(0x4426441E3F7ADA31),
+ UINT64_C(0x1990FAADE059C670), UINT64_C(0xD2FD903CAAB8CD4F),
+ UINT64_C(0xA3FC87CA5F1EFEF2), UINT64_C(0x6891ED5B15FFF5CD),
+ UINT64_C(0x352753E8CADCE98C), UINT64_C(0xFE4A3979803DE2B3),
+ UINT64_C(0x523B73AB0A3E5664), UINT64_C(0x9956193A40DF5D5B),
+ UINT64_C(0xC4E0A7899FFC411A), UINT64_C(0x0F8DCD18D51D4A25),
+ UINT64_C(0x7E8CDAEE20BB7998), UINT64_C(0xB5E1B07F6A5A72A7),
+ UINT64_C(0xE8570ECCB5796EE6), UINT64_C(0x233A645DFF9865D9),
+ UINT64_C(0x26CC1885F29E9492), UINT64_C(0xEDA17214B87F9FAD),
+ UINT64_C(0xB017CCA7675C83EC), UINT64_C(0x7B7AA6362DBD88D3),
+ UINT64_C(0x0A7BB1C0D81BBB6E), UINT64_C(0xC116DB5192FAB051),
+ UINT64_C(0x9CA065E24DD9AC10), UINT64_C(0x57CD0F730738A72F),
+ UINT64_C(0xFBBC45A18D3B13F8), UINT64_C(0x30D12F30C7DA18C7),
+ UINT64_C(0x6D67918318F90486), UINT64_C(0xA60AFB1252180FB9),
+ UINT64_C(0xD70BECE4A7BE3C04), UINT64_C(0x1C668675ED5F373B),
+ UINT64_C(0x41D038C6327C2B7A), UINT64_C(0x8ABD5257789D2045),
+ UINT64_C(0x9C2DA2CD0CD49B47), UINT64_C(0x5740C85C46359078),
+ UINT64_C(0x0AF676EF99168C39), UINT64_C(0xC19B1C7ED3F78706),
+ UINT64_C(0xB09A0B882651B4BB), UINT64_C(0x7BF761196CB0BF84),
+ UINT64_C(0x2641DFAAB393A3C5), UINT64_C(0xED2CB53BF972A8FA),
+ UINT64_C(0x415DFFE973711C2D), UINT64_C(0x8A30957839901712),
+ UINT64_C(0xD7862BCBE6B30B53), UINT64_C(0x1CEB415AAC52006C),
+ UINT64_C(0x6DEA56AC59F433D1), UINT64_C(0xA6873C3D131538EE),
+ UINT64_C(0xFB31828ECC3624AF), UINT64_C(0x305CE81F86D72F90),
+ UINT64_C(0xD71163BB25A452AA), UINT64_C(0x1C7C092A6F455995),
+ UINT64_C(0x41CAB799B06645D4), UINT64_C(0x8AA7DD08FA874EEB),
+ UINT64_C(0xFBA6CAFE0F217D56), UINT64_C(0x30CBA06F45C07669),
+ UINT64_C(0x6D7D1EDC9AE36A28), UINT64_C(0xA610744DD0026117),
+ UINT64_C(0x0A613E9F5A01D5C0), UINT64_C(0xC10C540E10E0DEFF),
+ UINT64_C(0x9CBAEABDCFC3C2BE), UINT64_C(0x57D7802C8522C981),
+ UINT64_C(0x26D697DA7084FA3C), UINT64_C(0xEDBBFD4B3A65F103),
+ UINT64_C(0xB00D43F8E546ED42), UINT64_C(0x7B602969AFA7E67D),
+ UINT64_C(0x6DF0D9F3DBEE5D7F), UINT64_C(0xA69DB362910F5640),
+ UINT64_C(0xFB2B0DD14E2C4A01), UINT64_C(0x3046674004CD413E),
+ UINT64_C(0x414770B6F16B7283), UINT64_C(0x8A2A1A27BB8A79BC),
+ UINT64_C(0xD79CA49464A965FD), UINT64_C(0x1CF1CE052E486EC2),
+ UINT64_C(0xB08084D7A44BDA15), UINT64_C(0x7BEDEE46EEAAD12A),
+ UINT64_C(0x265B50F53189CD6B), UINT64_C(0xED363A647B68C654),
+ UINT64_C(0x9C372D928ECEF5E9), UINT64_C(0x575A4703C42FFED6),
+ UINT64_C(0x0AECF9B01B0CE297), UINT64_C(0xC181932151EDE9A8)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0xDCA12C225E8AEE1D),
+ UINT64_C(0xB8435944BC14DD3B), UINT64_C(0x64E27566E29E3326),
+ UINT64_C(0x7087B2887829BA77), UINT64_C(0xAC269EAA26A3546A),
+ UINT64_C(0xC8C4EBCCC43D674C), UINT64_C(0x1465C7EE9AB78951),
+ UINT64_C(0xE00E6511F15274EF), UINT64_C(0x3CAF4933AFD89AF2),
+ UINT64_C(0x584D3C554D46A9D4), UINT64_C(0x84EC107713CC47C9),
+ UINT64_C(0x9089D799897BCE98), UINT64_C(0x4C28FBBBD7F12085),
+ UINT64_C(0x28CA8EDD356F13A3), UINT64_C(0xF46BA2FF6BE5FDBE),
+ UINT64_C(0x4503C48DC90A304C), UINT64_C(0x99A2E8AF9780DE51),
+ UINT64_C(0xFD409DC9751EED77), UINT64_C(0x21E1B1EB2B94036A),
+ UINT64_C(0x35847605B1238A3B), UINT64_C(0xE9255A27EFA96426),
+ UINT64_C(0x8DC72F410D375700), UINT64_C(0x5166036353BDB91D),
+ UINT64_C(0xA50DA19C385844A3), UINT64_C(0x79AC8DBE66D2AABE),
+ UINT64_C(0x1D4EF8D8844C9998), UINT64_C(0xC1EFD4FADAC67785),
+ UINT64_C(0xD58A13144071FED4), UINT64_C(0x092B3F361EFB10C9),
+ UINT64_C(0x6DC94A50FC6523EF), UINT64_C(0xB1686672A2EFCDF2),
+ UINT64_C(0x8A06881B93156098), UINT64_C(0x56A7A439CD9F8E85),
+ UINT64_C(0x3245D15F2F01BDA3), UINT64_C(0xEEE4FD7D718B53BE),
+ UINT64_C(0xFA813A93EB3CDAEF), UINT64_C(0x262016B1B5B634F2),
+ UINT64_C(0x42C263D7572807D4), UINT64_C(0x9E634FF509A2E9C9),
+ UINT64_C(0x6A08ED0A62471477), UINT64_C(0xB6A9C1283CCDFA6A),
+ UINT64_C(0xD24BB44EDE53C94C), UINT64_C(0x0EEA986C80D92751),
+ UINT64_C(0x1A8F5F821A6EAE00), UINT64_C(0xC62E73A044E4401D),
+ UINT64_C(0xA2CC06C6A67A733B), UINT64_C(0x7E6D2AE4F8F09D26),
+ UINT64_C(0xCF054C965A1F50D4), UINT64_C(0x13A460B40495BEC9),
+ UINT64_C(0x774615D2E60B8DEF), UINT64_C(0xABE739F0B88163F2),
+ UINT64_C(0xBF82FE1E2236EAA3), UINT64_C(0x6323D23C7CBC04BE),
+ UINT64_C(0x07C1A75A9E223798), UINT64_C(0xDB608B78C0A8D985),
+ UINT64_C(0x2F0B2987AB4D243B), UINT64_C(0xF3AA05A5F5C7CA26),
+ UINT64_C(0x974870C31759F900), UINT64_C(0x4BE95CE149D3171D),
+ UINT64_C(0x5F8C9B0FD3649E4C), UINT64_C(0x832DB72D8DEE7051),
+ UINT64_C(0xE7CFC24B6F704377), UINT64_C(0x3B6EEE6931FAAD6A),
+ UINT64_C(0x91131E980D8418A2), UINT64_C(0x4DB232BA530EF6BF),
+ UINT64_C(0x295047DCB190C599), UINT64_C(0xF5F16BFEEF1A2B84),
+ UINT64_C(0xE194AC1075ADA2D5), UINT64_C(0x3D3580322B274CC8),
+ UINT64_C(0x59D7F554C9B97FEE), UINT64_C(0x8576D976973391F3),
+ UINT64_C(0x711D7B89FCD66C4D), UINT64_C(0xADBC57ABA25C8250),
+ UINT64_C(0xC95E22CD40C2B176), UINT64_C(0x15FF0EEF1E485F6B),
+ UINT64_C(0x019AC90184FFD63A), UINT64_C(0xDD3BE523DA753827),
+ UINT64_C(0xB9D9904538EB0B01), UINT64_C(0x6578BC676661E51C),
+ UINT64_C(0xD410DA15C48E28EE), UINT64_C(0x08B1F6379A04C6F3),
+ UINT64_C(0x6C538351789AF5D5), UINT64_C(0xB0F2AF7326101BC8),
+ UINT64_C(0xA497689DBCA79299), UINT64_C(0x783644BFE22D7C84),
+ UINT64_C(0x1CD431D900B34FA2), UINT64_C(0xC0751DFB5E39A1BF),
+ UINT64_C(0x341EBF0435DC5C01), UINT64_C(0xE8BF93266B56B21C),
+ UINT64_C(0x8C5DE64089C8813A), UINT64_C(0x50FCCA62D7426F27),
+ UINT64_C(0x44990D8C4DF5E676), UINT64_C(0x983821AE137F086B),
+ UINT64_C(0xFCDA54C8F1E13B4D), UINT64_C(0x207B78EAAF6BD550),
+ UINT64_C(0x1B1596839E91783A), UINT64_C(0xC7B4BAA1C01B9627),
+ UINT64_C(0xA356CFC72285A501), UINT64_C(0x7FF7E3E57C0F4B1C),
+ UINT64_C(0x6B92240BE6B8C24D), UINT64_C(0xB7330829B8322C50),
+ UINT64_C(0xD3D17D4F5AAC1F76), UINT64_C(0x0F70516D0426F16B),
+ UINT64_C(0xFB1BF3926FC30CD5), UINT64_C(0x27BADFB03149E2C8),
+ UINT64_C(0x4358AAD6D3D7D1EE), UINT64_C(0x9FF986F48D5D3FF3),
+ UINT64_C(0x8B9C411A17EAB6A2), UINT64_C(0x573D6D38496058BF),
+ UINT64_C(0x33DF185EABFE6B99), UINT64_C(0xEF7E347CF5748584),
+ UINT64_C(0x5E16520E579B4876), UINT64_C(0x82B77E2C0911A66B),
+ UINT64_C(0xE6550B4AEB8F954D), UINT64_C(0x3AF42768B5057B50),
+ UINT64_C(0x2E91E0862FB2F201), UINT64_C(0xF230CCA471381C1C),
+ UINT64_C(0x96D2B9C293A62F3A), UINT64_C(0x4A7395E0CD2CC127),
+ UINT64_C(0xBE18371FA6C93C99), UINT64_C(0x62B91B3DF843D284),
+ UINT64_C(0x065B6E5B1ADDE1A2), UINT64_C(0xDAFA427944570FBF),
+ UINT64_C(0xCE9F8597DEE086EE), UINT64_C(0x123EA9B5806A68F3),
+ UINT64_C(0x76DCDCD362F45BD5), UINT64_C(0xAA7DF0F13C7EB5C8),
+ UINT64_C(0xA739329F30A7E9D6), UINT64_C(0x7B981EBD6E2D07CB),
+ UINT64_C(0x1F7A6BDB8CB334ED), UINT64_C(0xC3DB47F9D239DAF0),
+ UINT64_C(0xD7BE8017488E53A1), UINT64_C(0x0B1FAC351604BDBC),
+ UINT64_C(0x6FFDD953F49A8E9A), UINT64_C(0xB35CF571AA106087),
+ UINT64_C(0x4737578EC1F59D39), UINT64_C(0x9B967BAC9F7F7324),
+ UINT64_C(0xFF740ECA7DE14002), UINT64_C(0x23D522E8236BAE1F),
+ UINT64_C(0x37B0E506B9DC274E), UINT64_C(0xEB11C924E756C953),
+ UINT64_C(0x8FF3BC4205C8FA75), UINT64_C(0x535290605B421468),
+ UINT64_C(0xE23AF612F9ADD99A), UINT64_C(0x3E9BDA30A7273787),
+ UINT64_C(0x5A79AF5645B904A1), UINT64_C(0x86D883741B33EABC),
+ UINT64_C(0x92BD449A818463ED), UINT64_C(0x4E1C68B8DF0E8DF0),
+ UINT64_C(0x2AFE1DDE3D90BED6), UINT64_C(0xF65F31FC631A50CB),
+ UINT64_C(0x0234930308FFAD75), UINT64_C(0xDE95BF2156754368),
+ UINT64_C(0xBA77CA47B4EB704E), UINT64_C(0x66D6E665EA619E53),
+ UINT64_C(0x72B3218B70D61702), UINT64_C(0xAE120DA92E5CF91F),
+ UINT64_C(0xCAF078CFCCC2CA39), UINT64_C(0x165154ED92482424),
+ UINT64_C(0x2D3FBA84A3B2894E), UINT64_C(0xF19E96A6FD386753),
+ UINT64_C(0x957CE3C01FA65475), UINT64_C(0x49DDCFE2412CBA68),
+ UINT64_C(0x5DB8080CDB9B3339), UINT64_C(0x8119242E8511DD24),
+ UINT64_C(0xE5FB5148678FEE02), UINT64_C(0x395A7D6A3905001F),
+ UINT64_C(0xCD31DF9552E0FDA1), UINT64_C(0x1190F3B70C6A13BC),
+ UINT64_C(0x757286D1EEF4209A), UINT64_C(0xA9D3AAF3B07ECE87),
+ UINT64_C(0xBDB66D1D2AC947D6), UINT64_C(0x6117413F7443A9CB),
+ UINT64_C(0x05F5345996DD9AED), UINT64_C(0xD954187BC85774F0),
+ UINT64_C(0x683C7E096AB8B902), UINT64_C(0xB49D522B3432571F),
+ UINT64_C(0xD07F274DD6AC6439), UINT64_C(0x0CDE0B6F88268A24),
+ UINT64_C(0x18BBCC8112910375), UINT64_C(0xC41AE0A34C1BED68),
+ UINT64_C(0xA0F895C5AE85DE4E), UINT64_C(0x7C59B9E7F00F3053),
+ UINT64_C(0x88321B189BEACDED), UINT64_C(0x5493373AC56023F0),
+ UINT64_C(0x3071425C27FE10D6), UINT64_C(0xECD06E7E7974FECB),
+ UINT64_C(0xF8B5A990E3C3779A), UINT64_C(0x241485B2BD499987),
+ UINT64_C(0x40F6F0D45FD7AAA1), UINT64_C(0x9C57DCF6015D44BC),
+ UINT64_C(0x362A2C073D23F174), UINT64_C(0xEA8B002563A91F69),
+ UINT64_C(0x8E69754381372C4F), UINT64_C(0x52C85961DFBDC252),
+ UINT64_C(0x46AD9E8F450A4B03), UINT64_C(0x9A0CB2AD1B80A51E),
+ UINT64_C(0xFEEEC7CBF91E9638), UINT64_C(0x224FEBE9A7947825),
+ UINT64_C(0xD6244916CC71859B), UINT64_C(0x0A85653492FB6B86),
+ UINT64_C(0x6E671052706558A0), UINT64_C(0xB2C63C702EEFB6BD),
+ UINT64_C(0xA6A3FB9EB4583FEC), UINT64_C(0x7A02D7BCEAD2D1F1),
+ UINT64_C(0x1EE0A2DA084CE2D7), UINT64_C(0xC2418EF856C60CCA),
+ UINT64_C(0x7329E88AF429C138), UINT64_C(0xAF88C4A8AAA32F25),
+ UINT64_C(0xCB6AB1CE483D1C03), UINT64_C(0x17CB9DEC16B7F21E),
+ UINT64_C(0x03AE5A028C007B4F), UINT64_C(0xDF0F7620D28A9552),
+ UINT64_C(0xBBED03463014A674), UINT64_C(0x674C2F646E9E4869),
+ UINT64_C(0x93278D9B057BB5D7), UINT64_C(0x4F86A1B95BF15BCA),
+ UINT64_C(0x2B64D4DFB96F68EC), UINT64_C(0xF7C5F8FDE7E586F1),
+ UINT64_C(0xE3A03F137D520FA0), UINT64_C(0x3F01133123D8E1BD),
+ UINT64_C(0x5BE36657C146D29B), UINT64_C(0x87424A759FCC3C86),
+ UINT64_C(0xBC2CA41CAE3691EC), UINT64_C(0x608D883EF0BC7FF1),
+ UINT64_C(0x046FFD5812224CD7), UINT64_C(0xD8CED17A4CA8A2CA),
+ UINT64_C(0xCCAB1694D61F2B9B), UINT64_C(0x100A3AB68895C586),
+ UINT64_C(0x74E84FD06A0BF6A0), UINT64_C(0xA84963F2348118BD),
+ UINT64_C(0x5C22C10D5F64E503), UINT64_C(0x8083ED2F01EE0B1E),
+ UINT64_C(0xE4619849E3703838), UINT64_C(0x38C0B46BBDFAD625),
+ UINT64_C(0x2CA57385274D5F74), UINT64_C(0xF0045FA779C7B169),
+ UINT64_C(0x94E62AC19B59824F), UINT64_C(0x484706E3C5D36C52),
+ UINT64_C(0xF92F6091673CA1A0), UINT64_C(0x258E4CB339B64FBD),
+ UINT64_C(0x416C39D5DB287C9B), UINT64_C(0x9DCD15F785A29286),
+ UINT64_C(0x89A8D2191F151BD7), UINT64_C(0x5509FE3B419FF5CA),
+ UINT64_C(0x31EB8B5DA301C6EC), UINT64_C(0xED4AA77FFD8B28F1),
+ UINT64_C(0x19210580966ED54F), UINT64_C(0xC58029A2C8E43B52),
+ UINT64_C(0xA1625CC42A7A0874), UINT64_C(0x7DC370E674F0E669),
+ UINT64_C(0x69A6B708EE476F38), UINT64_C(0xB5079B2AB0CD8125),
+ UINT64_C(0xD1E5EE4C5253B203), UINT64_C(0x0D44C26E0CD95C1E)
+ }
+};
diff --git a/src/liblzma/check/crc64_table_le.h b/src/liblzma/check/crc64_table_le.h
new file mode 100644
index 0000000..1196b31
--- /dev/null
+++ b/src/liblzma/check/crc64_table_le.h
@@ -0,0 +1,521 @@
+/* This file has been automatically generated by crc64_tablegen.c. */
+
+const uint64_t lzma_crc64_table[4][256] = {
+ {
+ UINT64_C(0x0000000000000000), UINT64_C(0xB32E4CBE03A75F6F),
+ UINT64_C(0xF4843657A840A05B), UINT64_C(0x47AA7AE9ABE7FF34),
+ UINT64_C(0x7BD0C384FF8F5E33), UINT64_C(0xC8FE8F3AFC28015C),
+ UINT64_C(0x8F54F5D357CFFE68), UINT64_C(0x3C7AB96D5468A107),
+ UINT64_C(0xF7A18709FF1EBC66), UINT64_C(0x448FCBB7FCB9E309),
+ UINT64_C(0x0325B15E575E1C3D), UINT64_C(0xB00BFDE054F94352),
+ UINT64_C(0x8C71448D0091E255), UINT64_C(0x3F5F08330336BD3A),
+ UINT64_C(0x78F572DAA8D1420E), UINT64_C(0xCBDB3E64AB761D61),
+ UINT64_C(0x7D9BA13851336649), UINT64_C(0xCEB5ED8652943926),
+ UINT64_C(0x891F976FF973C612), UINT64_C(0x3A31DBD1FAD4997D),
+ UINT64_C(0x064B62BCAEBC387A), UINT64_C(0xB5652E02AD1B6715),
+ UINT64_C(0xF2CF54EB06FC9821), UINT64_C(0x41E11855055BC74E),
+ UINT64_C(0x8A3A2631AE2DDA2F), UINT64_C(0x39146A8FAD8A8540),
+ UINT64_C(0x7EBE1066066D7A74), UINT64_C(0xCD905CD805CA251B),
+ UINT64_C(0xF1EAE5B551A2841C), UINT64_C(0x42C4A90B5205DB73),
+ UINT64_C(0x056ED3E2F9E22447), UINT64_C(0xB6409F5CFA457B28),
+ UINT64_C(0xFB374270A266CC92), UINT64_C(0x48190ECEA1C193FD),
+ UINT64_C(0x0FB374270A266CC9), UINT64_C(0xBC9D3899098133A6),
+ UINT64_C(0x80E781F45DE992A1), UINT64_C(0x33C9CD4A5E4ECDCE),
+ UINT64_C(0x7463B7A3F5A932FA), UINT64_C(0xC74DFB1DF60E6D95),
+ UINT64_C(0x0C96C5795D7870F4), UINT64_C(0xBFB889C75EDF2F9B),
+ UINT64_C(0xF812F32EF538D0AF), UINT64_C(0x4B3CBF90F69F8FC0),
+ UINT64_C(0x774606FDA2F72EC7), UINT64_C(0xC4684A43A15071A8),
+ UINT64_C(0x83C230AA0AB78E9C), UINT64_C(0x30EC7C140910D1F3),
+ UINT64_C(0x86ACE348F355AADB), UINT64_C(0x3582AFF6F0F2F5B4),
+ UINT64_C(0x7228D51F5B150A80), UINT64_C(0xC10699A158B255EF),
+ UINT64_C(0xFD7C20CC0CDAF4E8), UINT64_C(0x4E526C720F7DAB87),
+ UINT64_C(0x09F8169BA49A54B3), UINT64_C(0xBAD65A25A73D0BDC),
+ UINT64_C(0x710D64410C4B16BD), UINT64_C(0xC22328FF0FEC49D2),
+ UINT64_C(0x85895216A40BB6E6), UINT64_C(0x36A71EA8A7ACE989),
+ UINT64_C(0x0ADDA7C5F3C4488E), UINT64_C(0xB9F3EB7BF06317E1),
+ UINT64_C(0xFE5991925B84E8D5), UINT64_C(0x4D77DD2C5823B7BA),
+ UINT64_C(0x64B62BCAEBC387A1), UINT64_C(0xD7986774E864D8CE),
+ UINT64_C(0x90321D9D438327FA), UINT64_C(0x231C512340247895),
+ UINT64_C(0x1F66E84E144CD992), UINT64_C(0xAC48A4F017EB86FD),
+ UINT64_C(0xEBE2DE19BC0C79C9), UINT64_C(0x58CC92A7BFAB26A6),
+ UINT64_C(0x9317ACC314DD3BC7), UINT64_C(0x2039E07D177A64A8),
+ UINT64_C(0x67939A94BC9D9B9C), UINT64_C(0xD4BDD62ABF3AC4F3),
+ UINT64_C(0xE8C76F47EB5265F4), UINT64_C(0x5BE923F9E8F53A9B),
+ UINT64_C(0x1C4359104312C5AF), UINT64_C(0xAF6D15AE40B59AC0),
+ UINT64_C(0x192D8AF2BAF0E1E8), UINT64_C(0xAA03C64CB957BE87),
+ UINT64_C(0xEDA9BCA512B041B3), UINT64_C(0x5E87F01B11171EDC),
+ UINT64_C(0x62FD4976457FBFDB), UINT64_C(0xD1D305C846D8E0B4),
+ UINT64_C(0x96797F21ED3F1F80), UINT64_C(0x2557339FEE9840EF),
+ UINT64_C(0xEE8C0DFB45EE5D8E), UINT64_C(0x5DA24145464902E1),
+ UINT64_C(0x1A083BACEDAEFDD5), UINT64_C(0xA9267712EE09A2BA),
+ UINT64_C(0x955CCE7FBA6103BD), UINT64_C(0x267282C1B9C65CD2),
+ UINT64_C(0x61D8F8281221A3E6), UINT64_C(0xD2F6B4961186FC89),
+ UINT64_C(0x9F8169BA49A54B33), UINT64_C(0x2CAF25044A02145C),
+ UINT64_C(0x6B055FEDE1E5EB68), UINT64_C(0xD82B1353E242B407),
+ UINT64_C(0xE451AA3EB62A1500), UINT64_C(0x577FE680B58D4A6F),
+ UINT64_C(0x10D59C691E6AB55B), UINT64_C(0xA3FBD0D71DCDEA34),
+ UINT64_C(0x6820EEB3B6BBF755), UINT64_C(0xDB0EA20DB51CA83A),
+ UINT64_C(0x9CA4D8E41EFB570E), UINT64_C(0x2F8A945A1D5C0861),
+ UINT64_C(0x13F02D374934A966), UINT64_C(0xA0DE61894A93F609),
+ UINT64_C(0xE7741B60E174093D), UINT64_C(0x545A57DEE2D35652),
+ UINT64_C(0xE21AC88218962D7A), UINT64_C(0x5134843C1B317215),
+ UINT64_C(0x169EFED5B0D68D21), UINT64_C(0xA5B0B26BB371D24E),
+ UINT64_C(0x99CA0B06E7197349), UINT64_C(0x2AE447B8E4BE2C26),
+ UINT64_C(0x6D4E3D514F59D312), UINT64_C(0xDE6071EF4CFE8C7D),
+ UINT64_C(0x15BB4F8BE788911C), UINT64_C(0xA6950335E42FCE73),
+ UINT64_C(0xE13F79DC4FC83147), UINT64_C(0x521135624C6F6E28),
+ UINT64_C(0x6E6B8C0F1807CF2F), UINT64_C(0xDD45C0B11BA09040),
+ UINT64_C(0x9AEFBA58B0476F74), UINT64_C(0x29C1F6E6B3E0301B),
+ UINT64_C(0xC96C5795D7870F42), UINT64_C(0x7A421B2BD420502D),
+ UINT64_C(0x3DE861C27FC7AF19), UINT64_C(0x8EC62D7C7C60F076),
+ UINT64_C(0xB2BC941128085171), UINT64_C(0x0192D8AF2BAF0E1E),
+ UINT64_C(0x4638A2468048F12A), UINT64_C(0xF516EEF883EFAE45),
+ UINT64_C(0x3ECDD09C2899B324), UINT64_C(0x8DE39C222B3EEC4B),
+ UINT64_C(0xCA49E6CB80D9137F), UINT64_C(0x7967AA75837E4C10),
+ UINT64_C(0x451D1318D716ED17), UINT64_C(0xF6335FA6D4B1B278),
+ UINT64_C(0xB199254F7F564D4C), UINT64_C(0x02B769F17CF11223),
+ UINT64_C(0xB4F7F6AD86B4690B), UINT64_C(0x07D9BA1385133664),
+ UINT64_C(0x4073C0FA2EF4C950), UINT64_C(0xF35D8C442D53963F),
+ UINT64_C(0xCF273529793B3738), UINT64_C(0x7C0979977A9C6857),
+ UINT64_C(0x3BA3037ED17B9763), UINT64_C(0x888D4FC0D2DCC80C),
+ UINT64_C(0x435671A479AAD56D), UINT64_C(0xF0783D1A7A0D8A02),
+ UINT64_C(0xB7D247F3D1EA7536), UINT64_C(0x04FC0B4DD24D2A59),
+ UINT64_C(0x3886B22086258B5E), UINT64_C(0x8BA8FE9E8582D431),
+ UINT64_C(0xCC0284772E652B05), UINT64_C(0x7F2CC8C92DC2746A),
+ UINT64_C(0x325B15E575E1C3D0), UINT64_C(0x8175595B76469CBF),
+ UINT64_C(0xC6DF23B2DDA1638B), UINT64_C(0x75F16F0CDE063CE4),
+ UINT64_C(0x498BD6618A6E9DE3), UINT64_C(0xFAA59ADF89C9C28C),
+ UINT64_C(0xBD0FE036222E3DB8), UINT64_C(0x0E21AC88218962D7),
+ UINT64_C(0xC5FA92EC8AFF7FB6), UINT64_C(0x76D4DE52895820D9),
+ UINT64_C(0x317EA4BB22BFDFED), UINT64_C(0x8250E80521188082),
+ UINT64_C(0xBE2A516875702185), UINT64_C(0x0D041DD676D77EEA),
+ UINT64_C(0x4AAE673FDD3081DE), UINT64_C(0xF9802B81DE97DEB1),
+ UINT64_C(0x4FC0B4DD24D2A599), UINT64_C(0xFCEEF8632775FAF6),
+ UINT64_C(0xBB44828A8C9205C2), UINT64_C(0x086ACE348F355AAD),
+ UINT64_C(0x34107759DB5DFBAA), UINT64_C(0x873E3BE7D8FAA4C5),
+ UINT64_C(0xC094410E731D5BF1), UINT64_C(0x73BA0DB070BA049E),
+ UINT64_C(0xB86133D4DBCC19FF), UINT64_C(0x0B4F7F6AD86B4690),
+ UINT64_C(0x4CE50583738CB9A4), UINT64_C(0xFFCB493D702BE6CB),
+ UINT64_C(0xC3B1F050244347CC), UINT64_C(0x709FBCEE27E418A3),
+ UINT64_C(0x3735C6078C03E797), UINT64_C(0x841B8AB98FA4B8F8),
+ UINT64_C(0xADDA7C5F3C4488E3), UINT64_C(0x1EF430E13FE3D78C),
+ UINT64_C(0x595E4A08940428B8), UINT64_C(0xEA7006B697A377D7),
+ UINT64_C(0xD60ABFDBC3CBD6D0), UINT64_C(0x6524F365C06C89BF),
+ UINT64_C(0x228E898C6B8B768B), UINT64_C(0x91A0C532682C29E4),
+ UINT64_C(0x5A7BFB56C35A3485), UINT64_C(0xE955B7E8C0FD6BEA),
+ UINT64_C(0xAEFFCD016B1A94DE), UINT64_C(0x1DD181BF68BDCBB1),
+ UINT64_C(0x21AB38D23CD56AB6), UINT64_C(0x9285746C3F7235D9),
+ UINT64_C(0xD52F0E859495CAED), UINT64_C(0x6601423B97329582),
+ UINT64_C(0xD041DD676D77EEAA), UINT64_C(0x636F91D96ED0B1C5),
+ UINT64_C(0x24C5EB30C5374EF1), UINT64_C(0x97EBA78EC690119E),
+ UINT64_C(0xAB911EE392F8B099), UINT64_C(0x18BF525D915FEFF6),
+ UINT64_C(0x5F1528B43AB810C2), UINT64_C(0xEC3B640A391F4FAD),
+ UINT64_C(0x27E05A6E926952CC), UINT64_C(0x94CE16D091CE0DA3),
+ UINT64_C(0xD3646C393A29F297), UINT64_C(0x604A2087398EADF8),
+ UINT64_C(0x5C3099EA6DE60CFF), UINT64_C(0xEF1ED5546E415390),
+ UINT64_C(0xA8B4AFBDC5A6ACA4), UINT64_C(0x1B9AE303C601F3CB),
+ UINT64_C(0x56ED3E2F9E224471), UINT64_C(0xE5C372919D851B1E),
+ UINT64_C(0xA26908783662E42A), UINT64_C(0x114744C635C5BB45),
+ UINT64_C(0x2D3DFDAB61AD1A42), UINT64_C(0x9E13B115620A452D),
+ UINT64_C(0xD9B9CBFCC9EDBA19), UINT64_C(0x6A978742CA4AE576),
+ UINT64_C(0xA14CB926613CF817), UINT64_C(0x1262F598629BA778),
+ UINT64_C(0x55C88F71C97C584C), UINT64_C(0xE6E6C3CFCADB0723),
+ UINT64_C(0xDA9C7AA29EB3A624), UINT64_C(0x69B2361C9D14F94B),
+ UINT64_C(0x2E184CF536F3067F), UINT64_C(0x9D36004B35545910),
+ UINT64_C(0x2B769F17CF112238), UINT64_C(0x9858D3A9CCB67D57),
+ UINT64_C(0xDFF2A94067518263), UINT64_C(0x6CDCE5FE64F6DD0C),
+ UINT64_C(0x50A65C93309E7C0B), UINT64_C(0xE388102D33392364),
+ UINT64_C(0xA4226AC498DEDC50), UINT64_C(0x170C267A9B79833F),
+ UINT64_C(0xDCD7181E300F9E5E), UINT64_C(0x6FF954A033A8C131),
+ UINT64_C(0x28532E49984F3E05), UINT64_C(0x9B7D62F79BE8616A),
+ UINT64_C(0xA707DB9ACF80C06D), UINT64_C(0x14299724CC279F02),
+ UINT64_C(0x5383EDCD67C06036), UINT64_C(0xE0ADA17364673F59)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0x54E979925CD0F10D),
+ UINT64_C(0xA9D2F324B9A1E21A), UINT64_C(0xFD3B8AB6E5711317),
+ UINT64_C(0xC17D4962DC4DDAB1), UINT64_C(0x959430F0809D2BBC),
+ UINT64_C(0x68AFBA4665EC38AB), UINT64_C(0x3C46C3D4393CC9A6),
+ UINT64_C(0x10223DEE1795ABE7), UINT64_C(0x44CB447C4B455AEA),
+ UINT64_C(0xB9F0CECAAE3449FD), UINT64_C(0xED19B758F2E4B8F0),
+ UINT64_C(0xD15F748CCBD87156), UINT64_C(0x85B60D1E9708805B),
+ UINT64_C(0x788D87A87279934C), UINT64_C(0x2C64FE3A2EA96241),
+ UINT64_C(0x20447BDC2F2B57CE), UINT64_C(0x74AD024E73FBA6C3),
+ UINT64_C(0x899688F8968AB5D4), UINT64_C(0xDD7FF16ACA5A44D9),
+ UINT64_C(0xE13932BEF3668D7F), UINT64_C(0xB5D04B2CAFB67C72),
+ UINT64_C(0x48EBC19A4AC76F65), UINT64_C(0x1C02B80816179E68),
+ UINT64_C(0x3066463238BEFC29), UINT64_C(0x648F3FA0646E0D24),
+ UINT64_C(0x99B4B516811F1E33), UINT64_C(0xCD5DCC84DDCFEF3E),
+ UINT64_C(0xF11B0F50E4F32698), UINT64_C(0xA5F276C2B823D795),
+ UINT64_C(0x58C9FC745D52C482), UINT64_C(0x0C2085E60182358F),
+ UINT64_C(0x4088F7B85E56AF9C), UINT64_C(0x14618E2A02865E91),
+ UINT64_C(0xE95A049CE7F74D86), UINT64_C(0xBDB37D0EBB27BC8B),
+ UINT64_C(0x81F5BEDA821B752D), UINT64_C(0xD51CC748DECB8420),
+ UINT64_C(0x28274DFE3BBA9737), UINT64_C(0x7CCE346C676A663A),
+ UINT64_C(0x50AACA5649C3047B), UINT64_C(0x0443B3C41513F576),
+ UINT64_C(0xF9783972F062E661), UINT64_C(0xAD9140E0ACB2176C),
+ UINT64_C(0x91D78334958EDECA), UINT64_C(0xC53EFAA6C95E2FC7),
+ UINT64_C(0x380570102C2F3CD0), UINT64_C(0x6CEC098270FFCDDD),
+ UINT64_C(0x60CC8C64717DF852), UINT64_C(0x3425F5F62DAD095F),
+ UINT64_C(0xC91E7F40C8DC1A48), UINT64_C(0x9DF706D2940CEB45),
+ UINT64_C(0xA1B1C506AD3022E3), UINT64_C(0xF558BC94F1E0D3EE),
+ UINT64_C(0x086336221491C0F9), UINT64_C(0x5C8A4FB0484131F4),
+ UINT64_C(0x70EEB18A66E853B5), UINT64_C(0x2407C8183A38A2B8),
+ UINT64_C(0xD93C42AEDF49B1AF), UINT64_C(0x8DD53B3C839940A2),
+ UINT64_C(0xB193F8E8BAA58904), UINT64_C(0xE57A817AE6757809),
+ UINT64_C(0x18410BCC03046B1E), UINT64_C(0x4CA8725E5FD49A13),
+ UINT64_C(0x8111EF70BCAD5F38), UINT64_C(0xD5F896E2E07DAE35),
+ UINT64_C(0x28C31C54050CBD22), UINT64_C(0x7C2A65C659DC4C2F),
+ UINT64_C(0x406CA61260E08589), UINT64_C(0x1485DF803C307484),
+ UINT64_C(0xE9BE5536D9416793), UINT64_C(0xBD572CA48591969E),
+ UINT64_C(0x9133D29EAB38F4DF), UINT64_C(0xC5DAAB0CF7E805D2),
+ UINT64_C(0x38E121BA129916C5), UINT64_C(0x6C0858284E49E7C8),
+ UINT64_C(0x504E9BFC77752E6E), UINT64_C(0x04A7E26E2BA5DF63),
+ UINT64_C(0xF99C68D8CED4CC74), UINT64_C(0xAD75114A92043D79),
+ UINT64_C(0xA15594AC938608F6), UINT64_C(0xF5BCED3ECF56F9FB),
+ UINT64_C(0x088767882A27EAEC), UINT64_C(0x5C6E1E1A76F71BE1),
+ UINT64_C(0x6028DDCE4FCBD247), UINT64_C(0x34C1A45C131B234A),
+ UINT64_C(0xC9FA2EEAF66A305D), UINT64_C(0x9D135778AABAC150),
+ UINT64_C(0xB177A9428413A311), UINT64_C(0xE59ED0D0D8C3521C),
+ UINT64_C(0x18A55A663DB2410B), UINT64_C(0x4C4C23F46162B006),
+ UINT64_C(0x700AE020585E79A0), UINT64_C(0x24E399B2048E88AD),
+ UINT64_C(0xD9D81304E1FF9BBA), UINT64_C(0x8D316A96BD2F6AB7),
+ UINT64_C(0xC19918C8E2FBF0A4), UINT64_C(0x9570615ABE2B01A9),
+ UINT64_C(0x684BEBEC5B5A12BE), UINT64_C(0x3CA2927E078AE3B3),
+ UINT64_C(0x00E451AA3EB62A15), UINT64_C(0x540D28386266DB18),
+ UINT64_C(0xA936A28E8717C80F), UINT64_C(0xFDDFDB1CDBC73902),
+ UINT64_C(0xD1BB2526F56E5B43), UINT64_C(0x85525CB4A9BEAA4E),
+ UINT64_C(0x7869D6024CCFB959), UINT64_C(0x2C80AF90101F4854),
+ UINT64_C(0x10C66C44292381F2), UINT64_C(0x442F15D675F370FF),
+ UINT64_C(0xB9149F60908263E8), UINT64_C(0xEDFDE6F2CC5292E5),
+ UINT64_C(0xE1DD6314CDD0A76A), UINT64_C(0xB5341A8691005667),
+ UINT64_C(0x480F903074714570), UINT64_C(0x1CE6E9A228A1B47D),
+ UINT64_C(0x20A02A76119D7DDB), UINT64_C(0x744953E44D4D8CD6),
+ UINT64_C(0x8972D952A83C9FC1), UINT64_C(0xDD9BA0C0F4EC6ECC),
+ UINT64_C(0xF1FF5EFADA450C8D), UINT64_C(0xA51627688695FD80),
+ UINT64_C(0x582DADDE63E4EE97), UINT64_C(0x0CC4D44C3F341F9A),
+ UINT64_C(0x308217980608D63C), UINT64_C(0x646B6E0A5AD82731),
+ UINT64_C(0x9950E4BCBFA93426), UINT64_C(0xCDB99D2EE379C52B),
+ UINT64_C(0x90FB71CAD654A0F5), UINT64_C(0xC41208588A8451F8),
+ UINT64_C(0x392982EE6FF542EF), UINT64_C(0x6DC0FB7C3325B3E2),
+ UINT64_C(0x518638A80A197A44), UINT64_C(0x056F413A56C98B49),
+ UINT64_C(0xF854CB8CB3B8985E), UINT64_C(0xACBDB21EEF686953),
+ UINT64_C(0x80D94C24C1C10B12), UINT64_C(0xD43035B69D11FA1F),
+ UINT64_C(0x290BBF007860E908), UINT64_C(0x7DE2C69224B01805),
+ UINT64_C(0x41A405461D8CD1A3), UINT64_C(0x154D7CD4415C20AE),
+ UINT64_C(0xE876F662A42D33B9), UINT64_C(0xBC9F8FF0F8FDC2B4),
+ UINT64_C(0xB0BF0A16F97FF73B), UINT64_C(0xE4567384A5AF0636),
+ UINT64_C(0x196DF93240DE1521), UINT64_C(0x4D8480A01C0EE42C),
+ UINT64_C(0x71C2437425322D8A), UINT64_C(0x252B3AE679E2DC87),
+ UINT64_C(0xD810B0509C93CF90), UINT64_C(0x8CF9C9C2C0433E9D),
+ UINT64_C(0xA09D37F8EEEA5CDC), UINT64_C(0xF4744E6AB23AADD1),
+ UINT64_C(0x094FC4DC574BBEC6), UINT64_C(0x5DA6BD4E0B9B4FCB),
+ UINT64_C(0x61E07E9A32A7866D), UINT64_C(0x350907086E777760),
+ UINT64_C(0xC8328DBE8B066477), UINT64_C(0x9CDBF42CD7D6957A),
+ UINT64_C(0xD073867288020F69), UINT64_C(0x849AFFE0D4D2FE64),
+ UINT64_C(0x79A1755631A3ED73), UINT64_C(0x2D480CC46D731C7E),
+ UINT64_C(0x110ECF10544FD5D8), UINT64_C(0x45E7B682089F24D5),
+ UINT64_C(0xB8DC3C34EDEE37C2), UINT64_C(0xEC3545A6B13EC6CF),
+ UINT64_C(0xC051BB9C9F97A48E), UINT64_C(0x94B8C20EC3475583),
+ UINT64_C(0x698348B826364694), UINT64_C(0x3D6A312A7AE6B799),
+ UINT64_C(0x012CF2FE43DA7E3F), UINT64_C(0x55C58B6C1F0A8F32),
+ UINT64_C(0xA8FE01DAFA7B9C25), UINT64_C(0xFC177848A6AB6D28),
+ UINT64_C(0xF037FDAEA72958A7), UINT64_C(0xA4DE843CFBF9A9AA),
+ UINT64_C(0x59E50E8A1E88BABD), UINT64_C(0x0D0C771842584BB0),
+ UINT64_C(0x314AB4CC7B648216), UINT64_C(0x65A3CD5E27B4731B),
+ UINT64_C(0x989847E8C2C5600C), UINT64_C(0xCC713E7A9E159101),
+ UINT64_C(0xE015C040B0BCF340), UINT64_C(0xB4FCB9D2EC6C024D),
+ UINT64_C(0x49C73364091D115A), UINT64_C(0x1D2E4AF655CDE057),
+ UINT64_C(0x216889226CF129F1), UINT64_C(0x7581F0B03021D8FC),
+ UINT64_C(0x88BA7A06D550CBEB), UINT64_C(0xDC53039489803AE6),
+ UINT64_C(0x11EA9EBA6AF9FFCD), UINT64_C(0x4503E72836290EC0),
+ UINT64_C(0xB8386D9ED3581DD7), UINT64_C(0xECD1140C8F88ECDA),
+ UINT64_C(0xD097D7D8B6B4257C), UINT64_C(0x847EAE4AEA64D471),
+ UINT64_C(0x794524FC0F15C766), UINT64_C(0x2DAC5D6E53C5366B),
+ UINT64_C(0x01C8A3547D6C542A), UINT64_C(0x5521DAC621BCA527),
+ UINT64_C(0xA81A5070C4CDB630), UINT64_C(0xFCF329E2981D473D),
+ UINT64_C(0xC0B5EA36A1218E9B), UINT64_C(0x945C93A4FDF17F96),
+ UINT64_C(0x6967191218806C81), UINT64_C(0x3D8E608044509D8C),
+ UINT64_C(0x31AEE56645D2A803), UINT64_C(0x65479CF41902590E),
+ UINT64_C(0x987C1642FC734A19), UINT64_C(0xCC956FD0A0A3BB14),
+ UINT64_C(0xF0D3AC04999F72B2), UINT64_C(0xA43AD596C54F83BF),
+ UINT64_C(0x59015F20203E90A8), UINT64_C(0x0DE826B27CEE61A5),
+ UINT64_C(0x218CD888524703E4), UINT64_C(0x7565A11A0E97F2E9),
+ UINT64_C(0x885E2BACEBE6E1FE), UINT64_C(0xDCB7523EB73610F3),
+ UINT64_C(0xE0F191EA8E0AD955), UINT64_C(0xB418E878D2DA2858),
+ UINT64_C(0x492362CE37AB3B4F), UINT64_C(0x1DCA1B5C6B7BCA42),
+ UINT64_C(0x5162690234AF5051), UINT64_C(0x058B1090687FA15C),
+ UINT64_C(0xF8B09A268D0EB24B), UINT64_C(0xAC59E3B4D1DE4346),
+ UINT64_C(0x901F2060E8E28AE0), UINT64_C(0xC4F659F2B4327BED),
+ UINT64_C(0x39CDD344514368FA), UINT64_C(0x6D24AAD60D9399F7),
+ UINT64_C(0x414054EC233AFBB6), UINT64_C(0x15A92D7E7FEA0ABB),
+ UINT64_C(0xE892A7C89A9B19AC), UINT64_C(0xBC7BDE5AC64BE8A1),
+ UINT64_C(0x803D1D8EFF772107), UINT64_C(0xD4D4641CA3A7D00A),
+ UINT64_C(0x29EFEEAA46D6C31D), UINT64_C(0x7D0697381A063210),
+ UINT64_C(0x712612DE1B84079F), UINT64_C(0x25CF6B4C4754F692),
+ UINT64_C(0xD8F4E1FAA225E585), UINT64_C(0x8C1D9868FEF51488),
+ UINT64_C(0xB05B5BBCC7C9DD2E), UINT64_C(0xE4B2222E9B192C23),
+ UINT64_C(0x1989A8987E683F34), UINT64_C(0x4D60D10A22B8CE39),
+ UINT64_C(0x61042F300C11AC78), UINT64_C(0x35ED56A250C15D75),
+ UINT64_C(0xC8D6DC14B5B04E62), UINT64_C(0x9C3FA586E960BF6F),
+ UINT64_C(0xA0796652D05C76C9), UINT64_C(0xF4901FC08C8C87C4),
+ UINT64_C(0x09AB957669FD94D3), UINT64_C(0x5D42ECE4352D65DE)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0x3F0BE14A916A6DCB),
+ UINT64_C(0x7E17C29522D4DB96), UINT64_C(0x411C23DFB3BEB65D),
+ UINT64_C(0xFC2F852A45A9B72C), UINT64_C(0xC3246460D4C3DAE7),
+ UINT64_C(0x823847BF677D6CBA), UINT64_C(0xBD33A6F5F6170171),
+ UINT64_C(0x6A87A57F245D70DD), UINT64_C(0x558C4435B5371D16),
+ UINT64_C(0x149067EA0689AB4B), UINT64_C(0x2B9B86A097E3C680),
+ UINT64_C(0x96A8205561F4C7F1), UINT64_C(0xA9A3C11FF09EAA3A),
+ UINT64_C(0xE8BFE2C043201C67), UINT64_C(0xD7B4038AD24A71AC),
+ UINT64_C(0xD50F4AFE48BAE1BA), UINT64_C(0xEA04ABB4D9D08C71),
+ UINT64_C(0xAB18886B6A6E3A2C), UINT64_C(0x94136921FB0457E7),
+ UINT64_C(0x2920CFD40D135696), UINT64_C(0x162B2E9E9C793B5D),
+ UINT64_C(0x57370D412FC78D00), UINT64_C(0x683CEC0BBEADE0CB),
+ UINT64_C(0xBF88EF816CE79167), UINT64_C(0x80830ECBFD8DFCAC),
+ UINT64_C(0xC19F2D144E334AF1), UINT64_C(0xFE94CC5EDF59273A),
+ UINT64_C(0x43A76AAB294E264B), UINT64_C(0x7CAC8BE1B8244B80),
+ UINT64_C(0x3DB0A83E0B9AFDDD), UINT64_C(0x02BB49749AF09016),
+ UINT64_C(0x38C63AD73E7BDDF1), UINT64_C(0x07CDDB9DAF11B03A),
+ UINT64_C(0x46D1F8421CAF0667), UINT64_C(0x79DA19088DC56BAC),
+ UINT64_C(0xC4E9BFFD7BD26ADD), UINT64_C(0xFBE25EB7EAB80716),
+ UINT64_C(0xBAFE7D685906B14B), UINT64_C(0x85F59C22C86CDC80),
+ UINT64_C(0x52419FA81A26AD2C), UINT64_C(0x6D4A7EE28B4CC0E7),
+ UINT64_C(0x2C565D3D38F276BA), UINT64_C(0x135DBC77A9981B71),
+ UINT64_C(0xAE6E1A825F8F1A00), UINT64_C(0x9165FBC8CEE577CB),
+ UINT64_C(0xD079D8177D5BC196), UINT64_C(0xEF72395DEC31AC5D),
+ UINT64_C(0xEDC9702976C13C4B), UINT64_C(0xD2C29163E7AB5180),
+ UINT64_C(0x93DEB2BC5415E7DD), UINT64_C(0xACD553F6C57F8A16),
+ UINT64_C(0x11E6F50333688B67), UINT64_C(0x2EED1449A202E6AC),
+ UINT64_C(0x6FF1379611BC50F1), UINT64_C(0x50FAD6DC80D63D3A),
+ UINT64_C(0x874ED556529C4C96), UINT64_C(0xB845341CC3F6215D),
+ UINT64_C(0xF95917C370489700), UINT64_C(0xC652F689E122FACB),
+ UINT64_C(0x7B61507C1735FBBA), UINT64_C(0x446AB136865F9671),
+ UINT64_C(0x057692E935E1202C), UINT64_C(0x3A7D73A3A48B4DE7),
+ UINT64_C(0x718C75AE7CF7BBE2), UINT64_C(0x4E8794E4ED9DD629),
+ UINT64_C(0x0F9BB73B5E236074), UINT64_C(0x30905671CF490DBF),
+ UINT64_C(0x8DA3F084395E0CCE), UINT64_C(0xB2A811CEA8346105),
+ UINT64_C(0xF3B432111B8AD758), UINT64_C(0xCCBFD35B8AE0BA93),
+ UINT64_C(0x1B0BD0D158AACB3F), UINT64_C(0x2400319BC9C0A6F4),
+ UINT64_C(0x651C12447A7E10A9), UINT64_C(0x5A17F30EEB147D62),
+ UINT64_C(0xE72455FB1D037C13), UINT64_C(0xD82FB4B18C6911D8),
+ UINT64_C(0x9933976E3FD7A785), UINT64_C(0xA6387624AEBDCA4E),
+ UINT64_C(0xA4833F50344D5A58), UINT64_C(0x9B88DE1AA5273793),
+ UINT64_C(0xDA94FDC5169981CE), UINT64_C(0xE59F1C8F87F3EC05),
+ UINT64_C(0x58ACBA7A71E4ED74), UINT64_C(0x67A75B30E08E80BF),
+ UINT64_C(0x26BB78EF533036E2), UINT64_C(0x19B099A5C25A5B29),
+ UINT64_C(0xCE049A2F10102A85), UINT64_C(0xF10F7B65817A474E),
+ UINT64_C(0xB01358BA32C4F113), UINT64_C(0x8F18B9F0A3AE9CD8),
+ UINT64_C(0x322B1F0555B99DA9), UINT64_C(0x0D20FE4FC4D3F062),
+ UINT64_C(0x4C3CDD90776D463F), UINT64_C(0x73373CDAE6072BF4),
+ UINT64_C(0x494A4F79428C6613), UINT64_C(0x7641AE33D3E60BD8),
+ UINT64_C(0x375D8DEC6058BD85), UINT64_C(0x08566CA6F132D04E),
+ UINT64_C(0xB565CA530725D13F), UINT64_C(0x8A6E2B19964FBCF4),
+ UINT64_C(0xCB7208C625F10AA9), UINT64_C(0xF479E98CB49B6762),
+ UINT64_C(0x23CDEA0666D116CE), UINT64_C(0x1CC60B4CF7BB7B05),
+ UINT64_C(0x5DDA28934405CD58), UINT64_C(0x62D1C9D9D56FA093),
+ UINT64_C(0xDFE26F2C2378A1E2), UINT64_C(0xE0E98E66B212CC29),
+ UINT64_C(0xA1F5ADB901AC7A74), UINT64_C(0x9EFE4CF390C617BF),
+ UINT64_C(0x9C4505870A3687A9), UINT64_C(0xA34EE4CD9B5CEA62),
+ UINT64_C(0xE252C71228E25C3F), UINT64_C(0xDD592658B98831F4),
+ UINT64_C(0x606A80AD4F9F3085), UINT64_C(0x5F6161E7DEF55D4E),
+ UINT64_C(0x1E7D42386D4BEB13), UINT64_C(0x2176A372FC2186D8),
+ UINT64_C(0xF6C2A0F82E6BF774), UINT64_C(0xC9C941B2BF019ABF),
+ UINT64_C(0x88D5626D0CBF2CE2), UINT64_C(0xB7DE83279DD54129),
+ UINT64_C(0x0AED25D26BC24058), UINT64_C(0x35E6C498FAA82D93),
+ UINT64_C(0x74FAE74749169BCE), UINT64_C(0x4BF1060DD87CF605),
+ UINT64_C(0xE318EB5CF9EF77C4), UINT64_C(0xDC130A1668851A0F),
+ UINT64_C(0x9D0F29C9DB3BAC52), UINT64_C(0xA204C8834A51C199),
+ UINT64_C(0x1F376E76BC46C0E8), UINT64_C(0x203C8F3C2D2CAD23),
+ UINT64_C(0x6120ACE39E921B7E), UINT64_C(0x5E2B4DA90FF876B5),
+ UINT64_C(0x899F4E23DDB20719), UINT64_C(0xB694AF694CD86AD2),
+ UINT64_C(0xF7888CB6FF66DC8F), UINT64_C(0xC8836DFC6E0CB144),
+ UINT64_C(0x75B0CB09981BB035), UINT64_C(0x4ABB2A430971DDFE),
+ UINT64_C(0x0BA7099CBACF6BA3), UINT64_C(0x34ACE8D62BA50668),
+ UINT64_C(0x3617A1A2B155967E), UINT64_C(0x091C40E8203FFBB5),
+ UINT64_C(0x4800633793814DE8), UINT64_C(0x770B827D02EB2023),
+ UINT64_C(0xCA382488F4FC2152), UINT64_C(0xF533C5C265964C99),
+ UINT64_C(0xB42FE61DD628FAC4), UINT64_C(0x8B2407574742970F),
+ UINT64_C(0x5C9004DD9508E6A3), UINT64_C(0x639BE59704628B68),
+ UINT64_C(0x2287C648B7DC3D35), UINT64_C(0x1D8C270226B650FE),
+ UINT64_C(0xA0BF81F7D0A1518F), UINT64_C(0x9FB460BD41CB3C44),
+ UINT64_C(0xDEA84362F2758A19), UINT64_C(0xE1A3A228631FE7D2),
+ UINT64_C(0xDBDED18BC794AA35), UINT64_C(0xE4D530C156FEC7FE),
+ UINT64_C(0xA5C9131EE54071A3), UINT64_C(0x9AC2F254742A1C68),
+ UINT64_C(0x27F154A1823D1D19), UINT64_C(0x18FAB5EB135770D2),
+ UINT64_C(0x59E69634A0E9C68F), UINT64_C(0x66ED777E3183AB44),
+ UINT64_C(0xB15974F4E3C9DAE8), UINT64_C(0x8E5295BE72A3B723),
+ UINT64_C(0xCF4EB661C11D017E), UINT64_C(0xF045572B50776CB5),
+ UINT64_C(0x4D76F1DEA6606DC4), UINT64_C(0x727D1094370A000F),
+ UINT64_C(0x3361334B84B4B652), UINT64_C(0x0C6AD20115DEDB99),
+ UINT64_C(0x0ED19B758F2E4B8F), UINT64_C(0x31DA7A3F1E442644),
+ UINT64_C(0x70C659E0ADFA9019), UINT64_C(0x4FCDB8AA3C90FDD2),
+ UINT64_C(0xF2FE1E5FCA87FCA3), UINT64_C(0xCDF5FF155BED9168),
+ UINT64_C(0x8CE9DCCAE8532735), UINT64_C(0xB3E23D8079394AFE),
+ UINT64_C(0x64563E0AAB733B52), UINT64_C(0x5B5DDF403A195699),
+ UINT64_C(0x1A41FC9F89A7E0C4), UINT64_C(0x254A1DD518CD8D0F),
+ UINT64_C(0x9879BB20EEDA8C7E), UINT64_C(0xA7725A6A7FB0E1B5),
+ UINT64_C(0xE66E79B5CC0E57E8), UINT64_C(0xD96598FF5D643A23),
+ UINT64_C(0x92949EF28518CC26), UINT64_C(0xAD9F7FB81472A1ED),
+ UINT64_C(0xEC835C67A7CC17B0), UINT64_C(0xD388BD2D36A67A7B),
+ UINT64_C(0x6EBB1BD8C0B17B0A), UINT64_C(0x51B0FA9251DB16C1),
+ UINT64_C(0x10ACD94DE265A09C), UINT64_C(0x2FA73807730FCD57),
+ UINT64_C(0xF8133B8DA145BCFB), UINT64_C(0xC718DAC7302FD130),
+ UINT64_C(0x8604F9188391676D), UINT64_C(0xB90F185212FB0AA6),
+ UINT64_C(0x043CBEA7E4EC0BD7), UINT64_C(0x3B375FED7586661C),
+ UINT64_C(0x7A2B7C32C638D041), UINT64_C(0x45209D785752BD8A),
+ UINT64_C(0x479BD40CCDA22D9C), UINT64_C(0x789035465CC84057),
+ UINT64_C(0x398C1699EF76F60A), UINT64_C(0x0687F7D37E1C9BC1),
+ UINT64_C(0xBBB45126880B9AB0), UINT64_C(0x84BFB06C1961F77B),
+ UINT64_C(0xC5A393B3AADF4126), UINT64_C(0xFAA872F93BB52CED),
+ UINT64_C(0x2D1C7173E9FF5D41), UINT64_C(0x121790397895308A),
+ UINT64_C(0x530BB3E6CB2B86D7), UINT64_C(0x6C0052AC5A41EB1C),
+ UINT64_C(0xD133F459AC56EA6D), UINT64_C(0xEE3815133D3C87A6),
+ UINT64_C(0xAF2436CC8E8231FB), UINT64_C(0x902FD7861FE85C30),
+ UINT64_C(0xAA52A425BB6311D7), UINT64_C(0x9559456F2A097C1C),
+ UINT64_C(0xD44566B099B7CA41), UINT64_C(0xEB4E87FA08DDA78A),
+ UINT64_C(0x567D210FFECAA6FB), UINT64_C(0x6976C0456FA0CB30),
+ UINT64_C(0x286AE39ADC1E7D6D), UINT64_C(0x176102D04D7410A6),
+ UINT64_C(0xC0D5015A9F3E610A), UINT64_C(0xFFDEE0100E540CC1),
+ UINT64_C(0xBEC2C3CFBDEABA9C), UINT64_C(0x81C922852C80D757),
+ UINT64_C(0x3CFA8470DA97D626), UINT64_C(0x03F1653A4BFDBBED),
+ UINT64_C(0x42ED46E5F8430DB0), UINT64_C(0x7DE6A7AF6929607B),
+ UINT64_C(0x7F5DEEDBF3D9F06D), UINT64_C(0x40560F9162B39DA6),
+ UINT64_C(0x014A2C4ED10D2BFB), UINT64_C(0x3E41CD0440674630),
+ UINT64_C(0x83726BF1B6704741), UINT64_C(0xBC798ABB271A2A8A),
+ UINT64_C(0xFD65A96494A49CD7), UINT64_C(0xC26E482E05CEF11C),
+ UINT64_C(0x15DA4BA4D78480B0), UINT64_C(0x2AD1AAEE46EEED7B),
+ UINT64_C(0x6BCD8931F5505B26), UINT64_C(0x54C6687B643A36ED),
+ UINT64_C(0xE9F5CE8E922D379C), UINT64_C(0xD6FE2FC403475A57),
+ UINT64_C(0x97E20C1BB0F9EC0A), UINT64_C(0xA8E9ED51219381C1)
+ }, {
+ UINT64_C(0x0000000000000000), UINT64_C(0x1DEE8A5E222CA1DC),
+ UINT64_C(0x3BDD14BC445943B8), UINT64_C(0x26339EE26675E264),
+ UINT64_C(0x77BA297888B28770), UINT64_C(0x6A54A326AA9E26AC),
+ UINT64_C(0x4C673DC4CCEBC4C8), UINT64_C(0x5189B79AEEC76514),
+ UINT64_C(0xEF7452F111650EE0), UINT64_C(0xF29AD8AF3349AF3C),
+ UINT64_C(0xD4A9464D553C4D58), UINT64_C(0xC947CC137710EC84),
+ UINT64_C(0x98CE7B8999D78990), UINT64_C(0x8520F1D7BBFB284C),
+ UINT64_C(0xA3136F35DD8ECA28), UINT64_C(0xBEFDE56BFFA26BF4),
+ UINT64_C(0x4C300AC98DC40345), UINT64_C(0x51DE8097AFE8A299),
+ UINT64_C(0x77ED1E75C99D40FD), UINT64_C(0x6A03942BEBB1E121),
+ UINT64_C(0x3B8A23B105768435), UINT64_C(0x2664A9EF275A25E9),
+ UINT64_C(0x0057370D412FC78D), UINT64_C(0x1DB9BD5363036651),
+ UINT64_C(0xA34458389CA10DA5), UINT64_C(0xBEAAD266BE8DAC79),
+ UINT64_C(0x98994C84D8F84E1D), UINT64_C(0x8577C6DAFAD4EFC1),
+ UINT64_C(0xD4FE714014138AD5), UINT64_C(0xC910FB1E363F2B09),
+ UINT64_C(0xEF2365FC504AC96D), UINT64_C(0xF2CDEFA2726668B1),
+ UINT64_C(0x986015931B88068A), UINT64_C(0x858E9FCD39A4A756),
+ UINT64_C(0xA3BD012F5FD14532), UINT64_C(0xBE538B717DFDE4EE),
+ UINT64_C(0xEFDA3CEB933A81FA), UINT64_C(0xF234B6B5B1162026),
+ UINT64_C(0xD4072857D763C242), UINT64_C(0xC9E9A209F54F639E),
+ UINT64_C(0x771447620AED086A), UINT64_C(0x6AFACD3C28C1A9B6),
+ UINT64_C(0x4CC953DE4EB44BD2), UINT64_C(0x5127D9806C98EA0E),
+ UINT64_C(0x00AE6E1A825F8F1A), UINT64_C(0x1D40E444A0732EC6),
+ UINT64_C(0x3B737AA6C606CCA2), UINT64_C(0x269DF0F8E42A6D7E),
+ UINT64_C(0xD4501F5A964C05CF), UINT64_C(0xC9BE9504B460A413),
+ UINT64_C(0xEF8D0BE6D2154677), UINT64_C(0xF26381B8F039E7AB),
+ UINT64_C(0xA3EA36221EFE82BF), UINT64_C(0xBE04BC7C3CD22363),
+ UINT64_C(0x9837229E5AA7C107), UINT64_C(0x85D9A8C0788B60DB),
+ UINT64_C(0x3B244DAB87290B2F), UINT64_C(0x26CAC7F5A505AAF3),
+ UINT64_C(0x00F95917C3704897), UINT64_C(0x1D17D349E15CE94B),
+ UINT64_C(0x4C9E64D30F9B8C5F), UINT64_C(0x5170EE8D2DB72D83),
+ UINT64_C(0x7743706F4BC2CFE7), UINT64_C(0x6AADFA3169EE6E3B),
+ UINT64_C(0xA218840D981E1391), UINT64_C(0xBFF60E53BA32B24D),
+ UINT64_C(0x99C590B1DC475029), UINT64_C(0x842B1AEFFE6BF1F5),
+ UINT64_C(0xD5A2AD7510AC94E1), UINT64_C(0xC84C272B3280353D),
+ UINT64_C(0xEE7FB9C954F5D759), UINT64_C(0xF391339776D97685),
+ UINT64_C(0x4D6CD6FC897B1D71), UINT64_C(0x50825CA2AB57BCAD),
+ UINT64_C(0x76B1C240CD225EC9), UINT64_C(0x6B5F481EEF0EFF15),
+ UINT64_C(0x3AD6FF8401C99A01), UINT64_C(0x273875DA23E53BDD),
+ UINT64_C(0x010BEB384590D9B9), UINT64_C(0x1CE5616667BC7865),
+ UINT64_C(0xEE288EC415DA10D4), UINT64_C(0xF3C6049A37F6B108),
+ UINT64_C(0xD5F59A785183536C), UINT64_C(0xC81B102673AFF2B0),
+ UINT64_C(0x9992A7BC9D6897A4), UINT64_C(0x847C2DE2BF443678),
+ UINT64_C(0xA24FB300D931D41C), UINT64_C(0xBFA1395EFB1D75C0),
+ UINT64_C(0x015CDC3504BF1E34), UINT64_C(0x1CB2566B2693BFE8),
+ UINT64_C(0x3A81C88940E65D8C), UINT64_C(0x276F42D762CAFC50),
+ UINT64_C(0x76E6F54D8C0D9944), UINT64_C(0x6B087F13AE213898),
+ UINT64_C(0x4D3BE1F1C854DAFC), UINT64_C(0x50D56BAFEA787B20),
+ UINT64_C(0x3A78919E8396151B), UINT64_C(0x27961BC0A1BAB4C7),
+ UINT64_C(0x01A58522C7CF56A3), UINT64_C(0x1C4B0F7CE5E3F77F),
+ UINT64_C(0x4DC2B8E60B24926B), UINT64_C(0x502C32B8290833B7),
+ UINT64_C(0x761FAC5A4F7DD1D3), UINT64_C(0x6BF126046D51700F),
+ UINT64_C(0xD50CC36F92F31BFB), UINT64_C(0xC8E24931B0DFBA27),
+ UINT64_C(0xEED1D7D3D6AA5843), UINT64_C(0xF33F5D8DF486F99F),
+ UINT64_C(0xA2B6EA171A419C8B), UINT64_C(0xBF586049386D3D57),
+ UINT64_C(0x996BFEAB5E18DF33), UINT64_C(0x848574F57C347EEF),
+ UINT64_C(0x76489B570E52165E), UINT64_C(0x6BA611092C7EB782),
+ UINT64_C(0x4D958FEB4A0B55E6), UINT64_C(0x507B05B56827F43A),
+ UINT64_C(0x01F2B22F86E0912E), UINT64_C(0x1C1C3871A4CC30F2),
+ UINT64_C(0x3A2FA693C2B9D296), UINT64_C(0x27C12CCDE095734A),
+ UINT64_C(0x993CC9A61F3718BE), UINT64_C(0x84D243F83D1BB962),
+ UINT64_C(0xA2E1DD1A5B6E5B06), UINT64_C(0xBF0F57447942FADA),
+ UINT64_C(0xEE86E0DE97859FCE), UINT64_C(0xF3686A80B5A93E12),
+ UINT64_C(0xD55BF462D3DCDC76), UINT64_C(0xC8B57E3CF1F07DAA),
+ UINT64_C(0xD6E9A7309F3239A7), UINT64_C(0xCB072D6EBD1E987B),
+ UINT64_C(0xED34B38CDB6B7A1F), UINT64_C(0xF0DA39D2F947DBC3),
+ UINT64_C(0xA1538E481780BED7), UINT64_C(0xBCBD041635AC1F0B),
+ UINT64_C(0x9A8E9AF453D9FD6F), UINT64_C(0x876010AA71F55CB3),
+ UINT64_C(0x399DF5C18E573747), UINT64_C(0x24737F9FAC7B969B),
+ UINT64_C(0x0240E17DCA0E74FF), UINT64_C(0x1FAE6B23E822D523),
+ UINT64_C(0x4E27DCB906E5B037), UINT64_C(0x53C956E724C911EB),
+ UINT64_C(0x75FAC80542BCF38F), UINT64_C(0x6814425B60905253),
+ UINT64_C(0x9AD9ADF912F63AE2), UINT64_C(0x873727A730DA9B3E),
+ UINT64_C(0xA104B94556AF795A), UINT64_C(0xBCEA331B7483D886),
+ UINT64_C(0xED6384819A44BD92), UINT64_C(0xF08D0EDFB8681C4E),
+ UINT64_C(0xD6BE903DDE1DFE2A), UINT64_C(0xCB501A63FC315FF6),
+ UINT64_C(0x75ADFF0803933402), UINT64_C(0x6843755621BF95DE),
+ UINT64_C(0x4E70EBB447CA77BA), UINT64_C(0x539E61EA65E6D666),
+ UINT64_C(0x0217D6708B21B372), UINT64_C(0x1FF95C2EA90D12AE),
+ UINT64_C(0x39CAC2CCCF78F0CA), UINT64_C(0x24244892ED545116),
+ UINT64_C(0x4E89B2A384BA3F2D), UINT64_C(0x536738FDA6969EF1),
+ UINT64_C(0x7554A61FC0E37C95), UINT64_C(0x68BA2C41E2CFDD49),
+ UINT64_C(0x39339BDB0C08B85D), UINT64_C(0x24DD11852E241981),
+ UINT64_C(0x02EE8F674851FBE5), UINT64_C(0x1F0005396A7D5A39),
+ UINT64_C(0xA1FDE05295DF31CD), UINT64_C(0xBC136A0CB7F39011),
+ UINT64_C(0x9A20F4EED1867275), UINT64_C(0x87CE7EB0F3AAD3A9),
+ UINT64_C(0xD647C92A1D6DB6BD), UINT64_C(0xCBA943743F411761),
+ UINT64_C(0xED9ADD965934F505), UINT64_C(0xF07457C87B1854D9),
+ UINT64_C(0x02B9B86A097E3C68), UINT64_C(0x1F5732342B529DB4),
+ UINT64_C(0x3964ACD64D277FD0), UINT64_C(0x248A26886F0BDE0C),
+ UINT64_C(0x7503911281CCBB18), UINT64_C(0x68ED1B4CA3E01AC4),
+ UINT64_C(0x4EDE85AEC595F8A0), UINT64_C(0x53300FF0E7B9597C),
+ UINT64_C(0xEDCDEA9B181B3288), UINT64_C(0xF02360C53A379354),
+ UINT64_C(0xD610FE275C427130), UINT64_C(0xCBFE74797E6ED0EC),
+ UINT64_C(0x9A77C3E390A9B5F8), UINT64_C(0x879949BDB2851424),
+ UINT64_C(0xA1AAD75FD4F0F640), UINT64_C(0xBC445D01F6DC579C),
+ UINT64_C(0x74F1233D072C2A36), UINT64_C(0x691FA96325008BEA),
+ UINT64_C(0x4F2C37814375698E), UINT64_C(0x52C2BDDF6159C852),
+ UINT64_C(0x034B0A458F9EAD46), UINT64_C(0x1EA5801BADB20C9A),
+ UINT64_C(0x38961EF9CBC7EEFE), UINT64_C(0x257894A7E9EB4F22),
+ UINT64_C(0x9B8571CC164924D6), UINT64_C(0x866BFB923465850A),
+ UINT64_C(0xA05865705210676E), UINT64_C(0xBDB6EF2E703CC6B2),
+ UINT64_C(0xEC3F58B49EFBA3A6), UINT64_C(0xF1D1D2EABCD7027A),
+ UINT64_C(0xD7E24C08DAA2E01E), UINT64_C(0xCA0CC656F88E41C2),
+ UINT64_C(0x38C129F48AE82973), UINT64_C(0x252FA3AAA8C488AF),
+ UINT64_C(0x031C3D48CEB16ACB), UINT64_C(0x1EF2B716EC9DCB17),
+ UINT64_C(0x4F7B008C025AAE03), UINT64_C(0x52958AD220760FDF),
+ UINT64_C(0x74A614304603EDBB), UINT64_C(0x69489E6E642F4C67),
+ UINT64_C(0xD7B57B059B8D2793), UINT64_C(0xCA5BF15BB9A1864F),
+ UINT64_C(0xEC686FB9DFD4642B), UINT64_C(0xF186E5E7FDF8C5F7),
+ UINT64_C(0xA00F527D133FA0E3), UINT64_C(0xBDE1D8233113013F),
+ UINT64_C(0x9BD246C15766E35B), UINT64_C(0x863CCC9F754A4287),
+ UINT64_C(0xEC9136AE1CA42CBC), UINT64_C(0xF17FBCF03E888D60),
+ UINT64_C(0xD74C221258FD6F04), UINT64_C(0xCAA2A84C7AD1CED8),
+ UINT64_C(0x9B2B1FD69416ABCC), UINT64_C(0x86C59588B63A0A10),
+ UINT64_C(0xA0F60B6AD04FE874), UINT64_C(0xBD188134F26349A8),
+ UINT64_C(0x03E5645F0DC1225C), UINT64_C(0x1E0BEE012FED8380),
+ UINT64_C(0x383870E3499861E4), UINT64_C(0x25D6FABD6BB4C038),
+ UINT64_C(0x745F4D278573A52C), UINT64_C(0x69B1C779A75F04F0),
+ UINT64_C(0x4F82599BC12AE694), UINT64_C(0x526CD3C5E3064748),
+ UINT64_C(0xA0A13C6791602FF9), UINT64_C(0xBD4FB639B34C8E25),
+ UINT64_C(0x9B7C28DBD5396C41), UINT64_C(0x8692A285F715CD9D),
+ UINT64_C(0xD71B151F19D2A889), UINT64_C(0xCAF59F413BFE0955),
+ UINT64_C(0xECC601A35D8BEB31), UINT64_C(0xF1288BFD7FA74AED),
+ UINT64_C(0x4FD56E9680052119), UINT64_C(0x523BE4C8A22980C5),
+ UINT64_C(0x74087A2AC45C62A1), UINT64_C(0x69E6F074E670C37D),
+ UINT64_C(0x386F47EE08B7A669), UINT64_C(0x2581CDB02A9B07B5),
+ UINT64_C(0x03B253524CEEE5D1), UINT64_C(0x1E5CD90C6EC2440D)
+ }
+};
diff --git a/src/liblzma/check/crc64_tablegen.c b/src/liblzma/check/crc64_tablegen.c
new file mode 100644
index 0000000..fddaa7e
--- /dev/null
+++ b/src/liblzma/check/crc64_tablegen.c
@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc64_tablegen.c
+/// \brief Generate crc64_table_le.h and crc64_table_be.h
+///
+/// Compiling: gcc -std=c99 -o crc64_tablegen crc64_tablegen.c
+/// Add -DWORDS_BIGENDIAN to generate big endian table.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <stdio.h>
+#include "../../common/tuklib_integer.h"
+
+
+static uint64_t crc64_table[4][256];
+
+
+extern void
+init_crc64_table(void)
+{
+ static const uint64_t poly64 = UINT64_C(0xC96C5795D7870F42);
+
+ for (size_t s = 0; s < 4; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ uint64_t r = s == 0 ? b : crc64_table[s - 1][b];
+
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly64;
+ else
+ r >>= 1;
+ }
+
+ crc64_table[s][b] = r;
+ }
+ }
+
+#ifdef WORDS_BIGENDIAN
+ for (size_t s = 0; s < 4; ++s)
+ for (size_t b = 0; b < 256; ++b)
+ crc64_table[s][b] = bswap64(crc64_table[s][b]);
+#endif
+
+ return;
+}
+
+
+static void
+print_crc64_table(void)
+{
+ printf("/* This file has been automatically generated by "
+ "crc64_tablegen.c. */\n\n"
+ "const uint64_t lzma_crc64_table[4][256] = {\n\t{");
+
+ for (size_t s = 0; s < 4; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ if ((b % 2) == 0)
+ printf("\n\t\t");
+
+ printf("UINT64_C(0x%016" PRIX64 ")",
+ crc64_table[s][b]);
+
+ if (b != 255)
+ printf(",%s", (b+1) % 2 == 0 ? "" : " ");
+ }
+
+ if (s == 3)
+ printf("\n\t}\n};\n");
+ else
+ printf("\n\t}, {");
+ }
+
+ return;
+}
+
+
+int
+main(void)
+{
+ init_crc64_table();
+ print_crc64_table();
+ return 0;
+}
diff --git a/src/liblzma/check/crc64_x86.S b/src/liblzma/check/crc64_x86.S
new file mode 100644
index 0000000..9aecf58
--- /dev/null
+++ b/src/liblzma/check/crc64_x86.S
@@ -0,0 +1,296 @@
+/*
+ * Speed-optimized CRC64 using slicing-by-four algorithm
+ *
+ * This uses only i386 instructions, but it is optimized for i686 and later
+ * (including e.g. Pentium II/III/IV, Athlon XP, and Core 2).
+ *
+ * Authors: Igor Pavlov (original CRC32 assembly code)
+ * Lasse Collin (CRC64 adaptation of the modified CRC32 code)
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ *
+ * This code needs lzma_crc64_table, which can be created using the
+ * following C code:
+
+uint64_t lzma_crc64_table[4][256];
+
+void
+init_table(void)
+{
+ // ECMA-182
+ static const uint64_t poly64 = UINT64_C(0xC96C5795D7870F42);
+
+ for (size_t s = 0; s < 4; ++s) {
+ for (size_t b = 0; b < 256; ++b) {
+ uint64_t r = s == 0 ? b : lzma_crc64_table[s - 1][b];
+
+ for (size_t i = 0; i < 8; ++i) {
+ if (r & 1)
+ r = (r >> 1) ^ poly64;
+ else
+ r >>= 1;
+ }
+
+ lzma_crc64_table[s][b] = r;
+ }
+ }
+}
+
+ * The prototype of the CRC64 function:
+ * extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc);
+ */
+
+/* When Intel CET is enabled, include <cet.h> in assembly code to mark
+ Intel CET support. */
+#ifdef __CET__
+# include <cet.h>
+#else
+# define _CET_ENDBR
+#endif
+
+/*
+ * On some systems, the functions need to be prefixed. The prefix is
+ * usually an underscore.
+ */
+#ifndef __USER_LABEL_PREFIX__
+# define __USER_LABEL_PREFIX__
+#endif
+#define MAKE_SYM_CAT(prefix, sym) prefix ## sym
+#define MAKE_SYM(prefix, sym) MAKE_SYM_CAT(prefix, sym)
+#define LZMA_CRC64 MAKE_SYM(__USER_LABEL_PREFIX__, lzma_crc64)
+#define LZMA_CRC64_TABLE MAKE_SYM(__USER_LABEL_PREFIX__, lzma_crc64_table)
+
+/*
+ * Solaris assembler doesn't have .p2align, and Darwin uses .align
+ * differently than GNU/Linux and Solaris.
+ */
+#if defined(__APPLE__) || defined(__MSDOS__)
+# define ALIGN(pow2, abs) .align pow2
+#else
+# define ALIGN(pow2, abs) .align abs
+#endif
+
+ .text
+ .globl LZMA_CRC64
+
+#if !defined(__APPLE__) && !defined(_WIN32) && !defined(__CYGWIN__) \
+ && !defined(__MSDOS__)
+ .type LZMA_CRC64, @function
+#endif
+
+ ALIGN(4, 16)
+LZMA_CRC64:
+ _CET_ENDBR
+ /*
+ * Register usage:
+ * %eax crc LSB
+ * %edx crc MSB
+ * %esi buf
+ * %edi size or buf + size
+ * %ebx lzma_crc64_table
+ * %ebp Table index
+ * %ecx Temporary
+ */
+ pushl %ebx
+ pushl %esi
+ pushl %edi
+ pushl %ebp
+ movl 0x14(%esp), %esi /* buf */
+ movl 0x18(%esp), %edi /* size */
+ movl 0x1C(%esp), %eax /* crc LSB */
+ movl 0x20(%esp), %edx /* crc MSB */
+
+ /*
+ * Store the address of lzma_crc64_table to %ebx. This is needed to
+ * get position-independent code (PIC).
+ *
+ * The PIC macro is defined by libtool, while __PIC__ is defined
+ * by GCC but only on some systems. Testing for both makes it simpler
+ * to test this code without libtool, and keeps the code working also
+ * when built with libtool but using something else than GCC.
+ *
+ * I understood that libtool may define PIC on Windows even though
+ * the code in Windows DLLs is not PIC in sense that it is in ELF
+ * binaries, so we need a separate check to always use the non-PIC
+ * code on Windows.
+ */
+#if (!defined(PIC) && !defined(__PIC__)) \
+ || (defined(_WIN32) || defined(__CYGWIN__))
+ /* Not PIC */
+ movl $ LZMA_CRC64_TABLE, %ebx
+#elif defined(__APPLE__)
+ /* Mach-O */
+ call .L_get_pc
+.L_pic:
+ leal .L_lzma_crc64_table$non_lazy_ptr-.L_pic(%ebx), %ebx
+ movl (%ebx), %ebx
+#else
+ /* ELF */
+ call .L_get_pc
+ addl $_GLOBAL_OFFSET_TABLE_, %ebx
+ movl LZMA_CRC64_TABLE@GOT(%ebx), %ebx
+#endif
+
+ /* Complement the initial value. */
+ notl %eax
+ notl %edx
+
+.L_align:
+ /*
+ * Check if there is enough input to use slicing-by-four.
+ * We need eight bytes, because the loop pre-reads four bytes.
+ */
+ cmpl $8, %edi
+ jb .L_rest
+
+ /* Check if we have reached alignment of four bytes. */
+ testl $3, %esi
+ jz .L_slice
+
+ /* Calculate CRC of the next input byte. */
+ movzbl (%esi), %ebp
+ incl %esi
+ movzbl %al, %ecx
+ xorl %ecx, %ebp
+ shrdl $8, %edx, %eax
+ xorl (%ebx, %ebp, 8), %eax
+ shrl $8, %edx
+ xorl 4(%ebx, %ebp, 8), %edx
+ decl %edi
+ jmp .L_align
+
+.L_slice:
+ /*
+ * If we get here, there's at least eight bytes of aligned input
+ * available. Make %edi multiple of four bytes. Store the possible
+ * remainder over the "size" variable in the argument stack.
+ */
+ movl %edi, 0x18(%esp)
+ andl $-4, %edi
+ subl %edi, 0x18(%esp)
+
+ /*
+ * Let %edi be buf + size - 4 while running the main loop. This way
+ * we can compare for equality to determine when exit the loop.
+ */
+ addl %esi, %edi
+ subl $4, %edi
+
+ /* Read in the first four aligned bytes. */
+ movl (%esi), %ecx
+
+.L_loop:
+ xorl %eax, %ecx
+ movzbl %cl, %ebp
+ movl 0x1800(%ebx, %ebp, 8), %eax
+ xorl %edx, %eax
+ movl 0x1804(%ebx, %ebp, 8), %edx
+ movzbl %ch, %ebp
+ xorl 0x1000(%ebx, %ebp, 8), %eax
+ xorl 0x1004(%ebx, %ebp, 8), %edx
+ shrl $16, %ecx
+ movzbl %cl, %ebp
+ xorl 0x0800(%ebx, %ebp, 8), %eax
+ xorl 0x0804(%ebx, %ebp, 8), %edx
+ movzbl %ch, %ebp
+ addl $4, %esi
+ xorl (%ebx, %ebp, 8), %eax
+ xorl 4(%ebx, %ebp, 8), %edx
+
+ /* Check for end of aligned input. */
+ cmpl %edi, %esi
+
+ /*
+ * Copy the next input byte to %ecx. It is slightly faster to
+ * read it here than at the top of the loop.
+ */
+ movl (%esi), %ecx
+ jb .L_loop
+
+ /*
+ * Process the remaining four bytes, which we have already
+ * copied to %ecx.
+ */
+ xorl %eax, %ecx
+ movzbl %cl, %ebp
+ movl 0x1800(%ebx, %ebp, 8), %eax
+ xorl %edx, %eax
+ movl 0x1804(%ebx, %ebp, 8), %edx
+ movzbl %ch, %ebp
+ xorl 0x1000(%ebx, %ebp, 8), %eax
+ xorl 0x1004(%ebx, %ebp, 8), %edx
+ shrl $16, %ecx
+ movzbl %cl, %ebp
+ xorl 0x0800(%ebx, %ebp, 8), %eax
+ xorl 0x0804(%ebx, %ebp, 8), %edx
+ movzbl %ch, %ebp
+ addl $4, %esi
+ xorl (%ebx, %ebp, 8), %eax
+ xorl 4(%ebx, %ebp, 8), %edx
+
+ /* Copy the number of remaining bytes to %edi. */
+ movl 0x18(%esp), %edi
+
+.L_rest:
+ /* Check for end of input. */
+ testl %edi, %edi
+ jz .L_return
+
+ /* Calculate CRC of the next input byte. */
+ movzbl (%esi), %ebp
+ incl %esi
+ movzbl %al, %ecx
+ xorl %ecx, %ebp
+ shrdl $8, %edx, %eax
+ xorl (%ebx, %ebp, 8), %eax
+ shrl $8, %edx
+ xorl 4(%ebx, %ebp, 8), %edx
+ decl %edi
+ jmp .L_rest
+
+.L_return:
+ /* Complement the final value. */
+ notl %eax
+ notl %edx
+
+ popl %ebp
+ popl %edi
+ popl %esi
+ popl %ebx
+ ret
+
+#if defined(PIC) || defined(__PIC__)
+ ALIGN(4, 16)
+.L_get_pc:
+ movl (%esp), %ebx
+ ret
+#endif
+
+#if defined(__APPLE__) && (defined(PIC) || defined(__PIC__))
+ /* Mach-O PIC */
+ .section __IMPORT,__pointers,non_lazy_symbol_pointers
+.L_lzma_crc64_table$non_lazy_ptr:
+ .indirect_symbol LZMA_CRC64_TABLE
+ .long 0
+
+#elif defined(_WIN32) || defined(__CYGWIN__)
+# ifdef DLL_EXPORT
+ /* This is equivalent of __declspec(dllexport). */
+ .section .drectve
+ .ascii " -export:lzma_crc64"
+# endif
+
+#elif !defined(__MSDOS__)
+ /* ELF */
+ .size LZMA_CRC64, .-LZMA_CRC64
+#endif
+
+/*
+ * This is needed to support non-executable stack. It's ugly to
+ * use __FreeBSD__ and __linux__ here, but I don't know a way to detect when
+ * we are using GNU assembler.
+ */
+#if defined(__ELF__) && (defined(__FreeBSD__) || defined(__linux__))
+ .section .note.GNU-stack,"",@progbits
+#endif
diff --git a/src/liblzma/check/crc_macros.h b/src/liblzma/check/crc_macros.h
new file mode 100644
index 0000000..a7c21b7
--- /dev/null
+++ b/src/liblzma/check/crc_macros.h
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file crc_macros.h
+/// \brief Some endian-dependent macros for CRC32 and CRC64
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifdef WORDS_BIGENDIAN
+# define A(x) ((x) >> 24)
+# define B(x) (((x) >> 16) & 0xFF)
+# define C(x) (((x) >> 8) & 0xFF)
+# define D(x) ((x) & 0xFF)
+
+# define S8(x) ((x) << 8)
+# define S32(x) ((x) << 32)
+
+#else
+# define A(x) ((x) & 0xFF)
+# define B(x) (((x) >> 8) & 0xFF)
+# define C(x) (((x) >> 16) & 0xFF)
+# define D(x) ((x) >> 24)
+
+# define S8(x) ((x) >> 8)
+# define S32(x) ((x) >> 32)
+#endif
diff --git a/src/liblzma/check/sha256.c b/src/liblzma/check/sha256.c
new file mode 100644
index 0000000..6feb342
--- /dev/null
+++ b/src/liblzma/check/sha256.c
@@ -0,0 +1,196 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file sha256.c
+/// \brief SHA-256
+///
+/// \todo Crypto++ has x86 ASM optimizations. They use SSE so if they
+/// are imported to liblzma, SSE instructions need to be used
+/// conditionally to keep the code working on older boxes.
+//
+// This code is based on the code found from 7-Zip, which has a modified
+// version of the SHA-256 found from Crypto++ <https://www.cryptopp.com/>.
+// The code was modified a little to fit into liblzma.
+//
+// Authors: Kevin Springle
+// Wei Dai
+// Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+// Rotate a uint32_t. GCC can optimize this to a rotate instruction
+// at least on x86.
+static inline uint32_t
+rotr_32(uint32_t num, unsigned amount)
+{
+ return (num >> amount) | (num << (32 - amount));
+}
+
+#define blk0(i) (W[i] = conv32be(data[i]))
+#define blk2(i) (W[i & 15] += s1(W[(i - 2) & 15]) + W[(i - 7) & 15] \
+ + s0(W[(i - 15) & 15]))
+
+#define Ch(x, y, z) (z ^ (x & (y ^ z)))
+#define Maj(x, y, z) ((x & (y ^ z)) + (y & z))
+
+#define a(i) T[(0 - i) & 7]
+#define b(i) T[(1 - i) & 7]
+#define c(i) T[(2 - i) & 7]
+#define d(i) T[(3 - i) & 7]
+#define e(i) T[(4 - i) & 7]
+#define f(i) T[(5 - i) & 7]
+#define g(i) T[(6 - i) & 7]
+#define h(i) T[(7 - i) & 7]
+
+#define R(i, j, blk) \
+ h(i) += S1(e(i)) + Ch(e(i), f(i), g(i)) + SHA256_K[i + j] + blk; \
+ d(i) += h(i); \
+ h(i) += S0(a(i)) + Maj(a(i), b(i), c(i))
+#define R0(i) R(i, 0, blk0(i))
+#define R2(i) R(i, j, blk2(i))
+
+#define S0(x) rotr_32(x ^ rotr_32(x ^ rotr_32(x, 9), 11), 2)
+#define S1(x) rotr_32(x ^ rotr_32(x ^ rotr_32(x, 14), 5), 6)
+#define s0(x) (rotr_32(x ^ rotr_32(x, 11), 7) ^ (x >> 3))
+#define s1(x) (rotr_32(x ^ rotr_32(x, 2), 17) ^ (x >> 10))
+
+
+static const uint32_t SHA256_K[64] = {
+ 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
+ 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
+ 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
+ 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
+ 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
+ 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
+ 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
+ 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
+ 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
+ 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
+ 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
+ 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
+ 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
+ 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
+ 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
+ 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
+};
+
+
+static void
+transform(uint32_t state[8], const uint32_t data[16])
+{
+ uint32_t W[16];
+ uint32_t T[8];
+
+ // Copy state[] to working vars.
+ memcpy(T, state, sizeof(T));
+
+ // The first 16 operations unrolled
+ R0( 0); R0( 1); R0( 2); R0( 3);
+ R0( 4); R0( 5); R0( 6); R0( 7);
+ R0( 8); R0( 9); R0(10); R0(11);
+ R0(12); R0(13); R0(14); R0(15);
+
+ // The remaining 48 operations partially unrolled
+ for (unsigned int j = 16; j < 64; j += 16) {
+ R2( 0); R2( 1); R2( 2); R2( 3);
+ R2( 4); R2( 5); R2( 6); R2( 7);
+ R2( 8); R2( 9); R2(10); R2(11);
+ R2(12); R2(13); R2(14); R2(15);
+ }
+
+ // Add the working vars back into state[].
+ state[0] += a(0);
+ state[1] += b(0);
+ state[2] += c(0);
+ state[3] += d(0);
+ state[4] += e(0);
+ state[5] += f(0);
+ state[6] += g(0);
+ state[7] += h(0);
+}
+
+
+static void
+process(lzma_check_state *check)
+{
+ transform(check->state.sha256.state, check->buffer.u32);
+ return;
+}
+
+
+extern void
+lzma_sha256_init(lzma_check_state *check)
+{
+ static const uint32_t s[8] = {
+ 0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A,
+ 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19,
+ };
+
+ memcpy(check->state.sha256.state, s, sizeof(s));
+ check->state.sha256.size = 0;
+
+ return;
+}
+
+
+extern void
+lzma_sha256_update(const uint8_t *buf, size_t size, lzma_check_state *check)
+{
+ // Copy the input data into a properly aligned temporary buffer.
+ // This way we can be called with arbitrarily sized buffers
+ // (no need to be multiple of 64 bytes), and the code works also
+ // on architectures that don't allow unaligned memory access.
+ while (size > 0) {
+ const size_t copy_start = check->state.sha256.size & 0x3F;
+ size_t copy_size = 64 - copy_start;
+ if (copy_size > size)
+ copy_size = size;
+
+ memcpy(check->buffer.u8 + copy_start, buf, copy_size);
+
+ buf += copy_size;
+ size -= copy_size;
+ check->state.sha256.size += copy_size;
+
+ if ((check->state.sha256.size & 0x3F) == 0)
+ process(check);
+ }
+
+ return;
+}
+
+
+extern void
+lzma_sha256_finish(lzma_check_state *check)
+{
+ // Add padding as described in RFC 3174 (it describes SHA-1 but
+ // the same padding style is used for SHA-256 too).
+ size_t pos = check->state.sha256.size & 0x3F;
+ check->buffer.u8[pos++] = 0x80;
+
+ while (pos != 64 - 8) {
+ if (pos == 64) {
+ process(check);
+ pos = 0;
+ }
+
+ check->buffer.u8[pos++] = 0x00;
+ }
+
+ // Convert the message size from bytes to bits.
+ check->state.sha256.size *= 8;
+
+ check->buffer.u64[(64 - 8) / 8] = conv64be(check->state.sha256.size);
+
+ process(check);
+
+ for (size_t i = 0; i < 8; ++i)
+ check->buffer.u32[i] = conv32be(check->state.sha256.state[i]);
+
+ return;
+}
diff --git a/src/liblzma/common/Makefile.inc b/src/liblzma/common/Makefile.inc
new file mode 100644
index 0000000..f0276a2
--- /dev/null
+++ b/src/liblzma/common/Makefile.inc
@@ -0,0 +1,104 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+liblzma_la_SOURCES += \
+ common/common.c \
+ common/common.h \
+ common/memcmplen.h \
+ common/block_util.c \
+ common/easy_preset.c \
+ common/easy_preset.h \
+ common/filter_common.c \
+ common/filter_common.h \
+ common/hardware_physmem.c \
+ common/index.c \
+ common/index.h \
+ common/stream_flags_common.c \
+ common/stream_flags_common.h \
+ common/string_conversion.c \
+ common/vli_size.c
+
+if COND_THREADS
+liblzma_la_SOURCES += \
+ common/hardware_cputhreads.c \
+ common/outqueue.c \
+ common/outqueue.h
+endif
+
+if COND_MAIN_ENCODER
+liblzma_la_SOURCES += \
+ common/alone_encoder.c \
+ common/block_buffer_encoder.c \
+ common/block_buffer_encoder.h \
+ common/block_encoder.c \
+ common/block_encoder.h \
+ common/block_header_encoder.c \
+ common/easy_buffer_encoder.c \
+ common/easy_encoder.c \
+ common/easy_encoder_memusage.c \
+ common/filter_buffer_encoder.c \
+ common/filter_encoder.c \
+ common/filter_encoder.h \
+ common/filter_flags_encoder.c \
+ common/index_encoder.c \
+ common/index_encoder.h \
+ common/stream_buffer_encoder.c \
+ common/stream_encoder.c \
+ common/stream_flags_encoder.c \
+ common/vli_encoder.c
+
+if COND_THREADS
+liblzma_la_SOURCES += \
+ common/stream_encoder_mt.c
+endif
+
+if COND_MICROLZMA
+liblzma_la_SOURCES += \
+ common/microlzma_encoder.c
+endif
+endif
+
+if COND_MAIN_DECODER
+liblzma_la_SOURCES += \
+ common/alone_decoder.c \
+ common/alone_decoder.h \
+ common/auto_decoder.c \
+ common/block_buffer_decoder.c \
+ common/block_decoder.c \
+ common/block_decoder.h \
+ common/block_header_decoder.c \
+ common/easy_decoder_memusage.c \
+ common/file_info.c \
+ common/filter_buffer_decoder.c \
+ common/filter_decoder.c \
+ common/filter_decoder.h \
+ common/filter_flags_decoder.c \
+ common/index_decoder.c \
+ common/index_decoder.h \
+ common/index_hash.c \
+ common/stream_buffer_decoder.c \
+ common/stream_decoder.c \
+ common/stream_decoder.h \
+ common/stream_flags_decoder.c \
+ common/vli_decoder.c
+
+if COND_THREADS
+liblzma_la_SOURCES += \
+ common/stream_decoder_mt.c
+endif
+
+if COND_MICROLZMA
+liblzma_la_SOURCES += \
+ common/microlzma_decoder.c
+endif
+
+if COND_LZIP_DECODER
+liblzma_la_SOURCES += \
+ common/lzip_decoder.c \
+ common/lzip_decoder.h
+endif
+endif
diff --git a/src/liblzma/common/alone_decoder.c b/src/liblzma/common/alone_decoder.c
new file mode 100644
index 0000000..1dc85ba
--- /dev/null
+++ b/src/liblzma/common/alone_decoder.c
@@ -0,0 +1,249 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file alone_decoder.c
+/// \brief Decoder for LZMA_Alone files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "alone_decoder.h"
+#include "lzma_decoder.h"
+#include "lz_decoder.h"
+
+
+typedef struct {
+ lzma_next_coder next;
+
+ enum {
+ SEQ_PROPERTIES,
+ SEQ_DICTIONARY_SIZE,
+ SEQ_UNCOMPRESSED_SIZE,
+ SEQ_CODER_INIT,
+ SEQ_CODE,
+ } sequence;
+
+ /// If true, reject files that are unlikely to be .lzma files.
+ /// If false, more non-.lzma files get accepted and will give
+ /// LZMA_DATA_ERROR either immediately or after a few output bytes.
+ bool picky;
+
+ /// Position in the header fields
+ size_t pos;
+
+ /// Uncompressed size decoded from the header
+ lzma_vli uncompressed_size;
+
+ /// Memory usage limit
+ uint64_t memlimit;
+
+ /// Amount of memory actually needed (only an estimate)
+ uint64_t memusage;
+
+ /// Options decoded from the header needed to initialize
+ /// the LZMA decoder
+ lzma_options_lzma options;
+} lzma_alone_coder;
+
+
+static lzma_ret
+alone_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size,
+ lzma_action action)
+{
+ lzma_alone_coder *coder = coder_ptr;
+
+ while (*out_pos < out_size
+ && (coder->sequence == SEQ_CODE || *in_pos < in_size))
+ switch (coder->sequence) {
+ case SEQ_PROPERTIES:
+ if (lzma_lzma_lclppb_decode(&coder->options, in[*in_pos]))
+ return LZMA_FORMAT_ERROR;
+
+ coder->sequence = SEQ_DICTIONARY_SIZE;
+ ++*in_pos;
+ break;
+
+ case SEQ_DICTIONARY_SIZE:
+ coder->options.dict_size
+ |= (size_t)(in[*in_pos]) << (coder->pos * 8);
+
+ if (++coder->pos == 4) {
+ if (coder->picky && coder->options.dict_size
+ != UINT32_MAX) {
+ // A hack to ditch tons of false positives:
+ // We allow only dictionary sizes that are
+ // 2^n or 2^n + 2^(n-1). LZMA_Alone created
+ // only files with 2^n, but accepts any
+ // dictionary size.
+ uint32_t d = coder->options.dict_size - 1;
+ d |= d >> 2;
+ d |= d >> 3;
+ d |= d >> 4;
+ d |= d >> 8;
+ d |= d >> 16;
+ ++d;
+
+ if (d != coder->options.dict_size)
+ return LZMA_FORMAT_ERROR;
+ }
+
+ coder->pos = 0;
+ coder->sequence = SEQ_UNCOMPRESSED_SIZE;
+ }
+
+ ++*in_pos;
+ break;
+
+ case SEQ_UNCOMPRESSED_SIZE:
+ coder->uncompressed_size
+ |= (lzma_vli)(in[*in_pos]) << (coder->pos * 8);
+ ++*in_pos;
+ if (++coder->pos < 8)
+ break;
+
+ // Another hack to ditch false positives: Assume that
+ // if the uncompressed size is known, it must be less
+ // than 256 GiB.
+ //
+ // FIXME? Without picky we allow > LZMA_VLI_MAX which doesn't
+ // really matter in this specific situation (> LZMA_VLI_MAX is
+ // safe in the LZMA decoder) but it's somewhat weird still.
+ if (coder->picky
+ && coder->uncompressed_size != LZMA_VLI_UNKNOWN
+ && coder->uncompressed_size
+ >= (LZMA_VLI_C(1) << 38))
+ return LZMA_FORMAT_ERROR;
+
+ // Use LZMA_FILTER_LZMA1EXT features to specify the
+ // uncompressed size and that the end marker is allowed
+ // even when the uncompressed size is known. Both .lzma
+ // header and LZMA1EXT use UINT64_MAX indicate that size
+ // is unknown.
+ coder->options.ext_flags = LZMA_LZMA1EXT_ALLOW_EOPM;
+ lzma_set_ext_size(coder->options, coder->uncompressed_size);
+
+ // Calculate the memory usage so that it is ready
+ // for SEQ_CODER_INIT.
+ coder->memusage = lzma_lzma_decoder_memusage(&coder->options)
+ + LZMA_MEMUSAGE_BASE;
+
+ coder->pos = 0;
+ coder->sequence = SEQ_CODER_INIT;
+
+ // Fall through
+
+ case SEQ_CODER_INIT: {
+ if (coder->memusage > coder->memlimit)
+ return LZMA_MEMLIMIT_ERROR;
+
+ lzma_filter_info filters[2] = {
+ {
+ .id = LZMA_FILTER_LZMA1EXT,
+ .init = &lzma_lzma_decoder_init,
+ .options = &coder->options,
+ }, {
+ .init = NULL,
+ }
+ };
+
+ return_if_error(lzma_next_filter_init(&coder->next,
+ allocator, filters));
+
+ coder->sequence = SEQ_CODE;
+ break;
+ }
+
+ case SEQ_CODE: {
+ return coder->next.code(coder->next.coder,
+ allocator, in, in_pos, in_size,
+ out, out_pos, out_size, action);
+ }
+
+ default:
+ return LZMA_PROG_ERROR;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+alone_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_alone_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+alone_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_alone_coder *coder = coder_ptr;
+
+ *memusage = coder->memusage;
+ *old_memlimit = coder->memlimit;
+
+ if (new_memlimit != 0) {
+ if (new_memlimit < coder->memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ coder->memlimit = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_alone_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, bool picky)
+{
+ lzma_next_coder_init(&lzma_alone_decoder_init, next, allocator);
+
+ lzma_alone_coder *coder = next->coder;
+
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_alone_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &alone_decode;
+ next->end = &alone_decoder_end;
+ next->memconfig = &alone_decoder_memconfig;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ coder->sequence = SEQ_PROPERTIES;
+ coder->picky = picky;
+ coder->pos = 0;
+ coder->options.dict_size = 0;
+ coder->options.preset_dict = NULL;
+ coder->options.preset_dict_size = 0;
+ coder->uncompressed_size = 0;
+ coder->memlimit = my_max(1, memlimit);
+ coder->memusage = LZMA_MEMUSAGE_BASE;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_alone_decoder(lzma_stream *strm, uint64_t memlimit)
+{
+ lzma_next_strm_init(lzma_alone_decoder_init, strm, memlimit, false);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/alone_decoder.h b/src/liblzma/common/alone_decoder.h
new file mode 100644
index 0000000..dfa031a
--- /dev/null
+++ b/src/liblzma/common/alone_decoder.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file alone_decoder.h
+/// \brief Decoder for LZMA_Alone files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_ALONE_DECODER_H
+#define LZMA_ALONE_DECODER_H
+
+#include "common.h"
+
+
+extern lzma_ret lzma_alone_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, bool picky);
+
+#endif
diff --git a/src/liblzma/common/alone_encoder.c b/src/liblzma/common/alone_encoder.c
new file mode 100644
index 0000000..7d3812f
--- /dev/null
+++ b/src/liblzma/common/alone_encoder.c
@@ -0,0 +1,152 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file alone_encoder.c
+/// \brief Encoder for LZMA_Alone files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "lzma_encoder.h"
+
+
+#define ALONE_HEADER_SIZE (1 + 4 + 8)
+
+
+typedef struct {
+ lzma_next_coder next;
+
+ enum {
+ SEQ_HEADER,
+ SEQ_CODE,
+ } sequence;
+
+ size_t header_pos;
+ uint8_t header[ALONE_HEADER_SIZE];
+} lzma_alone_coder;
+
+
+static lzma_ret
+alone_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size,
+ lzma_action action)
+{
+ lzma_alone_coder *coder = coder_ptr;
+
+ while (*out_pos < out_size)
+ switch (coder->sequence) {
+ case SEQ_HEADER:
+ lzma_bufcpy(coder->header, &coder->header_pos,
+ ALONE_HEADER_SIZE,
+ out, out_pos, out_size);
+ if (coder->header_pos < ALONE_HEADER_SIZE)
+ return LZMA_OK;
+
+ coder->sequence = SEQ_CODE;
+ break;
+
+ case SEQ_CODE:
+ return coder->next.code(coder->next.coder,
+ allocator, in, in_pos, in_size,
+ out, out_pos, out_size, action);
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+alone_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_alone_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+alone_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_options_lzma *options)
+{
+ lzma_next_coder_init(&alone_encoder_init, next, allocator);
+
+ lzma_alone_coder *coder = next->coder;
+
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_alone_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &alone_encode;
+ next->end = &alone_encoder_end;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Basic initializations
+ coder->sequence = SEQ_HEADER;
+ coder->header_pos = 0;
+
+ // Encode the header:
+ // - Properties (1 byte)
+ if (lzma_lzma_lclppb_encode(options, coder->header))
+ return LZMA_OPTIONS_ERROR;
+
+ // - Dictionary size (4 bytes)
+ if (options->dict_size < LZMA_DICT_SIZE_MIN)
+ return LZMA_OPTIONS_ERROR;
+
+ // Round up to the next 2^n or 2^n + 2^(n - 1) depending on which
+ // one is the next unless it is UINT32_MAX. While the header would
+ // allow any 32-bit integer, we do this to keep the decoder of liblzma
+ // accepting the resulting files.
+ uint32_t d = options->dict_size - 1;
+ d |= d >> 2;
+ d |= d >> 3;
+ d |= d >> 4;
+ d |= d >> 8;
+ d |= d >> 16;
+ if (d != UINT32_MAX)
+ ++d;
+
+ write32le(coder->header + 1, d);
+
+ // - Uncompressed size (always unknown and using EOPM)
+ memset(coder->header + 1 + 4, 0xFF, 8);
+
+ // Initialize the LZMA encoder.
+ const lzma_filter_info filters[2] = {
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .init = &lzma_lzma_encoder_init,
+ .options = (void *)(options),
+ }, {
+ .init = NULL,
+ }
+ };
+
+ return lzma_next_filter_init(&coder->next, allocator, filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_alone_encoder(lzma_stream *strm, const lzma_options_lzma *options)
+{
+ lzma_next_strm_init(alone_encoder_init, strm, options);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/auto_decoder.c b/src/liblzma/common/auto_decoder.c
new file mode 100644
index 0000000..2a5c089
--- /dev/null
+++ b/src/liblzma/common/auto_decoder.c
@@ -0,0 +1,206 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file auto_decoder.c
+/// \brief Autodetect between .xz, .lzma (LZMA_Alone), and .lz (lzip)
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_decoder.h"
+#include "alone_decoder.h"
+#ifdef HAVE_LZIP_DECODER
+# include "lzip_decoder.h"
+#endif
+
+
+typedef struct {
+ /// .xz Stream decoder, LZMA_Alone decoder, or lzip decoder
+ lzma_next_coder next;
+
+ uint64_t memlimit;
+ uint32_t flags;
+
+ enum {
+ SEQ_INIT,
+ SEQ_CODE,
+ SEQ_FINISH,
+ } sequence;
+} lzma_auto_coder;
+
+
+static lzma_ret
+auto_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_auto_coder *coder = coder_ptr;
+
+ switch (coder->sequence) {
+ case SEQ_INIT:
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ // Update the sequence now, because we want to continue from
+ // SEQ_CODE even if we return some LZMA_*_CHECK.
+ coder->sequence = SEQ_CODE;
+
+ // Detect the file format. .xz files start with 0xFD which
+ // cannot be the first byte of .lzma (LZMA_Alone) format.
+ // The .lz format starts with 0x4C which could be the
+ // first byte of a .lzma file but luckily it would mean
+ // lc/lp/pb being 4/3/1 which liblzma doesn't support because
+ // lc + lp > 4. So using just 0x4C to detect .lz is OK here.
+ if (in[*in_pos] == 0xFD) {
+ return_if_error(lzma_stream_decoder_init(
+ &coder->next, allocator,
+ coder->memlimit, coder->flags));
+#ifdef HAVE_LZIP_DECODER
+ } else if (in[*in_pos] == 0x4C) {
+ return_if_error(lzma_lzip_decoder_init(
+ &coder->next, allocator,
+ coder->memlimit, coder->flags));
+#endif
+ } else {
+ return_if_error(lzma_alone_decoder_init(&coder->next,
+ allocator, coder->memlimit, true));
+
+ // If the application wants to know about missing
+ // integrity check or about the check in general, we
+ // need to handle it here, because LZMA_Alone decoder
+ // doesn't accept any flags.
+ if (coder->flags & LZMA_TELL_NO_CHECK)
+ return LZMA_NO_CHECK;
+
+ if (coder->flags & LZMA_TELL_ANY_CHECK)
+ return LZMA_GET_CHECK;
+ }
+
+ // Fall through
+
+ case SEQ_CODE: {
+ const lzma_ret ret = coder->next.code(
+ coder->next.coder, allocator,
+ in, in_pos, in_size,
+ out, out_pos, out_size, action);
+ if (ret != LZMA_STREAM_END
+ || (coder->flags & LZMA_CONCATENATED) == 0)
+ return ret;
+
+ coder->sequence = SEQ_FINISH;
+ }
+
+ // Fall through
+
+ case SEQ_FINISH:
+ // When LZMA_CONCATENATED was used and we were decoding
+ // a LZMA_Alone file, we need to check that there is no
+ // trailing garbage and wait for LZMA_FINISH.
+ if (*in_pos < in_size)
+ return LZMA_DATA_ERROR;
+
+ return action == LZMA_FINISH ? LZMA_STREAM_END : LZMA_OK;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+}
+
+
+static void
+auto_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_auto_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_check
+auto_decoder_get_check(const void *coder_ptr)
+{
+ const lzma_auto_coder *coder = coder_ptr;
+
+ // It is LZMA_Alone if get_check is NULL.
+ return coder->next.get_check == NULL ? LZMA_CHECK_NONE
+ : coder->next.get_check(coder->next.coder);
+}
+
+
+static lzma_ret
+auto_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_auto_coder *coder = coder_ptr;
+
+ lzma_ret ret;
+
+ if (coder->next.memconfig != NULL) {
+ ret = coder->next.memconfig(coder->next.coder,
+ memusage, old_memlimit, new_memlimit);
+ assert(*old_memlimit == coder->memlimit);
+ } else {
+ // No coder is configured yet. Use the base value as
+ // the current memory usage.
+ *memusage = LZMA_MEMUSAGE_BASE;
+ *old_memlimit = coder->memlimit;
+
+ ret = LZMA_OK;
+ if (new_memlimit != 0 && new_memlimit < *memusage)
+ ret = LZMA_MEMLIMIT_ERROR;
+ }
+
+ if (ret == LZMA_OK && new_memlimit != 0)
+ coder->memlimit = new_memlimit;
+
+ return ret;
+}
+
+
+static lzma_ret
+auto_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_coder_init(&auto_decoder_init, next, allocator);
+
+ if (flags & ~LZMA_SUPPORTED_FLAGS)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_auto_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_auto_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &auto_decode;
+ next->end = &auto_decoder_end;
+ next->get_check = &auto_decoder_get_check;
+ next->memconfig = &auto_decoder_memconfig;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ coder->memlimit = my_max(1, memlimit);
+ coder->flags = flags;
+ coder->sequence = SEQ_INIT;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_auto_decoder(lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_strm_init(auto_decoder_init, strm, memlimit, flags);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/block_buffer_decoder.c b/src/liblzma/common/block_buffer_decoder.c
new file mode 100644
index 0000000..b0ded90
--- /dev/null
+++ b/src/liblzma/common/block_buffer_decoder.c
@@ -0,0 +1,80 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_buffer_decoder.c
+/// \brief Single-call .xz Block decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "block_decoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_buffer_decode(lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ if (in_pos == NULL || (in == NULL && *in_pos != in_size)
+ || *in_pos > in_size || out_pos == NULL
+ || (out == NULL && *out_pos != out_size)
+ || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the Block decoder.
+ lzma_next_coder block_decoder = LZMA_NEXT_CODER_INIT;
+ lzma_ret ret = lzma_block_decoder_init(
+ &block_decoder, allocator, block);
+
+ if (ret == LZMA_OK) {
+ // Save the positions so that we can restore them in case
+ // an error occurs.
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ // Do the actual decoding.
+ ret = block_decoder.code(block_decoder.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ LZMA_FINISH);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ if (ret == LZMA_OK) {
+ // Either the input was truncated or the
+ // output buffer was too small.
+ assert(*in_pos == in_size
+ || *out_pos == out_size);
+
+ // If all the input was consumed, then the
+ // input is truncated, even if the output
+ // buffer is also full. This is because
+ // processing the last byte of the Block
+ // never produces output.
+ //
+ // NOTE: This assumption may break when new
+ // filters are added, if the end marker of
+ // the filter doesn't consume at least one
+ // complete byte.
+ if (*in_pos == in_size)
+ ret = LZMA_DATA_ERROR;
+ else
+ ret = LZMA_BUF_ERROR;
+ }
+
+ // Restore the positions.
+ *in_pos = in_start;
+ *out_pos = out_start;
+ }
+ }
+
+ // Free the decoder memory. This needs to be done even if
+ // initialization fails, because the internal API doesn't
+ // require the initialization function to free its memory on error.
+ lzma_next_end(&block_decoder, allocator);
+
+ return ret;
+}
diff --git a/src/liblzma/common/block_buffer_encoder.c b/src/liblzma/common/block_buffer_encoder.c
new file mode 100644
index 0000000..fdef02d
--- /dev/null
+++ b/src/liblzma/common/block_buffer_encoder.c
@@ -0,0 +1,355 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_buffer_encoder.c
+/// \brief Single-call .xz Block encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "block_buffer_encoder.h"
+#include "block_encoder.h"
+#include "filter_encoder.h"
+#include "lzma2_encoder.h"
+#include "check.h"
+
+
+/// Estimate the maximum size of the Block Header and Check fields for
+/// a Block that uses LZMA2 uncompressed chunks. We could use
+/// lzma_block_header_size() but this is simpler.
+///
+/// Block Header Size + Block Flags + Compressed Size
+/// + Uncompressed Size + Filter Flags for LZMA2 + CRC32 + Check
+/// and round up to the next multiple of four to take Header Padding
+/// into account.
+#define HEADERS_BOUND ((1 + 1 + 2 * LZMA_VLI_BYTES_MAX + 3 + 4 \
+ + LZMA_CHECK_SIZE_MAX + 3) & ~3)
+
+
+static uint64_t
+lzma2_bound(uint64_t uncompressed_size)
+{
+ // Prevent integer overflow in overhead calculation.
+ if (uncompressed_size > COMPRESSED_SIZE_MAX)
+ return 0;
+
+ // Calculate the exact overhead of the LZMA2 headers: Round
+ // uncompressed_size up to the next multiple of LZMA2_CHUNK_MAX,
+ // multiply by the size of per-chunk header, and add one byte for
+ // the end marker.
+ const uint64_t overhead = ((uncompressed_size + LZMA2_CHUNK_MAX - 1)
+ / LZMA2_CHUNK_MAX)
+ * LZMA2_HEADER_UNCOMPRESSED + 1;
+
+ // Catch the possible integer overflow.
+ if (COMPRESSED_SIZE_MAX - overhead < uncompressed_size)
+ return 0;
+
+ return uncompressed_size + overhead;
+}
+
+
+extern uint64_t
+lzma_block_buffer_bound64(uint64_t uncompressed_size)
+{
+ // If the data doesn't compress, we always use uncompressed
+ // LZMA2 chunks.
+ uint64_t lzma2_size = lzma2_bound(uncompressed_size);
+ if (lzma2_size == 0)
+ return 0;
+
+ // Take Block Padding into account.
+ lzma2_size = (lzma2_size + 3) & ~UINT64_C(3);
+
+ // No risk of integer overflow because lzma2_bound() already takes
+ // into account the size of the headers in the Block.
+ return HEADERS_BOUND + lzma2_size;
+}
+
+
+extern LZMA_API(size_t)
+lzma_block_buffer_bound(size_t uncompressed_size)
+{
+ uint64_t ret = lzma_block_buffer_bound64(uncompressed_size);
+
+#if SIZE_MAX < UINT64_MAX
+ // Catch the possible integer overflow on 32-bit systems.
+ if (ret > SIZE_MAX)
+ return 0;
+#endif
+
+ return ret;
+}
+
+
+static lzma_ret
+block_encode_uncompressed(lzma_block *block, const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Use LZMA2 uncompressed chunks. We wouldn't need a dictionary at
+ // all, but LZMA2 always requires a dictionary, so use the minimum
+ // value to minimize memory usage of the decoder.
+ lzma_options_lzma lzma2 = {
+ .dict_size = LZMA_DICT_SIZE_MIN,
+ };
+
+ lzma_filter filters[2];
+ filters[0].id = LZMA_FILTER_LZMA2;
+ filters[0].options = &lzma2;
+ filters[1].id = LZMA_VLI_UNKNOWN;
+
+ // Set the above filter options to *block temporarily so that we can
+ // encode the Block Header.
+ lzma_filter *filters_orig = block->filters;
+ block->filters = filters;
+
+ if (lzma_block_header_size(block) != LZMA_OK) {
+ block->filters = filters_orig;
+ return LZMA_PROG_ERROR;
+ }
+
+ // Check that there's enough output space. The caller has already
+ // set block->compressed_size to what lzma2_bound() has returned,
+ // so we can reuse that value. We know that compressed_size is a
+ // known valid VLI and header_size is a small value so their sum
+ // will never overflow.
+ assert(block->compressed_size == lzma2_bound(in_size));
+ if (out_size - *out_pos
+ < block->header_size + block->compressed_size) {
+ block->filters = filters_orig;
+ return LZMA_BUF_ERROR;
+ }
+
+ if (lzma_block_header_encode(block, out + *out_pos) != LZMA_OK) {
+ block->filters = filters_orig;
+ return LZMA_PROG_ERROR;
+ }
+
+ block->filters = filters_orig;
+ *out_pos += block->header_size;
+
+ // Encode the data using LZMA2 uncompressed chunks.
+ size_t in_pos = 0;
+ uint8_t control = 0x01; // Dictionary reset
+
+ while (in_pos < in_size) {
+ // Control byte: Indicate uncompressed chunk, of which
+ // the first resets the dictionary.
+ out[(*out_pos)++] = control;
+ control = 0x02; // No dictionary reset
+
+ // Size of the uncompressed chunk
+ const size_t copy_size
+ = my_min(in_size - in_pos, LZMA2_CHUNK_MAX);
+ out[(*out_pos)++] = (copy_size - 1) >> 8;
+ out[(*out_pos)++] = (copy_size - 1) & 0xFF;
+
+ // The actual data
+ assert(*out_pos + copy_size <= out_size);
+ memcpy(out + *out_pos, in + in_pos, copy_size);
+
+ in_pos += copy_size;
+ *out_pos += copy_size;
+ }
+
+ // End marker
+ out[(*out_pos)++] = 0x00;
+ assert(*out_pos <= out_size);
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+block_encode_normal(lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Find out the size of the Block Header.
+ return_if_error(lzma_block_header_size(block));
+
+ // Reserve space for the Block Header and skip it for now.
+ if (out_size - *out_pos <= block->header_size)
+ return LZMA_BUF_ERROR;
+
+ const size_t out_start = *out_pos;
+ *out_pos += block->header_size;
+
+ // Limit out_size so that we stop encoding if the output would grow
+ // bigger than what uncompressed Block would be.
+ if (out_size - *out_pos > block->compressed_size)
+ out_size = *out_pos + block->compressed_size;
+
+ // TODO: In many common cases this could be optimized to use
+ // significantly less memory.
+ lzma_next_coder raw_encoder = LZMA_NEXT_CODER_INIT;
+ lzma_ret ret = lzma_raw_encoder_init(
+ &raw_encoder, allocator, block->filters);
+
+ if (ret == LZMA_OK) {
+ size_t in_pos = 0;
+ ret = raw_encoder.code(raw_encoder.coder, allocator,
+ in, &in_pos, in_size, out, out_pos, out_size,
+ LZMA_FINISH);
+ }
+
+ // NOTE: This needs to be run even if lzma_raw_encoder_init() failed.
+ lzma_next_end(&raw_encoder, allocator);
+
+ if (ret == LZMA_STREAM_END) {
+ // Compression was successful. Write the Block Header.
+ block->compressed_size
+ = *out_pos - (out_start + block->header_size);
+ ret = lzma_block_header_encode(block, out + out_start);
+ if (ret != LZMA_OK)
+ ret = LZMA_PROG_ERROR;
+
+ } else if (ret == LZMA_OK) {
+ // Output buffer became full.
+ ret = LZMA_BUF_ERROR;
+ }
+
+ // Reset *out_pos if something went wrong.
+ if (ret != LZMA_OK)
+ *out_pos = out_start;
+
+ return ret;
+}
+
+
+static lzma_ret
+block_buffer_encode(lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size,
+ bool try_to_compress)
+{
+ // Validate the arguments.
+ if (block == NULL || (in == NULL && in_size != 0) || out == NULL
+ || out_pos == NULL || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // The contents of the structure may depend on the version so
+ // check the version before validating the contents of *block.
+ if (block->version > 1)
+ return LZMA_OPTIONS_ERROR;
+
+ if ((unsigned int)(block->check) > LZMA_CHECK_ID_MAX
+ || (try_to_compress && block->filters == NULL))
+ return LZMA_PROG_ERROR;
+
+ if (!lzma_check_is_supported(block->check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ // Size of a Block has to be a multiple of four, so limit the size
+ // here already. This way we don't need to check it again when adding
+ // Block Padding.
+ out_size -= (out_size - *out_pos) & 3;
+
+ // Get the size of the Check field.
+ const size_t check_size = lzma_check_size(block->check);
+ assert(check_size != UINT32_MAX);
+
+ // Reserve space for the Check field.
+ if (out_size - *out_pos <= check_size)
+ return LZMA_BUF_ERROR;
+
+ out_size -= check_size;
+
+ // Initialize block->uncompressed_size and calculate the worst-case
+ // value for block->compressed_size.
+ block->uncompressed_size = in_size;
+ block->compressed_size = lzma2_bound(in_size);
+ if (block->compressed_size == 0)
+ return LZMA_DATA_ERROR;
+
+ // Do the actual compression.
+ lzma_ret ret = LZMA_BUF_ERROR;
+ if (try_to_compress)
+ ret = block_encode_normal(block, allocator,
+ in, in_size, out, out_pos, out_size);
+
+ if (ret != LZMA_OK) {
+ // If the error was something else than output buffer
+ // becoming full, return the error now.
+ if (ret != LZMA_BUF_ERROR)
+ return ret;
+
+ // The data was incompressible (at least with the options
+ // given to us) or the output buffer was too small. Use the
+ // uncompressed chunks of LZMA2 to wrap the data into a valid
+ // Block. If we haven't been given enough output space, even
+ // this may fail.
+ return_if_error(block_encode_uncompressed(block, in, in_size,
+ out, out_pos, out_size));
+ }
+
+ assert(*out_pos <= out_size);
+
+ // Block Padding. No buffer overflow here, because we already adjusted
+ // out_size so that (out_size - out_start) is a multiple of four.
+ // Thus, if the buffer is full, the loop body can never run.
+ for (size_t i = (size_t)(block->compressed_size); i & 3; ++i) {
+ assert(*out_pos < out_size);
+ out[(*out_pos)++] = 0x00;
+ }
+
+ // If there's no Check field, we are done now.
+ if (check_size > 0) {
+ // Calculate the integrity check. We reserved space for
+ // the Check field earlier so we don't need to check for
+ // available output space here.
+ lzma_check_state check;
+ lzma_check_init(&check, block->check);
+ lzma_check_update(&check, block->check, in, in_size);
+ lzma_check_finish(&check, block->check);
+
+ memcpy(block->raw_check, check.buffer.u8, check_size);
+ memcpy(out + *out_pos, check.buffer.u8, check_size);
+ *out_pos += check_size;
+ }
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_buffer_encode(lzma_block *block, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ return block_buffer_encode(block, allocator,
+ in, in_size, out, out_pos, out_size, true);
+}
+
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+// This is for compatibility with binaries linked against liblzma that
+// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
+LZMA_SYMVER_API("lzma_block_uncomp_encode@XZ_5.2.2",
+ lzma_ret, lzma_block_uncomp_encode_522)(lzma_block *block,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result
+ __attribute__((__alias__("lzma_block_uncomp_encode_52")));
+
+LZMA_SYMVER_API("lzma_block_uncomp_encode@@XZ_5.2",
+ lzma_ret, lzma_block_uncomp_encode_52)(lzma_block *block,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+#define lzma_block_uncomp_encode lzma_block_uncomp_encode_52
+#endif
+extern LZMA_API(lzma_ret)
+lzma_block_uncomp_encode(lzma_block *block,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // It won't allocate any memory from heap so no need
+ // for lzma_allocator.
+ return block_buffer_encode(block, NULL,
+ in, in_size, out, out_pos, out_size, false);
+}
diff --git a/src/liblzma/common/block_buffer_encoder.h b/src/liblzma/common/block_buffer_encoder.h
new file mode 100644
index 0000000..653207f
--- /dev/null
+++ b/src/liblzma/common/block_buffer_encoder.h
@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_buffer_encoder.h
+/// \brief Single-call .xz Block encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_BLOCK_BUFFER_ENCODER_H
+#define LZMA_BLOCK_BUFFER_ENCODER_H
+
+#include "common.h"
+
+
+/// uint64_t version of lzma_block_buffer_bound(). It is used by
+/// stream_encoder_mt.c. Probably the original lzma_block_buffer_bound()
+/// should have been 64-bit, but fixing it would break the ABI.
+extern uint64_t lzma_block_buffer_bound64(uint64_t uncompressed_size);
+
+#endif
diff --git a/src/liblzma/common/block_decoder.c b/src/liblzma/common/block_decoder.c
new file mode 100644
index 0000000..be647d4
--- /dev/null
+++ b/src/liblzma/common/block_decoder.c
@@ -0,0 +1,289 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_decoder.c
+/// \brief Decodes .xz Blocks
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "block_decoder.h"
+#include "filter_decoder.h"
+#include "check.h"
+
+
+typedef struct {
+ enum {
+ SEQ_CODE,
+ SEQ_PADDING,
+ SEQ_CHECK,
+ } sequence;
+
+ /// The filters in the chain; initialized with lzma_raw_decoder_init().
+ lzma_next_coder next;
+
+ /// Decoding options; we also write Compressed Size and Uncompressed
+ /// Size back to this structure when the decoding has been finished.
+ lzma_block *block;
+
+ /// Compressed Size calculated while decoding
+ lzma_vli compressed_size;
+
+ /// Uncompressed Size calculated while decoding
+ lzma_vli uncompressed_size;
+
+ /// Maximum allowed Compressed Size; this takes into account the
+ /// size of the Block Header and Check fields when Compressed Size
+ /// is unknown.
+ lzma_vli compressed_limit;
+
+ /// Maximum allowed Uncompressed Size.
+ lzma_vli uncompressed_limit;
+
+ /// Position when reading the Check field
+ size_t check_pos;
+
+ /// Check of the uncompressed data
+ lzma_check_state check;
+
+ /// True if the integrity check won't be calculated and verified.
+ bool ignore_check;
+} lzma_block_coder;
+
+
+static inline bool
+is_size_valid(lzma_vli size, lzma_vli reference)
+{
+ return reference == LZMA_VLI_UNKNOWN || reference == size;
+}
+
+
+static lzma_ret
+block_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_block_coder *coder = coder_ptr;
+
+ switch (coder->sequence) {
+ case SEQ_CODE: {
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ // Limit the amount of input and output space that we give
+ // to the raw decoder based on the information we have
+ // (or don't have) from Block Header.
+ const size_t in_stop = *in_pos + (size_t)my_min(
+ in_size - *in_pos,
+ coder->compressed_limit - coder->compressed_size);
+ const size_t out_stop = *out_pos + (size_t)my_min(
+ out_size - *out_pos,
+ coder->uncompressed_limit - coder->uncompressed_size);
+
+ const lzma_ret ret = coder->next.code(coder->next.coder,
+ allocator, in, in_pos, in_stop,
+ out, out_pos, out_stop, action);
+
+ const size_t in_used = *in_pos - in_start;
+ const size_t out_used = *out_pos - out_start;
+
+ // Because we have limited the input and output sizes,
+ // we know that these cannot grow too big or overflow.
+ coder->compressed_size += in_used;
+ coder->uncompressed_size += out_used;
+
+ if (ret == LZMA_OK) {
+ const bool comp_done = coder->compressed_size
+ == coder->block->compressed_size;
+ const bool uncomp_done = coder->uncompressed_size
+ == coder->block->uncompressed_size;
+
+ // If both input and output amounts match the sizes
+ // in Block Header but we still got LZMA_OK instead
+ // of LZMA_STREAM_END, the file is broken.
+ if (comp_done && uncomp_done)
+ return LZMA_DATA_ERROR;
+
+ // If the decoder has consumed all the input that it
+ // needs but it still couldn't fill the output buffer
+ // or return LZMA_STREAM_END, the file is broken.
+ if (comp_done && *out_pos < out_size)
+ return LZMA_DATA_ERROR;
+
+ // If the decoder has produced all the output but
+ // it still didn't return LZMA_STREAM_END or consume
+ // more input (for example, detecting an end of
+ // payload marker may need more input but produce
+ // no output) the file is broken.
+ if (uncomp_done && *in_pos < in_size)
+ return LZMA_DATA_ERROR;
+ }
+
+ // Don't waste time updating the integrity check if it will be
+ // ignored. Also skip it if no new output was produced. This
+ // avoids null pointer + 0 (undefined behavior) when out == 0.
+ if (!coder->ignore_check && out_used > 0)
+ lzma_check_update(&coder->check, coder->block->check,
+ out + out_start, out_used);
+
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // Compressed and Uncompressed Sizes are now at their final
+ // values. Verify that they match the values given to us.
+ if (!is_size_valid(coder->compressed_size,
+ coder->block->compressed_size)
+ || !is_size_valid(coder->uncompressed_size,
+ coder->block->uncompressed_size))
+ return LZMA_DATA_ERROR;
+
+ // Copy the values into coder->block. The caller
+ // may use this information to construct Index.
+ coder->block->compressed_size = coder->compressed_size;
+ coder->block->uncompressed_size = coder->uncompressed_size;
+
+ coder->sequence = SEQ_PADDING;
+ }
+
+ // Fall through
+
+ case SEQ_PADDING:
+ // Compressed Data is padded to a multiple of four bytes.
+ while (coder->compressed_size & 3) {
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ // We use compressed_size here just get the Padding
+ // right. The actual Compressed Size was stored to
+ // coder->block already, and won't be modified by
+ // us anymore.
+ ++coder->compressed_size;
+
+ if (in[(*in_pos)++] != 0x00)
+ return LZMA_DATA_ERROR;
+ }
+
+ if (coder->block->check == LZMA_CHECK_NONE)
+ return LZMA_STREAM_END;
+
+ if (!coder->ignore_check)
+ lzma_check_finish(&coder->check, coder->block->check);
+
+ coder->sequence = SEQ_CHECK;
+
+ // Fall through
+
+ case SEQ_CHECK: {
+ const size_t check_size = lzma_check_size(coder->block->check);
+ lzma_bufcpy(in, in_pos, in_size, coder->block->raw_check,
+ &coder->check_pos, check_size);
+ if (coder->check_pos < check_size)
+ return LZMA_OK;
+
+ // Validate the Check only if we support it.
+ // coder->check.buffer may be uninitialized
+ // when the Check ID is not supported.
+ if (!coder->ignore_check
+ && lzma_check_is_supported(coder->block->check)
+ && memcmp(coder->block->raw_check,
+ coder->check.buffer.u8,
+ check_size) != 0)
+ return LZMA_DATA_ERROR;
+
+ return LZMA_STREAM_END;
+ }
+ }
+
+ return LZMA_PROG_ERROR;
+}
+
+
+static void
+block_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_block_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+extern lzma_ret
+lzma_block_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ lzma_block *block)
+{
+ lzma_next_coder_init(&lzma_block_decoder_init, next, allocator);
+
+ // Validate the options. lzma_block_unpadded_size() does that for us
+ // except for Uncompressed Size and filters. Filters are validated
+ // by the raw decoder.
+ if (lzma_block_unpadded_size(block) == 0
+ || !lzma_vli_is_valid(block->uncompressed_size))
+ return LZMA_PROG_ERROR;
+
+ // Allocate *next->coder if needed.
+ lzma_block_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_block_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &block_decode;
+ next->end = &block_decoder_end;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Basic initializations
+ coder->sequence = SEQ_CODE;
+ coder->block = block;
+ coder->compressed_size = 0;
+ coder->uncompressed_size = 0;
+
+ // If Compressed Size is not known, we calculate the maximum allowed
+ // value so that encoded size of the Block (including Block Padding)
+ // is still a valid VLI and a multiple of four.
+ coder->compressed_limit
+ = block->compressed_size == LZMA_VLI_UNKNOWN
+ ? (LZMA_VLI_MAX & ~LZMA_VLI_C(3))
+ - block->header_size
+ - lzma_check_size(block->check)
+ : block->compressed_size;
+
+ // With Uncompressed Size this is simpler. If Block Header lacks
+ // the size info, then LZMA_VLI_MAX is the maximum possible
+ // Uncompressed Size.
+ coder->uncompressed_limit
+ = block->uncompressed_size == LZMA_VLI_UNKNOWN
+ ? LZMA_VLI_MAX
+ : block->uncompressed_size;
+
+ // Initialize the check. It's caller's problem if the Check ID is not
+ // supported, and the Block decoder cannot verify the Check field.
+ // Caller can test lzma_check_is_supported(block->check).
+ coder->check_pos = 0;
+ lzma_check_init(&coder->check, block->check);
+
+ coder->ignore_check = block->version >= 1
+ ? block->ignore_check : false;
+
+ // Initialize the filter chain.
+ return lzma_raw_decoder_init(&coder->next, allocator,
+ block->filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_decoder(lzma_stream *strm, lzma_block *block)
+{
+ lzma_next_strm_init(lzma_block_decoder_init, strm, block);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/block_decoder.h b/src/liblzma/common/block_decoder.h
new file mode 100644
index 0000000..718c5ce
--- /dev/null
+++ b/src/liblzma/common/block_decoder.h
@@ -0,0 +1,22 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_decoder.h
+/// \brief Decodes .xz Blocks
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_BLOCK_DECODER_H
+#define LZMA_BLOCK_DECODER_H
+
+#include "common.h"
+
+
+extern lzma_ret lzma_block_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator, lzma_block *block);
+
+#endif
diff --git a/src/liblzma/common/block_encoder.c b/src/liblzma/common/block_encoder.c
new file mode 100644
index 0000000..4a136ef
--- /dev/null
+++ b/src/liblzma/common/block_encoder.c
@@ -0,0 +1,227 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_encoder.c
+/// \brief Encodes .xz Blocks
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "block_encoder.h"
+#include "filter_encoder.h"
+#include "check.h"
+
+
+typedef struct {
+ /// The filters in the chain; initialized with lzma_raw_decoder_init().
+ lzma_next_coder next;
+
+ /// Encoding options; we also write Unpadded Size, Compressed Size,
+ /// and Uncompressed Size back to this structure when the encoding
+ /// has been finished.
+ lzma_block *block;
+
+ enum {
+ SEQ_CODE,
+ SEQ_PADDING,
+ SEQ_CHECK,
+ } sequence;
+
+ /// Compressed Size calculated while encoding
+ lzma_vli compressed_size;
+
+ /// Uncompressed Size calculated while encoding
+ lzma_vli uncompressed_size;
+
+ /// Position in the Check field
+ size_t pos;
+
+ /// Check of the uncompressed data
+ lzma_check_state check;
+} lzma_block_coder;
+
+
+static lzma_ret
+block_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_block_coder *coder = coder_ptr;
+
+ // Check that our amount of input stays in proper limits.
+ if (LZMA_VLI_MAX - coder->uncompressed_size < in_size - *in_pos)
+ return LZMA_DATA_ERROR;
+
+ switch (coder->sequence) {
+ case SEQ_CODE: {
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ const lzma_ret ret = coder->next.code(coder->next.coder,
+ allocator, in, in_pos, in_size,
+ out, out_pos, out_size, action);
+
+ const size_t in_used = *in_pos - in_start;
+ const size_t out_used = *out_pos - out_start;
+
+ if (COMPRESSED_SIZE_MAX - coder->compressed_size < out_used)
+ return LZMA_DATA_ERROR;
+
+ coder->compressed_size += out_used;
+
+ // No need to check for overflow because we have already
+ // checked it at the beginning of this function.
+ coder->uncompressed_size += in_used;
+
+ // Call lzma_check_update() only if input was consumed. This
+ // avoids null pointer + 0 (undefined behavior) when in == 0.
+ if (in_used > 0)
+ lzma_check_update(&coder->check, coder->block->check,
+ in + in_start, in_used);
+
+ if (ret != LZMA_STREAM_END || action == LZMA_SYNC_FLUSH)
+ return ret;
+
+ assert(*in_pos == in_size);
+ assert(action == LZMA_FINISH);
+
+ // Copy the values into coder->block. The caller
+ // may use this information to construct Index.
+ coder->block->compressed_size = coder->compressed_size;
+ coder->block->uncompressed_size = coder->uncompressed_size;
+
+ coder->sequence = SEQ_PADDING;
+ }
+
+ // Fall through
+
+ case SEQ_PADDING:
+ // Pad Compressed Data to a multiple of four bytes. We can
+ // use coder->compressed_size for this since we don't need
+ // it for anything else anymore.
+ while (coder->compressed_size & 3) {
+ if (*out_pos >= out_size)
+ return LZMA_OK;
+
+ out[*out_pos] = 0x00;
+ ++*out_pos;
+ ++coder->compressed_size;
+ }
+
+ if (coder->block->check == LZMA_CHECK_NONE)
+ return LZMA_STREAM_END;
+
+ lzma_check_finish(&coder->check, coder->block->check);
+
+ coder->sequence = SEQ_CHECK;
+
+ // Fall through
+
+ case SEQ_CHECK: {
+ const size_t check_size = lzma_check_size(coder->block->check);
+ lzma_bufcpy(coder->check.buffer.u8, &coder->pos, check_size,
+ out, out_pos, out_size);
+ if (coder->pos < check_size)
+ return LZMA_OK;
+
+ memcpy(coder->block->raw_check, coder->check.buffer.u8,
+ check_size);
+ return LZMA_STREAM_END;
+ }
+ }
+
+ return LZMA_PROG_ERROR;
+}
+
+
+static void
+block_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_block_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+block_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters lzma_attribute((__unused__)),
+ const lzma_filter *reversed_filters)
+{
+ lzma_block_coder *coder = coder_ptr;
+
+ if (coder->sequence != SEQ_CODE)
+ return LZMA_PROG_ERROR;
+
+ return lzma_next_filter_update(
+ &coder->next, allocator, reversed_filters);
+}
+
+
+extern lzma_ret
+lzma_block_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ lzma_block *block)
+{
+ lzma_next_coder_init(&lzma_block_encoder_init, next, allocator);
+
+ if (block == NULL)
+ return LZMA_PROG_ERROR;
+
+ // The contents of the structure may depend on the version so
+ // check the version first.
+ if (block->version > 1)
+ return LZMA_OPTIONS_ERROR;
+
+ // If the Check ID is not supported, we cannot calculate the check and
+ // thus not create a proper Block.
+ if ((unsigned int)(block->check) > LZMA_CHECK_ID_MAX)
+ return LZMA_PROG_ERROR;
+
+ if (!lzma_check_is_supported(block->check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ // Allocate and initialize *next->coder if needed.
+ lzma_block_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_block_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &block_encode;
+ next->end = &block_encoder_end;
+ next->update = &block_encoder_update;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Basic initializations
+ coder->sequence = SEQ_CODE;
+ coder->block = block;
+ coder->compressed_size = 0;
+ coder->uncompressed_size = 0;
+ coder->pos = 0;
+
+ // Initialize the check
+ lzma_check_init(&coder->check, block->check);
+
+ // Initialize the requested filters.
+ return lzma_raw_encoder_init(&coder->next, allocator, block->filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_encoder(lzma_stream *strm, lzma_block *block)
+{
+ lzma_next_strm_init(lzma_block_encoder_init, strm, block);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/block_encoder.h b/src/liblzma/common/block_encoder.h
new file mode 100644
index 0000000..bd97c18
--- /dev/null
+++ b/src/liblzma/common/block_encoder.h
@@ -0,0 +1,47 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_encoder.h
+/// \brief Encodes .xz Blocks
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_BLOCK_ENCODER_H
+#define LZMA_BLOCK_ENCODER_H
+
+#include "common.h"
+
+
+/// \brief Biggest Compressed Size value that the Block encoder supports
+///
+/// The maximum size of a single Block is limited by the maximum size of
+/// a Stream, which in theory is 2^63 - 3 bytes (i.e. LZMA_VLI_MAX - 3).
+/// While the size is really big and no one should hit it in practice, we
+/// take it into account in some places anyway to catch some errors e.g. if
+/// application passes insanely big value to some function.
+///
+/// We could take into account the headers etc. to determine the exact
+/// maximum size of the Compressed Data field, but the complexity would give
+/// us nothing useful. Instead, limit the size of Compressed Data so that
+/// even with biggest possible Block Header and Check fields the total
+/// encoded size of the Block stays as a valid VLI. This doesn't guarantee
+/// that the size of the Stream doesn't grow too big, but that problem is
+/// taken care outside the Block handling code.
+///
+/// ~LZMA_VLI_C(3) is to guarantee that if we need padding at the end of
+/// the Compressed Data field, it will still stay in the proper limit.
+///
+/// This constant is in this file because it is needed in both
+/// block_encoder.c and block_buffer_encoder.c.
+#define COMPRESSED_SIZE_MAX ((LZMA_VLI_MAX - LZMA_BLOCK_HEADER_SIZE_MAX \
+ - LZMA_CHECK_SIZE_MAX) & ~LZMA_VLI_C(3))
+
+
+extern lzma_ret lzma_block_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator, lzma_block *block);
+
+#endif
diff --git a/src/liblzma/common/block_header_decoder.c b/src/liblzma/common/block_header_decoder.c
new file mode 100644
index 0000000..c4935dc
--- /dev/null
+++ b/src/liblzma/common/block_header_decoder.c
@@ -0,0 +1,115 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_header_decoder.c
+/// \brief Decodes Block Header from .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "check.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_header_decode(lzma_block *block,
+ const lzma_allocator *allocator, const uint8_t *in)
+{
+ // NOTE: We consider the header to be corrupt not only when the
+ // CRC32 doesn't match, but also when variable-length integers
+ // are invalid or over 63 bits, or if the header is too small
+ // to contain the claimed information.
+
+ // Catch unexpected NULL pointers.
+ if (block == NULL || block->filters == NULL || in == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the filter options array. This way the caller can
+ // safely free() the options even if an error occurs in this function.
+ for (size_t i = 0; i <= LZMA_FILTERS_MAX; ++i) {
+ block->filters[i].id = LZMA_VLI_UNKNOWN;
+ block->filters[i].options = NULL;
+ }
+
+ // Versions 0 and 1 are supported. If a newer version was specified,
+ // we need to downgrade it.
+ if (block->version > 1)
+ block->version = 1;
+
+ // This isn't a Block Header option, but since the decompressor will
+ // read it if version >= 1, it's better to initialize it here than
+ // to expect the caller to do it since in almost all cases this
+ // should be false.
+ block->ignore_check = false;
+
+ // Validate Block Header Size and Check type. The caller must have
+ // already set these, so it is a programming error if this test fails.
+ if (lzma_block_header_size_decode(in[0]) != block->header_size
+ || (unsigned int)(block->check) > LZMA_CHECK_ID_MAX)
+ return LZMA_PROG_ERROR;
+
+ // Exclude the CRC32 field.
+ const size_t in_size = block->header_size - 4;
+
+ // Verify CRC32
+ if (lzma_crc32(in, in_size, 0) != read32le(in + in_size)) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ return LZMA_DATA_ERROR;
+#endif
+ }
+
+ // Check for unsupported flags.
+ if (in[1] & 0x3C)
+ return LZMA_OPTIONS_ERROR;
+
+ // Start after the Block Header Size and Block Flags fields.
+ size_t in_pos = 2;
+
+ // Compressed Size
+ if (in[1] & 0x40) {
+ return_if_error(lzma_vli_decode(&block->compressed_size,
+ NULL, in, &in_pos, in_size));
+
+ // Validate Compressed Size. This checks that it isn't zero
+ // and that the total size of the Block is a valid VLI.
+ if (lzma_block_unpadded_size(block) == 0)
+ return LZMA_DATA_ERROR;
+ } else {
+ block->compressed_size = LZMA_VLI_UNKNOWN;
+ }
+
+ // Uncompressed Size
+ if (in[1] & 0x80)
+ return_if_error(lzma_vli_decode(&block->uncompressed_size,
+ NULL, in, &in_pos, in_size));
+ else
+ block->uncompressed_size = LZMA_VLI_UNKNOWN;
+
+ // Filter Flags
+ const size_t filter_count = (in[1] & 3U) + 1;
+ for (size_t i = 0; i < filter_count; ++i) {
+ const lzma_ret ret = lzma_filter_flags_decode(
+ &block->filters[i], allocator,
+ in, &in_pos, in_size);
+ if (ret != LZMA_OK) {
+ lzma_filters_free(block->filters, allocator);
+ return ret;
+ }
+ }
+
+ // Padding
+ while (in_pos < in_size) {
+ if (in[in_pos++] != 0x00) {
+ lzma_filters_free(block->filters, allocator);
+
+ // Possibly some new field present so use
+ // LZMA_OPTIONS_ERROR instead of LZMA_DATA_ERROR.
+ return LZMA_OPTIONS_ERROR;
+ }
+ }
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/block_header_encoder.c b/src/liblzma/common/block_header_encoder.c
new file mode 100644
index 0000000..160425d
--- /dev/null
+++ b/src/liblzma/common/block_header_encoder.c
@@ -0,0 +1,132 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_header_encoder.c
+/// \brief Encodes Block Header for .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "check.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_header_size(lzma_block *block)
+{
+ if (block->version > 1)
+ return LZMA_OPTIONS_ERROR;
+
+ // Block Header Size + Block Flags + CRC32.
+ uint32_t size = 1 + 1 + 4;
+
+ // Compressed Size
+ if (block->compressed_size != LZMA_VLI_UNKNOWN) {
+ const uint32_t add = lzma_vli_size(block->compressed_size);
+ if (add == 0 || block->compressed_size == 0)
+ return LZMA_PROG_ERROR;
+
+ size += add;
+ }
+
+ // Uncompressed Size
+ if (block->uncompressed_size != LZMA_VLI_UNKNOWN) {
+ const uint32_t add = lzma_vli_size(block->uncompressed_size);
+ if (add == 0)
+ return LZMA_PROG_ERROR;
+
+ size += add;
+ }
+
+ // List of Filter Flags
+ if (block->filters == NULL || block->filters[0].id == LZMA_VLI_UNKNOWN)
+ return LZMA_PROG_ERROR;
+
+ for (size_t i = 0; block->filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ // Don't allow too many filters.
+ if (i == LZMA_FILTERS_MAX)
+ return LZMA_PROG_ERROR;
+
+ uint32_t add;
+ return_if_error(lzma_filter_flags_size(&add,
+ block->filters + i));
+
+ size += add;
+ }
+
+ // Pad to a multiple of four bytes.
+ block->header_size = (size + 3) & ~UINT32_C(3);
+
+ // NOTE: We don't verify that the encoded size of the Block stays
+ // within limits. This is because it is possible that we are called
+ // with exaggerated Compressed Size (e.g. LZMA_VLI_MAX) to reserve
+ // space for Block Header, and later called again with lower,
+ // real values.
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_header_encode(const lzma_block *block, uint8_t *out)
+{
+ // Validate everything but filters.
+ if (lzma_block_unpadded_size(block) == 0
+ || !lzma_vli_is_valid(block->uncompressed_size))
+ return LZMA_PROG_ERROR;
+
+ // Indicate the size of the buffer _excluding_ the CRC32 field.
+ const size_t out_size = block->header_size - 4;
+
+ // Store the Block Header Size.
+ out[0] = out_size / 4;
+
+ // We write Block Flags in pieces.
+ out[1] = 0x00;
+ size_t out_pos = 2;
+
+ // Compressed Size
+ if (block->compressed_size != LZMA_VLI_UNKNOWN) {
+ return_if_error(lzma_vli_encode(block->compressed_size, NULL,
+ out, &out_pos, out_size));
+
+ out[1] |= 0x40;
+ }
+
+ // Uncompressed Size
+ if (block->uncompressed_size != LZMA_VLI_UNKNOWN) {
+ return_if_error(lzma_vli_encode(block->uncompressed_size, NULL,
+ out, &out_pos, out_size));
+
+ out[1] |= 0x80;
+ }
+
+ // Filter Flags
+ if (block->filters == NULL || block->filters[0].id == LZMA_VLI_UNKNOWN)
+ return LZMA_PROG_ERROR;
+
+ size_t filter_count = 0;
+ do {
+ // There can be a maximum of four filters.
+ if (filter_count == LZMA_FILTERS_MAX)
+ return LZMA_PROG_ERROR;
+
+ return_if_error(lzma_filter_flags_encode(
+ block->filters + filter_count,
+ out, &out_pos, out_size));
+
+ } while (block->filters[++filter_count].id != LZMA_VLI_UNKNOWN);
+
+ out[1] |= filter_count - 1;
+
+ // Padding
+ memzero(out + out_pos, out_size - out_pos);
+
+ // CRC32
+ write32le(out + out_size, lzma_crc32(out, out_size, 0));
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/block_util.c b/src/liblzma/common/block_util.c
new file mode 100644
index 0000000..acb3111
--- /dev/null
+++ b/src/liblzma/common/block_util.c
@@ -0,0 +1,90 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_util.c
+/// \brief Utility functions to handle lzma_block
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "index.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_block_compressed_size(lzma_block *block, lzma_vli unpadded_size)
+{
+ // Validate everything but Uncompressed Size and filters.
+ if (lzma_block_unpadded_size(block) == 0)
+ return LZMA_PROG_ERROR;
+
+ const uint32_t container_size = block->header_size
+ + lzma_check_size(block->check);
+
+ // Validate that Compressed Size will be greater than zero.
+ if (unpadded_size <= container_size)
+ return LZMA_DATA_ERROR;
+
+ // Calculate what Compressed Size is supposed to be.
+ // If Compressed Size was present in Block Header,
+ // compare that the new value matches it.
+ const lzma_vli compressed_size = unpadded_size - container_size;
+ if (block->compressed_size != LZMA_VLI_UNKNOWN
+ && block->compressed_size != compressed_size)
+ return LZMA_DATA_ERROR;
+
+ block->compressed_size = compressed_size;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_block_unpadded_size(const lzma_block *block)
+{
+ // Validate the values that we are interested in i.e. all but
+ // Uncompressed Size and the filters.
+ //
+ // NOTE: This function is used for validation too, so it is
+ // essential that these checks are always done even if
+ // Compressed Size is unknown.
+ if (block == NULL || block->version > 1
+ || block->header_size < LZMA_BLOCK_HEADER_SIZE_MIN
+ || block->header_size > LZMA_BLOCK_HEADER_SIZE_MAX
+ || (block->header_size & 3)
+ || !lzma_vli_is_valid(block->compressed_size)
+ || block->compressed_size == 0
+ || (unsigned int)(block->check) > LZMA_CHECK_ID_MAX)
+ return 0;
+
+ // If Compressed Size is unknown, return that we cannot know
+ // size of the Block either.
+ if (block->compressed_size == LZMA_VLI_UNKNOWN)
+ return LZMA_VLI_UNKNOWN;
+
+ // Calculate Unpadded Size and validate it.
+ const lzma_vli unpadded_size = block->compressed_size
+ + block->header_size
+ + lzma_check_size(block->check);
+
+ assert(unpadded_size >= UNPADDED_SIZE_MIN);
+ if (unpadded_size > UNPADDED_SIZE_MAX)
+ return 0;
+
+ return unpadded_size;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_block_total_size(const lzma_block *block)
+{
+ lzma_vli unpadded_size = lzma_block_unpadded_size(block);
+
+ if (unpadded_size != LZMA_VLI_UNKNOWN)
+ unpadded_size = vli_ceil4(unpadded_size);
+
+ return unpadded_size;
+}
diff --git a/src/liblzma/common/common.c b/src/liblzma/common/common.c
new file mode 100644
index 0000000..adb50d7
--- /dev/null
+++ b/src/liblzma/common/common.c
@@ -0,0 +1,481 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file common.c
+/// \brief Common functions needed in many places in liblzma
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+/////////////
+// Version //
+/////////////
+
+extern LZMA_API(uint32_t)
+lzma_version_number(void)
+{
+ return LZMA_VERSION;
+}
+
+
+extern LZMA_API(const char *)
+lzma_version_string(void)
+{
+ return LZMA_VERSION_STRING;
+}
+
+
+///////////////////////
+// Memory allocation //
+///////////////////////
+
+lzma_attr_alloc_size(1)
+extern void *
+lzma_alloc(size_t size, const lzma_allocator *allocator)
+{
+ // Some malloc() variants return NULL if called with size == 0.
+ if (size == 0)
+ size = 1;
+
+ void *ptr;
+
+ if (allocator != NULL && allocator->alloc != NULL)
+ ptr = allocator->alloc(allocator->opaque, 1, size);
+ else
+ ptr = malloc(size);
+
+ return ptr;
+}
+
+
+lzma_attr_alloc_size(1)
+extern void *
+lzma_alloc_zero(size_t size, const lzma_allocator *allocator)
+{
+ // Some calloc() variants return NULL if called with size == 0.
+ if (size == 0)
+ size = 1;
+
+ void *ptr;
+
+ if (allocator != NULL && allocator->alloc != NULL) {
+ ptr = allocator->alloc(allocator->opaque, 1, size);
+ if (ptr != NULL)
+ memzero(ptr, size);
+ } else {
+ ptr = calloc(1, size);
+ }
+
+ return ptr;
+}
+
+
+extern void
+lzma_free(void *ptr, const lzma_allocator *allocator)
+{
+ if (allocator != NULL && allocator->free != NULL)
+ allocator->free(allocator->opaque, ptr);
+ else
+ free(ptr);
+
+ return;
+}
+
+
+//////////
+// Misc //
+//////////
+
+extern size_t
+lzma_bufcpy(const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size)
+{
+ const size_t in_avail = in_size - *in_pos;
+ const size_t out_avail = out_size - *out_pos;
+ const size_t copy_size = my_min(in_avail, out_avail);
+
+ // Call memcpy() only if there is something to copy. If there is
+ // nothing to copy, in or out might be NULL and then the memcpy()
+ // call would trigger undefined behavior.
+ if (copy_size > 0)
+ memcpy(out + *out_pos, in + *in_pos, copy_size);
+
+ *in_pos += copy_size;
+ *out_pos += copy_size;
+
+ return copy_size;
+}
+
+
+extern lzma_ret
+lzma_next_filter_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ lzma_next_coder_init(filters[0].init, next, allocator);
+ next->id = filters[0].id;
+ return filters[0].init == NULL
+ ? LZMA_OK : filters[0].init(next, allocator, filters);
+}
+
+
+extern lzma_ret
+lzma_next_filter_update(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *reversed_filters)
+{
+ // Check that the application isn't trying to change the Filter ID.
+ // End of filters is indicated with LZMA_VLI_UNKNOWN in both
+ // reversed_filters[0].id and next->id.
+ if (reversed_filters[0].id != next->id)
+ return LZMA_PROG_ERROR;
+
+ if (reversed_filters[0].id == LZMA_VLI_UNKNOWN)
+ return LZMA_OK;
+
+ assert(next->update != NULL);
+ return next->update(next->coder, allocator, NULL, reversed_filters);
+}
+
+
+extern void
+lzma_next_end(lzma_next_coder *next, const lzma_allocator *allocator)
+{
+ if (next->init != (uintptr_t)(NULL)) {
+ // To avoid tiny end functions that simply call
+ // lzma_free(coder, allocator), we allow leaving next->end
+ // NULL and call lzma_free() here.
+ if (next->end != NULL)
+ next->end(next->coder, allocator);
+ else
+ lzma_free(next->coder, allocator);
+
+ // Reset the variables so the we don't accidentally think
+ // that it is an already initialized coder.
+ *next = LZMA_NEXT_CODER_INIT;
+ }
+
+ return;
+}
+
+
+//////////////////////////////////////
+// External to internal API wrapper //
+//////////////////////////////////////
+
+extern lzma_ret
+lzma_strm_init(lzma_stream *strm)
+{
+ if (strm == NULL)
+ return LZMA_PROG_ERROR;
+
+ if (strm->internal == NULL) {
+ strm->internal = lzma_alloc(sizeof(lzma_internal),
+ strm->allocator);
+ if (strm->internal == NULL)
+ return LZMA_MEM_ERROR;
+
+ strm->internal->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ memzero(strm->internal->supported_actions,
+ sizeof(strm->internal->supported_actions));
+ strm->internal->sequence = ISEQ_RUN;
+ strm->internal->allow_buf_error = false;
+
+ strm->total_in = 0;
+ strm->total_out = 0;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_code(lzma_stream *strm, lzma_action action)
+{
+ // Sanity checks
+ if ((strm->next_in == NULL && strm->avail_in != 0)
+ || (strm->next_out == NULL && strm->avail_out != 0)
+ || strm->internal == NULL
+ || strm->internal->next.code == NULL
+ || (unsigned int)(action) > LZMA_ACTION_MAX
+ || !strm->internal->supported_actions[action])
+ return LZMA_PROG_ERROR;
+
+ // Check if unsupported members have been set to non-zero or non-NULL,
+ // which would indicate that some new feature is wanted.
+ if (strm->reserved_ptr1 != NULL
+ || strm->reserved_ptr2 != NULL
+ || strm->reserved_ptr3 != NULL
+ || strm->reserved_ptr4 != NULL
+ || strm->reserved_int2 != 0
+ || strm->reserved_int3 != 0
+ || strm->reserved_int4 != 0
+ || strm->reserved_enum1 != LZMA_RESERVED_ENUM
+ || strm->reserved_enum2 != LZMA_RESERVED_ENUM)
+ return LZMA_OPTIONS_ERROR;
+
+ switch (strm->internal->sequence) {
+ case ISEQ_RUN:
+ switch (action) {
+ case LZMA_RUN:
+ break;
+
+ case LZMA_SYNC_FLUSH:
+ strm->internal->sequence = ISEQ_SYNC_FLUSH;
+ break;
+
+ case LZMA_FULL_FLUSH:
+ strm->internal->sequence = ISEQ_FULL_FLUSH;
+ break;
+
+ case LZMA_FINISH:
+ strm->internal->sequence = ISEQ_FINISH;
+ break;
+
+ case LZMA_FULL_BARRIER:
+ strm->internal->sequence = ISEQ_FULL_BARRIER;
+ break;
+ }
+
+ break;
+
+ case ISEQ_SYNC_FLUSH:
+ // The same action must be used until we return
+ // LZMA_STREAM_END, and the amount of input must not change.
+ if (action != LZMA_SYNC_FLUSH
+ || strm->internal->avail_in != strm->avail_in)
+ return LZMA_PROG_ERROR;
+
+ break;
+
+ case ISEQ_FULL_FLUSH:
+ if (action != LZMA_FULL_FLUSH
+ || strm->internal->avail_in != strm->avail_in)
+ return LZMA_PROG_ERROR;
+
+ break;
+
+ case ISEQ_FINISH:
+ if (action != LZMA_FINISH
+ || strm->internal->avail_in != strm->avail_in)
+ return LZMA_PROG_ERROR;
+
+ break;
+
+ case ISEQ_FULL_BARRIER:
+ if (action != LZMA_FULL_BARRIER
+ || strm->internal->avail_in != strm->avail_in)
+ return LZMA_PROG_ERROR;
+
+ break;
+
+ case ISEQ_END:
+ return LZMA_STREAM_END;
+
+ case ISEQ_ERROR:
+ default:
+ return LZMA_PROG_ERROR;
+ }
+
+ size_t in_pos = 0;
+ size_t out_pos = 0;
+ lzma_ret ret = strm->internal->next.code(
+ strm->internal->next.coder, strm->allocator,
+ strm->next_in, &in_pos, strm->avail_in,
+ strm->next_out, &out_pos, strm->avail_out, action);
+
+ // Updating next_in and next_out has to be skipped when they are NULL
+ // to avoid null pointer + 0 (undefined behavior). Do this by checking
+ // in_pos > 0 and out_pos > 0 because this way NULL + non-zero (a bug)
+ // will get caught one way or other.
+ if (in_pos > 0) {
+ strm->next_in += in_pos;
+ strm->avail_in -= in_pos;
+ strm->total_in += in_pos;
+ }
+
+ if (out_pos > 0) {
+ strm->next_out += out_pos;
+ strm->avail_out -= out_pos;
+ strm->total_out += out_pos;
+ }
+
+ strm->internal->avail_in = strm->avail_in;
+
+ switch (ret) {
+ case LZMA_OK:
+ // Don't return LZMA_BUF_ERROR when it happens the first time.
+ // This is to avoid returning LZMA_BUF_ERROR when avail_out
+ // was zero but still there was no more data left to written
+ // to next_out.
+ if (out_pos == 0 && in_pos == 0) {
+ if (strm->internal->allow_buf_error)
+ ret = LZMA_BUF_ERROR;
+ else
+ strm->internal->allow_buf_error = true;
+ } else {
+ strm->internal->allow_buf_error = false;
+ }
+ break;
+
+ case LZMA_TIMED_OUT:
+ strm->internal->allow_buf_error = false;
+ ret = LZMA_OK;
+ break;
+
+ case LZMA_SEEK_NEEDED:
+ strm->internal->allow_buf_error = false;
+
+ // If LZMA_FINISH was used, reset it back to the
+ // LZMA_RUN-based state so that new input can be supplied
+ // by the application.
+ if (strm->internal->sequence == ISEQ_FINISH)
+ strm->internal->sequence = ISEQ_RUN;
+
+ break;
+
+ case LZMA_STREAM_END:
+ if (strm->internal->sequence == ISEQ_SYNC_FLUSH
+ || strm->internal->sequence == ISEQ_FULL_FLUSH
+ || strm->internal->sequence
+ == ISEQ_FULL_BARRIER)
+ strm->internal->sequence = ISEQ_RUN;
+ else
+ strm->internal->sequence = ISEQ_END;
+
+ // Fall through
+
+ case LZMA_NO_CHECK:
+ case LZMA_UNSUPPORTED_CHECK:
+ case LZMA_GET_CHECK:
+ case LZMA_MEMLIMIT_ERROR:
+ // Something else than LZMA_OK, but not a fatal error,
+ // that is, coding may be continued (except if ISEQ_END).
+ strm->internal->allow_buf_error = false;
+ break;
+
+ default:
+ // All the other errors are fatal; coding cannot be continued.
+ assert(ret != LZMA_BUF_ERROR);
+ strm->internal->sequence = ISEQ_ERROR;
+ break;
+ }
+
+ return ret;
+}
+
+
+extern LZMA_API(void)
+lzma_end(lzma_stream *strm)
+{
+ if (strm != NULL && strm->internal != NULL) {
+ lzma_next_end(&strm->internal->next, strm->allocator);
+ lzma_free(strm->internal, strm->allocator);
+ strm->internal = NULL;
+ }
+
+ return;
+}
+
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+// This is for compatibility with binaries linked against liblzma that
+// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
+LZMA_SYMVER_API("lzma_get_progress@XZ_5.2.2",
+ void, lzma_get_progress_522)(lzma_stream *strm,
+ uint64_t *progress_in, uint64_t *progress_out) lzma_nothrow
+ __attribute__((__alias__("lzma_get_progress_52")));
+
+LZMA_SYMVER_API("lzma_get_progress@@XZ_5.2",
+ void, lzma_get_progress_52)(lzma_stream *strm,
+ uint64_t *progress_in, uint64_t *progress_out) lzma_nothrow;
+
+#define lzma_get_progress lzma_get_progress_52
+#endif
+extern LZMA_API(void)
+lzma_get_progress(lzma_stream *strm,
+ uint64_t *progress_in, uint64_t *progress_out)
+{
+ if (strm->internal->next.get_progress != NULL) {
+ strm->internal->next.get_progress(strm->internal->next.coder,
+ progress_in, progress_out);
+ } else {
+ *progress_in = strm->total_in;
+ *progress_out = strm->total_out;
+ }
+
+ return;
+}
+
+
+extern LZMA_API(lzma_check)
+lzma_get_check(const lzma_stream *strm)
+{
+ // Return LZMA_CHECK_NONE if we cannot know the check type.
+ // It's a bug in the application if this happens.
+ if (strm->internal->next.get_check == NULL)
+ return LZMA_CHECK_NONE;
+
+ return strm->internal->next.get_check(strm->internal->next.coder);
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_memusage(const lzma_stream *strm)
+{
+ uint64_t memusage;
+ uint64_t old_memlimit;
+
+ if (strm == NULL || strm->internal == NULL
+ || strm->internal->next.memconfig == NULL
+ || strm->internal->next.memconfig(
+ strm->internal->next.coder,
+ &memusage, &old_memlimit, 0) != LZMA_OK)
+ return 0;
+
+ return memusage;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_memlimit_get(const lzma_stream *strm)
+{
+ uint64_t old_memlimit;
+ uint64_t memusage;
+
+ if (strm == NULL || strm->internal == NULL
+ || strm->internal->next.memconfig == NULL
+ || strm->internal->next.memconfig(
+ strm->internal->next.coder,
+ &memusage, &old_memlimit, 0) != LZMA_OK)
+ return 0;
+
+ return old_memlimit;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_memlimit_set(lzma_stream *strm, uint64_t new_memlimit)
+{
+ // Dummy variables to simplify memconfig functions
+ uint64_t old_memlimit;
+ uint64_t memusage;
+
+ if (strm == NULL || strm->internal == NULL
+ || strm->internal->next.memconfig == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Zero is a special value that cannot be used as an actual limit.
+ // If 0 was specified, use 1 instead.
+ if (new_memlimit == 0)
+ new_memlimit = 1;
+
+ return strm->internal->next.memconfig(strm->internal->next.coder,
+ &memusage, &old_memlimit, new_memlimit);
+}
diff --git a/src/liblzma/common/common.h b/src/liblzma/common/common.h
new file mode 100644
index 0000000..378923e
--- /dev/null
+++ b/src/liblzma/common/common.h
@@ -0,0 +1,413 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file common.h
+/// \brief Definitions common to the whole liblzma library
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_COMMON_H
+#define LZMA_COMMON_H
+
+#include "sysdefs.h"
+#include "mythread.h"
+#include "tuklib_integer.h"
+
+// LZMA_API_EXPORT is used to mark the exported API functions.
+// It's used to define the LZMA_API macro.
+//
+// lzma_attr_visibility_hidden is used for marking *declarations* of extern
+// variables that are internal to liblzma (-fvisibility=hidden alone is
+// enough to hide the *definitions*). Such markings allow slightly more
+// efficient code to accesses those variables in ELF shared libraries.
+#if defined(_WIN32) || defined(__CYGWIN__)
+# ifdef DLL_EXPORT
+# define LZMA_API_EXPORT __declspec(dllexport)
+# else
+# define LZMA_API_EXPORT
+# endif
+# define lzma_attr_visibility_hidden
+// Don't use ifdef or defined() below.
+#elif HAVE_VISIBILITY
+# define LZMA_API_EXPORT __attribute__((__visibility__("default")))
+# define lzma_attr_visibility_hidden \
+ __attribute__((__visibility__("hidden")))
+#else
+# define LZMA_API_EXPORT
+# define lzma_attr_visibility_hidden
+#endif
+
+#define LZMA_API(type) LZMA_API_EXPORT type LZMA_API_CALL
+
+#include "lzma.h"
+
+// This is for detecting modern GCC and Clang attributes
+// like __symver__ in GCC >= 10.
+#ifdef __has_attribute
+# define lzma_has_attribute(attr) __has_attribute(attr)
+#else
+# define lzma_has_attribute(attr) 0
+#endif
+
+// The extra symbol versioning in the C files may only be used when
+// building a shared library. If HAVE_SYMBOL_VERSIONS_LINUX is defined
+// to 2 then symbol versioning is done only if also PIC is defined.
+// By default Libtool defines PIC when building a shared library and
+// doesn't define it when building a static library but it can be
+// overridden with --with-pic and --without-pic. configure let's rely
+// on PIC if neither --with-pic or --without-pic was used.
+#if defined(HAVE_SYMBOL_VERSIONS_LINUX) \
+ && (HAVE_SYMBOL_VERSIONS_LINUX == 2 && !defined(PIC))
+# undef HAVE_SYMBOL_VERSIONS_LINUX
+#endif
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+// To keep link-time optimization (LTO, -flto) working with GCC,
+// the __symver__ attribute must be used instead of __asm__(".symver ...").
+// Otherwise the symbol versions may be lost, resulting in broken liblzma
+// that has wrong default versions in the exported symbol list!
+// The attribute was added in GCC 10; LTO with older GCC is not supported.
+//
+// To keep -Wmissing-prototypes happy, use LZMA_SYMVER_API only with function
+// declarations (including those with __alias__ attribute) and LZMA_API with
+// the function definitions. This means a little bit of silly copy-and-paste
+// between declarations and definitions though.
+//
+// As of GCC 12.2, the __symver__ attribute supports only @ and @@ but the
+// very convenient @@@ isn't supported (it's supported by GNU assembler
+// since 2000). When using @@ instead of @@@, the internal name must not be
+// the same as the external name to avoid problems in some situations. This
+// is why "#define foo_52 foo" is needed for the default symbol versions.
+//
+// __has_attribute is supported before GCC 10 and it is supported in Clang 14
+// too (which doesn't support __symver__) so use it to detect if __symver__
+// is available. This should be far more reliable than looking at compiler
+// version macros as nowadays especially __GNUC__ is defined by many compilers.
+# if lzma_has_attribute(__symver__)
+# define LZMA_SYMVER_API(extnamever, type, intname) \
+ extern __attribute__((__symver__(extnamever))) \
+ LZMA_API(type) intname
+# else
+# define LZMA_SYMVER_API(extnamever, type, intname) \
+ __asm__(".symver " #intname "," extnamever); \
+ extern LZMA_API(type) intname
+# endif
+#endif
+
+// MSVC has __forceinline which shouldn't be combined with the inline keyword
+// (results in a warning).
+//
+// GCC 3.1 added always_inline attribute so we don't need to check
+// for __GNUC__ version. Similarly, all relevant Clang versions
+// support it (at least Clang 3.0.0 does already).
+// Other compilers might support too which also support __has_attribute
+// (Solaris Studio) so do that check too.
+#if defined(_MSC_VER)
+# define lzma_always_inline __forceinline
+#elif defined(__GNUC__) || defined(__clang__) || defined(__INTEL_COMPILER) \
+ || lzma_has_attribute(__always_inline__)
+# define lzma_always_inline inline __attribute__((__always_inline__))
+#else
+# define lzma_always_inline inline
+#endif
+
+// These allow helping the compiler in some often-executed branches, whose
+// result is almost always the same.
+#ifdef __GNUC__
+# define likely(expr) __builtin_expect(expr, true)
+# define unlikely(expr) __builtin_expect(expr, false)
+#else
+# define likely(expr) (expr)
+# define unlikely(expr) (expr)
+#endif
+
+
+/// Size of temporary buffers needed in some filters
+#define LZMA_BUFFER_SIZE 4096
+
+
+/// Maximum number of worker threads within one multithreaded component.
+/// The limit exists solely to make it simpler to prevent integer overflows
+/// when allocating structures etc. This should be big enough for now...
+/// the code won't scale anywhere close to this number anyway.
+#define LZMA_THREADS_MAX 16384
+
+
+/// Starting value for memory usage estimates. Instead of calculating size
+/// of _every_ structure and taking into account malloc() overhead etc., we
+/// add a base size to all memory usage estimates. It's not very accurate
+/// but should be easily good enough.
+#define LZMA_MEMUSAGE_BASE (UINT64_C(1) << 15)
+
+/// Start of internal Filter ID space. These IDs must never be used
+/// in Streams.
+#define LZMA_FILTER_RESERVED_START (LZMA_VLI_C(1) << 62)
+
+
+/// Supported flags that can be passed to lzma_stream_decoder(),
+/// lzma_auto_decoder(), or lzma_stream_decoder_mt().
+#define LZMA_SUPPORTED_FLAGS \
+ ( LZMA_TELL_NO_CHECK \
+ | LZMA_TELL_UNSUPPORTED_CHECK \
+ | LZMA_TELL_ANY_CHECK \
+ | LZMA_IGNORE_CHECK \
+ | LZMA_CONCATENATED \
+ | LZMA_FAIL_FAST )
+
+
+/// Largest valid lzma_action value as unsigned integer.
+#define LZMA_ACTION_MAX ((unsigned int)(LZMA_FULL_BARRIER))
+
+
+/// Special return value (lzma_ret) to indicate that a timeout was reached
+/// and lzma_code() must not return LZMA_BUF_ERROR. This is converted to
+/// LZMA_OK in lzma_code().
+#define LZMA_TIMED_OUT LZMA_RET_INTERNAL1
+
+/// Special return value (lzma_ret) for use in stream_decoder_mt.c to
+/// indicate Index was detected instead of a Block Header.
+#define LZMA_INDEX_DETECTED LZMA_RET_INTERNAL2
+
+
+typedef struct lzma_next_coder_s lzma_next_coder;
+
+typedef struct lzma_filter_info_s lzma_filter_info;
+
+
+/// Type of a function used to initialize a filter encoder or decoder
+typedef lzma_ret (*lzma_init_function)(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+/// Type of a function to do some kind of coding work (filters, Stream,
+/// Block encoders/decoders etc.). Some special coders use don't use both
+/// input and output buffers, but for simplicity they still use this same
+/// function prototype.
+typedef lzma_ret (*lzma_code_function)(
+ void *coder, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size,
+ lzma_action action);
+
+/// Type of a function to free the memory allocated for the coder
+typedef void (*lzma_end_function)(
+ void *coder, const lzma_allocator *allocator);
+
+
+/// Raw coder validates and converts an array of lzma_filter structures to
+/// an array of lzma_filter_info structures. This array is used with
+/// lzma_next_filter_init to initialize the filter chain.
+struct lzma_filter_info_s {
+ /// Filter ID. This can be used to share the same initiazation
+ /// function *and* data structures with different Filter IDs
+ /// (LZMA_FILTER_LZMA1EXT does it), and also by the encoder
+ /// with lzma_filters_update() if filter chain is updated
+ /// in the middle of a raw stream or Block (LZMA_SYNC_FLUSH).
+ lzma_vli id;
+
+ /// Pointer to function used to initialize the filter.
+ /// This is NULL to indicate end of array.
+ lzma_init_function init;
+
+ /// Pointer to filter's options structure
+ void *options;
+};
+
+
+/// Hold data and function pointers of the next filter in the chain.
+struct lzma_next_coder_s {
+ /// Pointer to coder-specific data
+ void *coder;
+
+ /// Filter ID. This is LZMA_VLI_UNKNOWN when this structure doesn't
+ /// point to a filter coder.
+ lzma_vli id;
+
+ /// "Pointer" to init function. This is never called here.
+ /// We need only to detect if we are initializing a coder
+ /// that was allocated earlier. See lzma_next_coder_init and
+ /// lzma_next_strm_init macros in this file.
+ uintptr_t init;
+
+ /// Pointer to function to do the actual coding
+ lzma_code_function code;
+
+ /// Pointer to function to free lzma_next_coder.coder. This can
+ /// be NULL; in that case, lzma_free is called to free
+ /// lzma_next_coder.coder.
+ lzma_end_function end;
+
+ /// Pointer to a function to get progress information. If this is NULL,
+ /// lzma_stream.total_in and .total_out are used instead.
+ void (*get_progress)(void *coder,
+ uint64_t *progress_in, uint64_t *progress_out);
+
+ /// Pointer to function to return the type of the integrity check.
+ /// Most coders won't support this.
+ lzma_check (*get_check)(const void *coder);
+
+ /// Pointer to function to get and/or change the memory usage limit.
+ /// If new_memlimit == 0, the limit is not changed.
+ lzma_ret (*memconfig)(void *coder, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit);
+
+ /// Update the filter-specific options or the whole filter chain
+ /// in the encoder.
+ lzma_ret (*update)(void *coder, const lzma_allocator *allocator,
+ const lzma_filter *filters,
+ const lzma_filter *reversed_filters);
+
+ /// Set how many bytes of output this coder may produce at maximum.
+ /// On success LZMA_OK must be returned.
+ /// If the filter chain as a whole cannot support this feature,
+ /// this must return LZMA_OPTIONS_ERROR.
+ /// If no input has been given to the coder and the requested limit
+ /// is too small, this must return LZMA_BUF_ERROR. If input has been
+ /// seen, LZMA_OK is allowed too.
+ lzma_ret (*set_out_limit)(void *coder, uint64_t *uncomp_size,
+ uint64_t out_limit);
+};
+
+
+/// Macro to initialize lzma_next_coder structure
+#define LZMA_NEXT_CODER_INIT \
+ (lzma_next_coder){ \
+ .coder = NULL, \
+ .init = (uintptr_t)(NULL), \
+ .id = LZMA_VLI_UNKNOWN, \
+ .code = NULL, \
+ .end = NULL, \
+ .get_progress = NULL, \
+ .get_check = NULL, \
+ .memconfig = NULL, \
+ .update = NULL, \
+ .set_out_limit = NULL, \
+ }
+
+
+/// Internal data for lzma_strm_init, lzma_code, and lzma_end. A pointer to
+/// this is stored in lzma_stream.
+struct lzma_internal_s {
+ /// The actual coder that should do something useful
+ lzma_next_coder next;
+
+ /// Track the state of the coder. This is used to validate arguments
+ /// so that the actual coders can rely on e.g. that LZMA_SYNC_FLUSH
+ /// is used on every call to lzma_code until next.code has returned
+ /// LZMA_STREAM_END.
+ enum {
+ ISEQ_RUN,
+ ISEQ_SYNC_FLUSH,
+ ISEQ_FULL_FLUSH,
+ ISEQ_FINISH,
+ ISEQ_FULL_BARRIER,
+ ISEQ_END,
+ ISEQ_ERROR,
+ } sequence;
+
+ /// A copy of lzma_stream avail_in. This is used to verify that the
+ /// amount of input doesn't change once e.g. LZMA_FINISH has been
+ /// used.
+ size_t avail_in;
+
+ /// Indicates which lzma_action values are allowed by next.code.
+ bool supported_actions[LZMA_ACTION_MAX + 1];
+
+ /// If true, lzma_code will return LZMA_BUF_ERROR if no progress was
+ /// made (no input consumed and no output produced by next.code).
+ bool allow_buf_error;
+};
+
+
+/// Allocates memory
+lzma_attr_alloc_size(1)
+extern void *lzma_alloc(size_t size, const lzma_allocator *allocator);
+
+/// Allocates memory and zeroes it (like calloc()). This can be faster
+/// than lzma_alloc() + memzero() while being backward compatible with
+/// custom allocators.
+lzma_attr_alloc_size(1)
+extern void *lzma_alloc_zero(size_t size, const lzma_allocator *allocator);
+
+/// Frees memory
+extern void lzma_free(void *ptr, const lzma_allocator *allocator);
+
+
+/// Allocates strm->internal if it is NULL, and initializes *strm and
+/// strm->internal. This function is only called via lzma_next_strm_init macro.
+extern lzma_ret lzma_strm_init(lzma_stream *strm);
+
+/// Initializes the next filter in the chain, if any. This takes care of
+/// freeing the memory of previously initialized filter if it is different
+/// than the filter being initialized now. This way the actual filter
+/// initialization functions don't need to use lzma_next_coder_init macro.
+extern lzma_ret lzma_next_filter_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+/// Update the next filter in the chain, if any. This checks that
+/// the application is not trying to change the Filter IDs.
+extern lzma_ret lzma_next_filter_update(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *reversed_filters);
+
+/// Frees the memory allocated for next->coder either using next->end or,
+/// if next->end is NULL, using lzma_free.
+extern void lzma_next_end(lzma_next_coder *next,
+ const lzma_allocator *allocator);
+
+
+/// Copy as much data as possible from in[] to out[] and update *in_pos
+/// and *out_pos accordingly. Returns the number of bytes copied.
+extern size_t lzma_bufcpy(const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size);
+
+
+/// \brief Return if expression doesn't evaluate to LZMA_OK
+///
+/// There are several situations where we want to return immediately
+/// with the value of expr if it isn't LZMA_OK. This macro shortens
+/// the code a little.
+#define return_if_error(expr) \
+do { \
+ const lzma_ret ret_ = (expr); \
+ if (ret_ != LZMA_OK) \
+ return ret_; \
+} while (0)
+
+
+/// If next isn't already initialized, free the previous coder. Then mark
+/// that next is _possibly_ initialized for the coder using this macro.
+/// "Possibly" means that if e.g. allocation of next->coder fails, the
+/// structure isn't actually initialized for this coder, but leaving
+/// next->init to func is still OK.
+#define lzma_next_coder_init(func, next, allocator) \
+do { \
+ if ((uintptr_t)(func) != (next)->init) \
+ lzma_next_end(next, allocator); \
+ (next)->init = (uintptr_t)(func); \
+} while (0)
+
+
+/// Initializes lzma_strm and calls func() to initialize strm->internal->next.
+/// (The function being called will use lzma_next_coder_init()). If
+/// initialization fails, memory that wasn't freed by func() is freed
+/// along strm->internal.
+#define lzma_next_strm_init(func, strm, ...) \
+do { \
+ return_if_error(lzma_strm_init(strm)); \
+ const lzma_ret ret_ = func(&(strm)->internal->next, \
+ (strm)->allocator, __VA_ARGS__); \
+ if (ret_ != LZMA_OK) { \
+ lzma_end(strm); \
+ return ret_; \
+ } \
+} while (0)
+
+#endif
diff --git a/src/liblzma/common/easy_buffer_encoder.c b/src/liblzma/common/easy_buffer_encoder.c
new file mode 100644
index 0000000..48eb56f
--- /dev/null
+++ b/src/liblzma/common/easy_buffer_encoder.c
@@ -0,0 +1,27 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_buffer_encoder.c
+/// \brief Easy single-call .xz Stream encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_easy_buffer_encode(uint32_t preset, lzma_check check,
+ const lzma_allocator *allocator, const uint8_t *in,
+ size_t in_size, uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ lzma_options_easy opt_easy;
+ if (lzma_easy_preset(&opt_easy, preset))
+ return LZMA_OPTIONS_ERROR;
+
+ return lzma_stream_buffer_encode(opt_easy.filters, check,
+ allocator, in, in_size, out, out_pos, out_size);
+}
diff --git a/src/liblzma/common/easy_decoder_memusage.c b/src/liblzma/common/easy_decoder_memusage.c
new file mode 100644
index 0000000..20bcd5b
--- /dev/null
+++ b/src/liblzma/common/easy_decoder_memusage.c
@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_decoder_memusage.c
+/// \brief Decoder memory usage calculation to match easy encoder presets
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_easy_decoder_memusage(uint32_t preset)
+{
+ lzma_options_easy opt_easy;
+ if (lzma_easy_preset(&opt_easy, preset))
+ return UINT32_MAX;
+
+ return lzma_raw_decoder_memusage(opt_easy.filters);
+}
diff --git a/src/liblzma/common/easy_encoder.c b/src/liblzma/common/easy_encoder.c
new file mode 100644
index 0000000..5cb492d
--- /dev/null
+++ b/src/liblzma/common/easy_encoder.c
@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_encoder.c
+/// \brief Easy .xz Stream encoder initialization
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_easy_encoder(lzma_stream *strm, uint32_t preset, lzma_check check)
+{
+ lzma_options_easy opt_easy;
+ if (lzma_easy_preset(&opt_easy, preset))
+ return LZMA_OPTIONS_ERROR;
+
+ return lzma_stream_encoder(strm, opt_easy.filters, check);
+}
diff --git a/src/liblzma/common/easy_encoder_memusage.c b/src/liblzma/common/easy_encoder_memusage.c
new file mode 100644
index 0000000..e910575
--- /dev/null
+++ b/src/liblzma/common/easy_encoder_memusage.c
@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_encoder_memusage.c
+/// \brief Easy .xz Stream encoder memory usage calculation
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_easy_encoder_memusage(uint32_t preset)
+{
+ lzma_options_easy opt_easy;
+ if (lzma_easy_preset(&opt_easy, preset))
+ return UINT32_MAX;
+
+ return lzma_raw_encoder_memusage(opt_easy.filters);
+}
diff --git a/src/liblzma/common/easy_preset.c b/src/liblzma/common/easy_preset.c
new file mode 100644
index 0000000..2f98598
--- /dev/null
+++ b/src/liblzma/common/easy_preset.c
@@ -0,0 +1,27 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_preset.c
+/// \brief Preset handling for easy encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern bool
+lzma_easy_preset(lzma_options_easy *opt_easy, uint32_t preset)
+{
+ if (lzma_lzma_preset(&opt_easy->opt_lzma, preset))
+ return true;
+
+ opt_easy->filters[0].id = LZMA_FILTER_LZMA2;
+ opt_easy->filters[0].options = &opt_easy->opt_lzma;
+ opt_easy->filters[1].id = LZMA_VLI_UNKNOWN;
+
+ return false;
+}
diff --git a/src/liblzma/common/easy_preset.h b/src/liblzma/common/easy_preset.h
new file mode 100644
index 0000000..382ade8
--- /dev/null
+++ b/src/liblzma/common/easy_preset.h
@@ -0,0 +1,32 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file easy_preset.h
+/// \brief Preset handling for easy encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+typedef struct {
+ /// We need to keep the filters array available in case
+ /// LZMA_FULL_FLUSH is used.
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+ /// Options for LZMA2
+ lzma_options_lzma opt_lzma;
+
+ // Options for more filters can be added later, so this struct
+ // is not ready to be put into the public API.
+
+} lzma_options_easy;
+
+
+/// Set *easy to the settings given by the preset. Returns true on error,
+/// false on success.
+extern bool lzma_easy_preset(lzma_options_easy *easy, uint32_t preset);
diff --git a/src/liblzma/common/file_info.c b/src/liblzma/common/file_info.c
new file mode 100644
index 0000000..799bb02
--- /dev/null
+++ b/src/liblzma/common/file_info.c
@@ -0,0 +1,855 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file file_info.c
+/// \brief Decode .xz file information into a lzma_index structure
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "index_decoder.h"
+
+
+typedef struct {
+ enum {
+ SEQ_MAGIC_BYTES,
+ SEQ_PADDING_SEEK,
+ SEQ_PADDING_DECODE,
+ SEQ_FOOTER,
+ SEQ_INDEX_INIT,
+ SEQ_INDEX_DECODE,
+ SEQ_HEADER_DECODE,
+ SEQ_HEADER_COMPARE,
+ } sequence;
+
+ /// Absolute position of in[*in_pos] in the file. All code that
+ /// modifies *in_pos also updates this. seek_to_pos() needs this
+ /// to determine if we need to request the application to seek for
+ /// us or if we can do the seeking internally by adjusting *in_pos.
+ uint64_t file_cur_pos;
+
+ /// This refers to absolute positions of interesting parts of the
+ /// input file. Sometimes it points to the *beginning* of a specific
+ /// field and sometimes to the *end* of a field. The current target
+ /// position at each moment is explained in the comments.
+ uint64_t file_target_pos;
+
+ /// Size of the .xz file (from the application).
+ uint64_t file_size;
+
+ /// Index decoder
+ lzma_next_coder index_decoder;
+
+ /// Number of bytes remaining in the Index field that is currently
+ /// being decoded.
+ lzma_vli index_remaining;
+
+ /// The Index decoder will store the decoded Index in this pointer.
+ lzma_index *this_index;
+
+ /// Amount of Stream Padding in the current Stream.
+ lzma_vli stream_padding;
+
+ /// The final combined index is collected here.
+ lzma_index *combined_index;
+
+ /// Pointer from the application where to store the index information
+ /// after successful decoding.
+ lzma_index **dest_index;
+
+ /// Pointer to lzma_stream.seek_pos to be used when returning
+ /// LZMA_SEEK_NEEDED. This is set by seek_to_pos() when needed.
+ uint64_t *external_seek_pos;
+
+ /// Memory usage limit
+ uint64_t memlimit;
+
+ /// Stream Flags from the very beginning of the file.
+ lzma_stream_flags first_header_flags;
+
+ /// Stream Flags from Stream Header of the current Stream.
+ lzma_stream_flags header_flags;
+
+ /// Stream Flags from Stream Footer of the current Stream.
+ lzma_stream_flags footer_flags;
+
+ size_t temp_pos;
+ size_t temp_size;
+ uint8_t temp[8192];
+
+} lzma_file_info_coder;
+
+
+/// Copies data from in[*in_pos] into coder->temp until
+/// coder->temp_pos == coder->temp_size. This also keeps coder->file_cur_pos
+/// in sync with *in_pos. Returns true if more input is needed.
+static bool
+fill_temp(lzma_file_info_coder *coder, const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size)
+{
+ coder->file_cur_pos += lzma_bufcpy(in, in_pos, in_size,
+ coder->temp, &coder->temp_pos, coder->temp_size);
+ return coder->temp_pos < coder->temp_size;
+}
+
+
+/// Seeks to the absolute file position specified by target_pos.
+/// This tries to do the seeking by only modifying *in_pos, if possible.
+/// The main benefit of this is that if one passes the whole file at once
+/// to lzma_code(), the decoder will never need to return LZMA_SEEK_NEEDED
+/// as all the seeking can be done by adjusting *in_pos in this function.
+///
+/// Returns true if an external seek is needed and the caller must return
+/// LZMA_SEEK_NEEDED.
+static bool
+seek_to_pos(lzma_file_info_coder *coder, uint64_t target_pos,
+ size_t in_start, size_t *in_pos, size_t in_size)
+{
+ // The input buffer doesn't extend beyond the end of the file.
+ // This has been checked by file_info_decode() already.
+ assert(coder->file_size - coder->file_cur_pos >= in_size - *in_pos);
+
+ const uint64_t pos_min = coder->file_cur_pos - (*in_pos - in_start);
+ const uint64_t pos_max = coder->file_cur_pos + (in_size - *in_pos);
+
+ bool external_seek_needed;
+
+ if (target_pos >= pos_min && target_pos <= pos_max) {
+ // The requested position is available in the current input
+ // buffer or right after it. That is, in a corner case we
+ // end up setting *in_pos == in_size and thus will immediately
+ // need new input bytes from the application.
+ *in_pos += (size_t)(target_pos - coder->file_cur_pos);
+ external_seek_needed = false;
+ } else {
+ // Ask the application to seek the input file.
+ *coder->external_seek_pos = target_pos;
+ external_seek_needed = true;
+
+ // Mark the whole input buffer as used. This way
+ // lzma_stream.total_in will have a better estimate
+ // of the amount of data read. It still won't be perfect
+ // as the value will depend on the input buffer size that
+ // the application uses, but it should be good enough for
+ // those few who want an estimate.
+ *in_pos = in_size;
+ }
+
+ // After seeking (internal or external) the current position
+ // will match the requested target position.
+ coder->file_cur_pos = target_pos;
+
+ return external_seek_needed;
+}
+
+
+/// The caller sets coder->file_target_pos so that it points to the *end*
+/// of the desired file position. This function then determines how far
+/// backwards from that position we can seek. After seeking fill_temp()
+/// can be used to read data into coder->temp. When fill_temp() has finished,
+/// coder->temp[coder->temp_size] will match coder->file_target_pos.
+///
+/// This also validates that coder->target_file_pos is sane in sense that
+/// we aren't trying to seek too far backwards (too close or beyond the
+/// beginning of the file).
+static lzma_ret
+reverse_seek(lzma_file_info_coder *coder,
+ size_t in_start, size_t *in_pos, size_t in_size)
+{
+ // Check that there is enough data before the target position
+ // to contain at least Stream Header and Stream Footer. If there
+ // isn't, the file cannot be valid.
+ if (coder->file_target_pos < 2 * LZMA_STREAM_HEADER_SIZE)
+ return LZMA_DATA_ERROR;
+
+ coder->temp_pos = 0;
+
+ // The Stream Header at the very beginning of the file gets handled
+ // specially in SEQ_MAGIC_BYTES and thus we will never need to seek
+ // there. By not seeking to the first LZMA_STREAM_HEADER_SIZE bytes
+ // we avoid a useless external seek after SEQ_MAGIC_BYTES if the
+ // application uses an extremely small input buffer and the input
+ // file is very small.
+ if (coder->file_target_pos - LZMA_STREAM_HEADER_SIZE
+ < sizeof(coder->temp))
+ coder->temp_size = (size_t)(coder->file_target_pos
+ - LZMA_STREAM_HEADER_SIZE);
+ else
+ coder->temp_size = sizeof(coder->temp);
+
+ // The above if-statements guarantee this. This is important because
+ // the Stream Header/Footer decoders assume that there's at least
+ // LZMA_STREAM_HEADER_SIZE bytes in coder->temp.
+ assert(coder->temp_size >= LZMA_STREAM_HEADER_SIZE);
+
+ if (seek_to_pos(coder, coder->file_target_pos - coder->temp_size,
+ in_start, in_pos, in_size))
+ return LZMA_SEEK_NEEDED;
+
+ return LZMA_OK;
+}
+
+
+/// Gets the number of zero-bytes at the end of the buffer.
+static size_t
+get_padding_size(const uint8_t *buf, size_t buf_size)
+{
+ size_t padding = 0;
+ while (buf_size > 0 && buf[--buf_size] == 0x00)
+ ++padding;
+
+ return padding;
+}
+
+
+/// With the Stream Header at the very beginning of the file, LZMA_FORMAT_ERROR
+/// is used to tell the application that Magic Bytes didn't match. In other
+/// Stream Header/Footer fields (in the middle/end of the file) it could be
+/// a bit confusing to return LZMA_FORMAT_ERROR as we already know that there
+/// is a valid Stream Header at the beginning of the file. For those cases
+/// this function is used to convert LZMA_FORMAT_ERROR to LZMA_DATA_ERROR.
+static lzma_ret
+hide_format_error(lzma_ret ret)
+{
+ if (ret == LZMA_FORMAT_ERROR)
+ ret = LZMA_DATA_ERROR;
+
+ return ret;
+}
+
+
+/// Calls the Index decoder and updates coder->index_remaining.
+/// This is a separate function because the input can be either directly
+/// from the application or from coder->temp.
+static lzma_ret
+decode_index(lzma_file_info_coder *coder, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, bool update_file_cur_pos)
+{
+ const size_t in_start = *in_pos;
+
+ const lzma_ret ret = coder->index_decoder.code(
+ coder->index_decoder.coder,
+ allocator, in, in_pos, in_size,
+ NULL, NULL, 0, LZMA_RUN);
+
+ coder->index_remaining -= *in_pos - in_start;
+
+ if (update_file_cur_pos)
+ coder->file_cur_pos += *in_pos - in_start;
+
+ return ret;
+}
+
+
+static lzma_ret
+file_info_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size,
+ uint8_t *restrict out lzma_attribute((__unused__)),
+ size_t *restrict out_pos lzma_attribute((__unused__)),
+ size_t out_size lzma_attribute((__unused__)),
+ lzma_action action lzma_attribute((__unused__)))
+{
+ lzma_file_info_coder *coder = coder_ptr;
+ const size_t in_start = *in_pos;
+
+ // If the caller provides input past the end of the file, trim
+ // the extra bytes from the buffer so that we won't read too far.
+ assert(coder->file_size >= coder->file_cur_pos);
+ if (coder->file_size - coder->file_cur_pos < in_size - in_start)
+ in_size = in_start
+ + (size_t)(coder->file_size - coder->file_cur_pos);
+
+ while (true)
+ switch (coder->sequence) {
+ case SEQ_MAGIC_BYTES:
+ // Decode the Stream Header at the beginning of the file
+ // first to check if the Magic Bytes match. The flags
+ // are stored in coder->first_header_flags so that we
+ // don't need to seek to it again.
+ //
+ // Check that the file is big enough to contain at least
+ // Stream Header.
+ if (coder->file_size < LZMA_STREAM_HEADER_SIZE)
+ return LZMA_FORMAT_ERROR;
+
+ // Read the Stream Header field into coder->temp.
+ if (fill_temp(coder, in, in_pos, in_size))
+ return LZMA_OK;
+
+ // This is the only Stream Header/Footer decoding where we
+ // want to return LZMA_FORMAT_ERROR if the Magic Bytes don't
+ // match. Elsewhere it will be converted to LZMA_DATA_ERROR.
+ return_if_error(lzma_stream_header_decode(
+ &coder->first_header_flags, coder->temp));
+
+ // Now that we know that the Magic Bytes match, check the
+ // file size. It's better to do this here after checking the
+ // Magic Bytes since this way we can give LZMA_FORMAT_ERROR
+ // instead of LZMA_DATA_ERROR when the Magic Bytes don't
+ // match in a file that is too big or isn't a multiple of
+ // four bytes.
+ if (coder->file_size > LZMA_VLI_MAX || (coder->file_size & 3))
+ return LZMA_DATA_ERROR;
+
+ // Start looking for Stream Padding and Stream Footer
+ // at the end of the file.
+ coder->file_target_pos = coder->file_size;
+
+ // Fall through
+
+ case SEQ_PADDING_SEEK:
+ coder->sequence = SEQ_PADDING_DECODE;
+ return_if_error(reverse_seek(
+ coder, in_start, in_pos, in_size));
+
+ // Fall through
+
+ case SEQ_PADDING_DECODE: {
+ // Copy to coder->temp first. This keeps the code simpler if
+ // the application only provides input a few bytes at a time.
+ if (fill_temp(coder, in, in_pos, in_size))
+ return LZMA_OK;
+
+ // Scan the buffer backwards to get the size of the
+ // Stream Padding field (if any).
+ const size_t new_padding = get_padding_size(
+ coder->temp, coder->temp_size);
+ coder->stream_padding += new_padding;
+
+ // Set the target position to the beginning of Stream Padding
+ // that has been observed so far. If all Stream Padding has
+ // been seen, then the target position will be at the end
+ // of the Stream Footer field.
+ coder->file_target_pos -= new_padding;
+
+ if (new_padding == coder->temp_size) {
+ // The whole buffer was padding. Seek backwards in
+ // the file to get more input.
+ coder->sequence = SEQ_PADDING_SEEK;
+ break;
+ }
+
+ // Size of Stream Padding must be a multiple of 4 bytes.
+ if (coder->stream_padding & 3)
+ return LZMA_DATA_ERROR;
+
+ coder->sequence = SEQ_FOOTER;
+
+ // Calculate the amount of non-padding data in coder->temp.
+ coder->temp_size -= new_padding;
+ coder->temp_pos = coder->temp_size;
+
+ // We can avoid an external seek if the whole Stream Footer
+ // is already in coder->temp. In that case SEQ_FOOTER won't
+ // read more input and will find the Stream Footer from
+ // coder->temp[coder->temp_size - LZMA_STREAM_HEADER_SIZE].
+ //
+ // Otherwise we will need to seek. The seeking is done so
+ // that Stream Footer will be at the end of coder->temp.
+ // This way it's likely that we also get a complete Index
+ // field into coder->temp without needing a separate seek
+ // for that (unless the Index field is big).
+ if (coder->temp_size < LZMA_STREAM_HEADER_SIZE)
+ return_if_error(reverse_seek(
+ coder, in_start, in_pos, in_size));
+ }
+
+ // Fall through
+
+ case SEQ_FOOTER:
+ // Copy the Stream Footer field into coder->temp.
+ // If Stream Footer was already available in coder->temp
+ // in SEQ_PADDING_DECODE, then this does nothing.
+ if (fill_temp(coder, in, in_pos, in_size))
+ return LZMA_OK;
+
+ // Make coder->file_target_pos and coder->temp_size point
+ // to the beginning of Stream Footer and thus to the end
+ // of the Index field. coder->temp_pos will be updated
+ // a bit later.
+ coder->file_target_pos -= LZMA_STREAM_HEADER_SIZE;
+ coder->temp_size -= LZMA_STREAM_HEADER_SIZE;
+
+ // Decode Stream Footer.
+ return_if_error(hide_format_error(lzma_stream_footer_decode(
+ &coder->footer_flags,
+ coder->temp + coder->temp_size)));
+
+ // Check that we won't seek past the beginning of the file.
+ //
+ // LZMA_STREAM_HEADER_SIZE is added because there must be
+ // space for Stream Header too even though we won't seek
+ // there before decoding the Index field.
+ //
+ // There's no risk of integer overflow here because
+ // Backward Size cannot be greater than 2^34.
+ if (coder->file_target_pos < coder->footer_flags.backward_size
+ + LZMA_STREAM_HEADER_SIZE)
+ return LZMA_DATA_ERROR;
+
+ // Set the target position to the beginning of the Index field.
+ coder->file_target_pos -= coder->footer_flags.backward_size;
+ coder->sequence = SEQ_INDEX_INIT;
+
+ // We can avoid an external seek if the whole Index field is
+ // already available in coder->temp.
+ if (coder->temp_size >= coder->footer_flags.backward_size) {
+ // Set coder->temp_pos to point to the beginning
+ // of the Index.
+ coder->temp_pos = coder->temp_size
+ - coder->footer_flags.backward_size;
+ } else {
+ // These are set to zero to indicate that there's no
+ // useful data (Index or anything else) in coder->temp.
+ coder->temp_pos = 0;
+ coder->temp_size = 0;
+
+ // Seek to the beginning of the Index field.
+ if (seek_to_pos(coder, coder->file_target_pos,
+ in_start, in_pos, in_size))
+ return LZMA_SEEK_NEEDED;
+ }
+
+ // Fall through
+
+ case SEQ_INDEX_INIT: {
+ // Calculate the amount of memory already used by the earlier
+ // Indexes so that we know how big memory limit to pass to
+ // the Index decoder.
+ //
+ // NOTE: When there are multiple Streams, the separate
+ // lzma_index structures can use more RAM (as measured by
+ // lzma_index_memused()) than the final combined lzma_index.
+ // Thus memlimit may need to be slightly higher than the final
+ // calculated memory usage will be. This is perhaps a bit
+ // confusing to the application, but I think it shouldn't
+ // cause problems in practice.
+ uint64_t memused = 0;
+ if (coder->combined_index != NULL) {
+ memused = lzma_index_memused(coder->combined_index);
+ assert(memused <= coder->memlimit);
+ if (memused > coder->memlimit) // Extra sanity check
+ return LZMA_PROG_ERROR;
+ }
+
+ // Initialize the Index decoder.
+ return_if_error(lzma_index_decoder_init(
+ &coder->index_decoder, allocator,
+ &coder->this_index,
+ coder->memlimit - memused));
+
+ coder->index_remaining = coder->footer_flags.backward_size;
+ coder->sequence = SEQ_INDEX_DECODE;
+ }
+
+ // Fall through
+
+ case SEQ_INDEX_DECODE: {
+ // Decode (a part of) the Index. If the whole Index is already
+ // in coder->temp, read it from there. Otherwise read from
+ // in[*in_pos] onwards. Note that index_decode() updates
+ // coder->index_remaining and optionally coder->file_cur_pos.
+ lzma_ret ret;
+ if (coder->temp_size != 0) {
+ assert(coder->temp_size - coder->temp_pos
+ == coder->index_remaining);
+ ret = decode_index(coder, allocator, coder->temp,
+ &coder->temp_pos, coder->temp_size,
+ false);
+ } else {
+ // Don't give the decoder more input than the known
+ // remaining size of the Index field.
+ size_t in_stop = in_size;
+ if (in_size - *in_pos > coder->index_remaining)
+ in_stop = *in_pos
+ + (size_t)(coder->index_remaining);
+
+ ret = decode_index(coder, allocator,
+ in, in_pos, in_stop, true);
+ }
+
+ switch (ret) {
+ case LZMA_OK:
+ // If the Index docoder asks for more input when we
+ // have already given it as much input as Backward Size
+ // indicated, the file is invalid.
+ if (coder->index_remaining == 0)
+ return LZMA_DATA_ERROR;
+
+ // We cannot get here if we were reading Index from
+ // coder->temp because when reading from coder->temp
+ // we give the Index decoder exactly
+ // coder->index_remaining bytes of input.
+ assert(coder->temp_size == 0);
+
+ return LZMA_OK;
+
+ case LZMA_STREAM_END:
+ // If the decoding seems to be successful, check also
+ // that the Index decoder consumed as much input as
+ // indicated by the Backward Size field.
+ if (coder->index_remaining != 0)
+ return LZMA_DATA_ERROR;
+
+ break;
+
+ default:
+ return ret;
+ }
+
+ // Calculate how much the Index tells us to seek backwards
+ // (relative to the beginning of the Index): Total size of
+ // all Blocks plus the size of the Stream Header field.
+ // No integer overflow here because lzma_index_total_size()
+ // cannot return a value greater than LZMA_VLI_MAX.
+ const uint64_t seek_amount
+ = lzma_index_total_size(coder->this_index)
+ + LZMA_STREAM_HEADER_SIZE;
+
+ // Check that Index is sane in sense that seek_amount won't
+ // make us seek past the beginning of the file when locating
+ // the Stream Header.
+ //
+ // coder->file_target_pos still points to the beginning of
+ // the Index field.
+ if (coder->file_target_pos < seek_amount)
+ return LZMA_DATA_ERROR;
+
+ // Set the target to the beginning of Stream Header.
+ coder->file_target_pos -= seek_amount;
+
+ if (coder->file_target_pos == 0) {
+ // We would seek to the beginning of the file, but
+ // since we already decoded that Stream Header in
+ // SEQ_MAGIC_BYTES, we can use the cached value from
+ // coder->first_header_flags to avoid the seek.
+ coder->header_flags = coder->first_header_flags;
+ coder->sequence = SEQ_HEADER_COMPARE;
+ break;
+ }
+
+ coder->sequence = SEQ_HEADER_DECODE;
+
+ // Make coder->file_target_pos point to the end of
+ // the Stream Header field.
+ coder->file_target_pos += LZMA_STREAM_HEADER_SIZE;
+
+ // If coder->temp_size is non-zero, it points to the end
+ // of the Index field. Then the beginning of the Index
+ // field is at coder->temp[coder->temp_size
+ // - coder->footer_flags.backward_size].
+ assert(coder->temp_size == 0 || coder->temp_size
+ >= coder->footer_flags.backward_size);
+
+ // If coder->temp contained the whole Index, see if it has
+ // enough data to contain also the Stream Header. If so,
+ // we avoid an external seek.
+ //
+ // NOTE: This can happen only with small .xz files and only
+ // for the non-first Stream as the Stream Flags of the first
+ // Stream are cached and already handled a few lines above.
+ // So this isn't as useful as the other seek-avoidance cases.
+ if (coder->temp_size != 0 && coder->temp_size
+ - coder->footer_flags.backward_size
+ >= seek_amount) {
+ // Make temp_pos and temp_size point to the *end* of
+ // Stream Header so that SEQ_HEADER_DECODE will find
+ // the start of Stream Header from coder->temp[
+ // coder->temp_size - LZMA_STREAM_HEADER_SIZE].
+ coder->temp_pos = coder->temp_size
+ - coder->footer_flags.backward_size
+ - seek_amount
+ + LZMA_STREAM_HEADER_SIZE;
+ coder->temp_size = coder->temp_pos;
+ } else {
+ // Seek so that Stream Header will be at the end of
+ // coder->temp. With typical multi-Stream files we
+ // will usually also get the Stream Footer and Index
+ // of the *previous* Stream in coder->temp and thus
+ // won't need a separate seek for them.
+ return_if_error(reverse_seek(coder,
+ in_start, in_pos, in_size));
+ }
+ }
+
+ // Fall through
+
+ case SEQ_HEADER_DECODE:
+ // Copy the Stream Header field into coder->temp.
+ // If Stream Header was already available in coder->temp
+ // in SEQ_INDEX_DECODE, then this does nothing.
+ if (fill_temp(coder, in, in_pos, in_size))
+ return LZMA_OK;
+
+ // Make all these point to the beginning of Stream Header.
+ coder->file_target_pos -= LZMA_STREAM_HEADER_SIZE;
+ coder->temp_size -= LZMA_STREAM_HEADER_SIZE;
+ coder->temp_pos = coder->temp_size;
+
+ // Decode the Stream Header.
+ return_if_error(hide_format_error(lzma_stream_header_decode(
+ &coder->header_flags,
+ coder->temp + coder->temp_size)));
+
+ coder->sequence = SEQ_HEADER_COMPARE;
+
+ // Fall through
+
+ case SEQ_HEADER_COMPARE:
+ // Compare Stream Header against Stream Footer. They must
+ // match.
+ return_if_error(lzma_stream_flags_compare(
+ &coder->header_flags, &coder->footer_flags));
+
+ // Store the decoded Stream Flags into the Index. Use the
+ // Footer Flags because it contains Backward Size, although
+ // it shouldn't matter in practice.
+ if (lzma_index_stream_flags(coder->this_index,
+ &coder->footer_flags) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ // Store also the size of the Stream Padding field. It is
+ // needed to calculate the offsets of the Streams correctly.
+ if (lzma_index_stream_padding(coder->this_index,
+ coder->stream_padding) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ // Reset it so that it's ready for the next Stream.
+ coder->stream_padding = 0;
+
+ // Append the earlier decoded Indexes after this_index.
+ if (coder->combined_index != NULL)
+ return_if_error(lzma_index_cat(coder->this_index,
+ coder->combined_index, allocator));
+
+ coder->combined_index = coder->this_index;
+ coder->this_index = NULL;
+
+ // If the whole file was decoded, tell the caller that we
+ // are finished.
+ if (coder->file_target_pos == 0) {
+ // The combined index must indicate the same file
+ // size as was told to us at initialization.
+ assert(lzma_index_file_size(coder->combined_index)
+ == coder->file_size);
+
+ // Make the combined index available to
+ // the application.
+ *coder->dest_index = coder->combined_index;
+ coder->combined_index = NULL;
+
+ // Mark the input buffer as used since we may have
+ // done internal seeking and thus don't know how
+ // many input bytes were actually used. This way
+ // lzma_stream.total_in gets a slightly better
+ // estimate of the amount of input used.
+ *in_pos = in_size;
+ return LZMA_STREAM_END;
+ }
+
+ // We didn't hit the beginning of the file yet, so continue
+ // reading backwards in the file. If we have unprocessed
+ // data in coder->temp, use it before requesting more data
+ // from the application.
+ //
+ // coder->file_target_pos, coder->temp_size, and
+ // coder->temp_pos all point to the beginning of Stream Header
+ // and thus the end of the previous Stream in the file.
+ coder->sequence = coder->temp_size > 0
+ ? SEQ_PADDING_DECODE : SEQ_PADDING_SEEK;
+ break;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+}
+
+
+static lzma_ret
+file_info_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_file_info_coder *coder = coder_ptr;
+
+ // The memory usage calculation comes from three things:
+ //
+ // (1) The Indexes that have already been decoded and processed into
+ // coder->combined_index.
+ //
+ // (2) The latest Index in coder->this_index that has been decoded but
+ // not yet put into coder->combined_index.
+ //
+ // (3) The latest Index that we have started decoding but haven't
+ // finished and thus isn't available in coder->this_index yet.
+ // Memory usage and limit information needs to be communicated
+ // from/to coder->index_decoder.
+ //
+ // Care has to be taken to not do both (2) and (3) when calculating
+ // the memory usage.
+ uint64_t combined_index_memusage = 0;
+ uint64_t this_index_memusage = 0;
+
+ // (1) If we have already successfully decoded one or more Indexes,
+ // get their memory usage.
+ if (coder->combined_index != NULL)
+ combined_index_memusage = lzma_index_memused(
+ coder->combined_index);
+
+ // Choose between (2), (3), or neither.
+ if (coder->this_index != NULL) {
+ // (2) The latest Index is available. Use its memory usage.
+ this_index_memusage = lzma_index_memused(coder->this_index);
+
+ } else if (coder->sequence == SEQ_INDEX_DECODE) {
+ // (3) The Index decoder is activate and hasn't yet stored
+ // the new index in coder->this_index. Get the memory usage
+ // information from the Index decoder.
+ //
+ // NOTE: If the Index decoder doesn't yet know how much memory
+ // it will eventually need, it will return a tiny value here.
+ uint64_t dummy;
+ if (coder->index_decoder.memconfig(coder->index_decoder.coder,
+ &this_index_memusage, &dummy, 0)
+ != LZMA_OK) {
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+ }
+
+ // Now we know the total memory usage/requirement. If we had neither
+ // old Indexes nor a new Index, this will be zero which isn't
+ // acceptable as lzma_memusage() has to return non-zero on success
+ // and even with an empty .xz file we will end up with a lzma_index
+ // that takes some memory.
+ *memusage = combined_index_memusage + this_index_memusage;
+ if (*memusage == 0)
+ *memusage = lzma_index_memusage(1, 0);
+
+ *old_memlimit = coder->memlimit;
+
+ // If requested, set a new memory usage limit.
+ if (new_memlimit != 0) {
+ if (new_memlimit < *memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ // In the condition (3) we need to tell the Index decoder
+ // its new memory usage limit.
+ if (coder->this_index == NULL
+ && coder->sequence == SEQ_INDEX_DECODE) {
+ const uint64_t idec_new_memlimit = new_memlimit
+ - combined_index_memusage;
+
+ assert(this_index_memusage > 0);
+ assert(idec_new_memlimit > 0);
+
+ uint64_t dummy1;
+ uint64_t dummy2;
+
+ if (coder->index_decoder.memconfig(
+ coder->index_decoder.coder,
+ &dummy1, &dummy2, idec_new_memlimit)
+ != LZMA_OK) {
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+ }
+
+ coder->memlimit = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+file_info_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_file_info_coder *coder = coder_ptr;
+
+ lzma_next_end(&coder->index_decoder, allocator);
+ lzma_index_end(coder->this_index, allocator);
+ lzma_index_end(coder->combined_index, allocator);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+lzma_file_info_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator, uint64_t *seek_pos,
+ lzma_index **dest_index,
+ uint64_t memlimit, uint64_t file_size)
+{
+ lzma_next_coder_init(&lzma_file_info_decoder_init, next, allocator);
+
+ if (dest_index == NULL)
+ return LZMA_PROG_ERROR;
+
+ lzma_file_info_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_file_info_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &file_info_decode;
+ next->end = &file_info_decoder_end;
+ next->memconfig = &file_info_decoder_memconfig;
+
+ coder->index_decoder = LZMA_NEXT_CODER_INIT;
+ coder->this_index = NULL;
+ coder->combined_index = NULL;
+ }
+
+ coder->sequence = SEQ_MAGIC_BYTES;
+ coder->file_cur_pos = 0;
+ coder->file_target_pos = 0;
+ coder->file_size = file_size;
+
+ lzma_index_end(coder->this_index, allocator);
+ coder->this_index = NULL;
+
+ lzma_index_end(coder->combined_index, allocator);
+ coder->combined_index = NULL;
+
+ coder->stream_padding = 0;
+
+ coder->dest_index = dest_index;
+ coder->external_seek_pos = seek_pos;
+
+ // If memlimit is 0, make it 1 to ensure that lzma_memlimit_get()
+ // won't return 0 (which would indicate an error).
+ coder->memlimit = my_max(1, memlimit);
+
+ // Prepare these for reading the first Stream Header into coder->temp.
+ coder->temp_pos = 0;
+ coder->temp_size = LZMA_STREAM_HEADER_SIZE;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_file_info_decoder(lzma_stream *strm, lzma_index **dest_index,
+ uint64_t memlimit, uint64_t file_size)
+{
+ lzma_next_strm_init(lzma_file_info_decoder_init, strm, &strm->seek_pos,
+ dest_index, memlimit, file_size);
+
+ // We allow LZMA_FINISH in addition to LZMA_RUN for convenience.
+ // lzma_code() is able to handle the LZMA_FINISH + LZMA_SEEK_NEEDED
+ // combination in a sane way. Applications still need to be careful
+ // if they use LZMA_FINISH so that they remember to reset it back
+ // to LZMA_RUN after seeking if needed.
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/filter_buffer_decoder.c b/src/liblzma/common/filter_buffer_decoder.c
new file mode 100644
index 0000000..6620986
--- /dev/null
+++ b/src/liblzma/common/filter_buffer_decoder.c
@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_buffer_decoder.c
+/// \brief Single-call raw decoding
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_decoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_raw_buffer_decode(
+ const lzma_filter *filters, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Validate what isn't validated later in filter_common.c.
+ if (in == NULL || in_pos == NULL || *in_pos > in_size || out == NULL
+ || out_pos == NULL || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the decoer.
+ lzma_next_coder next = LZMA_NEXT_CODER_INIT;
+ return_if_error(lzma_raw_decoder_init(&next, allocator, filters));
+
+ // Store the positions so that we can restore them if something
+ // goes wrong.
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ // Do the actual decoding and free decoder's memory.
+ lzma_ret ret = next.code(next.coder, allocator, in, in_pos, in_size,
+ out, out_pos, out_size, LZMA_FINISH);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ if (ret == LZMA_OK) {
+ // Either the input was truncated or the
+ // output buffer was too small.
+ assert(*in_pos == in_size || *out_pos == out_size);
+
+ if (*in_pos != in_size) {
+ // Since input wasn't consumed completely,
+ // the output buffer became full and is
+ // too small.
+ ret = LZMA_BUF_ERROR;
+
+ } else if (*out_pos != out_size) {
+ // Since output didn't became full, the input
+ // has to be truncated.
+ ret = LZMA_DATA_ERROR;
+
+ } else {
+ // All the input was consumed and output
+ // buffer is full. Now we don't immediately
+ // know the reason for the error. Try
+ // decoding one more byte. If it succeeds,
+ // then the output buffer was too small. If
+ // we cannot get a new output byte, the input
+ // is truncated.
+ uint8_t tmp[1];
+ size_t tmp_pos = 0;
+ (void)next.code(next.coder, allocator,
+ in, in_pos, in_size,
+ tmp, &tmp_pos, 1, LZMA_FINISH);
+
+ if (tmp_pos == 1)
+ ret = LZMA_BUF_ERROR;
+ else
+ ret = LZMA_DATA_ERROR;
+ }
+ }
+
+ // Restore the positions.
+ *in_pos = in_start;
+ *out_pos = out_start;
+ }
+
+ lzma_next_end(&next, allocator);
+
+ return ret;
+}
diff --git a/src/liblzma/common/filter_buffer_encoder.c b/src/liblzma/common/filter_buffer_encoder.c
new file mode 100644
index 0000000..dda18e3
--- /dev/null
+++ b/src/liblzma/common/filter_buffer_encoder.c
@@ -0,0 +1,55 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_buffer_encoder.c
+/// \brief Single-call raw encoding
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_encoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_raw_buffer_encode(
+ const lzma_filter *filters, const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Validate what isn't validated later in filter_common.c.
+ if ((in == NULL && in_size != 0) || out == NULL
+ || out_pos == NULL || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the encoder
+ lzma_next_coder next = LZMA_NEXT_CODER_INIT;
+ return_if_error(lzma_raw_encoder_init(&next, allocator, filters));
+
+ // Store the output position so that we can restore it if
+ // something goes wrong.
+ const size_t out_start = *out_pos;
+
+ // Do the actual encoding and free coder's memory.
+ size_t in_pos = 0;
+ lzma_ret ret = next.code(next.coder, allocator, in, &in_pos, in_size,
+ out, out_pos, out_size, LZMA_FINISH);
+ lzma_next_end(&next, allocator);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ if (ret == LZMA_OK) {
+ // Output buffer was too small.
+ assert(*out_pos == out_size);
+ ret = LZMA_BUF_ERROR;
+ }
+
+ // Restore the output position.
+ *out_pos = out_start;
+ }
+
+ return ret;
+}
diff --git a/src/liblzma/common/filter_common.c b/src/liblzma/common/filter_common.c
new file mode 100644
index 0000000..fa0927c
--- /dev/null
+++ b/src/liblzma/common/filter_common.c
@@ -0,0 +1,385 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_common.c
+/// \brief Filter-specific stuff common for both encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_common.h"
+
+
+static const struct {
+ /// Filter ID
+ lzma_vli id;
+
+ /// Size of the filter-specific options structure
+ size_t options_size;
+
+ /// True if it is OK to use this filter as non-last filter in
+ /// the chain.
+ bool non_last_ok;
+
+ /// True if it is OK to use this filter as the last filter in
+ /// the chain.
+ bool last_ok;
+
+ /// True if the filter may change the size of the data (that is, the
+ /// amount of encoded output can be different than the amount of
+ /// uncompressed input).
+ bool changes_size;
+
+} features[] = {
+#if defined (HAVE_ENCODER_LZMA1) || defined(HAVE_DECODER_LZMA1)
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .options_size = sizeof(lzma_options_lzma),
+ .non_last_ok = false,
+ .last_ok = true,
+ .changes_size = true,
+ },
+ {
+ .id = LZMA_FILTER_LZMA1EXT,
+ .options_size = sizeof(lzma_options_lzma),
+ .non_last_ok = false,
+ .last_ok = true,
+ .changes_size = true,
+ },
+#endif
+#if defined(HAVE_ENCODER_LZMA2) || defined(HAVE_DECODER_LZMA2)
+ {
+ .id = LZMA_FILTER_LZMA2,
+ .options_size = sizeof(lzma_options_lzma),
+ .non_last_ok = false,
+ .last_ok = true,
+ .changes_size = true,
+ },
+#endif
+#if defined(HAVE_ENCODER_X86) || defined(HAVE_DECODER_X86)
+ {
+ .id = LZMA_FILTER_X86,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_POWERPC) || defined(HAVE_DECODER_POWERPC)
+ {
+ .id = LZMA_FILTER_POWERPC,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_IA64) || defined(HAVE_DECODER_IA64)
+ {
+ .id = LZMA_FILTER_IA64,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_ARM) || defined(HAVE_DECODER_ARM)
+ {
+ .id = LZMA_FILTER_ARM,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_ARMTHUMB) || defined(HAVE_DECODER_ARMTHUMB)
+ {
+ .id = LZMA_FILTER_ARMTHUMB,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_ARM64) || defined(HAVE_DECODER_ARM64)
+ {
+ .id = LZMA_FILTER_ARM64,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_SPARC) || defined(HAVE_DECODER_SPARC)
+ {
+ .id = LZMA_FILTER_SPARC,
+ .options_size = sizeof(lzma_options_bcj),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+#if defined(HAVE_ENCODER_DELTA) || defined(HAVE_DECODER_DELTA)
+ {
+ .id = LZMA_FILTER_DELTA,
+ .options_size = sizeof(lzma_options_delta),
+ .non_last_ok = true,
+ .last_ok = false,
+ .changes_size = false,
+ },
+#endif
+ {
+ .id = LZMA_VLI_UNKNOWN
+ }
+};
+
+
+extern LZMA_API(lzma_ret)
+lzma_filters_copy(const lzma_filter *src, lzma_filter *real_dest,
+ const lzma_allocator *allocator)
+{
+ if (src == NULL || real_dest == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Use a temporary destination so that the real destination
+ // will never be modied if an error occurs.
+ lzma_filter dest[LZMA_FILTERS_MAX + 1];
+
+ lzma_ret ret;
+ size_t i;
+ for (i = 0; src[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ // There must be a maximum of four filters plus
+ // the array terminator.
+ if (i == LZMA_FILTERS_MAX) {
+ ret = LZMA_OPTIONS_ERROR;
+ goto error;
+ }
+
+ dest[i].id = src[i].id;
+
+ if (src[i].options == NULL) {
+ dest[i].options = NULL;
+ } else {
+ // See if the filter is supported only when the
+ // options is not NULL. This might be convenient
+ // sometimes if the app is actually copying only
+ // a partial filter chain with a place holder ID.
+ //
+ // When options is not NULL, the Filter ID must be
+ // supported by us, because otherwise we don't know
+ // how big the options are.
+ size_t j;
+ for (j = 0; src[i].id != features[j].id; ++j) {
+ if (features[j].id == LZMA_VLI_UNKNOWN) {
+ ret = LZMA_OPTIONS_ERROR;
+ goto error;
+ }
+ }
+
+ // Allocate and copy the options.
+ dest[i].options = lzma_alloc(features[j].options_size,
+ allocator);
+ if (dest[i].options == NULL) {
+ ret = LZMA_MEM_ERROR;
+ goto error;
+ }
+
+ memcpy(dest[i].options, src[i].options,
+ features[j].options_size);
+ }
+ }
+
+ // Terminate the filter array.
+ assert(i < LZMA_FILTERS_MAX + 1);
+ dest[i].id = LZMA_VLI_UNKNOWN;
+ dest[i].options = NULL;
+
+ // Copy it to the caller-supplied array now that we know that
+ // no errors occurred.
+ memcpy(real_dest, dest, (i + 1) * sizeof(lzma_filter));
+
+ return LZMA_OK;
+
+error:
+ // Free the options which we have already allocated.
+ while (i-- > 0)
+ lzma_free(dest[i].options, allocator);
+
+ return ret;
+}
+
+
+extern LZMA_API(void)
+lzma_filters_free(lzma_filter *filters, const lzma_allocator *allocator)
+{
+ if (filters == NULL)
+ return;
+
+ for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ if (i == LZMA_FILTERS_MAX) {
+ // The API says that LZMA_FILTERS_MAX + 1 is the
+ // maximum allowed size including the terminating
+ // element. Thus, we should never get here but in
+ // case there is a bug and we do anyway, don't go
+ // past the (probable) end of the array.
+ assert(0);
+ break;
+ }
+
+ lzma_free(filters[i].options, allocator);
+ filters[i].options = NULL;
+ filters[i].id = LZMA_VLI_UNKNOWN;
+ }
+
+ return;
+}
+
+
+extern lzma_ret
+lzma_validate_chain(const lzma_filter *filters, size_t *count)
+{
+ // There must be at least one filter.
+ if (filters == NULL || filters[0].id == LZMA_VLI_UNKNOWN)
+ return LZMA_PROG_ERROR;
+
+ // Number of non-last filters that may change the size of the data
+ // significantly (that is, more than 1-2 % or so).
+ size_t changes_size_count = 0;
+
+ // True if it is OK to add a new filter after the current filter.
+ bool non_last_ok = true;
+
+ // True if the last filter in the given chain is actually usable as
+ // the last filter. Only filters that support embedding End of Payload
+ // Marker can be used as the last filter in the chain.
+ bool last_ok = false;
+
+ size_t i = 0;
+ do {
+ size_t j;
+ for (j = 0; filters[i].id != features[j].id; ++j)
+ if (features[j].id == LZMA_VLI_UNKNOWN)
+ return LZMA_OPTIONS_ERROR;
+
+ // If the previous filter in the chain cannot be a non-last
+ // filter, the chain is invalid.
+ if (!non_last_ok)
+ return LZMA_OPTIONS_ERROR;
+
+ non_last_ok = features[j].non_last_ok;
+ last_ok = features[j].last_ok;
+ changes_size_count += features[j].changes_size;
+
+ } while (filters[++i].id != LZMA_VLI_UNKNOWN);
+
+ // There must be 1-4 filters. The last filter must be usable as
+ // the last filter in the chain. A maximum of three filters are
+ // allowed to change the size of the data.
+ if (i > LZMA_FILTERS_MAX || !last_ok || changes_size_count > 3)
+ return LZMA_OPTIONS_ERROR;
+
+ *count = i;
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_raw_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *options,
+ lzma_filter_find coder_find, bool is_encoder)
+{
+ // Do some basic validation and get the number of filters.
+ size_t count;
+ return_if_error(lzma_validate_chain(options, &count));
+
+ // Set the filter functions and copy the options pointer.
+ lzma_filter_info filters[LZMA_FILTERS_MAX + 1];
+ if (is_encoder) {
+ for (size_t i = 0; i < count; ++i) {
+ // The order of the filters is reversed in the
+ // encoder. It allows more efficient handling
+ // of the uncompressed data.
+ const size_t j = count - i - 1;
+
+ const lzma_filter_coder *const fc
+ = coder_find(options[i].id);
+ if (fc == NULL || fc->init == NULL)
+ return LZMA_OPTIONS_ERROR;
+
+ filters[j].id = options[i].id;
+ filters[j].init = fc->init;
+ filters[j].options = options[i].options;
+ }
+ } else {
+ for (size_t i = 0; i < count; ++i) {
+ const lzma_filter_coder *const fc
+ = coder_find(options[i].id);
+ if (fc == NULL || fc->init == NULL)
+ return LZMA_OPTIONS_ERROR;
+
+ filters[i].id = options[i].id;
+ filters[i].init = fc->init;
+ filters[i].options = options[i].options;
+ }
+ }
+
+ // Terminate the array.
+ filters[count].id = LZMA_VLI_UNKNOWN;
+ filters[count].init = NULL;
+
+ // Initialize the filters.
+ const lzma_ret ret = lzma_next_filter_init(next, allocator, filters);
+ if (ret != LZMA_OK)
+ lzma_next_end(next, allocator);
+
+ return ret;
+}
+
+
+extern uint64_t
+lzma_raw_coder_memusage(lzma_filter_find coder_find,
+ const lzma_filter *filters)
+{
+ // The chain has to have at least one filter.
+ {
+ size_t tmp;
+ if (lzma_validate_chain(filters, &tmp) != LZMA_OK)
+ return UINT64_MAX;
+ }
+
+ uint64_t total = 0;
+ size_t i = 0;
+
+ do {
+ const lzma_filter_coder *const fc
+ = coder_find(filters[i].id);
+ if (fc == NULL)
+ return UINT64_MAX; // Unsupported Filter ID
+
+ if (fc->memusage == NULL) {
+ // This filter doesn't have a function to calculate
+ // the memory usage and validate the options. Such
+ // filters need only little memory, so we use 1 KiB
+ // as a good estimate. They also accept all possible
+ // options, so there's no need to worry about lack
+ // of validation.
+ total += 1024;
+ } else {
+ // Call the filter-specific memory usage calculation
+ // function.
+ const uint64_t usage
+ = fc->memusage(filters[i].options);
+ if (usage == UINT64_MAX)
+ return UINT64_MAX; // Invalid options
+
+ total += usage;
+ }
+ } while (filters[++i].id != LZMA_VLI_UNKNOWN);
+
+ // Add some fixed amount of extra. It's to compensate memory usage
+ // of Stream, Block etc. coders, malloc() overhead, stack etc.
+ return total + LZMA_MEMUSAGE_BASE;
+}
diff --git a/src/liblzma/common/filter_common.h b/src/liblzma/common/filter_common.h
new file mode 100644
index 0000000..2e47bb6
--- /dev/null
+++ b/src/liblzma/common/filter_common.h
@@ -0,0 +1,51 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_common.h
+/// \brief Filter-specific stuff common for both encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_FILTER_COMMON_H
+#define LZMA_FILTER_COMMON_H
+
+#include "common.h"
+
+
+/// Both lzma_filter_encoder and lzma_filter_decoder begin with these members.
+typedef struct {
+ /// Filter ID
+ lzma_vli id;
+
+ /// Initializes the filter encoder and calls lzma_next_filter_init()
+ /// for filters + 1.
+ lzma_init_function init;
+
+ /// Calculates memory usage of the encoder. If the options are
+ /// invalid, UINT64_MAX is returned.
+ uint64_t (*memusage)(const void *options);
+
+} lzma_filter_coder;
+
+
+typedef const lzma_filter_coder *(*lzma_filter_find)(lzma_vli id);
+
+
+extern lzma_ret lzma_validate_chain(const lzma_filter *filters, size_t *count);
+
+
+extern lzma_ret lzma_raw_coder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *filters,
+ lzma_filter_find coder_find, bool is_encoder);
+
+
+extern uint64_t lzma_raw_coder_memusage(lzma_filter_find coder_find,
+ const lzma_filter *filters);
+
+
+#endif
diff --git a/src/liblzma/common/filter_decoder.c b/src/liblzma/common/filter_decoder.c
new file mode 100644
index 0000000..fa53f5b
--- /dev/null
+++ b/src/liblzma/common/filter_decoder.c
@@ -0,0 +1,198 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_decoder.c
+/// \brief Filter ID mapping to filter-specific functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_decoder.h"
+#include "filter_common.h"
+#include "lzma_decoder.h"
+#include "lzma2_decoder.h"
+#include "simple_decoder.h"
+#include "delta_decoder.h"
+
+
+typedef struct {
+ /// Filter ID
+ lzma_vli id;
+
+ /// Initializes the filter encoder and calls lzma_next_filter_init()
+ /// for filters + 1.
+ lzma_init_function init;
+
+ /// Calculates memory usage of the encoder. If the options are
+ /// invalid, UINT64_MAX is returned.
+ uint64_t (*memusage)(const void *options);
+
+ /// Decodes Filter Properties.
+ ///
+ /// \return - LZMA_OK: Properties decoded successfully.
+ /// - LZMA_OPTIONS_ERROR: Unsupported properties
+ /// - LZMA_MEM_ERROR: Memory allocation failed.
+ lzma_ret (*props_decode)(
+ void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size);
+
+} lzma_filter_decoder;
+
+
+static const lzma_filter_decoder decoders[] = {
+#ifdef HAVE_DECODER_LZMA1
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .init = &lzma_lzma_decoder_init,
+ .memusage = &lzma_lzma_decoder_memusage,
+ .props_decode = &lzma_lzma_props_decode,
+ },
+ {
+ .id = LZMA_FILTER_LZMA1EXT,
+ .init = &lzma_lzma_decoder_init,
+ .memusage = &lzma_lzma_decoder_memusage,
+ .props_decode = &lzma_lzma_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_LZMA2
+ {
+ .id = LZMA_FILTER_LZMA2,
+ .init = &lzma_lzma2_decoder_init,
+ .memusage = &lzma_lzma2_decoder_memusage,
+ .props_decode = &lzma_lzma2_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_X86
+ {
+ .id = LZMA_FILTER_X86,
+ .init = &lzma_simple_x86_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_POWERPC
+ {
+ .id = LZMA_FILTER_POWERPC,
+ .init = &lzma_simple_powerpc_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_IA64
+ {
+ .id = LZMA_FILTER_IA64,
+ .init = &lzma_simple_ia64_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_ARM
+ {
+ .id = LZMA_FILTER_ARM,
+ .init = &lzma_simple_arm_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_ARMTHUMB
+ {
+ .id = LZMA_FILTER_ARMTHUMB,
+ .init = &lzma_simple_armthumb_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_ARM64
+ {
+ .id = LZMA_FILTER_ARM64,
+ .init = &lzma_simple_arm64_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_SPARC
+ {
+ .id = LZMA_FILTER_SPARC,
+ .init = &lzma_simple_sparc_decoder_init,
+ .memusage = NULL,
+ .props_decode = &lzma_simple_props_decode,
+ },
+#endif
+#ifdef HAVE_DECODER_DELTA
+ {
+ .id = LZMA_FILTER_DELTA,
+ .init = &lzma_delta_decoder_init,
+ .memusage = &lzma_delta_coder_memusage,
+ .props_decode = &lzma_delta_props_decode,
+ },
+#endif
+};
+
+
+static const lzma_filter_decoder *
+decoder_find(lzma_vli id)
+{
+ for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i)
+ if (decoders[i].id == id)
+ return decoders + i;
+
+ return NULL;
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_filter_decoder_is_supported(lzma_vli id)
+{
+ return decoder_find(id) != NULL;
+}
+
+
+extern lzma_ret
+lzma_raw_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *options)
+{
+ return lzma_raw_coder_init(next, allocator,
+ options, (lzma_filter_find)(&decoder_find), false);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_raw_decoder(lzma_stream *strm, const lzma_filter *options)
+{
+ lzma_next_strm_init(lzma_raw_decoder_init, strm, options);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_raw_decoder_memusage(const lzma_filter *filters)
+{
+ return lzma_raw_coder_memusage(
+ (lzma_filter_find)(&decoder_find), filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_properties_decode(lzma_filter *filter, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ // Make it always NULL so that the caller can always safely free() it.
+ filter->options = NULL;
+
+ const lzma_filter_decoder *const fd = decoder_find(filter->id);
+ if (fd == NULL)
+ return LZMA_OPTIONS_ERROR;
+
+ if (fd->props_decode == NULL)
+ return props_size == 0 ? LZMA_OK : LZMA_OPTIONS_ERROR;
+
+ return fd->props_decode(
+ &filter->options, allocator, props, props_size);
+}
diff --git a/src/liblzma/common/filter_decoder.h b/src/liblzma/common/filter_decoder.h
new file mode 100644
index 0000000..2dac602
--- /dev/null
+++ b/src/liblzma/common/filter_decoder.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_decoder.h
+/// \brief Filter ID mapping to filter-specific functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_FILTER_DECODER_H
+#define LZMA_FILTER_DECODER_H
+
+#include "common.h"
+
+
+extern lzma_ret lzma_raw_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *options);
+
+#endif
diff --git a/src/liblzma/common/filter_encoder.c b/src/liblzma/common/filter_encoder.c
new file mode 100644
index 0000000..46fe8af
--- /dev/null
+++ b/src/liblzma/common/filter_encoder.c
@@ -0,0 +1,308 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_decoder.c
+/// \brief Filter ID mapping to filter-specific functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_encoder.h"
+#include "filter_common.h"
+#include "lzma_encoder.h"
+#include "lzma2_encoder.h"
+#include "simple_encoder.h"
+#include "delta_encoder.h"
+
+
+typedef struct {
+ /// Filter ID
+ lzma_vli id;
+
+ /// Initializes the filter encoder and calls lzma_next_filter_init()
+ /// for filters + 1.
+ lzma_init_function init;
+
+ /// Calculates memory usage of the encoder. If the options are
+ /// invalid, UINT64_MAX is returned.
+ uint64_t (*memusage)(const void *options);
+
+ /// Calculates the recommended Uncompressed Size for .xz Blocks to
+ /// which the input data can be split to make multithreaded
+ /// encoding possible. If this is NULL, it is assumed that
+ /// the encoder is fast enough with single thread.
+ uint64_t (*block_size)(const void *options);
+
+ /// Tells the size of the Filter Properties field. If options are
+ /// invalid, LZMA_OPTIONS_ERROR is returned and size is set to
+ /// UINT32_MAX.
+ lzma_ret (*props_size_get)(uint32_t *size, const void *options);
+
+ /// Some filters will always have the same size Filter Properties
+ /// field. If props_size_get is NULL, this value is used.
+ uint32_t props_size_fixed;
+
+ /// Encodes Filter Properties.
+ ///
+ /// \return - LZMA_OK: Properties encoded successfully.
+ /// - LZMA_OPTIONS_ERROR: Unsupported options
+ /// - LZMA_PROG_ERROR: Invalid options or not enough
+ /// output space
+ lzma_ret (*props_encode)(const void *options, uint8_t *out);
+
+} lzma_filter_encoder;
+
+
+static const lzma_filter_encoder encoders[] = {
+#ifdef HAVE_ENCODER_LZMA1
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .init = &lzma_lzma_encoder_init,
+ .memusage = &lzma_lzma_encoder_memusage,
+ .block_size = NULL, // Not needed for LZMA1
+ .props_size_get = NULL,
+ .props_size_fixed = 5,
+ .props_encode = &lzma_lzma_props_encode,
+ },
+ {
+ .id = LZMA_FILTER_LZMA1EXT,
+ .init = &lzma_lzma_encoder_init,
+ .memusage = &lzma_lzma_encoder_memusage,
+ .block_size = NULL, // Not needed for LZMA1
+ .props_size_get = NULL,
+ .props_size_fixed = 5,
+ .props_encode = &lzma_lzma_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_LZMA2
+ {
+ .id = LZMA_FILTER_LZMA2,
+ .init = &lzma_lzma2_encoder_init,
+ .memusage = &lzma_lzma2_encoder_memusage,
+ .block_size = &lzma_lzma2_block_size,
+ .props_size_get = NULL,
+ .props_size_fixed = 1,
+ .props_encode = &lzma_lzma2_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_X86
+ {
+ .id = LZMA_FILTER_X86,
+ .init = &lzma_simple_x86_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_POWERPC
+ {
+ .id = LZMA_FILTER_POWERPC,
+ .init = &lzma_simple_powerpc_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_IA64
+ {
+ .id = LZMA_FILTER_IA64,
+ .init = &lzma_simple_ia64_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_ARM
+ {
+ .id = LZMA_FILTER_ARM,
+ .init = &lzma_simple_arm_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_ARMTHUMB
+ {
+ .id = LZMA_FILTER_ARMTHUMB,
+ .init = &lzma_simple_armthumb_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_ARM64
+ {
+ .id = LZMA_FILTER_ARM64,
+ .init = &lzma_simple_arm64_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_SPARC
+ {
+ .id = LZMA_FILTER_SPARC,
+ .init = &lzma_simple_sparc_encoder_init,
+ .memusage = NULL,
+ .block_size = NULL,
+ .props_size_get = &lzma_simple_props_size,
+ .props_encode = &lzma_simple_props_encode,
+ },
+#endif
+#ifdef HAVE_ENCODER_DELTA
+ {
+ .id = LZMA_FILTER_DELTA,
+ .init = &lzma_delta_encoder_init,
+ .memusage = &lzma_delta_coder_memusage,
+ .block_size = NULL,
+ .props_size_get = NULL,
+ .props_size_fixed = 1,
+ .props_encode = &lzma_delta_props_encode,
+ },
+#endif
+};
+
+
+static const lzma_filter_encoder *
+encoder_find(lzma_vli id)
+{
+ for (size_t i = 0; i < ARRAY_SIZE(encoders); ++i)
+ if (encoders[i].id == id)
+ return encoders + i;
+
+ return NULL;
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_filter_encoder_is_supported(lzma_vli id)
+{
+ return encoder_find(id) != NULL;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_filters_update(lzma_stream *strm, const lzma_filter *filters)
+{
+ if (strm->internal->next.update == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Validate the filter chain.
+ if (lzma_raw_encoder_memusage(filters) == UINT64_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ // The actual filter chain in the encoder is reversed. Some things
+ // still want the normal order chain, so we provide both.
+ size_t count = 1;
+ while (filters[count].id != LZMA_VLI_UNKNOWN)
+ ++count;
+
+ lzma_filter reversed_filters[LZMA_FILTERS_MAX + 1];
+ for (size_t i = 0; i < count; ++i)
+ reversed_filters[count - i - 1] = filters[i];
+
+ reversed_filters[count].id = LZMA_VLI_UNKNOWN;
+
+ return strm->internal->next.update(strm->internal->next.coder,
+ strm->allocator, filters, reversed_filters);
+}
+
+
+extern lzma_ret
+lzma_raw_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *options)
+{
+ return lzma_raw_coder_init(next, allocator,
+ options, (lzma_filter_find)(&encoder_find), true);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_raw_encoder(lzma_stream *strm, const lzma_filter *options)
+{
+ lzma_next_strm_init(lzma_raw_coder_init, strm, options,
+ (lzma_filter_find)(&encoder_find), true);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_raw_encoder_memusage(const lzma_filter *filters)
+{
+ return lzma_raw_coder_memusage(
+ (lzma_filter_find)(&encoder_find), filters);
+}
+
+
+extern uint64_t
+lzma_mt_block_size(const lzma_filter *filters)
+{
+ uint64_t max = 0;
+
+ for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ const lzma_filter_encoder *const fe
+ = encoder_find(filters[i].id);
+ if (fe->block_size != NULL) {
+ const uint64_t size
+ = fe->block_size(filters[i].options);
+ if (size == 0)
+ return 0;
+
+ if (size > max)
+ max = size;
+ }
+ }
+
+ return max;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_properties_size(uint32_t *size, const lzma_filter *filter)
+{
+ const lzma_filter_encoder *const fe = encoder_find(filter->id);
+ if (fe == NULL) {
+ // Unknown filter - if the Filter ID is a proper VLI,
+ // return LZMA_OPTIONS_ERROR instead of LZMA_PROG_ERROR,
+ // because it's possible that we just don't have support
+ // compiled in for the requested filter.
+ return filter->id <= LZMA_VLI_MAX
+ ? LZMA_OPTIONS_ERROR : LZMA_PROG_ERROR;
+ }
+
+ if (fe->props_size_get == NULL) {
+ // No props_size_get() function, use props_size_fixed.
+ *size = fe->props_size_fixed;
+ return LZMA_OK;
+ }
+
+ return fe->props_size_get(size, filter->options);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_properties_encode(const lzma_filter *filter, uint8_t *props)
+{
+ const lzma_filter_encoder *const fe = encoder_find(filter->id);
+ if (fe == NULL)
+ return LZMA_PROG_ERROR;
+
+ if (fe->props_encode == NULL)
+ return LZMA_OK;
+
+ return fe->props_encode(filter->options, props);
+}
diff --git a/src/liblzma/common/filter_encoder.h b/src/liblzma/common/filter_encoder.h
new file mode 100644
index 0000000..f1d5683
--- /dev/null
+++ b/src/liblzma/common/filter_encoder.h
@@ -0,0 +1,27 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_encoder.c
+/// \brief Filter ID mapping to filter-specific functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_FILTER_ENCODER_H
+#define LZMA_FILTER_ENCODER_H
+
+#include "common.h"
+
+
+// FIXME: Might become a part of the public API.
+extern uint64_t lzma_mt_block_size(const lzma_filter *filters);
+
+
+extern lzma_ret lzma_raw_encoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *filters);
+
+#endif
diff --git a/src/liblzma/common/filter_flags_decoder.c b/src/liblzma/common/filter_flags_decoder.c
new file mode 100644
index 0000000..ddfb085
--- /dev/null
+++ b/src/liblzma/common/filter_flags_decoder.c
@@ -0,0 +1,46 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_flags_decoder.c
+/// \brief Decodes a Filter Flags field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_decoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_filter_flags_decode(
+ lzma_filter *filter, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+{
+ // Set the pointer to NULL so the caller can always safely free it.
+ filter->options = NULL;
+
+ // Filter ID
+ return_if_error(lzma_vli_decode(&filter->id, NULL,
+ in, in_pos, in_size));
+
+ if (filter->id >= LZMA_FILTER_RESERVED_START)
+ return LZMA_DATA_ERROR;
+
+ // Size of Properties
+ lzma_vli props_size;
+ return_if_error(lzma_vli_decode(&props_size, NULL,
+ in, in_pos, in_size));
+
+ // Filter Properties
+ if (in_size - *in_pos < props_size)
+ return LZMA_DATA_ERROR;
+
+ const lzma_ret ret = lzma_properties_decode(
+ filter, allocator, in + *in_pos, props_size);
+
+ *in_pos += props_size;
+
+ return ret;
+}
diff --git a/src/liblzma/common/filter_flags_encoder.c b/src/liblzma/common/filter_flags_encoder.c
new file mode 100644
index 0000000..b57b9fd
--- /dev/null
+++ b/src/liblzma/common/filter_flags_encoder.c
@@ -0,0 +1,56 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file filter_flags_encoder.c
+/// \brief Encodes a Filter Flags field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_encoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_filter_flags_size(uint32_t *size, const lzma_filter *filter)
+{
+ if (filter->id >= LZMA_FILTER_RESERVED_START)
+ return LZMA_PROG_ERROR;
+
+ return_if_error(lzma_properties_size(size, filter));
+
+ *size += lzma_vli_size(filter->id) + lzma_vli_size(*size);
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_filter_flags_encode(const lzma_filter *filter,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Filter ID
+ if (filter->id >= LZMA_FILTER_RESERVED_START)
+ return LZMA_PROG_ERROR;
+
+ return_if_error(lzma_vli_encode(filter->id, NULL,
+ out, out_pos, out_size));
+
+ // Size of Properties
+ uint32_t props_size;
+ return_if_error(lzma_properties_size(&props_size, filter));
+ return_if_error(lzma_vli_encode(props_size, NULL,
+ out, out_pos, out_size));
+
+ // Filter Properties
+ if (out_size - *out_pos < props_size)
+ return LZMA_PROG_ERROR;
+
+ return_if_error(lzma_properties_encode(filter, out + *out_pos));
+
+ *out_pos += props_size;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/hardware_cputhreads.c b/src/liblzma/common/hardware_cputhreads.c
new file mode 100644
index 0000000..5d246d2
--- /dev/null
+++ b/src/liblzma/common/hardware_cputhreads.c
@@ -0,0 +1,34 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file hardware_cputhreads.c
+/// \brief Get the number of CPU threads or cores
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+#include "tuklib_cpucores.h"
+
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+// This is for compatibility with binaries linked against liblzma that
+// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
+LZMA_SYMVER_API("lzma_cputhreads@XZ_5.2.2",
+ uint32_t, lzma_cputhreads_522)(void) lzma_nothrow
+ __attribute__((__alias__("lzma_cputhreads_52")));
+
+LZMA_SYMVER_API("lzma_cputhreads@@XZ_5.2",
+ uint32_t, lzma_cputhreads_52)(void) lzma_nothrow;
+
+#define lzma_cputhreads lzma_cputhreads_52
+#endif
+extern LZMA_API(uint32_t)
+lzma_cputhreads(void)
+{
+ return tuklib_cpucores();
+}
diff --git a/src/liblzma/common/hardware_physmem.c b/src/liblzma/common/hardware_physmem.c
new file mode 100644
index 0000000..a2bbbe2
--- /dev/null
+++ b/src/liblzma/common/hardware_physmem.c
@@ -0,0 +1,25 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file hardware_physmem.c
+/// \brief Get the total amount of physical memory (RAM)
+//
+// Author: Jonathan Nieder
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+#include "tuklib_physmem.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_physmem(void)
+{
+ // It is simpler to make lzma_physmem() a wrapper for
+ // tuklib_physmem() than to hack appropriate symbol visibility
+ // support for the tuklib modules.
+ return tuklib_physmem();
+}
diff --git a/src/liblzma/common/index.c b/src/liblzma/common/index.c
new file mode 100644
index 0000000..8a35f43
--- /dev/null
+++ b/src/liblzma/common/index.c
@@ -0,0 +1,1269 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index.c
+/// \brief Handling of .xz Indexes and some other Stream information
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "index.h"
+#include "stream_flags_common.h"
+
+
+/// \brief How many Records to allocate at once
+///
+/// This should be big enough to avoid making lots of tiny allocations
+/// but small enough to avoid too much unused memory at once.
+#define INDEX_GROUP_SIZE 512
+
+
+/// \brief How many Records can be allocated at once at maximum
+#define PREALLOC_MAX ((SIZE_MAX - sizeof(index_group)) / sizeof(index_record))
+
+
+/// \brief Base structure for index_stream and index_group structures
+typedef struct index_tree_node_s index_tree_node;
+struct index_tree_node_s {
+ /// Uncompressed start offset of this Stream (relative to the
+ /// beginning of the file) or Block (relative to the beginning
+ /// of the Stream)
+ lzma_vli uncompressed_base;
+
+ /// Compressed start offset of this Stream or Block
+ lzma_vli compressed_base;
+
+ index_tree_node *parent;
+ index_tree_node *left;
+ index_tree_node *right;
+};
+
+
+/// \brief AVL tree to hold index_stream or index_group structures
+typedef struct {
+ /// Root node
+ index_tree_node *root;
+
+ /// Leftmost node. Since the tree will be filled sequentially,
+ /// this won't change after the first node has been added to
+ /// the tree.
+ index_tree_node *leftmost;
+
+ /// The rightmost node in the tree. Since the tree is filled
+ /// sequentially, this is always the node where to add the new data.
+ index_tree_node *rightmost;
+
+ /// Number of nodes in the tree
+ uint32_t count;
+
+} index_tree;
+
+
+typedef struct {
+ lzma_vli uncompressed_sum;
+ lzma_vli unpadded_sum;
+} index_record;
+
+
+typedef struct {
+ /// Every Record group is part of index_stream.groups tree.
+ index_tree_node node;
+
+ /// Number of Blocks in this Stream before this group.
+ lzma_vli number_base;
+
+ /// Number of Records that can be put in records[].
+ size_t allocated;
+
+ /// Index of the last Record in use.
+ size_t last;
+
+ /// The sizes in this array are stored as cumulative sums relative
+ /// to the beginning of the Stream. This makes it possible to
+ /// use binary search in lzma_index_locate().
+ ///
+ /// Note that the cumulative summing is done specially for
+ /// unpadded_sum: The previous value is rounded up to the next
+ /// multiple of four before adding the Unpadded Size of the new
+ /// Block. The total encoded size of the Blocks in the Stream
+ /// is records[last].unpadded_sum in the last Record group of
+ /// the Stream.
+ ///
+ /// For example, if the Unpadded Sizes are 39, 57, and 81, the
+ /// stored values are 39, 97 (40 + 57), and 181 (100 + 181).
+ /// The total encoded size of these Blocks is 184.
+ ///
+ /// This is a flexible array, because it makes easy to optimize
+ /// memory usage in case someone concatenates many Streams that
+ /// have only one or few Blocks.
+ index_record records[];
+
+} index_group;
+
+
+typedef struct {
+ /// Every index_stream is a node in the tree of Streams.
+ index_tree_node node;
+
+ /// Number of this Stream (first one is 1)
+ uint32_t number;
+
+ /// Total number of Blocks before this Stream
+ lzma_vli block_number_base;
+
+ /// Record groups of this Stream are stored in a tree.
+ /// It's a T-tree with AVL-tree balancing. There are
+ /// INDEX_GROUP_SIZE Records per node by default.
+ /// This keeps the number of memory allocations reasonable
+ /// and finding a Record is fast.
+ index_tree groups;
+
+ /// Number of Records in this Stream
+ lzma_vli record_count;
+
+ /// Size of the List of Records field in this Stream. This is used
+ /// together with record_count to calculate the size of the Index
+ /// field and thus the total size of the Stream.
+ lzma_vli index_list_size;
+
+ /// Stream Flags of this Stream. This is meaningful only if
+ /// the Stream Flags have been told us with lzma_index_stream_flags().
+ /// Initially stream_flags.version is set to UINT32_MAX to indicate
+ /// that the Stream Flags are unknown.
+ lzma_stream_flags stream_flags;
+
+ /// Amount of Stream Padding after this Stream. This defaults to
+ /// zero and can be set with lzma_index_stream_padding().
+ lzma_vli stream_padding;
+
+} index_stream;
+
+
+struct lzma_index_s {
+ /// AVL-tree containing the Stream(s). Often there is just one
+ /// Stream, but using a tree keeps lookups fast even when there
+ /// are many concatenated Streams.
+ index_tree streams;
+
+ /// Uncompressed size of all the Blocks in the Stream(s)
+ lzma_vli uncompressed_size;
+
+ /// Total size of all the Blocks in the Stream(s)
+ lzma_vli total_size;
+
+ /// Total number of Records in all Streams in this lzma_index
+ lzma_vli record_count;
+
+ /// Size of the List of Records field if all the Streams in this
+ /// lzma_index were packed into a single Stream (makes it simpler to
+ /// take many .xz files and combine them into a single Stream).
+ ///
+ /// This value together with record_count is needed to calculate
+ /// Backward Size that is stored into Stream Footer.
+ lzma_vli index_list_size;
+
+ /// How many Records to allocate at once in lzma_index_append().
+ /// This defaults to INDEX_GROUP_SIZE but can be overridden with
+ /// lzma_index_prealloc().
+ size_t prealloc;
+
+ /// Bitmask indicating what integrity check types have been used
+ /// as set by lzma_index_stream_flags(). The bit of the last Stream
+ /// is not included here, since it is possible to change it by
+ /// calling lzma_index_stream_flags() again.
+ uint32_t checks;
+};
+
+
+static void
+index_tree_init(index_tree *tree)
+{
+ tree->root = NULL;
+ tree->leftmost = NULL;
+ tree->rightmost = NULL;
+ tree->count = 0;
+ return;
+}
+
+
+/// Helper for index_tree_end()
+static void
+index_tree_node_end(index_tree_node *node, const lzma_allocator *allocator,
+ void (*free_func)(void *node, const lzma_allocator *allocator))
+{
+ // The tree won't ever be very huge, so recursion should be fine.
+ // 20 levels in the tree is likely quite a lot already in practice.
+ if (node->left != NULL)
+ index_tree_node_end(node->left, allocator, free_func);
+
+ if (node->right != NULL)
+ index_tree_node_end(node->right, allocator, free_func);
+
+ free_func(node, allocator);
+ return;
+}
+
+
+/// Free the memory allocated for a tree. Each node is freed using the
+/// given free_func which is either &lzma_free or &index_stream_end.
+/// The latter is used to free the Record groups from each index_stream
+/// before freeing the index_stream itself.
+static void
+index_tree_end(index_tree *tree, const lzma_allocator *allocator,
+ void (*free_func)(void *node, const lzma_allocator *allocator))
+{
+ assert(free_func != NULL);
+
+ if (tree->root != NULL)
+ index_tree_node_end(tree->root, allocator, free_func);
+
+ return;
+}
+
+
+/// Add a new node to the tree. node->uncompressed_base and
+/// node->compressed_base must have been set by the caller already.
+static void
+index_tree_append(index_tree *tree, index_tree_node *node)
+{
+ node->parent = tree->rightmost;
+ node->left = NULL;
+ node->right = NULL;
+
+ ++tree->count;
+
+ // Handle the special case of adding the first node.
+ if (tree->root == NULL) {
+ tree->root = node;
+ tree->leftmost = node;
+ tree->rightmost = node;
+ return;
+ }
+
+ // The tree is always filled sequentially.
+ assert(tree->rightmost->uncompressed_base <= node->uncompressed_base);
+ assert(tree->rightmost->compressed_base < node->compressed_base);
+
+ // Add the new node after the rightmost node. It's the correct
+ // place due to the reason above.
+ tree->rightmost->right = node;
+ tree->rightmost = node;
+
+ // Balance the AVL-tree if needed. We don't need to keep the balance
+ // factors in nodes, because we always fill the tree sequentially,
+ // and thus know the state of the tree just by looking at the node
+ // count. From the node count we can calculate how many steps to go
+ // up in the tree to find the rotation root.
+ uint32_t up = tree->count ^ (UINT32_C(1) << bsr32(tree->count));
+ if (up != 0) {
+ // Locate the root node for the rotation.
+ up = ctz32(tree->count) + 2;
+ do {
+ node = node->parent;
+ } while (--up > 0);
+
+ // Rotate left using node as the rotation root.
+ index_tree_node *pivot = node->right;
+
+ if (node->parent == NULL) {
+ tree->root = pivot;
+ } else {
+ assert(node->parent->right == node);
+ node->parent->right = pivot;
+ }
+
+ pivot->parent = node->parent;
+
+ node->right = pivot->left;
+ if (node->right != NULL)
+ node->right->parent = node;
+
+ pivot->left = node;
+ node->parent = pivot;
+ }
+
+ return;
+}
+
+
+/// Get the next node in the tree. Return NULL if there are no more nodes.
+static void *
+index_tree_next(const index_tree_node *node)
+{
+ if (node->right != NULL) {
+ node = node->right;
+ while (node->left != NULL)
+ node = node->left;
+
+ return (void *)(node);
+ }
+
+ while (node->parent != NULL && node->parent->right == node)
+ node = node->parent;
+
+ return (void *)(node->parent);
+}
+
+
+/// Locate a node that contains the given uncompressed offset. It is
+/// caller's job to check that target is not bigger than the uncompressed
+/// size of the tree (the last node would be returned in that case still).
+static void *
+index_tree_locate(const index_tree *tree, lzma_vli target)
+{
+ const index_tree_node *result = NULL;
+ const index_tree_node *node = tree->root;
+
+ assert(tree->leftmost == NULL
+ || tree->leftmost->uncompressed_base == 0);
+
+ // Consecutive nodes may have the same uncompressed_base.
+ // We must pick the rightmost one.
+ while (node != NULL) {
+ if (node->uncompressed_base > target) {
+ node = node->left;
+ } else {
+ result = node;
+ node = node->right;
+ }
+ }
+
+ return (void *)(result);
+}
+
+
+/// Allocate and initialize a new Stream using the given base offsets.
+static index_stream *
+index_stream_init(lzma_vli compressed_base, lzma_vli uncompressed_base,
+ uint32_t stream_number, lzma_vli block_number_base,
+ const lzma_allocator *allocator)
+{
+ index_stream *s = lzma_alloc(sizeof(index_stream), allocator);
+ if (s == NULL)
+ return NULL;
+
+ s->node.uncompressed_base = uncompressed_base;
+ s->node.compressed_base = compressed_base;
+ s->node.parent = NULL;
+ s->node.left = NULL;
+ s->node.right = NULL;
+
+ s->number = stream_number;
+ s->block_number_base = block_number_base;
+
+ index_tree_init(&s->groups);
+
+ s->record_count = 0;
+ s->index_list_size = 0;
+ s->stream_flags.version = UINT32_MAX;
+ s->stream_padding = 0;
+
+ return s;
+}
+
+
+/// Free the memory allocated for a Stream and its Record groups.
+static void
+index_stream_end(void *node, const lzma_allocator *allocator)
+{
+ index_stream *s = node;
+ index_tree_end(&s->groups, allocator, &lzma_free);
+ lzma_free(s, allocator);
+ return;
+}
+
+
+static lzma_index *
+index_init_plain(const lzma_allocator *allocator)
+{
+ lzma_index *i = lzma_alloc(sizeof(lzma_index), allocator);
+ if (i != NULL) {
+ index_tree_init(&i->streams);
+ i->uncompressed_size = 0;
+ i->total_size = 0;
+ i->record_count = 0;
+ i->index_list_size = 0;
+ i->prealloc = INDEX_GROUP_SIZE;
+ i->checks = 0;
+ }
+
+ return i;
+}
+
+
+extern LZMA_API(lzma_index *)
+lzma_index_init(const lzma_allocator *allocator)
+{
+ lzma_index *i = index_init_plain(allocator);
+ if (i == NULL)
+ return NULL;
+
+ index_stream *s = index_stream_init(0, 0, 1, 0, allocator);
+ if (s == NULL) {
+ lzma_free(i, allocator);
+ return NULL;
+ }
+
+ index_tree_append(&i->streams, &s->node);
+
+ return i;
+}
+
+
+extern LZMA_API(void)
+lzma_index_end(lzma_index *i, const lzma_allocator *allocator)
+{
+ // NOTE: If you modify this function, check also the bottom
+ // of lzma_index_cat().
+ if (i != NULL) {
+ index_tree_end(&i->streams, allocator, &index_stream_end);
+ lzma_free(i, allocator);
+ }
+
+ return;
+}
+
+
+extern void
+lzma_index_prealloc(lzma_index *i, lzma_vli records)
+{
+ if (records > PREALLOC_MAX)
+ records = PREALLOC_MAX;
+
+ i->prealloc = (size_t)(records);
+ return;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_index_memusage(lzma_vli streams, lzma_vli blocks)
+{
+ // This calculates an upper bound that is only a little bit
+ // bigger than the exact maximum memory usage with the given
+ // parameters.
+
+ // Typical malloc() overhead is 2 * sizeof(void *) but we take
+ // a little bit extra just in case. Using LZMA_MEMUSAGE_BASE
+ // instead would give too inaccurate estimate.
+ const size_t alloc_overhead = 4 * sizeof(void *);
+
+ // Amount of memory needed for each Stream base structures.
+ // We assume that every Stream has at least one Block and
+ // thus at least one group.
+ const size_t stream_base = sizeof(index_stream)
+ + sizeof(index_group) + 2 * alloc_overhead;
+
+ // Amount of memory needed per group.
+ const size_t group_base = sizeof(index_group)
+ + INDEX_GROUP_SIZE * sizeof(index_record)
+ + alloc_overhead;
+
+ // Number of groups. There may actually be more, but that overhead
+ // has been taken into account in stream_base already.
+ const lzma_vli groups
+ = (blocks + INDEX_GROUP_SIZE - 1) / INDEX_GROUP_SIZE;
+
+ // Memory used by index_stream and index_group structures.
+ const uint64_t streams_mem = streams * stream_base;
+ const uint64_t groups_mem = groups * group_base;
+
+ // Memory used by the base structure.
+ const uint64_t index_base = sizeof(lzma_index) + alloc_overhead;
+
+ // Validate the arguments and catch integer overflows.
+ // Maximum number of Streams is "only" UINT32_MAX, because
+ // that limit is used by the tree containing the Streams.
+ const uint64_t limit = UINT64_MAX - index_base;
+ if (streams == 0 || streams > UINT32_MAX || blocks > LZMA_VLI_MAX
+ || streams > limit / stream_base
+ || groups > limit / group_base
+ || limit - streams_mem < groups_mem)
+ return UINT64_MAX;
+
+ return index_base + streams_mem + groups_mem;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_index_memused(const lzma_index *i)
+{
+ return lzma_index_memusage(i->streams.count, i->record_count);
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_block_count(const lzma_index *i)
+{
+ return i->record_count;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_stream_count(const lzma_index *i)
+{
+ return i->streams.count;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_size(const lzma_index *i)
+{
+ return index_size(i->record_count, i->index_list_size);
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_total_size(const lzma_index *i)
+{
+ return i->total_size;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_stream_size(const lzma_index *i)
+{
+ // Stream Header + Blocks + Index + Stream Footer
+ return LZMA_STREAM_HEADER_SIZE + i->total_size
+ + index_size(i->record_count, i->index_list_size)
+ + LZMA_STREAM_HEADER_SIZE;
+}
+
+
+static lzma_vli
+index_file_size(lzma_vli compressed_base, lzma_vli unpadded_sum,
+ lzma_vli record_count, lzma_vli index_list_size,
+ lzma_vli stream_padding)
+{
+ // Earlier Streams and Stream Paddings + Stream Header
+ // + Blocks + Index + Stream Footer + Stream Padding
+ //
+ // This might go over LZMA_VLI_MAX due to too big unpadded_sum
+ // when this function is used in lzma_index_append().
+ lzma_vli file_size = compressed_base + 2 * LZMA_STREAM_HEADER_SIZE
+ + stream_padding + vli_ceil4(unpadded_sum);
+ if (file_size > LZMA_VLI_MAX)
+ return LZMA_VLI_UNKNOWN;
+
+ // The same applies here.
+ file_size += index_size(record_count, index_list_size);
+ if (file_size > LZMA_VLI_MAX)
+ return LZMA_VLI_UNKNOWN;
+
+ return file_size;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_file_size(const lzma_index *i)
+{
+ const index_stream *s = (const index_stream *)(i->streams.rightmost);
+ const index_group *g = (const index_group *)(s->groups.rightmost);
+ return index_file_size(s->node.compressed_base,
+ g == NULL ? 0 : g->records[g->last].unpadded_sum,
+ s->record_count, s->index_list_size,
+ s->stream_padding);
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_uncompressed_size(const lzma_index *i)
+{
+ return i->uncompressed_size;
+}
+
+
+extern LZMA_API(uint32_t)
+lzma_index_checks(const lzma_index *i)
+{
+ uint32_t checks = i->checks;
+
+ // Get the type of the Check of the last Stream too.
+ const index_stream *s = (const index_stream *)(i->streams.rightmost);
+ if (s->stream_flags.version != UINT32_MAX)
+ checks |= UINT32_C(1) << s->stream_flags.check;
+
+ return checks;
+}
+
+
+extern uint32_t
+lzma_index_padding_size(const lzma_index *i)
+{
+ return (LZMA_VLI_C(4) - index_size_unpadded(
+ i->record_count, i->index_list_size)) & 3;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_stream_flags(lzma_index *i, const lzma_stream_flags *stream_flags)
+{
+ if (i == NULL || stream_flags == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Validate the Stream Flags.
+ return_if_error(lzma_stream_flags_compare(
+ stream_flags, stream_flags));
+
+ index_stream *s = (index_stream *)(i->streams.rightmost);
+ s->stream_flags = *stream_flags;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_stream_padding(lzma_index *i, lzma_vli stream_padding)
+{
+ if (i == NULL || stream_padding > LZMA_VLI_MAX
+ || (stream_padding & 3) != 0)
+ return LZMA_PROG_ERROR;
+
+ index_stream *s = (index_stream *)(i->streams.rightmost);
+
+ // Check that the new value won't make the file grow too big.
+ const lzma_vli old_stream_padding = s->stream_padding;
+ s->stream_padding = 0;
+ if (lzma_index_file_size(i) + stream_padding > LZMA_VLI_MAX) {
+ s->stream_padding = old_stream_padding;
+ return LZMA_DATA_ERROR;
+ }
+
+ s->stream_padding = stream_padding;
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_append(lzma_index *i, const lzma_allocator *allocator,
+ lzma_vli unpadded_size, lzma_vli uncompressed_size)
+{
+ // Validate.
+ if (i == NULL || unpadded_size < UNPADDED_SIZE_MIN
+ || unpadded_size > UNPADDED_SIZE_MAX
+ || uncompressed_size > LZMA_VLI_MAX)
+ return LZMA_PROG_ERROR;
+
+ index_stream *s = (index_stream *)(i->streams.rightmost);
+ index_group *g = (index_group *)(s->groups.rightmost);
+
+ const lzma_vli compressed_base = g == NULL ? 0
+ : vli_ceil4(g->records[g->last].unpadded_sum);
+ const lzma_vli uncompressed_base = g == NULL ? 0
+ : g->records[g->last].uncompressed_sum;
+ const uint32_t index_list_size_add = lzma_vli_size(unpadded_size)
+ + lzma_vli_size(uncompressed_size);
+
+ // Check that uncompressed size will not overflow.
+ if (uncompressed_base + uncompressed_size > LZMA_VLI_MAX)
+ return LZMA_DATA_ERROR;
+
+ // Check that the new unpadded sum will not overflow. This is
+ // checked again in index_file_size(), but the unpadded sum is
+ // passed to vli_ceil4() which expects a valid lzma_vli value.
+ if (compressed_base + unpadded_size > UNPADDED_SIZE_MAX)
+ return LZMA_DATA_ERROR;
+
+ // Check that the file size will stay within limits.
+ if (index_file_size(s->node.compressed_base,
+ compressed_base + unpadded_size, s->record_count + 1,
+ s->index_list_size + index_list_size_add,
+ s->stream_padding) == LZMA_VLI_UNKNOWN)
+ return LZMA_DATA_ERROR;
+
+ // The size of the Index field must not exceed the maximum value
+ // that can be stored in the Backward Size field.
+ if (index_size(i->record_count + 1,
+ i->index_list_size + index_list_size_add)
+ > LZMA_BACKWARD_SIZE_MAX)
+ return LZMA_DATA_ERROR;
+
+ if (g != NULL && g->last + 1 < g->allocated) {
+ // There is space in the last group at least for one Record.
+ ++g->last;
+ } else {
+ // We need to allocate a new group.
+ g = lzma_alloc(sizeof(index_group)
+ + i->prealloc * sizeof(index_record),
+ allocator);
+ if (g == NULL)
+ return LZMA_MEM_ERROR;
+
+ g->last = 0;
+ g->allocated = i->prealloc;
+
+ // Reset prealloc so that if the application happens to
+ // add new Records, the allocation size will be sane.
+ i->prealloc = INDEX_GROUP_SIZE;
+
+ // Set the start offsets of this group.
+ g->node.uncompressed_base = uncompressed_base;
+ g->node.compressed_base = compressed_base;
+ g->number_base = s->record_count + 1;
+
+ // Add the new group to the Stream.
+ index_tree_append(&s->groups, &g->node);
+ }
+
+ // Add the new Record to the group.
+ g->records[g->last].uncompressed_sum
+ = uncompressed_base + uncompressed_size;
+ g->records[g->last].unpadded_sum
+ = compressed_base + unpadded_size;
+
+ // Update the totals.
+ ++s->record_count;
+ s->index_list_size += index_list_size_add;
+
+ i->total_size += vli_ceil4(unpadded_size);
+ i->uncompressed_size += uncompressed_size;
+ ++i->record_count;
+ i->index_list_size += index_list_size_add;
+
+ return LZMA_OK;
+}
+
+
+/// Structure to pass info to index_cat_helper()
+typedef struct {
+ /// Uncompressed size of the destination
+ lzma_vli uncompressed_size;
+
+ /// Compressed file size of the destination
+ lzma_vli file_size;
+
+ /// Same as above but for Block numbers
+ lzma_vli block_number_add;
+
+ /// Number of Streams that were in the destination index before we
+ /// started appending new Streams from the source index. This is
+ /// used to fix the Stream numbering.
+ uint32_t stream_number_add;
+
+ /// Destination index' Stream tree
+ index_tree *streams;
+
+} index_cat_info;
+
+
+/// Add the Stream nodes from the source index to dest using recursion.
+/// Simplest iterative traversal of the source tree wouldn't work, because
+/// we update the pointers in nodes when moving them to the destination tree.
+static void
+index_cat_helper(const index_cat_info *info, index_stream *this)
+{
+ index_stream *left = (index_stream *)(this->node.left);
+ index_stream *right = (index_stream *)(this->node.right);
+
+ if (left != NULL)
+ index_cat_helper(info, left);
+
+ this->node.uncompressed_base += info->uncompressed_size;
+ this->node.compressed_base += info->file_size;
+ this->number += info->stream_number_add;
+ this->block_number_base += info->block_number_add;
+ index_tree_append(info->streams, &this->node);
+
+ if (right != NULL)
+ index_cat_helper(info, right);
+
+ return;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_cat(lzma_index *restrict dest, lzma_index *restrict src,
+ const lzma_allocator *allocator)
+{
+ if (dest == NULL || src == NULL)
+ return LZMA_PROG_ERROR;
+
+ const lzma_vli dest_file_size = lzma_index_file_size(dest);
+
+ // Check that we don't exceed the file size limits.
+ if (dest_file_size + lzma_index_file_size(src) > LZMA_VLI_MAX
+ || dest->uncompressed_size + src->uncompressed_size
+ > LZMA_VLI_MAX)
+ return LZMA_DATA_ERROR;
+
+ // Check that the encoded size of the combined lzma_indexes stays
+ // within limits. In theory, this should be done only if we know
+ // that the user plans to actually combine the Streams and thus
+ // construct a single Index (probably rare). However, exceeding
+ // this limit is quite theoretical, so we do this check always
+ // to simplify things elsewhere.
+ {
+ const lzma_vli dest_size = index_size_unpadded(
+ dest->record_count, dest->index_list_size);
+ const lzma_vli src_size = index_size_unpadded(
+ src->record_count, src->index_list_size);
+ if (vli_ceil4(dest_size + src_size) > LZMA_BACKWARD_SIZE_MAX)
+ return LZMA_DATA_ERROR;
+ }
+
+ // Optimize the last group to minimize memory usage. Allocation has
+ // to be done before modifying dest or src.
+ {
+ index_stream *s = (index_stream *)(dest->streams.rightmost);
+ index_group *g = (index_group *)(s->groups.rightmost);
+ if (g != NULL && g->last + 1 < g->allocated) {
+ assert(g->node.left == NULL);
+ assert(g->node.right == NULL);
+
+ index_group *newg = lzma_alloc(sizeof(index_group)
+ + (g->last + 1)
+ * sizeof(index_record),
+ allocator);
+ if (newg == NULL)
+ return LZMA_MEM_ERROR;
+
+ newg->node = g->node;
+ newg->allocated = g->last + 1;
+ newg->last = g->last;
+ newg->number_base = g->number_base;
+
+ memcpy(newg->records, g->records, newg->allocated
+ * sizeof(index_record));
+
+ if (g->node.parent != NULL) {
+ assert(g->node.parent->right == &g->node);
+ g->node.parent->right = &newg->node;
+ }
+
+ if (s->groups.leftmost == &g->node) {
+ assert(s->groups.root == &g->node);
+ s->groups.leftmost = &newg->node;
+ s->groups.root = &newg->node;
+ }
+
+ assert(s->groups.rightmost == &g->node);
+ s->groups.rightmost = &newg->node;
+
+ lzma_free(g, allocator);
+
+ // NOTE: newg isn't leaked here because
+ // newg == (void *)&newg->node.
+ }
+ }
+
+ // dest->checks includes the check types of all except the last Stream
+ // in dest. Set the bit for the check type of the last Stream now so
+ // that it won't get lost when Stream(s) from src are appended to dest.
+ dest->checks = lzma_index_checks(dest);
+
+ // Add all the Streams from src to dest. Update the base offsets
+ // of each Stream from src.
+ const index_cat_info info = {
+ .uncompressed_size = dest->uncompressed_size,
+ .file_size = dest_file_size,
+ .stream_number_add = dest->streams.count,
+ .block_number_add = dest->record_count,
+ .streams = &dest->streams,
+ };
+ index_cat_helper(&info, (index_stream *)(src->streams.root));
+
+ // Update info about all the combined Streams.
+ dest->uncompressed_size += src->uncompressed_size;
+ dest->total_size += src->total_size;
+ dest->record_count += src->record_count;
+ dest->index_list_size += src->index_list_size;
+ dest->checks |= src->checks;
+
+ // There's nothing else left in src than the base structure.
+ lzma_free(src, allocator);
+
+ return LZMA_OK;
+}
+
+
+/// Duplicate an index_stream.
+static index_stream *
+index_dup_stream(const index_stream *src, const lzma_allocator *allocator)
+{
+ // Catch a somewhat theoretical integer overflow.
+ if (src->record_count > PREALLOC_MAX)
+ return NULL;
+
+ // Allocate and initialize a new Stream.
+ index_stream *dest = index_stream_init(src->node.compressed_base,
+ src->node.uncompressed_base, src->number,
+ src->block_number_base, allocator);
+ if (dest == NULL)
+ return NULL;
+
+ // Copy the overall information.
+ dest->record_count = src->record_count;
+ dest->index_list_size = src->index_list_size;
+ dest->stream_flags = src->stream_flags;
+ dest->stream_padding = src->stream_padding;
+
+ // Return if there are no groups to duplicate.
+ if (src->groups.leftmost == NULL)
+ return dest;
+
+ // Allocate memory for the Records. We put all the Records into
+ // a single group. It's simplest and also tends to make
+ // lzma_index_locate() a little bit faster with very big Indexes.
+ index_group *destg = lzma_alloc(sizeof(index_group)
+ + src->record_count * sizeof(index_record),
+ allocator);
+ if (destg == NULL) {
+ index_stream_end(dest, allocator);
+ return NULL;
+ }
+
+ // Initialize destg.
+ destg->node.uncompressed_base = 0;
+ destg->node.compressed_base = 0;
+ destg->number_base = 1;
+ destg->allocated = src->record_count;
+ destg->last = src->record_count - 1;
+
+ // Go through all the groups in src and copy the Records into destg.
+ const index_group *srcg = (const index_group *)(src->groups.leftmost);
+ size_t i = 0;
+ do {
+ memcpy(destg->records + i, srcg->records,
+ (srcg->last + 1) * sizeof(index_record));
+ i += srcg->last + 1;
+ srcg = index_tree_next(&srcg->node);
+ } while (srcg != NULL);
+
+ assert(i == destg->allocated);
+
+ // Add the group to the new Stream.
+ index_tree_append(&dest->groups, &destg->node);
+
+ return dest;
+}
+
+
+extern LZMA_API(lzma_index *)
+lzma_index_dup(const lzma_index *src, const lzma_allocator *allocator)
+{
+ // Allocate the base structure (no initial Stream).
+ lzma_index *dest = index_init_plain(allocator);
+ if (dest == NULL)
+ return NULL;
+
+ // Copy the totals.
+ dest->uncompressed_size = src->uncompressed_size;
+ dest->total_size = src->total_size;
+ dest->record_count = src->record_count;
+ dest->index_list_size = src->index_list_size;
+
+ // Copy the Streams and the groups in them.
+ const index_stream *srcstream
+ = (const index_stream *)(src->streams.leftmost);
+ do {
+ index_stream *deststream = index_dup_stream(
+ srcstream, allocator);
+ if (deststream == NULL) {
+ lzma_index_end(dest, allocator);
+ return NULL;
+ }
+
+ index_tree_append(&dest->streams, &deststream->node);
+
+ srcstream = index_tree_next(&srcstream->node);
+ } while (srcstream != NULL);
+
+ return dest;
+}
+
+
+/// Indexing for lzma_index_iter.internal[]
+enum {
+ ITER_INDEX,
+ ITER_STREAM,
+ ITER_GROUP,
+ ITER_RECORD,
+ ITER_METHOD,
+};
+
+
+/// Values for lzma_index_iter.internal[ITER_METHOD].s
+enum {
+ ITER_METHOD_NORMAL,
+ ITER_METHOD_NEXT,
+ ITER_METHOD_LEFTMOST,
+};
+
+
+static void
+iter_set_info(lzma_index_iter *iter)
+{
+ const lzma_index *i = iter->internal[ITER_INDEX].p;
+ const index_stream *stream = iter->internal[ITER_STREAM].p;
+ const index_group *group = iter->internal[ITER_GROUP].p;
+ const size_t record = iter->internal[ITER_RECORD].s;
+
+ // lzma_index_iter.internal must not contain a pointer to the last
+ // group in the index, because that may be reallocated by
+ // lzma_index_cat().
+ if (group == NULL) {
+ // There are no groups.
+ assert(stream->groups.root == NULL);
+ iter->internal[ITER_METHOD].s = ITER_METHOD_LEFTMOST;
+
+ } else if (i->streams.rightmost != &stream->node
+ || stream->groups.rightmost != &group->node) {
+ // The group is not not the last group in the index.
+ iter->internal[ITER_METHOD].s = ITER_METHOD_NORMAL;
+
+ } else if (stream->groups.leftmost != &group->node) {
+ // The group isn't the only group in the Stream, thus we
+ // know that it must have a parent group i.e. it's not
+ // the root node.
+ assert(stream->groups.root != &group->node);
+ assert(group->node.parent->right == &group->node);
+ iter->internal[ITER_METHOD].s = ITER_METHOD_NEXT;
+ iter->internal[ITER_GROUP].p = group->node.parent;
+
+ } else {
+ // The Stream has only one group.
+ assert(stream->groups.root == &group->node);
+ assert(group->node.parent == NULL);
+ iter->internal[ITER_METHOD].s = ITER_METHOD_LEFTMOST;
+ iter->internal[ITER_GROUP].p = NULL;
+ }
+
+ // NOTE: lzma_index_iter.stream.number is lzma_vli but we use uint32_t
+ // internally.
+ iter->stream.number = stream->number;
+ iter->stream.block_count = stream->record_count;
+ iter->stream.compressed_offset = stream->node.compressed_base;
+ iter->stream.uncompressed_offset = stream->node.uncompressed_base;
+
+ // iter->stream.flags will be NULL if the Stream Flags haven't been
+ // set with lzma_index_stream_flags().
+ iter->stream.flags = stream->stream_flags.version == UINT32_MAX
+ ? NULL : &stream->stream_flags;
+ iter->stream.padding = stream->stream_padding;
+
+ if (stream->groups.rightmost == NULL) {
+ // Stream has no Blocks.
+ iter->stream.compressed_size = index_size(0, 0)
+ + 2 * LZMA_STREAM_HEADER_SIZE;
+ iter->stream.uncompressed_size = 0;
+ } else {
+ const index_group *g = (const index_group *)(
+ stream->groups.rightmost);
+
+ // Stream Header + Stream Footer + Index + Blocks
+ iter->stream.compressed_size = 2 * LZMA_STREAM_HEADER_SIZE
+ + index_size(stream->record_count,
+ stream->index_list_size)
+ + vli_ceil4(g->records[g->last].unpadded_sum);
+ iter->stream.uncompressed_size
+ = g->records[g->last].uncompressed_sum;
+ }
+
+ if (group != NULL) {
+ iter->block.number_in_stream = group->number_base + record;
+ iter->block.number_in_file = iter->block.number_in_stream
+ + stream->block_number_base;
+
+ iter->block.compressed_stream_offset
+ = record == 0 ? group->node.compressed_base
+ : vli_ceil4(group->records[
+ record - 1].unpadded_sum);
+ iter->block.uncompressed_stream_offset
+ = record == 0 ? group->node.uncompressed_base
+ : group->records[record - 1].uncompressed_sum;
+
+ iter->block.uncompressed_size
+ = group->records[record].uncompressed_sum
+ - iter->block.uncompressed_stream_offset;
+ iter->block.unpadded_size
+ = group->records[record].unpadded_sum
+ - iter->block.compressed_stream_offset;
+ iter->block.total_size = vli_ceil4(iter->block.unpadded_size);
+
+ iter->block.compressed_stream_offset
+ += LZMA_STREAM_HEADER_SIZE;
+
+ iter->block.compressed_file_offset
+ = iter->block.compressed_stream_offset
+ + iter->stream.compressed_offset;
+ iter->block.uncompressed_file_offset
+ = iter->block.uncompressed_stream_offset
+ + iter->stream.uncompressed_offset;
+ }
+
+ return;
+}
+
+
+extern LZMA_API(void)
+lzma_index_iter_init(lzma_index_iter *iter, const lzma_index *i)
+{
+ iter->internal[ITER_INDEX].p = i;
+ lzma_index_iter_rewind(iter);
+ return;
+}
+
+
+extern LZMA_API(void)
+lzma_index_iter_rewind(lzma_index_iter *iter)
+{
+ iter->internal[ITER_STREAM].p = NULL;
+ iter->internal[ITER_GROUP].p = NULL;
+ iter->internal[ITER_RECORD].s = 0;
+ iter->internal[ITER_METHOD].s = ITER_METHOD_NORMAL;
+ return;
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_index_iter_next(lzma_index_iter *iter, lzma_index_iter_mode mode)
+{
+ // Catch unsupported mode values.
+ if ((unsigned int)(mode) > LZMA_INDEX_ITER_NONEMPTY_BLOCK)
+ return true;
+
+ const lzma_index *i = iter->internal[ITER_INDEX].p;
+ const index_stream *stream = iter->internal[ITER_STREAM].p;
+ const index_group *group = NULL;
+ size_t record = iter->internal[ITER_RECORD].s;
+
+ // If we are being asked for the next Stream, leave group to NULL
+ // so that the rest of the this function thinks that this Stream
+ // has no groups and will thus go to the next Stream.
+ if (mode != LZMA_INDEX_ITER_STREAM) {
+ // Get the pointer to the current group. See iter_set_inf()
+ // for explanation.
+ switch (iter->internal[ITER_METHOD].s) {
+ case ITER_METHOD_NORMAL:
+ group = iter->internal[ITER_GROUP].p;
+ break;
+
+ case ITER_METHOD_NEXT:
+ group = index_tree_next(iter->internal[ITER_GROUP].p);
+ break;
+
+ case ITER_METHOD_LEFTMOST:
+ group = (const index_group *)(
+ stream->groups.leftmost);
+ break;
+ }
+ }
+
+again:
+ if (stream == NULL) {
+ // We at the beginning of the lzma_index.
+ // Locate the first Stream.
+ stream = (const index_stream *)(i->streams.leftmost);
+ if (mode >= LZMA_INDEX_ITER_BLOCK) {
+ // Since we are being asked to return information
+ // about the first a Block, skip Streams that have
+ // no Blocks.
+ while (stream->groups.leftmost == NULL) {
+ stream = index_tree_next(&stream->node);
+ if (stream == NULL)
+ return true;
+ }
+ }
+
+ // Start from the first Record in the Stream.
+ group = (const index_group *)(stream->groups.leftmost);
+ record = 0;
+
+ } else if (group != NULL && record < group->last) {
+ // The next Record is in the same group.
+ ++record;
+
+ } else {
+ // This group has no more Records or this Stream has
+ // no Blocks at all.
+ record = 0;
+
+ // If group is not NULL, this Stream has at least one Block
+ // and thus at least one group. Find the next group.
+ if (group != NULL)
+ group = index_tree_next(&group->node);
+
+ if (group == NULL) {
+ // This Stream has no more Records. Find the next
+ // Stream. If we are being asked to return information
+ // about a Block, we skip empty Streams.
+ do {
+ stream = index_tree_next(&stream->node);
+ if (stream == NULL)
+ return true;
+ } while (mode >= LZMA_INDEX_ITER_BLOCK
+ && stream->groups.leftmost == NULL);
+
+ group = (const index_group *)(
+ stream->groups.leftmost);
+ }
+ }
+
+ if (mode == LZMA_INDEX_ITER_NONEMPTY_BLOCK) {
+ // We need to look for the next Block again if this Block
+ // is empty.
+ if (record == 0) {
+ if (group->node.uncompressed_base
+ == group->records[0].uncompressed_sum)
+ goto again;
+ } else if (group->records[record - 1].uncompressed_sum
+ == group->records[record].uncompressed_sum) {
+ goto again;
+ }
+ }
+
+ iter->internal[ITER_STREAM].p = stream;
+ iter->internal[ITER_GROUP].p = group;
+ iter->internal[ITER_RECORD].s = record;
+
+ iter_set_info(iter);
+
+ return false;
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_index_iter_locate(lzma_index_iter *iter, lzma_vli target)
+{
+ const lzma_index *i = iter->internal[ITER_INDEX].p;
+
+ // If the target is past the end of the file, return immediately.
+ if (i->uncompressed_size <= target)
+ return true;
+
+ // Locate the Stream containing the target offset.
+ const index_stream *stream = index_tree_locate(&i->streams, target);
+ assert(stream != NULL);
+ target -= stream->node.uncompressed_base;
+
+ // Locate the group containing the target offset.
+ const index_group *group = index_tree_locate(&stream->groups, target);
+ assert(group != NULL);
+
+ // Use binary search to locate the exact Record. It is the first
+ // Record whose uncompressed_sum is greater than target.
+ // This is because we want the rightmost Record that fulfills the
+ // search criterion. It is possible that there are empty Blocks;
+ // we don't want to return them.
+ size_t left = 0;
+ size_t right = group->last;
+
+ while (left < right) {
+ const size_t pos = left + (right - left) / 2;
+ if (group->records[pos].uncompressed_sum <= target)
+ left = pos + 1;
+ else
+ right = pos;
+ }
+
+ iter->internal[ITER_STREAM].p = stream;
+ iter->internal[ITER_GROUP].p = group;
+ iter->internal[ITER_RECORD].s = left;
+
+ iter_set_info(iter);
+
+ return false;
+}
diff --git a/src/liblzma/common/index.h b/src/liblzma/common/index.h
new file mode 100644
index 0000000..7b27d70
--- /dev/null
+++ b/src/liblzma/common/index.h
@@ -0,0 +1,81 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index.h
+/// \brief Handling of Index
+/// \note This header file does not include common.h or lzma.h because
+/// this file is needed by both liblzma internally and by the
+/// tests. Including common.h will include and define many things
+/// the tests do not need and prevents issues with header file
+/// include order. This way, if lzma.h or common.h are not
+/// included before this file it will break on every OS instead
+/// of causing more subtle errors.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_INDEX_H
+#define LZMA_INDEX_H
+
+
+/// Minimum Unpadded Size
+#define UNPADDED_SIZE_MIN LZMA_VLI_C(5)
+
+/// Maximum Unpadded Size
+#define UNPADDED_SIZE_MAX (LZMA_VLI_MAX & ~LZMA_VLI_C(3))
+
+/// Index Indicator based on xz specification
+#define INDEX_INDICATOR 0
+
+
+/// Get the size of the Index Padding field. This is needed by Index encoder
+/// and decoder, but applications should have no use for this.
+extern uint32_t lzma_index_padding_size(const lzma_index *i);
+
+
+/// Set for how many Records to allocate memory the next time
+/// lzma_index_append() needs to allocate space for a new Record.
+/// This is used only by the Index decoder.
+extern void lzma_index_prealloc(lzma_index *i, lzma_vli records);
+
+
+/// Round the variable-length integer to the next multiple of four.
+static inline lzma_vli
+vli_ceil4(lzma_vli vli)
+{
+ assert(vli <= UNPADDED_SIZE_MAX);
+ return (vli + 3) & ~LZMA_VLI_C(3);
+}
+
+
+/// Calculate the size of the Index field excluding Index Padding
+static inline lzma_vli
+index_size_unpadded(lzma_vli count, lzma_vli index_list_size)
+{
+ // Index Indicator + Number of Records + List of Records + CRC32
+ return 1 + lzma_vli_size(count) + index_list_size + 4;
+}
+
+
+/// Calculate the size of the Index field including Index Padding
+static inline lzma_vli
+index_size(lzma_vli count, lzma_vli index_list_size)
+{
+ return vli_ceil4(index_size_unpadded(count, index_list_size));
+}
+
+
+/// Calculate the total size of the Stream
+static inline lzma_vli
+index_stream_size(lzma_vli blocks_size,
+ lzma_vli count, lzma_vli index_list_size)
+{
+ return LZMA_STREAM_HEADER_SIZE + blocks_size
+ + index_size(count, index_list_size)
+ + LZMA_STREAM_HEADER_SIZE;
+}
+
+#endif
diff --git a/src/liblzma/common/index_decoder.c b/src/liblzma/common/index_decoder.c
new file mode 100644
index 0000000..19a31b3
--- /dev/null
+++ b/src/liblzma/common/index_decoder.c
@@ -0,0 +1,362 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index_decoder.c
+/// \brief Decodes the Index field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "index_decoder.h"
+#include "check.h"
+
+
+typedef struct {
+ enum {
+ SEQ_INDICATOR,
+ SEQ_COUNT,
+ SEQ_MEMUSAGE,
+ SEQ_UNPADDED,
+ SEQ_UNCOMPRESSED,
+ SEQ_PADDING_INIT,
+ SEQ_PADDING,
+ SEQ_CRC32,
+ } sequence;
+
+ /// Memory usage limit
+ uint64_t memlimit;
+
+ /// Target Index
+ lzma_index *index;
+
+ /// Pointer give by the application, which is set after
+ /// successful decoding.
+ lzma_index **index_ptr;
+
+ /// Number of Records left to decode.
+ lzma_vli count;
+
+ /// The most recent Unpadded Size field
+ lzma_vli unpadded_size;
+
+ /// The most recent Uncompressed Size field
+ lzma_vli uncompressed_size;
+
+ /// Position in integers
+ size_t pos;
+
+ /// CRC32 of the List of Records field
+ uint32_t crc32;
+} lzma_index_coder;
+
+
+static lzma_ret
+index_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size,
+ uint8_t *restrict out lzma_attribute((__unused__)),
+ size_t *restrict out_pos lzma_attribute((__unused__)),
+ size_t out_size lzma_attribute((__unused__)),
+ lzma_action action lzma_attribute((__unused__)))
+{
+ lzma_index_coder *coder = coder_ptr;
+
+ // Similar optimization as in index_encoder.c
+ const size_t in_start = *in_pos;
+ lzma_ret ret = LZMA_OK;
+
+ while (*in_pos < in_size)
+ switch (coder->sequence) {
+ case SEQ_INDICATOR:
+ // Return LZMA_DATA_ERROR instead of e.g. LZMA_PROG_ERROR or
+ // LZMA_FORMAT_ERROR, because a typical usage case for Index
+ // decoder is when parsing the Stream backwards. If seeking
+ // backward from the Stream Footer gives us something that
+ // doesn't begin with Index Indicator, the file is considered
+ // corrupt, not "programming error" or "unrecognized file
+ // format". One could argue that the application should
+ // verify the Index Indicator before trying to decode the
+ // Index, but well, I suppose it is simpler this way.
+ if (in[(*in_pos)++] != INDEX_INDICATOR)
+ return LZMA_DATA_ERROR;
+
+ coder->sequence = SEQ_COUNT;
+ break;
+
+ case SEQ_COUNT:
+ ret = lzma_vli_decode(&coder->count, &coder->pos,
+ in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ coder->pos = 0;
+ coder->sequence = SEQ_MEMUSAGE;
+
+ // Fall through
+
+ case SEQ_MEMUSAGE:
+ if (lzma_index_memusage(1, coder->count) > coder->memlimit) {
+ ret = LZMA_MEMLIMIT_ERROR;
+ goto out;
+ }
+
+ // Tell the Index handling code how many Records this
+ // Index has to allow it to allocate memory more efficiently.
+ lzma_index_prealloc(coder->index, coder->count);
+
+ ret = LZMA_OK;
+ coder->sequence = coder->count == 0
+ ? SEQ_PADDING_INIT : SEQ_UNPADDED;
+ break;
+
+ case SEQ_UNPADDED:
+ case SEQ_UNCOMPRESSED: {
+ lzma_vli *size = coder->sequence == SEQ_UNPADDED
+ ? &coder->unpadded_size
+ : &coder->uncompressed_size;
+
+ ret = lzma_vli_decode(size, &coder->pos,
+ in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ ret = LZMA_OK;
+ coder->pos = 0;
+
+ if (coder->sequence == SEQ_UNPADDED) {
+ // Validate that encoded Unpadded Size isn't too small
+ // or too big.
+ if (coder->unpadded_size < UNPADDED_SIZE_MIN
+ || coder->unpadded_size
+ > UNPADDED_SIZE_MAX)
+ return LZMA_DATA_ERROR;
+
+ coder->sequence = SEQ_UNCOMPRESSED;
+ } else {
+ // Add the decoded Record to the Index.
+ return_if_error(lzma_index_append(
+ coder->index, allocator,
+ coder->unpadded_size,
+ coder->uncompressed_size));
+
+ // Check if this was the last Record.
+ coder->sequence = --coder->count == 0
+ ? SEQ_PADDING_INIT
+ : SEQ_UNPADDED;
+ }
+
+ break;
+ }
+
+ case SEQ_PADDING_INIT:
+ coder->pos = lzma_index_padding_size(coder->index);
+ coder->sequence = SEQ_PADDING;
+
+ // Fall through
+
+ case SEQ_PADDING:
+ if (coder->pos > 0) {
+ --coder->pos;
+ if (in[(*in_pos)++] != 0x00)
+ return LZMA_DATA_ERROR;
+
+ break;
+ }
+
+ // Finish the CRC32 calculation.
+ coder->crc32 = lzma_crc32(in + in_start,
+ *in_pos - in_start, coder->crc32);
+
+ coder->sequence = SEQ_CRC32;
+
+ // Fall through
+
+ case SEQ_CRC32:
+ do {
+ if (*in_pos == in_size)
+ return LZMA_OK;
+
+ if (((coder->crc32 >> (coder->pos * 8)) & 0xFF)
+ != in[(*in_pos)++]) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ return LZMA_DATA_ERROR;
+#endif
+ }
+
+ } while (++coder->pos < 4);
+
+ // Decoding was successful, now we can let the application
+ // see the decoded Index.
+ *coder->index_ptr = coder->index;
+
+ // Make index NULL so we don't free it unintentionally.
+ coder->index = NULL;
+
+ return LZMA_STREAM_END;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+out:
+ // Update the CRC32.
+ //
+ // Avoid null pointer + 0 (undefined behavior) in "in + in_start".
+ // In such a case we had no input and thus in_used == 0.
+ {
+ const size_t in_used = *in_pos - in_start;
+ if (in_used > 0)
+ coder->crc32 = lzma_crc32(in + in_start,
+ in_used, coder->crc32);
+ }
+
+ return ret;
+}
+
+
+static void
+index_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_index_coder *coder = coder_ptr;
+ lzma_index_end(coder->index, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+index_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_index_coder *coder = coder_ptr;
+
+ *memusage = lzma_index_memusage(1, coder->count);
+ *old_memlimit = coder->memlimit;
+
+ if (new_memlimit != 0) {
+ if (new_memlimit < *memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ coder->memlimit = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+index_decoder_reset(lzma_index_coder *coder, const lzma_allocator *allocator,
+ lzma_index **i, uint64_t memlimit)
+{
+ // Remember the pointer given by the application. We will set it
+ // to point to the decoded Index only if decoding is successful.
+ // Before that, keep it NULL so that applications can always safely
+ // pass it to lzma_index_end() no matter did decoding succeed or not.
+ coder->index_ptr = i;
+ *i = NULL;
+
+ // We always allocate a new lzma_index.
+ coder->index = lzma_index_init(allocator);
+ if (coder->index == NULL)
+ return LZMA_MEM_ERROR;
+
+ // Initialize the rest.
+ coder->sequence = SEQ_INDICATOR;
+ coder->memlimit = my_max(1, memlimit);
+ coder->count = 0; // Needs to be initialized due to _memconfig().
+ coder->pos = 0;
+ coder->crc32 = 0;
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_index_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ lzma_index **i, uint64_t memlimit)
+{
+ lzma_next_coder_init(&lzma_index_decoder_init, next, allocator);
+
+ if (i == NULL)
+ return LZMA_PROG_ERROR;
+
+ lzma_index_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &index_decode;
+ next->end = &index_decoder_end;
+ next->memconfig = &index_decoder_memconfig;
+ coder->index = NULL;
+ } else {
+ lzma_index_end(coder->index, allocator);
+ }
+
+ return index_decoder_reset(coder, allocator, i, memlimit);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_decoder(lzma_stream *strm, lzma_index **i, uint64_t memlimit)
+{
+ lzma_next_strm_init(lzma_index_decoder_init, strm, i, memlimit);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_buffer_decode(lzma_index **i, uint64_t *memlimit,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size)
+{
+ // Sanity checks
+ if (i == NULL || memlimit == NULL
+ || in == NULL || in_pos == NULL || *in_pos > in_size)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the decoder.
+ lzma_index_coder coder;
+ return_if_error(index_decoder_reset(&coder, allocator, i, *memlimit));
+
+ // Store the input start position so that we can restore it in case
+ // of an error.
+ const size_t in_start = *in_pos;
+
+ // Do the actual decoding.
+ lzma_ret ret = index_decode(&coder, allocator, in, in_pos, in_size,
+ NULL, NULL, 0, LZMA_RUN);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ // Something went wrong, free the Index structure and restore
+ // the input position.
+ lzma_index_end(coder.index, allocator);
+ *in_pos = in_start;
+
+ if (ret == LZMA_OK) {
+ // The input is truncated or otherwise corrupt.
+ // Use LZMA_DATA_ERROR instead of LZMA_BUF_ERROR
+ // like lzma_vli_decode() does in single-call mode.
+ ret = LZMA_DATA_ERROR;
+
+ } else if (ret == LZMA_MEMLIMIT_ERROR) {
+ // Tell the caller how much memory would have
+ // been needed.
+ *memlimit = lzma_index_memusage(1, coder.count);
+ }
+ }
+
+ return ret;
+}
diff --git a/src/liblzma/common/index_decoder.h b/src/liblzma/common/index_decoder.h
new file mode 100644
index 0000000..3fec483
--- /dev/null
+++ b/src/liblzma/common/index_decoder.h
@@ -0,0 +1,25 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index_decoder.h
+/// \brief Decodes the Index field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_INDEX_DECODER_H
+#define LZMA_INDEX_DECODER_H
+
+#include "common.h"
+#include "index.h"
+
+
+extern lzma_ret lzma_index_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ lzma_index **i, uint64_t memlimit);
+
+
+#endif
diff --git a/src/liblzma/common/index_encoder.c b/src/liblzma/common/index_encoder.c
new file mode 100644
index 0000000..204490c
--- /dev/null
+++ b/src/liblzma/common/index_encoder.c
@@ -0,0 +1,263 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index_encoder.c
+/// \brief Encodes the Index field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "index_encoder.h"
+#include "index.h"
+#include "check.h"
+
+
+typedef struct {
+ enum {
+ SEQ_INDICATOR,
+ SEQ_COUNT,
+ SEQ_UNPADDED,
+ SEQ_UNCOMPRESSED,
+ SEQ_NEXT,
+ SEQ_PADDING,
+ SEQ_CRC32,
+ } sequence;
+
+ /// Index being encoded
+ const lzma_index *index;
+
+ /// Iterator for the Index being encoded
+ lzma_index_iter iter;
+
+ /// Position in integers
+ size_t pos;
+
+ /// CRC32 of the List of Records field
+ uint32_t crc32;
+} lzma_index_coder;
+
+
+static lzma_ret
+index_encode(void *coder_ptr,
+ const lzma_allocator *allocator lzma_attribute((__unused__)),
+ const uint8_t *restrict in lzma_attribute((__unused__)),
+ size_t *restrict in_pos lzma_attribute((__unused__)),
+ size_t in_size lzma_attribute((__unused__)),
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size,
+ lzma_action action lzma_attribute((__unused__)))
+{
+ lzma_index_coder *coder = coder_ptr;
+
+ // Position where to start calculating CRC32. The idea is that we
+ // need to call lzma_crc32() only once per call to index_encode().
+ const size_t out_start = *out_pos;
+
+ // Return value to use if we return at the end of this function.
+ // We use "goto out" to jump out of the while-switch construct
+ // instead of returning directly, because that way we don't need
+ // to copypaste the lzma_crc32() call to many places.
+ lzma_ret ret = LZMA_OK;
+
+ while (*out_pos < out_size)
+ switch (coder->sequence) {
+ case SEQ_INDICATOR:
+ out[*out_pos] = INDEX_INDICATOR;
+ ++*out_pos;
+ coder->sequence = SEQ_COUNT;
+ break;
+
+ case SEQ_COUNT: {
+ const lzma_vli count = lzma_index_block_count(coder->index);
+ ret = lzma_vli_encode(count, &coder->pos,
+ out, out_pos, out_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ ret = LZMA_OK;
+ coder->pos = 0;
+ coder->sequence = SEQ_NEXT;
+ break;
+ }
+
+ case SEQ_NEXT:
+ if (lzma_index_iter_next(
+ &coder->iter, LZMA_INDEX_ITER_BLOCK)) {
+ // Get the size of the Index Padding field.
+ coder->pos = lzma_index_padding_size(coder->index);
+ assert(coder->pos <= 3);
+ coder->sequence = SEQ_PADDING;
+ break;
+ }
+
+ coder->sequence = SEQ_UNPADDED;
+
+ // Fall through
+
+ case SEQ_UNPADDED:
+ case SEQ_UNCOMPRESSED: {
+ const lzma_vli size = coder->sequence == SEQ_UNPADDED
+ ? coder->iter.block.unpadded_size
+ : coder->iter.block.uncompressed_size;
+
+ ret = lzma_vli_encode(size, &coder->pos,
+ out, out_pos, out_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ ret = LZMA_OK;
+ coder->pos = 0;
+
+ // Advance to SEQ_UNCOMPRESSED or SEQ_NEXT.
+ ++coder->sequence;
+ break;
+ }
+
+ case SEQ_PADDING:
+ if (coder->pos > 0) {
+ --coder->pos;
+ out[(*out_pos)++] = 0x00;
+ break;
+ }
+
+ // Finish the CRC32 calculation.
+ coder->crc32 = lzma_crc32(out + out_start,
+ *out_pos - out_start, coder->crc32);
+
+ coder->sequence = SEQ_CRC32;
+
+ // Fall through
+
+ case SEQ_CRC32:
+ // We don't use the main loop, because we don't want
+ // coder->crc32 to be touched anymore.
+ do {
+ if (*out_pos == out_size)
+ return LZMA_OK;
+
+ out[*out_pos] = (coder->crc32 >> (coder->pos * 8))
+ & 0xFF;
+ ++*out_pos;
+
+ } while (++coder->pos < 4);
+
+ return LZMA_STREAM_END;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+out:
+ // Update the CRC32.
+ //
+ // Avoid null pointer + 0 (undefined behavior) in "out + out_start".
+ // In such a case we had no input and thus out_used == 0.
+ {
+ const size_t out_used = *out_pos - out_start;
+ if (out_used > 0)
+ coder->crc32 = lzma_crc32(out + out_start,
+ out_used, coder->crc32);
+ }
+
+ return ret;
+}
+
+
+static void
+index_encoder_end(void *coder, const lzma_allocator *allocator)
+{
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static void
+index_encoder_reset(lzma_index_coder *coder, const lzma_index *i)
+{
+ lzma_index_iter_init(&coder->iter, i);
+
+ coder->sequence = SEQ_INDICATOR;
+ coder->index = i;
+ coder->pos = 0;
+ coder->crc32 = 0;
+
+ return;
+}
+
+
+extern lzma_ret
+lzma_index_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_index *i)
+{
+ lzma_next_coder_init(&lzma_index_encoder_init, next, allocator);
+
+ if (i == NULL)
+ return LZMA_PROG_ERROR;
+
+ if (next->coder == NULL) {
+ next->coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
+ if (next->coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->code = &index_encode;
+ next->end = &index_encoder_end;
+ }
+
+ index_encoder_reset(next->coder, i);
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_encoder(lzma_stream *strm, const lzma_index *i)
+{
+ lzma_next_strm_init(lzma_index_encoder_init, strm, i);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_buffer_encode(const lzma_index *i,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Validate the arguments.
+ if (i == NULL || out == NULL || out_pos == NULL || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // Don't try to encode if there's not enough output space.
+ if (out_size - *out_pos < lzma_index_size(i))
+ return LZMA_BUF_ERROR;
+
+ // The Index encoder needs just one small data structure so we can
+ // allocate it on stack.
+ lzma_index_coder coder;
+ index_encoder_reset(&coder, i);
+
+ // Do the actual encoding. This should never fail, but store
+ // the original *out_pos just in case.
+ const size_t out_start = *out_pos;
+ lzma_ret ret = index_encode(&coder, NULL, NULL, NULL, 0,
+ out, out_pos, out_size, LZMA_RUN);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ // We should never get here, but just in case, restore the
+ // output position and set the error accordingly if something
+ // goes wrong and debugging isn't enabled.
+ assert(0);
+ *out_pos = out_start;
+ ret = LZMA_PROG_ERROR;
+ }
+
+ return ret;
+}
diff --git a/src/liblzma/common/index_encoder.h b/src/liblzma/common/index_encoder.h
new file mode 100644
index 0000000..4d55cd1
--- /dev/null
+++ b/src/liblzma/common/index_encoder.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index_encoder.h
+/// \brief Encodes the Index field
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_INDEX_ENCODER_H
+#define LZMA_INDEX_ENCODER_H
+
+#include "common.h"
+
+
+extern lzma_ret lzma_index_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator, const lzma_index *i);
+
+
+#endif
diff --git a/src/liblzma/common/index_hash.c b/src/liblzma/common/index_hash.c
new file mode 100644
index 0000000..52c3d65
--- /dev/null
+++ b/src/liblzma/common/index_hash.c
@@ -0,0 +1,343 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file index_hash.c
+/// \brief Validates Index by using a hash function
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "index.h"
+#include "check.h"
+
+
+typedef struct {
+ /// Sum of the Block sizes (including Block Padding)
+ lzma_vli blocks_size;
+
+ /// Sum of the Uncompressed Size fields
+ lzma_vli uncompressed_size;
+
+ /// Number of Records
+ lzma_vli count;
+
+ /// Size of the List of Index Records as bytes
+ lzma_vli index_list_size;
+
+ /// Check calculated from Unpadded Sizes and Uncompressed Sizes.
+ lzma_check_state check;
+
+} lzma_index_hash_info;
+
+
+struct lzma_index_hash_s {
+ enum {
+ SEQ_BLOCK,
+ SEQ_COUNT,
+ SEQ_UNPADDED,
+ SEQ_UNCOMPRESSED,
+ SEQ_PADDING_INIT,
+ SEQ_PADDING,
+ SEQ_CRC32,
+ } sequence;
+
+ /// Information collected while decoding the actual Blocks.
+ lzma_index_hash_info blocks;
+
+ /// Information collected from the Index field.
+ lzma_index_hash_info records;
+
+ /// Number of Records not fully decoded
+ lzma_vli remaining;
+
+ /// Unpadded Size currently being read from an Index Record.
+ lzma_vli unpadded_size;
+
+ /// Uncompressed Size currently being read from an Index Record.
+ lzma_vli uncompressed_size;
+
+ /// Position in variable-length integers when decoding them from
+ /// the List of Records.
+ size_t pos;
+
+ /// CRC32 of the Index
+ uint32_t crc32;
+};
+
+
+extern LZMA_API(lzma_index_hash *)
+lzma_index_hash_init(lzma_index_hash *index_hash,
+ const lzma_allocator *allocator)
+{
+ if (index_hash == NULL) {
+ index_hash = lzma_alloc(sizeof(lzma_index_hash), allocator);
+ if (index_hash == NULL)
+ return NULL;
+ }
+
+ index_hash->sequence = SEQ_BLOCK;
+ index_hash->blocks.blocks_size = 0;
+ index_hash->blocks.uncompressed_size = 0;
+ index_hash->blocks.count = 0;
+ index_hash->blocks.index_list_size = 0;
+ index_hash->records.blocks_size = 0;
+ index_hash->records.uncompressed_size = 0;
+ index_hash->records.count = 0;
+ index_hash->records.index_list_size = 0;
+ index_hash->unpadded_size = 0;
+ index_hash->uncompressed_size = 0;
+ index_hash->pos = 0;
+ index_hash->crc32 = 0;
+
+ // These cannot fail because LZMA_CHECK_BEST is known to be supported.
+ (void)lzma_check_init(&index_hash->blocks.check, LZMA_CHECK_BEST);
+ (void)lzma_check_init(&index_hash->records.check, LZMA_CHECK_BEST);
+
+ return index_hash;
+}
+
+
+extern LZMA_API(void)
+lzma_index_hash_end(lzma_index_hash *index_hash,
+ const lzma_allocator *allocator)
+{
+ lzma_free(index_hash, allocator);
+ return;
+}
+
+
+extern LZMA_API(lzma_vli)
+lzma_index_hash_size(const lzma_index_hash *index_hash)
+{
+ // Get the size of the Index from ->blocks instead of ->records for
+ // cases where application wants to know the Index Size before
+ // decoding the Index.
+ return index_size(index_hash->blocks.count,
+ index_hash->blocks.index_list_size);
+}
+
+
+/// Updates the sizes and the hash without any validation.
+static void
+hash_append(lzma_index_hash_info *info, lzma_vli unpadded_size,
+ lzma_vli uncompressed_size)
+{
+ info->blocks_size += vli_ceil4(unpadded_size);
+ info->uncompressed_size += uncompressed_size;
+ info->index_list_size += lzma_vli_size(unpadded_size)
+ + lzma_vli_size(uncompressed_size);
+ ++info->count;
+
+ const lzma_vli sizes[2] = { unpadded_size, uncompressed_size };
+ lzma_check_update(&info->check, LZMA_CHECK_BEST,
+ (const uint8_t *)(sizes), sizeof(sizes));
+
+ return;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_hash_append(lzma_index_hash *index_hash, lzma_vli unpadded_size,
+ lzma_vli uncompressed_size)
+{
+ // Validate the arguments.
+ if (index_hash == NULL || index_hash->sequence != SEQ_BLOCK
+ || unpadded_size < UNPADDED_SIZE_MIN
+ || unpadded_size > UNPADDED_SIZE_MAX
+ || uncompressed_size > LZMA_VLI_MAX)
+ return LZMA_PROG_ERROR;
+
+ // Update the hash.
+ hash_append(&index_hash->blocks, unpadded_size, uncompressed_size);
+
+ // Validate the properties of *info are still in allowed limits.
+ if (index_hash->blocks.blocks_size > LZMA_VLI_MAX
+ || index_hash->blocks.uncompressed_size > LZMA_VLI_MAX
+ || index_size(index_hash->blocks.count,
+ index_hash->blocks.index_list_size)
+ > LZMA_BACKWARD_SIZE_MAX
+ || index_stream_size(index_hash->blocks.blocks_size,
+ index_hash->blocks.count,
+ index_hash->blocks.index_list_size)
+ > LZMA_VLI_MAX)
+ return LZMA_DATA_ERROR;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_index_hash_decode(lzma_index_hash *index_hash, const uint8_t *in,
+ size_t *in_pos, size_t in_size)
+{
+ // Catch zero input buffer here, because in contrast to Index encoder
+ // and decoder functions, applications call this function directly
+ // instead of via lzma_code(), which does the buffer checking.
+ if (*in_pos >= in_size)
+ return LZMA_BUF_ERROR;
+
+ // NOTE: This function has many similarities to index_encode() and
+ // index_decode() functions found from index_encoder.c and
+ // index_decoder.c. See the comments especially in index_encoder.c.
+ const size_t in_start = *in_pos;
+ lzma_ret ret = LZMA_OK;
+
+ while (*in_pos < in_size)
+ switch (index_hash->sequence) {
+ case SEQ_BLOCK:
+ // Check the Index Indicator is present.
+ if (in[(*in_pos)++] != INDEX_INDICATOR)
+ return LZMA_DATA_ERROR;
+
+ index_hash->sequence = SEQ_COUNT;
+ break;
+
+ case SEQ_COUNT: {
+ ret = lzma_vli_decode(&index_hash->remaining,
+ &index_hash->pos, in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ // The count must match the count of the Blocks decoded.
+ if (index_hash->remaining != index_hash->blocks.count)
+ return LZMA_DATA_ERROR;
+
+ ret = LZMA_OK;
+ index_hash->pos = 0;
+
+ // Handle the special case when there are no Blocks.
+ index_hash->sequence = index_hash->remaining == 0
+ ? SEQ_PADDING_INIT : SEQ_UNPADDED;
+ break;
+ }
+
+ case SEQ_UNPADDED:
+ case SEQ_UNCOMPRESSED: {
+ lzma_vli *size = index_hash->sequence == SEQ_UNPADDED
+ ? &index_hash->unpadded_size
+ : &index_hash->uncompressed_size;
+
+ ret = lzma_vli_decode(size, &index_hash->pos,
+ in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ goto out;
+
+ ret = LZMA_OK;
+ index_hash->pos = 0;
+
+ if (index_hash->sequence == SEQ_UNPADDED) {
+ if (index_hash->unpadded_size < UNPADDED_SIZE_MIN
+ || index_hash->unpadded_size
+ > UNPADDED_SIZE_MAX)
+ return LZMA_DATA_ERROR;
+
+ index_hash->sequence = SEQ_UNCOMPRESSED;
+ } else {
+ // Update the hash.
+ hash_append(&index_hash->records,
+ index_hash->unpadded_size,
+ index_hash->uncompressed_size);
+
+ // Verify that we don't go over the known sizes. Note
+ // that this validation is simpler than the one used
+ // in lzma_index_hash_append(), because here we know
+ // that values in index_hash->blocks are already
+ // validated and we are fine as long as we don't
+ // exceed them in index_hash->records.
+ if (index_hash->blocks.blocks_size
+ < index_hash->records.blocks_size
+ || index_hash->blocks.uncompressed_size
+ < index_hash->records.uncompressed_size
+ || index_hash->blocks.index_list_size
+ < index_hash->records.index_list_size)
+ return LZMA_DATA_ERROR;
+
+ // Check if this was the last Record.
+ index_hash->sequence = --index_hash->remaining == 0
+ ? SEQ_PADDING_INIT : SEQ_UNPADDED;
+ }
+
+ break;
+ }
+
+ case SEQ_PADDING_INIT:
+ index_hash->pos = (LZMA_VLI_C(4) - index_size_unpadded(
+ index_hash->records.count,
+ index_hash->records.index_list_size)) & 3;
+ index_hash->sequence = SEQ_PADDING;
+
+ // Fall through
+
+ case SEQ_PADDING:
+ if (index_hash->pos > 0) {
+ --index_hash->pos;
+ if (in[(*in_pos)++] != 0x00)
+ return LZMA_DATA_ERROR;
+
+ break;
+ }
+
+ // Compare the sizes.
+ if (index_hash->blocks.blocks_size
+ != index_hash->records.blocks_size
+ || index_hash->blocks.uncompressed_size
+ != index_hash->records.uncompressed_size
+ || index_hash->blocks.index_list_size
+ != index_hash->records.index_list_size)
+ return LZMA_DATA_ERROR;
+
+ // Finish the hashes and compare them.
+ lzma_check_finish(&index_hash->blocks.check, LZMA_CHECK_BEST);
+ lzma_check_finish(&index_hash->records.check, LZMA_CHECK_BEST);
+ if (memcmp(index_hash->blocks.check.buffer.u8,
+ index_hash->records.check.buffer.u8,
+ lzma_check_size(LZMA_CHECK_BEST)) != 0)
+ return LZMA_DATA_ERROR;
+
+ // Finish the CRC32 calculation.
+ index_hash->crc32 = lzma_crc32(in + in_start,
+ *in_pos - in_start, index_hash->crc32);
+
+ index_hash->sequence = SEQ_CRC32;
+
+ // Fall through
+
+ case SEQ_CRC32:
+ do {
+ if (*in_pos == in_size)
+ return LZMA_OK;
+
+ if (((index_hash->crc32 >> (index_hash->pos * 8))
+ & 0xFF) != in[(*in_pos)++]) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ return LZMA_DATA_ERROR;
+#endif
+ }
+
+ } while (++index_hash->pos < 4);
+
+ return LZMA_STREAM_END;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+out:
+ // Update the CRC32.
+ //
+ // Avoid null pointer + 0 (undefined behavior) in "in + in_start".
+ // In such a case we had no input and thus in_used == 0.
+ {
+ const size_t in_used = *in_pos - in_start;
+ if (in_used > 0)
+ index_hash->crc32 = lzma_crc32(in + in_start,
+ in_used, index_hash->crc32);
+ }
+
+ return ret;
+}
diff --git a/src/liblzma/common/lzip_decoder.c b/src/liblzma/common/lzip_decoder.c
new file mode 100644
index 0000000..88cc7ff
--- /dev/null
+++ b/src/liblzma/common/lzip_decoder.c
@@ -0,0 +1,418 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzip_decoder.c
+/// \brief Decodes .lz (lzip) files
+//
+// Author: Michał Górny
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzip_decoder.h"
+#include "lzma_decoder.h"
+#include "check.h"
+
+
+// .lz format version 0 lacks the 64-bit Member size field in the footer.
+#define LZIP_V0_FOOTER_SIZE 12
+#define LZIP_V1_FOOTER_SIZE 20
+#define LZIP_FOOTER_SIZE_MAX LZIP_V1_FOOTER_SIZE
+
+// lc/lp/pb are hardcoded in the .lz format.
+#define LZIP_LC 3
+#define LZIP_LP 0
+#define LZIP_PB 2
+
+
+typedef struct {
+ enum {
+ SEQ_ID_STRING,
+ SEQ_VERSION,
+ SEQ_DICT_SIZE,
+ SEQ_CODER_INIT,
+ SEQ_LZMA_STREAM,
+ SEQ_MEMBER_FOOTER,
+ } sequence;
+
+ /// .lz member format version
+ uint32_t version;
+
+ /// CRC32 of the uncompressed data in the .lz member
+ uint32_t crc32;
+
+ /// Uncompressed size of the .lz member
+ uint64_t uncompressed_size;
+
+ /// Compressed size of the .lz member
+ uint64_t member_size;
+
+ /// Memory usage limit
+ uint64_t memlimit;
+
+ /// Amount of memory actually needed
+ uint64_t memusage;
+
+ /// If true, LZMA_GET_CHECK is returned after decoding the header
+ /// fields. As all files use CRC32 this is redundant but it's
+ /// implemented anyway since the initialization functions supports
+ /// all other flags in addition to LZMA_TELL_ANY_CHECK.
+ bool tell_any_check;
+
+ /// If true, we won't calculate or verify the CRC32 of
+ /// the uncompressed data.
+ bool ignore_check;
+
+ /// If true, we will decode concatenated .lz members and stop if
+ /// non-.lz data is seen after at least one member has been
+ /// successfully decoded.
+ bool concatenated;
+
+ /// When decoding concatenated .lz members, this is true as long as
+ /// we are decoding the first .lz member. This is needed to avoid
+ /// incorrect LZMA_FORMAT_ERROR in case there is non-.lz data at
+ /// the end of the file.
+ bool first_member;
+
+ /// Reading position in the header and footer fields
+ size_t pos;
+
+ /// Buffer to hold the .lz footer fields
+ uint8_t buffer[LZIP_FOOTER_SIZE_MAX];
+
+ /// Options decoded from the .lz header that needed to initialize
+ /// the LZMA1 decoder.
+ lzma_options_lzma options;
+
+ /// LZMA1 decoder
+ lzma_next_coder lzma_decoder;
+
+} lzma_lzip_coder;
+
+
+static lzma_ret
+lzip_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_lzip_coder *coder = coder_ptr;
+
+ while (true)
+ switch (coder->sequence) {
+ case SEQ_ID_STRING: {
+ // The "ID string" or magic bytes are "LZIP" in US-ASCII.
+ const uint8_t lzip_id_string[4] = { 0x4C, 0x5A, 0x49, 0x50 };
+
+ while (coder->pos < sizeof(lzip_id_string)) {
+ if (*in_pos >= in_size) {
+ // If we are on the 2nd+ concatenated member
+ // and the input ends before we can read
+ // the magic bytes, we discard the bytes that
+ // were already read (up to 3) and finish.
+ // See the reasoning below.
+ return !coder->first_member
+ && action == LZMA_FINISH
+ ? LZMA_STREAM_END : LZMA_OK;
+ }
+
+ if (in[*in_pos] != lzip_id_string[coder->pos]) {
+ // The .lz format allows putting non-.lz data
+ // at the end of the file. If we have seen
+ // at least one valid .lz member already,
+ // then we won't consume the byte at *in_pos
+ // and will return LZMA_STREAM_END. This way
+ // apps can easily locate and read the non-.lz
+ // data after the .lz member(s).
+ //
+ // NOTE: If the first 1-3 bytes of the non-.lz
+ // data match the .lz ID string then the first
+ // 1-3 bytes of the junk will get ignored by
+ // us. If apps want to properly locate the
+ // trailing data they must ensure that the
+ // first byte of their custom data isn't the
+ // same as the first byte of .lz ID string.
+ // With the liblzma API we cannot rewind the
+ // input position across calls to lzma_code().
+ return !coder->first_member
+ ? LZMA_STREAM_END : LZMA_FORMAT_ERROR;
+ }
+
+ ++*in_pos;
+ ++coder->pos;
+ }
+
+ coder->pos = 0;
+
+ coder->crc32 = 0;
+ coder->uncompressed_size = 0;
+ coder->member_size = sizeof(lzip_id_string);
+
+ coder->sequence = SEQ_VERSION;
+ }
+
+ // Fall through
+
+ case SEQ_VERSION:
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ coder->version = in[(*in_pos)++];
+
+ // We support version 0 and unextended version 1.
+ if (coder->version > 1)
+ return LZMA_OPTIONS_ERROR;
+
+ ++coder->member_size;
+ coder->sequence = SEQ_DICT_SIZE;
+
+ // .lz versions 0 and 1 use CRC32 as the integrity check
+ // so if the application wanted to know that
+ // (LZMA_TELL_ANY_CHECK) we can tell it now.
+ if (coder->tell_any_check)
+ return LZMA_GET_CHECK;
+
+ // Fall through
+
+ case SEQ_DICT_SIZE: {
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ const uint32_t ds = in[(*in_pos)++];
+ ++coder->member_size;
+
+ // The five lowest bits are for the base-2 logarithm of
+ // the dictionary size and the highest three bits are
+ // the fractional part (0/16 to 7/16) that will be
+ // subtracted to get the final value.
+ //
+ // For example, with 0xB5:
+ // b2log = 21
+ // fracnum = 5
+ // dict_size = 2^21 - 2^21 * 5 / 16 = 1408 KiB
+ const uint32_t b2log = ds & 0x1F;
+ const uint32_t fracnum = ds >> 5;
+
+ // The format versions 0 and 1 allow dictionary size in the
+ // range [4 KiB, 512 MiB].
+ if (b2log < 12 || b2log > 29 || (b2log == 12 && fracnum > 0))
+ return LZMA_DATA_ERROR;
+
+ // 2^[b2log] - 2^[b2log] * [fracnum] / 16
+ // = 2^[b2log] - [fracnum] * 2^([b2log] - 4)
+ coder->options.dict_size = (UINT32_C(1) << b2log)
+ - (fracnum << (b2log - 4));
+
+ assert(coder->options.dict_size >= 4096);
+ assert(coder->options.dict_size <= (UINT32_C(512) << 20));
+
+ coder->options.preset_dict = NULL;
+ coder->options.lc = LZIP_LC;
+ coder->options.lp = LZIP_LP;
+ coder->options.pb = LZIP_PB;
+
+ // Calculate the memory usage.
+ coder->memusage = lzma_lzma_decoder_memusage(&coder->options)
+ + LZMA_MEMUSAGE_BASE;
+
+ // Initialization is a separate step because if we return
+ // LZMA_MEMLIMIT_ERROR we need to be able to restart after
+ // the memlimit has been increased.
+ coder->sequence = SEQ_CODER_INIT;
+ }
+
+ // Fall through
+
+ case SEQ_CODER_INIT: {
+ if (coder->memusage > coder->memlimit)
+ return LZMA_MEMLIMIT_ERROR;
+
+ const lzma_filter_info filters[2] = {
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .init = &lzma_lzma_decoder_init,
+ .options = &coder->options,
+ }, {
+ .init = NULL,
+ }
+ };
+
+ return_if_error(lzma_next_filter_init(&coder->lzma_decoder,
+ allocator, filters));
+
+ coder->crc32 = 0;
+ coder->sequence = SEQ_LZMA_STREAM;
+ }
+
+ // Fall through
+
+ case SEQ_LZMA_STREAM: {
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ const lzma_ret ret = coder->lzma_decoder.code(
+ coder->lzma_decoder.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ action);
+
+ const size_t out_used = *out_pos - out_start;
+
+ coder->member_size += *in_pos - in_start;
+ coder->uncompressed_size += out_used;
+
+ // Don't update the CRC32 if the integrity check will be
+ // ignored or if there was no new output. The latter is
+ // important in case out == NULL to avoid null pointer + 0
+ // which is undefined behavior.
+ if (!coder->ignore_check && out_used > 0)
+ coder->crc32 = lzma_crc32(out + out_start, out_used,
+ coder->crc32);
+
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ coder->sequence = SEQ_MEMBER_FOOTER;
+ }
+
+ // Fall through
+
+ case SEQ_MEMBER_FOOTER: {
+ // The footer of .lz version 0 lacks the Member size field.
+ // This is the only difference between version 0 and
+ // unextended version 1 formats.
+ const size_t footer_size = coder->version == 0
+ ? LZIP_V0_FOOTER_SIZE
+ : LZIP_V1_FOOTER_SIZE;
+
+ // Copy the CRC32, Data size, and Member size fields to
+ // the internal buffer.
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ footer_size);
+
+ // Return if we didn't get the whole footer yet.
+ if (coder->pos < footer_size)
+ return LZMA_OK;
+
+ coder->pos = 0;
+ coder->member_size += footer_size;
+
+ // Check that the footer fields match the observed data.
+ if (!coder->ignore_check
+ && coder->crc32 != read32le(&coder->buffer[0]))
+ return LZMA_DATA_ERROR;
+
+ if (coder->uncompressed_size != read64le(&coder->buffer[4]))
+ return LZMA_DATA_ERROR;
+
+ if (coder->version > 0) {
+ // .lz version 0 has no Member size field.
+ if (coder->member_size != read64le(&coder->buffer[12]))
+ return LZMA_DATA_ERROR;
+ }
+
+ // Decoding is finished if we weren't requested to decode
+ // more than one .lz member.
+ if (!coder->concatenated)
+ return LZMA_STREAM_END;
+
+ coder->first_member = false;
+ coder->sequence = SEQ_ID_STRING;
+ break;
+ }
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ // Never reached
+}
+
+
+static void
+lzip_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_lzip_coder *coder = coder_ptr;
+ lzma_next_end(&coder->lzma_decoder, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_check
+lzip_decoder_get_check(const void *coder_ptr lzma_attribute((__unused__)))
+{
+ return LZMA_CHECK_CRC32;
+}
+
+
+static lzma_ret
+lzip_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_lzip_coder *coder = coder_ptr;
+
+ *memusage = coder->memusage;
+ *old_memlimit = coder->memlimit;
+
+ if (new_memlimit != 0) {
+ if (new_memlimit < coder->memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ coder->memlimit = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_lzip_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_coder_init(&lzma_lzip_decoder_init, next, allocator);
+
+ if (flags & ~LZMA_SUPPORTED_FLAGS)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_lzip_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_lzip_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &lzip_decode;
+ next->end = &lzip_decoder_end;
+ next->get_check = &lzip_decoder_get_check;
+ next->memconfig = &lzip_decoder_memconfig;
+
+ coder->lzma_decoder = LZMA_NEXT_CODER_INIT;
+ }
+
+ coder->sequence = SEQ_ID_STRING;
+ coder->memlimit = my_max(1, memlimit);
+ coder->memusage = LZMA_MEMUSAGE_BASE;
+ coder->tell_any_check = (flags & LZMA_TELL_ANY_CHECK) != 0;
+ coder->ignore_check = (flags & LZMA_IGNORE_CHECK) != 0;
+ coder->concatenated = (flags & LZMA_CONCATENATED) != 0;
+ coder->first_member = true;
+ coder->pos = 0;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_lzip_decoder(lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_strm_init(lzma_lzip_decoder_init, strm, memlimit, flags);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/lzip_decoder.h b/src/liblzma/common/lzip_decoder.h
new file mode 100644
index 0000000..33a01c3
--- /dev/null
+++ b/src/liblzma/common/lzip_decoder.h
@@ -0,0 +1,22 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzip_decoder.h
+/// \brief Decodes .lz (lzip) files
+//
+// Author: Michał Górny
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZIP_DECODER_H
+#define LZMA_LZIP_DECODER_H
+
+#include "common.h"
+
+extern lzma_ret lzma_lzip_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, uint32_t flags);
+
+#endif
diff --git a/src/liblzma/common/memcmplen.h b/src/liblzma/common/memcmplen.h
new file mode 100644
index 0000000..99d9c51
--- /dev/null
+++ b/src/liblzma/common/memcmplen.h
@@ -0,0 +1,173 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file memcmplen.h
+/// \brief Optimized comparison of two buffers
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_MEMCMPLEN_H
+#define LZMA_MEMCMPLEN_H
+
+#include "common.h"
+
+#ifdef HAVE_IMMINTRIN_H
+# include <immintrin.h>
+#endif
+
+// Only include <intrin.h> if it is needed. The header is only needed
+// on Windows when using an MSVC compatible compiler. The Intel compiler
+// can use the intrinsics without the header file.
+#if defined(TUKLIB_FAST_UNALIGNED_ACCESS) \
+ && defined(_MSC_VER) \
+ && defined(_M_X64) \
+ && !defined(__INTEL_COMPILER)
+# include <intrin.h>
+#endif
+
+
+/// Find out how many equal bytes the two buffers have.
+///
+/// \param buf1 First buffer
+/// \param buf2 Second buffer
+/// \param len How many bytes have already been compared and will
+/// be assumed to match
+/// \param limit How many bytes to compare at most, including the
+/// already-compared bytes. This must be significantly
+/// smaller than UINT32_MAX to avoid integer overflows.
+/// Up to LZMA_MEMCMPLEN_EXTRA bytes may be read past
+/// the specified limit from both buf1 and buf2.
+///
+/// \return Number of equal bytes in the buffers is returned.
+/// This is always at least len and at most limit.
+///
+/// \note LZMA_MEMCMPLEN_EXTRA defines how many extra bytes may be read.
+/// It's rounded up to 2^n. This extra amount needs to be
+/// allocated in the buffers being used. It needs to be
+/// initialized too to keep Valgrind quiet.
+static lzma_always_inline uint32_t
+lzma_memcmplen(const uint8_t *buf1, const uint8_t *buf2,
+ uint32_t len, uint32_t limit)
+{
+ assert(len <= limit);
+ assert(limit <= UINT32_MAX / 2);
+
+#if defined(TUKLIB_FAST_UNALIGNED_ACCESS) \
+ && ((TUKLIB_GNUC_REQ(3, 4) && defined(__x86_64__)) \
+ || (defined(__INTEL_COMPILER) && defined(__x86_64__)) \
+ || (defined(__INTEL_COMPILER) && defined(_M_X64)) \
+ || (defined(_MSC_VER) && defined(_M_X64)))
+ // I keep this x86-64 only for now since that's where I know this
+ // to be a good method. This may be fine on other 64-bit CPUs too.
+ // On big endian one should use xor instead of subtraction and switch
+ // to __builtin_clzll().
+#define LZMA_MEMCMPLEN_EXTRA 8
+ while (len < limit) {
+ const uint64_t x = read64ne(buf1 + len) - read64ne(buf2 + len);
+ if (x != 0) {
+ // MSVC or Intel C compiler on Windows
+# if (defined(_MSC_VER) || defined(__INTEL_COMPILER)) && defined(_M_X64)
+ unsigned long tmp;
+ _BitScanForward64(&tmp, x);
+ len += (uint32_t)tmp >> 3;
+ // GCC, Clang, or Intel C compiler
+# else
+ len += (uint32_t)__builtin_ctzll(x) >> 3;
+# endif
+ return my_min(len, limit);
+ }
+
+ len += 8;
+ }
+
+ return limit;
+
+#elif defined(TUKLIB_FAST_UNALIGNED_ACCESS) \
+ && defined(HAVE__MM_MOVEMASK_EPI8) \
+ && (defined(__SSE2__) \
+ || (defined(_MSC_VER) && defined(_M_IX86_FP) \
+ && _M_IX86_FP >= 2))
+ // NOTE: This will use 128-bit unaligned access which
+ // TUKLIB_FAST_UNALIGNED_ACCESS wasn't meant to permit,
+ // but it's convenient here since this is x86-only.
+ //
+ // SSE2 version for 32-bit and 64-bit x86. On x86-64 the above
+ // version is sometimes significantly faster and sometimes
+ // slightly slower than this SSE2 version, so this SSE2
+ // version isn't used on x86-64.
+# define LZMA_MEMCMPLEN_EXTRA 16
+ while (len < limit) {
+ const uint32_t x = 0xFFFF ^ (uint32_t)_mm_movemask_epi8(
+ _mm_cmpeq_epi8(
+ _mm_loadu_si128((const __m128i *)(buf1 + len)),
+ _mm_loadu_si128((const __m128i *)(buf2 + len))));
+
+ if (x != 0) {
+ len += ctz32(x);
+ return my_min(len, limit);
+ }
+
+ len += 16;
+ }
+
+ return limit;
+
+#elif defined(TUKLIB_FAST_UNALIGNED_ACCESS) && !defined(WORDS_BIGENDIAN)
+ // Generic 32-bit little endian method
+# define LZMA_MEMCMPLEN_EXTRA 4
+ while (len < limit) {
+ uint32_t x = read32ne(buf1 + len) - read32ne(buf2 + len);
+ if (x != 0) {
+ if ((x & 0xFFFF) == 0) {
+ len += 2;
+ x >>= 16;
+ }
+
+ if ((x & 0xFF) == 0)
+ ++len;
+
+ return my_min(len, limit);
+ }
+
+ len += 4;
+ }
+
+ return limit;
+
+#elif defined(TUKLIB_FAST_UNALIGNED_ACCESS) && defined(WORDS_BIGENDIAN)
+ // Generic 32-bit big endian method
+# define LZMA_MEMCMPLEN_EXTRA 4
+ while (len < limit) {
+ uint32_t x = read32ne(buf1 + len) ^ read32ne(buf2 + len);
+ if (x != 0) {
+ if ((x & 0xFFFF0000) == 0) {
+ len += 2;
+ x <<= 16;
+ }
+
+ if ((x & 0xFF000000) == 0)
+ ++len;
+
+ return my_min(len, limit);
+ }
+
+ len += 4;
+ }
+
+ return limit;
+
+#else
+ // Simple portable version that doesn't use unaligned access.
+# define LZMA_MEMCMPLEN_EXTRA 0
+ while (len < limit && buf1[len] == buf2[len])
+ ++len;
+
+ return len;
+#endif
+}
+
+#endif
diff --git a/src/liblzma/common/microlzma_decoder.c b/src/liblzma/common/microlzma_decoder.c
new file mode 100644
index 0000000..e473373
--- /dev/null
+++ b/src/liblzma/common/microlzma_decoder.c
@@ -0,0 +1,221 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file microlzma_decoder.c
+/// \brief Decode MicroLZMA format
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma_decoder.h"
+#include "lz_decoder.h"
+
+
+typedef struct {
+ /// LZMA1 decoder
+ lzma_next_coder lzma;
+
+ /// Compressed size of the stream as given by the application.
+ /// This must be exactly correct.
+ ///
+ /// This will be decremented when input is read.
+ uint64_t comp_size;
+
+ /// Uncompressed size of the stream as given by the application.
+ /// This may be less than the actual uncompressed size if
+ /// uncomp_size_is_exact is false.
+ ///
+ /// This will be decremented when output is produced.
+ lzma_vli uncomp_size;
+
+ /// LZMA dictionary size as given by the application
+ uint32_t dict_size;
+
+ /// If true, the exact uncompressed size is known. If false,
+ /// uncomp_size may be smaller than the real uncompressed size;
+ /// uncomp_size may never be bigger than the real uncompressed size.
+ bool uncomp_size_is_exact;
+
+ /// True once the first byte of the MicroLZMA stream
+ /// has been processed.
+ bool props_decoded;
+} lzma_microlzma_coder;
+
+
+static lzma_ret
+microlzma_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_microlzma_coder *coder = coder_ptr;
+
+ // Remember the in start position so that we can update comp_size.
+ const size_t in_start = *in_pos;
+
+ // Remember the out start position so that we can update uncomp_size.
+ const size_t out_start = *out_pos;
+
+ // Limit the amount of input so that the decoder won't read more than
+ // comp_size. This is required when uncomp_size isn't exact because
+ // in that case the LZMA decoder will try to decode more input even
+ // when it has no output space (it can be looking for EOPM).
+ if (in_size - *in_pos > coder->comp_size)
+ in_size = *in_pos + (size_t)(coder->comp_size);
+
+ // When the exact uncompressed size isn't known, we must limit
+ // the available output space to prevent the LZMA decoder from
+ // trying to decode too much.
+ if (!coder->uncomp_size_is_exact
+ && out_size - *out_pos > coder->uncomp_size)
+ out_size = *out_pos + (size_t)(coder->uncomp_size);
+
+ if (!coder->props_decoded) {
+ // There must be at least one byte of input to decode
+ // the properties byte.
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ lzma_options_lzma options = {
+ .dict_size = coder->dict_size,
+ .preset_dict = NULL,
+ .preset_dict_size = 0,
+ .ext_flags = 0, // EOPM not allowed when size is known
+ .ext_size_low = UINT32_MAX, // Unknown size by default
+ .ext_size_high = UINT32_MAX,
+ };
+
+ if (coder->uncomp_size_is_exact)
+ lzma_set_ext_size(options, coder->uncomp_size);
+
+ // The properties are stored as bitwise-negation
+ // of the typical encoding.
+ if (lzma_lzma_lclppb_decode(&options, ~in[*in_pos]))
+ return LZMA_OPTIONS_ERROR;
+
+ ++*in_pos;
+
+ // Initialize the decoder.
+ lzma_filter_info filters[2] = {
+ {
+ .id = LZMA_FILTER_LZMA1EXT,
+ .init = &lzma_lzma_decoder_init,
+ .options = &options,
+ }, {
+ .init = NULL,
+ }
+ };
+
+ return_if_error(lzma_next_filter_init(&coder->lzma,
+ allocator, filters));
+
+ // Pass one dummy 0x00 byte to the LZMA decoder since that
+ // is what it expects the first byte to be.
+ const uint8_t dummy_in = 0;
+ size_t dummy_in_pos = 0;
+ if (coder->lzma.code(coder->lzma.coder, allocator,
+ &dummy_in, &dummy_in_pos, 1,
+ out, out_pos, out_size, LZMA_RUN) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ assert(dummy_in_pos == 1);
+ coder->props_decoded = true;
+ }
+
+ // The rest is normal LZMA decoding.
+ lzma_ret ret = coder->lzma.code(coder->lzma.coder, allocator,
+ in, in_pos, in_size,
+ out, out_pos, out_size, action);
+
+ // Update the remaining compressed size.
+ assert(coder->comp_size >= *in_pos - in_start);
+ coder->comp_size -= *in_pos - in_start;
+
+ if (coder->uncomp_size_is_exact) {
+ // After successful decompression of the complete stream
+ // the compressed size must match.
+ if (ret == LZMA_STREAM_END && coder->comp_size != 0)
+ ret = LZMA_DATA_ERROR;
+ } else {
+ // Update the amount of output remaining.
+ assert(coder->uncomp_size >= *out_pos - out_start);
+ coder->uncomp_size -= *out_pos - out_start;
+
+ // - We must not get LZMA_STREAM_END because the stream
+ // shouldn't have EOPM.
+ // - We must use uncomp_size to determine when to
+ // return LZMA_STREAM_END.
+ if (ret == LZMA_STREAM_END)
+ ret = LZMA_DATA_ERROR;
+ else if (coder->uncomp_size == 0)
+ ret = LZMA_STREAM_END;
+ }
+
+ return ret;
+}
+
+
+static void
+microlzma_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_microlzma_coder *coder = coder_ptr;
+ lzma_next_end(&coder->lzma, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+microlzma_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t comp_size,
+ uint64_t uncomp_size, bool uncomp_size_is_exact,
+ uint32_t dict_size)
+{
+ lzma_next_coder_init(&microlzma_decoder_init, next, allocator);
+
+ lzma_microlzma_coder *coder = next->coder;
+
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_microlzma_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &microlzma_decode;
+ next->end = &microlzma_decoder_end;
+
+ coder->lzma = LZMA_NEXT_CODER_INIT;
+ }
+
+ // The public API is uint64_t but the internal LZ decoder API uses
+ // lzma_vli.
+ if (uncomp_size > LZMA_VLI_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ coder->comp_size = comp_size;
+ coder->uncomp_size = uncomp_size;
+ coder->uncomp_size_is_exact = uncomp_size_is_exact;
+ coder->dict_size = dict_size;
+
+ coder->props_decoded = false;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_microlzma_decoder(lzma_stream *strm, uint64_t comp_size,
+ uint64_t uncomp_size, lzma_bool uncomp_size_is_exact,
+ uint32_t dict_size)
+{
+ lzma_next_strm_init(microlzma_decoder_init, strm, comp_size,
+ uncomp_size, uncomp_size_is_exact, dict_size);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/microlzma_encoder.c b/src/liblzma/common/microlzma_encoder.c
new file mode 100644
index 0000000..a787ca2
--- /dev/null
+++ b/src/liblzma/common/microlzma_encoder.c
@@ -0,0 +1,141 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file microlzma_encoder.c
+/// \brief Encode into MicroLZMA format
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma_encoder.h"
+
+
+typedef struct {
+ /// LZMA1 encoder
+ lzma_next_coder lzma;
+
+ /// LZMA properties byte (lc/lp/pb)
+ uint8_t props;
+} lzma_microlzma_coder;
+
+
+static lzma_ret
+microlzma_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_microlzma_coder *coder = coder_ptr;
+
+ // Remember *out_pos so that we can overwrite the first byte with
+ // the LZMA properties byte.
+ const size_t out_start = *out_pos;
+
+ // Remember *in_pos so that we can set it based on how many
+ // uncompressed bytes were actually encoded.
+ const size_t in_start = *in_pos;
+
+ // Set the output size limit based on the available output space.
+ // We know that the encoder supports set_out_limit() so
+ // LZMA_OPTIONS_ERROR isn't possible. LZMA_BUF_ERROR is possible
+ // but lzma_code() has an assertion to not allow it to be returned
+ // from here and I don't want to change that for now, so
+ // LZMA_BUF_ERROR becomes LZMA_PROG_ERROR.
+ uint64_t uncomp_size;
+ if (coder->lzma.set_out_limit(coder->lzma.coder,
+ &uncomp_size, out_size - *out_pos) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ // set_out_limit fails if this isn't true.
+ assert(out_size - *out_pos >= 6);
+
+ // Encode as much as possible.
+ const lzma_ret ret = coder->lzma.code(coder->lzma.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size, action);
+
+ if (ret != LZMA_STREAM_END) {
+ if (ret == LZMA_OK) {
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ return ret;
+ }
+
+ // The first output byte is bitwise-negation of the properties byte.
+ // We know that there is space for this byte because set_out_limit
+ // and the actual encoding succeeded.
+ out[out_start] = (uint8_t)(~coder->props);
+
+ // The LZMA encoder likely read more input than it was able to encode.
+ // Set *in_pos based on uncomp_size.
+ assert(uncomp_size <= in_size - in_start);
+ *in_pos = in_start + (size_t)(uncomp_size);
+
+ return ret;
+}
+
+
+static void
+microlzma_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_microlzma_coder *coder = coder_ptr;
+ lzma_next_end(&coder->lzma, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+microlzma_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_options_lzma *options)
+{
+ lzma_next_coder_init(&microlzma_encoder_init, next, allocator);
+
+ lzma_microlzma_coder *coder = next->coder;
+
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_microlzma_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &microlzma_encode;
+ next->end = &microlzma_encoder_end;
+
+ coder->lzma = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Encode the properties byte. Bitwise-negation of it will be the
+ // first output byte.
+ if (lzma_lzma_lclppb_encode(options, &coder->props))
+ return LZMA_OPTIONS_ERROR;
+
+ // Initialize the LZMA encoder.
+ const lzma_filter_info filters[2] = {
+ {
+ .id = LZMA_FILTER_LZMA1,
+ .init = &lzma_lzma_encoder_init,
+ .options = (void *)(options),
+ }, {
+ .init = NULL,
+ }
+ };
+
+ return lzma_next_filter_init(&coder->lzma, allocator, filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_microlzma_encoder(lzma_stream *strm, const lzma_options_lzma *options)
+{
+ lzma_next_strm_init(microlzma_encoder_init, strm, options);
+
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+
+}
diff --git a/src/liblzma/common/outqueue.c b/src/liblzma/common/outqueue.c
new file mode 100644
index 0000000..71e8648
--- /dev/null
+++ b/src/liblzma/common/outqueue.c
@@ -0,0 +1,287 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file outqueue.c
+/// \brief Output queue handling in multithreaded coding
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "outqueue.h"
+
+
+/// Get the maximum number of buffers that may be allocated based
+/// on the number of threads. For now this is twice the number of threads.
+/// It's a compromise between RAM usage and keeping the worker threads busy
+/// when buffers finish out of order.
+#define GET_BUFS_LIMIT(threads) (2 * (threads))
+
+
+extern uint64_t
+lzma_outq_memusage(uint64_t buf_size_max, uint32_t threads)
+{
+ // This is to ease integer overflow checking: We may allocate up to
+ // GET_BUFS_LIMIT(LZMA_THREADS_MAX) buffers and we need some extra
+ // memory for other data structures too (that's the /2).
+ //
+ // lzma_outq_prealloc_buf() will still accept bigger buffers than this.
+ const uint64_t limit
+ = UINT64_MAX / GET_BUFS_LIMIT(LZMA_THREADS_MAX) / 2;
+
+ if (threads > LZMA_THREADS_MAX || buf_size_max > limit)
+ return UINT64_MAX;
+
+ return GET_BUFS_LIMIT(threads)
+ * lzma_outq_outbuf_memusage(buf_size_max);
+}
+
+
+static void
+move_head_to_cache(lzma_outq *outq, const lzma_allocator *allocator)
+{
+ assert(outq->head != NULL);
+ assert(outq->tail != NULL);
+ assert(outq->bufs_in_use > 0);
+
+ lzma_outbuf *buf = outq->head;
+ outq->head = buf->next;
+ if (outq->head == NULL)
+ outq->tail = NULL;
+
+ if (outq->cache != NULL && outq->cache->allocated != buf->allocated)
+ lzma_outq_clear_cache(outq, allocator);
+
+ buf->next = outq->cache;
+ outq->cache = buf;
+
+ --outq->bufs_in_use;
+ outq->mem_in_use -= lzma_outq_outbuf_memusage(buf->allocated);
+
+ return;
+}
+
+
+static void
+free_one_cached_buffer(lzma_outq *outq, const lzma_allocator *allocator)
+{
+ assert(outq->cache != NULL);
+
+ lzma_outbuf *buf = outq->cache;
+ outq->cache = buf->next;
+
+ --outq->bufs_allocated;
+ outq->mem_allocated -= lzma_outq_outbuf_memusage(buf->allocated);
+
+ lzma_free(buf, allocator);
+ return;
+}
+
+
+extern void
+lzma_outq_clear_cache(lzma_outq *outq, const lzma_allocator *allocator)
+{
+ while (outq->cache != NULL)
+ free_one_cached_buffer(outq, allocator);
+
+ return;
+}
+
+
+extern void
+lzma_outq_clear_cache2(lzma_outq *outq, const lzma_allocator *allocator,
+ size_t keep_size)
+{
+ if (outq->cache == NULL)
+ return;
+
+ // Free all but one.
+ while (outq->cache->next != NULL)
+ free_one_cached_buffer(outq, allocator);
+
+ // Free the last one only if its size doesn't equal to keep_size.
+ if (outq->cache->allocated != keep_size)
+ free_one_cached_buffer(outq, allocator);
+
+ return;
+}
+
+
+extern lzma_ret
+lzma_outq_init(lzma_outq *outq, const lzma_allocator *allocator,
+ uint32_t threads)
+{
+ if (threads > LZMA_THREADS_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ const uint32_t bufs_limit = GET_BUFS_LIMIT(threads);
+
+ // Clear head/tail.
+ while (outq->head != NULL)
+ move_head_to_cache(outq, allocator);
+
+ // If new buf_limit is lower than the old one, we may need to free
+ // a few cached buffers.
+ while (bufs_limit < outq->bufs_allocated)
+ free_one_cached_buffer(outq, allocator);
+
+ outq->bufs_limit = bufs_limit;
+ outq->read_pos = 0;
+
+ return LZMA_OK;
+}
+
+
+extern void
+lzma_outq_end(lzma_outq *outq, const lzma_allocator *allocator)
+{
+ while (outq->head != NULL)
+ move_head_to_cache(outq, allocator);
+
+ lzma_outq_clear_cache(outq, allocator);
+ return;
+}
+
+
+extern lzma_ret
+lzma_outq_prealloc_buf(lzma_outq *outq, const lzma_allocator *allocator,
+ size_t size)
+{
+ // Caller must have checked it with lzma_outq_has_buf().
+ assert(outq->bufs_in_use < outq->bufs_limit);
+
+ // If there already is appropriately-sized buffer in the cache,
+ // we need to do nothing.
+ if (outq->cache != NULL && outq->cache->allocated == size)
+ return LZMA_OK;
+
+ if (size > SIZE_MAX - sizeof(lzma_outbuf))
+ return LZMA_MEM_ERROR;
+
+ const size_t alloc_size = lzma_outq_outbuf_memusage(size);
+
+ // The cache may have buffers but their size is wrong.
+ lzma_outq_clear_cache(outq, allocator);
+
+ outq->cache = lzma_alloc(alloc_size, allocator);
+ if (outq->cache == NULL)
+ return LZMA_MEM_ERROR;
+
+ outq->cache->next = NULL;
+ outq->cache->allocated = size;
+
+ ++outq->bufs_allocated;
+ outq->mem_allocated += alloc_size;
+
+ return LZMA_OK;
+}
+
+
+extern lzma_outbuf *
+lzma_outq_get_buf(lzma_outq *outq, void *worker)
+{
+ // Caller must have used lzma_outq_prealloc_buf() to ensure these.
+ assert(outq->bufs_in_use < outq->bufs_limit);
+ assert(outq->bufs_in_use < outq->bufs_allocated);
+ assert(outq->cache != NULL);
+
+ lzma_outbuf *buf = outq->cache;
+ outq->cache = buf->next;
+ buf->next = NULL;
+
+ if (outq->tail != NULL) {
+ assert(outq->head != NULL);
+ outq->tail->next = buf;
+ } else {
+ assert(outq->head == NULL);
+ outq->head = buf;
+ }
+
+ outq->tail = buf;
+
+ buf->worker = worker;
+ buf->finished = false;
+ buf->finish_ret = LZMA_STREAM_END;
+ buf->pos = 0;
+ buf->decoder_in_pos = 0;
+
+ buf->unpadded_size = 0;
+ buf->uncompressed_size = 0;
+
+ ++outq->bufs_in_use;
+ outq->mem_in_use += lzma_outq_outbuf_memusage(buf->allocated);
+
+ return buf;
+}
+
+
+extern bool
+lzma_outq_is_readable(const lzma_outq *outq)
+{
+ if (outq->head == NULL)
+ return false;
+
+ return outq->read_pos < outq->head->pos || outq->head->finished;
+}
+
+
+extern lzma_ret
+lzma_outq_read(lzma_outq *restrict outq,
+ const lzma_allocator *restrict allocator,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size,
+ lzma_vli *restrict unpadded_size,
+ lzma_vli *restrict uncompressed_size)
+{
+ // There must be at least one buffer from which to read.
+ if (outq->bufs_in_use == 0)
+ return LZMA_OK;
+
+ // Get the buffer.
+ lzma_outbuf *buf = outq->head;
+
+ // Copy from the buffer to output.
+ //
+ // FIXME? In threaded decoder it may be bad to do this copy while
+ // the mutex is being held.
+ lzma_bufcpy(buf->buf, &outq->read_pos, buf->pos,
+ out, out_pos, out_size);
+
+ // Return if we didn't get all the data from the buffer.
+ if (!buf->finished || outq->read_pos < buf->pos)
+ return LZMA_OK;
+
+ // The buffer was finished. Tell the caller its size information.
+ if (unpadded_size != NULL)
+ *unpadded_size = buf->unpadded_size;
+
+ if (uncompressed_size != NULL)
+ *uncompressed_size = buf->uncompressed_size;
+
+ // Remember the return value.
+ const lzma_ret finish_ret = buf->finish_ret;
+
+ // Free this buffer for further use.
+ move_head_to_cache(outq, allocator);
+ outq->read_pos = 0;
+
+ return finish_ret;
+}
+
+
+extern void
+lzma_outq_enable_partial_output(lzma_outq *outq,
+ void (*enable_partial_output)(void *worker))
+{
+ if (outq->head != NULL && !outq->head->finished
+ && outq->head->worker != NULL) {
+ enable_partial_output(outq->head->worker);
+
+ // Set it to NULL since calling it twice is pointless.
+ outq->head->worker = NULL;
+ }
+
+ return;
+}
diff --git a/src/liblzma/common/outqueue.h b/src/liblzma/common/outqueue.h
new file mode 100644
index 0000000..596911e
--- /dev/null
+++ b/src/liblzma/common/outqueue.h
@@ -0,0 +1,254 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file outqueue.h
+/// \brief Output queue handling in multithreaded coding
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+/// Output buffer for a single thread
+typedef struct lzma_outbuf_s lzma_outbuf;
+struct lzma_outbuf_s {
+ /// Pointer to the next buffer. This is used for the cached buffers.
+ /// The worker thread must not modify this.
+ lzma_outbuf *next;
+
+ /// This initialized by lzma_outq_get_buf() and
+ /// is used by lzma_outq_enable_partial_output().
+ /// The worker thread must not modify this.
+ void *worker;
+
+ /// Amount of memory allocated for buf[].
+ /// The worker thread must not modify this.
+ size_t allocated;
+
+ /// Writing position in the worker thread or, in other words, the
+ /// amount of finished data written to buf[] which can be copied out
+ ///
+ /// \note This is read by another thread and thus access
+ /// to this variable needs a mutex.
+ size_t pos;
+
+ /// Decompression: Position in the input buffer in the worker thread
+ /// that matches the output "pos" above. This is used to detect if
+ /// more output might be possible from the worker thread: if it has
+ /// consumed all its input, then more output isn't possible.
+ ///
+ /// \note This is read by another thread and thus access
+ /// to this variable needs a mutex.
+ size_t decoder_in_pos;
+
+ /// True when no more data will be written into this buffer.
+ ///
+ /// \note This is read by another thread and thus access
+ /// to this variable needs a mutex.
+ bool finished;
+
+ /// Return value for lzma_outq_read() when the last byte from
+ /// a finished buffer has been read. Defaults to LZMA_STREAM_END.
+ /// This must *not* be LZMA_OK. The idea is to allow a decoder to
+ /// pass an error code to the main thread, setting the code here
+ /// together with finished = true.
+ lzma_ret finish_ret;
+
+ /// Additional size information. lzma_outq_read() may read these
+ /// when "finished" is true.
+ lzma_vli unpadded_size;
+ lzma_vli uncompressed_size;
+
+ /// Buffer of "allocated" bytes
+ uint8_t buf[];
+};
+
+
+typedef struct {
+ /// Linked list of buffers in use. The next output byte will be
+ /// read from the head and buffers for the next thread will be
+ /// appended to the tail. tail->next is always NULL.
+ lzma_outbuf *head;
+ lzma_outbuf *tail;
+
+ /// Number of bytes read from head->buf[] in lzma_outq_read()
+ size_t read_pos;
+
+ /// Linked list of allocated buffers that aren't currently used.
+ /// This way buffers of similar size can be reused and don't
+ /// need to be reallocated every time. For simplicity, all
+ /// cached buffers in the list have the same allocated size.
+ lzma_outbuf *cache;
+
+ /// Total amount of memory allocated for buffers
+ uint64_t mem_allocated;
+
+ /// Amount of memory used by the buffers that are in use in
+ /// the head...tail linked list.
+ uint64_t mem_in_use;
+
+ /// Number of buffers in use in the head...tail list. If and only if
+ /// this is zero, the pointers head and tail above are NULL.
+ uint32_t bufs_in_use;
+
+ /// Number of buffers allocated (in use + cached)
+ uint32_t bufs_allocated;
+
+ /// Maximum allowed number of allocated buffers
+ uint32_t bufs_limit;
+} lzma_outq;
+
+
+/**
+ * \brief Calculate the memory usage of an output queue
+ *
+ * \return Approximate memory usage in bytes or UINT64_MAX on error.
+ */
+extern uint64_t lzma_outq_memusage(uint64_t buf_size_max, uint32_t threads);
+
+
+/// \brief Initialize an output queue
+///
+/// \param outq Pointer to an output queue. Before calling
+/// this function the first time, *outq should
+/// have been zeroed with memzero() so that this
+/// function knows that there are no previous
+/// allocations to free.
+/// \param allocator Pointer to allocator or NULL
+/// \param threads Number of buffers that may be in use
+/// concurrently. Note that more than this number
+/// of buffers may actually get allocated to
+/// improve performance when buffers finish
+/// out of order. The actual maximum number of
+/// allocated buffers is derived from the number
+/// of threads.
+///
+/// \return - LZMA_OK
+/// - LZMA_MEM_ERROR
+///
+extern lzma_ret lzma_outq_init(lzma_outq *outq,
+ const lzma_allocator *allocator, uint32_t threads);
+
+
+/// \brief Free the memory associated with the output queue
+extern void lzma_outq_end(lzma_outq *outq, const lzma_allocator *allocator);
+
+
+/// \brief Free all cached buffers that consume memory but aren't in use
+extern void lzma_outq_clear_cache(
+ lzma_outq *outq, const lzma_allocator *allocator);
+
+
+/// \brief Like lzma_outq_clear_cache() but might keep one buffer
+///
+/// One buffer is not freed if its size is equal to keep_size.
+/// This is useful if the caller knows that it will soon need a buffer of
+/// keep_size bytes. This way it won't be freed and immediately reallocated.
+extern void lzma_outq_clear_cache2(
+ lzma_outq *outq, const lzma_allocator *allocator,
+ size_t keep_size);
+
+
+/// \brief Preallocate a new buffer into cache
+///
+/// Splitting the buffer allocation into a separate function makes it
+/// possible to ensure that way lzma_outq_get_buf() cannot fail.
+/// If the preallocated buffer isn't actually used (for example, some
+/// other error occurs), the caller has to do nothing as the buffer will
+/// be used later or cleared from the cache when not needed.
+///
+/// \return LZMA_OK on success, LZMA_MEM_ERROR if allocation fails
+///
+extern lzma_ret lzma_outq_prealloc_buf(
+ lzma_outq *outq, const lzma_allocator *allocator, size_t size);
+
+
+/// \brief Get a new buffer
+///
+/// lzma_outq_prealloc_buf() must be used to ensure that there is a buffer
+/// available before calling lzma_outq_get_buf().
+///
+extern lzma_outbuf *lzma_outq_get_buf(lzma_outq *outq, void *worker);
+
+
+/// \brief Test if there is data ready to be read
+///
+/// Call to this function must be protected with the same mutex that
+/// is used to protect lzma_outbuf.finished.
+///
+extern bool lzma_outq_is_readable(const lzma_outq *outq);
+
+
+/// \brief Read finished data
+///
+/// \param outq Pointer to an output queue
+/// \param out Beginning of the output buffer
+/// \param out_pos The next byte will be written to
+/// out[*out_pos].
+/// \param out_size Size of the out buffer; the first byte into
+/// which no data is written to is out[out_size].
+/// \param unpadded_size Unpadded Size from the Block encoder
+/// \param uncompressed_size Uncompressed Size from the Block encoder
+///
+/// \return - LZMA: All OK. Either no data was available or the buffer
+/// being read didn't become empty yet.
+/// - LZMA_STREAM_END: The buffer being read was finished.
+/// *unpadded_size and *uncompressed_size were set if they
+/// were not NULL.
+///
+/// \note This reads lzma_outbuf.finished and .pos variables and thus
+/// calls to this function need to be protected with a mutex.
+///
+extern lzma_ret lzma_outq_read(lzma_outq *restrict outq,
+ const lzma_allocator *restrict allocator,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size, lzma_vli *restrict unpadded_size,
+ lzma_vli *restrict uncompressed_size);
+
+
+/// \brief Enable partial output from a worker thread
+///
+/// If the buffer at the head of the output queue isn't finished,
+/// this will call enable_partial_output on the worker associated with
+/// that output buffer.
+///
+/// \note This reads a lzma_outbuf.finished variable and thus
+/// calls to this function need to be protected with a mutex.
+///
+extern void lzma_outq_enable_partial_output(lzma_outq *outq,
+ void (*enable_partial_output)(void *worker));
+
+
+/// \brief Test if there is at least one buffer free
+///
+/// This must be used before getting a new buffer with lzma_outq_get_buf().
+///
+static inline bool
+lzma_outq_has_buf(const lzma_outq *outq)
+{
+ return outq->bufs_in_use < outq->bufs_limit;
+}
+
+
+/// \brief Test if the queue is completely empty
+static inline bool
+lzma_outq_is_empty(const lzma_outq *outq)
+{
+ return outq->bufs_in_use == 0;
+}
+
+
+/// \brief Get the amount of memory needed for a single lzma_outbuf
+///
+/// \note Caller must check that the argument is significantly less
+/// than SIZE_MAX to avoid an integer overflow!
+static inline uint64_t
+lzma_outq_outbuf_memusage(size_t buf_size)
+{
+ assert(buf_size <= SIZE_MAX - sizeof(lzma_outbuf));
+ return sizeof(lzma_outbuf) + buf_size;
+}
diff --git a/src/liblzma/common/stream_buffer_decoder.c b/src/liblzma/common/stream_buffer_decoder.c
new file mode 100644
index 0000000..b9745b5
--- /dev/null
+++ b/src/liblzma/common/stream_buffer_decoder.c
@@ -0,0 +1,91 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_buffer_decoder.c
+/// \brief Single-call .xz Stream decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_decoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_buffer_decode(uint64_t *memlimit, uint32_t flags,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ // Sanity checks
+ if (in_pos == NULL || (in == NULL && *in_pos != in_size)
+ || *in_pos > in_size || out_pos == NULL
+ || (out == NULL && *out_pos != out_size)
+ || *out_pos > out_size)
+ return LZMA_PROG_ERROR;
+
+ // Catch flags that are not allowed in buffer-to-buffer decoding.
+ if (flags & LZMA_TELL_ANY_CHECK)
+ return LZMA_PROG_ERROR;
+
+ // Initialize the Stream decoder.
+ // TODO: We need something to tell the decoder that it can use the
+ // output buffer as workspace, and thus save significant amount of RAM.
+ lzma_next_coder stream_decoder = LZMA_NEXT_CODER_INIT;
+ lzma_ret ret = lzma_stream_decoder_init(
+ &stream_decoder, allocator, *memlimit, flags);
+
+ if (ret == LZMA_OK) {
+ // Save the positions so that we can restore them in case
+ // an error occurs.
+ const size_t in_start = *in_pos;
+ const size_t out_start = *out_pos;
+
+ // Do the actual decoding.
+ ret = stream_decoder.code(stream_decoder.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ LZMA_FINISH);
+
+ if (ret == LZMA_STREAM_END) {
+ ret = LZMA_OK;
+ } else {
+ // Something went wrong, restore the positions.
+ *in_pos = in_start;
+ *out_pos = out_start;
+
+ if (ret == LZMA_OK) {
+ // Either the input was truncated or the
+ // output buffer was too small.
+ assert(*in_pos == in_size
+ || *out_pos == out_size);
+
+ // If all the input was consumed, then the
+ // input is truncated, even if the output
+ // buffer is also full. This is because
+ // processing the last byte of the Stream
+ // never produces output.
+ if (*in_pos == in_size)
+ ret = LZMA_DATA_ERROR;
+ else
+ ret = LZMA_BUF_ERROR;
+
+ } else if (ret == LZMA_MEMLIMIT_ERROR) {
+ // Let the caller know how much memory would
+ // have been needed.
+ uint64_t memusage;
+ (void)stream_decoder.memconfig(
+ stream_decoder.coder,
+ memlimit, &memusage, 0);
+ }
+ }
+ }
+
+ // Free the decoder memory. This needs to be done even if
+ // initialization fails, because the internal API doesn't
+ // require the initialization function to free its memory on error.
+ lzma_next_end(&stream_decoder, allocator);
+
+ return ret;
+}
diff --git a/src/liblzma/common/stream_buffer_encoder.c b/src/liblzma/common/stream_buffer_encoder.c
new file mode 100644
index 0000000..7315759
--- /dev/null
+++ b/src/liblzma/common/stream_buffer_encoder.c
@@ -0,0 +1,142 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_buffer_encoder.c
+/// \brief Single-call .xz Stream encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "index.h"
+
+
+/// Maximum size of Index that has exactly one Record.
+/// Index Indicator + Number of Records + Record + CRC32 rounded up to
+/// the next multiple of four.
+#define INDEX_BOUND ((1 + 1 + 2 * LZMA_VLI_BYTES_MAX + 4 + 3) & ~3)
+
+/// Stream Header, Stream Footer, and Index
+#define HEADERS_BOUND (2 * LZMA_STREAM_HEADER_SIZE + INDEX_BOUND)
+
+
+extern LZMA_API(size_t)
+lzma_stream_buffer_bound(size_t uncompressed_size)
+{
+ // Get the maximum possible size of a Block.
+ const size_t block_bound = lzma_block_buffer_bound(uncompressed_size);
+ if (block_bound == 0)
+ return 0;
+
+ // Catch the possible integer overflow and also prevent the size of
+ // the Stream exceeding LZMA_VLI_MAX (theoretically possible on
+ // 64-bit systems).
+ if (my_min(SIZE_MAX, LZMA_VLI_MAX) - block_bound < HEADERS_BOUND)
+ return 0;
+
+ return block_bound + HEADERS_BOUND;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_buffer_encode(lzma_filter *filters, lzma_check check,
+ const lzma_allocator *allocator,
+ const uint8_t *in, size_t in_size,
+ uint8_t *out, size_t *out_pos_ptr, size_t out_size)
+{
+ // Sanity checks
+ if (filters == NULL || (unsigned int)(check) > LZMA_CHECK_ID_MAX
+ || (in == NULL && in_size != 0) || out == NULL
+ || out_pos_ptr == NULL || *out_pos_ptr > out_size)
+ return LZMA_PROG_ERROR;
+
+ if (!lzma_check_is_supported(check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ // Note for the paranoids: Index encoder prevents the Stream from
+ // getting too big and still being accepted with LZMA_OK, and Block
+ // encoder catches if the input is too big. So we don't need to
+ // separately check if the buffers are too big.
+
+ // Use a local copy. We update *out_pos_ptr only if everything
+ // succeeds.
+ size_t out_pos = *out_pos_ptr;
+
+ // Check that there's enough space for both Stream Header and
+ // Stream Footer.
+ if (out_size - out_pos <= 2 * LZMA_STREAM_HEADER_SIZE)
+ return LZMA_BUF_ERROR;
+
+ // Reserve space for Stream Footer so we don't need to check for
+ // available space again before encoding Stream Footer.
+ out_size -= LZMA_STREAM_HEADER_SIZE;
+
+ // Encode the Stream Header.
+ lzma_stream_flags stream_flags = {
+ .version = 0,
+ .check = check,
+ };
+
+ if (lzma_stream_header_encode(&stream_flags, out + out_pos)
+ != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ out_pos += LZMA_STREAM_HEADER_SIZE;
+
+ // Encode a Block but only if there is at least one byte of input.
+ lzma_block block = {
+ .version = 0,
+ .check = check,
+ .filters = filters,
+ };
+
+ if (in_size > 0)
+ return_if_error(lzma_block_buffer_encode(&block, allocator,
+ in, in_size, out, &out_pos, out_size));
+
+ // Index
+ {
+ // Create an Index. It will have one Record if there was
+ // at least one byte of input to encode. Otherwise the
+ // Index will be empty.
+ lzma_index *i = lzma_index_init(allocator);
+ if (i == NULL)
+ return LZMA_MEM_ERROR;
+
+ lzma_ret ret = LZMA_OK;
+
+ if (in_size > 0)
+ ret = lzma_index_append(i, allocator,
+ lzma_block_unpadded_size(&block),
+ block.uncompressed_size);
+
+ // If adding the Record was successful, encode the Index
+ // and get its size which will be stored into Stream Footer.
+ if (ret == LZMA_OK) {
+ ret = lzma_index_buffer_encode(
+ i, out, &out_pos, out_size);
+
+ stream_flags.backward_size = lzma_index_size(i);
+ }
+
+ lzma_index_end(i, allocator);
+
+ if (ret != LZMA_OK)
+ return ret;
+ }
+
+ // Stream Footer. We have already reserved space for this.
+ if (lzma_stream_footer_encode(&stream_flags, out + out_pos)
+ != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ out_pos += LZMA_STREAM_HEADER_SIZE;
+
+ // Everything went fine, make the new output position available
+ // to the application.
+ *out_pos_ptr = out_pos;
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_decoder.c b/src/liblzma/common/stream_decoder.c
new file mode 100644
index 0000000..6428381
--- /dev/null
+++ b/src/liblzma/common/stream_decoder.c
@@ -0,0 +1,474 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_decoder.c
+/// \brief Decodes .xz Streams
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_decoder.h"
+#include "block_decoder.h"
+#include "index.h"
+
+
+typedef struct {
+ enum {
+ SEQ_STREAM_HEADER,
+ SEQ_BLOCK_HEADER,
+ SEQ_BLOCK_INIT,
+ SEQ_BLOCK_RUN,
+ SEQ_INDEX,
+ SEQ_STREAM_FOOTER,
+ SEQ_STREAM_PADDING,
+ } sequence;
+
+ /// Block decoder
+ lzma_next_coder block_decoder;
+
+ /// Block options decoded by the Block Header decoder and used by
+ /// the Block decoder.
+ lzma_block block_options;
+
+ /// Stream Flags from Stream Header
+ lzma_stream_flags stream_flags;
+
+ /// Index is hashed so that it can be compared to the sizes of Blocks
+ /// with O(1) memory usage.
+ lzma_index_hash *index_hash;
+
+ /// Memory usage limit
+ uint64_t memlimit;
+
+ /// Amount of memory actually needed (only an estimate)
+ uint64_t memusage;
+
+ /// If true, LZMA_NO_CHECK is returned if the Stream has
+ /// no integrity check.
+ bool tell_no_check;
+
+ /// If true, LZMA_UNSUPPORTED_CHECK is returned if the Stream has
+ /// an integrity check that isn't supported by this liblzma build.
+ bool tell_unsupported_check;
+
+ /// If true, LZMA_GET_CHECK is returned after decoding Stream Header.
+ bool tell_any_check;
+
+ /// If true, we will tell the Block decoder to skip calculating
+ /// and verifying the integrity check.
+ bool ignore_check;
+
+ /// If true, we will decode concatenated Streams that possibly have
+ /// Stream Padding between or after them. LZMA_STREAM_END is returned
+ /// once the application isn't giving us any new input (LZMA_FINISH),
+ /// and we aren't in the middle of a Stream, and possible
+ /// Stream Padding is a multiple of four bytes.
+ bool concatenated;
+
+ /// When decoding concatenated Streams, this is true as long as we
+ /// are decoding the first Stream. This is needed to avoid misleading
+ /// LZMA_FORMAT_ERROR in case the later Streams don't have valid magic
+ /// bytes.
+ bool first_stream;
+
+ /// Write position in buffer[] and position in Stream Padding
+ size_t pos;
+
+ /// Buffer to hold Stream Header, Block Header, and Stream Footer.
+ /// Block Header has biggest maximum size.
+ uint8_t buffer[LZMA_BLOCK_HEADER_SIZE_MAX];
+} lzma_stream_coder;
+
+
+static lzma_ret
+stream_decoder_reset(lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ // Initialize the Index hash used to verify the Index.
+ coder->index_hash = lzma_index_hash_init(coder->index_hash, allocator);
+ if (coder->index_hash == NULL)
+ return LZMA_MEM_ERROR;
+
+ // Reset the rest of the variables.
+ coder->sequence = SEQ_STREAM_HEADER;
+ coder->pos = 0;
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+stream_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ // When decoding the actual Block, it may be able to produce more
+ // output even if we don't give it any new input.
+ while (true)
+ switch (coder->sequence) {
+ case SEQ_STREAM_HEADER: {
+ // Copy the Stream Header to the internal buffer.
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ LZMA_STREAM_HEADER_SIZE);
+
+ // Return if we didn't get the whole Stream Header yet.
+ if (coder->pos < LZMA_STREAM_HEADER_SIZE)
+ return LZMA_OK;
+
+ coder->pos = 0;
+
+ // Decode the Stream Header.
+ const lzma_ret ret = lzma_stream_header_decode(
+ &coder->stream_flags, coder->buffer);
+ if (ret != LZMA_OK)
+ return ret == LZMA_FORMAT_ERROR && !coder->first_stream
+ ? LZMA_DATA_ERROR : ret;
+
+ // If we are decoding concatenated Streams, and the later
+ // Streams have invalid Header Magic Bytes, we give
+ // LZMA_DATA_ERROR instead of LZMA_FORMAT_ERROR.
+ coder->first_stream = false;
+
+ // Copy the type of the Check so that Block Header and Block
+ // decoders see it.
+ coder->block_options.check = coder->stream_flags.check;
+
+ // Even if we return LZMA_*_CHECK below, we want
+ // to continue from Block Header decoding.
+ coder->sequence = SEQ_BLOCK_HEADER;
+
+ // Detect if there's no integrity check or if it is
+ // unsupported if those were requested by the application.
+ if (coder->tell_no_check && coder->stream_flags.check
+ == LZMA_CHECK_NONE)
+ return LZMA_NO_CHECK;
+
+ if (coder->tell_unsupported_check
+ && !lzma_check_is_supported(
+ coder->stream_flags.check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ if (coder->tell_any_check)
+ return LZMA_GET_CHECK;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_HEADER: {
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ if (coder->pos == 0) {
+ // Detect if it's Index.
+ if (in[*in_pos] == INDEX_INDICATOR) {
+ coder->sequence = SEQ_INDEX;
+ break;
+ }
+
+ // Calculate the size of the Block Header. Note that
+ // Block Header decoder wants to see this byte too
+ // so don't advance *in_pos.
+ coder->block_options.header_size
+ = lzma_block_header_size_decode(
+ in[*in_pos]);
+ }
+
+ // Copy the Block Header to the internal buffer.
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ coder->block_options.header_size);
+
+ // Return if we didn't get the whole Block Header yet.
+ if (coder->pos < coder->block_options.header_size)
+ return LZMA_OK;
+
+ coder->pos = 0;
+ coder->sequence = SEQ_BLOCK_INIT;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_INIT: {
+ // Checking memusage and doing the initialization needs
+ // its own sequence point because we need to be able to
+ // retry if we return LZMA_MEMLIMIT_ERROR.
+
+ // Version 1 is needed to support the .ignore_check option.
+ coder->block_options.version = 1;
+
+ // Set up a buffer to hold the filter chain. Block Header
+ // decoder will initialize all members of this array so
+ // we don't need to do it here.
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+ coder->block_options.filters = filters;
+
+ // Decode the Block Header.
+ return_if_error(lzma_block_header_decode(&coder->block_options,
+ allocator, coder->buffer));
+
+ // If LZMA_IGNORE_CHECK was used, this flag needs to be set.
+ // It has to be set after lzma_block_header_decode() because
+ // it always resets this to false.
+ coder->block_options.ignore_check = coder->ignore_check;
+
+ // Check the memory usage limit.
+ const uint64_t memusage = lzma_raw_decoder_memusage(filters);
+ lzma_ret ret;
+
+ if (memusage == UINT64_MAX) {
+ // One or more unknown Filter IDs.
+ ret = LZMA_OPTIONS_ERROR;
+ } else {
+ // Now we can set coder->memusage since we know that
+ // the filter chain is valid. We don't want
+ // lzma_memusage() to return UINT64_MAX in case of
+ // invalid filter chain.
+ coder->memusage = memusage;
+
+ if (memusage > coder->memlimit) {
+ // The chain would need too much memory.
+ ret = LZMA_MEMLIMIT_ERROR;
+ } else {
+ // Memory usage is OK.
+ // Initialize the Block decoder.
+ ret = lzma_block_decoder_init(
+ &coder->block_decoder,
+ allocator,
+ &coder->block_options);
+ }
+ }
+
+ // Free the allocated filter options since they are needed
+ // only to initialize the Block decoder.
+ lzma_filters_free(filters, allocator);
+ coder->block_options.filters = NULL;
+
+ // Check if memory usage calculation and Block decoder
+ // initialization succeeded.
+ if (ret != LZMA_OK)
+ return ret;
+
+ coder->sequence = SEQ_BLOCK_RUN;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_RUN: {
+ const lzma_ret ret = coder->block_decoder.code(
+ coder->block_decoder.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ action);
+
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // Block decoded successfully. Add the new size pair to
+ // the Index hash.
+ return_if_error(lzma_index_hash_append(coder->index_hash,
+ lzma_block_unpadded_size(
+ &coder->block_options),
+ coder->block_options.uncompressed_size));
+
+ coder->sequence = SEQ_BLOCK_HEADER;
+ break;
+ }
+
+ case SEQ_INDEX: {
+ // If we don't have any input, don't call
+ // lzma_index_hash_decode() since it would return
+ // LZMA_BUF_ERROR, which we must not do here.
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ // Decode the Index and compare it to the hash calculated
+ // from the sizes of the Blocks (if any).
+ const lzma_ret ret = lzma_index_hash_decode(coder->index_hash,
+ in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ coder->sequence = SEQ_STREAM_FOOTER;
+ }
+
+ // Fall through
+
+ case SEQ_STREAM_FOOTER: {
+ // Copy the Stream Footer to the internal buffer.
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ LZMA_STREAM_HEADER_SIZE);
+
+ // Return if we didn't get the whole Stream Footer yet.
+ if (coder->pos < LZMA_STREAM_HEADER_SIZE)
+ return LZMA_OK;
+
+ coder->pos = 0;
+
+ // Decode the Stream Footer. The decoder gives
+ // LZMA_FORMAT_ERROR if the magic bytes don't match,
+ // so convert that return code to LZMA_DATA_ERROR.
+ lzma_stream_flags footer_flags;
+ const lzma_ret ret = lzma_stream_footer_decode(
+ &footer_flags, coder->buffer);
+ if (ret != LZMA_OK)
+ return ret == LZMA_FORMAT_ERROR
+ ? LZMA_DATA_ERROR : ret;
+
+ // Check that Index Size stored in the Stream Footer matches
+ // the real size of the Index field.
+ if (lzma_index_hash_size(coder->index_hash)
+ != footer_flags.backward_size)
+ return LZMA_DATA_ERROR;
+
+ // Compare that the Stream Flags fields are identical in
+ // both Stream Header and Stream Footer.
+ return_if_error(lzma_stream_flags_compare(
+ &coder->stream_flags, &footer_flags));
+
+ if (!coder->concatenated)
+ return LZMA_STREAM_END;
+
+ coder->sequence = SEQ_STREAM_PADDING;
+ }
+
+ // Fall through
+
+ case SEQ_STREAM_PADDING:
+ assert(coder->concatenated);
+
+ // Skip over possible Stream Padding.
+ while (true) {
+ if (*in_pos >= in_size) {
+ // Unless LZMA_FINISH was used, we cannot
+ // know if there's more input coming later.
+ if (action != LZMA_FINISH)
+ return LZMA_OK;
+
+ // Stream Padding must be a multiple of
+ // four bytes.
+ return coder->pos == 0
+ ? LZMA_STREAM_END
+ : LZMA_DATA_ERROR;
+ }
+
+ // If the byte is not zero, it probably indicates
+ // beginning of a new Stream (or the file is corrupt).
+ if (in[*in_pos] != 0x00)
+ break;
+
+ ++*in_pos;
+ coder->pos = (coder->pos + 1) & 3;
+ }
+
+ // Stream Padding must be a multiple of four bytes (empty
+ // Stream Padding is OK).
+ if (coder->pos != 0) {
+ ++*in_pos;
+ return LZMA_DATA_ERROR;
+ }
+
+ // Prepare to decode the next Stream.
+ return_if_error(stream_decoder_reset(coder, allocator));
+ break;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ // Never reached
+}
+
+
+static void
+stream_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_stream_coder *coder = coder_ptr;
+ lzma_next_end(&coder->block_decoder, allocator);
+ lzma_index_hash_end(coder->index_hash, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_check
+stream_decoder_get_check(const void *coder_ptr)
+{
+ const lzma_stream_coder *coder = coder_ptr;
+ return coder->stream_flags.check;
+}
+
+
+static lzma_ret
+stream_decoder_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ *memusage = coder->memusage;
+ *old_memlimit = coder->memlimit;
+
+ if (new_memlimit != 0) {
+ if (new_memlimit < coder->memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ coder->memlimit = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_stream_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_coder_init(&lzma_stream_decoder_init, next, allocator);
+
+ if (flags & ~LZMA_SUPPORTED_FLAGS)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_stream_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &stream_decode;
+ next->end = &stream_decoder_end;
+ next->get_check = &stream_decoder_get_check;
+ next->memconfig = &stream_decoder_memconfig;
+
+ coder->block_decoder = LZMA_NEXT_CODER_INIT;
+ coder->index_hash = NULL;
+ }
+
+ coder->memlimit = my_max(1, memlimit);
+ coder->memusage = LZMA_MEMUSAGE_BASE;
+ coder->tell_no_check = (flags & LZMA_TELL_NO_CHECK) != 0;
+ coder->tell_unsupported_check
+ = (flags & LZMA_TELL_UNSUPPORTED_CHECK) != 0;
+ coder->tell_any_check = (flags & LZMA_TELL_ANY_CHECK) != 0;
+ coder->ignore_check = (flags & LZMA_IGNORE_CHECK) != 0;
+ coder->concatenated = (flags & LZMA_CONCATENATED) != 0;
+ coder->first_stream = true;
+
+ return stream_decoder_reset(coder, allocator);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_decoder(lzma_stream *strm, uint64_t memlimit, uint32_t flags)
+{
+ lzma_next_strm_init(lzma_stream_decoder_init, strm, memlimit, flags);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_decoder.h b/src/liblzma/common/stream_decoder.h
new file mode 100644
index 0000000..c13c6ba
--- /dev/null
+++ b/src/liblzma/common/stream_decoder.h
@@ -0,0 +1,22 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_decoder.h
+/// \brief Decodes .xz Streams
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_STREAM_DECODER_H
+#define LZMA_STREAM_DECODER_H
+
+#include "common.h"
+
+extern lzma_ret lzma_stream_decoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ uint64_t memlimit, uint32_t flags);
+
+#endif
diff --git a/src/liblzma/common/stream_decoder_mt.c b/src/liblzma/common/stream_decoder_mt.c
new file mode 100644
index 0000000..76212b4
--- /dev/null
+++ b/src/liblzma/common/stream_decoder_mt.c
@@ -0,0 +1,2018 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_decoder_mt.c
+/// \brief Multithreaded .xz Stream decoder
+//
+// Authors: Sebastian Andrzej Siewior
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+#include "block_decoder.h"
+#include "stream_decoder.h"
+#include "index.h"
+#include "outqueue.h"
+
+
+typedef enum {
+ /// Waiting for work.
+ /// Main thread may change this to THR_RUN or THR_EXIT.
+ THR_IDLE,
+
+ /// Decoding is in progress.
+ /// Main thread may change this to THR_STOP or THR_EXIT.
+ /// The worker thread may change this to THR_IDLE.
+ THR_RUN,
+
+ /// The main thread wants the thread to stop whatever it was doing
+ /// but not exit. Main thread may change this to THR_EXIT.
+ /// The worker thread may change this to THR_IDLE.
+ THR_STOP,
+
+ /// The main thread wants the thread to exit.
+ THR_EXIT,
+
+} worker_state;
+
+
+typedef enum {
+ /// Partial updates (storing of worker thread progress
+ /// to lzma_outbuf) are disabled.
+ PARTIAL_DISABLED,
+
+ /// Main thread requests partial updates to be enabled but
+ /// no partial update has been done by the worker thread yet.
+ ///
+ /// Changing from PARTIAL_DISABLED to PARTIAL_START requires
+ /// use of the worker-thread mutex. Other transitions don't
+ /// need a mutex.
+ PARTIAL_START,
+
+ /// Partial updates are enabled and the worker thread has done
+ /// at least one partial update.
+ PARTIAL_ENABLED,
+
+} partial_update_mode;
+
+
+struct worker_thread {
+ /// Worker state is protected with our mutex.
+ worker_state state;
+
+ /// Input buffer that will contain the whole Block except Block Header.
+ uint8_t *in;
+
+ /// Amount of memory allocated for "in"
+ size_t in_size;
+
+ /// Number of bytes written to "in" by the main thread
+ size_t in_filled;
+
+ /// Number of bytes consumed from "in" by the worker thread.
+ size_t in_pos;
+
+ /// Amount of uncompressed data that has been decoded. This local
+ /// copy is needed because updating outbuf->pos requires locking
+ /// the main mutex (coder->mutex).
+ size_t out_pos;
+
+ /// Pointer to the main structure is needed to (1) lock the main
+ /// mutex (coder->mutex) when updating outbuf->pos and (2) when
+ /// putting this thread back to the stack of free threads.
+ struct lzma_stream_coder *coder;
+
+ /// The allocator is set by the main thread. Since a copy of the
+ /// pointer is kept here, the application must not change the
+ /// allocator before calling lzma_end().
+ const lzma_allocator *allocator;
+
+ /// Output queue buffer to which the uncompressed data is written.
+ lzma_outbuf *outbuf;
+
+ /// Amount of compressed data that has already been decompressed.
+ /// This is updated from in_pos when our mutex is locked.
+ /// This is size_t, not uint64_t, because per-thread progress
+ /// is limited to sizes of allocated buffers.
+ size_t progress_in;
+
+ /// Like progress_in but for uncompressed data.
+ size_t progress_out;
+
+ /// Updating outbuf->pos requires locking the main mutex
+ /// (coder->mutex). Since the main thread will only read output
+ /// from the oldest outbuf in the queue, only the worker thread
+ /// that is associated with the oldest outbuf needs to update its
+ /// outbuf->pos. This avoids useless mutex contention that would
+ /// happen if all worker threads were frequently locking the main
+ /// mutex to update their outbuf->pos.
+ ///
+ /// Only when partial_update is something else than PARTIAL_DISABLED,
+ /// this worker thread will update outbuf->pos after each call to
+ /// the Block decoder.
+ partial_update_mode partial_update;
+
+ /// Block decoder
+ lzma_next_coder block_decoder;
+
+ /// Thread-specific Block options are needed because the Block
+ /// decoder modifies the struct given to it at initialization.
+ lzma_block block_options;
+
+ /// Filter chain memory usage
+ uint64_t mem_filters;
+
+ /// Next structure in the stack of free worker threads.
+ struct worker_thread *next;
+
+ mythread_mutex mutex;
+ mythread_cond cond;
+
+ /// The ID of this thread is used to join the thread
+ /// when it's not needed anymore.
+ mythread thread_id;
+};
+
+
+struct lzma_stream_coder {
+ enum {
+ SEQ_STREAM_HEADER,
+ SEQ_BLOCK_HEADER,
+ SEQ_BLOCK_INIT,
+ SEQ_BLOCK_THR_INIT,
+ SEQ_BLOCK_THR_RUN,
+ SEQ_BLOCK_DIRECT_INIT,
+ SEQ_BLOCK_DIRECT_RUN,
+ SEQ_INDEX_WAIT_OUTPUT,
+ SEQ_INDEX_DECODE,
+ SEQ_STREAM_FOOTER,
+ SEQ_STREAM_PADDING,
+ SEQ_ERROR,
+ } sequence;
+
+ /// Block decoder
+ lzma_next_coder block_decoder;
+
+ /// Every Block Header will be decoded into this structure.
+ /// This is also used to initialize a Block decoder when in
+ /// direct mode. In threaded mode, a thread-specific copy will
+ /// be made for decoder initialization because the Block decoder
+ /// will modify the structure given to it.
+ lzma_block block_options;
+
+ /// Buffer to hold a filter chain for Block Header decoding and
+ /// initialization. These are freed after successful Block decoder
+ /// initialization or at stream_decoder_mt_end(). The thread-specific
+ /// copy of block_options won't hold a pointer to filters[] after
+ /// initialization.
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+ /// Stream Flags from Stream Header
+ lzma_stream_flags stream_flags;
+
+ /// Index is hashed so that it can be compared to the sizes of Blocks
+ /// with O(1) memory usage.
+ lzma_index_hash *index_hash;
+
+
+ /// Maximum wait time if cannot use all the input and cannot
+ /// fill the output buffer. This is in milliseconds.
+ uint32_t timeout;
+
+
+ /// Error code from a worker thread.
+ ///
+ /// \note Use mutex.
+ lzma_ret thread_error;
+
+ /// Error code to return after pending output has been copied out. If
+ /// set in read_output_and_wait(), this is a mirror of thread_error.
+ /// If set in stream_decode_mt() then it's, for example, error that
+ /// occurred when decoding Block Header.
+ lzma_ret pending_error;
+
+ /// Number of threads that will be created at maximum.
+ uint32_t threads_max;
+
+ /// Number of thread structures that have been initialized from
+ /// "threads", and thus the number of worker threads actually
+ /// created so far.
+ uint32_t threads_initialized;
+
+ /// Array of allocated thread-specific structures. When no threads
+ /// are in use (direct mode) this is NULL. In threaded mode this
+ /// points to an array of threads_max number of worker_thread structs.
+ struct worker_thread *threads;
+
+ /// Stack of free threads. When a thread finishes, it puts itself
+ /// back into this stack. This starts as empty because threads
+ /// are created only when actually needed.
+ ///
+ /// \note Use mutex.
+ struct worker_thread *threads_free;
+
+ /// The most recent worker thread to which the main thread writes
+ /// the new input from the application.
+ struct worker_thread *thr;
+
+ /// Output buffer queue for decompressed data from the worker threads
+ ///
+ /// \note Use mutex with operations that need it.
+ lzma_outq outq;
+
+ mythread_mutex mutex;
+ mythread_cond cond;
+
+
+ /// Memory usage that will not be exceeded in multi-threaded mode.
+ /// Single-threaded mode can exceed this even by a large amount.
+ uint64_t memlimit_threading;
+
+ /// Memory usage limit that should never be exceeded.
+ /// LZMA_MEMLIMIT_ERROR will be returned if decoding isn't possible
+ /// even in single-threaded mode without exceeding this limit.
+ uint64_t memlimit_stop;
+
+ /// Amount of memory in use by the direct mode decoder
+ /// (coder->block_decoder). In threaded mode this is 0.
+ uint64_t mem_direct_mode;
+
+ /// Amount of memory needed by the running worker threads.
+ /// This doesn't include the memory needed by the output buffer.
+ ///
+ /// \note Use mutex.
+ uint64_t mem_in_use;
+
+ /// Amount of memory used by the idle (cached) threads.
+ ///
+ /// \note Use mutex.
+ uint64_t mem_cached;
+
+
+ /// Amount of memory needed for the filter chain of the next Block.
+ uint64_t mem_next_filters;
+
+ /// Amount of memory needed for the thread-specific input buffer
+ /// for the next Block.
+ uint64_t mem_next_in;
+
+ /// Amount of memory actually needed to decode the next Block
+ /// in threaded mode. This is
+ /// mem_next_filters + mem_next_in + memory needed for lzma_outbuf.
+ uint64_t mem_next_block;
+
+
+ /// Amount of compressed data in Stream Header + Blocks that have
+ /// already been finished.
+ ///
+ /// \note Use mutex.
+ uint64_t progress_in;
+
+ /// Amount of uncompressed data in Blocks that have already
+ /// been finished.
+ ///
+ /// \note Use mutex.
+ uint64_t progress_out;
+
+
+ /// If true, LZMA_NO_CHECK is returned if the Stream has
+ /// no integrity check.
+ bool tell_no_check;
+
+ /// If true, LZMA_UNSUPPORTED_CHECK is returned if the Stream has
+ /// an integrity check that isn't supported by this liblzma build.
+ bool tell_unsupported_check;
+
+ /// If true, LZMA_GET_CHECK is returned after decoding Stream Header.
+ bool tell_any_check;
+
+ /// If true, we will tell the Block decoder to skip calculating
+ /// and verifying the integrity check.
+ bool ignore_check;
+
+ /// If true, we will decode concatenated Streams that possibly have
+ /// Stream Padding between or after them. LZMA_STREAM_END is returned
+ /// once the application isn't giving us any new input (LZMA_FINISH),
+ /// and we aren't in the middle of a Stream, and possible
+ /// Stream Padding is a multiple of four bytes.
+ bool concatenated;
+
+ /// If true, we will return any errors immediately instead of first
+ /// producing all output before the location of the error.
+ bool fail_fast;
+
+
+ /// When decoding concatenated Streams, this is true as long as we
+ /// are decoding the first Stream. This is needed to avoid misleading
+ /// LZMA_FORMAT_ERROR in case the later Streams don't have valid magic
+ /// bytes.
+ bool first_stream;
+
+ /// This is used to track if the previous call to stream_decode_mt()
+ /// had output space (*out_pos < out_size) and managed to fill the
+ /// output buffer (*out_pos == out_size). This may be set to true
+ /// in read_output_and_wait(). This is read and then reset to false
+ /// at the beginning of stream_decode_mt().
+ ///
+ /// This is needed to support applications that call lzma_code() in
+ /// such a way that more input is provided only when lzma_code()
+ /// didn't fill the output buffer completely. Basically, this makes
+ /// it easier to convert such applications from single-threaded
+ /// decoder to multi-threaded decoder.
+ bool out_was_filled;
+
+ /// Write position in buffer[] and position in Stream Padding
+ size_t pos;
+
+ /// Buffer to hold Stream Header, Block Header, and Stream Footer.
+ /// Block Header has biggest maximum size.
+ uint8_t buffer[LZMA_BLOCK_HEADER_SIZE_MAX];
+};
+
+
+/// Enables updating of outbuf->pos. This is a callback function that is
+/// used with lzma_outq_enable_partial_output().
+static void
+worker_enable_partial_update(void *thr_ptr)
+{
+ struct worker_thread *thr = thr_ptr;
+
+ mythread_sync(thr->mutex) {
+ thr->partial_update = PARTIAL_START;
+ mythread_cond_signal(&thr->cond);
+ }
+}
+
+
+/// Things do to at THR_STOP or when finishing a Block.
+/// This is called with thr->mutex locked.
+static void
+worker_stop(struct worker_thread *thr)
+{
+ // Update memory usage counters.
+ thr->coder->mem_in_use -= thr->in_size;
+ thr->in_size = 0; // thr->in was freed above.
+
+ thr->coder->mem_in_use -= thr->mem_filters;
+ thr->coder->mem_cached += thr->mem_filters;
+
+ // Put this thread to the stack of free threads.
+ thr->next = thr->coder->threads_free;
+ thr->coder->threads_free = thr;
+
+ mythread_cond_signal(&thr->coder->cond);
+ return;
+}
+
+
+static MYTHREAD_RET_TYPE
+worker_decoder(void *thr_ptr)
+{
+ struct worker_thread *thr = thr_ptr;
+ size_t in_filled;
+ partial_update_mode partial_update;
+ lzma_ret ret;
+
+next_loop_lock:
+
+ mythread_mutex_lock(&thr->mutex);
+next_loop_unlocked:
+
+ if (thr->state == THR_IDLE) {
+ mythread_cond_wait(&thr->cond, &thr->mutex);
+ goto next_loop_unlocked;
+ }
+
+ if (thr->state == THR_EXIT) {
+ mythread_mutex_unlock(&thr->mutex);
+
+ lzma_free(thr->in, thr->allocator);
+ lzma_next_end(&thr->block_decoder, thr->allocator);
+
+ mythread_mutex_destroy(&thr->mutex);
+ mythread_cond_destroy(&thr->cond);
+
+ return MYTHREAD_RET_VALUE;
+ }
+
+ if (thr->state == THR_STOP) {
+ thr->state = THR_IDLE;
+ mythread_mutex_unlock(&thr->mutex);
+
+ mythread_sync(thr->coder->mutex) {
+ worker_stop(thr);
+ }
+
+ goto next_loop_lock;
+ }
+
+ assert(thr->state == THR_RUN);
+
+ // Update progress info for get_progress().
+ thr->progress_in = thr->in_pos;
+ thr->progress_out = thr->out_pos;
+
+ // If we don't have any new input, wait for a signal from the main
+ // thread except if partial output has just been enabled. In that
+ // case we will do one normal run so that the partial output info
+ // gets passed to the main thread. The call to block_decoder.code()
+ // is useless but harmless as it can occur only once per Block.
+ in_filled = thr->in_filled;
+ partial_update = thr->partial_update;
+
+ if (in_filled == thr->in_pos && partial_update != PARTIAL_START) {
+ mythread_cond_wait(&thr->cond, &thr->mutex);
+ goto next_loop_unlocked;
+ }
+
+ mythread_mutex_unlock(&thr->mutex);
+
+ // Pass the input in small chunks to the Block decoder.
+ // This way we react reasonably fast if we are told to stop/exit,
+ // and (when partial update is enabled) we tell about our progress
+ // to the main thread frequently enough.
+ const size_t chunk_size = 16384;
+ if ((in_filled - thr->in_pos) > chunk_size)
+ in_filled = thr->in_pos + chunk_size;
+
+ ret = thr->block_decoder.code(
+ thr->block_decoder.coder, thr->allocator,
+ thr->in, &thr->in_pos, in_filled,
+ thr->outbuf->buf, &thr->out_pos,
+ thr->outbuf->allocated, LZMA_RUN);
+
+ if (ret == LZMA_OK) {
+ if (partial_update != PARTIAL_DISABLED) {
+ // The main thread uses thr->mutex to change from
+ // PARTIAL_DISABLED to PARTIAL_START. The main thread
+ // doesn't care about this variable after that so we
+ // can safely change it here to PARTIAL_ENABLED
+ // without a mutex.
+ thr->partial_update = PARTIAL_ENABLED;
+
+ // The main thread is reading decompressed data
+ // from thr->outbuf. Tell the main thread about
+ // our progress.
+ //
+ // NOTE: It's possible that we consumed input without
+ // producing any new output so it's possible that
+ // only in_pos has changed. In case of PARTIAL_START
+ // it is possible that neither in_pos nor out_pos has
+ // changed.
+ mythread_sync(thr->coder->mutex) {
+ thr->outbuf->pos = thr->out_pos;
+ thr->outbuf->decoder_in_pos = thr->in_pos;
+ mythread_cond_signal(&thr->coder->cond);
+ }
+ }
+
+ goto next_loop_lock;
+ }
+
+ // Either we finished successfully (LZMA_STREAM_END) or an error
+ // occurred. Both cases are handled almost identically. The error
+ // case requires updating thr->coder->thread_error.
+ //
+ // The sizes are in the Block Header and the Block decoder
+ // checks that they match, thus we know these:
+ assert(ret != LZMA_STREAM_END || thr->in_pos == thr->in_size);
+ assert(ret != LZMA_STREAM_END
+ || thr->out_pos == thr->block_options.uncompressed_size);
+
+ // Free the input buffer. Don't update in_size as we need
+ // it later to update thr->coder->mem_in_use.
+ lzma_free(thr->in, thr->allocator);
+ thr->in = NULL;
+
+ mythread_sync(thr->mutex) {
+ if (thr->state != THR_EXIT)
+ thr->state = THR_IDLE;
+ }
+
+ mythread_sync(thr->coder->mutex) {
+ // Move our progress info to the main thread.
+ thr->coder->progress_in += thr->in_pos;
+ thr->coder->progress_out += thr->out_pos;
+ thr->progress_in = 0;
+ thr->progress_out = 0;
+
+ // Mark the outbuf as finished.
+ thr->outbuf->pos = thr->out_pos;
+ thr->outbuf->decoder_in_pos = thr->in_pos;
+ thr->outbuf->finished = true;
+ thr->outbuf->finish_ret = ret;
+ thr->outbuf = NULL;
+
+ // If an error occurred, tell it to the main thread.
+ if (ret != LZMA_STREAM_END
+ && thr->coder->thread_error == LZMA_OK)
+ thr->coder->thread_error = ret;
+
+ worker_stop(thr);
+ }
+
+ goto next_loop_lock;
+}
+
+
+/// Tells the worker threads to exit and waits for them to terminate.
+static void
+threads_end(struct lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ coder->threads[i].state = THR_EXIT;
+ mythread_cond_signal(&coder->threads[i].cond);
+ }
+ }
+
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i)
+ mythread_join(coder->threads[i].thread_id);
+
+ lzma_free(coder->threads, allocator);
+ coder->threads_initialized = 0;
+ coder->threads = NULL;
+ coder->threads_free = NULL;
+
+ // The threads don't update these when they exit. Do it here.
+ coder->mem_in_use = 0;
+ coder->mem_cached = 0;
+
+ return;
+}
+
+
+static void
+threads_stop(struct lzma_stream_coder *coder)
+{
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ // The state must be changed conditionally because
+ // THR_IDLE -> THR_STOP is not a valid state change.
+ if (coder->threads[i].state != THR_IDLE) {
+ coder->threads[i].state = THR_STOP;
+ mythread_cond_signal(&coder->threads[i].cond);
+ }
+ }
+ }
+
+ return;
+}
+
+
+/// Initialize a new worker_thread structure and create a new thread.
+static lzma_ret
+initialize_new_thread(struct lzma_stream_coder *coder,
+ const lzma_allocator *allocator)
+{
+ // Allocate the coder->threads array if needed. It's done here instead
+ // of when initializing the decoder because we don't need this if we
+ // use the direct mode (we may even free coder->threads in the middle
+ // of the file if we switch from threaded to direct mode).
+ if (coder->threads == NULL) {
+ coder->threads = lzma_alloc(
+ coder->threads_max * sizeof(struct worker_thread),
+ allocator);
+
+ if (coder->threads == NULL)
+ return LZMA_MEM_ERROR;
+ }
+
+ // Pick a free structure.
+ assert(coder->threads_initialized < coder->threads_max);
+ struct worker_thread *thr
+ = &coder->threads[coder->threads_initialized];
+
+ if (mythread_mutex_init(&thr->mutex))
+ goto error_mutex;
+
+ if (mythread_cond_init(&thr->cond))
+ goto error_cond;
+
+ thr->state = THR_IDLE;
+ thr->in = NULL;
+ thr->in_size = 0;
+ thr->allocator = allocator;
+ thr->coder = coder;
+ thr->outbuf = NULL;
+ thr->block_decoder = LZMA_NEXT_CODER_INIT;
+ thr->mem_filters = 0;
+
+ if (mythread_create(&thr->thread_id, worker_decoder, thr))
+ goto error_thread;
+
+ ++coder->threads_initialized;
+ coder->thr = thr;
+
+ return LZMA_OK;
+
+error_thread:
+ mythread_cond_destroy(&thr->cond);
+
+error_cond:
+ mythread_mutex_destroy(&thr->mutex);
+
+error_mutex:
+ return LZMA_MEM_ERROR;
+}
+
+
+static lzma_ret
+get_thread(struct lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ // If there is a free structure on the stack, use it.
+ mythread_sync(coder->mutex) {
+ if (coder->threads_free != NULL) {
+ coder->thr = coder->threads_free;
+ coder->threads_free = coder->threads_free->next;
+
+ // The thread is no longer in the cache so subtract
+ // it from the cached memory usage. Don't add it
+ // to mem_in_use though; the caller will handle it
+ // since it knows how much memory it will actually
+ // use (the filter chain might change).
+ coder->mem_cached -= coder->thr->mem_filters;
+ }
+ }
+
+ if (coder->thr == NULL) {
+ assert(coder->threads_initialized < coder->threads_max);
+
+ // Initialize a new thread.
+ return_if_error(initialize_new_thread(coder, allocator));
+ }
+
+ coder->thr->in_filled = 0;
+ coder->thr->in_pos = 0;
+ coder->thr->out_pos = 0;
+
+ coder->thr->progress_in = 0;
+ coder->thr->progress_out = 0;
+
+ coder->thr->partial_update = PARTIAL_DISABLED;
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+read_output_and_wait(struct lzma_stream_coder *coder,
+ const lzma_allocator *allocator,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size,
+ bool *input_is_possible,
+ bool waiting_allowed,
+ mythread_condtime *wait_abs, bool *has_blocked)
+{
+ lzma_ret ret = LZMA_OK;
+
+ mythread_sync(coder->mutex) {
+ do {
+ // Get as much output from the queue as is possible
+ // without blocking.
+ const size_t out_start = *out_pos;
+ do {
+ ret = lzma_outq_read(&coder->outq, allocator,
+ out, out_pos, out_size,
+ NULL, NULL);
+
+ // If a Block was finished, tell the worker
+ // thread of the next Block (if it is still
+ // running) to start telling the main thread
+ // when new output is available.
+ if (ret == LZMA_STREAM_END)
+ lzma_outq_enable_partial_output(
+ &coder->outq,
+ &worker_enable_partial_update);
+
+ // Loop until a Block wasn't finished.
+ // It's important to loop around even if
+ // *out_pos == out_size because there could
+ // be an empty Block that will return
+ // LZMA_STREAM_END without needing any
+ // output space.
+ } while (ret == LZMA_STREAM_END);
+
+ // Check if lzma_outq_read reported an error from
+ // the Block decoder.
+ if (ret != LZMA_OK)
+ break;
+
+ // If the output buffer is now full but it wasn't full
+ // when this function was called, set out_was_filled.
+ // This way the next call to stream_decode_mt() knows
+ // that some output was produced and no output space
+ // remained in the previous call to stream_decode_mt().
+ if (*out_pos == out_size && *out_pos != out_start)
+ coder->out_was_filled = true;
+
+ // Check if any thread has indicated an error.
+ if (coder->thread_error != LZMA_OK) {
+ // If LZMA_FAIL_FAST was used, report errors
+ // from worker threads immediately.
+ if (coder->fail_fast) {
+ ret = coder->thread_error;
+ break;
+ }
+
+ // Otherwise set pending_error. The value we
+ // set here will not actually get used other
+ // than working as a flag that an error has
+ // occurred. This is because in SEQ_ERROR
+ // all output before the error will be read
+ // first by calling this function, and once we
+ // reach the location of the (first) error the
+ // error code from the above lzma_outq_read()
+ // will be returned to the application.
+ //
+ // Use LZMA_PROG_ERROR since the value should
+ // never leak to the application. It's
+ // possible that pending_error has already
+ // been set but that doesn't matter: if we get
+ // here, pending_error only works as a flag.
+ coder->pending_error = LZMA_PROG_ERROR;
+ }
+
+ // Check if decoding of the next Block can be started.
+ // The memusage of the active threads must be low
+ // enough, there must be a free buffer slot in the
+ // output queue, and there must be a free thread
+ // (that can be either created or an existing one
+ // reused).
+ //
+ // NOTE: This is checked after reading the output
+ // above because reading the output can free a slot in
+ // the output queue and also reduce active memusage.
+ //
+ // NOTE: If output queue is empty, then input will
+ // always be possible.
+ if (input_is_possible != NULL
+ && coder->memlimit_threading
+ - coder->mem_in_use
+ - coder->outq.mem_in_use
+ >= coder->mem_next_block
+ && lzma_outq_has_buf(&coder->outq)
+ && (coder->threads_initialized
+ < coder->threads_max
+ || coder->threads_free
+ != NULL)) {
+ *input_is_possible = true;
+ break;
+ }
+
+ // If the caller doesn't want us to block, return now.
+ if (!waiting_allowed)
+ break;
+
+ // This check is needed only when input_is_possible
+ // is NULL. We must return if we aren't waiting for
+ // input to become possible and there is no more
+ // output coming from the queue.
+ if (lzma_outq_is_empty(&coder->outq)) {
+ assert(input_is_possible == NULL);
+ break;
+ }
+
+ // If there is more data available from the queue,
+ // our out buffer must be full and we need to return
+ // so that the application can provide more output
+ // space.
+ //
+ // NOTE: In general lzma_outq_is_readable() can return
+ // true also when there are no more bytes available.
+ // This can happen when a Block has finished without
+ // providing any new output. We know that this is not
+ // the case because in the beginning of this loop we
+ // tried to read as much as possible even when we had
+ // no output space left and the mutex has been locked
+ // all the time (so worker threads cannot have changed
+ // anything). Thus there must be actual pending output
+ // in the queue.
+ if (lzma_outq_is_readable(&coder->outq)) {
+ assert(*out_pos == out_size);
+ break;
+ }
+
+ // If the application stops providing more input
+ // in the middle of a Block, there will eventually
+ // be one worker thread left that is stuck waiting for
+ // more input (that might never arrive) and a matching
+ // outbuf which the worker thread cannot finish due
+ // to lack of input. We must detect this situation,
+ // otherwise we would end up waiting indefinitely
+ // (if no timeout is in use) or keep returning
+ // LZMA_TIMED_OUT while making no progress. Thus, the
+ // application would never get LZMA_BUF_ERROR from
+ // lzma_code() which would tell the application that
+ // no more progress is possible. No LZMA_BUF_ERROR
+ // means that, for example, truncated .xz files could
+ // cause an infinite loop.
+ //
+ // A worker thread doing partial updates will
+ // store not only the output position in outbuf->pos
+ // but also the matching input position in
+ // outbuf->decoder_in_pos. Here we check if that
+ // input position matches the amount of input that
+ // the worker thread has been given (in_filled).
+ // If so, we must return and not wait as no more
+ // output will be coming without first getting more
+ // input to the worker thread. If the application
+ // keeps calling lzma_code() without providing more
+ // input, it will eventually get LZMA_BUF_ERROR.
+ //
+ // NOTE: We can read partial_update and in_filled
+ // without thr->mutex as only the main thread
+ // modifies these variables. decoder_in_pos requires
+ // coder->mutex which we are already holding.
+ if (coder->thr != NULL && coder->thr->partial_update
+ != PARTIAL_DISABLED) {
+ // There is exactly one outbuf in the queue.
+ assert(coder->thr->outbuf == coder->outq.head);
+ assert(coder->thr->outbuf == coder->outq.tail);
+
+ if (coder->thr->outbuf->decoder_in_pos
+ == coder->thr->in_filled)
+ break;
+ }
+
+ // Wait for input or output to become possible.
+ if (coder->timeout != 0) {
+ // See the comment in stream_encoder_mt.c
+ // about why mythread_condtime_set() is used
+ // like this.
+ //
+ // FIXME?
+ // In contrast to the encoder, this calls
+ // _condtime_set while the mutex is locked.
+ if (!*has_blocked) {
+ *has_blocked = true;
+ mythread_condtime_set(wait_abs,
+ &coder->cond,
+ coder->timeout);
+ }
+
+ if (mythread_cond_timedwait(&coder->cond,
+ &coder->mutex,
+ wait_abs) != 0) {
+ ret = LZMA_TIMED_OUT;
+ break;
+ }
+ } else {
+ mythread_cond_wait(&coder->cond,
+ &coder->mutex);
+ }
+ } while (ret == LZMA_OK);
+ }
+
+ // If we are returning an error, then the application cannot get
+ // more output from us and thus keeping the threads running is
+ // useless and waste of CPU time.
+ if (ret != LZMA_OK && ret != LZMA_TIMED_OUT)
+ threads_stop(coder);
+
+ return ret;
+}
+
+
+static lzma_ret
+decode_block_header(struct lzma_stream_coder *coder,
+ const lzma_allocator *allocator, const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size)
+{
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ if (coder->pos == 0) {
+ // Detect if it's Index.
+ if (in[*in_pos] == INDEX_INDICATOR)
+ return LZMA_INDEX_DETECTED;
+
+ // Calculate the size of the Block Header. Note that
+ // Block Header decoder wants to see this byte too
+ // so don't advance *in_pos.
+ coder->block_options.header_size
+ = lzma_block_header_size_decode(
+ in[*in_pos]);
+ }
+
+ // Copy the Block Header to the internal buffer.
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ coder->block_options.header_size);
+
+ // Return if we didn't get the whole Block Header yet.
+ if (coder->pos < coder->block_options.header_size)
+ return LZMA_OK;
+
+ coder->pos = 0;
+
+ // Version 1 is needed to support the .ignore_check option.
+ coder->block_options.version = 1;
+
+ // Block Header decoder will initialize all members of this array
+ // so we don't need to do it here.
+ coder->block_options.filters = coder->filters;
+
+ // Decode the Block Header.
+ return_if_error(lzma_block_header_decode(&coder->block_options,
+ allocator, coder->buffer));
+
+ // If LZMA_IGNORE_CHECK was used, this flag needs to be set.
+ // It has to be set after lzma_block_header_decode() because
+ // it always resets this to false.
+ coder->block_options.ignore_check = coder->ignore_check;
+
+ // coder->block_options is ready now.
+ return LZMA_STREAM_END;
+}
+
+
+/// Get the size of the Compressed Data + Block Padding + Check.
+static size_t
+comp_blk_size(const struct lzma_stream_coder *coder)
+{
+ return vli_ceil4(coder->block_options.compressed_size)
+ + lzma_check_size(coder->stream_flags.check);
+}
+
+
+/// Returns true if the size (compressed or uncompressed) is such that
+/// threaded decompression cannot be used. Sizes that are too big compared
+/// to SIZE_MAX must be rejected to avoid integer overflows and truncations
+/// when lzma_vli is assigned to a size_t.
+static bool
+is_direct_mode_needed(lzma_vli size)
+{
+ return size == LZMA_VLI_UNKNOWN || size > SIZE_MAX / 3;
+}
+
+
+static lzma_ret
+stream_decoder_reset(struct lzma_stream_coder *coder,
+ const lzma_allocator *allocator)
+{
+ // Initialize the Index hash used to verify the Index.
+ coder->index_hash = lzma_index_hash_init(coder->index_hash, allocator);
+ if (coder->index_hash == NULL)
+ return LZMA_MEM_ERROR;
+
+ // Reset the rest of the variables.
+ coder->sequence = SEQ_STREAM_HEADER;
+ coder->pos = 0;
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+stream_decode_mt(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size, lzma_action action)
+{
+ struct lzma_stream_coder *coder = coder_ptr;
+
+ mythread_condtime wait_abs;
+ bool has_blocked = false;
+
+ // Determine if in SEQ_BLOCK_HEADER and SEQ_BLOCK_THR_RUN we should
+ // tell read_output_and_wait() to wait until it can fill the output
+ // buffer (or a timeout occurs). Two conditions must be met:
+ //
+ // (1) If the caller provided no new input. The reason for this
+ // can be, for example, the end of the file or that there is
+ // a pause in the input stream and more input is available
+ // a little later. In this situation we should wait for output
+ // because otherwise we would end up in a busy-waiting loop where
+ // we make no progress and the application just calls us again
+ // without providing any new input. This would then result in
+ // LZMA_BUF_ERROR even though more output would be available
+ // once the worker threads decode more data.
+ //
+ // (2) Even if (1) is true, we will not wait if the previous call to
+ // this function managed to produce some output and the output
+ // buffer became full. This is for compatibility with applications
+ // that call lzma_code() in such a way that new input is provided
+ // only when the output buffer didn't become full. Without this
+ // trick such applications would have bad performance (bad
+ // parallelization due to decoder not getting input fast enough).
+ //
+ // NOTE: Such loops might require that timeout is disabled (0)
+ // if they assume that output-not-full implies that all input has
+ // been consumed. If and only if timeout is enabled, we may return
+ // when output isn't full *and* not all input has been consumed.
+ //
+ // However, if LZMA_FINISH is used, the above is ignored and we always
+ // wait (timeout can still cause us to return) because we know that
+ // we won't get any more input. This matters if the input file is
+ // truncated and we are doing single-shot decoding, that is,
+ // timeout = 0 and LZMA_FINISH is used on the first call to
+ // lzma_code() and the output buffer is known to be big enough
+ // to hold all uncompressed data:
+ //
+ // - If LZMA_FINISH wasn't handled specially, we could return
+ // LZMA_OK before providing all output that is possible with the
+ // truncated input. The rest would be available if lzma_code() was
+ // called again but then it's not single-shot decoding anymore.
+ //
+ // - By handling LZMA_FINISH specially here, the first call will
+ // produce all the output, matching the behavior of the
+ // single-threaded decoder.
+ //
+ // So it's a very specific corner case but also easy to avoid. Note
+ // that this special handling of LZMA_FINISH has no effect for
+ // single-shot decoding when the input file is valid (not truncated);
+ // premature LZMA_OK wouldn't be possible as long as timeout = 0.
+ const bool waiting_allowed = action == LZMA_FINISH
+ || (*in_pos == in_size && !coder->out_was_filled);
+ coder->out_was_filled = false;
+
+ while (true)
+ switch (coder->sequence) {
+ case SEQ_STREAM_HEADER: {
+ // Copy the Stream Header to the internal buffer.
+ const size_t in_old = *in_pos;
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ LZMA_STREAM_HEADER_SIZE);
+ coder->progress_in += *in_pos - in_old;
+
+ // Return if we didn't get the whole Stream Header yet.
+ if (coder->pos < LZMA_STREAM_HEADER_SIZE)
+ return LZMA_OK;
+
+ coder->pos = 0;
+
+ // Decode the Stream Header.
+ const lzma_ret ret = lzma_stream_header_decode(
+ &coder->stream_flags, coder->buffer);
+ if (ret != LZMA_OK)
+ return ret == LZMA_FORMAT_ERROR && !coder->first_stream
+ ? LZMA_DATA_ERROR : ret;
+
+ // If we are decoding concatenated Streams, and the later
+ // Streams have invalid Header Magic Bytes, we give
+ // LZMA_DATA_ERROR instead of LZMA_FORMAT_ERROR.
+ coder->first_stream = false;
+
+ // Copy the type of the Check so that Block Header and Block
+ // decoders see it.
+ coder->block_options.check = coder->stream_flags.check;
+
+ // Even if we return LZMA_*_CHECK below, we want
+ // to continue from Block Header decoding.
+ coder->sequence = SEQ_BLOCK_HEADER;
+
+ // Detect if there's no integrity check or if it is
+ // unsupported if those were requested by the application.
+ if (coder->tell_no_check && coder->stream_flags.check
+ == LZMA_CHECK_NONE)
+ return LZMA_NO_CHECK;
+
+ if (coder->tell_unsupported_check
+ && !lzma_check_is_supported(
+ coder->stream_flags.check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ if (coder->tell_any_check)
+ return LZMA_GET_CHECK;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_HEADER: {
+ const size_t in_old = *in_pos;
+ const lzma_ret ret = decode_block_header(coder, allocator,
+ in, in_pos, in_size);
+ coder->progress_in += *in_pos - in_old;
+
+ if (ret == LZMA_OK) {
+ // We didn't decode the whole Block Header yet.
+ //
+ // Read output from the queue before returning. This
+ // is important because it is possible that the
+ // application doesn't have any new input available
+ // immediately. If we didn't try to copy output from
+ // the output queue here, lzma_code() could end up
+ // returning LZMA_BUF_ERROR even though queued output
+ // is available.
+ //
+ // If the lzma_code() call provided at least one input
+ // byte, only copy as much data from the output queue
+ // as is available immediately. This way the
+ // application will be able to provide more input
+ // without a delay.
+ //
+ // On the other hand, if lzma_code() was called with
+ // an empty input buffer(*), treat it specially: try
+ // to fill the output buffer even if it requires
+ // waiting for the worker threads to provide output
+ // (timeout, if specified, can still cause us to
+ // return).
+ //
+ // - This way the application will be able to get all
+ // data that can be decoded from the input provided
+ // so far.
+ //
+ // - We avoid both premature LZMA_BUF_ERROR and
+ // busy-waiting where the application repeatedly
+ // calls lzma_code() which immediately returns
+ // LZMA_OK without providing new data.
+ //
+ // - If the queue becomes empty, we won't wait
+ // anything and will return LZMA_OK immediately
+ // (coder->timeout is completely ignored).
+ //
+ // (*) See the comment at the beginning of this
+ // function how waiting_allowed is determined
+ // and why there is an exception to the rule
+ // of "called with an empty input buffer".
+ assert(*in_pos == in_size);
+
+ // If LZMA_FINISH was used we know that we won't get
+ // more input, so the file must be truncated if we
+ // get here. If worker threads don't detect any
+ // errors, eventually there will be no more output
+ // while we keep returning LZMA_OK which gets
+ // converted to LZMA_BUF_ERROR in lzma_code().
+ //
+ // If fail-fast is enabled then we will return
+ // immediately using LZMA_DATA_ERROR instead of
+ // LZMA_OK or LZMA_BUF_ERROR. Rationale for the
+ // error code:
+ //
+ // - Worker threads may have a large amount of
+ // not-yet-decoded input data and we don't
+ // know for sure if all data is valid. Bad
+ // data there would result in LZMA_DATA_ERROR
+ // when fail-fast isn't used.
+ //
+ // - Immediate LZMA_BUF_ERROR would be a bit weird
+ // considering the older liblzma code. lzma_code()
+ // even has an assertion to prevent coders from
+ // returning LZMA_BUF_ERROR directly.
+ //
+ // The downside of this is that with fail-fast apps
+ // cannot always distinguish between corrupt and
+ // truncated files.
+ if (action == LZMA_FINISH && coder->fail_fast) {
+ // We won't produce any more output. Stop
+ // the unfinished worker threads so they
+ // won't waste CPU time.
+ threads_stop(coder);
+ return LZMA_DATA_ERROR;
+ }
+
+ // read_output_and_wait() will call threads_stop()
+ // if needed so with that we can use return_if_error.
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, waiting_allowed,
+ &wait_abs, &has_blocked));
+
+ if (coder->pending_error != LZMA_OK) {
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ return LZMA_OK;
+ }
+
+ if (ret == LZMA_INDEX_DETECTED) {
+ coder->sequence = SEQ_INDEX_WAIT_OUTPUT;
+ break;
+ }
+
+ // See if an error occurred.
+ if (ret != LZMA_STREAM_END) {
+ // NOTE: Here and in all other places where
+ // pending_error is set, it may overwrite the value
+ // (LZMA_PROG_ERROR) set by read_output_and_wait().
+ // That function might overwrite value set here too.
+ // These are fine because when read_output_and_wait()
+ // sets pending_error, it actually works as a flag
+ // variable only ("some error has occurred") and the
+ // actual value of pending_error is not used in
+ // SEQ_ERROR. In such cases SEQ_ERROR will eventually
+ // get the correct error code from the return value of
+ // a later read_output_and_wait() call.
+ coder->pending_error = ret;
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ // Calculate the memory usage of the filters / Block decoder.
+ coder->mem_next_filters = lzma_raw_decoder_memusage(
+ coder->filters);
+
+ if (coder->mem_next_filters == UINT64_MAX) {
+ // One or more unknown Filter IDs.
+ coder->pending_error = LZMA_OPTIONS_ERROR;
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ coder->sequence = SEQ_BLOCK_INIT;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_INIT: {
+ // Check if decoding is possible at all with the current
+ // memlimit_stop which we must never exceed.
+ //
+ // This needs to be the first thing in SEQ_BLOCK_INIT
+ // to make it possible to restart decoding after increasing
+ // memlimit_stop with lzma_memlimit_set().
+ if (coder->mem_next_filters > coder->memlimit_stop) {
+ // Flush pending output before returning
+ // LZMA_MEMLIMIT_ERROR. If the application doesn't
+ // want to increase the limit, at least it will get
+ // all the output possible so far.
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, true, &wait_abs, &has_blocked));
+
+ if (!lzma_outq_is_empty(&coder->outq))
+ return LZMA_OK;
+
+ return LZMA_MEMLIMIT_ERROR;
+ }
+
+ // Check if the size information is available in Block Header.
+ // If it is, check if the sizes are small enough that we don't
+ // need to worry *too* much about integer overflows later in
+ // the code. If these conditions are not met, we must use the
+ // single-threaded direct mode.
+ if (is_direct_mode_needed(coder->block_options.compressed_size)
+ || is_direct_mode_needed(
+ coder->block_options.uncompressed_size)) {
+ coder->sequence = SEQ_BLOCK_DIRECT_INIT;
+ break;
+ }
+
+ // Calculate the amount of memory needed for the input and
+ // output buffers in threaded mode.
+ //
+ // These cannot overflow because we already checked that
+ // the sizes are small enough using is_direct_mode_needed().
+ coder->mem_next_in = comp_blk_size(coder);
+ const uint64_t mem_buffers = coder->mem_next_in
+ + lzma_outq_outbuf_memusage(
+ coder->block_options.uncompressed_size);
+
+ // Add the amount needed by the filters.
+ // Avoid integer overflows.
+ if (UINT64_MAX - mem_buffers < coder->mem_next_filters) {
+ // Use direct mode if the memusage would overflow.
+ // This is a theoretical case that shouldn't happen
+ // in practice unless the input file is weird (broken
+ // or malicious).
+ coder->sequence = SEQ_BLOCK_DIRECT_INIT;
+ break;
+ }
+
+ // Amount of memory needed to decode this Block in
+ // threaded mode:
+ coder->mem_next_block = coder->mem_next_filters + mem_buffers;
+
+ // If this alone would exceed memlimit_threading, then we must
+ // use the single-threaded direct mode.
+ if (coder->mem_next_block > coder->memlimit_threading) {
+ coder->sequence = SEQ_BLOCK_DIRECT_INIT;
+ break;
+ }
+
+ // Use the threaded mode. Free the direct mode decoder in
+ // case it has been initialized.
+ lzma_next_end(&coder->block_decoder, allocator);
+ coder->mem_direct_mode = 0;
+
+ // Since we already know what the sizes are supposed to be,
+ // we can already add them to the Index hash. The Block
+ // decoder will verify the values while decoding.
+ const lzma_ret ret = lzma_index_hash_append(coder->index_hash,
+ lzma_block_unpadded_size(
+ &coder->block_options),
+ coder->block_options.uncompressed_size);
+ if (ret != LZMA_OK) {
+ coder->pending_error = ret;
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ coder->sequence = SEQ_BLOCK_THR_INIT;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_THR_INIT: {
+ // We need to wait for a multiple conditions to become true
+ // until we can initialize the Block decoder and let a worker
+ // thread decode it:
+ //
+ // - Wait for the memory usage of the active threads to drop
+ // so that starting the decoding of this Block won't make
+ // us go over memlimit_threading.
+ //
+ // - Wait for at least one free output queue slot.
+ //
+ // - Wait for a free worker thread.
+ //
+ // While we wait, we must copy decompressed data to the out
+ // buffer and catch possible decoder errors.
+ //
+ // read_output_and_wait() does all the above.
+ bool block_can_start = false;
+
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ &block_can_start, true,
+ &wait_abs, &has_blocked));
+
+ if (coder->pending_error != LZMA_OK) {
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ if (!block_can_start) {
+ // It's not a timeout because return_if_error handles
+ // it already. Output queue cannot be empty either
+ // because in that case block_can_start would have
+ // been true. Thus the output buffer must be full and
+ // the queue isn't empty.
+ assert(*out_pos == out_size);
+ assert(!lzma_outq_is_empty(&coder->outq));
+ return LZMA_OK;
+ }
+
+ // We know that we can start decoding this Block without
+ // exceeding memlimit_threading. However, to stay below
+ // memlimit_threading may require freeing some of the
+ // cached memory.
+ //
+ // Get a local copy of variables that require locking the
+ // mutex. It is fine if the worker threads modify the real
+ // values after we read these as those changes can only be
+ // towards more favorable conditions (less memory in use,
+ // more in cache).
+ //
+ // These are initialized to silence warnings.
+ uint64_t mem_in_use = 0;
+ uint64_t mem_cached = 0;
+ struct worker_thread *thr = NULL;
+
+ mythread_sync(coder->mutex) {
+ mem_in_use = coder->mem_in_use;
+ mem_cached = coder->mem_cached;
+ thr = coder->threads_free;
+ }
+
+ // The maximum amount of memory that can be held by other
+ // threads and cached buffers while allowing us to start
+ // decoding the next Block.
+ const uint64_t mem_max = coder->memlimit_threading
+ - coder->mem_next_block;
+
+ // If the existing allocations are so large that starting
+ // to decode this Block might exceed memlimit_threads,
+ // try to free memory from the output queue cache first.
+ //
+ // NOTE: This math assumes the worst case. It's possible
+ // that the limit wouldn't be exceeded if the existing cached
+ // allocations are reused.
+ if (mem_in_use + mem_cached + coder->outq.mem_allocated
+ > mem_max) {
+ // Clear the outq cache except leave one buffer in
+ // the cache if its size is correct. That way we
+ // don't free and almost immediately reallocate
+ // an identical buffer.
+ lzma_outq_clear_cache2(&coder->outq, allocator,
+ coder->block_options.uncompressed_size);
+ }
+
+ // If there is at least one worker_thread in the cache and
+ // the existing allocations are so large that starting to
+ // decode this Block might exceed memlimit_threads, free
+ // memory by freeing cached Block decoders.
+ //
+ // NOTE: The comparison is different here than above.
+ // Here we don't care about cached buffers in outq anymore
+ // and only look at memory actually in use. This is because
+ // if there is something in outq cache, it's a single buffer
+ // that can be used as is. We ensured this in the above
+ // if-block.
+ uint64_t mem_freed = 0;
+ if (thr != NULL && mem_in_use + mem_cached
+ + coder->outq.mem_in_use > mem_max) {
+ // Don't free the first Block decoder if its memory
+ // usage isn't greater than what this Block will need.
+ // Typically the same filter chain is used for all
+ // Blocks so this way the allocations can be reused
+ // when get_thread() picks the first worker_thread
+ // from the cache.
+ if (thr->mem_filters <= coder->mem_next_filters)
+ thr = thr->next;
+
+ while (thr != NULL) {
+ lzma_next_end(&thr->block_decoder, allocator);
+ mem_freed += thr->mem_filters;
+ thr->mem_filters = 0;
+ thr = thr->next;
+ }
+ }
+
+ // Update the memory usage counters. Note that coder->mem_*
+ // may have changed since we read them so we must subtract
+ // or add the changes.
+ mythread_sync(coder->mutex) {
+ coder->mem_cached -= mem_freed;
+
+ // Memory needed for the filters and the input buffer.
+ // The output queue takes care of its own counter so
+ // we don't touch it here.
+ //
+ // NOTE: After this, coder->mem_in_use +
+ // coder->mem_cached might count the same thing twice.
+ // If so, this will get corrected in get_thread() when
+ // a worker_thread is picked from coder->free_threads
+ // and its memory usage is subtracted from mem_cached.
+ coder->mem_in_use += coder->mem_next_in
+ + coder->mem_next_filters;
+ }
+
+ // Allocate memory for the output buffer in the output queue.
+ lzma_ret ret = lzma_outq_prealloc_buf(
+ &coder->outq, allocator,
+ coder->block_options.uncompressed_size);
+ if (ret != LZMA_OK) {
+ threads_stop(coder);
+ return ret;
+ }
+
+ // Set up coder->thr.
+ ret = get_thread(coder, allocator);
+ if (ret != LZMA_OK) {
+ threads_stop(coder);
+ return ret;
+ }
+
+ // The new Block decoder memory usage is already counted in
+ // coder->mem_in_use. Store it in the thread too.
+ coder->thr->mem_filters = coder->mem_next_filters;
+
+ // Initialize the Block decoder.
+ coder->thr->block_options = coder->block_options;
+ ret = lzma_block_decoder_init(
+ &coder->thr->block_decoder, allocator,
+ &coder->thr->block_options);
+
+ // Free the allocated filter options since they are needed
+ // only to initialize the Block decoder.
+ lzma_filters_free(coder->filters, allocator);
+ coder->thr->block_options.filters = NULL;
+
+ // Check if memory usage calculation and Block encoder
+ // initialization succeeded.
+ if (ret != LZMA_OK) {
+ coder->pending_error = ret;
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ // Allocate the input buffer.
+ coder->thr->in_size = coder->mem_next_in;
+ coder->thr->in = lzma_alloc(coder->thr->in_size, allocator);
+ if (coder->thr->in == NULL) {
+ threads_stop(coder);
+ return LZMA_MEM_ERROR;
+ }
+
+ // Get the preallocated output buffer.
+ coder->thr->outbuf = lzma_outq_get_buf(
+ &coder->outq, coder->thr);
+
+ // Start the decoder.
+ mythread_sync(coder->thr->mutex) {
+ assert(coder->thr->state == THR_IDLE);
+ coder->thr->state = THR_RUN;
+ mythread_cond_signal(&coder->thr->cond);
+ }
+
+ // Enable output from the thread that holds the oldest output
+ // buffer in the output queue (if such a thread exists).
+ mythread_sync(coder->mutex) {
+ lzma_outq_enable_partial_output(&coder->outq,
+ &worker_enable_partial_update);
+ }
+
+ coder->sequence = SEQ_BLOCK_THR_RUN;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_THR_RUN: {
+ if (action == LZMA_FINISH && coder->fail_fast) {
+ // We know that we won't get more input and that
+ // the caller wants fail-fast behavior. If we see
+ // that we don't have enough input to finish this
+ // Block, return LZMA_DATA_ERROR immediately.
+ // See SEQ_BLOCK_HEADER for the error code rationale.
+ const size_t in_avail = in_size - *in_pos;
+ const size_t in_needed = coder->thr->in_size
+ - coder->thr->in_filled;
+ if (in_avail < in_needed) {
+ threads_stop(coder);
+ return LZMA_DATA_ERROR;
+ }
+ }
+
+ // Copy input to the worker thread.
+ size_t cur_in_filled = coder->thr->in_filled;
+ lzma_bufcpy(in, in_pos, in_size, coder->thr->in,
+ &cur_in_filled, coder->thr->in_size);
+
+ // Tell the thread how much we copied.
+ mythread_sync(coder->thr->mutex) {
+ coder->thr->in_filled = cur_in_filled;
+
+ // NOTE: Most of the time we are copying input faster
+ // than the thread can decode so most of the time
+ // calling mythread_cond_signal() is useless but
+ // we cannot make it conditional because thr->in_pos
+ // is updated without a mutex. And the overhead should
+ // be very much negligible anyway.
+ mythread_cond_signal(&coder->thr->cond);
+ }
+
+ // Read output from the output queue. Just like in
+ // SEQ_BLOCK_HEADER, we wait to fill the output buffer
+ // only if waiting_allowed was set to true in the beginning
+ // of this function (see the comment there).
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, waiting_allowed,
+ &wait_abs, &has_blocked));
+
+ if (coder->pending_error != LZMA_OK) {
+ coder->sequence = SEQ_ERROR;
+ break;
+ }
+
+ // Return if the input didn't contain the whole Block.
+ if (coder->thr->in_filled < coder->thr->in_size) {
+ assert(*in_pos == in_size);
+ return LZMA_OK;
+ }
+
+ // The whole Block has been copied to the thread-specific
+ // buffer. Continue from the next Block Header or Index.
+ coder->thr = NULL;
+ coder->sequence = SEQ_BLOCK_HEADER;
+ break;
+ }
+
+ case SEQ_BLOCK_DIRECT_INIT: {
+ // Wait for the threads to finish and that all decoded data
+ // has been copied to the output. That is, wait until the
+ // output queue becomes empty.
+ //
+ // NOTE: No need to check for coder->pending_error as
+ // we aren't consuming any input until the queue is empty
+ // and if there is a pending error, read_output_and_wait()
+ // will eventually return it before the queue is empty.
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, true, &wait_abs, &has_blocked));
+ if (!lzma_outq_is_empty(&coder->outq))
+ return LZMA_OK;
+
+ // Free the cached output buffers.
+ lzma_outq_clear_cache(&coder->outq, allocator);
+
+ // Get rid of the worker threads, including the coder->threads
+ // array.
+ threads_end(coder, allocator);
+
+ // Initialize the Block decoder.
+ const lzma_ret ret = lzma_block_decoder_init(
+ &coder->block_decoder, allocator,
+ &coder->block_options);
+
+ // Free the allocated filter options since they are needed
+ // only to initialize the Block decoder.
+ lzma_filters_free(coder->filters, allocator);
+ coder->block_options.filters = NULL;
+
+ // Check if Block decoder initialization succeeded.
+ if (ret != LZMA_OK)
+ return ret;
+
+ // Make the memory usage visible to _memconfig().
+ coder->mem_direct_mode = coder->mem_next_filters;
+
+ coder->sequence = SEQ_BLOCK_DIRECT_RUN;
+ }
+
+ // Fall through
+
+ case SEQ_BLOCK_DIRECT_RUN: {
+ const size_t in_old = *in_pos;
+ const size_t out_old = *out_pos;
+ const lzma_ret ret = coder->block_decoder.code(
+ coder->block_decoder.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ action);
+ coder->progress_in += *in_pos - in_old;
+ coder->progress_out += *out_pos - out_old;
+
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // Block decoded successfully. Add the new size pair to
+ // the Index hash.
+ return_if_error(lzma_index_hash_append(coder->index_hash,
+ lzma_block_unpadded_size(
+ &coder->block_options),
+ coder->block_options.uncompressed_size));
+
+ coder->sequence = SEQ_BLOCK_HEADER;
+ break;
+ }
+
+ case SEQ_INDEX_WAIT_OUTPUT:
+ // Flush the output from all worker threads so that we can
+ // decode the Index without thinking about threading.
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, true, &wait_abs, &has_blocked));
+
+ if (!lzma_outq_is_empty(&coder->outq))
+ return LZMA_OK;
+
+ coder->sequence = SEQ_INDEX_DECODE;
+
+ // Fall through
+
+ case SEQ_INDEX_DECODE: {
+ // If we don't have any input, don't call
+ // lzma_index_hash_decode() since it would return
+ // LZMA_BUF_ERROR, which we must not do here.
+ if (*in_pos >= in_size)
+ return LZMA_OK;
+
+ // Decode the Index and compare it to the hash calculated
+ // from the sizes of the Blocks (if any).
+ const size_t in_old = *in_pos;
+ const lzma_ret ret = lzma_index_hash_decode(coder->index_hash,
+ in, in_pos, in_size);
+ coder->progress_in += *in_pos - in_old;
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ coder->sequence = SEQ_STREAM_FOOTER;
+ }
+
+ // Fall through
+
+ case SEQ_STREAM_FOOTER: {
+ // Copy the Stream Footer to the internal buffer.
+ const size_t in_old = *in_pos;
+ lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
+ LZMA_STREAM_HEADER_SIZE);
+ coder->progress_in += *in_pos - in_old;
+
+ // Return if we didn't get the whole Stream Footer yet.
+ if (coder->pos < LZMA_STREAM_HEADER_SIZE)
+ return LZMA_OK;
+
+ coder->pos = 0;
+
+ // Decode the Stream Footer. The decoder gives
+ // LZMA_FORMAT_ERROR if the magic bytes don't match,
+ // so convert that return code to LZMA_DATA_ERROR.
+ lzma_stream_flags footer_flags;
+ const lzma_ret ret = lzma_stream_footer_decode(
+ &footer_flags, coder->buffer);
+ if (ret != LZMA_OK)
+ return ret == LZMA_FORMAT_ERROR
+ ? LZMA_DATA_ERROR : ret;
+
+ // Check that Index Size stored in the Stream Footer matches
+ // the real size of the Index field.
+ if (lzma_index_hash_size(coder->index_hash)
+ != footer_flags.backward_size)
+ return LZMA_DATA_ERROR;
+
+ // Compare that the Stream Flags fields are identical in
+ // both Stream Header and Stream Footer.
+ return_if_error(lzma_stream_flags_compare(
+ &coder->stream_flags, &footer_flags));
+
+ if (!coder->concatenated)
+ return LZMA_STREAM_END;
+
+ coder->sequence = SEQ_STREAM_PADDING;
+ }
+
+ // Fall through
+
+ case SEQ_STREAM_PADDING:
+ assert(coder->concatenated);
+
+ // Skip over possible Stream Padding.
+ while (true) {
+ if (*in_pos >= in_size) {
+ // Unless LZMA_FINISH was used, we cannot
+ // know if there's more input coming later.
+ if (action != LZMA_FINISH)
+ return LZMA_OK;
+
+ // Stream Padding must be a multiple of
+ // four bytes.
+ return coder->pos == 0
+ ? LZMA_STREAM_END
+ : LZMA_DATA_ERROR;
+ }
+
+ // If the byte is not zero, it probably indicates
+ // beginning of a new Stream (or the file is corrupt).
+ if (in[*in_pos] != 0x00)
+ break;
+
+ ++*in_pos;
+ ++coder->progress_in;
+ coder->pos = (coder->pos + 1) & 3;
+ }
+
+ // Stream Padding must be a multiple of four bytes (empty
+ // Stream Padding is OK).
+ if (coder->pos != 0) {
+ ++*in_pos;
+ ++coder->progress_in;
+ return LZMA_DATA_ERROR;
+ }
+
+ // Prepare to decode the next Stream.
+ return_if_error(stream_decoder_reset(coder, allocator));
+ break;
+
+ case SEQ_ERROR:
+ if (!coder->fail_fast) {
+ // Let the application get all data before the point
+ // where the error was detected. This matches the
+ // behavior of single-threaded use.
+ //
+ // FIXME? Some errors (LZMA_MEM_ERROR) don't get here,
+ // they are returned immediately. Thus in rare cases
+ // the output will be less than in the single-threaded
+ // mode. Maybe this doesn't matter much in practice.
+ return_if_error(read_output_and_wait(coder, allocator,
+ out, out_pos, out_size,
+ NULL, true, &wait_abs, &has_blocked));
+
+ // We get here only if the error happened in the main
+ // thread, for example, unsupported Block Header.
+ if (!lzma_outq_is_empty(&coder->outq))
+ return LZMA_OK;
+ }
+
+ // We only get here if no errors were detected by the worker
+ // threads. Errors from worker threads would have already been
+ // returned by the call to read_output_and_wait() above.
+ return coder->pending_error;
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ // Never reached
+}
+
+
+static void
+stream_decoder_mt_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ struct lzma_stream_coder *coder = coder_ptr;
+
+ threads_end(coder, allocator);
+ lzma_outq_end(&coder->outq, allocator);
+
+ lzma_next_end(&coder->block_decoder, allocator);
+ lzma_filters_free(coder->filters, allocator);
+ lzma_index_hash_end(coder->index_hash, allocator);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_check
+stream_decoder_mt_get_check(const void *coder_ptr)
+{
+ const struct lzma_stream_coder *coder = coder_ptr;
+ return coder->stream_flags.check;
+}
+
+
+static lzma_ret
+stream_decoder_mt_memconfig(void *coder_ptr, uint64_t *memusage,
+ uint64_t *old_memlimit, uint64_t new_memlimit)
+{
+ // NOTE: This function gets/sets memlimit_stop. For now,
+ // memlimit_threading cannot be modified after initialization.
+ //
+ // *memusage will include cached memory too. Excluding cached memory
+ // would be misleading and it wouldn't help the applications to
+ // know how much memory is actually needed to decompress the file
+ // because the higher the number of threads and the memlimits are
+ // the more memory the decoder may use.
+ //
+ // Setting a new limit includes the cached memory too and too low
+ // limits will be rejected. Alternative could be to free the cached
+ // memory immediately if that helps to bring the limit down but
+ // the current way is the simplest. It's unlikely that limit needs
+ // to be lowered in the middle of a file anyway; the typical reason
+ // to want a new limit is to increase after LZMA_MEMLIMIT_ERROR
+ // and even such use isn't common.
+ struct lzma_stream_coder *coder = coder_ptr;
+
+ mythread_sync(coder->mutex) {
+ *memusage = coder->mem_direct_mode
+ + coder->mem_in_use
+ + coder->mem_cached
+ + coder->outq.mem_allocated;
+ }
+
+ // If no filter chains are allocated, *memusage may be zero.
+ // Always return at least LZMA_MEMUSAGE_BASE.
+ if (*memusage < LZMA_MEMUSAGE_BASE)
+ *memusage = LZMA_MEMUSAGE_BASE;
+
+ *old_memlimit = coder->memlimit_stop;
+
+ if (new_memlimit != 0) {
+ if (new_memlimit < *memusage)
+ return LZMA_MEMLIMIT_ERROR;
+
+ coder->memlimit_stop = new_memlimit;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+stream_decoder_mt_get_progress(void *coder_ptr,
+ uint64_t *progress_in, uint64_t *progress_out)
+{
+ struct lzma_stream_coder *coder = coder_ptr;
+
+ // Lock coder->mutex to prevent finishing threads from moving their
+ // progress info from the worker_thread structure to lzma_stream_coder.
+ mythread_sync(coder->mutex) {
+ *progress_in = coder->progress_in;
+ *progress_out = coder->progress_out;
+
+ for (size_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ *progress_in += coder->threads[i].progress_in;
+ *progress_out += coder->threads[i]
+ .progress_out;
+ }
+ }
+ }
+
+ return;
+}
+
+
+static lzma_ret
+stream_decoder_mt_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_mt *options)
+{
+ struct lzma_stream_coder *coder;
+
+ if (options->threads == 0 || options->threads > LZMA_THREADS_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ if (options->flags & ~LZMA_SUPPORTED_FLAGS)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_next_coder_init(&stream_decoder_mt_init, next, allocator);
+
+ coder = next->coder;
+ if (!coder) {
+ coder = lzma_alloc(sizeof(struct lzma_stream_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+
+ if (mythread_mutex_init(&coder->mutex)) {
+ lzma_free(coder, allocator);
+ return LZMA_MEM_ERROR;
+ }
+
+ if (mythread_cond_init(&coder->cond)) {
+ mythread_mutex_destroy(&coder->mutex);
+ lzma_free(coder, allocator);
+ return LZMA_MEM_ERROR;
+ }
+
+ next->code = &stream_decode_mt;
+ next->end = &stream_decoder_mt_end;
+ next->get_check = &stream_decoder_mt_get_check;
+ next->memconfig = &stream_decoder_mt_memconfig;
+ next->get_progress = &stream_decoder_mt_get_progress;
+
+ coder->filters[0].id = LZMA_VLI_UNKNOWN;
+ memzero(&coder->outq, sizeof(coder->outq));
+
+ coder->block_decoder = LZMA_NEXT_CODER_INIT;
+ coder->mem_direct_mode = 0;
+
+ coder->index_hash = NULL;
+ coder->threads = NULL;
+ coder->threads_free = NULL;
+ coder->threads_initialized = 0;
+ }
+
+ // Cleanup old filter chain if one remains after unfinished decoding
+ // of a previous Stream.
+ lzma_filters_free(coder->filters, allocator);
+
+ // By allocating threads from scratch we can start memory-usage
+ // accounting from scratch, too. Changes in filter and block sizes may
+ // affect number of threads.
+ //
+ // FIXME? Reusing should be easy but unlike the single-threaded
+ // decoder, with some types of input file combinations reusing
+ // could leave quite a lot of memory allocated but unused (first
+ // file could allocate a lot, the next files could use fewer
+ // threads and some of the allocations from the first file would not
+ // get freed unless memlimit_threading forces us to clear caches).
+ //
+ // NOTE: The direct mode decoder isn't freed here if one exists.
+ // It will be reused or freed as needed in the main loop.
+ threads_end(coder, allocator);
+
+ // All memusage counters start at 0 (including mem_direct_mode).
+ // The little extra that is needed for the structs in this file
+ // get accounted well enough by the filter chain memory usage
+ // which adds LZMA_MEMUSAGE_BASE for each chain. However,
+ // stream_decoder_mt_memconfig() has to handle this specially so that
+ // it will never return less than LZMA_MEMUSAGE_BASE as memory usage.
+ coder->mem_in_use = 0;
+ coder->mem_cached = 0;
+ coder->mem_next_block = 0;
+
+ coder->progress_in = 0;
+ coder->progress_out = 0;
+
+ coder->sequence = SEQ_STREAM_HEADER;
+ coder->thread_error = LZMA_OK;
+ coder->pending_error = LZMA_OK;
+ coder->thr = NULL;
+
+ coder->timeout = options->timeout;
+
+ coder->memlimit_threading = my_max(1, options->memlimit_threading);
+ coder->memlimit_stop = my_max(1, options->memlimit_stop);
+ if (coder->memlimit_threading > coder->memlimit_stop)
+ coder->memlimit_threading = coder->memlimit_stop;
+
+ coder->tell_no_check = (options->flags & LZMA_TELL_NO_CHECK) != 0;
+ coder->tell_unsupported_check
+ = (options->flags & LZMA_TELL_UNSUPPORTED_CHECK) != 0;
+ coder->tell_any_check = (options->flags & LZMA_TELL_ANY_CHECK) != 0;
+ coder->ignore_check = (options->flags & LZMA_IGNORE_CHECK) != 0;
+ coder->concatenated = (options->flags & LZMA_CONCATENATED) != 0;
+ coder->fail_fast = (options->flags & LZMA_FAIL_FAST) != 0;
+
+ coder->first_stream = true;
+ coder->out_was_filled = false;
+ coder->pos = 0;
+
+ coder->threads_max = options->threads;
+
+ return_if_error(lzma_outq_init(&coder->outq, allocator,
+ coder->threads_max));
+
+ return stream_decoder_reset(coder, allocator);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_decoder_mt(lzma_stream *strm, const lzma_mt *options)
+{
+ lzma_next_strm_init(stream_decoder_mt_init, strm, options);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_encoder.c b/src/liblzma/common/stream_encoder.c
new file mode 100644
index 0000000..ee92046
--- /dev/null
+++ b/src/liblzma/common/stream_encoder.c
@@ -0,0 +1,355 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_encoder.c
+/// \brief Encodes .xz Streams
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "block_encoder.h"
+#include "index_encoder.h"
+
+
+typedef struct {
+ enum {
+ SEQ_STREAM_HEADER,
+ SEQ_BLOCK_INIT,
+ SEQ_BLOCK_HEADER,
+ SEQ_BLOCK_ENCODE,
+ SEQ_INDEX_ENCODE,
+ SEQ_STREAM_FOOTER,
+ } sequence;
+
+ /// True if Block encoder has been initialized by
+ /// stream_encoder_init() or stream_encoder_update()
+ /// and thus doesn't need to be initialized in stream_encode().
+ bool block_encoder_is_initialized;
+
+ /// Block
+ lzma_next_coder block_encoder;
+
+ /// Options for the Block encoder
+ lzma_block block_options;
+
+ /// The filter chain currently in use
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+ /// Index encoder. This is separate from Block encoder, because this
+ /// doesn't take much memory, and when encoding multiple Streams
+ /// with the same encoding options we avoid reallocating memory.
+ lzma_next_coder index_encoder;
+
+ /// Index to hold sizes of the Blocks
+ lzma_index *index;
+
+ /// Read position in buffer[]
+ size_t buffer_pos;
+
+ /// Total number of bytes in buffer[]
+ size_t buffer_size;
+
+ /// Buffer to hold Stream Header, Block Header, and Stream Footer.
+ /// Block Header has biggest maximum size.
+ uint8_t buffer[LZMA_BLOCK_HEADER_SIZE_MAX];
+} lzma_stream_coder;
+
+
+static lzma_ret
+block_encoder_init(lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ // Prepare the Block options. Even though Block encoder doesn't need
+ // compressed_size, uncompressed_size, and header_size to be
+ // initialized, it is a good idea to do it here, because this way
+ // we catch if someone gave us Filter ID that cannot be used in
+ // Blocks/Streams.
+ coder->block_options.compressed_size = LZMA_VLI_UNKNOWN;
+ coder->block_options.uncompressed_size = LZMA_VLI_UNKNOWN;
+
+ return_if_error(lzma_block_header_size(&coder->block_options));
+
+ // Initialize the actual Block encoder.
+ return lzma_block_encoder_init(&coder->block_encoder, allocator,
+ &coder->block_options);
+}
+
+
+static lzma_ret
+stream_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ // Main loop
+ while (*out_pos < out_size)
+ switch (coder->sequence) {
+ case SEQ_STREAM_HEADER:
+ case SEQ_BLOCK_HEADER:
+ case SEQ_STREAM_FOOTER:
+ lzma_bufcpy(coder->buffer, &coder->buffer_pos,
+ coder->buffer_size, out, out_pos, out_size);
+ if (coder->buffer_pos < coder->buffer_size)
+ return LZMA_OK;
+
+ if (coder->sequence == SEQ_STREAM_FOOTER)
+ return LZMA_STREAM_END;
+
+ coder->buffer_pos = 0;
+ ++coder->sequence;
+ break;
+
+ case SEQ_BLOCK_INIT: {
+ if (*in_pos == in_size) {
+ // If we are requested to flush or finish the current
+ // Block, return LZMA_STREAM_END immediately since
+ // there's nothing to do.
+ if (action != LZMA_FINISH)
+ return action == LZMA_RUN
+ ? LZMA_OK : LZMA_STREAM_END;
+
+ // The application had used LZMA_FULL_FLUSH to finish
+ // the previous Block, but now wants to finish without
+ // encoding new data, or it is simply creating an
+ // empty Stream with no Blocks.
+ //
+ // Initialize the Index encoder, and continue to
+ // actually encoding the Index.
+ return_if_error(lzma_index_encoder_init(
+ &coder->index_encoder, allocator,
+ coder->index));
+ coder->sequence = SEQ_INDEX_ENCODE;
+ break;
+ }
+
+ // Initialize the Block encoder unless it was already
+ // initialized by stream_encoder_init() or
+ // stream_encoder_update().
+ if (!coder->block_encoder_is_initialized)
+ return_if_error(block_encoder_init(coder, allocator));
+
+ // Make it false so that we don't skip the initialization
+ // with the next Block.
+ coder->block_encoder_is_initialized = false;
+
+ // Encode the Block Header. This shouldn't fail since we have
+ // already initialized the Block encoder.
+ if (lzma_block_header_encode(&coder->block_options,
+ coder->buffer) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ coder->buffer_size = coder->block_options.header_size;
+ coder->sequence = SEQ_BLOCK_HEADER;
+ break;
+ }
+
+ case SEQ_BLOCK_ENCODE: {
+ static const lzma_action convert[LZMA_ACTION_MAX + 1] = {
+ LZMA_RUN,
+ LZMA_SYNC_FLUSH,
+ LZMA_FINISH,
+ LZMA_FINISH,
+ LZMA_FINISH,
+ };
+
+ const lzma_ret ret = coder->block_encoder.code(
+ coder->block_encoder.coder, allocator,
+ in, in_pos, in_size,
+ out, out_pos, out_size, convert[action]);
+ if (ret != LZMA_STREAM_END || action == LZMA_SYNC_FLUSH)
+ return ret;
+
+ // Add a new Index Record.
+ const lzma_vli unpadded_size = lzma_block_unpadded_size(
+ &coder->block_options);
+ assert(unpadded_size != 0);
+ return_if_error(lzma_index_append(coder->index, allocator,
+ unpadded_size,
+ coder->block_options.uncompressed_size));
+
+ coder->sequence = SEQ_BLOCK_INIT;
+ break;
+ }
+
+ case SEQ_INDEX_ENCODE: {
+ // Call the Index encoder. It doesn't take any input, so
+ // those pointers can be NULL.
+ const lzma_ret ret = coder->index_encoder.code(
+ coder->index_encoder.coder, allocator,
+ NULL, NULL, 0,
+ out, out_pos, out_size, LZMA_RUN);
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // Encode the Stream Footer into coder->buffer.
+ const lzma_stream_flags stream_flags = {
+ .version = 0,
+ .backward_size = lzma_index_size(coder->index),
+ .check = coder->block_options.check,
+ };
+
+ if (lzma_stream_footer_encode(&stream_flags, coder->buffer)
+ != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ coder->buffer_size = LZMA_STREAM_HEADER_SIZE;
+ coder->sequence = SEQ_STREAM_FOOTER;
+ break;
+ }
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+stream_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ lzma_next_end(&coder->block_encoder, allocator);
+ lzma_next_end(&coder->index_encoder, allocator);
+ lzma_index_end(coder->index, allocator);
+
+ lzma_filters_free(coder->filters, allocator);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+stream_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters,
+ const lzma_filter *reversed_filters)
+{
+ lzma_stream_coder *coder = coder_ptr;
+ lzma_ret ret;
+
+ // Make a copy to a temporary buffer first. This way it is easier
+ // to keep the encoder state unchanged if an error occurs with
+ // lzma_filters_copy().
+ lzma_filter temp[LZMA_FILTERS_MAX + 1];
+ return_if_error(lzma_filters_copy(filters, temp, allocator));
+
+ if (coder->sequence <= SEQ_BLOCK_INIT) {
+ // There is no incomplete Block waiting to be finished,
+ // thus we can change the whole filter chain. Start by
+ // trying to initialize the Block encoder with the new
+ // chain. This way we detect if the chain is valid.
+ coder->block_encoder_is_initialized = false;
+ coder->block_options.filters = temp;
+ ret = block_encoder_init(coder, allocator);
+ coder->block_options.filters = coder->filters;
+ if (ret != LZMA_OK)
+ goto error;
+
+ coder->block_encoder_is_initialized = true;
+
+ } else if (coder->sequence <= SEQ_BLOCK_ENCODE) {
+ // We are in the middle of a Block. Try to update only
+ // the filter-specific options.
+ ret = coder->block_encoder.update(
+ coder->block_encoder.coder, allocator,
+ filters, reversed_filters);
+ if (ret != LZMA_OK)
+ goto error;
+ } else {
+ // Trying to update the filter chain when we are already
+ // encoding Index or Stream Footer.
+ ret = LZMA_PROG_ERROR;
+ goto error;
+ }
+
+ // Free the options of the old chain.
+ lzma_filters_free(coder->filters, allocator);
+
+ // Copy the new filter chain in place.
+ memcpy(coder->filters, temp, sizeof(temp));
+
+ return LZMA_OK;
+
+error:
+ lzma_filters_free(temp, allocator);
+ return ret;
+}
+
+
+static lzma_ret
+stream_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter *filters, lzma_check check)
+{
+ lzma_next_coder_init(&stream_encoder_init, next, allocator);
+
+ if (filters == NULL)
+ return LZMA_PROG_ERROR;
+
+ lzma_stream_coder *coder = next->coder;
+
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &stream_encode;
+ next->end = &stream_encoder_end;
+ next->update = &stream_encoder_update;
+
+ coder->filters[0].id = LZMA_VLI_UNKNOWN;
+ coder->block_encoder = LZMA_NEXT_CODER_INIT;
+ coder->index_encoder = LZMA_NEXT_CODER_INIT;
+ coder->index = NULL;
+ }
+
+ // Basic initializations
+ coder->sequence = SEQ_STREAM_HEADER;
+ coder->block_options.version = 0;
+ coder->block_options.check = check;
+
+ // Initialize the Index
+ lzma_index_end(coder->index, allocator);
+ coder->index = lzma_index_init(allocator);
+ if (coder->index == NULL)
+ return LZMA_MEM_ERROR;
+
+ // Encode the Stream Header
+ lzma_stream_flags stream_flags = {
+ .version = 0,
+ .check = check,
+ };
+ return_if_error(lzma_stream_header_encode(
+ &stream_flags, coder->buffer));
+
+ coder->buffer_pos = 0;
+ coder->buffer_size = LZMA_STREAM_HEADER_SIZE;
+
+ // Initialize the Block encoder. This way we detect unsupported
+ // filter chains when initializing the Stream encoder instead of
+ // giving an error after Stream Header has already been written out.
+ return stream_encoder_update(coder, allocator, filters, NULL);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_encoder(lzma_stream *strm,
+ const lzma_filter *filters, lzma_check check)
+{
+ lzma_next_strm_init(stream_encoder_init, strm, filters, check);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+ strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FULL_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FULL_BARRIER] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_encoder_mt.c b/src/liblzma/common/stream_encoder_mt.c
new file mode 100644
index 0000000..f64de9b
--- /dev/null
+++ b/src/liblzma/common/stream_encoder_mt.c
@@ -0,0 +1,1283 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_encoder_mt.c
+/// \brief Multithreaded .xz Stream encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_encoder.h"
+#include "easy_preset.h"
+#include "block_encoder.h"
+#include "block_buffer_encoder.h"
+#include "index_encoder.h"
+#include "outqueue.h"
+
+
+/// Maximum supported block size. This makes it simpler to prevent integer
+/// overflows if we are given unusually large block size.
+#define BLOCK_SIZE_MAX (UINT64_MAX / LZMA_THREADS_MAX)
+
+
+typedef enum {
+ /// Waiting for work.
+ THR_IDLE,
+
+ /// Encoding is in progress.
+ THR_RUN,
+
+ /// Encoding is in progress but no more input data will
+ /// be read.
+ THR_FINISH,
+
+ /// The main thread wants the thread to stop whatever it was doing
+ /// but not exit.
+ THR_STOP,
+
+ /// The main thread wants the thread to exit. We could use
+ /// cancellation but since there's stopped anyway, this is lazier.
+ THR_EXIT,
+
+} worker_state;
+
+typedef struct lzma_stream_coder_s lzma_stream_coder;
+
+typedef struct worker_thread_s worker_thread;
+struct worker_thread_s {
+ worker_state state;
+
+ /// Input buffer of coder->block_size bytes. The main thread will
+ /// put new input into this and update in_size accordingly. Once
+ /// no more input is coming, state will be set to THR_FINISH.
+ uint8_t *in;
+
+ /// Amount of data available in the input buffer. This is modified
+ /// only by the main thread.
+ size_t in_size;
+
+ /// Output buffer for this thread. This is set by the main
+ /// thread every time a new Block is started with this thread
+ /// structure.
+ lzma_outbuf *outbuf;
+
+ /// Pointer to the main structure is needed when putting this
+ /// thread back to the stack of free threads.
+ lzma_stream_coder *coder;
+
+ /// The allocator is set by the main thread. Since a copy of the
+ /// pointer is kept here, the application must not change the
+ /// allocator before calling lzma_end().
+ const lzma_allocator *allocator;
+
+ /// Amount of uncompressed data that has already been compressed.
+ uint64_t progress_in;
+
+ /// Amount of compressed data that is ready.
+ uint64_t progress_out;
+
+ /// Block encoder
+ lzma_next_coder block_encoder;
+
+ /// Compression options for this Block
+ lzma_block block_options;
+
+ /// Filter chain for this thread. By copying the filters array
+ /// to each thread it is possible to change the filter chain
+ /// between Blocks using lzma_filters_update().
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+ /// Next structure in the stack of free worker threads.
+ worker_thread *next;
+
+ mythread_mutex mutex;
+ mythread_cond cond;
+
+ /// The ID of this thread is used to join the thread
+ /// when it's not needed anymore.
+ mythread thread_id;
+};
+
+
+struct lzma_stream_coder_s {
+ enum {
+ SEQ_STREAM_HEADER,
+ SEQ_BLOCK,
+ SEQ_INDEX,
+ SEQ_STREAM_FOOTER,
+ } sequence;
+
+ /// Start a new Block every block_size bytes of input unless
+ /// LZMA_FULL_FLUSH or LZMA_FULL_BARRIER is used earlier.
+ size_t block_size;
+
+ /// The filter chain to use for the next Block.
+ /// This can be updated using lzma_filters_update()
+ /// after LZMA_FULL_BARRIER or LZMA_FULL_FLUSH.
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+ /// A copy of filters[] will be put here when attempting to get
+ /// a new worker thread. This will be copied to a worker thread
+ /// when a thread becomes free and then this cache is marked as
+ /// empty by setting [0].id = LZMA_VLI_UNKNOWN. Without this cache
+ /// the filter options from filters[] would get uselessly copied
+ /// multiple times (allocated and freed) when waiting for a new free
+ /// worker thread.
+ ///
+ /// This is freed if filters[] is updated via lzma_filters_update().
+ lzma_filter filters_cache[LZMA_FILTERS_MAX + 1];
+
+
+ /// Index to hold sizes of the Blocks
+ lzma_index *index;
+
+ /// Index encoder
+ lzma_next_coder index_encoder;
+
+
+ /// Stream Flags for encoding the Stream Header and Stream Footer.
+ lzma_stream_flags stream_flags;
+
+ /// Buffer to hold Stream Header and Stream Footer.
+ uint8_t header[LZMA_STREAM_HEADER_SIZE];
+
+ /// Read position in header[]
+ size_t header_pos;
+
+
+ /// Output buffer queue for compressed data
+ lzma_outq outq;
+
+ /// How much memory to allocate for each lzma_outbuf.buf
+ size_t outbuf_alloc_size;
+
+
+ /// Maximum wait time if cannot use all the input and cannot
+ /// fill the output buffer. This is in milliseconds.
+ uint32_t timeout;
+
+
+ /// Error code from a worker thread
+ lzma_ret thread_error;
+
+ /// Array of allocated thread-specific structures
+ worker_thread *threads;
+
+ /// Number of structures in "threads" above. This is also the
+ /// number of threads that will be created at maximum.
+ uint32_t threads_max;
+
+ /// Number of thread structures that have been initialized, and
+ /// thus the number of worker threads actually created so far.
+ uint32_t threads_initialized;
+
+ /// Stack of free threads. When a thread finishes, it puts itself
+ /// back into this stack. This starts as empty because threads
+ /// are created only when actually needed.
+ worker_thread *threads_free;
+
+ /// The most recent worker thread to which the main thread writes
+ /// the new input from the application.
+ worker_thread *thr;
+
+
+ /// Amount of uncompressed data in Blocks that have already
+ /// been finished.
+ uint64_t progress_in;
+
+ /// Amount of compressed data in Stream Header + Blocks that
+ /// have already been finished.
+ uint64_t progress_out;
+
+
+ mythread_mutex mutex;
+ mythread_cond cond;
+};
+
+
+/// Tell the main thread that something has gone wrong.
+static void
+worker_error(worker_thread *thr, lzma_ret ret)
+{
+ assert(ret != LZMA_OK);
+ assert(ret != LZMA_STREAM_END);
+
+ mythread_sync(thr->coder->mutex) {
+ if (thr->coder->thread_error == LZMA_OK)
+ thr->coder->thread_error = ret;
+
+ mythread_cond_signal(&thr->coder->cond);
+ }
+
+ return;
+}
+
+
+static worker_state
+worker_encode(worker_thread *thr, size_t *out_pos, worker_state state)
+{
+ assert(thr->progress_in == 0);
+ assert(thr->progress_out == 0);
+
+ // Set the Block options.
+ thr->block_options = (lzma_block){
+ .version = 0,
+ .check = thr->coder->stream_flags.check,
+ .compressed_size = thr->outbuf->allocated,
+ .uncompressed_size = thr->coder->block_size,
+ .filters = thr->filters,
+ };
+
+ // Calculate maximum size of the Block Header. This amount is
+ // reserved in the beginning of the buffer so that Block Header
+ // along with Compressed Size and Uncompressed Size can be
+ // written there.
+ lzma_ret ret = lzma_block_header_size(&thr->block_options);
+ if (ret != LZMA_OK) {
+ worker_error(thr, ret);
+ return THR_STOP;
+ }
+
+ // Initialize the Block encoder.
+ ret = lzma_block_encoder_init(&thr->block_encoder,
+ thr->allocator, &thr->block_options);
+ if (ret != LZMA_OK) {
+ worker_error(thr, ret);
+ return THR_STOP;
+ }
+
+ size_t in_pos = 0;
+ size_t in_size = 0;
+
+ *out_pos = thr->block_options.header_size;
+ const size_t out_size = thr->outbuf->allocated;
+
+ do {
+ mythread_sync(thr->mutex) {
+ // Store in_pos and *out_pos into *thr so that
+ // an application may read them via
+ // lzma_get_progress() to get progress information.
+ //
+ // NOTE: These aren't updated when the encoding
+ // finishes. Instead, the final values are taken
+ // later from thr->outbuf.
+ thr->progress_in = in_pos;
+ thr->progress_out = *out_pos;
+
+ while (in_size == thr->in_size
+ && thr->state == THR_RUN)
+ mythread_cond_wait(&thr->cond, &thr->mutex);
+
+ state = thr->state;
+ in_size = thr->in_size;
+ }
+
+ // Return if we were asked to stop or exit.
+ if (state >= THR_STOP)
+ return state;
+
+ lzma_action action = state == THR_FINISH
+ ? LZMA_FINISH : LZMA_RUN;
+
+ // Limit the amount of input given to the Block encoder
+ // at once. This way this thread can react fairly quickly
+ // if the main thread wants us to stop or exit.
+ static const size_t in_chunk_max = 16384;
+ size_t in_limit = in_size;
+ if (in_size - in_pos > in_chunk_max) {
+ in_limit = in_pos + in_chunk_max;
+ action = LZMA_RUN;
+ }
+
+ ret = thr->block_encoder.code(
+ thr->block_encoder.coder, thr->allocator,
+ thr->in, &in_pos, in_limit, thr->outbuf->buf,
+ out_pos, out_size, action);
+ } while (ret == LZMA_OK && *out_pos < out_size);
+
+ switch (ret) {
+ case LZMA_STREAM_END:
+ assert(state == THR_FINISH);
+
+ // Encode the Block Header. By doing it after
+ // the compression, we can store the Compressed Size
+ // and Uncompressed Size fields.
+ ret = lzma_block_header_encode(&thr->block_options,
+ thr->outbuf->buf);
+ if (ret != LZMA_OK) {
+ worker_error(thr, ret);
+ return THR_STOP;
+ }
+
+ break;
+
+ case LZMA_OK:
+ // The data was incompressible. Encode it using uncompressed
+ // LZMA2 chunks.
+ //
+ // First wait that we have gotten all the input.
+ mythread_sync(thr->mutex) {
+ while (thr->state == THR_RUN)
+ mythread_cond_wait(&thr->cond, &thr->mutex);
+
+ state = thr->state;
+ in_size = thr->in_size;
+ }
+
+ if (state >= THR_STOP)
+ return state;
+
+ // Do the encoding. This takes care of the Block Header too.
+ *out_pos = 0;
+ ret = lzma_block_uncomp_encode(&thr->block_options,
+ thr->in, in_size, thr->outbuf->buf,
+ out_pos, out_size);
+
+ // It shouldn't fail.
+ if (ret != LZMA_OK) {
+ worker_error(thr, LZMA_PROG_ERROR);
+ return THR_STOP;
+ }
+
+ break;
+
+ default:
+ worker_error(thr, ret);
+ return THR_STOP;
+ }
+
+ // Set the size information that will be read by the main thread
+ // to write the Index field.
+ thr->outbuf->unpadded_size
+ = lzma_block_unpadded_size(&thr->block_options);
+ assert(thr->outbuf->unpadded_size != 0);
+ thr->outbuf->uncompressed_size = thr->block_options.uncompressed_size;
+
+ return THR_FINISH;
+}
+
+
+static MYTHREAD_RET_TYPE
+worker_start(void *thr_ptr)
+{
+ worker_thread *thr = thr_ptr;
+ worker_state state = THR_IDLE; // Init to silence a warning
+
+ while (true) {
+ // Wait for work.
+ mythread_sync(thr->mutex) {
+ while (true) {
+ // The thread is already idle so if we are
+ // requested to stop, just set the state.
+ if (thr->state == THR_STOP) {
+ thr->state = THR_IDLE;
+ mythread_cond_signal(&thr->cond);
+ }
+
+ state = thr->state;
+ if (state != THR_IDLE)
+ break;
+
+ mythread_cond_wait(&thr->cond, &thr->mutex);
+ }
+ }
+
+ size_t out_pos = 0;
+
+ assert(state != THR_IDLE);
+ assert(state != THR_STOP);
+
+ if (state <= THR_FINISH)
+ state = worker_encode(thr, &out_pos, state);
+
+ if (state == THR_EXIT)
+ break;
+
+ // Mark the thread as idle unless the main thread has
+ // told us to exit. Signal is needed for the case
+ // where the main thread is waiting for the threads to stop.
+ mythread_sync(thr->mutex) {
+ if (thr->state != THR_EXIT) {
+ thr->state = THR_IDLE;
+ mythread_cond_signal(&thr->cond);
+ }
+ }
+
+ mythread_sync(thr->coder->mutex) {
+ // If no errors occurred, make the encoded data
+ // available to be copied out.
+ if (state == THR_FINISH) {
+ thr->outbuf->pos = out_pos;
+ thr->outbuf->finished = true;
+ }
+
+ // Update the main progress info.
+ thr->coder->progress_in
+ += thr->outbuf->uncompressed_size;
+ thr->coder->progress_out += out_pos;
+ thr->progress_in = 0;
+ thr->progress_out = 0;
+
+ // Return this thread to the stack of free threads.
+ thr->next = thr->coder->threads_free;
+ thr->coder->threads_free = thr;
+
+ mythread_cond_signal(&thr->coder->cond);
+ }
+ }
+
+ // Exiting, free the resources.
+ lzma_filters_free(thr->filters, thr->allocator);
+
+ mythread_mutex_destroy(&thr->mutex);
+ mythread_cond_destroy(&thr->cond);
+
+ lzma_next_end(&thr->block_encoder, thr->allocator);
+ lzma_free(thr->in, thr->allocator);
+ return MYTHREAD_RET_VALUE;
+}
+
+
+/// Make the threads stop but not exit. Optionally wait for them to stop.
+static void
+threads_stop(lzma_stream_coder *coder, bool wait_for_threads)
+{
+ // Tell the threads to stop.
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ coder->threads[i].state = THR_STOP;
+ mythread_cond_signal(&coder->threads[i].cond);
+ }
+ }
+
+ if (!wait_for_threads)
+ return;
+
+ // Wait for the threads to settle in the idle state.
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ while (coder->threads[i].state != THR_IDLE)
+ mythread_cond_wait(&coder->threads[i].cond,
+ &coder->threads[i].mutex);
+ }
+ }
+
+ return;
+}
+
+
+/// Stop the threads and free the resources associated with them.
+/// Wait until the threads have exited.
+static void
+threads_end(lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ coder->threads[i].state = THR_EXIT;
+ mythread_cond_signal(&coder->threads[i].cond);
+ }
+ }
+
+ for (uint32_t i = 0; i < coder->threads_initialized; ++i) {
+ int ret = mythread_join(coder->threads[i].thread_id);
+ assert(ret == 0);
+ (void)ret;
+ }
+
+ lzma_free(coder->threads, allocator);
+ return;
+}
+
+
+/// Initialize a new worker_thread structure and create a new thread.
+static lzma_ret
+initialize_new_thread(lzma_stream_coder *coder,
+ const lzma_allocator *allocator)
+{
+ worker_thread *thr = &coder->threads[coder->threads_initialized];
+
+ thr->in = lzma_alloc(coder->block_size, allocator);
+ if (thr->in == NULL)
+ return LZMA_MEM_ERROR;
+
+ if (mythread_mutex_init(&thr->mutex))
+ goto error_mutex;
+
+ if (mythread_cond_init(&thr->cond))
+ goto error_cond;
+
+ thr->state = THR_IDLE;
+ thr->allocator = allocator;
+ thr->coder = coder;
+ thr->progress_in = 0;
+ thr->progress_out = 0;
+ thr->block_encoder = LZMA_NEXT_CODER_INIT;
+ thr->filters[0].id = LZMA_VLI_UNKNOWN;
+
+ if (mythread_create(&thr->thread_id, &worker_start, thr))
+ goto error_thread;
+
+ ++coder->threads_initialized;
+ coder->thr = thr;
+
+ return LZMA_OK;
+
+error_thread:
+ mythread_cond_destroy(&thr->cond);
+
+error_cond:
+ mythread_mutex_destroy(&thr->mutex);
+
+error_mutex:
+ lzma_free(thr->in, allocator);
+ return LZMA_MEM_ERROR;
+}
+
+
+static lzma_ret
+get_thread(lzma_stream_coder *coder, const lzma_allocator *allocator)
+{
+ // If there are no free output subqueues, there is no
+ // point to try getting a thread.
+ if (!lzma_outq_has_buf(&coder->outq))
+ return LZMA_OK;
+
+ // That's also true if we cannot allocate memory for the output
+ // buffer in the output queue.
+ return_if_error(lzma_outq_prealloc_buf(&coder->outq, allocator,
+ coder->outbuf_alloc_size));
+
+ // Make a thread-specific copy of the filter chain. Put it in
+ // the cache array first so that if we cannot get a new thread yet,
+ // the allocation is ready when we try again.
+ if (coder->filters_cache[0].id == LZMA_VLI_UNKNOWN)
+ return_if_error(lzma_filters_copy(
+ coder->filters, coder->filters_cache, allocator));
+
+ // If there is a free structure on the stack, use it.
+ mythread_sync(coder->mutex) {
+ if (coder->threads_free != NULL) {
+ coder->thr = coder->threads_free;
+ coder->threads_free = coder->threads_free->next;
+ }
+ }
+
+ if (coder->thr == NULL) {
+ // If there are no uninitialized structures left, return.
+ if (coder->threads_initialized == coder->threads_max)
+ return LZMA_OK;
+
+ // Initialize a new thread.
+ return_if_error(initialize_new_thread(coder, allocator));
+ }
+
+ // Reset the parts of the thread state that have to be done
+ // in the main thread.
+ mythread_sync(coder->thr->mutex) {
+ coder->thr->state = THR_RUN;
+ coder->thr->in_size = 0;
+ coder->thr->outbuf = lzma_outq_get_buf(&coder->outq, NULL);
+
+ // Free the old thread-specific filter options and replace
+ // them with the already-allocated new options from
+ // coder->filters_cache[]. Then mark the cache as empty.
+ lzma_filters_free(coder->thr->filters, allocator);
+ memcpy(coder->thr->filters, coder->filters_cache,
+ sizeof(coder->filters_cache));
+ coder->filters_cache[0].id = LZMA_VLI_UNKNOWN;
+
+ mythread_cond_signal(&coder->thr->cond);
+ }
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+stream_encode_in(lzma_stream_coder *coder, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, lzma_action action)
+{
+ while (*in_pos < in_size
+ || (coder->thr != NULL && action != LZMA_RUN)) {
+ if (coder->thr == NULL) {
+ // Get a new thread.
+ const lzma_ret ret = get_thread(coder, allocator);
+ if (coder->thr == NULL)
+ return ret;
+ }
+
+ // Copy the input data to thread's buffer.
+ size_t thr_in_size = coder->thr->in_size;
+ lzma_bufcpy(in, in_pos, in_size, coder->thr->in,
+ &thr_in_size, coder->block_size);
+
+ // Tell the Block encoder to finish if
+ // - it has got block_size bytes of input; or
+ // - all input was used and LZMA_FINISH, LZMA_FULL_FLUSH,
+ // or LZMA_FULL_BARRIER was used.
+ //
+ // TODO: LZMA_SYNC_FLUSH and LZMA_SYNC_BARRIER.
+ const bool finish = thr_in_size == coder->block_size
+ || (*in_pos == in_size && action != LZMA_RUN);
+
+ bool block_error = false;
+
+ mythread_sync(coder->thr->mutex) {
+ if (coder->thr->state == THR_IDLE) {
+ // Something has gone wrong with the Block
+ // encoder. It has set coder->thread_error
+ // which we will read a few lines later.
+ block_error = true;
+ } else {
+ // Tell the Block encoder its new amount
+ // of input and update the state if needed.
+ coder->thr->in_size = thr_in_size;
+
+ if (finish)
+ coder->thr->state = THR_FINISH;
+
+ mythread_cond_signal(&coder->thr->cond);
+ }
+ }
+
+ if (block_error) {
+ lzma_ret ret = LZMA_OK; // Init to silence a warning.
+
+ mythread_sync(coder->mutex) {
+ ret = coder->thread_error;
+ }
+
+ return ret;
+ }
+
+ if (finish)
+ coder->thr = NULL;
+ }
+
+ return LZMA_OK;
+}
+
+
+/// Wait until more input can be consumed, more output can be read, or
+/// an optional timeout is reached.
+static bool
+wait_for_work(lzma_stream_coder *coder, mythread_condtime *wait_abs,
+ bool *has_blocked, bool has_input)
+{
+ if (coder->timeout != 0 && !*has_blocked) {
+ // Every time when stream_encode_mt() is called via
+ // lzma_code(), *has_blocked starts as false. We set it
+ // to true here and calculate the absolute time when
+ // we must return if there's nothing to do.
+ //
+ // This way if we block multiple times for short moments
+ // less than "timeout" milliseconds, we will return once
+ // "timeout" amount of time has passed since the *first*
+ // blocking occurred. If the absolute time was calculated
+ // again every time we block, "timeout" would effectively
+ // be meaningless if we never consecutively block longer
+ // than "timeout" ms.
+ *has_blocked = true;
+ mythread_condtime_set(wait_abs, &coder->cond, coder->timeout);
+ }
+
+ bool timed_out = false;
+
+ mythread_sync(coder->mutex) {
+ // There are four things that we wait. If one of them
+ // becomes possible, we return.
+ // - If there is input left, we need to get a free
+ // worker thread and an output buffer for it.
+ // - Data ready to be read from the output queue.
+ // - A worker thread indicates an error.
+ // - Time out occurs.
+ while ((!has_input || coder->threads_free == NULL
+ || !lzma_outq_has_buf(&coder->outq))
+ && !lzma_outq_is_readable(&coder->outq)
+ && coder->thread_error == LZMA_OK
+ && !timed_out) {
+ if (coder->timeout != 0)
+ timed_out = mythread_cond_timedwait(
+ &coder->cond, &coder->mutex,
+ wait_abs) != 0;
+ else
+ mythread_cond_wait(&coder->cond,
+ &coder->mutex);
+ }
+ }
+
+ return timed_out;
+}
+
+
+static lzma_ret
+stream_encode_mt(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ switch (coder->sequence) {
+ case SEQ_STREAM_HEADER:
+ lzma_bufcpy(coder->header, &coder->header_pos,
+ sizeof(coder->header),
+ out, out_pos, out_size);
+ if (coder->header_pos < sizeof(coder->header))
+ return LZMA_OK;
+
+ coder->header_pos = 0;
+ coder->sequence = SEQ_BLOCK;
+
+ // Fall through
+
+ case SEQ_BLOCK: {
+ // Initialized to silence warnings.
+ lzma_vli unpadded_size = 0;
+ lzma_vli uncompressed_size = 0;
+ lzma_ret ret = LZMA_OK;
+
+ // These are for wait_for_work().
+ bool has_blocked = false;
+ mythread_condtime wait_abs = { 0 };
+
+ while (true) {
+ mythread_sync(coder->mutex) {
+ // Check for Block encoder errors.
+ ret = coder->thread_error;
+ if (ret != LZMA_OK) {
+ assert(ret != LZMA_STREAM_END);
+ break; // Break out of mythread_sync.
+ }
+
+ // Try to read compressed data to out[].
+ ret = lzma_outq_read(&coder->outq, allocator,
+ out, out_pos, out_size,
+ &unpadded_size,
+ &uncompressed_size);
+ }
+
+ if (ret == LZMA_STREAM_END) {
+ // End of Block. Add it to the Index.
+ ret = lzma_index_append(coder->index,
+ allocator, unpadded_size,
+ uncompressed_size);
+ if (ret != LZMA_OK) {
+ threads_stop(coder, false);
+ return ret;
+ }
+
+ // If we didn't fill the output buffer yet,
+ // try to read more data. Maybe the next
+ // outbuf has been finished already too.
+ if (*out_pos < out_size)
+ continue;
+ }
+
+ if (ret != LZMA_OK) {
+ // coder->thread_error was set.
+ threads_stop(coder, false);
+ return ret;
+ }
+
+ // Try to give uncompressed data to a worker thread.
+ ret = stream_encode_in(coder, allocator,
+ in, in_pos, in_size, action);
+ if (ret != LZMA_OK) {
+ threads_stop(coder, false);
+ return ret;
+ }
+
+ // See if we should wait or return.
+ //
+ // TODO: LZMA_SYNC_FLUSH and LZMA_SYNC_BARRIER.
+ if (*in_pos == in_size) {
+ // LZMA_RUN: More data is probably coming
+ // so return to let the caller fill the
+ // input buffer.
+ if (action == LZMA_RUN)
+ return LZMA_OK;
+
+ // LZMA_FULL_BARRIER: The same as with
+ // LZMA_RUN but tell the caller that the
+ // barrier was completed.
+ if (action == LZMA_FULL_BARRIER)
+ return LZMA_STREAM_END;
+
+ // Finishing or flushing isn't completed until
+ // all input data has been encoded and copied
+ // to the output buffer.
+ if (lzma_outq_is_empty(&coder->outq)) {
+ // LZMA_FINISH: Continue to encode
+ // the Index field.
+ if (action == LZMA_FINISH)
+ break;
+
+ // LZMA_FULL_FLUSH: Return to tell
+ // the caller that flushing was
+ // completed.
+ if (action == LZMA_FULL_FLUSH)
+ return LZMA_STREAM_END;
+ }
+ }
+
+ // Return if there is no output space left.
+ // This check must be done after testing the input
+ // buffer, because we might want to use a different
+ // return code.
+ if (*out_pos == out_size)
+ return LZMA_OK;
+
+ // Neither in nor out has been used completely.
+ // Wait until there's something we can do.
+ if (wait_for_work(coder, &wait_abs, &has_blocked,
+ *in_pos < in_size))
+ return LZMA_TIMED_OUT;
+ }
+
+ // All Blocks have been encoded and the threads have stopped.
+ // Prepare to encode the Index field.
+ return_if_error(lzma_index_encoder_init(
+ &coder->index_encoder, allocator,
+ coder->index));
+ coder->sequence = SEQ_INDEX;
+
+ // Update the progress info to take the Index and
+ // Stream Footer into account. Those are very fast to encode
+ // so in terms of progress information they can be thought
+ // to be ready to be copied out.
+ coder->progress_out += lzma_index_size(coder->index)
+ + LZMA_STREAM_HEADER_SIZE;
+ }
+
+ // Fall through
+
+ case SEQ_INDEX: {
+ // Call the Index encoder. It doesn't take any input, so
+ // those pointers can be NULL.
+ const lzma_ret ret = coder->index_encoder.code(
+ coder->index_encoder.coder, allocator,
+ NULL, NULL, 0,
+ out, out_pos, out_size, LZMA_RUN);
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // Encode the Stream Footer into coder->buffer.
+ coder->stream_flags.backward_size
+ = lzma_index_size(coder->index);
+ if (lzma_stream_footer_encode(&coder->stream_flags,
+ coder->header) != LZMA_OK)
+ return LZMA_PROG_ERROR;
+
+ coder->sequence = SEQ_STREAM_FOOTER;
+ }
+
+ // Fall through
+
+ case SEQ_STREAM_FOOTER:
+ lzma_bufcpy(coder->header, &coder->header_pos,
+ sizeof(coder->header),
+ out, out_pos, out_size);
+ return coder->header_pos < sizeof(coder->header)
+ ? LZMA_OK : LZMA_STREAM_END;
+ }
+
+ assert(0);
+ return LZMA_PROG_ERROR;
+}
+
+
+static void
+stream_encoder_mt_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ // Threads must be killed before the output queue can be freed.
+ threads_end(coder, allocator);
+ lzma_outq_end(&coder->outq, allocator);
+
+ lzma_filters_free(coder->filters, allocator);
+ lzma_filters_free(coder->filters_cache, allocator);
+
+ lzma_next_end(&coder->index_encoder, allocator);
+ lzma_index_end(coder->index, allocator);
+
+ mythread_cond_destroy(&coder->cond);
+ mythread_mutex_destroy(&coder->mutex);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+stream_encoder_mt_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters,
+ const lzma_filter *reversed_filters
+ lzma_attribute((__unused__)))
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ // Applications shouldn't attempt to change the options when
+ // we are already encoding the Index or Stream Footer.
+ if (coder->sequence > SEQ_BLOCK)
+ return LZMA_PROG_ERROR;
+
+ // For now the threaded encoder doesn't support changing
+ // the options in the middle of a Block.
+ if (coder->thr != NULL)
+ return LZMA_PROG_ERROR;
+
+ // Check if the filter chain seems mostly valid. See the comment
+ // in stream_encoder_mt_init().
+ if (lzma_raw_encoder_memusage(filters) == UINT64_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ // Make a copy to a temporary buffer first. This way the encoder
+ // state stays unchanged if an error occurs in lzma_filters_copy().
+ lzma_filter temp[LZMA_FILTERS_MAX + 1];
+ return_if_error(lzma_filters_copy(filters, temp, allocator));
+
+ // Free the options of the old chain as well as the cache.
+ lzma_filters_free(coder->filters, allocator);
+ lzma_filters_free(coder->filters_cache, allocator);
+
+ // Copy the new filter chain in place.
+ memcpy(coder->filters, temp, sizeof(temp));
+
+ return LZMA_OK;
+}
+
+
+/// Options handling for lzma_stream_encoder_mt_init() and
+/// lzma_stream_encoder_mt_memusage()
+static lzma_ret
+get_options(const lzma_mt *options, lzma_options_easy *opt_easy,
+ const lzma_filter **filters, uint64_t *block_size,
+ uint64_t *outbuf_size_max)
+{
+ // Validate some of the options.
+ if (options == NULL)
+ return LZMA_PROG_ERROR;
+
+ if (options->flags != 0 || options->threads == 0
+ || options->threads > LZMA_THREADS_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ if (options->filters != NULL) {
+ // Filter chain was given, use it as is.
+ *filters = options->filters;
+ } else {
+ // Use a preset.
+ if (lzma_easy_preset(opt_easy, options->preset))
+ return LZMA_OPTIONS_ERROR;
+
+ *filters = opt_easy->filters;
+ }
+
+ // Block size
+ if (options->block_size > 0) {
+ if (options->block_size > BLOCK_SIZE_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ *block_size = options->block_size;
+ } else {
+ // Determine the Block size from the filter chain.
+ *block_size = lzma_mt_block_size(*filters);
+ if (*block_size == 0)
+ return LZMA_OPTIONS_ERROR;
+
+ assert(*block_size <= BLOCK_SIZE_MAX);
+ }
+
+ // Calculate the maximum amount output that a single output buffer
+ // may need to hold. This is the same as the maximum total size of
+ // a Block.
+ *outbuf_size_max = lzma_block_buffer_bound64(*block_size);
+ if (*outbuf_size_max == 0)
+ return LZMA_MEM_ERROR;
+
+ return LZMA_OK;
+}
+
+
+static void
+get_progress(void *coder_ptr, uint64_t *progress_in, uint64_t *progress_out)
+{
+ lzma_stream_coder *coder = coder_ptr;
+
+ // Lock coder->mutex to prevent finishing threads from moving their
+ // progress info from the worker_thread structure to lzma_stream_coder.
+ mythread_sync(coder->mutex) {
+ *progress_in = coder->progress_in;
+ *progress_out = coder->progress_out;
+
+ for (size_t i = 0; i < coder->threads_initialized; ++i) {
+ mythread_sync(coder->threads[i].mutex) {
+ *progress_in += coder->threads[i].progress_in;
+ *progress_out += coder->threads[i]
+ .progress_out;
+ }
+ }
+ }
+
+ return;
+}
+
+
+static lzma_ret
+stream_encoder_mt_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_mt *options)
+{
+ lzma_next_coder_init(&stream_encoder_mt_init, next, allocator);
+
+ // Get the filter chain.
+ lzma_options_easy easy;
+ const lzma_filter *filters;
+ uint64_t block_size;
+ uint64_t outbuf_size_max;
+ return_if_error(get_options(options, &easy, &filters,
+ &block_size, &outbuf_size_max));
+
+#if SIZE_MAX < UINT64_MAX
+ if (block_size > SIZE_MAX || outbuf_size_max > SIZE_MAX)
+ return LZMA_MEM_ERROR;
+#endif
+
+ // Validate the filter chain so that we can give an error in this
+ // function instead of delaying it to the first call to lzma_code().
+ // The memory usage calculation verifies the filter chain as
+ // a side effect so we take advantage of that. It's not a perfect
+ // check though as raw encoder allows LZMA1 too but such problems
+ // will be caught eventually with Block Header encoder.
+ if (lzma_raw_encoder_memusage(filters) == UINT64_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ // Validate the Check ID.
+ if ((unsigned int)(options->check) > LZMA_CHECK_ID_MAX)
+ return LZMA_PROG_ERROR;
+
+ if (!lzma_check_is_supported(options->check))
+ return LZMA_UNSUPPORTED_CHECK;
+
+ // Allocate and initialize the base structure if needed.
+ lzma_stream_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_stream_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+
+ // For the mutex and condition variable initializations
+ // the error handling has to be done here because
+ // stream_encoder_mt_end() doesn't know if they have
+ // already been initialized or not.
+ if (mythread_mutex_init(&coder->mutex)) {
+ lzma_free(coder, allocator);
+ next->coder = NULL;
+ return LZMA_MEM_ERROR;
+ }
+
+ if (mythread_cond_init(&coder->cond)) {
+ mythread_mutex_destroy(&coder->mutex);
+ lzma_free(coder, allocator);
+ next->coder = NULL;
+ return LZMA_MEM_ERROR;
+ }
+
+ next->code = &stream_encode_mt;
+ next->end = &stream_encoder_mt_end;
+ next->get_progress = &get_progress;
+ next->update = &stream_encoder_mt_update;
+
+ coder->filters[0].id = LZMA_VLI_UNKNOWN;
+ coder->filters_cache[0].id = LZMA_VLI_UNKNOWN;
+ coder->index_encoder = LZMA_NEXT_CODER_INIT;
+ coder->index = NULL;
+ memzero(&coder->outq, sizeof(coder->outq));
+ coder->threads = NULL;
+ coder->threads_max = 0;
+ coder->threads_initialized = 0;
+ }
+
+ // Basic initializations
+ coder->sequence = SEQ_STREAM_HEADER;
+ coder->block_size = (size_t)(block_size);
+ coder->outbuf_alloc_size = (size_t)(outbuf_size_max);
+ coder->thread_error = LZMA_OK;
+ coder->thr = NULL;
+
+ // Allocate the thread-specific base structures.
+ assert(options->threads > 0);
+ if (coder->threads_max != options->threads) {
+ threads_end(coder, allocator);
+
+ coder->threads = NULL;
+ coder->threads_max = 0;
+
+ coder->threads_initialized = 0;
+ coder->threads_free = NULL;
+
+ coder->threads = lzma_alloc(
+ options->threads * sizeof(worker_thread),
+ allocator);
+ if (coder->threads == NULL)
+ return LZMA_MEM_ERROR;
+
+ coder->threads_max = options->threads;
+ } else {
+ // Reuse the old structures and threads. Tell the running
+ // threads to stop and wait until they have stopped.
+ threads_stop(coder, true);
+ }
+
+ // Output queue
+ return_if_error(lzma_outq_init(&coder->outq, allocator,
+ options->threads));
+
+ // Timeout
+ coder->timeout = options->timeout;
+
+ // Free the old filter chain and the cache.
+ lzma_filters_free(coder->filters, allocator);
+ lzma_filters_free(coder->filters_cache, allocator);
+
+ // Copy the new filter chain.
+ return_if_error(lzma_filters_copy(
+ filters, coder->filters, allocator));
+
+ // Index
+ lzma_index_end(coder->index, allocator);
+ coder->index = lzma_index_init(allocator);
+ if (coder->index == NULL)
+ return LZMA_MEM_ERROR;
+
+ // Stream Header
+ coder->stream_flags.version = 0;
+ coder->stream_flags.check = options->check;
+ return_if_error(lzma_stream_header_encode(
+ &coder->stream_flags, coder->header));
+
+ coder->header_pos = 0;
+
+ // Progress info
+ coder->progress_in = 0;
+ coder->progress_out = LZMA_STREAM_HEADER_SIZE;
+
+ return LZMA_OK;
+}
+
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+// These are for compatibility with binaries linked against liblzma that
+// has been patched with xz-5.2.2-compat-libs.patch from RHEL/CentOS 7.
+// Actually that patch didn't create lzma_stream_encoder_mt@XZ_5.2.2
+// but it has been added here anyway since someone might misread the
+// RHEL patch and think both @XZ_5.1.2alpha and @XZ_5.2.2 exist.
+LZMA_SYMVER_API("lzma_stream_encoder_mt@XZ_5.1.2alpha",
+ lzma_ret, lzma_stream_encoder_mt_512a)(
+ lzma_stream *strm, const lzma_mt *options)
+ lzma_nothrow lzma_attr_warn_unused_result
+ __attribute__((__alias__("lzma_stream_encoder_mt_52")));
+
+LZMA_SYMVER_API("lzma_stream_encoder_mt@XZ_5.2.2",
+ lzma_ret, lzma_stream_encoder_mt_522)(
+ lzma_stream *strm, const lzma_mt *options)
+ lzma_nothrow lzma_attr_warn_unused_result
+ __attribute__((__alias__("lzma_stream_encoder_mt_52")));
+
+LZMA_SYMVER_API("lzma_stream_encoder_mt@@XZ_5.2",
+ lzma_ret, lzma_stream_encoder_mt_52)(
+ lzma_stream *strm, const lzma_mt *options)
+ lzma_nothrow lzma_attr_warn_unused_result;
+
+#define lzma_stream_encoder_mt lzma_stream_encoder_mt_52
+#endif
+extern LZMA_API(lzma_ret)
+lzma_stream_encoder_mt(lzma_stream *strm, const lzma_mt *options)
+{
+ lzma_next_strm_init(stream_encoder_mt_init, strm, options);
+
+ strm->internal->supported_actions[LZMA_RUN] = true;
+// strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FULL_FLUSH] = true;
+ strm->internal->supported_actions[LZMA_FULL_BARRIER] = true;
+ strm->internal->supported_actions[LZMA_FINISH] = true;
+
+ return LZMA_OK;
+}
+
+
+#ifdef HAVE_SYMBOL_VERSIONS_LINUX
+LZMA_SYMVER_API("lzma_stream_encoder_mt_memusage@XZ_5.1.2alpha",
+ uint64_t, lzma_stream_encoder_mt_memusage_512a)(
+ const lzma_mt *options) lzma_nothrow lzma_attr_pure
+ __attribute__((__alias__("lzma_stream_encoder_mt_memusage_52")));
+
+LZMA_SYMVER_API("lzma_stream_encoder_mt_memusage@XZ_5.2.2",
+ uint64_t, lzma_stream_encoder_mt_memusage_522)(
+ const lzma_mt *options) lzma_nothrow lzma_attr_pure
+ __attribute__((__alias__("lzma_stream_encoder_mt_memusage_52")));
+
+LZMA_SYMVER_API("lzma_stream_encoder_mt_memusage@@XZ_5.2",
+ uint64_t, lzma_stream_encoder_mt_memusage_52)(
+ const lzma_mt *options) lzma_nothrow lzma_attr_pure;
+
+#define lzma_stream_encoder_mt_memusage lzma_stream_encoder_mt_memusage_52
+#endif
+// This function name is a monster but it's consistent with the older
+// monster names. :-( 31 chars is the max that C99 requires so in that
+// sense it's not too long. ;-)
+extern LZMA_API(uint64_t)
+lzma_stream_encoder_mt_memusage(const lzma_mt *options)
+{
+ lzma_options_easy easy;
+ const lzma_filter *filters;
+ uint64_t block_size;
+ uint64_t outbuf_size_max;
+
+ if (get_options(options, &easy, &filters, &block_size,
+ &outbuf_size_max) != LZMA_OK)
+ return UINT64_MAX;
+
+ // Memory usage of the input buffers
+ const uint64_t inbuf_memusage = options->threads * block_size;
+
+ // Memory usage of the filter encoders
+ uint64_t filters_memusage = lzma_raw_encoder_memusage(filters);
+ if (filters_memusage == UINT64_MAX)
+ return UINT64_MAX;
+
+ filters_memusage *= options->threads;
+
+ // Memory usage of the output queue
+ const uint64_t outq_memusage = lzma_outq_memusage(
+ outbuf_size_max, options->threads);
+ if (outq_memusage == UINT64_MAX)
+ return UINT64_MAX;
+
+ // Sum them with overflow checking.
+ uint64_t total_memusage = LZMA_MEMUSAGE_BASE
+ + sizeof(lzma_stream_coder)
+ + options->threads * sizeof(worker_thread);
+
+ if (UINT64_MAX - total_memusage < inbuf_memusage)
+ return UINT64_MAX;
+
+ total_memusage += inbuf_memusage;
+
+ if (UINT64_MAX - total_memusage < filters_memusage)
+ return UINT64_MAX;
+
+ total_memusage += filters_memusage;
+
+ if (UINT64_MAX - total_memusage < outq_memusage)
+ return UINT64_MAX;
+
+ return total_memusage + outq_memusage;
+}
diff --git a/src/liblzma/common/stream_flags_common.c b/src/liblzma/common/stream_flags_common.c
new file mode 100644
index 0000000..fbe8eb8
--- /dev/null
+++ b/src/liblzma/common/stream_flags_common.c
@@ -0,0 +1,47 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_flags_common.c
+/// \brief Common stuff for Stream flags coders
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_flags_common.h"
+
+
+const uint8_t lzma_header_magic[6] = { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
+const uint8_t lzma_footer_magic[2] = { 0x59, 0x5A };
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_flags_compare(
+ const lzma_stream_flags *a, const lzma_stream_flags *b)
+{
+ // We can compare only version 0 structures.
+ if (a->version != 0 || b->version != 0)
+ return LZMA_OPTIONS_ERROR;
+
+ // Check type
+ if ((unsigned int)(a->check) > LZMA_CHECK_ID_MAX
+ || (unsigned int)(b->check) > LZMA_CHECK_ID_MAX)
+ return LZMA_PROG_ERROR;
+
+ if (a->check != b->check)
+ return LZMA_DATA_ERROR;
+
+ // Backward Sizes are compared only if they are known in both.
+ if (a->backward_size != LZMA_VLI_UNKNOWN
+ && b->backward_size != LZMA_VLI_UNKNOWN) {
+ if (!is_backward_size_valid(a) || !is_backward_size_valid(b))
+ return LZMA_PROG_ERROR;
+
+ if (a->backward_size != b->backward_size)
+ return LZMA_DATA_ERROR;
+ }
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_flags_common.h b/src/liblzma/common/stream_flags_common.h
new file mode 100644
index 0000000..84e96ba
--- /dev/null
+++ b/src/liblzma/common/stream_flags_common.h
@@ -0,0 +1,36 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_flags_common.h
+/// \brief Common stuff for Stream flags coders
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_STREAM_FLAGS_COMMON_H
+#define LZMA_STREAM_FLAGS_COMMON_H
+
+#include "common.h"
+
+/// Size of the Stream Flags field
+#define LZMA_STREAM_FLAGS_SIZE 2
+
+lzma_attr_visibility_hidden
+extern const uint8_t lzma_header_magic[6];
+
+lzma_attr_visibility_hidden
+extern const uint8_t lzma_footer_magic[2];
+
+
+static inline bool
+is_backward_size_valid(const lzma_stream_flags *options)
+{
+ return options->backward_size >= LZMA_BACKWARD_SIZE_MIN
+ && options->backward_size <= LZMA_BACKWARD_SIZE_MAX
+ && (options->backward_size & 3) == 0;
+}
+
+#endif
diff --git a/src/liblzma/common/stream_flags_decoder.c b/src/liblzma/common/stream_flags_decoder.c
new file mode 100644
index 0000000..b8d263b
--- /dev/null
+++ b/src/liblzma/common/stream_flags_decoder.c
@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_flags_decoder.c
+/// \brief Decodes Stream Header and Stream Footer from .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_flags_common.h"
+
+
+static bool
+stream_flags_decode(lzma_stream_flags *options, const uint8_t *in)
+{
+ // Reserved bits must be unset.
+ if (in[0] != 0x00 || (in[1] & 0xF0))
+ return true;
+
+ options->version = 0;
+ options->check = in[1] & 0x0F;
+
+ return false;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_header_decode(lzma_stream_flags *options, const uint8_t *in)
+{
+ // Magic
+ if (memcmp(in, lzma_header_magic, sizeof(lzma_header_magic)) != 0)
+ return LZMA_FORMAT_ERROR;
+
+ // Verify the CRC32 so we can distinguish between corrupt
+ // and unsupported files.
+ const uint32_t crc = lzma_crc32(in + sizeof(lzma_header_magic),
+ LZMA_STREAM_FLAGS_SIZE, 0);
+ if (crc != read32le(in + sizeof(lzma_header_magic)
+ + LZMA_STREAM_FLAGS_SIZE)) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ return LZMA_DATA_ERROR;
+#endif
+ }
+
+ // Stream Flags
+ if (stream_flags_decode(options, in + sizeof(lzma_header_magic)))
+ return LZMA_OPTIONS_ERROR;
+
+ // Set Backward Size to indicate unknown value. That way
+ // lzma_stream_flags_compare() can be used to compare Stream Header
+ // and Stream Footer while keeping it useful also for comparing
+ // two Stream Footers.
+ options->backward_size = LZMA_VLI_UNKNOWN;
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_footer_decode(lzma_stream_flags *options, const uint8_t *in)
+{
+ // Magic
+ if (memcmp(in + sizeof(uint32_t) * 2 + LZMA_STREAM_FLAGS_SIZE,
+ lzma_footer_magic, sizeof(lzma_footer_magic)) != 0)
+ return LZMA_FORMAT_ERROR;
+
+ // CRC32
+ const uint32_t crc = lzma_crc32(in + sizeof(uint32_t),
+ sizeof(uint32_t) + LZMA_STREAM_FLAGS_SIZE, 0);
+ if (crc != read32le(in)) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+ return LZMA_DATA_ERROR;
+#endif
+ }
+
+ // Stream Flags
+ if (stream_flags_decode(options, in + sizeof(uint32_t) * 2))
+ return LZMA_OPTIONS_ERROR;
+
+ // Backward Size
+ options->backward_size = read32le(in + sizeof(uint32_t));
+ options->backward_size = (options->backward_size + 1) * 4;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/stream_flags_encoder.c b/src/liblzma/common/stream_flags_encoder.c
new file mode 100644
index 0000000..b98ab17
--- /dev/null
+++ b/src/liblzma/common/stream_flags_encoder.c
@@ -0,0 +1,86 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file stream_flags_encoder.c
+/// \brief Encodes Stream Header and Stream Footer for .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "stream_flags_common.h"
+
+
+static bool
+stream_flags_encode(const lzma_stream_flags *options, uint8_t *out)
+{
+ if ((unsigned int)(options->check) > LZMA_CHECK_ID_MAX)
+ return true;
+
+ out[0] = 0x00;
+ out[1] = options->check;
+
+ return false;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_header_encode(const lzma_stream_flags *options, uint8_t *out)
+{
+ assert(sizeof(lzma_header_magic) + LZMA_STREAM_FLAGS_SIZE
+ + 4 == LZMA_STREAM_HEADER_SIZE);
+
+ if (options->version != 0)
+ return LZMA_OPTIONS_ERROR;
+
+ // Magic
+ memcpy(out, lzma_header_magic, sizeof(lzma_header_magic));
+
+ // Stream Flags
+ if (stream_flags_encode(options, out + sizeof(lzma_header_magic)))
+ return LZMA_PROG_ERROR;
+
+ // CRC32 of the Stream Header
+ const uint32_t crc = lzma_crc32(out + sizeof(lzma_header_magic),
+ LZMA_STREAM_FLAGS_SIZE, 0);
+
+ write32le(out + sizeof(lzma_header_magic) + LZMA_STREAM_FLAGS_SIZE,
+ crc);
+
+ return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_stream_footer_encode(const lzma_stream_flags *options, uint8_t *out)
+{
+ assert(2 * 4 + LZMA_STREAM_FLAGS_SIZE + sizeof(lzma_footer_magic)
+ == LZMA_STREAM_HEADER_SIZE);
+
+ if (options->version != 0)
+ return LZMA_OPTIONS_ERROR;
+
+ // Backward Size
+ if (!is_backward_size_valid(options))
+ return LZMA_PROG_ERROR;
+
+ write32le(out + 4, options->backward_size / 4 - 1);
+
+ // Stream Flags
+ if (stream_flags_encode(options, out + 2 * 4))
+ return LZMA_PROG_ERROR;
+
+ // CRC32
+ const uint32_t crc = lzma_crc32(
+ out + 4, 4 + LZMA_STREAM_FLAGS_SIZE, 0);
+
+ write32le(out, crc);
+
+ // Magic
+ memcpy(out + 2 * 4 + LZMA_STREAM_FLAGS_SIZE,
+ lzma_footer_magic, sizeof(lzma_footer_magic));
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/common/string_conversion.c b/src/liblzma/common/string_conversion.c
new file mode 100644
index 0000000..d2c1e80
--- /dev/null
+++ b/src/liblzma/common/string_conversion.c
@@ -0,0 +1,1324 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file string_conversion.c
+/// \brief Conversion of strings to filter chain and vice versa
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_common.h"
+
+
+/////////////////////
+// String building //
+/////////////////////
+
+/// How much memory to allocate for strings. For now, no realloc is used
+/// so this needs to be big enough even though there of course is
+/// an overflow check still.
+///
+/// FIXME? Using a fixed size is wasteful if the application doesn't free
+/// the string fairly quickly but this can be improved later if needed.
+#define STR_ALLOC_SIZE 800
+
+
+typedef struct {
+ char *buf;
+ size_t pos;
+} lzma_str;
+
+
+static lzma_ret
+str_init(lzma_str *str, const lzma_allocator *allocator)
+{
+ str->buf = lzma_alloc(STR_ALLOC_SIZE, allocator);
+ if (str->buf == NULL)
+ return LZMA_MEM_ERROR;
+
+ str->pos = 0;
+ return LZMA_OK;
+}
+
+
+static void
+str_free(lzma_str *str, const lzma_allocator *allocator)
+{
+ lzma_free(str->buf, allocator);
+ return;
+}
+
+
+static bool
+str_is_full(const lzma_str *str)
+{
+ return str->pos == STR_ALLOC_SIZE - 1;
+}
+
+
+static lzma_ret
+str_finish(char **dest, lzma_str *str, const lzma_allocator *allocator)
+{
+ if (str_is_full(str)) {
+ // The preallocated buffer was too small.
+ // This shouldn't happen as STR_ALLOC_SIZE should
+ // be adjusted if new filters are added.
+ lzma_free(str->buf, allocator);
+ *dest = NULL;
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ str->buf[str->pos] = '\0';
+ *dest = str->buf;
+ return LZMA_OK;
+}
+
+
+static void
+str_append_str(lzma_str *str, const char *s)
+{
+ const size_t len = strlen(s);
+ const size_t limit = STR_ALLOC_SIZE - 1 - str->pos;
+ const size_t copy_size = my_min(len, limit);
+
+ memcpy(str->buf + str->pos, s, copy_size);
+ str->pos += copy_size;
+ return;
+}
+
+
+static void
+str_append_u32(lzma_str *str, uint32_t v, bool use_byte_suffix)
+{
+ if (v == 0) {
+ str_append_str(str, "0");
+ } else {
+ // NOTE: Don't use plain "B" because xz and the parser in this
+ // file don't support it and at glance it may look like 8
+ // (there cannot be a space before the suffix).
+ static const char suffixes[4][4] = { "", "KiB", "MiB", "GiB" };
+
+ size_t suf = 0;
+ if (use_byte_suffix) {
+ while ((v & 1023) == 0
+ && suf < ARRAY_SIZE(suffixes) - 1) {
+ v >>= 10;
+ ++suf;
+ }
+ }
+
+ // UINT32_MAX in base 10 would need 10 + 1 bytes. Remember
+ // that initializing to "" initializes all elements to
+ // zero so '\0'-termination gets handled by this.
+ char buf[16] = "";
+ size_t pos = sizeof(buf) - 1;
+
+ do {
+ buf[--pos] = '0' + (v % 10);
+ v /= 10;
+ } while (v != 0);
+
+ str_append_str(str, buf + pos);
+ str_append_str(str, suffixes[suf]);
+ }
+
+ return;
+}
+
+
+//////////////////////////////////////////////
+// Parsing and stringification declarations //
+//////////////////////////////////////////////
+
+/// Maximum length for filter and option names.
+/// 11 chars + terminating '\0' + sizeof(uint32_t) = 16 bytes
+#define NAME_LEN_MAX 11
+
+
+/// For option_map.flags: Use .u.map to do convert the input value
+/// to an integer. Without this flag, .u.range.{min,max} are used
+/// as the allowed range for the integer.
+#define OPTMAP_USE_NAME_VALUE_MAP 0x01
+
+/// For option_map.flags: Allow KiB/MiB/GiB in input string and use them in
+/// the stringified output if the value is an exact multiple of these.
+/// This is used e.g. for LZMA1/2 dictionary size.
+#define OPTMAP_USE_BYTE_SUFFIX 0x02
+
+/// For option_map.flags: If the integer value is zero then this option
+/// won't be included in the stringified output. It's used e.g. for
+/// BCJ filter start offset which usually is zero.
+#define OPTMAP_NO_STRFY_ZERO 0x04
+
+/// Possible values for option_map.type. Since OPTMAP_TYPE_UINT32 is 0,
+/// it doesn't need to be specified in the initializers as it is
+/// the implicit value.
+enum {
+ OPTMAP_TYPE_UINT32,
+ OPTMAP_TYPE_LZMA_MODE,
+ OPTMAP_TYPE_LZMA_MATCH_FINDER,
+ OPTMAP_TYPE_LZMA_PRESET,
+};
+
+
+/// This is for mapping string values in options to integers.
+/// The last element of an array must have "" as the name.
+/// It's used e.g. for match finder names in LZMA1/2.
+typedef struct {
+ const char name[NAME_LEN_MAX + 1];
+ const uint32_t value;
+} name_value_map;
+
+
+/// Each filter that has options needs an array of option_map structures.
+/// The array doesn't need to be terminated as the functions take the
+/// length of the array as an argument.
+///
+/// When converting a string to filter options structure, option values
+/// will be handled in a few different ways:
+///
+/// (1) If .type equals OPTMAP_TYPE_LZMA_PRESET then LZMA1/2 preset string
+/// is handled specially.
+///
+/// (2) If .flags has OPTMAP_USE_NAME_VALUE_MAP set then the string is
+/// converted to an integer using the name_value_map pointed by .u.map.
+/// The last element in .u.map must have .name = "" as the terminator.
+///
+/// (3) Otherwise the string is treated as a non-negative unsigned decimal
+/// integer which must be in the range set in .u.range. If .flags has
+/// OPTMAP_USE_BYTE_SUFFIX then KiB, MiB, and GiB suffixes are allowed.
+///
+/// The integer value from (2) or (3) is then stored to filter_options
+/// at the offset specified in .offset using the type specified in .type
+/// (default is uint32_t).
+///
+/// Stringifying a filter is done by processing a given number of options
+/// in order from the beginning of an option_map array. The integer is
+/// read from filter_options at .offset using the type from .type.
+///
+/// If the integer is zero and .flags has OPTMAP_NO_STRFY_ZERO then the
+/// option is skipped.
+///
+/// If .flags has OPTMAP_USE_NAME_VALUE_MAP set then .u.map will be used
+/// to convert the option to a string. If the map doesn't contain a string
+/// for the integer value then "UNKNOWN" is used.
+///
+/// If .flags doesn't have OPTMAP_USE_NAME_VALUE_MAP set then the integer is
+/// converted to a decimal value. If OPTMAP_USE_BYTE_SUFFIX is used then KiB,
+/// MiB, or GiB suffix is used if the value is an exact multiple of these.
+/// Plain "B" suffix is never used.
+typedef struct {
+ char name[NAME_LEN_MAX + 1];
+ uint8_t type;
+ uint8_t flags;
+ uint16_t offset;
+
+ union {
+ struct {
+ uint32_t min;
+ uint32_t max;
+ } range;
+
+ const name_value_map *map;
+ } u;
+} option_map;
+
+
+static const char *parse_options(const char **const str, const char *str_end,
+ void *filter_options,
+ const option_map *const optmap, const size_t optmap_size);
+
+
+/////////
+// BCJ //
+/////////
+
+#if defined(HAVE_ENCODER_X86) \
+ || defined(HAVE_DECODER_X86) \
+ || defined(HAVE_ENCODER_ARM) \
+ || defined(HAVE_DECODER_ARM) \
+ || defined(HAVE_ENCODER_ARMTHUMB) \
+ || defined(HAVE_DECODER_ARMTHUMB) \
+ || defined(HAVE_ENCODER_ARM64) \
+ || defined(HAVE_DECODER_ARM64) \
+ || defined(HAVE_ENCODER_POWERPC) \
+ || defined(HAVE_DECODER_POWERPC) \
+ || defined(HAVE_ENCODER_IA64) \
+ || defined(HAVE_DECODER_IA64) \
+ || defined(HAVE_ENCODER_SPARC) \
+ || defined(HAVE_DECODER_SPARC)
+static const option_map bcj_optmap[] = {
+ {
+ .name = "start",
+ .flags = OPTMAP_NO_STRFY_ZERO | OPTMAP_USE_BYTE_SUFFIX,
+ .offset = offsetof(lzma_options_bcj, start_offset),
+ .u.range.min = 0,
+ .u.range.max = UINT32_MAX,
+ }
+};
+
+
+static const char *
+parse_bcj(const char **const str, const char *str_end, void *filter_options)
+{
+ // filter_options was zeroed on allocation and that is enough
+ // for the default value.
+ return parse_options(str, str_end, filter_options,
+ bcj_optmap, ARRAY_SIZE(bcj_optmap));
+}
+#endif
+
+
+///////////
+// Delta //
+///////////
+
+#if defined(HAVE_ENCODER_DELTA) || defined(HAVE_DECODER_DELTA)
+static const option_map delta_optmap[] = {
+ {
+ .name = "dist",
+ .offset = offsetof(lzma_options_delta, dist),
+ .u.range.min = LZMA_DELTA_DIST_MIN,
+ .u.range.max = LZMA_DELTA_DIST_MAX,
+ }
+};
+
+
+static const char *
+parse_delta(const char **const str, const char *str_end, void *filter_options)
+{
+ lzma_options_delta *opts = filter_options;
+ opts->type = LZMA_DELTA_TYPE_BYTE;
+ opts->dist = LZMA_DELTA_DIST_MIN;
+
+ return parse_options(str, str_end, filter_options,
+ delta_optmap, ARRAY_SIZE(delta_optmap));
+}
+#endif
+
+
+///////////////////
+// LZMA1 & LZMA2 //
+///////////////////
+
+/// Help string for presets
+#define LZMA12_PRESET_STR "0-9[e]"
+
+
+static const char *
+parse_lzma12_preset(const char **const str, const char *str_end,
+ uint32_t *preset)
+{
+ assert(*str < str_end);
+ *preset = (uint32_t)(**str - '0');
+
+ // NOTE: Remember to update LZMA12_PRESET_STR if this is modified!
+ while (++*str < str_end) {
+ switch (**str) {
+ case 'e':
+ *preset |= LZMA_PRESET_EXTREME;
+ break;
+
+ default:
+ return "Unsupported preset flag";
+ }
+ }
+
+ return NULL;
+}
+
+
+static const char *
+set_lzma12_preset(const char **const str, const char *str_end,
+ void *filter_options)
+{
+ uint32_t preset;
+ const char *errmsg = parse_lzma12_preset(str, str_end, &preset);
+ if (errmsg != NULL)
+ return errmsg;
+
+ lzma_options_lzma *opts = filter_options;
+ if (lzma_lzma_preset(opts, preset))
+ return "Unsupported preset";
+
+ return NULL;
+}
+
+
+static const name_value_map lzma12_mode_map[] = {
+ { "fast", LZMA_MODE_FAST },
+ { "normal", LZMA_MODE_NORMAL },
+ { "", 0 }
+};
+
+
+static const name_value_map lzma12_mf_map[] = {
+ { "hc3", LZMA_MF_HC3 },
+ { "hc4", LZMA_MF_HC4 },
+ { "bt2", LZMA_MF_BT2 },
+ { "bt3", LZMA_MF_BT3 },
+ { "bt4", LZMA_MF_BT4 },
+ { "", 0 }
+};
+
+
+static const option_map lzma12_optmap[] = {
+ {
+ .name = "preset",
+ .type = OPTMAP_TYPE_LZMA_PRESET,
+ }, {
+ .name = "dict",
+ .flags = OPTMAP_USE_BYTE_SUFFIX,
+ .offset = offsetof(lzma_options_lzma, dict_size),
+ .u.range.min = LZMA_DICT_SIZE_MIN,
+ // FIXME? The max is really max for encoding but decoding
+ // would allow 4 GiB - 1 B.
+ .u.range.max = (UINT32_C(1) << 30) + (UINT32_C(1) << 29),
+ }, {
+ .name = "lc",
+ .offset = offsetof(lzma_options_lzma, lc),
+ .u.range.min = LZMA_LCLP_MIN,
+ .u.range.max = LZMA_LCLP_MAX,
+ }, {
+ .name = "lp",
+ .offset = offsetof(lzma_options_lzma, lp),
+ .u.range.min = LZMA_LCLP_MIN,
+ .u.range.max = LZMA_LCLP_MAX,
+ }, {
+ .name = "pb",
+ .offset = offsetof(lzma_options_lzma, pb),
+ .u.range.min = LZMA_PB_MIN,
+ .u.range.max = LZMA_PB_MAX,
+ }, {
+ .name = "mode",
+ .type = OPTMAP_TYPE_LZMA_MODE,
+ .flags = OPTMAP_USE_NAME_VALUE_MAP,
+ .offset = offsetof(lzma_options_lzma, mode),
+ .u.map = lzma12_mode_map,
+ }, {
+ .name = "nice",
+ .offset = offsetof(lzma_options_lzma, nice_len),
+ .u.range.min = 2,
+ .u.range.max = 273,
+ }, {
+ .name = "mf",
+ .type = OPTMAP_TYPE_LZMA_MATCH_FINDER,
+ .flags = OPTMAP_USE_NAME_VALUE_MAP,
+ .offset = offsetof(lzma_options_lzma, mf),
+ .u.map = lzma12_mf_map,
+ }, {
+ .name = "depth",
+ .offset = offsetof(lzma_options_lzma, depth),
+ .u.range.min = 0,
+ .u.range.max = UINT32_MAX,
+ }
+};
+
+
+static const char *
+parse_lzma12(const char **const str, const char *str_end, void *filter_options)
+{
+ lzma_options_lzma *opts = filter_options;
+
+ // It cannot fail.
+ const bool preset_ret = lzma_lzma_preset(opts, LZMA_PRESET_DEFAULT);
+ assert(!preset_ret);
+ (void)preset_ret;
+
+ const char *errmsg = parse_options(str, str_end, filter_options,
+ lzma12_optmap, ARRAY_SIZE(lzma12_optmap));
+ if (errmsg != NULL)
+ return errmsg;
+
+ if (opts->lc + opts->lp > LZMA_LCLP_MAX)
+ return "The sum of lc and lp must not exceed 4";
+
+ return NULL;
+}
+
+
+/////////////////////////////////////////
+// Generic parsing and stringification //
+/////////////////////////////////////////
+
+static const struct {
+ /// Name of the filter
+ char name[NAME_LEN_MAX + 1];
+
+ /// For lzma_str_to_filters:
+ /// Size of the filter-specific options structure.
+ uint32_t opts_size;
+
+ /// Filter ID
+ lzma_vli id;
+
+ /// For lzma_str_to_filters:
+ /// Function to parse the filter-specific options. The filter_options
+ /// will already have been allocated using lzma_alloc_zero().
+ const char *(*parse)(const char **str, const char *str_end,
+ void *filter_options);
+
+ /// For lzma_str_from_filters:
+ /// If the flag LZMA_STR_ENCODER is used then the first
+ /// strfy_encoder elements of optmap are stringified.
+ /// With LZMA_STR_DECODER strfy_decoder is used.
+ /// Currently encoders use all options that decoders do but if
+ /// that changes then this needs to be changed too, for example,
+ /// add a new OPTMAP flag to skip printing some decoder-only options.
+ const option_map *optmap;
+ uint8_t strfy_encoder;
+ uint8_t strfy_decoder;
+
+ /// For lzma_str_from_filters:
+ /// If true, lzma_filter.options is allowed to be NULL. In that case,
+ /// only the filter name is printed without any options.
+ bool allow_null;
+
+} filter_name_map[] = {
+#if defined (HAVE_ENCODER_LZMA1) || defined(HAVE_DECODER_LZMA1)
+ { "lzma1", sizeof(lzma_options_lzma), LZMA_FILTER_LZMA1,
+ &parse_lzma12, lzma12_optmap, 9, 5, false },
+#endif
+
+#if defined(HAVE_ENCODER_LZMA2) || defined(HAVE_DECODER_LZMA2)
+ { "lzma2", sizeof(lzma_options_lzma), LZMA_FILTER_LZMA2,
+ &parse_lzma12, lzma12_optmap, 9, 2, false },
+#endif
+
+#if defined(HAVE_ENCODER_X86) || defined(HAVE_DECODER_X86)
+ { "x86", sizeof(lzma_options_bcj), LZMA_FILTER_X86,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_ARM) || defined(HAVE_DECODER_ARM)
+ { "arm", sizeof(lzma_options_bcj), LZMA_FILTER_ARM,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_ARMTHUMB) || defined(HAVE_DECODER_ARMTHUMB)
+ { "armthumb", sizeof(lzma_options_bcj), LZMA_FILTER_ARMTHUMB,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_ARM64) || defined(HAVE_DECODER_ARM64)
+ { "arm64", sizeof(lzma_options_bcj), LZMA_FILTER_ARM64,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_POWERPC) || defined(HAVE_DECODER_POWERPC)
+ { "powerpc", sizeof(lzma_options_bcj), LZMA_FILTER_POWERPC,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_IA64) || defined(HAVE_DECODER_IA64)
+ { "ia64", sizeof(lzma_options_bcj), LZMA_FILTER_IA64,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_SPARC) || defined(HAVE_DECODER_SPARC)
+ { "sparc", sizeof(lzma_options_bcj), LZMA_FILTER_SPARC,
+ &parse_bcj, bcj_optmap, 1, 1, true },
+#endif
+
+#if defined(HAVE_ENCODER_DELTA) || defined(HAVE_DECODER_DELTA)
+ { "delta", sizeof(lzma_options_delta), LZMA_FILTER_DELTA,
+ &parse_delta, delta_optmap, 1, 1, false },
+#endif
+};
+
+
+/// Decodes options from a string for one filter (name1=value1,name2=value2).
+/// Caller must have allocated memory for filter_options already and set
+/// the initial default values. This is called from the filter-specific
+/// parse_* functions.
+///
+/// The input string starts at *str and the address in str_end is the first
+/// char that is not part of the string anymore. So no '\0' terminator is
+/// used. *str is advanced every time something has been decoded successfully.
+static const char *
+parse_options(const char **const str, const char *str_end,
+ void *filter_options,
+ const option_map *const optmap, const size_t optmap_size)
+{
+ while (*str < str_end && **str != '\0') {
+ // Each option is of the form name=value.
+ // Commas (',') separate options. Extra commas are ignored.
+ // Ignoring extra commas makes it simpler if an optional
+ // option stored in a shell variable which can be empty.
+ if (**str == ',') {
+ ++*str;
+ continue;
+ }
+
+ // Find where the next name=value ends.
+ const size_t str_len = (size_t)(str_end - *str);
+ const char *name_eq_value_end = memchr(*str, ',', str_len);
+ if (name_eq_value_end == NULL)
+ name_eq_value_end = str_end;
+
+ const char *equals_sign = memchr(*str, '=',
+ (size_t)(name_eq_value_end - *str));
+
+ // Fail if the '=' wasn't found or the option name is missing
+ // (the first char is '=').
+ if (equals_sign == NULL || **str == '=')
+ return "Options must be 'name=value' pairs separated "
+ "with commas";
+
+ // Reject a too long option name so that the memcmp()
+ // in the loop below won't read past the end of the
+ // string in optmap[i].name.
+ const size_t name_len = (size_t)(equals_sign - *str);
+ if (name_len > NAME_LEN_MAX)
+ return "Unknown option name";
+
+ // Find the option name from optmap[].
+ size_t i = 0;
+ while (true) {
+ if (i == optmap_size)
+ return "Unknown option name";
+
+ if (memcmp(*str, optmap[i].name, name_len) == 0
+ && optmap[i].name[name_len] == '\0')
+ break;
+
+ ++i;
+ }
+
+ // The input string is good at least until the start of
+ // the option value.
+ *str = equals_sign + 1;
+
+ // The code assumes that the option value isn't an empty
+ // string so check it here.
+ const size_t value_len = (size_t)(name_eq_value_end - *str);
+ if (value_len == 0)
+ return "Option value cannot be empty";
+
+ // LZMA1/2 preset has its own parsing function.
+ if (optmap[i].type == OPTMAP_TYPE_LZMA_PRESET) {
+ const char *errmsg = set_lzma12_preset(str,
+ name_eq_value_end, filter_options);
+ if (errmsg != NULL)
+ return errmsg;
+
+ continue;
+ }
+
+ // It's an integer value.
+ uint32_t v;
+ if (optmap[i].flags & OPTMAP_USE_NAME_VALUE_MAP) {
+ // The integer is picked from a string-to-integer map.
+ //
+ // Reject a too long value string so that the memcmp()
+ // in the loop below won't read past the end of the
+ // string in optmap[i].u.map[j].name.
+ if (value_len > NAME_LEN_MAX)
+ return "Invalid option value";
+
+ const name_value_map *map = optmap[i].u.map;
+ size_t j = 0;
+ while (true) {
+ // The array is terminated with an empty name.
+ if (map[j].name[0] == '\0')
+ return "Invalid option value";
+
+ if (memcmp(*str, map[j].name, value_len) == 0
+ && map[j].name[value_len]
+ == '\0') {
+ v = map[j].value;
+ break;
+ }
+
+ ++j;
+ }
+ } else if (**str < '0' || **str > '9') {
+ // Note that "max" isn't supported while it is
+ // supported in xz. It's not useful here.
+ return "Value is not a non-negative decimal integer";
+ } else {
+ // strtoul() has locale-specific behavior so it cannot
+ // be relied on to get reproducible results since we
+ // cannot change the locate in a thread-safe library.
+ // It also needs '\0'-termination.
+ //
+ // Use a temporary pointer so that *str will point
+ // to the beginning of the value string in case
+ // an error occurs.
+ const char *p = *str;
+ v = 0;
+ do {
+ if (v > UINT32_MAX / 10)
+ return "Value out of range";
+
+ v *= 10;
+
+ const uint32_t add = (uint32_t)(*p - '0');
+ if (UINT32_MAX - add < v)
+ return "Value out of range";
+
+ v += add;
+ ++p;
+ } while (p < name_eq_value_end
+ && *p >= '0' && *p <= '9');
+
+ if (p < name_eq_value_end) {
+ // Remember this position so that it can be
+ // used for error messages that are
+ // specifically about the suffix. (Out of
+ // range values are about the whole value
+ // and those error messages point to the
+ // beginning of the number part,
+ // not to the suffix.)
+ const char *multiplier_start = p;
+
+ // If multiplier suffix shouldn't be used
+ // then don't allow them even if the value
+ // would stay within limits. This is a somewhat
+ // unnecessary check but it rejects silly
+ // things like lzma2:pb=0MiB which xz allows.
+ if ((optmap[i].flags & OPTMAP_USE_BYTE_SUFFIX)
+ == 0) {
+ *str = multiplier_start;
+ return "This option does not support "
+ "any integer suffixes";
+ }
+
+ uint32_t shift;
+
+ switch (*p) {
+ case 'k':
+ case 'K':
+ shift = 10;
+ break;
+
+ case 'm':
+ case 'M':
+ shift = 20;
+ break;
+
+ case 'g':
+ case 'G':
+ shift = 30;
+ break;
+
+ default:
+ *str = multiplier_start;
+ return "Invalid multiplier suffix "
+ "(KiB, MiB, or GiB)";
+ }
+
+ ++p;
+
+ // Allow "M", "Mi", "MB", "MiB" and the same
+ // for the other five characters from the
+ // switch-statement above. All are handled
+ // as base-2 (perhaps a mistake, perhaps not).
+ // Note that 'i' and 'B' are case sensitive.
+ if (p < name_eq_value_end && *p == 'i')
+ ++p;
+
+ if (p < name_eq_value_end && *p == 'B')
+ ++p;
+
+ // Now we must have no chars remaining.
+ if (p < name_eq_value_end) {
+ *str = multiplier_start;
+ return "Invalid multiplier suffix "
+ "(KiB, MiB, or GiB)";
+ }
+
+ if (v > (UINT32_MAX >> shift))
+ return "Value out of range";
+
+ v <<= shift;
+ }
+
+ if (v < optmap[i].u.range.min
+ || v > optmap[i].u.range.max)
+ return "Value out of range";
+ }
+
+ // Set the value in filter_options. Enums are handled
+ // specially since the underlying type isn't the same
+ // as uint32_t on all systems.
+ void *ptr = (char *)filter_options + optmap[i].offset;
+ switch (optmap[i].type) {
+ case OPTMAP_TYPE_LZMA_MODE:
+ *(lzma_mode *)ptr = (lzma_mode)v;
+ break;
+
+ case OPTMAP_TYPE_LZMA_MATCH_FINDER:
+ *(lzma_match_finder *)ptr = (lzma_match_finder)v;
+ break;
+
+ default:
+ *(uint32_t *)ptr = v;
+ break;
+ }
+
+ // This option has been successfully handled.
+ *str = name_eq_value_end;
+ }
+
+ // No errors.
+ return NULL;
+}
+
+
+/// Finds the name of the filter at the beginning of the string and
+/// calls filter_name_map[i].parse() to decode the filter-specific options.
+/// The caller must have set str_end so that exactly one filter and its
+/// options are present without any trailing characters.
+static const char *
+parse_filter(const char **const str, const char *str_end, lzma_filter *filter,
+ const lzma_allocator *allocator, bool only_xz)
+{
+ // Search for a colon or equals sign that would separate the filter
+ // name from filter options. If neither is found, then the input
+ // string only contains a filter name and there are no options.
+ //
+ // First assume that a colon or equals sign won't be found:
+ const char *name_end = str_end;
+ const char *opts_start = str_end;
+
+ for (const char *p = *str; p < str_end; ++p) {
+ if (*p == ':' || *p == '=') {
+ name_end = p;
+
+ // Filter options (name1=value1,name2=value2,...)
+ // begin after the colon or equals sign.
+ opts_start = p + 1;
+ break;
+ }
+ }
+
+ // Reject a too long filter name so that the memcmp()
+ // in the loop below won't read past the end of the
+ // string in filter_name_map[i].name.
+ const size_t name_len = (size_t)(name_end - *str);
+ if (name_len > NAME_LEN_MAX)
+ return "Unknown filter name";
+
+ for (size_t i = 0; i < ARRAY_SIZE(filter_name_map); ++i) {
+ if (memcmp(*str, filter_name_map[i].name, name_len) == 0
+ && filter_name_map[i].name[name_len] == '\0') {
+ if (only_xz && filter_name_map[i].id
+ >= LZMA_FILTER_RESERVED_START)
+ return "This filter cannot be used in "
+ "the .xz format";
+
+ // Allocate the filter-specific options and
+ // initialize the memory with zeros.
+ void *options = lzma_alloc_zero(
+ filter_name_map[i].opts_size,
+ allocator);
+ if (options == NULL)
+ return "Memory allocation failed";
+
+ // Filter name was found so the input string is good
+ // at least this far.
+ *str = opts_start;
+
+ const char *errmsg = filter_name_map[i].parse(
+ str, str_end, options);
+ if (errmsg != NULL) {
+ lzma_free(options, allocator);
+ return errmsg;
+ }
+
+ // *filter is modified only when parsing is successful.
+ filter->id = filter_name_map[i].id;
+ filter->options = options;
+ return NULL;
+ }
+ }
+
+ return "Unknown filter name";
+}
+
+
+/// Converts the string to a filter chain (array of lzma_filter structures).
+///
+/// *str is advanced every time something has been decoded successfully.
+/// This way the caller knows where in the string a possible error occurred.
+static const char *
+str_to_filters(const char **const str, lzma_filter *filters, uint32_t flags,
+ const lzma_allocator *allocator)
+{
+ const char *errmsg;
+
+ // Skip leading spaces.
+ while (**str == ' ')
+ ++*str;
+
+ if (**str == '\0')
+ return "Empty string is not allowed, "
+ "try \"6\" if a default value is needed";
+
+ // Detect the type of the string.
+ //
+ // A string beginning with a digit or a string beginning with
+ // one dash and a digit are treated as presets. Trailing spaces
+ // will be ignored too (leading spaces were already ignored above).
+ //
+ // For example, "6", "7 ", "-9e", or " -3 " are treated as presets.
+ // Strings like "-" or "- " aren't preset.
+#define MY_IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
+ if (MY_IS_DIGIT(**str) || (**str == '-' && MY_IS_DIGIT((*str)[1]))) {
+ if (**str == '-')
+ ++*str;
+
+ // Ignore trailing spaces.
+ const size_t str_len = strlen(*str);
+ const char *str_end = memchr(*str, ' ', str_len);
+ if (str_end != NULL) {
+ // There is at least one trailing space. Check that
+ // there are no chars other than spaces.
+ for (size_t i = 1; str_end[i] != '\0'; ++i)
+ if (str_end[i] != ' ')
+ return "Unsupported preset";
+ } else {
+ // There are no trailing spaces. Use the whole string.
+ str_end = *str + str_len;
+ }
+
+ uint32_t preset;
+ errmsg = parse_lzma12_preset(str, str_end, &preset);
+ if (errmsg != NULL)
+ return errmsg;
+
+ lzma_options_lzma *opts = lzma_alloc(sizeof(*opts), allocator);
+ if (opts == NULL)
+ return "Memory allocation failed";
+
+ if (lzma_lzma_preset(opts, preset)) {
+ lzma_free(opts, allocator);
+ return "Unsupported preset";
+ }
+
+ filters[0].id = LZMA_FILTER_LZMA2;
+ filters[0].options = opts;
+ filters[1].id = LZMA_VLI_UNKNOWN;
+ filters[1].options = NULL;
+
+ return NULL;
+ }
+
+ // Not a preset so it must be a filter chain.
+ //
+ // If LZMA_STR_ALL_FILTERS isn't used we allow only filters that
+ // can be used in .xz.
+ const bool only_xz = (flags & LZMA_STR_ALL_FILTERS) == 0;
+
+ // Use a temporary array so that we don't modify the caller-supplied
+ // one until we know that no errors occurred.
+ lzma_filter temp_filters[LZMA_FILTERS_MAX + 1];
+
+ size_t i = 0;
+ do {
+ if (i == LZMA_FILTERS_MAX) {
+ errmsg = "The maximum number of filters is four";
+ goto error;
+ }
+
+ // Skip "--" if present.
+ if ((*str)[0] == '-' && (*str)[1] == '-')
+ *str += 2;
+
+ // Locate the end of "filter:name1=value1,name2=value2",
+ // stopping at the first "--" or a single space.
+ const char *filter_end = *str;
+ while (filter_end[0] != '\0') {
+ if ((filter_end[0] == '-' && filter_end[1] == '-')
+ || filter_end[0] == ' ')
+ break;
+
+ ++filter_end;
+ }
+
+ // Inputs that have "--" at the end or "-- " in the middle
+ // will result in an empty filter name.
+ if (filter_end == *str) {
+ errmsg = "Filter name is missing";
+ goto error;
+ }
+
+ errmsg = parse_filter(str, filter_end, &temp_filters[i],
+ allocator, only_xz);
+ if (errmsg != NULL)
+ goto error;
+
+ // Skip trailing spaces.
+ while (**str == ' ')
+ ++*str;
+
+ ++i;
+ } while (**str != '\0');
+
+ // Seems to be good, terminate the array so that
+ // basic validation can be done.
+ temp_filters[i].id = LZMA_VLI_UNKNOWN;
+ temp_filters[i].options = NULL;
+
+ // Do basic validation if the application didn't prohibit it.
+ if ((flags & LZMA_STR_NO_VALIDATION) == 0) {
+ size_t dummy;
+ const lzma_ret ret = lzma_validate_chain(temp_filters, &dummy);
+ assert(ret == LZMA_OK || ret == LZMA_OPTIONS_ERROR);
+ if (ret != LZMA_OK) {
+ errmsg = "Invalid filter chain "
+ "('lzma2' missing at the end?)";
+ goto error;
+ }
+ }
+
+ // All good. Copy the filters to the application supplied array.
+ memcpy(filters, temp_filters, (i + 1) * sizeof(lzma_filter));
+ return NULL;
+
+error:
+ // Free the filter options that were successfully decoded.
+ while (i-- > 0)
+ lzma_free(temp_filters[i].options, allocator);
+
+ return errmsg;
+}
+
+
+extern LZMA_API(const char *)
+lzma_str_to_filters(const char *str, int *error_pos, lzma_filter *filters,
+ uint32_t flags, const lzma_allocator *allocator)
+{
+ if (str == NULL || filters == NULL)
+ return "Unexpected NULL pointer argument(s) "
+ "to lzma_str_to_filters()";
+
+ // Validate the flags.
+ const uint32_t supported_flags
+ = LZMA_STR_ALL_FILTERS
+ | LZMA_STR_NO_VALIDATION;
+
+ if (flags & ~supported_flags)
+ return "Unsupported flags to lzma_str_to_filters()";
+
+ const char *used = str;
+ const char *errmsg = str_to_filters(&used, filters, flags, allocator);
+
+ if (error_pos != NULL) {
+ const size_t n = (size_t)(used - str);
+ *error_pos = n > INT_MAX ? INT_MAX : (int)n;
+ }
+
+ return errmsg;
+}
+
+
+/// Converts options of one filter to a string.
+///
+/// The caller must have already put the filter name in the destination
+/// string. Since it is possible that no options will be needed, the caller
+/// won't have put a delimiter character (':' or '=') in the string yet.
+/// We will add it if at least one option will be added to the string.
+static void
+strfy_filter(lzma_str *dest, const char *delimiter,
+ const option_map *optmap, size_t optmap_count,
+ const void *filter_options)
+{
+ for (size_t i = 0; i < optmap_count; ++i) {
+ // No attempt is made to reverse LZMA1/2 preset.
+ if (optmap[i].type == OPTMAP_TYPE_LZMA_PRESET)
+ continue;
+
+ // All options have integer values, some just are mapped
+ // to a string with a name_value_map. LZMA1/2 preset
+ // isn't reversed back to preset=PRESET form.
+ uint32_t v;
+ const void *ptr
+ = (const char *)filter_options + optmap[i].offset;
+ switch (optmap[i].type) {
+ case OPTMAP_TYPE_LZMA_MODE:
+ v = *(const lzma_mode *)ptr;
+ break;
+
+ case OPTMAP_TYPE_LZMA_MATCH_FINDER:
+ v = *(const lzma_match_finder *)ptr;
+ break;
+
+ default:
+ v = *(const uint32_t *)ptr;
+ break;
+ }
+
+ // Skip this if this option should be omitted from
+ // the string when the value is zero.
+ if (v == 0 && (optmap[i].flags & OPTMAP_NO_STRFY_ZERO))
+ continue;
+
+ // Before the first option we add whatever delimiter
+ // the caller gave us. For later options a comma is used.
+ str_append_str(dest, delimiter);
+ delimiter = ",";
+
+ // Add the option name and equals sign.
+ str_append_str(dest, optmap[i].name);
+ str_append_str(dest, "=");
+
+ if (optmap[i].flags & OPTMAP_USE_NAME_VALUE_MAP) {
+ const name_value_map *map = optmap[i].u.map;
+ size_t j = 0;
+ while (true) {
+ if (map[j].name[0] == '\0') {
+ str_append_str(dest, "UNKNOWN");
+ break;
+ }
+
+ if (map[j].value == v) {
+ str_append_str(dest, map[j].name);
+ break;
+ }
+
+ ++j;
+ }
+ } else {
+ str_append_u32(dest, v,
+ optmap[i].flags & OPTMAP_USE_BYTE_SUFFIX);
+ }
+ }
+
+ return;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_str_from_filters(char **output_str, const lzma_filter *filters,
+ uint32_t flags, const lzma_allocator *allocator)
+{
+ // On error *output_str is always set to NULL.
+ // Do it as the very first step.
+ if (output_str == NULL)
+ return LZMA_PROG_ERROR;
+
+ *output_str = NULL;
+
+ if (filters == NULL)
+ return LZMA_PROG_ERROR;
+
+ // Validate the flags.
+ const uint32_t supported_flags
+ = LZMA_STR_ENCODER
+ | LZMA_STR_DECODER
+ | LZMA_STR_GETOPT_LONG
+ | LZMA_STR_NO_SPACES;
+
+ if (flags & ~supported_flags)
+ return LZMA_OPTIONS_ERROR;
+
+ // There must be at least one filter.
+ if (filters[0].id == LZMA_VLI_UNKNOWN)
+ return LZMA_OPTIONS_ERROR;
+
+ // Allocate memory for the output string.
+ lzma_str dest;
+ return_if_error(str_init(&dest, allocator));
+
+ const bool show_opts = (flags & (LZMA_STR_ENCODER | LZMA_STR_DECODER));
+
+ const char *opt_delim = (flags & LZMA_STR_GETOPT_LONG) ? "=" : ":";
+
+ for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ // If we reach LZMA_FILTERS_MAX, then the filters array
+ // is too large since the ID cannot be LZMA_VLI_UNKNOWN here.
+ if (i == LZMA_FILTERS_MAX) {
+ str_free(&dest, allocator);
+ return LZMA_OPTIONS_ERROR;
+ }
+
+ // Don't add a space between filters if the caller
+ // doesn't want them.
+ if (i > 0 && !(flags & LZMA_STR_NO_SPACES))
+ str_append_str(&dest, " ");
+
+ // Use dashes for xz getopt_long() compatible syntax but also
+ // use dashes to separate filters when spaces weren't wanted.
+ if ((flags & LZMA_STR_GETOPT_LONG)
+ || (i > 0 && (flags & LZMA_STR_NO_SPACES)))
+ str_append_str(&dest, "--");
+
+ size_t j = 0;
+ while (true) {
+ if (j == ARRAY_SIZE(filter_name_map)) {
+ // Filter ID in filters[i].id isn't supported.
+ str_free(&dest, allocator);
+ return LZMA_OPTIONS_ERROR;
+ }
+
+ if (filter_name_map[j].id == filters[i].id) {
+ // Add the filter name.
+ str_append_str(&dest, filter_name_map[j].name);
+
+ // If only the filter names were wanted then
+ // skip to the next filter. In this case
+ // .options is ignored and may be NULL even
+ // when the filter doesn't allow NULL options.
+ if (!show_opts)
+ break;
+
+ if (filters[i].options == NULL) {
+ if (!filter_name_map[j].allow_null) {
+ // Filter-specific options
+ // are missing but with
+ // this filter the options
+ // structure is mandatory.
+ str_free(&dest, allocator);
+ return LZMA_OPTIONS_ERROR;
+ }
+
+ // .options is allowed to be NULL.
+ // There is no need to add any
+ // options to the string.
+ break;
+ }
+
+ // Options structure is available. Add
+ // the filter options to the string.
+ const size_t optmap_count
+ = (flags & LZMA_STR_ENCODER)
+ ? filter_name_map[j].strfy_encoder
+ : filter_name_map[j].strfy_decoder;
+ strfy_filter(&dest, opt_delim,
+ filter_name_map[j].optmap,
+ optmap_count,
+ filters[i].options);
+ break;
+ }
+
+ ++j;
+ }
+ }
+
+ return str_finish(output_str, &dest, allocator);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_str_list_filters(char **output_str, lzma_vli filter_id, uint32_t flags,
+ const lzma_allocator *allocator)
+{
+ // On error *output_str is always set to NULL.
+ // Do it as the very first step.
+ if (output_str == NULL)
+ return LZMA_PROG_ERROR;
+
+ *output_str = NULL;
+
+ // Validate the flags.
+ const uint32_t supported_flags
+ = LZMA_STR_ALL_FILTERS
+ | LZMA_STR_ENCODER
+ | LZMA_STR_DECODER
+ | LZMA_STR_GETOPT_LONG;
+
+ if (flags & ~supported_flags)
+ return LZMA_OPTIONS_ERROR;
+
+ // Allocate memory for the output string.
+ lzma_str dest;
+ return_if_error(str_init(&dest, allocator));
+
+ // If only listing the filter names then separate them with spaces.
+ // Otherwise use newlines.
+ const bool show_opts = (flags & (LZMA_STR_ENCODER | LZMA_STR_DECODER));
+ const char *filter_delim = show_opts ? "\n" : " ";
+
+ const char *opt_delim = (flags & LZMA_STR_GETOPT_LONG) ? "=" : ":";
+ bool first_filter_printed = false;
+
+ for (size_t i = 0; i < ARRAY_SIZE(filter_name_map); ++i) {
+ // If we are printing only one filter then skip others.
+ if (filter_id != LZMA_VLI_UNKNOWN
+ && filter_id != filter_name_map[i].id)
+ continue;
+
+ // If we are printing only .xz filters then skip the others.
+ if (filter_name_map[i].id >= LZMA_FILTER_RESERVED_START
+ && (flags & LZMA_STR_ALL_FILTERS) == 0
+ && filter_id == LZMA_VLI_UNKNOWN)
+ continue;
+
+ // Add a new line if this isn't the first filter being
+ // written to the string.
+ if (first_filter_printed)
+ str_append_str(&dest, filter_delim);
+
+ first_filter_printed = true;
+
+ if (flags & LZMA_STR_GETOPT_LONG)
+ str_append_str(&dest, "--");
+
+ str_append_str(&dest, filter_name_map[i].name);
+
+ // If only the filter names were wanted then continue
+ // to the next filter.
+ if (!show_opts)
+ continue;
+
+ const option_map *optmap = filter_name_map[i].optmap;
+ const char *d = opt_delim;
+
+ const size_t end = (flags & LZMA_STR_ENCODER)
+ ? filter_name_map[i].strfy_encoder
+ : filter_name_map[i].strfy_decoder;
+
+ for (size_t j = 0; j < end; ++j) {
+ // The first option is delimited from the filter
+ // name using "=" or ":" and the rest of the options
+ // are separated with ",".
+ str_append_str(&dest, d);
+ d = ",";
+
+ // optname=<possible_values>
+ str_append_str(&dest, optmap[j].name);
+ str_append_str(&dest, "=<");
+
+ if (optmap[j].type == OPTMAP_TYPE_LZMA_PRESET) {
+ // LZMA1/2 preset has its custom help string.
+ str_append_str(&dest, LZMA12_PRESET_STR);
+ } else if (optmap[j].flags
+ & OPTMAP_USE_NAME_VALUE_MAP) {
+ // Separate the possible option values by "|".
+ const name_value_map *m = optmap[j].u.map;
+ for (size_t k = 0; m[k].name[0] != '\0'; ++k) {
+ if (k > 0)
+ str_append_str(&dest, "|");
+
+ str_append_str(&dest, m[k].name);
+ }
+ } else {
+ // Integer range is shown as min-max.
+ const bool use_byte_suffix = optmap[j].flags
+ & OPTMAP_USE_BYTE_SUFFIX;
+ str_append_u32(&dest, optmap[j].u.range.min,
+ use_byte_suffix);
+ str_append_str(&dest, "-");
+ str_append_u32(&dest, optmap[j].u.range.max,
+ use_byte_suffix);
+ }
+
+ str_append_str(&dest, ">");
+ }
+ }
+
+ // If no filters were added to the string then it must be because
+ // the caller provided an unsupported Filter ID.
+ if (!first_filter_printed) {
+ str_free(&dest, allocator);
+ return LZMA_OPTIONS_ERROR;
+ }
+
+ return str_finish(output_str, &dest, allocator);
+}
diff --git a/src/liblzma/common/vli_decoder.c b/src/liblzma/common/vli_decoder.c
new file mode 100644
index 0000000..af2799d
--- /dev/null
+++ b/src/liblzma/common/vli_decoder.c
@@ -0,0 +1,86 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file vli_decoder.c
+/// \brief Decodes variable-length integers
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_vli_decode(lzma_vli *restrict vli, size_t *vli_pos,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size)
+{
+ // If we haven't been given vli_pos, work in single-call mode.
+ size_t vli_pos_internal = 0;
+ if (vli_pos == NULL) {
+ vli_pos = &vli_pos_internal;
+ *vli = 0;
+
+ // If there's no input, use LZMA_DATA_ERROR. This way it is
+ // easy to decode VLIs from buffers that have known size,
+ // and get the correct error code in case the buffer is
+ // too short.
+ if (*in_pos >= in_size)
+ return LZMA_DATA_ERROR;
+
+ } else {
+ // Initialize *vli when starting to decode a new integer.
+ if (*vli_pos == 0)
+ *vli = 0;
+
+ // Validate the arguments.
+ if (*vli_pos >= LZMA_VLI_BYTES_MAX
+ || (*vli >> (*vli_pos * 7)) != 0)
+ return LZMA_PROG_ERROR;;
+
+ if (*in_pos >= in_size)
+ return LZMA_BUF_ERROR;
+ }
+
+ do {
+ // Read the next byte. Use a temporary variable so that we
+ // can update *in_pos immediately.
+ const uint8_t byte = in[*in_pos];
+ ++*in_pos;
+
+ // Add the newly read byte to *vli.
+ *vli += (lzma_vli)(byte & 0x7F) << (*vli_pos * 7);
+ ++*vli_pos;
+
+ // Check if this is the last byte of a multibyte integer.
+ if ((byte & 0x80) == 0) {
+ // We don't allow using variable-length integers as
+ // padding i.e. the encoding must use the most the
+ // compact form.
+ if (byte == 0x00 && *vli_pos > 1)
+ return LZMA_DATA_ERROR;
+
+ return vli_pos == &vli_pos_internal
+ ? LZMA_OK : LZMA_STREAM_END;
+ }
+
+ // There is at least one more byte coming. If we have already
+ // read maximum number of bytes, the integer is considered
+ // corrupt.
+ //
+ // If we need bigger integers in future, old versions liblzma
+ // will confusingly indicate the file being corrupt instead of
+ // unsupported. I suppose it's still better this way, because
+ // in the foreseeable future (writing this in 2008) the only
+ // reason why files would appear having over 63-bit integers
+ // is that the files are simply corrupt.
+ if (*vli_pos == LZMA_VLI_BYTES_MAX)
+ return LZMA_DATA_ERROR;
+
+ } while (*in_pos < in_size);
+
+ return vli_pos == &vli_pos_internal ? LZMA_DATA_ERROR : LZMA_OK;
+}
diff --git a/src/liblzma/common/vli_encoder.c b/src/liblzma/common/vli_encoder.c
new file mode 100644
index 0000000..f864269
--- /dev/null
+++ b/src/liblzma/common/vli_encoder.c
@@ -0,0 +1,69 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file vli_encoder.c
+/// \brief Encodes variable-length integers
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_vli_encode(lzma_vli vli, size_t *vli_pos,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size)
+{
+ // If we haven't been given vli_pos, work in single-call mode.
+ size_t vli_pos_internal = 0;
+ if (vli_pos == NULL) {
+ vli_pos = &vli_pos_internal;
+
+ // In single-call mode, we expect that the caller has
+ // reserved enough output space.
+ if (*out_pos >= out_size)
+ return LZMA_PROG_ERROR;
+ } else {
+ // This never happens when we are called by liblzma, but
+ // may happen if called directly from an application.
+ if (*out_pos >= out_size)
+ return LZMA_BUF_ERROR;
+ }
+
+ // Validate the arguments.
+ if (*vli_pos >= LZMA_VLI_BYTES_MAX || vli > LZMA_VLI_MAX)
+ return LZMA_PROG_ERROR;
+
+ // Shift vli so that the next bits to encode are the lowest. In
+ // single-call mode this never changes vli since *vli_pos is zero.
+ vli >>= *vli_pos * 7;
+
+ // Write the non-last bytes in a loop.
+ while (vli >= 0x80) {
+ // We don't need *vli_pos during this function call anymore,
+ // but update it here so that it is ready if we need to
+ // return before the whole integer has been decoded.
+ ++*vli_pos;
+ assert(*vli_pos < LZMA_VLI_BYTES_MAX);
+
+ // Write the next byte.
+ out[*out_pos] = (uint8_t)(vli) | 0x80;
+ vli >>= 7;
+
+ if (++*out_pos == out_size)
+ return vli_pos == &vli_pos_internal
+ ? LZMA_PROG_ERROR : LZMA_OK;
+ }
+
+ // Write the last byte.
+ out[*out_pos] = (uint8_t)(vli);
+ ++*out_pos;
+ ++*vli_pos;
+
+ return vli_pos == &vli_pos_internal ? LZMA_OK : LZMA_STREAM_END;
+
+}
diff --git a/src/liblzma/common/vli_size.c b/src/liblzma/common/vli_size.c
new file mode 100644
index 0000000..ec1b4fa
--- /dev/null
+++ b/src/liblzma/common/vli_size.c
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file vli_size.c
+/// \brief Calculates the encoded size of a variable-length integer
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(uint32_t)
+lzma_vli_size(lzma_vli vli)
+{
+ if (vli > LZMA_VLI_MAX)
+ return 0;
+
+ uint32_t i = 0;
+ do {
+ vli >>= 7;
+ ++i;
+ } while (vli != 0);
+
+ assert(i <= LZMA_VLI_BYTES_MAX);
+ return i;
+}
diff --git a/src/liblzma/delta/Makefile.inc b/src/liblzma/delta/Makefile.inc
new file mode 100644
index 0000000..c7739b4
--- /dev/null
+++ b/src/liblzma/delta/Makefile.inc
@@ -0,0 +1,23 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+liblzma_la_SOURCES += \
+ delta/delta_common.c \
+ delta/delta_common.h \
+ delta/delta_private.h
+
+if COND_ENCODER_DELTA
+liblzma_la_SOURCES += \
+ delta/delta_encoder.c \
+ delta/delta_encoder.h
+endif
+
+if COND_DECODER_DELTA
+liblzma_la_SOURCES += \
+ delta/delta_decoder.c \
+ delta/delta_decoder.h
+endif
diff --git a/src/liblzma/delta/delta_common.c b/src/liblzma/delta/delta_common.c
new file mode 100644
index 0000000..4768201
--- /dev/null
+++ b/src/liblzma/delta/delta_common.c
@@ -0,0 +1,73 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_common.c
+/// \brief Common stuff for Delta encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "delta_common.h"
+#include "delta_private.h"
+
+
+static void
+delta_coder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_delta_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+extern lzma_ret
+lzma_delta_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ // Allocate memory for the decoder if needed.
+ lzma_delta_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_delta_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+
+ // End function is the same for encoder and decoder.
+ next->end = &delta_coder_end;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Validate the options.
+ if (lzma_delta_coder_memusage(filters[0].options) == UINT64_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ // Set the delta distance.
+ const lzma_options_delta *opt = filters[0].options;
+ coder->distance = opt->dist;
+
+ // Initialize the rest of the variables.
+ coder->pos = 0;
+ memzero(coder->history, LZMA_DELTA_DIST_MAX);
+
+ // Initialize the next decoder in the chain, if any.
+ return lzma_next_filter_init(&coder->next, allocator, filters + 1);
+}
+
+
+extern uint64_t
+lzma_delta_coder_memusage(const void *options)
+{
+ const lzma_options_delta *opt = options;
+
+ if (opt == NULL || opt->type != LZMA_DELTA_TYPE_BYTE
+ || opt->dist < LZMA_DELTA_DIST_MIN
+ || opt->dist > LZMA_DELTA_DIST_MAX)
+ return UINT64_MAX;
+
+ return sizeof(lzma_delta_coder);
+}
diff --git a/src/liblzma/delta/delta_common.h b/src/liblzma/delta/delta_common.h
new file mode 100644
index 0000000..7e7e1ba
--- /dev/null
+++ b/src/liblzma/delta/delta_common.h
@@ -0,0 +1,20 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_common.h
+/// \brief Common stuff for Delta encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_DELTA_COMMON_H
+#define LZMA_DELTA_COMMON_H
+
+#include "common.h"
+
+extern uint64_t lzma_delta_coder_memusage(const void *options);
+
+#endif
diff --git a/src/liblzma/delta/delta_decoder.c b/src/liblzma/delta/delta_decoder.c
new file mode 100644
index 0000000..77cf65c
--- /dev/null
+++ b/src/liblzma/delta/delta_decoder.c
@@ -0,0 +1,83 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_decoder.c
+/// \brief Delta filter decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "delta_decoder.h"
+#include "delta_private.h"
+
+
+static void
+decode_buffer(lzma_delta_coder *coder, uint8_t *buffer, size_t size)
+{
+ const size_t distance = coder->distance;
+
+ for (size_t i = 0; i < size; ++i) {
+ buffer[i] += coder->history[(distance + coder->pos) & 0xFF];
+ coder->history[coder->pos-- & 0xFF] = buffer[i];
+ }
+}
+
+
+static lzma_ret
+delta_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_delta_coder *coder = coder_ptr;
+
+ assert(coder->next.code != NULL);
+
+ const size_t out_start = *out_pos;
+
+ const lzma_ret ret = coder->next.code(coder->next.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ action);
+
+ // out might be NULL. In that case size == 0. Null pointer + 0 is
+ // undefined behavior so skip the call in that case as it would
+ // do nothing anyway.
+ const size_t size = *out_pos - out_start;
+ if (size > 0)
+ decode_buffer(coder, out + out_start, size);
+
+ return ret;
+}
+
+
+extern lzma_ret
+lzma_delta_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ next->code = &delta_decode;
+ return lzma_delta_coder_init(next, allocator, filters);
+}
+
+
+extern lzma_ret
+lzma_delta_props_decode(void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ if (props_size != 1)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_options_delta *opt
+ = lzma_alloc(sizeof(lzma_options_delta), allocator);
+ if (opt == NULL)
+ return LZMA_MEM_ERROR;
+
+ opt->type = LZMA_DELTA_TYPE_BYTE;
+ opt->dist = props[0] + 1U;
+
+ *options = opt;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/delta/delta_decoder.h b/src/liblzma/delta/delta_decoder.h
new file mode 100644
index 0000000..ad89cc6
--- /dev/null
+++ b/src/liblzma/delta/delta_decoder.h
@@ -0,0 +1,26 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_decoder.h
+/// \brief Delta filter decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_DELTA_DECODER_H
+#define LZMA_DELTA_DECODER_H
+
+#include "delta_common.h"
+
+extern lzma_ret lzma_delta_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_delta_props_decode(
+ void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size);
+
+#endif
diff --git a/src/liblzma/delta/delta_encoder.c b/src/liblzma/delta/delta_encoder.c
new file mode 100644
index 0000000..056bf74
--- /dev/null
+++ b/src/liblzma/delta/delta_encoder.c
@@ -0,0 +1,133 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_encoder.c
+/// \brief Delta filter encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "delta_encoder.h"
+#include "delta_private.h"
+
+
+/// Copies and encodes the data at the same time. This is used when Delta
+/// is the first filter in the chain (and thus the last filter in the
+/// encoder's filter stack).
+static void
+copy_and_encode(lzma_delta_coder *coder,
+ const uint8_t *restrict in, uint8_t *restrict out, size_t size)
+{
+ const size_t distance = coder->distance;
+
+ for (size_t i = 0; i < size; ++i) {
+ const uint8_t tmp = coder->history[
+ (distance + coder->pos) & 0xFF];
+ coder->history[coder->pos-- & 0xFF] = in[i];
+ out[i] = in[i] - tmp;
+ }
+}
+
+
+/// Encodes the data in place. This is used when we are the last filter
+/// in the chain (and thus non-last filter in the encoder's filter stack).
+static void
+encode_in_place(lzma_delta_coder *coder, uint8_t *buffer, size_t size)
+{
+ const size_t distance = coder->distance;
+
+ for (size_t i = 0; i < size; ++i) {
+ const uint8_t tmp = coder->history[
+ (distance + coder->pos) & 0xFF];
+ coder->history[coder->pos-- & 0xFF] = buffer[i];
+ buffer[i] -= tmp;
+ }
+}
+
+
+static lzma_ret
+delta_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_delta_coder *coder = coder_ptr;
+
+ lzma_ret ret;
+
+ if (coder->next.code == NULL) {
+ const size_t in_avail = in_size - *in_pos;
+ const size_t out_avail = out_size - *out_pos;
+ const size_t size = my_min(in_avail, out_avail);
+
+ // in and out might be NULL. In such cases size == 0.
+ // Null pointer + 0 is undefined behavior so skip
+ // the call in that case as it would do nothing anyway.
+ if (size > 0)
+ copy_and_encode(coder, in + *in_pos, out + *out_pos,
+ size);
+
+ *in_pos += size;
+ *out_pos += size;
+
+ ret = action != LZMA_RUN && *in_pos == in_size
+ ? LZMA_STREAM_END : LZMA_OK;
+
+ } else {
+ const size_t out_start = *out_pos;
+
+ ret = coder->next.code(coder->next.coder, allocator,
+ in, in_pos, in_size, out, out_pos, out_size,
+ action);
+
+ // Like above, avoid null pointer + 0.
+ const size_t size = *out_pos - out_start;
+ if (size > 0)
+ encode_in_place(coder, out + out_start, size);
+ }
+
+ return ret;
+}
+
+
+static lzma_ret
+delta_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters_null lzma_attribute((__unused__)),
+ const lzma_filter *reversed_filters)
+{
+ lzma_delta_coder *coder = coder_ptr;
+
+ // Delta doesn't and will never support changing the options in
+ // the middle of encoding. If the app tries to change them, we
+ // simply ignore them.
+ return lzma_next_filter_update(
+ &coder->next, allocator, reversed_filters + 1);
+}
+
+
+extern lzma_ret
+lzma_delta_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ next->code = &delta_encode;
+ next->update = &delta_encoder_update;
+ return lzma_delta_coder_init(next, allocator, filters);
+}
+
+
+extern lzma_ret
+lzma_delta_props_encode(const void *options, uint8_t *out)
+{
+ // The caller must have already validated the options, so it's
+ // LZMA_PROG_ERROR if they are invalid.
+ if (lzma_delta_coder_memusage(options) == UINT64_MAX)
+ return LZMA_PROG_ERROR;
+
+ const lzma_options_delta *opt = options;
+ out[0] = opt->dist - LZMA_DELTA_DIST_MIN;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/delta/delta_encoder.h b/src/liblzma/delta/delta_encoder.h
new file mode 100644
index 0000000..4ab9847
--- /dev/null
+++ b/src/liblzma/delta/delta_encoder.h
@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_encoder.h
+/// \brief Delta filter encoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_DELTA_ENCODER_H
+#define LZMA_DELTA_ENCODER_H
+
+#include "delta_common.h"
+
+extern lzma_ret lzma_delta_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_delta_props_encode(const void *options, uint8_t *out);
+
+#endif
diff --git a/src/liblzma/delta/delta_private.h b/src/liblzma/delta/delta_private.h
new file mode 100644
index 0000000..0d6cb38
--- /dev/null
+++ b/src/liblzma/delta/delta_private.h
@@ -0,0 +1,37 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file delta_private.h
+/// \brief Private common stuff for Delta encoder and decoder
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_DELTA_PRIVATE_H
+#define LZMA_DELTA_PRIVATE_H
+
+#include "delta_common.h"
+
+typedef struct {
+ /// Next coder in the chain
+ lzma_next_coder next;
+
+ /// Delta distance
+ size_t distance;
+
+ /// Position in history[]
+ uint8_t pos;
+
+ /// Buffer to hold history of the original data
+ uint8_t history[LZMA_DELTA_DIST_MAX];
+} lzma_delta_coder;
+
+
+extern lzma_ret lzma_delta_coder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+#endif
diff --git a/src/liblzma/liblzma.pc.in b/src/liblzma/liblzma.pc.in
new file mode 100644
index 0000000..d077cb7
--- /dev/null
+++ b/src/liblzma/liblzma.pc.in
@@ -0,0 +1,20 @@
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: liblzma
+Description: General purpose data compression library
+URL: @PACKAGE_URL@
+Version: @PACKAGE_VERSION@
+Cflags: -I${includedir}
+Cflags.private: -DLZMA_API_STATIC
+Libs: -L${libdir} -llzma
+Libs.private: @PTHREAD_CFLAGS@ @LIBS@
diff --git a/src/liblzma/liblzma_generic.map b/src/liblzma/liblzma_generic.map
new file mode 100644
index 0000000..bb82167
--- /dev/null
+++ b/src/liblzma/liblzma_generic.map
@@ -0,0 +1,121 @@
+XZ_5.0 {
+global:
+ lzma_alone_decoder;
+ lzma_alone_encoder;
+ lzma_auto_decoder;
+ lzma_block_buffer_bound;
+ lzma_block_buffer_decode;
+ lzma_block_buffer_encode;
+ lzma_block_compressed_size;
+ lzma_block_decoder;
+ lzma_block_encoder;
+ lzma_block_header_decode;
+ lzma_block_header_encode;
+ lzma_block_header_size;
+ lzma_block_total_size;
+ lzma_block_unpadded_size;
+ lzma_check_is_supported;
+ lzma_check_size;
+ lzma_code;
+ lzma_crc32;
+ lzma_crc64;
+ lzma_easy_buffer_encode;
+ lzma_easy_decoder_memusage;
+ lzma_easy_encoder;
+ lzma_easy_encoder_memusage;
+ lzma_end;
+ lzma_filter_decoder_is_supported;
+ lzma_filter_encoder_is_supported;
+ lzma_filter_flags_decode;
+ lzma_filter_flags_encode;
+ lzma_filter_flags_size;
+ lzma_filters_copy;
+ lzma_filters_update;
+ lzma_get_check;
+ lzma_index_append;
+ lzma_index_block_count;
+ lzma_index_buffer_decode;
+ lzma_index_buffer_encode;
+ lzma_index_cat;
+ lzma_index_checks;
+ lzma_index_decoder;
+ lzma_index_dup;
+ lzma_index_encoder;
+ lzma_index_end;
+ lzma_index_file_size;
+ lzma_index_hash_append;
+ lzma_index_hash_decode;
+ lzma_index_hash_end;
+ lzma_index_hash_init;
+ lzma_index_hash_size;
+ lzma_index_init;
+ lzma_index_iter_init;
+ lzma_index_iter_locate;
+ lzma_index_iter_next;
+ lzma_index_iter_rewind;
+ lzma_index_memusage;
+ lzma_index_memused;
+ lzma_index_size;
+ lzma_index_stream_count;
+ lzma_index_stream_flags;
+ lzma_index_stream_padding;
+ lzma_index_stream_size;
+ lzma_index_total_size;
+ lzma_index_uncompressed_size;
+ lzma_lzma_preset;
+ lzma_memlimit_get;
+ lzma_memlimit_set;
+ lzma_memusage;
+ lzma_mf_is_supported;
+ lzma_mode_is_supported;
+ lzma_physmem;
+ lzma_properties_decode;
+ lzma_properties_encode;
+ lzma_properties_size;
+ lzma_raw_buffer_decode;
+ lzma_raw_buffer_encode;
+ lzma_raw_decoder;
+ lzma_raw_decoder_memusage;
+ lzma_raw_encoder;
+ lzma_raw_encoder_memusage;
+ lzma_stream_buffer_bound;
+ lzma_stream_buffer_decode;
+ lzma_stream_buffer_encode;
+ lzma_stream_decoder;
+ lzma_stream_encoder;
+ lzma_stream_flags_compare;
+ lzma_stream_footer_decode;
+ lzma_stream_footer_encode;
+ lzma_stream_header_decode;
+ lzma_stream_header_encode;
+ lzma_version_number;
+ lzma_version_string;
+ lzma_vli_decode;
+ lzma_vli_encode;
+ lzma_vli_size;
+
+local:
+ *;
+};
+
+XZ_5.2 {
+global:
+ lzma_block_uncomp_encode;
+ lzma_cputhreads;
+ lzma_get_progress;
+ lzma_stream_encoder_mt;
+ lzma_stream_encoder_mt_memusage;
+} XZ_5.0;
+
+XZ_5.4 {
+global:
+ lzma_file_info_decoder;
+ lzma_filters_free;
+ lzma_lzip_decoder;
+ lzma_microlzma_decoder;
+ lzma_microlzma_encoder;
+ lzma_stream_decoder_mt;
+ lzma_str_from_filters;
+ lzma_str_list_filters;
+ lzma_str_to_filters;
+} XZ_5.2;
diff --git a/src/liblzma/liblzma_linux.map b/src/liblzma/liblzma_linux.map
new file mode 100644
index 0000000..449f5fd
--- /dev/null
+++ b/src/liblzma/liblzma_linux.map
@@ -0,0 +1,136 @@
+XZ_5.0 {
+global:
+ lzma_alone_decoder;
+ lzma_alone_encoder;
+ lzma_auto_decoder;
+ lzma_block_buffer_bound;
+ lzma_block_buffer_decode;
+ lzma_block_buffer_encode;
+ lzma_block_compressed_size;
+ lzma_block_decoder;
+ lzma_block_encoder;
+ lzma_block_header_decode;
+ lzma_block_header_encode;
+ lzma_block_header_size;
+ lzma_block_total_size;
+ lzma_block_unpadded_size;
+ lzma_check_is_supported;
+ lzma_check_size;
+ lzma_code;
+ lzma_crc32;
+ lzma_crc64;
+ lzma_easy_buffer_encode;
+ lzma_easy_decoder_memusage;
+ lzma_easy_encoder;
+ lzma_easy_encoder_memusage;
+ lzma_end;
+ lzma_filter_decoder_is_supported;
+ lzma_filter_encoder_is_supported;
+ lzma_filter_flags_decode;
+ lzma_filter_flags_encode;
+ lzma_filter_flags_size;
+ lzma_filters_copy;
+ lzma_filters_update;
+ lzma_get_check;
+ lzma_index_append;
+ lzma_index_block_count;
+ lzma_index_buffer_decode;
+ lzma_index_buffer_encode;
+ lzma_index_cat;
+ lzma_index_checks;
+ lzma_index_decoder;
+ lzma_index_dup;
+ lzma_index_encoder;
+ lzma_index_end;
+ lzma_index_file_size;
+ lzma_index_hash_append;
+ lzma_index_hash_decode;
+ lzma_index_hash_end;
+ lzma_index_hash_init;
+ lzma_index_hash_size;
+ lzma_index_init;
+ lzma_index_iter_init;
+ lzma_index_iter_locate;
+ lzma_index_iter_next;
+ lzma_index_iter_rewind;
+ lzma_index_memusage;
+ lzma_index_memused;
+ lzma_index_size;
+ lzma_index_stream_count;
+ lzma_index_stream_flags;
+ lzma_index_stream_padding;
+ lzma_index_stream_size;
+ lzma_index_total_size;
+ lzma_index_uncompressed_size;
+ lzma_lzma_preset;
+ lzma_memlimit_get;
+ lzma_memlimit_set;
+ lzma_memusage;
+ lzma_mf_is_supported;
+ lzma_mode_is_supported;
+ lzma_physmem;
+ lzma_properties_decode;
+ lzma_properties_encode;
+ lzma_properties_size;
+ lzma_raw_buffer_decode;
+ lzma_raw_buffer_encode;
+ lzma_raw_decoder;
+ lzma_raw_decoder_memusage;
+ lzma_raw_encoder;
+ lzma_raw_encoder_memusage;
+ lzma_stream_buffer_bound;
+ lzma_stream_buffer_decode;
+ lzma_stream_buffer_encode;
+ lzma_stream_decoder;
+ lzma_stream_encoder;
+ lzma_stream_flags_compare;
+ lzma_stream_footer_decode;
+ lzma_stream_footer_encode;
+ lzma_stream_header_decode;
+ lzma_stream_header_encode;
+ lzma_version_number;
+ lzma_version_string;
+ lzma_vli_decode;
+ lzma_vli_encode;
+ lzma_vli_size;
+
+local:
+ *;
+};
+
+XZ_5.2 {
+global:
+ lzma_block_uncomp_encode;
+ lzma_cputhreads;
+ lzma_get_progress;
+ lzma_stream_encoder_mt;
+ lzma_stream_encoder_mt_memusage;
+} XZ_5.0;
+
+XZ_5.1.2alpha {
+global:
+ lzma_stream_encoder_mt;
+ lzma_stream_encoder_mt_memusage;
+} XZ_5.0;
+
+XZ_5.2.2 {
+global:
+ lzma_block_uncomp_encode;
+ lzma_cputhreads;
+ lzma_get_progress;
+ lzma_stream_encoder_mt;
+ lzma_stream_encoder_mt_memusage;
+} XZ_5.1.2alpha;
+
+XZ_5.4 {
+global:
+ lzma_file_info_decoder;
+ lzma_filters_free;
+ lzma_lzip_decoder;
+ lzma_microlzma_decoder;
+ lzma_microlzma_encoder;
+ lzma_stream_decoder_mt;
+ lzma_str_from_filters;
+ lzma_str_list_filters;
+ lzma_str_to_filters;
+} XZ_5.2;
diff --git a/src/liblzma/liblzma_w32res.rc b/src/liblzma/liblzma_w32res.rc
new file mode 100644
index 0000000..d4d8159
--- /dev/null
+++ b/src/liblzma/liblzma_w32res.rc
@@ -0,0 +1,12 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#define MY_TYPE VFT_DLL
+#define MY_NAME "liblzma"
+#define MY_SUFFIX ".dll"
+#define MY_DESC "liblzma data compression library"
+#include "common_w32res.rc"
diff --git a/src/liblzma/lz/Makefile.inc b/src/liblzma/lz/Makefile.inc
new file mode 100644
index 0000000..75742a8
--- /dev/null
+++ b/src/liblzma/lz/Makefile.inc
@@ -0,0 +1,22 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+if COND_ENCODER_LZ
+liblzma_la_SOURCES += \
+ lz/lz_encoder.c \
+ lz/lz_encoder.h \
+ lz/lz_encoder_hash.h \
+ lz/lz_encoder_hash_table.h \
+ lz/lz_encoder_mf.c
+endif
+
+
+if COND_DECODER_LZ
+liblzma_la_SOURCES += \
+ lz/lz_decoder.c \
+ lz/lz_decoder.h
+endif
diff --git a/src/liblzma/lz/lz_decoder.c b/src/liblzma/lz/lz_decoder.c
new file mode 100644
index 0000000..06c95c1
--- /dev/null
+++ b/src/liblzma/lz/lz_decoder.c
@@ -0,0 +1,304 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_decoder.c
+/// \brief LZ out window
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+// liblzma supports multiple LZ77-based filters. The LZ part is shared
+// between these filters. The LZ code takes care of dictionary handling
+// and passing the data between filters in the chain. The filter-specific
+// part decodes from the input buffer to the dictionary.
+
+
+#include "lz_decoder.h"
+
+
+typedef struct {
+ /// Dictionary (history buffer)
+ lzma_dict dict;
+
+ /// The actual LZ-based decoder e.g. LZMA
+ lzma_lz_decoder lz;
+
+ /// Next filter in the chain, if any. Note that LZMA and LZMA2 are
+ /// only allowed as the last filter, but the long-range filter in
+ /// future can be in the middle of the chain.
+ lzma_next_coder next;
+
+ /// True if the next filter in the chain has returned LZMA_STREAM_END.
+ bool next_finished;
+
+ /// True if the LZ decoder (e.g. LZMA) has detected end of payload
+ /// marker. This may become true before next_finished becomes true.
+ bool this_finished;
+
+ /// Temporary buffer needed when the LZ-based filter is not the last
+ /// filter in the chain. The output of the next filter is first
+ /// decoded into buffer[], which is then used as input for the actual
+ /// LZ-based decoder.
+ struct {
+ size_t pos;
+ size_t size;
+ uint8_t buffer[LZMA_BUFFER_SIZE];
+ } temp;
+} lzma_coder;
+
+
+static void
+lz_decoder_reset(lzma_coder *coder)
+{
+ coder->dict.pos = 0;
+ coder->dict.full = 0;
+ coder->dict.buf[coder->dict.size - 1] = '\0';
+ coder->dict.need_reset = false;
+ return;
+}
+
+
+static lzma_ret
+decode_buffer(lzma_coder *coder,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size)
+{
+ while (true) {
+ // Wrap the dictionary if needed.
+ if (coder->dict.pos == coder->dict.size)
+ coder->dict.pos = 0;
+
+ // Store the current dictionary position. It is needed to know
+ // where to start copying to the out[] buffer.
+ const size_t dict_start = coder->dict.pos;
+
+ // Calculate how much we allow coder->lz.code() to decode.
+ // It must not decode past the end of the dictionary
+ // buffer, and we don't want it to decode more than is
+ // actually needed to fill the out[] buffer.
+ coder->dict.limit = coder->dict.pos
+ + my_min(out_size - *out_pos,
+ coder->dict.size - coder->dict.pos);
+
+ // Call the coder->lz.code() to do the actual decoding.
+ const lzma_ret ret = coder->lz.code(
+ coder->lz.coder, &coder->dict,
+ in, in_pos, in_size);
+
+ // Copy the decoded data from the dictionary to the out[]
+ // buffer. Do it conditionally because out can be NULL
+ // (in which case copy_size is always 0). Calling memcpy()
+ // with a null-pointer is undefined even if the third
+ // argument is 0.
+ const size_t copy_size = coder->dict.pos - dict_start;
+ assert(copy_size <= out_size - *out_pos);
+
+ if (copy_size > 0)
+ memcpy(out + *out_pos, coder->dict.buf + dict_start,
+ copy_size);
+
+ *out_pos += copy_size;
+
+ // Reset the dictionary if so requested by coder->lz.code().
+ if (coder->dict.need_reset) {
+ lz_decoder_reset(coder);
+
+ // Since we reset dictionary, we don't check if
+ // dictionary became full.
+ if (ret != LZMA_OK || *out_pos == out_size)
+ return ret;
+ } else {
+ // Return if everything got decoded or an error
+ // occurred, or if there's no more data to decode.
+ //
+ // Note that detecting if there's something to decode
+ // is done by looking if dictionary become full
+ // instead of looking if *in_pos == in_size. This
+ // is because it is possible that all the input was
+ // consumed already but some data is pending to be
+ // written to the dictionary.
+ if (ret != LZMA_OK || *out_pos == out_size
+ || coder->dict.pos < coder->dict.size)
+ return ret;
+ }
+ }
+}
+
+
+static lzma_ret
+lz_decode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size,
+ lzma_action action)
+{
+ lzma_coder *coder = coder_ptr;
+
+ if (coder->next.code == NULL)
+ return decode_buffer(coder, in, in_pos, in_size,
+ out, out_pos, out_size);
+
+ // We aren't the last coder in the chain, we need to decode
+ // our input to a temporary buffer.
+ while (*out_pos < out_size) {
+ // Fill the temporary buffer if it is empty.
+ if (!coder->next_finished
+ && coder->temp.pos == coder->temp.size) {
+ coder->temp.pos = 0;
+ coder->temp.size = 0;
+
+ const lzma_ret ret = coder->next.code(
+ coder->next.coder,
+ allocator, in, in_pos, in_size,
+ coder->temp.buffer, &coder->temp.size,
+ LZMA_BUFFER_SIZE, action);
+
+ if (ret == LZMA_STREAM_END)
+ coder->next_finished = true;
+ else if (ret != LZMA_OK || coder->temp.size == 0)
+ return ret;
+ }
+
+ if (coder->this_finished) {
+ if (coder->temp.size != 0)
+ return LZMA_DATA_ERROR;
+
+ if (coder->next_finished)
+ return LZMA_STREAM_END;
+
+ return LZMA_OK;
+ }
+
+ const lzma_ret ret = decode_buffer(coder, coder->temp.buffer,
+ &coder->temp.pos, coder->temp.size,
+ out, out_pos, out_size);
+
+ if (ret == LZMA_STREAM_END)
+ coder->this_finished = true;
+ else if (ret != LZMA_OK)
+ return ret;
+ else if (coder->next_finished && *out_pos < out_size)
+ return LZMA_DATA_ERROR;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+lz_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_coder *coder = coder_ptr;
+
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder->dict.buf, allocator);
+
+ if (coder->lz.end != NULL)
+ coder->lz.end(coder->lz.coder, allocator);
+ else
+ lzma_free(coder->lz.coder, allocator);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+extern lzma_ret
+lzma_lz_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ lzma_ret (*lz_init)(lzma_lz_decoder *lz,
+ const lzma_allocator *allocator,
+ lzma_vli id, const void *options,
+ lzma_lz_options *lz_options))
+{
+ // Allocate the base structure if it isn't already allocated.
+ lzma_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &lz_decode;
+ next->end = &lz_decoder_end;
+
+ coder->dict.buf = NULL;
+ coder->dict.size = 0;
+ coder->lz = LZMA_LZ_DECODER_INIT;
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Allocate and initialize the LZ-based decoder. It will also give
+ // us the dictionary size.
+ lzma_lz_options lz_options;
+ return_if_error(lz_init(&coder->lz, allocator,
+ filters[0].id, filters[0].options, &lz_options));
+
+ // If the dictionary size is very small, increase it to 4096 bytes.
+ // This is to prevent constant wrapping of the dictionary, which
+ // would slow things down. The downside is that since we don't check
+ // separately for the real dictionary size, we may happily accept
+ // corrupt files.
+ if (lz_options.dict_size < 4096)
+ lz_options.dict_size = 4096;
+
+ // Make dictionary size a multiple of 16. Some LZ-based decoders like
+ // LZMA use the lowest bits lzma_dict.pos to know the alignment of the
+ // data. Aligned buffer is also good when memcpying from the
+ // dictionary to the output buffer, since applications are
+ // recommended to give aligned buffers to liblzma.
+ //
+ // Avoid integer overflow.
+ if (lz_options.dict_size > SIZE_MAX - 15)
+ return LZMA_MEM_ERROR;
+
+ lz_options.dict_size = (lz_options.dict_size + 15) & ~((size_t)(15));
+
+ // Allocate and initialize the dictionary.
+ if (coder->dict.size != lz_options.dict_size) {
+ lzma_free(coder->dict.buf, allocator);
+ coder->dict.buf
+ = lzma_alloc(lz_options.dict_size, allocator);
+ if (coder->dict.buf == NULL)
+ return LZMA_MEM_ERROR;
+
+ coder->dict.size = lz_options.dict_size;
+ }
+
+ lz_decoder_reset(next->coder);
+
+ // Use the preset dictionary if it was given to us.
+ if (lz_options.preset_dict != NULL
+ && lz_options.preset_dict_size > 0) {
+ // If the preset dictionary is bigger than the actual
+ // dictionary, copy only the tail.
+ const size_t copy_size = my_min(lz_options.preset_dict_size,
+ lz_options.dict_size);
+ const size_t offset = lz_options.preset_dict_size - copy_size;
+ memcpy(coder->dict.buf, lz_options.preset_dict + offset,
+ copy_size);
+ coder->dict.pos = copy_size;
+ coder->dict.full = copy_size;
+ }
+
+ // Miscellaneous initializations
+ coder->next_finished = false;
+ coder->this_finished = false;
+ coder->temp.pos = 0;
+ coder->temp.size = 0;
+
+ // Initialize the next filter in the chain, if any.
+ return lzma_next_filter_init(&coder->next, allocator, filters + 1);
+}
+
+
+extern uint64_t
+lzma_lz_decoder_memusage(size_t dictionary_size)
+{
+ return sizeof(lzma_coder) + (uint64_t)(dictionary_size);
+}
diff --git a/src/liblzma/lz/lz_decoder.h b/src/liblzma/lz/lz_decoder.h
new file mode 100644
index 0000000..ad80d4d
--- /dev/null
+++ b/src/liblzma/lz/lz_decoder.h
@@ -0,0 +1,234 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_decoder.h
+/// \brief LZ out window
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZ_DECODER_H
+#define LZMA_LZ_DECODER_H
+
+#include "common.h"
+
+
+typedef struct {
+ /// Pointer to the dictionary buffer. It can be an allocated buffer
+ /// internal to liblzma, or it can a be a buffer given by the
+ /// application when in single-call mode (not implemented yet).
+ uint8_t *buf;
+
+ /// Write position in dictionary. The next byte will be written to
+ /// buf[pos].
+ size_t pos;
+
+ /// Indicates how full the dictionary is. This is used by
+ /// dict_is_distance_valid() to detect corrupt files that would
+ /// read beyond the beginning of the dictionary.
+ size_t full;
+
+ /// Write limit
+ size_t limit;
+
+ /// Size of the dictionary
+ size_t size;
+
+ /// True when dictionary should be reset before decoding more data.
+ bool need_reset;
+
+} lzma_dict;
+
+
+typedef struct {
+ size_t dict_size;
+ const uint8_t *preset_dict;
+ size_t preset_dict_size;
+} lzma_lz_options;
+
+
+typedef struct {
+ /// Data specific to the LZ-based decoder
+ void *coder;
+
+ /// Function to decode from in[] to *dict
+ lzma_ret (*code)(void *coder,
+ lzma_dict *restrict dict, const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size);
+
+ void (*reset)(void *coder, const void *options);
+
+ /// Set the uncompressed size. If uncompressed_size == LZMA_VLI_UNKNOWN
+ /// then allow_eopm will always be true.
+ void (*set_uncompressed)(void *coder, lzma_vli uncompressed_size,
+ bool allow_eopm);
+
+ /// Free allocated resources
+ void (*end)(void *coder, const lzma_allocator *allocator);
+
+} lzma_lz_decoder;
+
+
+#define LZMA_LZ_DECODER_INIT \
+ (lzma_lz_decoder){ \
+ .coder = NULL, \
+ .code = NULL, \
+ .reset = NULL, \
+ .set_uncompressed = NULL, \
+ .end = NULL, \
+ }
+
+
+extern lzma_ret lzma_lz_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ lzma_ret (*lz_init)(lzma_lz_decoder *lz,
+ const lzma_allocator *allocator,
+ lzma_vli id, const void *options,
+ lzma_lz_options *lz_options));
+
+extern uint64_t lzma_lz_decoder_memusage(size_t dictionary_size);
+
+
+//////////////////////
+// Inline functions //
+//////////////////////
+
+/// Get a byte from the history buffer.
+static inline uint8_t
+dict_get(const lzma_dict *const dict, const uint32_t distance)
+{
+ return dict->buf[dict->pos - distance - 1
+ + (distance < dict->pos ? 0 : dict->size)];
+}
+
+
+/// Test if dictionary is empty.
+static inline bool
+dict_is_empty(const lzma_dict *const dict)
+{
+ return dict->full == 0;
+}
+
+
+/// Validate the match distance
+static inline bool
+dict_is_distance_valid(const lzma_dict *const dict, const size_t distance)
+{
+ return dict->full > distance;
+}
+
+
+/// Repeat *len bytes at distance.
+static inline bool
+dict_repeat(lzma_dict *dict, uint32_t distance, uint32_t *len)
+{
+ // Don't write past the end of the dictionary.
+ const size_t dict_avail = dict->limit - dict->pos;
+ uint32_t left = my_min(dict_avail, *len);
+ *len -= left;
+
+ // Repeat a block of data from the history. Because memcpy() is faster
+ // than copying byte by byte in a loop, the copying process gets split
+ // into three cases.
+ if (distance < left) {
+ // Source and target areas overlap, thus we can't use
+ // memcpy() nor even memmove() safely.
+ do {
+ dict->buf[dict->pos] = dict_get(dict, distance);
+ ++dict->pos;
+ } while (--left > 0);
+
+ } else if (distance < dict->pos) {
+ // The easiest and fastest case
+ memcpy(dict->buf + dict->pos,
+ dict->buf + dict->pos - distance - 1,
+ left);
+ dict->pos += left;
+
+ } else {
+ // The bigger the dictionary, the more rare this
+ // case occurs. We need to "wrap" the dict, thus
+ // we might need two memcpy() to copy all the data.
+ assert(dict->full == dict->size);
+ const uint32_t copy_pos
+ = dict->pos - distance - 1 + dict->size;
+ uint32_t copy_size = dict->size - copy_pos;
+
+ if (copy_size < left) {
+ memmove(dict->buf + dict->pos, dict->buf + copy_pos,
+ copy_size);
+ dict->pos += copy_size;
+ copy_size = left - copy_size;
+ memcpy(dict->buf + dict->pos, dict->buf, copy_size);
+ dict->pos += copy_size;
+ } else {
+ memmove(dict->buf + dict->pos, dict->buf + copy_pos,
+ left);
+ dict->pos += left;
+ }
+ }
+
+ // Update how full the dictionary is.
+ if (dict->full < dict->pos)
+ dict->full = dict->pos;
+
+ return unlikely(*len != 0);
+}
+
+
+/// Puts one byte into the dictionary. Returns true if the dictionary was
+/// already full and the byte couldn't be added.
+static inline bool
+dict_put(lzma_dict *dict, uint8_t byte)
+{
+ if (unlikely(dict->pos == dict->limit))
+ return true;
+
+ dict->buf[dict->pos++] = byte;
+
+ if (dict->pos > dict->full)
+ dict->full = dict->pos;
+
+ return false;
+}
+
+
+/// Copies arbitrary amount of data into the dictionary.
+static inline void
+dict_write(lzma_dict *restrict dict, const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size,
+ size_t *restrict left)
+{
+ // NOTE: If we are being given more data than the size of the
+ // dictionary, it could be possible to optimize the LZ decoder
+ // so that not everything needs to go through the dictionary.
+ // This shouldn't be very common thing in practice though, and
+ // the slowdown of one extra memcpy() isn't bad compared to how
+ // much time it would have taken if the data were compressed.
+
+ if (in_size - *in_pos > *left)
+ in_size = *in_pos + *left;
+
+ *left -= lzma_bufcpy(in, in_pos, in_size,
+ dict->buf, &dict->pos, dict->limit);
+
+ if (dict->pos > dict->full)
+ dict->full = dict->pos;
+
+ return;
+}
+
+
+static inline void
+dict_reset(lzma_dict *dict)
+{
+ dict->need_reset = true;
+ return;
+}
+
+#endif
diff --git a/src/liblzma/lz/lz_encoder.c b/src/liblzma/lz/lz_encoder.c
new file mode 100644
index 0000000..5489085
--- /dev/null
+++ b/src/liblzma/lz/lz_encoder.c
@@ -0,0 +1,633 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_encoder.c
+/// \brief LZ in window
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lz_encoder.h"
+#include "lz_encoder_hash.h"
+
+// See lz_encoder_hash.h. This is a bit hackish but avoids making
+// endianness a conditional in makefiles.
+#if defined(WORDS_BIGENDIAN) && !defined(HAVE_SMALL)
+# include "lz_encoder_hash_table.h"
+#endif
+
+#include "memcmplen.h"
+
+
+typedef struct {
+ /// LZ-based encoder e.g. LZMA
+ lzma_lz_encoder lz;
+
+ /// History buffer and match finder
+ lzma_mf mf;
+
+ /// Next coder in the chain
+ lzma_next_coder next;
+} lzma_coder;
+
+
+/// \brief Moves the data in the input window to free space for new data
+///
+/// mf->buffer is a sliding input window, which keeps mf->keep_size_before
+/// bytes of input history available all the time. Now and then we need to
+/// "slide" the buffer to make space for the new data to the end of the
+/// buffer. At the same time, data older than keep_size_before is dropped.
+///
+static void
+move_window(lzma_mf *mf)
+{
+ // Align the move to a multiple of 16 bytes. Some LZ-based encoders
+ // like LZMA use the lowest bits of mf->read_pos to know the
+ // alignment of the uncompressed data. We also get better speed
+ // for memmove() with aligned buffers.
+ assert(mf->read_pos > mf->keep_size_before);
+ const uint32_t move_offset
+ = (mf->read_pos - mf->keep_size_before) & ~UINT32_C(15);
+
+ assert(mf->write_pos > move_offset);
+ const size_t move_size = mf->write_pos - move_offset;
+
+ assert(move_offset + move_size <= mf->size);
+
+ memmove(mf->buffer, mf->buffer + move_offset, move_size);
+
+ mf->offset += move_offset;
+ mf->read_pos -= move_offset;
+ mf->read_limit -= move_offset;
+ mf->write_pos -= move_offset;
+
+ return;
+}
+
+
+/// \brief Tries to fill the input window (mf->buffer)
+///
+/// If we are the last encoder in the chain, our input data is in in[].
+/// Otherwise we call the next filter in the chain to process in[] and
+/// write its output to mf->buffer.
+///
+/// This function must not be called once it has returned LZMA_STREAM_END.
+///
+static lzma_ret
+fill_window(lzma_coder *coder, const lzma_allocator *allocator,
+ const uint8_t *in, size_t *in_pos, size_t in_size,
+ lzma_action action)
+{
+ assert(coder->mf.read_pos <= coder->mf.write_pos);
+
+ // Move the sliding window if needed.
+ if (coder->mf.read_pos >= coder->mf.size - coder->mf.keep_size_after)
+ move_window(&coder->mf);
+
+ // Maybe this is ugly, but lzma_mf uses uint32_t for most things
+ // (which I find cleanest), but we need size_t here when filling
+ // the history window.
+ size_t write_pos = coder->mf.write_pos;
+ lzma_ret ret;
+ if (coder->next.code == NULL) {
+ // Not using a filter, simply memcpy() as much as possible.
+ lzma_bufcpy(in, in_pos, in_size, coder->mf.buffer,
+ &write_pos, coder->mf.size);
+
+ ret = action != LZMA_RUN && *in_pos == in_size
+ ? LZMA_STREAM_END : LZMA_OK;
+
+ } else {
+ ret = coder->next.code(coder->next.coder, allocator,
+ in, in_pos, in_size,
+ coder->mf.buffer, &write_pos,
+ coder->mf.size, action);
+ }
+
+ coder->mf.write_pos = write_pos;
+
+ // Silence Valgrind. lzma_memcmplen() can read extra bytes
+ // and Valgrind will give warnings if those bytes are uninitialized
+ // because Valgrind cannot see that the values of the uninitialized
+ // bytes are eventually ignored.
+ memzero(coder->mf.buffer + write_pos, LZMA_MEMCMPLEN_EXTRA);
+
+ // If end of stream has been reached or flushing completed, we allow
+ // the encoder to process all the input (that is, read_pos is allowed
+ // to reach write_pos). Otherwise we keep keep_size_after bytes
+ // available as prebuffer.
+ if (ret == LZMA_STREAM_END) {
+ assert(*in_pos == in_size);
+ ret = LZMA_OK;
+ coder->mf.action = action;
+ coder->mf.read_limit = coder->mf.write_pos;
+
+ } else if (coder->mf.write_pos > coder->mf.keep_size_after) {
+ // This needs to be done conditionally, because if we got
+ // only little new input, there may be too little input
+ // to do any encoding yet.
+ coder->mf.read_limit = coder->mf.write_pos
+ - coder->mf.keep_size_after;
+ }
+
+ // Restart the match finder after finished LZMA_SYNC_FLUSH.
+ if (coder->mf.pending > 0
+ && coder->mf.read_pos < coder->mf.read_limit) {
+ // Match finder may update coder->pending and expects it to
+ // start from zero, so use a temporary variable.
+ const uint32_t pending = coder->mf.pending;
+ coder->mf.pending = 0;
+
+ // Rewind read_pos so that the match finder can hash
+ // the pending bytes.
+ assert(coder->mf.read_pos >= pending);
+ coder->mf.read_pos -= pending;
+
+ // Call the skip function directly instead of using
+ // mf_skip(), since we don't want to touch mf->read_ahead.
+ coder->mf.skip(&coder->mf, pending);
+ }
+
+ return ret;
+}
+
+
+static lzma_ret
+lz_encode(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size, lzma_action action)
+{
+ lzma_coder *coder = coder_ptr;
+
+ while (*out_pos < out_size
+ && (*in_pos < in_size || action != LZMA_RUN)) {
+ // Read more data to coder->mf.buffer if needed.
+ if (coder->mf.action == LZMA_RUN && coder->mf.read_pos
+ >= coder->mf.read_limit)
+ return_if_error(fill_window(coder, allocator,
+ in, in_pos, in_size, action));
+
+ // Encode
+ const lzma_ret ret = coder->lz.code(coder->lz.coder,
+ &coder->mf, out, out_pos, out_size);
+ if (ret != LZMA_OK) {
+ // Setting this to LZMA_RUN for cases when we are
+ // flushing. It doesn't matter when finishing or if
+ // an error occurred.
+ coder->mf.action = LZMA_RUN;
+ return ret;
+ }
+ }
+
+ return LZMA_OK;
+}
+
+
+static bool
+lz_encoder_prepare(lzma_mf *mf, const lzma_allocator *allocator,
+ const lzma_lz_options *lz_options)
+{
+ // For now, the dictionary size is limited to 1.5 GiB. This may grow
+ // in the future if needed, but it needs a little more work than just
+ // changing this check.
+ if (lz_options->dict_size < LZMA_DICT_SIZE_MIN
+ || lz_options->dict_size
+ > (UINT32_C(1) << 30) + (UINT32_C(1) << 29)
+ || lz_options->nice_len > lz_options->match_len_max)
+ return true;
+
+ mf->keep_size_before = lz_options->before_size + lz_options->dict_size;
+
+ mf->keep_size_after = lz_options->after_size
+ + lz_options->match_len_max;
+
+ // To avoid constant memmove()s, allocate some extra space. Since
+ // memmove()s become more expensive when the size of the buffer
+ // increases, we reserve more space when a large dictionary is
+ // used to make the memmove() calls rarer.
+ //
+ // This works with dictionaries up to about 3 GiB. If bigger
+ // dictionary is wanted, some extra work is needed:
+ // - Several variables in lzma_mf have to be changed from uint32_t
+ // to size_t.
+ // - Memory usage calculation needs something too, e.g. use uint64_t
+ // for mf->size.
+ uint32_t reserve = lz_options->dict_size / 2;
+ if (reserve > (UINT32_C(1) << 30))
+ reserve /= 2;
+
+ reserve += (lz_options->before_size + lz_options->match_len_max
+ + lz_options->after_size) / 2 + (UINT32_C(1) << 19);
+
+ const uint32_t old_size = mf->size;
+ mf->size = mf->keep_size_before + reserve + mf->keep_size_after;
+
+ // Deallocate the old history buffer if it exists but has different
+ // size than what is needed now.
+ if (mf->buffer != NULL && old_size != mf->size) {
+ lzma_free(mf->buffer, allocator);
+ mf->buffer = NULL;
+ }
+
+ // Match finder options
+ mf->match_len_max = lz_options->match_len_max;
+ mf->nice_len = lz_options->nice_len;
+
+ // cyclic_size has to stay smaller than 2 Gi. Note that this doesn't
+ // mean limiting dictionary size to less than 2 GiB. With a match
+ // finder that uses multibyte resolution (hashes start at e.g. every
+ // fourth byte), cyclic_size would stay below 2 Gi even when
+ // dictionary size is greater than 2 GiB.
+ //
+ // It would be possible to allow cyclic_size >= 2 Gi, but then we
+ // would need to be careful to use 64-bit types in various places
+ // (size_t could do since we would need bigger than 32-bit address
+ // space anyway). It would also require either zeroing a multigigabyte
+ // buffer at initialization (waste of time and RAM) or allow
+ // normalization in lz_encoder_mf.c to access uninitialized
+ // memory to keep the code simpler. The current way is simple and
+ // still allows pretty big dictionaries, so I don't expect these
+ // limits to change.
+ mf->cyclic_size = lz_options->dict_size + 1;
+
+ // Validate the match finder ID and setup the function pointers.
+ switch (lz_options->match_finder) {
+#ifdef HAVE_MF_HC3
+ case LZMA_MF_HC3:
+ mf->find = &lzma_mf_hc3_find;
+ mf->skip = &lzma_mf_hc3_skip;
+ break;
+#endif
+#ifdef HAVE_MF_HC4
+ case LZMA_MF_HC4:
+ mf->find = &lzma_mf_hc4_find;
+ mf->skip = &lzma_mf_hc4_skip;
+ break;
+#endif
+#ifdef HAVE_MF_BT2
+ case LZMA_MF_BT2:
+ mf->find = &lzma_mf_bt2_find;
+ mf->skip = &lzma_mf_bt2_skip;
+ break;
+#endif
+#ifdef HAVE_MF_BT3
+ case LZMA_MF_BT3:
+ mf->find = &lzma_mf_bt3_find;
+ mf->skip = &lzma_mf_bt3_skip;
+ break;
+#endif
+#ifdef HAVE_MF_BT4
+ case LZMA_MF_BT4:
+ mf->find = &lzma_mf_bt4_find;
+ mf->skip = &lzma_mf_bt4_skip;
+ break;
+#endif
+
+ default:
+ return true;
+ }
+
+ // Calculate the sizes of mf->hash and mf->son.
+ //
+ // NOTE: Since 5.3.5beta the LZMA encoder ensures that nice_len
+ // is big enough for the selected match finder. This makes it
+ // easier for applications as nice_len = 2 will always be accepted
+ // even though the effective value can be slightly bigger.
+ const uint32_t hash_bytes
+ = mf_get_hash_bytes(lz_options->match_finder);
+ assert(hash_bytes <= mf->nice_len);
+
+ const bool is_bt = (lz_options->match_finder & 0x10) != 0;
+ uint32_t hs;
+
+ if (hash_bytes == 2) {
+ hs = 0xFFFF;
+ } else {
+ // Round dictionary size up to the next 2^n - 1 so it can
+ // be used as a hash mask.
+ hs = lz_options->dict_size - 1;
+ hs |= hs >> 1;
+ hs |= hs >> 2;
+ hs |= hs >> 4;
+ hs |= hs >> 8;
+ hs >>= 1;
+ hs |= 0xFFFF;
+
+ if (hs > (UINT32_C(1) << 24)) {
+ if (hash_bytes == 3)
+ hs = (UINT32_C(1) << 24) - 1;
+ else
+ hs >>= 1;
+ }
+ }
+
+ mf->hash_mask = hs;
+
+ ++hs;
+ if (hash_bytes > 2)
+ hs += HASH_2_SIZE;
+ if (hash_bytes > 3)
+ hs += HASH_3_SIZE;
+/*
+ No match finder uses this at the moment.
+ if (mf->hash_bytes > 4)
+ hs += HASH_4_SIZE;
+*/
+
+ const uint32_t old_hash_count = mf->hash_count;
+ const uint32_t old_sons_count = mf->sons_count;
+ mf->hash_count = hs;
+ mf->sons_count = mf->cyclic_size;
+ if (is_bt)
+ mf->sons_count *= 2;
+
+ // Deallocate the old hash array if it exists and has different size
+ // than what is needed now.
+ if (old_hash_count != mf->hash_count
+ || old_sons_count != mf->sons_count) {
+ lzma_free(mf->hash, allocator);
+ mf->hash = NULL;
+
+ lzma_free(mf->son, allocator);
+ mf->son = NULL;
+ }
+
+ // Maximum number of match finder cycles
+ mf->depth = lz_options->depth;
+ if (mf->depth == 0) {
+ if (is_bt)
+ mf->depth = 16 + mf->nice_len / 2;
+ else
+ mf->depth = 4 + mf->nice_len / 4;
+ }
+
+ return false;
+}
+
+
+static bool
+lz_encoder_init(lzma_mf *mf, const lzma_allocator *allocator,
+ const lzma_lz_options *lz_options)
+{
+ // Allocate the history buffer.
+ if (mf->buffer == NULL) {
+ // lzma_memcmplen() is used for the dictionary buffer
+ // so we need to allocate a few extra bytes to prevent
+ // it from reading past the end of the buffer.
+ mf->buffer = lzma_alloc(mf->size + LZMA_MEMCMPLEN_EXTRA,
+ allocator);
+ if (mf->buffer == NULL)
+ return true;
+
+ // Keep Valgrind happy with lzma_memcmplen() and initialize
+ // the extra bytes whose value may get read but which will
+ // effectively get ignored.
+ memzero(mf->buffer + mf->size, LZMA_MEMCMPLEN_EXTRA);
+ }
+
+ // Use cyclic_size as initial mf->offset. This allows
+ // avoiding a few branches in the match finders. The downside is
+ // that match finder needs to be normalized more often, which may
+ // hurt performance with huge dictionaries.
+ mf->offset = mf->cyclic_size;
+ mf->read_pos = 0;
+ mf->read_ahead = 0;
+ mf->read_limit = 0;
+ mf->write_pos = 0;
+ mf->pending = 0;
+
+#if UINT32_MAX >= SIZE_MAX / 4
+ // Check for integer overflow. (Huge dictionaries are not
+ // possible on 32-bit CPU.)
+ if (mf->hash_count > SIZE_MAX / sizeof(uint32_t)
+ || mf->sons_count > SIZE_MAX / sizeof(uint32_t))
+ return true;
+#endif
+
+ // Allocate and initialize the hash table. Since EMPTY_HASH_VALUE
+ // is zero, we can use lzma_alloc_zero() or memzero() for mf->hash.
+ //
+ // We don't need to initialize mf->son, but not doing that may
+ // make Valgrind complain in normalization (see normalize() in
+ // lz_encoder_mf.c). Skipping the initialization is *very* good
+ // when big dictionary is used but only small amount of data gets
+ // actually compressed: most of the mf->son won't get actually
+ // allocated by the kernel, so we avoid wasting RAM and improve
+ // initialization speed a lot.
+ if (mf->hash == NULL) {
+ mf->hash = lzma_alloc_zero(mf->hash_count * sizeof(uint32_t),
+ allocator);
+ mf->son = lzma_alloc(mf->sons_count * sizeof(uint32_t),
+ allocator);
+
+ if (mf->hash == NULL || mf->son == NULL) {
+ lzma_free(mf->hash, allocator);
+ mf->hash = NULL;
+
+ lzma_free(mf->son, allocator);
+ mf->son = NULL;
+
+ return true;
+ }
+ } else {
+/*
+ for (uint32_t i = 0; i < mf->hash_count; ++i)
+ mf->hash[i] = EMPTY_HASH_VALUE;
+*/
+ memzero(mf->hash, mf->hash_count * sizeof(uint32_t));
+ }
+
+ mf->cyclic_pos = 0;
+
+ // Handle preset dictionary.
+ if (lz_options->preset_dict != NULL
+ && lz_options->preset_dict_size > 0) {
+ // If the preset dictionary is bigger than the actual
+ // dictionary, use only the tail.
+ mf->write_pos = my_min(lz_options->preset_dict_size, mf->size);
+ memcpy(mf->buffer, lz_options->preset_dict
+ + lz_options->preset_dict_size - mf->write_pos,
+ mf->write_pos);
+ mf->action = LZMA_SYNC_FLUSH;
+ mf->skip(mf, mf->write_pos);
+ }
+
+ mf->action = LZMA_RUN;
+
+ return false;
+}
+
+
+extern uint64_t
+lzma_lz_encoder_memusage(const lzma_lz_options *lz_options)
+{
+ // Old buffers must not exist when calling lz_encoder_prepare().
+ lzma_mf mf = {
+ .buffer = NULL,
+ .hash = NULL,
+ .son = NULL,
+ .hash_count = 0,
+ .sons_count = 0,
+ };
+
+ // Setup the size information into mf.
+ if (lz_encoder_prepare(&mf, NULL, lz_options))
+ return UINT64_MAX;
+
+ // Calculate the memory usage.
+ return ((uint64_t)(mf.hash_count) + mf.sons_count) * sizeof(uint32_t)
+ + mf.size + sizeof(lzma_coder);
+}
+
+
+static void
+lz_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_coder *coder = coder_ptr;
+
+ lzma_next_end(&coder->next, allocator);
+
+ lzma_free(coder->mf.son, allocator);
+ lzma_free(coder->mf.hash, allocator);
+ lzma_free(coder->mf.buffer, allocator);
+
+ if (coder->lz.end != NULL)
+ coder->lz.end(coder->lz.coder, allocator);
+ else
+ lzma_free(coder->lz.coder, allocator);
+
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+lz_encoder_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters_null lzma_attribute((__unused__)),
+ const lzma_filter *reversed_filters)
+{
+ lzma_coder *coder = coder_ptr;
+
+ if (coder->lz.options_update == NULL)
+ return LZMA_PROG_ERROR;
+
+ return_if_error(coder->lz.options_update(
+ coder->lz.coder, reversed_filters));
+
+ return lzma_next_filter_update(
+ &coder->next, allocator, reversed_filters + 1);
+}
+
+
+static lzma_ret
+lz_encoder_set_out_limit(void *coder_ptr, uint64_t *uncomp_size,
+ uint64_t out_limit)
+{
+ lzma_coder *coder = coder_ptr;
+
+ // This is supported only if there are no other filters chained.
+ if (coder->next.code == NULL && coder->lz.set_out_limit != NULL)
+ return coder->lz.set_out_limit(
+ coder->lz.coder, uncomp_size, out_limit);
+
+ return LZMA_OPTIONS_ERROR;
+}
+
+
+extern lzma_ret
+lzma_lz_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ lzma_ret (*lz_init)(lzma_lz_encoder *lz,
+ const lzma_allocator *allocator,
+ lzma_vli id, const void *options,
+ lzma_lz_options *lz_options))
+{
+#if defined(HAVE_SMALL) && !defined(HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR)
+ // We need that the CRC32 table has been initialized.
+ lzma_crc32_init();
+#endif
+
+ // Allocate and initialize the base data structure.
+ lzma_coder *coder = next->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &lz_encode;
+ next->end = &lz_encoder_end;
+ next->update = &lz_encoder_update;
+ next->set_out_limit = &lz_encoder_set_out_limit;
+
+ coder->lz.coder = NULL;
+ coder->lz.code = NULL;
+ coder->lz.end = NULL;
+
+ // mf.size is initialized to silence Valgrind
+ // when used on optimized binaries (GCC may reorder
+ // code in a way that Valgrind gets unhappy).
+ coder->mf.buffer = NULL;
+ coder->mf.size = 0;
+ coder->mf.hash = NULL;
+ coder->mf.son = NULL;
+ coder->mf.hash_count = 0;
+ coder->mf.sons_count = 0;
+
+ coder->next = LZMA_NEXT_CODER_INIT;
+ }
+
+ // Initialize the LZ-based encoder.
+ lzma_lz_options lz_options;
+ return_if_error(lz_init(&coder->lz, allocator,
+ filters[0].id, filters[0].options, &lz_options));
+
+ // Setup the size information into coder->mf and deallocate
+ // old buffers if they have wrong size.
+ if (lz_encoder_prepare(&coder->mf, allocator, &lz_options))
+ return LZMA_OPTIONS_ERROR;
+
+ // Allocate new buffers if needed, and do the rest of
+ // the initialization.
+ if (lz_encoder_init(&coder->mf, allocator, &lz_options))
+ return LZMA_MEM_ERROR;
+
+ // Initialize the next filter in the chain, if any.
+ return lzma_next_filter_init(&coder->next, allocator, filters + 1);
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_mf_is_supported(lzma_match_finder mf)
+{
+ switch (mf) {
+#ifdef HAVE_MF_HC3
+ case LZMA_MF_HC3:
+ return true;
+#endif
+#ifdef HAVE_MF_HC4
+ case LZMA_MF_HC4:
+ return true;
+#endif
+#ifdef HAVE_MF_BT2
+ case LZMA_MF_BT2:
+ return true;
+#endif
+#ifdef HAVE_MF_BT3
+ case LZMA_MF_BT3:
+ return true;
+#endif
+#ifdef HAVE_MF_BT4
+ case LZMA_MF_BT4:
+ return true;
+#endif
+ default:
+ return false;
+ }
+}
diff --git a/src/liblzma/lz/lz_encoder.h b/src/liblzma/lz/lz_encoder.h
new file mode 100644
index 0000000..ffcba02
--- /dev/null
+++ b/src/liblzma/lz/lz_encoder.h
@@ -0,0 +1,341 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_encoder.h
+/// \brief LZ in window and match finder API
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZ_ENCODER_H
+#define LZMA_LZ_ENCODER_H
+
+#include "common.h"
+
+
+/// A table of these is used by the LZ-based encoder to hold
+/// the length-distance pairs found by the match finder.
+typedef struct {
+ uint32_t len;
+ uint32_t dist;
+} lzma_match;
+
+
+typedef struct lzma_mf_s lzma_mf;
+struct lzma_mf_s {
+ ///////////////
+ // In Window //
+ ///////////////
+
+ /// Pointer to buffer with data to be compressed
+ uint8_t *buffer;
+
+ /// Total size of the allocated buffer (that is, including all
+ /// the extra space)
+ uint32_t size;
+
+ /// Number of bytes that must be kept available in our input history.
+ /// That is, once keep_size_before bytes have been processed,
+ /// buffer[read_pos - keep_size_before] is the oldest byte that
+ /// must be available for reading.
+ uint32_t keep_size_before;
+
+ /// Number of bytes that must be kept in buffer after read_pos.
+ /// That is, read_pos <= write_pos - keep_size_after as long as
+ /// action is LZMA_RUN; when action != LZMA_RUN, read_pos is allowed
+ /// to reach write_pos so that the last bytes get encoded too.
+ uint32_t keep_size_after;
+
+ /// Match finders store locations of matches using 32-bit integers.
+ /// To avoid adjusting several megabytes of integers every time the
+ /// input window is moved with move_window, we only adjust the
+ /// offset of the buffer. Thus, buffer[value_in_hash_table - offset]
+ /// is the byte pointed by value_in_hash_table.
+ uint32_t offset;
+
+ /// buffer[read_pos] is the next byte to run through the match
+ /// finder. This is incremented in the match finder once the byte
+ /// has been processed.
+ uint32_t read_pos;
+
+ /// Number of bytes that have been ran through the match finder, but
+ /// which haven't been encoded by the LZ-based encoder yet.
+ uint32_t read_ahead;
+
+ /// As long as read_pos is less than read_limit, there is enough
+ /// input available in buffer for at least one encoding loop.
+ ///
+ /// Because of the stateful API, read_limit may and will get greater
+ /// than read_pos quite often. This is taken into account when
+ /// calculating the value for keep_size_after.
+ uint32_t read_limit;
+
+ /// buffer[write_pos] is the first byte that doesn't contain valid
+ /// uncompressed data; that is, the next input byte will be copied
+ /// to buffer[write_pos].
+ uint32_t write_pos;
+
+ /// Number of bytes not hashed before read_pos. This is needed to
+ /// restart the match finder after LZMA_SYNC_FLUSH.
+ uint32_t pending;
+
+ //////////////////
+ // Match Finder //
+ //////////////////
+
+ /// Find matches. Returns the number of distance-length pairs written
+ /// to the matches array. This is called only via lzma_mf_find().
+ uint32_t (*find)(lzma_mf *mf, lzma_match *matches);
+
+ /// Skips num bytes. This is like find() but doesn't make the
+ /// distance-length pairs available, thus being a little faster.
+ /// This is called only via mf_skip().
+ void (*skip)(lzma_mf *mf, uint32_t num);
+
+ uint32_t *hash;
+ uint32_t *son;
+ uint32_t cyclic_pos;
+ uint32_t cyclic_size; // Must be dictionary size + 1.
+ uint32_t hash_mask;
+
+ /// Maximum number of loops in the match finder
+ uint32_t depth;
+
+ /// Maximum length of a match that the match finder will try to find.
+ uint32_t nice_len;
+
+ /// Maximum length of a match supported by the LZ-based encoder.
+ /// If the longest match found by the match finder is nice_len,
+ /// mf_find() tries to expand it up to match_len_max bytes.
+ uint32_t match_len_max;
+
+ /// When running out of input, binary tree match finders need to know
+ /// if it is due to flushing or finishing. The action is used also
+ /// by the LZ-based encoders themselves.
+ lzma_action action;
+
+ /// Number of elements in hash[]
+ uint32_t hash_count;
+
+ /// Number of elements in son[]
+ uint32_t sons_count;
+};
+
+
+typedef struct {
+ /// Extra amount of data to keep available before the "actual"
+ /// dictionary.
+ size_t before_size;
+
+ /// Size of the history buffer
+ size_t dict_size;
+
+ /// Extra amount of data to keep available after the "actual"
+ /// dictionary.
+ size_t after_size;
+
+ /// Maximum length of a match that the LZ-based encoder can accept.
+ /// This is used to extend matches of length nice_len to the
+ /// maximum possible length.
+ size_t match_len_max;
+
+ /// Match finder will search matches up to this length.
+ /// This must be less than or equal to match_len_max.
+ size_t nice_len;
+
+ /// Type of the match finder to use
+ lzma_match_finder match_finder;
+
+ /// Maximum search depth
+ uint32_t depth;
+
+ /// TODO: Comment
+ const uint8_t *preset_dict;
+
+ uint32_t preset_dict_size;
+
+} lzma_lz_options;
+
+
+// The total usable buffer space at any moment outside the match finder:
+// before_size + dict_size + after_size + match_len_max
+//
+// In reality, there's some extra space allocated to prevent the number of
+// memmove() calls reasonable. The bigger the dict_size is, the bigger
+// this extra buffer will be since with bigger dictionaries memmove() would
+// also take longer.
+//
+// A single encoder loop in the LZ-based encoder may call the match finder
+// (mf_find() or mf_skip()) at most after_size times. In other words,
+// a single encoder loop may increment lzma_mf.read_pos at most after_size
+// times. Since matches are looked up to
+// lzma_mf.buffer[lzma_mf.read_pos + match_len_max - 1], the total
+// amount of extra buffer needed after dict_size becomes
+// after_size + match_len_max.
+//
+// before_size has two uses. The first one is to keep literals available
+// in cases when the LZ-based encoder has made some read ahead.
+// TODO: Maybe this could be changed by making the LZ-based encoders to
+// store the actual literals as they do with length-distance pairs.
+//
+// Algorithms such as LZMA2 first try to compress a chunk, and then check
+// if the encoded result is smaller than the uncompressed one. If the chunk
+// was incompressible, it is better to store it in uncompressed form in
+// the output stream. To do this, the whole uncompressed chunk has to be
+// still available in the history buffer. before_size achieves that.
+
+
+typedef struct {
+ /// Data specific to the LZ-based encoder
+ void *coder;
+
+ /// Function to encode from *dict to out[]
+ lzma_ret (*code)(void *coder,
+ lzma_mf *restrict mf, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size);
+
+ /// Free allocated resources
+ void (*end)(void *coder, const lzma_allocator *allocator);
+
+ /// Update the options in the middle of the encoding.
+ lzma_ret (*options_update)(void *coder, const lzma_filter *filter);
+
+ /// Set maximum allowed output size
+ lzma_ret (*set_out_limit)(void *coder, uint64_t *uncomp_size,
+ uint64_t out_limit);
+
+} lzma_lz_encoder;
+
+
+// Basic steps:
+// 1. Input gets copied into the dictionary.
+// 2. Data in dictionary gets run through the match finder byte by byte.
+// 3. The literals and matches are encoded using e.g. LZMA.
+//
+// The bytes that have been ran through the match finder, but not encoded yet,
+// are called `read ahead'.
+
+
+/// Get how many bytes the match finder hashes in its initial step.
+/// This is also the minimum nice_len value with the match finder.
+static inline uint32_t
+mf_get_hash_bytes(lzma_match_finder match_finder)
+{
+ return (uint32_t)match_finder & 0x0F;
+}
+
+
+/// Get pointer to the first byte not ran through the match finder
+static inline const uint8_t *
+mf_ptr(const lzma_mf *mf)
+{
+ return mf->buffer + mf->read_pos;
+}
+
+
+/// Get the number of bytes that haven't been ran through the match finder yet.
+static inline uint32_t
+mf_avail(const lzma_mf *mf)
+{
+ return mf->write_pos - mf->read_pos;
+}
+
+
+/// Get the number of bytes that haven't been encoded yet (some of these
+/// bytes may have been ran through the match finder though).
+static inline uint32_t
+mf_unencoded(const lzma_mf *mf)
+{
+ return mf->write_pos - mf->read_pos + mf->read_ahead;
+}
+
+
+/// Calculate the absolute offset from the beginning of the most recent
+/// dictionary reset. Only the lowest four bits are important, so there's no
+/// problem that we don't know the 64-bit size of the data encoded so far.
+///
+/// NOTE: When moving the input window, we need to do it so that the lowest
+/// bits of dict->read_pos are not modified to keep this macro working
+/// as intended.
+static inline uint32_t
+mf_position(const lzma_mf *mf)
+{
+ return mf->read_pos - mf->read_ahead;
+}
+
+
+/// Since everything else begins with mf_, use it also for lzma_mf_find().
+#define mf_find lzma_mf_find
+
+
+/// Skip the given number of bytes. This is used when a good match was found.
+/// For example, if mf_find() finds a match of 200 bytes long, the first byte
+/// of that match was already consumed by mf_find(), and the rest 199 bytes
+/// have to be skipped with mf_skip(mf, 199).
+static inline void
+mf_skip(lzma_mf *mf, uint32_t amount)
+{
+ if (amount != 0) {
+ mf->skip(mf, amount);
+ mf->read_ahead += amount;
+ }
+}
+
+
+/// Copies at most *left number of bytes from the history buffer
+/// to out[]. This is needed by LZMA2 to encode uncompressed chunks.
+static inline void
+mf_read(lzma_mf *mf, uint8_t *out, size_t *out_pos, size_t out_size,
+ size_t *left)
+{
+ const size_t out_avail = out_size - *out_pos;
+ const size_t copy_size = my_min(out_avail, *left);
+
+ assert(mf->read_ahead == 0);
+ assert(mf->read_pos >= *left);
+
+ memcpy(out + *out_pos, mf->buffer + mf->read_pos - *left,
+ copy_size);
+
+ *out_pos += copy_size;
+ *left -= copy_size;
+ return;
+}
+
+
+extern lzma_ret lzma_lz_encoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ lzma_ret (*lz_init)(lzma_lz_encoder *lz,
+ const lzma_allocator *allocator,
+ lzma_vli id, const void *options,
+ lzma_lz_options *lz_options));
+
+
+extern uint64_t lzma_lz_encoder_memusage(const lzma_lz_options *lz_options);
+
+
+// These are only for LZ encoder's internal use.
+extern uint32_t lzma_mf_find(
+ lzma_mf *mf, uint32_t *count, lzma_match *matches);
+
+extern uint32_t lzma_mf_hc3_find(lzma_mf *dict, lzma_match *matches);
+extern void lzma_mf_hc3_skip(lzma_mf *dict, uint32_t amount);
+
+extern uint32_t lzma_mf_hc4_find(lzma_mf *dict, lzma_match *matches);
+extern void lzma_mf_hc4_skip(lzma_mf *dict, uint32_t amount);
+
+extern uint32_t lzma_mf_bt2_find(lzma_mf *dict, lzma_match *matches);
+extern void lzma_mf_bt2_skip(lzma_mf *dict, uint32_t amount);
+
+extern uint32_t lzma_mf_bt3_find(lzma_mf *dict, lzma_match *matches);
+extern void lzma_mf_bt3_skip(lzma_mf *dict, uint32_t amount);
+
+extern uint32_t lzma_mf_bt4_find(lzma_mf *dict, lzma_match *matches);
+extern void lzma_mf_bt4_skip(lzma_mf *dict, uint32_t amount);
+
+#endif
diff --git a/src/liblzma/lz/lz_encoder_hash.h b/src/liblzma/lz/lz_encoder_hash.h
new file mode 100644
index 0000000..4d9971a
--- /dev/null
+++ b/src/liblzma/lz/lz_encoder_hash.h
@@ -0,0 +1,109 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_encoder_hash.h
+/// \brief Hash macros for match finders
+//
+// Author: Igor Pavlov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZ_ENCODER_HASH_H
+#define LZMA_LZ_ENCODER_HASH_H
+
+#if defined(WORDS_BIGENDIAN) && !defined(HAVE_SMALL)
+ // This is to make liblzma produce the same output on big endian
+ // systems that it does on little endian systems. lz_encoder.c
+ // takes care of including the actual table.
+ lzma_attr_visibility_hidden
+ extern const uint32_t lzma_lz_hash_table[256];
+# define hash_table lzma_lz_hash_table
+#else
+# include "check.h"
+# define hash_table lzma_crc32_table[0]
+#endif
+
+#define HASH_2_SIZE (UINT32_C(1) << 10)
+#define HASH_3_SIZE (UINT32_C(1) << 16)
+#define HASH_4_SIZE (UINT32_C(1) << 20)
+
+#define HASH_2_MASK (HASH_2_SIZE - 1)
+#define HASH_3_MASK (HASH_3_SIZE - 1)
+#define HASH_4_MASK (HASH_4_SIZE - 1)
+
+#define FIX_3_HASH_SIZE (HASH_2_SIZE)
+#define FIX_4_HASH_SIZE (HASH_2_SIZE + HASH_3_SIZE)
+#define FIX_5_HASH_SIZE (HASH_2_SIZE + HASH_3_SIZE + HASH_4_SIZE)
+
+// Endianness doesn't matter in hash_2_calc() (no effect on the output).
+#ifdef TUKLIB_FAST_UNALIGNED_ACCESS
+# define hash_2_calc() \
+ const uint32_t hash_value = read16ne(cur)
+#else
+# define hash_2_calc() \
+ const uint32_t hash_value \
+ = (uint32_t)(cur[0]) | ((uint32_t)(cur[1]) << 8)
+#endif
+
+#define hash_3_calc() \
+ const uint32_t temp = hash_table[cur[0]] ^ cur[1]; \
+ const uint32_t hash_2_value = temp & HASH_2_MASK; \
+ const uint32_t hash_value \
+ = (temp ^ ((uint32_t)(cur[2]) << 8)) & mf->hash_mask
+
+#define hash_4_calc() \
+ const uint32_t temp = hash_table[cur[0]] ^ cur[1]; \
+ const uint32_t hash_2_value = temp & HASH_2_MASK; \
+ const uint32_t hash_3_value \
+ = (temp ^ ((uint32_t)(cur[2]) << 8)) & HASH_3_MASK; \
+ const uint32_t hash_value = (temp ^ ((uint32_t)(cur[2]) << 8) \
+ ^ (hash_table[cur[3]] << 5)) & mf->hash_mask
+
+
+// The following are not currently used.
+
+#define hash_5_calc() \
+ const uint32_t temp = hash_table[cur[0]] ^ cur[1]; \
+ const uint32_t hash_2_value = temp & HASH_2_MASK; \
+ const uint32_t hash_3_value \
+ = (temp ^ ((uint32_t)(cur[2]) << 8)) & HASH_3_MASK; \
+ uint32_t hash_4_value = (temp ^ ((uint32_t)(cur[2]) << 8) ^ \
+ ^ hash_table[cur[3]] << 5); \
+ const uint32_t hash_value \
+ = (hash_4_value ^ (hash_table[cur[4]] << 3)) \
+ & mf->hash_mask; \
+ hash_4_value &= HASH_4_MASK
+
+/*
+#define hash_zip_calc() \
+ const uint32_t hash_value \
+ = (((uint32_t)(cur[0]) | ((uint32_t)(cur[1]) << 8)) \
+ ^ hash_table[cur[2]]) & 0xFFFF
+*/
+
+#define hash_zip_calc() \
+ const uint32_t hash_value \
+ = (((uint32_t)(cur[2]) | ((uint32_t)(cur[0]) << 8)) \
+ ^ hash_table[cur[1]]) & 0xFFFF
+
+#define mt_hash_2_calc() \
+ const uint32_t hash_2_value \
+ = (hash_table[cur[0]] ^ cur[1]) & HASH_2_MASK
+
+#define mt_hash_3_calc() \
+ const uint32_t temp = hash_table[cur[0]] ^ cur[1]; \
+ const uint32_t hash_2_value = temp & HASH_2_MASK; \
+ const uint32_t hash_3_value \
+ = (temp ^ ((uint32_t)(cur[2]) << 8)) & HASH_3_MASK
+
+#define mt_hash_4_calc() \
+ const uint32_t temp = hash_table[cur[0]] ^ cur[1]; \
+ const uint32_t hash_2_value = temp & HASH_2_MASK; \
+ const uint32_t hash_3_value \
+ = (temp ^ ((uint32_t)(cur[2]) << 8)) & HASH_3_MASK; \
+ const uint32_t hash_4_value = (temp ^ ((uint32_t)(cur[2]) << 8) ^ \
+ (hash_table[cur[3]] << 5)) & HASH_4_MASK
+
+#endif
diff --git a/src/liblzma/lz/lz_encoder_hash_table.h b/src/liblzma/lz/lz_encoder_hash_table.h
new file mode 100644
index 0000000..8c51717
--- /dev/null
+++ b/src/liblzma/lz/lz_encoder_hash_table.h
@@ -0,0 +1,68 @@
+/* This file has been automatically generated by crc32_tablegen.c. */
+
+const uint32_t lzma_lz_hash_table[256] = {
+ 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
+ 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
+ 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+ 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
+ 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
+ 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+ 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
+ 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
+ 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+ 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
+ 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
+ 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+ 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
+ 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
+ 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+ 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
+ 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
+ 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+ 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
+ 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
+ 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+ 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
+ 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
+ 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+ 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
+ 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
+ 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+ 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
+ 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
+ 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+ 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
+ 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
+ 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+ 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
+ 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
+ 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+ 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
+ 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
+ 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+ 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
+ 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
+ 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+ 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
+ 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
+ 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+ 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
+ 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
+ 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+ 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
+ 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
+ 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+ 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
+ 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
+ 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+ 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
+ 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
+ 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+ 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
+ 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
+ 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+ 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
+ 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
+ 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+ 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+};
diff --git a/src/liblzma/lz/lz_encoder_mf.c b/src/liblzma/lz/lz_encoder_mf.c
new file mode 100644
index 0000000..1fdc2d7
--- /dev/null
+++ b/src/liblzma/lz/lz_encoder_mf.c
@@ -0,0 +1,745 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lz_encoder_mf.c
+/// \brief Match finders
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lz_encoder.h"
+#include "lz_encoder_hash.h"
+#include "memcmplen.h"
+
+
+/// \brief Find matches starting from the current byte
+///
+/// \return The length of the longest match found
+extern uint32_t
+lzma_mf_find(lzma_mf *mf, uint32_t *count_ptr, lzma_match *matches)
+{
+ // Call the match finder. It returns the number of length-distance
+ // pairs found.
+ // FIXME: Minimum count is zero, what _exactly_ is the maximum?
+ const uint32_t count = mf->find(mf, matches);
+
+ // Length of the longest match; assume that no matches were found
+ // and thus the maximum length is zero.
+ uint32_t len_best = 0;
+
+ if (count > 0) {
+#ifndef NDEBUG
+ // Validate the matches.
+ for (uint32_t i = 0; i < count; ++i) {
+ assert(matches[i].len <= mf->nice_len);
+ assert(matches[i].dist < mf->read_pos);
+ assert(memcmp(mf_ptr(mf) - 1,
+ mf_ptr(mf) - matches[i].dist - 2,
+ matches[i].len) == 0);
+ }
+#endif
+
+ // The last used element in the array contains
+ // the longest match.
+ len_best = matches[count - 1].len;
+
+ // If a match of maximum search length was found, try to
+ // extend the match to maximum possible length.
+ if (len_best == mf->nice_len) {
+ // The limit for the match length is either the
+ // maximum match length supported by the LZ-based
+ // encoder or the number of bytes left in the
+ // dictionary, whichever is smaller.
+ uint32_t limit = mf_avail(mf) + 1;
+ if (limit > mf->match_len_max)
+ limit = mf->match_len_max;
+
+ // Pointer to the byte we just ran through
+ // the match finder.
+ const uint8_t *p1 = mf_ptr(mf) - 1;
+
+ // Pointer to the beginning of the match. We need -1
+ // here because the match distances are zero based.
+ const uint8_t *p2 = p1 - matches[count - 1].dist - 1;
+
+ len_best = lzma_memcmplen(p1, p2, len_best, limit);
+ }
+ }
+
+ *count_ptr = count;
+
+ // Finally update the read position to indicate that match finder was
+ // run for this dictionary offset.
+ ++mf->read_ahead;
+
+ return len_best;
+}
+
+
+/// Hash value to indicate unused element in the hash. Since we start the
+/// positions from dict_size + 1, zero is always too far to qualify
+/// as usable match position.
+#define EMPTY_HASH_VALUE 0
+
+
+/// Normalization must be done when lzma_mf.offset + lzma_mf.read_pos
+/// reaches MUST_NORMALIZE_POS.
+#define MUST_NORMALIZE_POS UINT32_MAX
+
+
+/// \brief Normalizes hash values
+///
+/// The hash arrays store positions of match candidates. The positions are
+/// relative to an arbitrary offset that is not the same as the absolute
+/// offset in the input stream. The relative position of the current byte
+/// is lzma_mf.offset + lzma_mf.read_pos. The distances of the matches are
+/// the differences of the current read position and the position found from
+/// the hash.
+///
+/// To prevent integer overflows of the offsets stored in the hash arrays,
+/// we need to "normalize" the stored values now and then. During the
+/// normalization, we drop values that indicate distance greater than the
+/// dictionary size, thus making space for new values.
+static void
+normalize(lzma_mf *mf)
+{
+ assert(mf->read_pos + mf->offset == MUST_NORMALIZE_POS);
+
+ // In future we may not want to touch the lowest bits, because there
+ // may be match finders that use larger resolution than one byte.
+ const uint32_t subvalue
+ = (MUST_NORMALIZE_POS - mf->cyclic_size);
+ // & ~((UINT32_C(1) << 10) - 1);
+
+ for (uint32_t i = 0; i < mf->hash_count; ++i) {
+ // If the distance is greater than the dictionary size,
+ // we can simply mark the hash element as empty.
+ if (mf->hash[i] <= subvalue)
+ mf->hash[i] = EMPTY_HASH_VALUE;
+ else
+ mf->hash[i] -= subvalue;
+ }
+
+ for (uint32_t i = 0; i < mf->sons_count; ++i) {
+ // Do the same for mf->son.
+ //
+ // NOTE: There may be uninitialized elements in mf->son.
+ // Valgrind may complain that the "if" below depends on
+ // an uninitialized value. In this case it is safe to ignore
+ // the warning. See also the comments in lz_encoder_init()
+ // in lz_encoder.c.
+ if (mf->son[i] <= subvalue)
+ mf->son[i] = EMPTY_HASH_VALUE;
+ else
+ mf->son[i] -= subvalue;
+ }
+
+ // Update offset to match the new locations.
+ mf->offset -= subvalue;
+
+ return;
+}
+
+
+/// Mark the current byte as processed from point of view of the match finder.
+static void
+move_pos(lzma_mf *mf)
+{
+ if (++mf->cyclic_pos == mf->cyclic_size)
+ mf->cyclic_pos = 0;
+
+ ++mf->read_pos;
+ assert(mf->read_pos <= mf->write_pos);
+
+ if (unlikely(mf->read_pos + mf->offset == UINT32_MAX))
+ normalize(mf);
+}
+
+
+/// When flushing, we cannot run the match finder unless there is nice_len
+/// bytes available in the dictionary. Instead, we skip running the match
+/// finder (indicating that no match was found), and count how many bytes we
+/// have ignored this way.
+///
+/// When new data is given after the flushing was completed, the match finder
+/// is restarted by rewinding mf->read_pos backwards by mf->pending. Then
+/// the missed bytes are added to the hash using the match finder's skip
+/// function (with small amount of input, it may start using mf->pending
+/// again if flushing).
+///
+/// Due to this rewinding, we don't touch cyclic_pos or test for
+/// normalization. It will be done when the match finder's skip function
+/// catches up after a flush.
+static void
+move_pending(lzma_mf *mf)
+{
+ ++mf->read_pos;
+ assert(mf->read_pos <= mf->write_pos);
+ ++mf->pending;
+}
+
+
+/// Calculate len_limit and determine if there is enough input to run
+/// the actual match finder code. Sets up "cur" and "pos". This macro
+/// is used by all find functions and binary tree skip functions. Hash
+/// chain skip function doesn't need len_limit so a simpler code is used
+/// in them.
+#define header(is_bt, len_min, ret_op) \
+ uint32_t len_limit = mf_avail(mf); \
+ if (mf->nice_len <= len_limit) { \
+ len_limit = mf->nice_len; \
+ } else if (len_limit < (len_min) \
+ || (is_bt && mf->action == LZMA_SYNC_FLUSH)) { \
+ assert(mf->action != LZMA_RUN); \
+ move_pending(mf); \
+ ret_op; \
+ } \
+ const uint8_t *cur = mf_ptr(mf); \
+ const uint32_t pos = mf->read_pos + mf->offset
+
+
+/// Header for find functions. "return 0" indicates that zero matches
+/// were found.
+#define header_find(is_bt, len_min) \
+ header(is_bt, len_min, return 0); \
+ uint32_t matches_count = 0
+
+
+/// Header for a loop in a skip function. "continue" tells to skip the rest
+/// of the code in the loop.
+#define header_skip(is_bt, len_min) \
+ header(is_bt, len_min, continue)
+
+
+/// Calls hc_find_func() or bt_find_func() and calculates the total number
+/// of matches found. Updates the dictionary position and returns the number
+/// of matches found.
+#define call_find(func, len_best) \
+do { \
+ matches_count = (uint32_t)(func(len_limit, pos, cur, cur_match, \
+ mf->depth, mf->son, \
+ mf->cyclic_pos, mf->cyclic_size, \
+ matches + matches_count, len_best) \
+ - matches); \
+ move_pos(mf); \
+ return matches_count; \
+} while (0)
+
+
+////////////////
+// Hash Chain //
+////////////////
+
+#if defined(HAVE_MF_HC3) || defined(HAVE_MF_HC4)
+///
+///
+/// \param len_limit Don't look for matches longer than len_limit.
+/// \param pos lzma_mf.read_pos + lzma_mf.offset
+/// \param cur Pointer to current byte (mf_ptr(mf))
+/// \param cur_match Start position of the current match candidate
+/// \param depth Maximum length of the hash chain
+/// \param son lzma_mf.son (contains the hash chain)
+/// \param cyclic_pos lzma_mf.cyclic_pos
+/// \param cyclic_size lzma_mf_cyclic_size
+/// \param matches Array to hold the matches.
+/// \param len_best The length of the longest match found so far.
+static lzma_match *
+hc_find_func(
+ const uint32_t len_limit,
+ const uint32_t pos,
+ const uint8_t *const cur,
+ uint32_t cur_match,
+ uint32_t depth,
+ uint32_t *const son,
+ const uint32_t cyclic_pos,
+ const uint32_t cyclic_size,
+ lzma_match *matches,
+ uint32_t len_best)
+{
+ son[cyclic_pos] = cur_match;
+
+ while (true) {
+ const uint32_t delta = pos - cur_match;
+ if (depth-- == 0 || delta >= cyclic_size)
+ return matches;
+
+ const uint8_t *const pb = cur - delta;
+ cur_match = son[cyclic_pos - delta
+ + (delta > cyclic_pos ? cyclic_size : 0)];
+
+ if (pb[len_best] == cur[len_best] && pb[0] == cur[0]) {
+ uint32_t len = lzma_memcmplen(pb, cur, 1, len_limit);
+
+ if (len_best < len) {
+ len_best = len;
+ matches->len = len;
+ matches->dist = delta - 1;
+ ++matches;
+
+ if (len == len_limit)
+ return matches;
+ }
+ }
+ }
+}
+
+
+#define hc_find(len_best) \
+ call_find(hc_find_func, len_best)
+
+
+#define hc_skip() \
+do { \
+ mf->son[mf->cyclic_pos] = cur_match; \
+ move_pos(mf); \
+} while (0)
+
+#endif
+
+
+#ifdef HAVE_MF_HC3
+extern uint32_t
+lzma_mf_hc3_find(lzma_mf *mf, lzma_match *matches)
+{
+ header_find(false, 3);
+
+ hash_3_calc();
+
+ const uint32_t delta2 = pos - mf->hash[hash_2_value];
+ const uint32_t cur_match = mf->hash[FIX_3_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_value] = pos;
+
+ uint32_t len_best = 2;
+
+ if (delta2 < mf->cyclic_size && *(cur - delta2) == *cur) {
+ len_best = lzma_memcmplen(cur - delta2, cur,
+ len_best, len_limit);
+
+ matches[0].len = len_best;
+ matches[0].dist = delta2 - 1;
+ matches_count = 1;
+
+ if (len_best == len_limit) {
+ hc_skip();
+ return 1; // matches_count
+ }
+ }
+
+ hc_find(len_best);
+}
+
+
+extern void
+lzma_mf_hc3_skip(lzma_mf *mf, uint32_t amount)
+{
+ do {
+ if (mf_avail(mf) < 3) {
+ move_pending(mf);
+ continue;
+ }
+
+ const uint8_t *cur = mf_ptr(mf);
+ const uint32_t pos = mf->read_pos + mf->offset;
+
+ hash_3_calc();
+
+ const uint32_t cur_match
+ = mf->hash[FIX_3_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_value] = pos;
+
+ hc_skip();
+
+ } while (--amount != 0);
+}
+#endif
+
+
+#ifdef HAVE_MF_HC4
+extern uint32_t
+lzma_mf_hc4_find(lzma_mf *mf, lzma_match *matches)
+{
+ header_find(false, 4);
+
+ hash_4_calc();
+
+ uint32_t delta2 = pos - mf->hash[hash_2_value];
+ const uint32_t delta3
+ = pos - mf->hash[FIX_3_HASH_SIZE + hash_3_value];
+ const uint32_t cur_match = mf->hash[FIX_4_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value ] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_3_value] = pos;
+ mf->hash[FIX_4_HASH_SIZE + hash_value] = pos;
+
+ uint32_t len_best = 1;
+
+ if (delta2 < mf->cyclic_size && *(cur - delta2) == *cur) {
+ len_best = 2;
+ matches[0].len = 2;
+ matches[0].dist = delta2 - 1;
+ matches_count = 1;
+ }
+
+ if (delta2 != delta3 && delta3 < mf->cyclic_size
+ && *(cur - delta3) == *cur) {
+ len_best = 3;
+ matches[matches_count++].dist = delta3 - 1;
+ delta2 = delta3;
+ }
+
+ if (matches_count != 0) {
+ len_best = lzma_memcmplen(cur - delta2, cur,
+ len_best, len_limit);
+
+ matches[matches_count - 1].len = len_best;
+
+ if (len_best == len_limit) {
+ hc_skip();
+ return matches_count;
+ }
+ }
+
+ if (len_best < 3)
+ len_best = 3;
+
+ hc_find(len_best);
+}
+
+
+extern void
+lzma_mf_hc4_skip(lzma_mf *mf, uint32_t amount)
+{
+ do {
+ if (mf_avail(mf) < 4) {
+ move_pending(mf);
+ continue;
+ }
+
+ const uint8_t *cur = mf_ptr(mf);
+ const uint32_t pos = mf->read_pos + mf->offset;
+
+ hash_4_calc();
+
+ const uint32_t cur_match
+ = mf->hash[FIX_4_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_3_value] = pos;
+ mf->hash[FIX_4_HASH_SIZE + hash_value] = pos;
+
+ hc_skip();
+
+ } while (--amount != 0);
+}
+#endif
+
+
+/////////////////
+// Binary Tree //
+/////////////////
+
+#if defined(HAVE_MF_BT2) || defined(HAVE_MF_BT3) || defined(HAVE_MF_BT4)
+static lzma_match *
+bt_find_func(
+ const uint32_t len_limit,
+ const uint32_t pos,
+ const uint8_t *const cur,
+ uint32_t cur_match,
+ uint32_t depth,
+ uint32_t *const son,
+ const uint32_t cyclic_pos,
+ const uint32_t cyclic_size,
+ lzma_match *matches,
+ uint32_t len_best)
+{
+ uint32_t *ptr0 = son + (cyclic_pos << 1) + 1;
+ uint32_t *ptr1 = son + (cyclic_pos << 1);
+
+ uint32_t len0 = 0;
+ uint32_t len1 = 0;
+
+ while (true) {
+ const uint32_t delta = pos - cur_match;
+ if (depth-- == 0 || delta >= cyclic_size) {
+ *ptr0 = EMPTY_HASH_VALUE;
+ *ptr1 = EMPTY_HASH_VALUE;
+ return matches;
+ }
+
+ uint32_t *const pair = son + ((cyclic_pos - delta
+ + (delta > cyclic_pos ? cyclic_size : 0))
+ << 1);
+
+ const uint8_t *const pb = cur - delta;
+ uint32_t len = my_min(len0, len1);
+
+ if (pb[len] == cur[len]) {
+ len = lzma_memcmplen(pb, cur, len + 1, len_limit);
+
+ if (len_best < len) {
+ len_best = len;
+ matches->len = len;
+ matches->dist = delta - 1;
+ ++matches;
+
+ if (len == len_limit) {
+ *ptr1 = pair[0];
+ *ptr0 = pair[1];
+ return matches;
+ }
+ }
+ }
+
+ if (pb[len] < cur[len]) {
+ *ptr1 = cur_match;
+ ptr1 = pair + 1;
+ cur_match = *ptr1;
+ len1 = len;
+ } else {
+ *ptr0 = cur_match;
+ ptr0 = pair;
+ cur_match = *ptr0;
+ len0 = len;
+ }
+ }
+}
+
+
+static void
+bt_skip_func(
+ const uint32_t len_limit,
+ const uint32_t pos,
+ const uint8_t *const cur,
+ uint32_t cur_match,
+ uint32_t depth,
+ uint32_t *const son,
+ const uint32_t cyclic_pos,
+ const uint32_t cyclic_size)
+{
+ uint32_t *ptr0 = son + (cyclic_pos << 1) + 1;
+ uint32_t *ptr1 = son + (cyclic_pos << 1);
+
+ uint32_t len0 = 0;
+ uint32_t len1 = 0;
+
+ while (true) {
+ const uint32_t delta = pos - cur_match;
+ if (depth-- == 0 || delta >= cyclic_size) {
+ *ptr0 = EMPTY_HASH_VALUE;
+ *ptr1 = EMPTY_HASH_VALUE;
+ return;
+ }
+
+ uint32_t *pair = son + ((cyclic_pos - delta
+ + (delta > cyclic_pos ? cyclic_size : 0))
+ << 1);
+ const uint8_t *pb = cur - delta;
+ uint32_t len = my_min(len0, len1);
+
+ if (pb[len] == cur[len]) {
+ len = lzma_memcmplen(pb, cur, len + 1, len_limit);
+
+ if (len == len_limit) {
+ *ptr1 = pair[0];
+ *ptr0 = pair[1];
+ return;
+ }
+ }
+
+ if (pb[len] < cur[len]) {
+ *ptr1 = cur_match;
+ ptr1 = pair + 1;
+ cur_match = *ptr1;
+ len1 = len;
+ } else {
+ *ptr0 = cur_match;
+ ptr0 = pair;
+ cur_match = *ptr0;
+ len0 = len;
+ }
+ }
+}
+
+
+#define bt_find(len_best) \
+ call_find(bt_find_func, len_best)
+
+#define bt_skip() \
+do { \
+ bt_skip_func(len_limit, pos, cur, cur_match, mf->depth, \
+ mf->son, mf->cyclic_pos, \
+ mf->cyclic_size); \
+ move_pos(mf); \
+} while (0)
+
+#endif
+
+
+#ifdef HAVE_MF_BT2
+extern uint32_t
+lzma_mf_bt2_find(lzma_mf *mf, lzma_match *matches)
+{
+ header_find(true, 2);
+
+ hash_2_calc();
+
+ const uint32_t cur_match = mf->hash[hash_value];
+ mf->hash[hash_value] = pos;
+
+ bt_find(1);
+}
+
+
+extern void
+lzma_mf_bt2_skip(lzma_mf *mf, uint32_t amount)
+{
+ do {
+ header_skip(true, 2);
+
+ hash_2_calc();
+
+ const uint32_t cur_match = mf->hash[hash_value];
+ mf->hash[hash_value] = pos;
+
+ bt_skip();
+
+ } while (--amount != 0);
+}
+#endif
+
+
+#ifdef HAVE_MF_BT3
+extern uint32_t
+lzma_mf_bt3_find(lzma_mf *mf, lzma_match *matches)
+{
+ header_find(true, 3);
+
+ hash_3_calc();
+
+ const uint32_t delta2 = pos - mf->hash[hash_2_value];
+ const uint32_t cur_match = mf->hash[FIX_3_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_value] = pos;
+
+ uint32_t len_best = 2;
+
+ if (delta2 < mf->cyclic_size && *(cur - delta2) == *cur) {
+ len_best = lzma_memcmplen(
+ cur, cur - delta2, len_best, len_limit);
+
+ matches[0].len = len_best;
+ matches[0].dist = delta2 - 1;
+ matches_count = 1;
+
+ if (len_best == len_limit) {
+ bt_skip();
+ return 1; // matches_count
+ }
+ }
+
+ bt_find(len_best);
+}
+
+
+extern void
+lzma_mf_bt3_skip(lzma_mf *mf, uint32_t amount)
+{
+ do {
+ header_skip(true, 3);
+
+ hash_3_calc();
+
+ const uint32_t cur_match
+ = mf->hash[FIX_3_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_value] = pos;
+
+ bt_skip();
+
+ } while (--amount != 0);
+}
+#endif
+
+
+#ifdef HAVE_MF_BT4
+extern uint32_t
+lzma_mf_bt4_find(lzma_mf *mf, lzma_match *matches)
+{
+ header_find(true, 4);
+
+ hash_4_calc();
+
+ uint32_t delta2 = pos - mf->hash[hash_2_value];
+ const uint32_t delta3
+ = pos - mf->hash[FIX_3_HASH_SIZE + hash_3_value];
+ const uint32_t cur_match = mf->hash[FIX_4_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_3_value] = pos;
+ mf->hash[FIX_4_HASH_SIZE + hash_value] = pos;
+
+ uint32_t len_best = 1;
+
+ if (delta2 < mf->cyclic_size && *(cur - delta2) == *cur) {
+ len_best = 2;
+ matches[0].len = 2;
+ matches[0].dist = delta2 - 1;
+ matches_count = 1;
+ }
+
+ if (delta2 != delta3 && delta3 < mf->cyclic_size
+ && *(cur - delta3) == *cur) {
+ len_best = 3;
+ matches[matches_count++].dist = delta3 - 1;
+ delta2 = delta3;
+ }
+
+ if (matches_count != 0) {
+ len_best = lzma_memcmplen(
+ cur, cur - delta2, len_best, len_limit);
+
+ matches[matches_count - 1].len = len_best;
+
+ if (len_best == len_limit) {
+ bt_skip();
+ return matches_count;
+ }
+ }
+
+ if (len_best < 3)
+ len_best = 3;
+
+ bt_find(len_best);
+}
+
+
+extern void
+lzma_mf_bt4_skip(lzma_mf *mf, uint32_t amount)
+{
+ do {
+ header_skip(true, 4);
+
+ hash_4_calc();
+
+ const uint32_t cur_match
+ = mf->hash[FIX_4_HASH_SIZE + hash_value];
+
+ mf->hash[hash_2_value] = pos;
+ mf->hash[FIX_3_HASH_SIZE + hash_3_value] = pos;
+ mf->hash[FIX_4_HASH_SIZE + hash_value] = pos;
+
+ bt_skip();
+
+ } while (--amount != 0);
+}
+#endif
diff --git a/src/liblzma/lzma/Makefile.inc b/src/liblzma/lzma/Makefile.inc
new file mode 100644
index 0000000..25440d8
--- /dev/null
+++ b/src/liblzma/lzma/Makefile.inc
@@ -0,0 +1,44 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+EXTRA_DIST += lzma/fastpos_tablegen.c
+
+liblzma_la_SOURCES += \
+ lzma/lzma_common.h \
+ lzma/lzma_encoder_presets.c
+
+if COND_ENCODER_LZMA1
+liblzma_la_SOURCES += \
+ lzma/fastpos.h \
+ lzma/lzma_encoder.h \
+ lzma/lzma_encoder.c \
+ lzma/lzma_encoder_private.h \
+ lzma/lzma_encoder_optimum_fast.c \
+ lzma/lzma_encoder_optimum_normal.c
+
+if !COND_SMALL
+liblzma_la_SOURCES += lzma/fastpos_table.c
+endif
+endif
+
+if COND_DECODER_LZMA1
+liblzma_la_SOURCES += \
+ lzma/lzma_decoder.c \
+ lzma/lzma_decoder.h
+endif
+
+if COND_ENCODER_LZMA2
+liblzma_la_SOURCES += \
+ lzma/lzma2_encoder.c \
+ lzma/lzma2_encoder.h
+endif
+
+if COND_DECODER_LZMA2
+liblzma_la_SOURCES += \
+ lzma/lzma2_decoder.c \
+ lzma/lzma2_decoder.h
+endif
diff --git a/src/liblzma/lzma/fastpos.h b/src/liblzma/lzma/fastpos.h
new file mode 100644
index 0000000..dbeb16f
--- /dev/null
+++ b/src/liblzma/lzma/fastpos.h
@@ -0,0 +1,142 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file fastpos.h
+/// \brief Kind of two-bit version of bit scan reverse
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_FASTPOS_H
+#define LZMA_FASTPOS_H
+
+// LZMA encodes match distances by storing the highest two bits using
+// a six-bit value [0, 63], and then the missing lower bits.
+// Dictionary size is also stored using this encoding in the .xz
+// file format header.
+//
+// fastpos.h provides a way to quickly find out the correct six-bit
+// values. The following table gives some examples of this encoding:
+//
+// dist return
+// 0 0
+// 1 1
+// 2 2
+// 3 3
+// 4 4
+// 5 4
+// 6 5
+// 7 5
+// 8 6
+// 11 6
+// 12 7
+// ... ...
+// 15 7
+// 16 8
+// 17 8
+// ... ...
+// 23 8
+// 24 9
+// 25 9
+// ... ...
+//
+//
+// Provided functions or macros
+// ----------------------------
+//
+// get_dist_slot(dist) is the basic version. get_dist_slot_2(dist)
+// assumes that dist >= FULL_DISTANCES, thus the result is at least
+// FULL_DISTANCES_BITS * 2. Using get_dist_slot(dist) instead of
+// get_dist_slot_2(dist) would give the same result, but get_dist_slot_2(dist)
+// should be tiny bit faster due to the assumption being made.
+//
+//
+// Size vs. speed
+// --------------
+//
+// With some CPUs that have fast BSR (bit scan reverse) instruction, the
+// size optimized version is slightly faster than the bigger table based
+// approach. Such CPUs include Intel Pentium Pro, Pentium II, Pentium III
+// and Core 2 (possibly others). AMD K7 seems to have slower BSR, but that
+// would still have speed roughly comparable to the table version. Older
+// x86 CPUs like the original Pentium have very slow BSR; on those systems
+// the table version is a lot faster.
+//
+// On some CPUs, the table version is a lot faster when using position
+// dependent code, but with position independent code the size optimized
+// version is slightly faster. This occurs at least on 32-bit SPARC (no
+// ASM optimizations).
+//
+// I'm making the table version the default, because that has good speed
+// on all systems I have tried. The size optimized version is sometimes
+// slightly faster, but sometimes it is a lot slower.
+
+#ifdef HAVE_SMALL
+# define get_dist_slot(dist) \
+ ((dist) <= 4 ? (dist) : get_dist_slot_2(dist))
+
+static inline uint32_t
+get_dist_slot_2(uint32_t dist)
+{
+ const uint32_t i = bsr32(dist);
+ return (i + i) + ((dist >> (i - 1)) & 1);
+}
+
+
+#else
+
+#define FASTPOS_BITS 13
+
+lzma_attr_visibility_hidden
+extern const uint8_t lzma_fastpos[1 << FASTPOS_BITS];
+
+
+#define fastpos_shift(extra, n) \
+ ((extra) + (n) * (FASTPOS_BITS - 1))
+
+#define fastpos_limit(extra, n) \
+ (UINT32_C(1) << (FASTPOS_BITS + fastpos_shift(extra, n)))
+
+#define fastpos_result(dist, extra, n) \
+ (uint32_t)(lzma_fastpos[(dist) >> fastpos_shift(extra, n)]) \
+ + 2 * fastpos_shift(extra, n)
+
+
+static inline uint32_t
+get_dist_slot(uint32_t dist)
+{
+ // If it is small enough, we can pick the result directly from
+ // the precalculated table.
+ if (dist < fastpos_limit(0, 0))
+ return lzma_fastpos[dist];
+
+ if (dist < fastpos_limit(0, 1))
+ return fastpos_result(dist, 0, 1);
+
+ return fastpos_result(dist, 0, 2);
+}
+
+
+#ifdef FULL_DISTANCES_BITS
+static inline uint32_t
+get_dist_slot_2(uint32_t dist)
+{
+ assert(dist >= FULL_DISTANCES);
+
+ if (dist < fastpos_limit(FULL_DISTANCES_BITS - 1, 0))
+ return fastpos_result(dist, FULL_DISTANCES_BITS - 1, 0);
+
+ if (dist < fastpos_limit(FULL_DISTANCES_BITS - 1, 1))
+ return fastpos_result(dist, FULL_DISTANCES_BITS - 1, 1);
+
+ return fastpos_result(dist, FULL_DISTANCES_BITS - 1, 2);
+}
+#endif
+
+#endif
+
+#endif
diff --git a/src/liblzma/lzma/fastpos_table.c b/src/liblzma/lzma/fastpos_table.c
new file mode 100644
index 0000000..6a3ceac
--- /dev/null
+++ b/src/liblzma/lzma/fastpos_table.c
@@ -0,0 +1,519 @@
+/* This file has been automatically generated by fastpos_tablegen.c. */
+
+#include "common.h"
+#include "fastpos.h"
+
+const uint8_t lzma_fastpos[1 << FASTPOS_BITS] = {
+ 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
+ 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
+ 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+ 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+ 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+ 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+ 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+ 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+ 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+ 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+ 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+ 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+ 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+ 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+ 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+ 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
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+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+ 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25
+};
diff --git a/src/liblzma/lzma/fastpos_tablegen.c b/src/liblzma/lzma/fastpos_tablegen.c
new file mode 100644
index 0000000..57ed150
--- /dev/null
+++ b/src/liblzma/lzma/fastpos_tablegen.c
@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file fastpos_tablegen.c
+/// \brief Generates the lzma_fastpos[] lookup table
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#define lzma_attr_visibility_hidden
+#include "fastpos.h"
+
+
+int
+main(void)
+{
+ uint8_t fastpos[1 << FASTPOS_BITS];
+
+ const uint8_t fast_slots = 2 * FASTPOS_BITS;
+ uint32_t c = 2;
+
+ fastpos[0] = 0;
+ fastpos[1] = 1;
+
+ for (uint8_t slot_fast = 2; slot_fast < fast_slots; ++slot_fast) {
+ const uint32_t k = 1 << ((slot_fast >> 1) - 1);
+ for (uint32_t j = 0; j < k; ++j, ++c)
+ fastpos[c] = slot_fast;
+ }
+
+ printf("/* This file has been automatically generated "
+ "by fastpos_tablegen.c. */\n\n"
+ "#include \"common.h\"\n"
+ "#include \"fastpos.h\"\n\n"
+ "const uint8_t lzma_fastpos[1 << FASTPOS_BITS] = {");
+
+ for (size_t i = 0; i < (1 << FASTPOS_BITS); ++i) {
+ if (i % 16 == 0)
+ printf("\n\t");
+
+ printf("%3u", (unsigned int)(fastpos[i]));
+
+ if (i != (1 << FASTPOS_BITS) - 1)
+ printf(",");
+ }
+
+ printf("\n};\n");
+
+ return 0;
+}
diff --git a/src/liblzma/lzma/lzma2_decoder.c b/src/liblzma/lzma/lzma2_decoder.c
new file mode 100644
index 0000000..567df49
--- /dev/null
+++ b/src/liblzma/lzma/lzma2_decoder.c
@@ -0,0 +1,311 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma2_decoder.c
+/// \brief LZMA2 decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma2_decoder.h"
+#include "lz_decoder.h"
+#include "lzma_decoder.h"
+
+
+typedef struct {
+ enum sequence {
+ SEQ_CONTROL,
+ SEQ_UNCOMPRESSED_1,
+ SEQ_UNCOMPRESSED_2,
+ SEQ_COMPRESSED_0,
+ SEQ_COMPRESSED_1,
+ SEQ_PROPERTIES,
+ SEQ_LZMA,
+ SEQ_COPY,
+ } sequence;
+
+ /// Sequence after the size fields have been decoded.
+ enum sequence next_sequence;
+
+ /// LZMA decoder
+ lzma_lz_decoder lzma;
+
+ /// Uncompressed size of LZMA chunk
+ size_t uncompressed_size;
+
+ /// Compressed size of the chunk (naturally equals to uncompressed
+ /// size of uncompressed chunk)
+ size_t compressed_size;
+
+ /// True if properties are needed. This is false before the
+ /// first LZMA chunk.
+ bool need_properties;
+
+ /// True if dictionary reset is needed. This is false before the
+ /// first chunk (LZMA or uncompressed).
+ bool need_dictionary_reset;
+
+ lzma_options_lzma options;
+} lzma_lzma2_coder;
+
+
+static lzma_ret
+lzma2_decode(void *coder_ptr, lzma_dict *restrict dict,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size)
+{
+ lzma_lzma2_coder *restrict coder = coder_ptr;
+
+ // With SEQ_LZMA it is possible that no new input is needed to do
+ // some progress. The rest of the sequences assume that there is
+ // at least one byte of input.
+ while (*in_pos < in_size || coder->sequence == SEQ_LZMA)
+ switch (coder->sequence) {
+ case SEQ_CONTROL: {
+ const uint32_t control = in[*in_pos];
+ ++*in_pos;
+
+ // End marker
+ if (control == 0x00)
+ return LZMA_STREAM_END;
+
+ if (control >= 0xE0 || control == 1) {
+ // Dictionary reset implies that next LZMA chunk has
+ // to set new properties.
+ coder->need_properties = true;
+ coder->need_dictionary_reset = true;
+ } else if (coder->need_dictionary_reset) {
+ return LZMA_DATA_ERROR;
+ }
+
+ if (control >= 0x80) {
+ // LZMA chunk. The highest five bits of the
+ // uncompressed size are taken from the control byte.
+ coder->uncompressed_size = (control & 0x1F) << 16;
+ coder->sequence = SEQ_UNCOMPRESSED_1;
+
+ // See if there are new properties or if we need to
+ // reset the state.
+ if (control >= 0xC0) {
+ // When there are new properties, state reset
+ // is done at SEQ_PROPERTIES.
+ coder->need_properties = false;
+ coder->next_sequence = SEQ_PROPERTIES;
+
+ } else if (coder->need_properties) {
+ return LZMA_DATA_ERROR;
+
+ } else {
+ coder->next_sequence = SEQ_LZMA;
+
+ // If only state reset is wanted with old
+ // properties, do the resetting here for
+ // simplicity.
+ if (control >= 0xA0)
+ coder->lzma.reset(coder->lzma.coder,
+ &coder->options);
+ }
+ } else {
+ // Invalid control values
+ if (control > 2)
+ return LZMA_DATA_ERROR;
+
+ // It's uncompressed chunk
+ coder->sequence = SEQ_COMPRESSED_0;
+ coder->next_sequence = SEQ_COPY;
+ }
+
+ if (coder->need_dictionary_reset) {
+ // Finish the dictionary reset and let the caller
+ // flush the dictionary to the actual output buffer.
+ coder->need_dictionary_reset = false;
+ dict_reset(dict);
+ return LZMA_OK;
+ }
+
+ break;
+ }
+
+ case SEQ_UNCOMPRESSED_1:
+ coder->uncompressed_size += (uint32_t)(in[(*in_pos)++]) << 8;
+ coder->sequence = SEQ_UNCOMPRESSED_2;
+ break;
+
+ case SEQ_UNCOMPRESSED_2:
+ coder->uncompressed_size += in[(*in_pos)++] + 1U;
+ coder->sequence = SEQ_COMPRESSED_0;
+ coder->lzma.set_uncompressed(coder->lzma.coder,
+ coder->uncompressed_size, false);
+ break;
+
+ case SEQ_COMPRESSED_0:
+ coder->compressed_size = (uint32_t)(in[(*in_pos)++]) << 8;
+ coder->sequence = SEQ_COMPRESSED_1;
+ break;
+
+ case SEQ_COMPRESSED_1:
+ coder->compressed_size += in[(*in_pos)++] + 1U;
+ coder->sequence = coder->next_sequence;
+ break;
+
+ case SEQ_PROPERTIES:
+ if (lzma_lzma_lclppb_decode(&coder->options, in[(*in_pos)++]))
+ return LZMA_DATA_ERROR;
+
+ coder->lzma.reset(coder->lzma.coder, &coder->options);
+
+ coder->sequence = SEQ_LZMA;
+ break;
+
+ case SEQ_LZMA: {
+ // Store the start offset so that we can update
+ // coder->compressed_size later.
+ const size_t in_start = *in_pos;
+
+ // Decode from in[] to *dict.
+ const lzma_ret ret = coder->lzma.code(coder->lzma.coder,
+ dict, in, in_pos, in_size);
+
+ // Validate and update coder->compressed_size.
+ const size_t in_used = *in_pos - in_start;
+ if (in_used > coder->compressed_size)
+ return LZMA_DATA_ERROR;
+
+ coder->compressed_size -= in_used;
+
+ // Return if we didn't finish the chunk, or an error occurred.
+ if (ret != LZMA_STREAM_END)
+ return ret;
+
+ // The LZMA decoder must have consumed the whole chunk now.
+ // We don't need to worry about uncompressed size since it
+ // is checked by the LZMA decoder.
+ if (coder->compressed_size != 0)
+ return LZMA_DATA_ERROR;
+
+ coder->sequence = SEQ_CONTROL;
+ break;
+ }
+
+ case SEQ_COPY: {
+ // Copy from input to the dictionary as is.
+ dict_write(dict, in, in_pos, in_size, &coder->compressed_size);
+ if (coder->compressed_size != 0)
+ return LZMA_OK;
+
+ coder->sequence = SEQ_CONTROL;
+ break;
+ }
+
+ default:
+ assert(0);
+ return LZMA_PROG_ERROR;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+lzma2_decoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_lzma2_coder *coder = coder_ptr;
+
+ assert(coder->lzma.end == NULL);
+ lzma_free(coder->lzma.coder, allocator);
+
+ lzma_free(coder, allocator);
+
+ return;
+}
+
+
+static lzma_ret
+lzma2_decoder_init(lzma_lz_decoder *lz, const lzma_allocator *allocator,
+ lzma_vli id lzma_attribute((__unused__)), const void *opt,
+ lzma_lz_options *lz_options)
+{
+ lzma_lzma2_coder *coder = lz->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_lzma2_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ lz->coder = coder;
+ lz->code = &lzma2_decode;
+ lz->end = &lzma2_decoder_end;
+
+ coder->lzma = LZMA_LZ_DECODER_INIT;
+ }
+
+ const lzma_options_lzma *options = opt;
+
+ coder->sequence = SEQ_CONTROL;
+ coder->need_properties = true;
+ coder->need_dictionary_reset = options->preset_dict == NULL
+ || options->preset_dict_size == 0;
+
+ return lzma_lzma_decoder_create(&coder->lzma,
+ allocator, options, lz_options);
+}
+
+
+extern lzma_ret
+lzma_lzma2_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ // LZMA2 can only be the last filter in the chain. This is enforced
+ // by the raw_decoder initialization.
+ assert(filters[1].init == NULL);
+
+ return lzma_lz_decoder_init(next, allocator, filters,
+ &lzma2_decoder_init);
+}
+
+
+extern uint64_t
+lzma_lzma2_decoder_memusage(const void *options)
+{
+ return sizeof(lzma_lzma2_coder)
+ + lzma_lzma_decoder_memusage_nocheck(options);
+}
+
+
+extern lzma_ret
+lzma_lzma2_props_decode(void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ if (props_size != 1)
+ return LZMA_OPTIONS_ERROR;
+
+ // Check that reserved bits are unset.
+ if (props[0] & 0xC0)
+ return LZMA_OPTIONS_ERROR;
+
+ // Decode the dictionary size.
+ if (props[0] > 40)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_options_lzma *opt = lzma_alloc(
+ sizeof(lzma_options_lzma), allocator);
+ if (opt == NULL)
+ return LZMA_MEM_ERROR;
+
+ if (props[0] == 40) {
+ opt->dict_size = UINT32_MAX;
+ } else {
+ opt->dict_size = 2 | (props[0] & 1U);
+ opt->dict_size <<= props[0] / 2U + 11;
+ }
+
+ opt->preset_dict = NULL;
+ opt->preset_dict_size = 0;
+
+ *options = opt;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/lzma/lzma2_decoder.h b/src/liblzma/lzma/lzma2_decoder.h
new file mode 100644
index 0000000..ef2dcbf
--- /dev/null
+++ b/src/liblzma/lzma/lzma2_decoder.h
@@ -0,0 +1,29 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma2_decoder.h
+/// \brief LZMA2 decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA2_DECODER_H
+#define LZMA_LZMA2_DECODER_H
+
+#include "common.h"
+
+extern lzma_ret lzma_lzma2_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern uint64_t lzma_lzma2_decoder_memusage(const void *options);
+
+extern lzma_ret lzma_lzma2_props_decode(
+ void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size);
+
+#endif
diff --git a/src/liblzma/lzma/lzma2_encoder.c b/src/liblzma/lzma/lzma2_encoder.c
new file mode 100644
index 0000000..4b6b231
--- /dev/null
+++ b/src/liblzma/lzma/lzma2_encoder.c
@@ -0,0 +1,414 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma2_encoder.c
+/// \brief LZMA2 encoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lz_encoder.h"
+#include "lzma_encoder.h"
+#include "fastpos.h"
+#include "lzma2_encoder.h"
+
+
+typedef struct {
+ enum {
+ SEQ_INIT,
+ SEQ_LZMA_ENCODE,
+ SEQ_LZMA_COPY,
+ SEQ_UNCOMPRESSED_HEADER,
+ SEQ_UNCOMPRESSED_COPY,
+ } sequence;
+
+ /// LZMA encoder
+ void *lzma;
+
+ /// LZMA options currently in use.
+ lzma_options_lzma opt_cur;
+
+ bool need_properties;
+ bool need_state_reset;
+ bool need_dictionary_reset;
+
+ /// Uncompressed size of a chunk
+ size_t uncompressed_size;
+
+ /// Compressed size of a chunk (excluding headers); this is also used
+ /// to indicate the end of buf[] in SEQ_LZMA_COPY.
+ size_t compressed_size;
+
+ /// Read position in buf[]
+ size_t buf_pos;
+
+ /// Buffer to hold the chunk header and LZMA compressed data
+ uint8_t buf[LZMA2_HEADER_MAX + LZMA2_CHUNK_MAX];
+} lzma_lzma2_coder;
+
+
+static void
+lzma2_header_lzma(lzma_lzma2_coder *coder)
+{
+ assert(coder->uncompressed_size > 0);
+ assert(coder->uncompressed_size <= LZMA2_UNCOMPRESSED_MAX);
+ assert(coder->compressed_size > 0);
+ assert(coder->compressed_size <= LZMA2_CHUNK_MAX);
+
+ size_t pos;
+
+ if (coder->need_properties) {
+ pos = 0;
+
+ if (coder->need_dictionary_reset)
+ coder->buf[pos] = 0x80 + (3 << 5);
+ else
+ coder->buf[pos] = 0x80 + (2 << 5);
+ } else {
+ pos = 1;
+
+ if (coder->need_state_reset)
+ coder->buf[pos] = 0x80 + (1 << 5);
+ else
+ coder->buf[pos] = 0x80;
+ }
+
+ // Set the start position for copying.
+ coder->buf_pos = pos;
+
+ // Uncompressed size
+ size_t size = coder->uncompressed_size - 1;
+ coder->buf[pos++] += size >> 16;
+ coder->buf[pos++] = (size >> 8) & 0xFF;
+ coder->buf[pos++] = size & 0xFF;
+
+ // Compressed size
+ size = coder->compressed_size - 1;
+ coder->buf[pos++] = size >> 8;
+ coder->buf[pos++] = size & 0xFF;
+
+ // Properties, if needed
+ if (coder->need_properties)
+ lzma_lzma_lclppb_encode(&coder->opt_cur, coder->buf + pos);
+
+ coder->need_properties = false;
+ coder->need_state_reset = false;
+ coder->need_dictionary_reset = false;
+
+ // The copying code uses coder->compressed_size to indicate the end
+ // of coder->buf[], so we need add the maximum size of the header here.
+ coder->compressed_size += LZMA2_HEADER_MAX;
+
+ return;
+}
+
+
+static void
+lzma2_header_uncompressed(lzma_lzma2_coder *coder)
+{
+ assert(coder->uncompressed_size > 0);
+ assert(coder->uncompressed_size <= LZMA2_CHUNK_MAX);
+
+ // If this is the first chunk, we need to include dictionary
+ // reset indicator.
+ if (coder->need_dictionary_reset)
+ coder->buf[0] = 1;
+ else
+ coder->buf[0] = 2;
+
+ coder->need_dictionary_reset = false;
+
+ // "Compressed" size
+ coder->buf[1] = (coder->uncompressed_size - 1) >> 8;
+ coder->buf[2] = (coder->uncompressed_size - 1) & 0xFF;
+
+ // Set the start position for copying.
+ coder->buf_pos = 0;
+ return;
+}
+
+
+static lzma_ret
+lzma2_encode(void *coder_ptr, lzma_mf *restrict mf,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size)
+{
+ lzma_lzma2_coder *restrict coder = coder_ptr;
+
+ while (*out_pos < out_size)
+ switch (coder->sequence) {
+ case SEQ_INIT:
+ // If there's no input left and we are flushing or finishing,
+ // don't start a new chunk.
+ if (mf_unencoded(mf) == 0) {
+ // Write end of payload marker if finishing.
+ if (mf->action == LZMA_FINISH)
+ out[(*out_pos)++] = 0;
+
+ return mf->action == LZMA_RUN
+ ? LZMA_OK : LZMA_STREAM_END;
+ }
+
+ if (coder->need_state_reset)
+ return_if_error(lzma_lzma_encoder_reset(
+ coder->lzma, &coder->opt_cur));
+
+ coder->uncompressed_size = 0;
+ coder->compressed_size = 0;
+ coder->sequence = SEQ_LZMA_ENCODE;
+
+ // Fall through
+
+ case SEQ_LZMA_ENCODE: {
+ // Calculate how much more uncompressed data this chunk
+ // could accept.
+ const uint32_t left = LZMA2_UNCOMPRESSED_MAX
+ - coder->uncompressed_size;
+ uint32_t limit;
+
+ if (left < mf->match_len_max) {
+ // Must flush immediately since the next LZMA symbol
+ // could make the uncompressed size of the chunk too
+ // big.
+ limit = 0;
+ } else {
+ // Calculate maximum read_limit that is OK from point
+ // of view of LZMA2 chunk size.
+ limit = mf->read_pos - mf->read_ahead
+ + left - mf->match_len_max;
+ }
+
+ // Save the start position so that we can update
+ // coder->uncompressed_size.
+ const uint32_t read_start = mf->read_pos - mf->read_ahead;
+
+ // Call the LZMA encoder until the chunk is finished.
+ const lzma_ret ret = lzma_lzma_encode(coder->lzma, mf,
+ coder->buf + LZMA2_HEADER_MAX,
+ &coder->compressed_size,
+ LZMA2_CHUNK_MAX, limit);
+
+ coder->uncompressed_size += mf->read_pos - mf->read_ahead
+ - read_start;
+
+ assert(coder->compressed_size <= LZMA2_CHUNK_MAX);
+ assert(coder->uncompressed_size <= LZMA2_UNCOMPRESSED_MAX);
+
+ if (ret != LZMA_STREAM_END)
+ return LZMA_OK;
+
+ // See if the chunk compressed. If it didn't, we encode it
+ // as uncompressed chunk. This saves a few bytes of space
+ // and makes decoding faster.
+ if (coder->compressed_size >= coder->uncompressed_size) {
+ coder->uncompressed_size += mf->read_ahead;
+ assert(coder->uncompressed_size
+ <= LZMA2_UNCOMPRESSED_MAX);
+ mf->read_ahead = 0;
+ lzma2_header_uncompressed(coder);
+ coder->need_state_reset = true;
+ coder->sequence = SEQ_UNCOMPRESSED_HEADER;
+ break;
+ }
+
+ // The chunk did compress at least by one byte, so we store
+ // the chunk as LZMA.
+ lzma2_header_lzma(coder);
+
+ coder->sequence = SEQ_LZMA_COPY;
+ }
+
+ // Fall through
+
+ case SEQ_LZMA_COPY:
+ // Copy the compressed chunk along its headers to the
+ // output buffer.
+ lzma_bufcpy(coder->buf, &coder->buf_pos,
+ coder->compressed_size,
+ out, out_pos, out_size);
+ if (coder->buf_pos != coder->compressed_size)
+ return LZMA_OK;
+
+ coder->sequence = SEQ_INIT;
+ break;
+
+ case SEQ_UNCOMPRESSED_HEADER:
+ // Copy the three-byte header to indicate uncompressed chunk.
+ lzma_bufcpy(coder->buf, &coder->buf_pos,
+ LZMA2_HEADER_UNCOMPRESSED,
+ out, out_pos, out_size);
+ if (coder->buf_pos != LZMA2_HEADER_UNCOMPRESSED)
+ return LZMA_OK;
+
+ coder->sequence = SEQ_UNCOMPRESSED_COPY;
+
+ // Fall through
+
+ case SEQ_UNCOMPRESSED_COPY:
+ // Copy the uncompressed data as is from the dictionary
+ // to the output buffer.
+ mf_read(mf, out, out_pos, out_size, &coder->uncompressed_size);
+ if (coder->uncompressed_size != 0)
+ return LZMA_OK;
+
+ coder->sequence = SEQ_INIT;
+ break;
+ }
+
+ return LZMA_OK;
+}
+
+
+static void
+lzma2_encoder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_lzma2_coder *coder = coder_ptr;
+ lzma_free(coder->lzma, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+lzma2_encoder_options_update(void *coder_ptr, const lzma_filter *filter)
+{
+ lzma_lzma2_coder *coder = coder_ptr;
+
+ // New options can be set only when there is no incomplete chunk.
+ // This is the case at the beginning of the raw stream and right
+ // after LZMA_SYNC_FLUSH.
+ if (filter->options == NULL || coder->sequence != SEQ_INIT)
+ return LZMA_PROG_ERROR;
+
+ // Look if there are new options. At least for now,
+ // only lc/lp/pb can be changed.
+ const lzma_options_lzma *opt = filter->options;
+ if (coder->opt_cur.lc != opt->lc || coder->opt_cur.lp != opt->lp
+ || coder->opt_cur.pb != opt->pb) {
+ // Validate the options.
+ if (opt->lc > LZMA_LCLP_MAX || opt->lp > LZMA_LCLP_MAX
+ || opt->lc + opt->lp > LZMA_LCLP_MAX
+ || opt->pb > LZMA_PB_MAX)
+ return LZMA_OPTIONS_ERROR;
+
+ // The new options will be used when the encoder starts
+ // a new LZMA2 chunk.
+ coder->opt_cur.lc = opt->lc;
+ coder->opt_cur.lp = opt->lp;
+ coder->opt_cur.pb = opt->pb;
+ coder->need_properties = true;
+ coder->need_state_reset = true;
+ }
+
+ return LZMA_OK;
+}
+
+
+static lzma_ret
+lzma2_encoder_init(lzma_lz_encoder *lz, const lzma_allocator *allocator,
+ lzma_vli id lzma_attribute((__unused__)), const void *options,
+ lzma_lz_options *lz_options)
+{
+ if (options == NULL)
+ return LZMA_PROG_ERROR;
+
+ lzma_lzma2_coder *coder = lz->coder;
+ if (coder == NULL) {
+ coder = lzma_alloc(sizeof(lzma_lzma2_coder), allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ lz->coder = coder;
+ lz->code = &lzma2_encode;
+ lz->end = &lzma2_encoder_end;
+ lz->options_update = &lzma2_encoder_options_update;
+
+ coder->lzma = NULL;
+ }
+
+ coder->opt_cur = *(const lzma_options_lzma *)(options);
+
+ coder->sequence = SEQ_INIT;
+ coder->need_properties = true;
+ coder->need_state_reset = false;
+ coder->need_dictionary_reset
+ = coder->opt_cur.preset_dict == NULL
+ || coder->opt_cur.preset_dict_size == 0;
+
+ // Initialize LZMA encoder
+ return_if_error(lzma_lzma_encoder_create(&coder->lzma, allocator,
+ LZMA_FILTER_LZMA2, &coder->opt_cur, lz_options));
+
+ // Make sure that we will always have enough history available in
+ // case we need to use uncompressed chunks. They are used when the
+ // compressed size of a chunk is not smaller than the uncompressed
+ // size, so we need to have at least LZMA2_COMPRESSED_MAX bytes
+ // history available.
+ if (lz_options->before_size + lz_options->dict_size < LZMA2_CHUNK_MAX)
+ lz_options->before_size
+ = LZMA2_CHUNK_MAX - lz_options->dict_size;
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_lzma2_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return lzma_lz_encoder_init(
+ next, allocator, filters, &lzma2_encoder_init);
+}
+
+
+extern uint64_t
+lzma_lzma2_encoder_memusage(const void *options)
+{
+ const uint64_t lzma_mem = lzma_lzma_encoder_memusage(options);
+ if (lzma_mem == UINT64_MAX)
+ return UINT64_MAX;
+
+ return sizeof(lzma_lzma2_coder) + lzma_mem;
+}
+
+
+extern lzma_ret
+lzma_lzma2_props_encode(const void *options, uint8_t *out)
+{
+ if (options == NULL)
+ return LZMA_PROG_ERROR;
+
+ const lzma_options_lzma *const opt = options;
+ uint32_t d = my_max(opt->dict_size, LZMA_DICT_SIZE_MIN);
+
+ // Round up to the next 2^n - 1 or 2^n + 2^(n - 1) - 1 depending
+ // on which one is the next:
+ --d;
+ d |= d >> 2;
+ d |= d >> 3;
+ d |= d >> 4;
+ d |= d >> 8;
+ d |= d >> 16;
+
+ // Get the highest two bits using the proper encoding:
+ if (d == UINT32_MAX)
+ out[0] = 40;
+ else
+ out[0] = get_dist_slot(d + 1) - 24;
+
+ return LZMA_OK;
+}
+
+
+extern uint64_t
+lzma_lzma2_block_size(const void *options)
+{
+ const lzma_options_lzma *const opt = options;
+
+ // Use at least 1 MiB to keep compression ratio better.
+ return my_max((uint64_t)(opt->dict_size) * 3, UINT64_C(1) << 20);
+}
diff --git a/src/liblzma/lzma/lzma2_encoder.h b/src/liblzma/lzma/lzma2_encoder.h
new file mode 100644
index 0000000..515f183
--- /dev/null
+++ b/src/liblzma/lzma/lzma2_encoder.h
@@ -0,0 +1,43 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma2_encoder.h
+/// \brief LZMA2 encoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA2_ENCODER_H
+#define LZMA_LZMA2_ENCODER_H
+
+#include "common.h"
+
+
+/// Maximum number of bytes of actual data per chunk (no headers)
+#define LZMA2_CHUNK_MAX (UINT32_C(1) << 16)
+
+/// Maximum uncompressed size of LZMA chunk (no headers)
+#define LZMA2_UNCOMPRESSED_MAX (UINT32_C(1) << 21)
+
+/// Maximum size of LZMA2 headers
+#define LZMA2_HEADER_MAX 6
+
+/// Size of a header for uncompressed chunk
+#define LZMA2_HEADER_UNCOMPRESSED 3
+
+
+extern lzma_ret lzma_lzma2_encoder_init(
+ lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern uint64_t lzma_lzma2_encoder_memusage(const void *options);
+
+extern lzma_ret lzma_lzma2_props_encode(const void *options, uint8_t *out);
+
+extern uint64_t lzma_lzma2_block_size(const void *options);
+
+#endif
diff --git a/src/liblzma/lzma/lzma_common.h b/src/liblzma/lzma/lzma_common.h
new file mode 100644
index 0000000..9d040d9
--- /dev/null
+++ b/src/liblzma/lzma/lzma_common.h
@@ -0,0 +1,225 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_common.h
+/// \brief Private definitions common to LZMA encoder and decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA_COMMON_H
+#define LZMA_LZMA_COMMON_H
+
+#include "common.h"
+#include "range_common.h"
+
+
+///////////////////
+// Miscellaneous //
+///////////////////
+
+/// Maximum number of position states. A position state is the lowest pos bits
+/// number of bits of the current uncompressed offset. In some places there
+/// are different sets of probabilities for different pos states.
+#define POS_STATES_MAX (1 << LZMA_PB_MAX)
+
+
+/// Validates lc, lp, and pb.
+static inline bool
+is_lclppb_valid(const lzma_options_lzma *options)
+{
+ return options->lc <= LZMA_LCLP_MAX && options->lp <= LZMA_LCLP_MAX
+ && options->lc + options->lp <= LZMA_LCLP_MAX
+ && options->pb <= LZMA_PB_MAX;
+}
+
+
+///////////
+// State //
+///////////
+
+/// This enum is used to track which events have occurred most recently and
+/// in which order. This information is used to predict the next event.
+///
+/// Events:
+/// - Literal: One 8-bit byte
+/// - Match: Repeat a chunk of data at some distance
+/// - Long repeat: Multi-byte match at a recently seen distance
+/// - Short repeat: One-byte repeat at a recently seen distance
+///
+/// The event names are in from STATE_oldest_older_previous. REP means
+/// either short or long repeated match, and NONLIT means any non-literal.
+typedef enum {
+ STATE_LIT_LIT,
+ STATE_MATCH_LIT_LIT,
+ STATE_REP_LIT_LIT,
+ STATE_SHORTREP_LIT_LIT,
+ STATE_MATCH_LIT,
+ STATE_REP_LIT,
+ STATE_SHORTREP_LIT,
+ STATE_LIT_MATCH,
+ STATE_LIT_LONGREP,
+ STATE_LIT_SHORTREP,
+ STATE_NONLIT_MATCH,
+ STATE_NONLIT_REP,
+} lzma_lzma_state;
+
+
+/// Total number of states
+#define STATES 12
+
+/// The lowest 7 states indicate that the previous state was a literal.
+#define LIT_STATES 7
+
+
+/// Indicate that the latest state was a literal.
+#define update_literal(state) \
+ state = ((state) <= STATE_SHORTREP_LIT_LIT \
+ ? STATE_LIT_LIT \
+ : ((state) <= STATE_LIT_SHORTREP \
+ ? (state) - 3 \
+ : (state) - 6))
+
+/// Indicate that the latest state was a match.
+#define update_match(state) \
+ state = ((state) < LIT_STATES ? STATE_LIT_MATCH : STATE_NONLIT_MATCH)
+
+/// Indicate that the latest state was a long repeated match.
+#define update_long_rep(state) \
+ state = ((state) < LIT_STATES ? STATE_LIT_LONGREP : STATE_NONLIT_REP)
+
+/// Indicate that the latest state was a short match.
+#define update_short_rep(state) \
+ state = ((state) < LIT_STATES ? STATE_LIT_SHORTREP : STATE_NONLIT_REP)
+
+/// Test if the previous state was a literal.
+#define is_literal_state(state) \
+ ((state) < LIT_STATES)
+
+
+/////////////
+// Literal //
+/////////////
+
+/// Each literal coder is divided in three sections:
+/// - 0x001-0x0FF: Without match byte
+/// - 0x101-0x1FF: With match byte; match bit is 0
+/// - 0x201-0x2FF: With match byte; match bit is 1
+///
+/// Match byte is used when the previous LZMA symbol was something else than
+/// a literal (that is, it was some kind of match).
+#define LITERAL_CODER_SIZE 0x300
+
+/// Maximum number of literal coders
+#define LITERAL_CODERS_MAX (1 << LZMA_LCLP_MAX)
+
+/// Locate the literal coder for the next literal byte. The choice depends on
+/// - the lowest literal_pos_bits bits of the position of the current
+/// byte; and
+/// - the highest literal_context_bits bits of the previous byte.
+#define literal_subcoder(probs, lc, lp_mask, pos, prev_byte) \
+ ((probs)[(((pos) & (lp_mask)) << (lc)) \
+ + ((uint32_t)(prev_byte) >> (8U - (lc)))])
+
+
+static inline void
+literal_init(probability (*probs)[LITERAL_CODER_SIZE],
+ uint32_t lc, uint32_t lp)
+{
+ assert(lc + lp <= LZMA_LCLP_MAX);
+
+ const uint32_t coders = 1U << (lc + lp);
+
+ for (uint32_t i = 0; i < coders; ++i)
+ for (uint32_t j = 0; j < LITERAL_CODER_SIZE; ++j)
+ bit_reset(probs[i][j]);
+
+ return;
+}
+
+
+//////////////////
+// Match length //
+//////////////////
+
+// Minimum length of a match is two bytes.
+#define MATCH_LEN_MIN 2
+
+// Match length is encoded with 4, 5, or 10 bits.
+//
+// Length Bits
+// 2-9 4 = Choice=0 + 3 bits
+// 10-17 5 = Choice=1 + Choice2=0 + 3 bits
+// 18-273 10 = Choice=1 + Choice2=1 + 8 bits
+#define LEN_LOW_BITS 3
+#define LEN_LOW_SYMBOLS (1 << LEN_LOW_BITS)
+#define LEN_MID_BITS 3
+#define LEN_MID_SYMBOLS (1 << LEN_MID_BITS)
+#define LEN_HIGH_BITS 8
+#define LEN_HIGH_SYMBOLS (1 << LEN_HIGH_BITS)
+#define LEN_SYMBOLS (LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS + LEN_HIGH_SYMBOLS)
+
+// Maximum length of a match is 273 which is a result of the encoding
+// described above.
+#define MATCH_LEN_MAX (MATCH_LEN_MIN + LEN_SYMBOLS - 1)
+
+
+////////////////////
+// Match distance //
+////////////////////
+
+// Different sets of probabilities are used for match distances that have very
+// short match length: Lengths of 2, 3, and 4 bytes have a separate set of
+// probabilities for each length. The matches with longer length use a shared
+// set of probabilities.
+#define DIST_STATES 4
+
+// Macro to get the index of the appropriate probability array.
+#define get_dist_state(len) \
+ ((len) < DIST_STATES + MATCH_LEN_MIN \
+ ? (len) - MATCH_LEN_MIN \
+ : DIST_STATES - 1)
+
+// The highest two bits of a match distance (distance slot) are encoded
+// using six bits. See fastpos.h for more explanation.
+#define DIST_SLOT_BITS 6
+#define DIST_SLOTS (1 << DIST_SLOT_BITS)
+
+// Match distances up to 127 are fully encoded using probabilities. Since
+// the highest two bits (distance slot) are always encoded using six bits,
+// the distances 0-3 don't need any additional bits to encode, since the
+// distance slot itself is the same as the actual distance. DIST_MODEL_START
+// indicates the first distance slot where at least one additional bit is
+// needed.
+#define DIST_MODEL_START 4
+
+// Match distances greater than 127 are encoded in three pieces:
+// - distance slot: the highest two bits
+// - direct bits: 2-26 bits below the highest two bits
+// - alignment bits: four lowest bits
+//
+// Direct bits don't use any probabilities.
+//
+// The distance slot value of 14 is for distances 128-191 (see the table in
+// fastpos.h to understand why).
+#define DIST_MODEL_END 14
+
+// Distance slots that indicate a distance <= 127.
+#define FULL_DISTANCES_BITS (DIST_MODEL_END / 2)
+#define FULL_DISTANCES (1 << FULL_DISTANCES_BITS)
+
+// For match distances greater than 127, only the highest two bits and the
+// lowest four bits (alignment) is encoded using probabilities.
+#define ALIGN_BITS 4
+#define ALIGN_SIZE (1 << ALIGN_BITS)
+#define ALIGN_MASK (ALIGN_SIZE - 1)
+
+// LZMA remembers the four most recent match distances. Reusing these distances
+// tends to take less space than re-encoding the actual distance value.
+#define REPS 4
+
+#endif
diff --git a/src/liblzma/lzma/lzma_decoder.c b/src/liblzma/lzma/lzma_decoder.c
new file mode 100644
index 0000000..26c148a
--- /dev/null
+++ b/src/liblzma/lzma/lzma_decoder.c
@@ -0,0 +1,1133 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_decoder.c
+/// \brief LZMA decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lz_decoder.h"
+#include "lzma_common.h"
+#include "lzma_decoder.h"
+#include "range_decoder.h"
+
+// The macros unroll loops with switch statements.
+// Silence warnings about missing fall-through comments.
+#if TUKLIB_GNUC_REQ(7, 0)
+# pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
+
+
+#ifdef HAVE_SMALL
+
+// Macros for (somewhat) size-optimized code.
+#define seq_4(seq) seq
+
+#define seq_6(seq) seq
+
+#define seq_8(seq) seq
+
+#define seq_len(seq) \
+ seq ## _CHOICE, \
+ seq ## _CHOICE2, \
+ seq ## _BITTREE
+
+#define len_decode(target, ld, pos_state, seq) \
+do { \
+case seq ## _CHOICE: \
+ rc_if_0(ld.choice, seq ## _CHOICE) { \
+ rc_update_0(ld.choice); \
+ probs = ld.low[pos_state];\
+ limit = LEN_LOW_SYMBOLS; \
+ target = MATCH_LEN_MIN; \
+ } else { \
+ rc_update_1(ld.choice); \
+case seq ## _CHOICE2: \
+ rc_if_0(ld.choice2, seq ## _CHOICE2) { \
+ rc_update_0(ld.choice2); \
+ probs = ld.mid[pos_state]; \
+ limit = LEN_MID_SYMBOLS; \
+ target = MATCH_LEN_MIN + LEN_LOW_SYMBOLS; \
+ } else { \
+ rc_update_1(ld.choice2); \
+ probs = ld.high; \
+ limit = LEN_HIGH_SYMBOLS; \
+ target = MATCH_LEN_MIN + LEN_LOW_SYMBOLS \
+ + LEN_MID_SYMBOLS; \
+ } \
+ } \
+ symbol = 1; \
+case seq ## _BITTREE: \
+ do { \
+ rc_bit(probs[symbol], , , seq ## _BITTREE); \
+ } while (symbol < limit); \
+ target += symbol - limit; \
+} while (0)
+
+#else // HAVE_SMALL
+
+// Unrolled versions
+#define seq_4(seq) \
+ seq ## 0, \
+ seq ## 1, \
+ seq ## 2, \
+ seq ## 3
+
+#define seq_6(seq) \
+ seq ## 0, \
+ seq ## 1, \
+ seq ## 2, \
+ seq ## 3, \
+ seq ## 4, \
+ seq ## 5
+
+#define seq_8(seq) \
+ seq ## 0, \
+ seq ## 1, \
+ seq ## 2, \
+ seq ## 3, \
+ seq ## 4, \
+ seq ## 5, \
+ seq ## 6, \
+ seq ## 7
+
+#define seq_len(seq) \
+ seq ## _CHOICE, \
+ seq ## _LOW0, \
+ seq ## _LOW1, \
+ seq ## _LOW2, \
+ seq ## _CHOICE2, \
+ seq ## _MID0, \
+ seq ## _MID1, \
+ seq ## _MID2, \
+ seq ## _HIGH0, \
+ seq ## _HIGH1, \
+ seq ## _HIGH2, \
+ seq ## _HIGH3, \
+ seq ## _HIGH4, \
+ seq ## _HIGH5, \
+ seq ## _HIGH6, \
+ seq ## _HIGH7
+
+#define len_decode(target, ld, pos_state, seq) \
+do { \
+ symbol = 1; \
+case seq ## _CHOICE: \
+ rc_if_0(ld.choice, seq ## _CHOICE) { \
+ rc_update_0(ld.choice); \
+ rc_bit_case(ld.low[pos_state][symbol], , , seq ## _LOW0); \
+ rc_bit_case(ld.low[pos_state][symbol], , , seq ## _LOW1); \
+ rc_bit_case(ld.low[pos_state][symbol], , , seq ## _LOW2); \
+ target = symbol - LEN_LOW_SYMBOLS + MATCH_LEN_MIN; \
+ } else { \
+ rc_update_1(ld.choice); \
+case seq ## _CHOICE2: \
+ rc_if_0(ld.choice2, seq ## _CHOICE2) { \
+ rc_update_0(ld.choice2); \
+ rc_bit_case(ld.mid[pos_state][symbol], , , \
+ seq ## _MID0); \
+ rc_bit_case(ld.mid[pos_state][symbol], , , \
+ seq ## _MID1); \
+ rc_bit_case(ld.mid[pos_state][symbol], , , \
+ seq ## _MID2); \
+ target = symbol - LEN_MID_SYMBOLS \
+ + MATCH_LEN_MIN + LEN_LOW_SYMBOLS; \
+ } else { \
+ rc_update_1(ld.choice2); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH0); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH1); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH2); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH3); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH4); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH5); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH6); \
+ rc_bit_case(ld.high[symbol], , , seq ## _HIGH7); \
+ target = symbol - LEN_HIGH_SYMBOLS \
+ + MATCH_LEN_MIN \
+ + LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS; \
+ } \
+ } \
+} while (0)
+
+#endif // HAVE_SMALL
+
+
+/// Length decoder probabilities; see comments in lzma_common.h.
+typedef struct {
+ probability choice;
+ probability choice2;
+ probability low[POS_STATES_MAX][LEN_LOW_SYMBOLS];
+ probability mid[POS_STATES_MAX][LEN_MID_SYMBOLS];
+ probability high[LEN_HIGH_SYMBOLS];
+} lzma_length_decoder;
+
+
+typedef struct {
+ ///////////////////
+ // Probabilities //
+ ///////////////////
+
+ /// Literals; see comments in lzma_common.h.
+ probability literal[LITERAL_CODERS_MAX][LITERAL_CODER_SIZE];
+
+ /// If 1, it's a match. Otherwise it's a single 8-bit literal.
+ probability is_match[STATES][POS_STATES_MAX];
+
+ /// If 1, it's a repeated match. The distance is one of rep0 .. rep3.
+ probability is_rep[STATES];
+
+ /// If 0, distance of a repeated match is rep0.
+ /// Otherwise check is_rep1.
+ probability is_rep0[STATES];
+
+ /// If 0, distance of a repeated match is rep1.
+ /// Otherwise check is_rep2.
+ probability is_rep1[STATES];
+
+ /// If 0, distance of a repeated match is rep2. Otherwise it is rep3.
+ probability is_rep2[STATES];
+
+ /// If 1, the repeated match has length of one byte. Otherwise
+ /// the length is decoded from rep_len_decoder.
+ probability is_rep0_long[STATES][POS_STATES_MAX];
+
+ /// Probability tree for the highest two bits of the match distance.
+ /// There is a separate probability tree for match lengths of
+ /// 2 (i.e. MATCH_LEN_MIN), 3, 4, and [5, 273].
+ probability dist_slot[DIST_STATES][DIST_SLOTS];
+
+ /// Probability trees for additional bits for match distance when the
+ /// distance is in the range [4, 127].
+ probability pos_special[FULL_DISTANCES - DIST_MODEL_END];
+
+ /// Probability tree for the lowest four bits of a match distance
+ /// that is equal to or greater than 128.
+ probability pos_align[ALIGN_SIZE];
+
+ /// Length of a normal match
+ lzma_length_decoder match_len_decoder;
+
+ /// Length of a repeated match
+ lzma_length_decoder rep_len_decoder;
+
+ ///////////////////
+ // Decoder state //
+ ///////////////////
+
+ // Range coder
+ lzma_range_decoder rc;
+
+ // Types of the most recently seen LZMA symbols
+ lzma_lzma_state state;
+
+ uint32_t rep0; ///< Distance of the latest match
+ uint32_t rep1; ///< Distance of second latest match
+ uint32_t rep2; ///< Distance of third latest match
+ uint32_t rep3; ///< Distance of fourth latest match
+
+ uint32_t pos_mask; // (1U << pb) - 1
+ uint32_t literal_context_bits;
+ uint32_t literal_pos_mask;
+
+ /// Uncompressed size as bytes, or LZMA_VLI_UNKNOWN if end of
+ /// payload marker is expected.
+ lzma_vli uncompressed_size;
+
+ /// True if end of payload marker (EOPM) is allowed even when
+ /// uncompressed_size is known; false if EOPM must not be present.
+ /// This is ignored if uncompressed_size == LZMA_VLI_UNKNOWN.
+ bool allow_eopm;
+
+ ////////////////////////////////
+ // State of incomplete symbol //
+ ////////////////////////////////
+
+ /// Position where to continue the decoder loop
+ enum {
+ SEQ_NORMALIZE,
+ SEQ_IS_MATCH,
+ seq_8(SEQ_LITERAL),
+ seq_8(SEQ_LITERAL_MATCHED),
+ SEQ_LITERAL_WRITE,
+ SEQ_IS_REP,
+ seq_len(SEQ_MATCH_LEN),
+ seq_6(SEQ_DIST_SLOT),
+ SEQ_DIST_MODEL,
+ SEQ_DIRECT,
+ seq_4(SEQ_ALIGN),
+ SEQ_EOPM,
+ SEQ_IS_REP0,
+ SEQ_SHORTREP,
+ SEQ_IS_REP0_LONG,
+ SEQ_IS_REP1,
+ SEQ_IS_REP2,
+ seq_len(SEQ_REP_LEN),
+ SEQ_COPY,
+ } sequence;
+
+ /// Base of the current probability tree
+ probability *probs;
+
+ /// Symbol being decoded. This is also used as an index variable in
+ /// bittree decoders: probs[symbol]
+ uint32_t symbol;
+
+ /// Used as a loop termination condition on bittree decoders and
+ /// direct bits decoder.
+ uint32_t limit;
+
+ /// Matched literal decoder: 0x100 or 0 to help avoiding branches.
+ /// Bittree reverse decoders: Offset of the next bit: 1 << offset
+ uint32_t offset;
+
+ /// If decoding a literal: match byte.
+ /// If decoding a match: length of the match.
+ uint32_t len;
+} lzma_lzma1_decoder;
+
+
+static lzma_ret
+lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
+ const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size)
+{
+ lzma_lzma1_decoder *restrict coder = coder_ptr;
+
+ ////////////////////
+ // Initialization //
+ ////////////////////
+
+ {
+ const lzma_ret ret = rc_read_init(
+ &coder->rc, in, in_pos, in_size);
+ if (ret != LZMA_STREAM_END)
+ return ret;
+ }
+
+ ///////////////
+ // Variables //
+ ///////////////
+
+ // Making local copies of often-used variables improves both
+ // speed and readability.
+
+ lzma_dict dict = *dictptr;
+
+ const size_t dict_start = dict.pos;
+
+ // Range decoder
+ rc_to_local(coder->rc, *in_pos);
+
+ // State
+ uint32_t state = coder->state;
+ uint32_t rep0 = coder->rep0;
+ uint32_t rep1 = coder->rep1;
+ uint32_t rep2 = coder->rep2;
+ uint32_t rep3 = coder->rep3;
+
+ const uint32_t pos_mask = coder->pos_mask;
+
+ // These variables are actually needed only if we last time ran
+ // out of input in the middle of the decoder loop.
+ probability *probs = coder->probs;
+ uint32_t symbol = coder->symbol;
+ uint32_t limit = coder->limit;
+ uint32_t offset = coder->offset;
+ uint32_t len = coder->len;
+
+ const uint32_t literal_pos_mask = coder->literal_pos_mask;
+ const uint32_t literal_context_bits = coder->literal_context_bits;
+
+ // Temporary variables
+ uint32_t pos_state = dict.pos & pos_mask;
+
+ lzma_ret ret = LZMA_OK;
+
+ // This is true when the next LZMA symbol is allowed to be EOPM.
+ // That is, if this is false, then EOPM is considered
+ // an invalid symbol and we will return LZMA_DATA_ERROR.
+ //
+ // EOPM is always required (not just allowed) when
+ // the uncompressed size isn't known. When uncompressed size
+ // is known, eopm_is_valid may be set to true later.
+ bool eopm_is_valid = coder->uncompressed_size == LZMA_VLI_UNKNOWN;
+
+ // If uncompressed size is known and there is enough output space
+ // to decode all the data, limit the available buffer space so that
+ // the main loop won't try to decode past the end of the stream.
+ bool might_finish_without_eopm = false;
+ if (coder->uncompressed_size != LZMA_VLI_UNKNOWN
+ && coder->uncompressed_size <= dict.limit - dict.pos) {
+ dict.limit = dict.pos + (size_t)(coder->uncompressed_size);
+ might_finish_without_eopm = true;
+ }
+
+ // The main decoder loop. The "switch" is used to restart the decoder at
+ // correct location. Once restarted, the "switch" is no longer used.
+ switch (coder->sequence)
+ while (true) {
+ // Calculate new pos_state. This is skipped on the first loop
+ // since we already calculated it when setting up the local
+ // variables.
+ pos_state = dict.pos & pos_mask;
+
+ case SEQ_NORMALIZE:
+ case SEQ_IS_MATCH:
+ if (unlikely(might_finish_without_eopm
+ && dict.pos == dict.limit)) {
+ // In rare cases there is a useless byte that needs
+ // to be read anyway.
+ rc_normalize(SEQ_NORMALIZE);
+
+ // If the range decoder state is such that we can
+ // be at the end of the LZMA stream, then the
+ // decoding is finished.
+ if (rc_is_finished(rc)) {
+ ret = LZMA_STREAM_END;
+ goto out;
+ }
+
+ // If the caller hasn't allowed EOPM to be present
+ // together with known uncompressed size, then the
+ // LZMA stream is corrupt.
+ if (!coder->allow_eopm) {
+ ret = LZMA_DATA_ERROR;
+ goto out;
+ }
+
+ // Otherwise continue decoding with the expectation
+ // that the next LZMA symbol is EOPM.
+ eopm_is_valid = true;
+ }
+
+ rc_if_0(coder->is_match[state][pos_state], SEQ_IS_MATCH) {
+ rc_update_0(coder->is_match[state][pos_state]);
+
+ // It's a literal i.e. a single 8-bit byte.
+
+ probs = literal_subcoder(coder->literal,
+ literal_context_bits, literal_pos_mask,
+ dict.pos, dict_get(&dict, 0));
+ symbol = 1;
+
+ if (is_literal_state(state)) {
+ // Decode literal without match byte.
+#ifdef HAVE_SMALL
+ case SEQ_LITERAL:
+ do {
+ rc_bit(probs[symbol], , , SEQ_LITERAL);
+ } while (symbol < (1 << 8));
+#else
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL0);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL1);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL2);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL3);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL4);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL5);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL6);
+ rc_bit_case(probs[symbol], , , SEQ_LITERAL7);
+#endif
+ } else {
+ // Decode literal with match byte.
+ //
+ // We store the byte we compare against
+ // ("match byte") to "len" to minimize the
+ // number of variables we need to store
+ // between decoder calls.
+ len = (uint32_t)(dict_get(&dict, rep0)) << 1;
+
+ // The usage of "offset" allows omitting some
+ // branches, which should give tiny speed
+ // improvement on some CPUs. "offset" gets
+ // set to zero if match_bit didn't match.
+ offset = 0x100;
+
+#ifdef HAVE_SMALL
+ case SEQ_LITERAL_MATCHED:
+ do {
+ const uint32_t match_bit
+ = len & offset;
+ const uint32_t subcoder_index
+ = offset + match_bit
+ + symbol;
+
+ rc_bit(probs[subcoder_index],
+ offset &= ~match_bit,
+ offset &= match_bit,
+ SEQ_LITERAL_MATCHED);
+
+ // It seems to be faster to do this
+ // here instead of putting it to the
+ // beginning of the loop and then
+ // putting the "case" in the middle
+ // of the loop.
+ len <<= 1;
+
+ } while (symbol < (1 << 8));
+#else
+ // Unroll the loop.
+ uint32_t match_bit;
+ uint32_t subcoder_index;
+
+# define d(seq) \
+ case seq: \
+ match_bit = len & offset; \
+ subcoder_index = offset + match_bit + symbol; \
+ rc_bit(probs[subcoder_index], \
+ offset &= ~match_bit, \
+ offset &= match_bit, \
+ seq)
+
+ d(SEQ_LITERAL_MATCHED0);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED1);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED2);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED3);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED4);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED5);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED6);
+ len <<= 1;
+ d(SEQ_LITERAL_MATCHED7);
+# undef d
+#endif
+ }
+
+ //update_literal(state);
+ // Use a lookup table to update to literal state,
+ // since compared to other state updates, this would
+ // need two branches.
+ static const lzma_lzma_state next_state[] = {
+ STATE_LIT_LIT,
+ STATE_LIT_LIT,
+ STATE_LIT_LIT,
+ STATE_LIT_LIT,
+ STATE_MATCH_LIT_LIT,
+ STATE_REP_LIT_LIT,
+ STATE_SHORTREP_LIT_LIT,
+ STATE_MATCH_LIT,
+ STATE_REP_LIT,
+ STATE_SHORTREP_LIT,
+ STATE_MATCH_LIT,
+ STATE_REP_LIT
+ };
+ state = next_state[state];
+
+ case SEQ_LITERAL_WRITE:
+ if (unlikely(dict_put(&dict, symbol))) {
+ coder->sequence = SEQ_LITERAL_WRITE;
+ goto out;
+ }
+
+ continue;
+ }
+
+ // Instead of a new byte we are going to get a byte range
+ // (distance and length) which will be repeated from our
+ // output history.
+
+ rc_update_1(coder->is_match[state][pos_state]);
+
+ case SEQ_IS_REP:
+ rc_if_0(coder->is_rep[state], SEQ_IS_REP) {
+ // Not a repeated match
+ rc_update_0(coder->is_rep[state]);
+ update_match(state);
+
+ // The latest three match distances are kept in
+ // memory in case there are repeated matches.
+ rep3 = rep2;
+ rep2 = rep1;
+ rep1 = rep0;
+
+ // Decode the length of the match.
+ len_decode(len, coder->match_len_decoder,
+ pos_state, SEQ_MATCH_LEN);
+
+ // Prepare to decode the highest two bits of the
+ // match distance.
+ probs = coder->dist_slot[get_dist_state(len)];
+ symbol = 1;
+
+#ifdef HAVE_SMALL
+ case SEQ_DIST_SLOT:
+ do {
+ rc_bit(probs[symbol], , , SEQ_DIST_SLOT);
+ } while (symbol < DIST_SLOTS);
+#else
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT0);
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT1);
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT2);
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT3);
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT4);
+ rc_bit_case(probs[symbol], , , SEQ_DIST_SLOT5);
+#endif
+ // Get rid of the highest bit that was needed for
+ // indexing of the probability array.
+ symbol -= DIST_SLOTS;
+ assert(symbol <= 63);
+
+ if (symbol < DIST_MODEL_START) {
+ // Match distances [0, 3] have only two bits.
+ rep0 = symbol;
+ } else {
+ // Decode the lowest [1, 29] bits of
+ // the match distance.
+ limit = (symbol >> 1) - 1;
+ assert(limit >= 1 && limit <= 30);
+ rep0 = 2 + (symbol & 1);
+
+ if (symbol < DIST_MODEL_END) {
+ // Prepare to decode the low bits for
+ // a distance of [4, 127].
+ assert(limit <= 5);
+ rep0 <<= limit;
+ assert(rep0 <= 96);
+ // -1 is fine, because we start
+ // decoding at probs[1], not probs[0].
+ // NOTE: This violates the C standard,
+ // since we are doing pointer
+ // arithmetic past the beginning of
+ // the array.
+ assert((int32_t)(rep0 - symbol - 1)
+ >= -1);
+ assert((int32_t)(rep0 - symbol - 1)
+ <= 82);
+ probs = coder->pos_special + rep0
+ - symbol - 1;
+ symbol = 1;
+ offset = 0;
+ case SEQ_DIST_MODEL:
+#ifdef HAVE_SMALL
+ do {
+ rc_bit(probs[symbol], ,
+ rep0 += 1U << offset,
+ SEQ_DIST_MODEL);
+ } while (++offset < limit);
+#else
+ switch (limit) {
+ case 5:
+ assert(offset == 0);
+ rc_bit(probs[symbol], ,
+ rep0 += 1U,
+ SEQ_DIST_MODEL);
+ ++offset;
+ --limit;
+ case 4:
+ rc_bit(probs[symbol], ,
+ rep0 += 1U << offset,
+ SEQ_DIST_MODEL);
+ ++offset;
+ --limit;
+ case 3:
+ rc_bit(probs[symbol], ,
+ rep0 += 1U << offset,
+ SEQ_DIST_MODEL);
+ ++offset;
+ --limit;
+ case 2:
+ rc_bit(probs[symbol], ,
+ rep0 += 1U << offset,
+ SEQ_DIST_MODEL);
+ ++offset;
+ --limit;
+ case 1:
+ // We need "symbol" only for
+ // indexing the probability
+ // array, thus we can use
+ // rc_bit_last() here to omit
+ // the unneeded updating of
+ // "symbol".
+ rc_bit_last(probs[symbol], ,
+ rep0 += 1U << offset,
+ SEQ_DIST_MODEL);
+ }
+#endif
+ } else {
+ // The distance is >= 128. Decode the
+ // lower bits without probabilities
+ // except the lowest four bits.
+ assert(symbol >= 14);
+ assert(limit >= 6);
+ limit -= ALIGN_BITS;
+ assert(limit >= 2);
+ case SEQ_DIRECT:
+ // Not worth manual unrolling
+ do {
+ rc_direct(rep0, SEQ_DIRECT);
+ } while (--limit > 0);
+
+ // Decode the lowest four bits using
+ // probabilities.
+ rep0 <<= ALIGN_BITS;
+ symbol = 1;
+#ifdef HAVE_SMALL
+ offset = 0;
+ case SEQ_ALIGN:
+ do {
+ rc_bit(coder->pos_align[
+ symbol], ,
+ rep0 += 1U << offset,
+ SEQ_ALIGN);
+ } while (++offset < ALIGN_BITS);
+#else
+ case SEQ_ALIGN0:
+ rc_bit(coder->pos_align[symbol], ,
+ rep0 += 1, SEQ_ALIGN0);
+ case SEQ_ALIGN1:
+ rc_bit(coder->pos_align[symbol], ,
+ rep0 += 2, SEQ_ALIGN1);
+ case SEQ_ALIGN2:
+ rc_bit(coder->pos_align[symbol], ,
+ rep0 += 4, SEQ_ALIGN2);
+ case SEQ_ALIGN3:
+ // Like in SEQ_DIST_MODEL, we don't
+ // need "symbol" for anything else
+ // than indexing the probability array.
+ rc_bit_last(coder->pos_align[symbol], ,
+ rep0 += 8, SEQ_ALIGN3);
+#endif
+
+ if (rep0 == UINT32_MAX) {
+ // End of payload marker was
+ // found. It may only be
+ // present if
+ // - uncompressed size is
+ // unknown or
+ // - after known uncompressed
+ // size amount of bytes has
+ // been decompressed and
+ // caller has indicated
+ // that EOPM might be used
+ // (it's not allowed in
+ // LZMA2).
+ if (!eopm_is_valid) {
+ ret = LZMA_DATA_ERROR;
+ goto out;
+ }
+
+ case SEQ_EOPM:
+ // LZMA1 stream with
+ // end-of-payload marker.
+ rc_normalize(SEQ_EOPM);
+ ret = rc_is_finished(rc)
+ ? LZMA_STREAM_END
+ : LZMA_DATA_ERROR;
+ goto out;
+ }
+ }
+ }
+
+ // Validate the distance we just decoded.
+ if (unlikely(!dict_is_distance_valid(&dict, rep0))) {
+ ret = LZMA_DATA_ERROR;
+ goto out;
+ }
+
+ } else {
+ rc_update_1(coder->is_rep[state]);
+
+ // Repeated match
+ //
+ // The match distance is a value that we have had
+ // earlier. The latest four match distances are
+ // available as rep0, rep1, rep2 and rep3. We will
+ // now decode which of them is the new distance.
+ //
+ // There cannot be a match if we haven't produced
+ // any output, so check that first.
+ if (unlikely(!dict_is_distance_valid(&dict, 0))) {
+ ret = LZMA_DATA_ERROR;
+ goto out;
+ }
+
+ case SEQ_IS_REP0:
+ rc_if_0(coder->is_rep0[state], SEQ_IS_REP0) {
+ rc_update_0(coder->is_rep0[state]);
+ // The distance is rep0.
+
+ case SEQ_IS_REP0_LONG:
+ rc_if_0(coder->is_rep0_long[state][pos_state],
+ SEQ_IS_REP0_LONG) {
+ rc_update_0(coder->is_rep0_long[
+ state][pos_state]);
+
+ update_short_rep(state);
+
+ case SEQ_SHORTREP:
+ if (unlikely(dict_put(&dict, dict_get(
+ &dict, rep0)))) {
+ coder->sequence = SEQ_SHORTREP;
+ goto out;
+ }
+
+ continue;
+ }
+
+ // Repeating more than one byte at
+ // distance of rep0.
+ rc_update_1(coder->is_rep0_long[
+ state][pos_state]);
+
+ } else {
+ rc_update_1(coder->is_rep0[state]);
+
+ case SEQ_IS_REP1:
+ // The distance is rep1, rep2 or rep3. Once
+ // we find out which one of these three, it
+ // is stored to rep0 and rep1, rep2 and rep3
+ // are updated accordingly.
+ rc_if_0(coder->is_rep1[state], SEQ_IS_REP1) {
+ rc_update_0(coder->is_rep1[state]);
+
+ const uint32_t distance = rep1;
+ rep1 = rep0;
+ rep0 = distance;
+
+ } else {
+ rc_update_1(coder->is_rep1[state]);
+ case SEQ_IS_REP2:
+ rc_if_0(coder->is_rep2[state],
+ SEQ_IS_REP2) {
+ rc_update_0(coder->is_rep2[
+ state]);
+
+ const uint32_t distance = rep2;
+ rep2 = rep1;
+ rep1 = rep0;
+ rep0 = distance;
+
+ } else {
+ rc_update_1(coder->is_rep2[
+ state]);
+
+ const uint32_t distance = rep3;
+ rep3 = rep2;
+ rep2 = rep1;
+ rep1 = rep0;
+ rep0 = distance;
+ }
+ }
+ }
+
+ update_long_rep(state);
+
+ // Decode the length of the repeated match.
+ len_decode(len, coder->rep_len_decoder,
+ pos_state, SEQ_REP_LEN);
+ }
+
+ /////////////////////////////////
+ // Repeat from history buffer. //
+ /////////////////////////////////
+
+ // The length is always between these limits. There is no way
+ // to trigger the algorithm to set len outside this range.
+ assert(len >= MATCH_LEN_MIN);
+ assert(len <= MATCH_LEN_MAX);
+
+ case SEQ_COPY:
+ // Repeat len bytes from distance of rep0.
+ if (unlikely(dict_repeat(&dict, rep0, &len))) {
+ coder->sequence = SEQ_COPY;
+ goto out;
+ }
+ }
+
+out:
+ // Save state
+
+ // NOTE: Must not copy dict.limit.
+ dictptr->pos = dict.pos;
+ dictptr->full = dict.full;
+
+ rc_from_local(coder->rc, *in_pos);
+
+ coder->state = state;
+ coder->rep0 = rep0;
+ coder->rep1 = rep1;
+ coder->rep2 = rep2;
+ coder->rep3 = rep3;
+
+ coder->probs = probs;
+ coder->symbol = symbol;
+ coder->limit = limit;
+ coder->offset = offset;
+ coder->len = len;
+
+ // Update the remaining amount of uncompressed data if uncompressed
+ // size was known.
+ if (coder->uncompressed_size != LZMA_VLI_UNKNOWN) {
+ coder->uncompressed_size -= dict.pos - dict_start;
+
+ // If we have gotten all the output but the decoder wants
+ // to write more output, the file is corrupt. There are
+ // three SEQ values where output is produced.
+ if (coder->uncompressed_size == 0 && ret == LZMA_OK
+ && (coder->sequence == SEQ_LITERAL_WRITE
+ || coder->sequence == SEQ_SHORTREP
+ || coder->sequence == SEQ_COPY))
+ ret = LZMA_DATA_ERROR;
+ }
+
+ if (ret == LZMA_STREAM_END) {
+ // Reset the range decoder so that it is ready to reinitialize
+ // for a new LZMA2 chunk.
+ rc_reset(coder->rc);
+ coder->sequence = SEQ_IS_MATCH;
+ }
+
+ return ret;
+}
+
+
+
+static void
+lzma_decoder_uncompressed(void *coder_ptr, lzma_vli uncompressed_size,
+ bool allow_eopm)
+{
+ lzma_lzma1_decoder *coder = coder_ptr;
+ coder->uncompressed_size = uncompressed_size;
+ coder->allow_eopm = allow_eopm;
+}
+
+
+static void
+lzma_decoder_reset(void *coder_ptr, const void *opt)
+{
+ lzma_lzma1_decoder *coder = coder_ptr;
+ const lzma_options_lzma *options = opt;
+
+ // NOTE: We assume that lc/lp/pb are valid since they were
+ // successfully decoded with lzma_lzma_decode_properties().
+
+ // Calculate pos_mask. We don't need pos_bits as is for anything.
+ coder->pos_mask = (1U << options->pb) - 1;
+
+ // Initialize the literal decoder.
+ literal_init(coder->literal, options->lc, options->lp);
+
+ coder->literal_context_bits = options->lc;
+ coder->literal_pos_mask = (1U << options->lp) - 1;
+
+ // State
+ coder->state = STATE_LIT_LIT;
+ coder->rep0 = 0;
+ coder->rep1 = 0;
+ coder->rep2 = 0;
+ coder->rep3 = 0;
+ coder->pos_mask = (1U << options->pb) - 1;
+
+ // Range decoder
+ rc_reset(coder->rc);
+
+ // Bit and bittree decoders
+ for (uint32_t i = 0; i < STATES; ++i) {
+ for (uint32_t j = 0; j <= coder->pos_mask; ++j) {
+ bit_reset(coder->is_match[i][j]);
+ bit_reset(coder->is_rep0_long[i][j]);
+ }
+
+ bit_reset(coder->is_rep[i]);
+ bit_reset(coder->is_rep0[i]);
+ bit_reset(coder->is_rep1[i]);
+ bit_reset(coder->is_rep2[i]);
+ }
+
+ for (uint32_t i = 0; i < DIST_STATES; ++i)
+ bittree_reset(coder->dist_slot[i], DIST_SLOT_BITS);
+
+ for (uint32_t i = 0; i < FULL_DISTANCES - DIST_MODEL_END; ++i)
+ bit_reset(coder->pos_special[i]);
+
+ bittree_reset(coder->pos_align, ALIGN_BITS);
+
+ // Len decoders (also bit/bittree)
+ const uint32_t num_pos_states = 1U << options->pb;
+ bit_reset(coder->match_len_decoder.choice);
+ bit_reset(coder->match_len_decoder.choice2);
+ bit_reset(coder->rep_len_decoder.choice);
+ bit_reset(coder->rep_len_decoder.choice2);
+
+ for (uint32_t pos_state = 0; pos_state < num_pos_states; ++pos_state) {
+ bittree_reset(coder->match_len_decoder.low[pos_state],
+ LEN_LOW_BITS);
+ bittree_reset(coder->match_len_decoder.mid[pos_state],
+ LEN_MID_BITS);
+
+ bittree_reset(coder->rep_len_decoder.low[pos_state],
+ LEN_LOW_BITS);
+ bittree_reset(coder->rep_len_decoder.mid[pos_state],
+ LEN_MID_BITS);
+ }
+
+ bittree_reset(coder->match_len_decoder.high, LEN_HIGH_BITS);
+ bittree_reset(coder->rep_len_decoder.high, LEN_HIGH_BITS);
+
+ coder->sequence = SEQ_IS_MATCH;
+ coder->probs = NULL;
+ coder->symbol = 0;
+ coder->limit = 0;
+ coder->offset = 0;
+ coder->len = 0;
+
+ return;
+}
+
+
+extern lzma_ret
+lzma_lzma_decoder_create(lzma_lz_decoder *lz, const lzma_allocator *allocator,
+ const lzma_options_lzma *options, lzma_lz_options *lz_options)
+{
+ if (lz->coder == NULL) {
+ lz->coder = lzma_alloc(sizeof(lzma_lzma1_decoder), allocator);
+ if (lz->coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ lz->code = &lzma_decode;
+ lz->reset = &lzma_decoder_reset;
+ lz->set_uncompressed = &lzma_decoder_uncompressed;
+ }
+
+ // All dictionary sizes are OK here. LZ decoder will take care of
+ // the special cases.
+ lz_options->dict_size = options->dict_size;
+ lz_options->preset_dict = options->preset_dict;
+ lz_options->preset_dict_size = options->preset_dict_size;
+
+ return LZMA_OK;
+}
+
+
+/// Allocate and initialize LZMA decoder. This is used only via LZ
+/// initialization (lzma_lzma_decoder_init() passes function pointer to
+/// the LZ initialization).
+static lzma_ret
+lzma_decoder_init(lzma_lz_decoder *lz, const lzma_allocator *allocator,
+ lzma_vli id, const void *options, lzma_lz_options *lz_options)
+{
+ if (!is_lclppb_valid(options))
+ return LZMA_PROG_ERROR;
+
+ lzma_vli uncomp_size = LZMA_VLI_UNKNOWN;
+ bool allow_eopm = true;
+
+ if (id == LZMA_FILTER_LZMA1EXT) {
+ const lzma_options_lzma *opt = options;
+
+ // Only one flag is supported.
+ if (opt->ext_flags & ~LZMA_LZMA1EXT_ALLOW_EOPM)
+ return LZMA_OPTIONS_ERROR;
+
+ // FIXME? Using lzma_vli instead of uint64_t is weird because
+ // this has nothing to do with .xz headers and variable-length
+ // integer encoding. On the other hand, using LZMA_VLI_UNKNOWN
+ // instead of UINT64_MAX is clearer when unknown size is
+ // meant. A problem with using lzma_vli is that now we
+ // allow > LZMA_VLI_MAX which is fine in this file but
+ // it's still confusing. Note that alone_decoder.c also
+ // allows > LZMA_VLI_MAX when setting uncompressed size.
+ uncomp_size = opt->ext_size_low
+ + ((uint64_t)(opt->ext_size_high) << 32);
+ allow_eopm = (opt->ext_flags & LZMA_LZMA1EXT_ALLOW_EOPM) != 0
+ || uncomp_size == LZMA_VLI_UNKNOWN;
+ }
+
+ return_if_error(lzma_lzma_decoder_create(
+ lz, allocator, options, lz_options));
+
+ lzma_decoder_reset(lz->coder, options);
+ lzma_decoder_uncompressed(lz->coder, uncomp_size, allow_eopm);
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_lzma_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ // LZMA can only be the last filter in the chain. This is enforced
+ // by the raw_decoder initialization.
+ assert(filters[1].init == NULL);
+
+ return lzma_lz_decoder_init(next, allocator, filters,
+ &lzma_decoder_init);
+}
+
+
+extern bool
+lzma_lzma_lclppb_decode(lzma_options_lzma *options, uint8_t byte)
+{
+ if (byte > (4 * 5 + 4) * 9 + 8)
+ return true;
+
+ // See the file format specification to understand this.
+ options->pb = byte / (9 * 5);
+ byte -= options->pb * 9 * 5;
+ options->lp = byte / 9;
+ options->lc = byte - options->lp * 9;
+
+ return options->lc + options->lp > LZMA_LCLP_MAX;
+}
+
+
+extern uint64_t
+lzma_lzma_decoder_memusage_nocheck(const void *options)
+{
+ const lzma_options_lzma *const opt = options;
+ return sizeof(lzma_lzma1_decoder)
+ + lzma_lz_decoder_memusage(opt->dict_size);
+}
+
+
+extern uint64_t
+lzma_lzma_decoder_memusage(const void *options)
+{
+ if (!is_lclppb_valid(options))
+ return UINT64_MAX;
+
+ return lzma_lzma_decoder_memusage_nocheck(options);
+}
+
+
+extern lzma_ret
+lzma_lzma_props_decode(void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ if (props_size != 5)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_options_lzma *opt
+ = lzma_alloc(sizeof(lzma_options_lzma), allocator);
+ if (opt == NULL)
+ return LZMA_MEM_ERROR;
+
+ if (lzma_lzma_lclppb_decode(opt, props[0]))
+ goto error;
+
+ // All dictionary sizes are accepted, including zero. LZ decoder
+ // will automatically use a dictionary at least a few KiB even if
+ // a smaller dictionary is requested.
+ opt->dict_size = read32le(props + 1);
+
+ opt->preset_dict = NULL;
+ opt->preset_dict_size = 0;
+
+ *options = opt;
+
+ return LZMA_OK;
+
+error:
+ lzma_free(opt, allocator);
+ return LZMA_OPTIONS_ERROR;
+}
diff --git a/src/liblzma/lzma/lzma_decoder.h b/src/liblzma/lzma/lzma_decoder.h
new file mode 100644
index 0000000..1427bc2
--- /dev/null
+++ b/src/liblzma/lzma/lzma_decoder.h
@@ -0,0 +1,53 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_decoder.h
+/// \brief LZMA decoder API
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA_DECODER_H
+#define LZMA_LZMA_DECODER_H
+
+#include "common.h"
+
+
+/// Allocates and initializes LZMA decoder
+extern lzma_ret lzma_lzma_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern uint64_t lzma_lzma_decoder_memusage(const void *options);
+
+extern lzma_ret lzma_lzma_props_decode(
+ void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size);
+
+
+/// \brief Decodes the LZMA Properties byte (lc/lp/pb)
+///
+/// \return true if error occurred, false on success
+///
+extern bool lzma_lzma_lclppb_decode(
+ lzma_options_lzma *options, uint8_t byte);
+
+
+#ifdef LZMA_LZ_DECODER_H
+/// Allocate and setup function pointers only. This is used by LZMA1 and
+/// LZMA2 decoders.
+extern lzma_ret lzma_lzma_decoder_create(
+ lzma_lz_decoder *lz, const lzma_allocator *allocator,
+ const lzma_options_lzma *opt, lzma_lz_options *lz_options);
+
+/// Gets memory usage without validating lc/lp/pb. This is used by LZMA2
+/// decoder, because raw LZMA2 decoding doesn't need lc/lp/pb.
+extern uint64_t lzma_lzma_decoder_memusage_nocheck(const void *options);
+
+#endif
+
+#endif
diff --git a/src/liblzma/lzma/lzma_encoder.c b/src/liblzma/lzma/lzma_encoder.c
new file mode 100644
index 0000000..559c63e
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder.c
@@ -0,0 +1,784 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder.c
+/// \brief LZMA encoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma2_encoder.h"
+#include "lzma_encoder_private.h"
+#include "fastpos.h"
+
+
+/////////////
+// Literal //
+/////////////
+
+static inline void
+literal_matched(lzma_range_encoder *rc, probability *subcoder,
+ uint32_t match_byte, uint32_t symbol)
+{
+ uint32_t offset = 0x100;
+ symbol += UINT32_C(1) << 8;
+
+ do {
+ match_byte <<= 1;
+ const uint32_t match_bit = match_byte & offset;
+ const uint32_t subcoder_index
+ = offset + match_bit + (symbol >> 8);
+ const uint32_t bit = (symbol >> 7) & 1;
+ rc_bit(rc, &subcoder[subcoder_index], bit);
+
+ symbol <<= 1;
+ offset &= ~(match_byte ^ symbol);
+
+ } while (symbol < (UINT32_C(1) << 16));
+}
+
+
+static inline void
+literal(lzma_lzma1_encoder *coder, lzma_mf *mf, uint32_t position)
+{
+ // Locate the literal byte to be encoded and the subcoder.
+ const uint8_t cur_byte = mf->buffer[
+ mf->read_pos - mf->read_ahead];
+ probability *subcoder = literal_subcoder(coder->literal,
+ coder->literal_context_bits, coder->literal_pos_mask,
+ position, mf->buffer[mf->read_pos - mf->read_ahead - 1]);
+
+ if (is_literal_state(coder->state)) {
+ // Previous LZMA-symbol was a literal. Encode a normal
+ // literal without a match byte.
+ rc_bittree(&coder->rc, subcoder, 8, cur_byte);
+ } else {
+ // Previous LZMA-symbol was a match. Use the last byte of
+ // the match as a "match byte". That is, compare the bits
+ // of the current literal and the match byte.
+ const uint8_t match_byte = mf->buffer[
+ mf->read_pos - coder->reps[0] - 1
+ - mf->read_ahead];
+ literal_matched(&coder->rc, subcoder, match_byte, cur_byte);
+ }
+
+ update_literal(coder->state);
+}
+
+
+//////////////////
+// Match length //
+//////////////////
+
+static void
+length_update_prices(lzma_length_encoder *lc, const uint32_t pos_state)
+{
+ const uint32_t table_size = lc->table_size;
+ lc->counters[pos_state] = table_size;
+
+ const uint32_t a0 = rc_bit_0_price(lc->choice);
+ const uint32_t a1 = rc_bit_1_price(lc->choice);
+ const uint32_t b0 = a1 + rc_bit_0_price(lc->choice2);
+ const uint32_t b1 = a1 + rc_bit_1_price(lc->choice2);
+ uint32_t *const prices = lc->prices[pos_state];
+
+ uint32_t i;
+ for (i = 0; i < table_size && i < LEN_LOW_SYMBOLS; ++i)
+ prices[i] = a0 + rc_bittree_price(lc->low[pos_state],
+ LEN_LOW_BITS, i);
+
+ for (; i < table_size && i < LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS; ++i)
+ prices[i] = b0 + rc_bittree_price(lc->mid[pos_state],
+ LEN_MID_BITS, i - LEN_LOW_SYMBOLS);
+
+ for (; i < table_size; ++i)
+ prices[i] = b1 + rc_bittree_price(lc->high, LEN_HIGH_BITS,
+ i - LEN_LOW_SYMBOLS - LEN_MID_SYMBOLS);
+
+ return;
+}
+
+
+static inline void
+length(lzma_range_encoder *rc, lzma_length_encoder *lc,
+ const uint32_t pos_state, uint32_t len, const bool fast_mode)
+{
+ assert(len <= MATCH_LEN_MAX);
+ len -= MATCH_LEN_MIN;
+
+ if (len < LEN_LOW_SYMBOLS) {
+ rc_bit(rc, &lc->choice, 0);
+ rc_bittree(rc, lc->low[pos_state], LEN_LOW_BITS, len);
+ } else {
+ rc_bit(rc, &lc->choice, 1);
+ len -= LEN_LOW_SYMBOLS;
+
+ if (len < LEN_MID_SYMBOLS) {
+ rc_bit(rc, &lc->choice2, 0);
+ rc_bittree(rc, lc->mid[pos_state], LEN_MID_BITS, len);
+ } else {
+ rc_bit(rc, &lc->choice2, 1);
+ len -= LEN_MID_SYMBOLS;
+ rc_bittree(rc, lc->high, LEN_HIGH_BITS, len);
+ }
+ }
+
+ // Only getoptimum uses the prices so don't update the table when
+ // in fast mode.
+ if (!fast_mode)
+ if (--lc->counters[pos_state] == 0)
+ length_update_prices(lc, pos_state);
+}
+
+
+///////////
+// Match //
+///////////
+
+static inline void
+match(lzma_lzma1_encoder *coder, const uint32_t pos_state,
+ const uint32_t distance, const uint32_t len)
+{
+ update_match(coder->state);
+
+ length(&coder->rc, &coder->match_len_encoder, pos_state, len,
+ coder->fast_mode);
+
+ const uint32_t dist_slot = get_dist_slot(distance);
+ const uint32_t dist_state = get_dist_state(len);
+ rc_bittree(&coder->rc, coder->dist_slot[dist_state],
+ DIST_SLOT_BITS, dist_slot);
+
+ if (dist_slot >= DIST_MODEL_START) {
+ const uint32_t footer_bits = (dist_slot >> 1) - 1;
+ const uint32_t base = (2 | (dist_slot & 1)) << footer_bits;
+ const uint32_t dist_reduced = distance - base;
+
+ if (dist_slot < DIST_MODEL_END) {
+ // Careful here: base - dist_slot - 1 can be -1, but
+ // rc_bittree_reverse starts at probs[1], not probs[0].
+ rc_bittree_reverse(&coder->rc,
+ coder->dist_special + base - dist_slot - 1,
+ footer_bits, dist_reduced);
+ } else {
+ rc_direct(&coder->rc, dist_reduced >> ALIGN_BITS,
+ footer_bits - ALIGN_BITS);
+ rc_bittree_reverse(
+ &coder->rc, coder->dist_align,
+ ALIGN_BITS, dist_reduced & ALIGN_MASK);
+ ++coder->align_price_count;
+ }
+ }
+
+ coder->reps[3] = coder->reps[2];
+ coder->reps[2] = coder->reps[1];
+ coder->reps[1] = coder->reps[0];
+ coder->reps[0] = distance;
+ ++coder->match_price_count;
+}
+
+
+////////////////////
+// Repeated match //
+////////////////////
+
+static inline void
+rep_match(lzma_lzma1_encoder *coder, const uint32_t pos_state,
+ const uint32_t rep, const uint32_t len)
+{
+ if (rep == 0) {
+ rc_bit(&coder->rc, &coder->is_rep0[coder->state], 0);
+ rc_bit(&coder->rc,
+ &coder->is_rep0_long[coder->state][pos_state],
+ len != 1);
+ } else {
+ const uint32_t distance = coder->reps[rep];
+ rc_bit(&coder->rc, &coder->is_rep0[coder->state], 1);
+
+ if (rep == 1) {
+ rc_bit(&coder->rc, &coder->is_rep1[coder->state], 0);
+ } else {
+ rc_bit(&coder->rc, &coder->is_rep1[coder->state], 1);
+ rc_bit(&coder->rc, &coder->is_rep2[coder->state],
+ rep - 2);
+
+ if (rep == 3)
+ coder->reps[3] = coder->reps[2];
+
+ coder->reps[2] = coder->reps[1];
+ }
+
+ coder->reps[1] = coder->reps[0];
+ coder->reps[0] = distance;
+ }
+
+ if (len == 1) {
+ update_short_rep(coder->state);
+ } else {
+ length(&coder->rc, &coder->rep_len_encoder, pos_state, len,
+ coder->fast_mode);
+ update_long_rep(coder->state);
+ }
+}
+
+
+//////////
+// Main //
+//////////
+
+static void
+encode_symbol(lzma_lzma1_encoder *coder, lzma_mf *mf,
+ uint32_t back, uint32_t len, uint32_t position)
+{
+ const uint32_t pos_state = position & coder->pos_mask;
+
+ if (back == UINT32_MAX) {
+ // Literal i.e. eight-bit byte
+ assert(len == 1);
+ rc_bit(&coder->rc,
+ &coder->is_match[coder->state][pos_state], 0);
+ literal(coder, mf, position);
+ } else {
+ // Some type of match
+ rc_bit(&coder->rc,
+ &coder->is_match[coder->state][pos_state], 1);
+
+ if (back < REPS) {
+ // It's a repeated match i.e. the same distance
+ // has been used earlier.
+ rc_bit(&coder->rc, &coder->is_rep[coder->state], 1);
+ rep_match(coder, pos_state, back, len);
+ } else {
+ // Normal match
+ rc_bit(&coder->rc, &coder->is_rep[coder->state], 0);
+ match(coder, pos_state, back - REPS, len);
+ }
+ }
+
+ assert(mf->read_ahead >= len);
+ mf->read_ahead -= len;
+}
+
+
+static bool
+encode_init(lzma_lzma1_encoder *coder, lzma_mf *mf)
+{
+ assert(mf_position(mf) == 0);
+ assert(coder->uncomp_size == 0);
+
+ if (mf->read_pos == mf->read_limit) {
+ if (mf->action == LZMA_RUN)
+ return false; // We cannot do anything.
+
+ // We are finishing (we cannot get here when flushing).
+ assert(mf->write_pos == mf->read_pos);
+ assert(mf->action == LZMA_FINISH);
+ } else {
+ // Do the actual initialization. The first LZMA symbol must
+ // always be a literal.
+ mf_skip(mf, 1);
+ mf->read_ahead = 0;
+ rc_bit(&coder->rc, &coder->is_match[0][0], 0);
+ rc_bittree(&coder->rc, coder->literal[0], 8, mf->buffer[0]);
+ ++coder->uncomp_size;
+ }
+
+ // Initialization is done (except if empty file).
+ coder->is_initialized = true;
+
+ return true;
+}
+
+
+static void
+encode_eopm(lzma_lzma1_encoder *coder, uint32_t position)
+{
+ const uint32_t pos_state = position & coder->pos_mask;
+ rc_bit(&coder->rc, &coder->is_match[coder->state][pos_state], 1);
+ rc_bit(&coder->rc, &coder->is_rep[coder->state], 0);
+ match(coder, pos_state, UINT32_MAX, MATCH_LEN_MIN);
+}
+
+
+/// Number of bytes that a single encoding loop in lzma_lzma_encode() can
+/// consume from the dictionary. This limit comes from lzma_lzma_optimum()
+/// and may need to be updated if that function is significantly modified.
+#define LOOP_INPUT_MAX (OPTS + 1)
+
+
+extern lzma_ret
+lzma_lzma_encode(lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size, uint32_t limit)
+{
+ // Initialize the stream if no data has been encoded yet.
+ if (!coder->is_initialized && !encode_init(coder, mf))
+ return LZMA_OK;
+
+ // Encode pending output bytes from the range encoder.
+ // At the start of the stream, encode_init() encodes one literal.
+ // Later there can be pending output only with LZMA1 because LZMA2
+ // ensures that there is always enough output space. Thus when using
+ // LZMA2, rc_encode() calls in this function will always return false.
+ if (rc_encode(&coder->rc, out, out_pos, out_size)) {
+ // We don't get here with LZMA2.
+ assert(limit == UINT32_MAX);
+ return LZMA_OK;
+ }
+
+ // If the range encoder was flushed in an earlier call to this
+ // function but there wasn't enough output buffer space, those
+ // bytes would have now been encoded by the above rc_encode() call
+ // and the stream has now been finished. This can only happen with
+ // LZMA1 as LZMA2 always provides enough output buffer space.
+ if (coder->is_flushed) {
+ assert(limit == UINT32_MAX);
+ return LZMA_STREAM_END;
+ }
+
+ while (true) {
+ // With LZMA2 we need to take care that compressed size of
+ // a chunk doesn't get too big.
+ // FIXME? Check if this could be improved.
+ if (limit != UINT32_MAX
+ && (mf->read_pos - mf->read_ahead >= limit
+ || *out_pos + rc_pending(&coder->rc)
+ >= LZMA2_CHUNK_MAX
+ - LOOP_INPUT_MAX))
+ break;
+
+ // Check that there is some input to process.
+ if (mf->read_pos >= mf->read_limit) {
+ if (mf->action == LZMA_RUN)
+ return LZMA_OK;
+
+ if (mf->read_ahead == 0)
+ break;
+ }
+
+ // Get optimal match (repeat position and length).
+ // Value ranges for pos:
+ // - [0, REPS): repeated match
+ // - [REPS, UINT32_MAX):
+ // match at (pos - REPS)
+ // - UINT32_MAX: not a match but a literal
+ // Value ranges for len:
+ // - [MATCH_LEN_MIN, MATCH_LEN_MAX]
+ uint32_t len;
+ uint32_t back;
+
+ if (coder->fast_mode)
+ lzma_lzma_optimum_fast(coder, mf, &back, &len);
+ else
+ lzma_lzma_optimum_normal(coder, mf, &back, &len,
+ (uint32_t)(coder->uncomp_size));
+
+ encode_symbol(coder, mf, back, len,
+ (uint32_t)(coder->uncomp_size));
+
+ // If output size limiting is active (out_limit != 0), check
+ // if encoding this LZMA symbol would make the output size
+ // exceed the specified limit.
+ if (coder->out_limit != 0 && rc_encode_dummy(
+ &coder->rc, coder->out_limit)) {
+ // The most recent LZMA symbol would make the output
+ // too big. Throw it away.
+ rc_forget(&coder->rc);
+
+ // FIXME: Tell the LZ layer to not read more input as
+ // it would be waste of time. This doesn't matter if
+ // output-size-limited encoding is done with a single
+ // call though.
+
+ break;
+ }
+
+ // This symbol will be encoded so update the uncompressed size.
+ coder->uncomp_size += len;
+
+ // Encode the LZMA symbol.
+ if (rc_encode(&coder->rc, out, out_pos, out_size)) {
+ // Once again, this can only happen with LZMA1.
+ assert(limit == UINT32_MAX);
+ return LZMA_OK;
+ }
+ }
+
+ // Make the uncompressed size available to the application.
+ if (coder->uncomp_size_ptr != NULL)
+ *coder->uncomp_size_ptr = coder->uncomp_size;
+
+ // LZMA2 doesn't use EOPM at LZMA level.
+ //
+ // Plain LZMA streams without EOPM aren't supported except when
+ // output size limiting is enabled.
+ if (coder->use_eopm)
+ encode_eopm(coder, (uint32_t)(coder->uncomp_size));
+
+ // Flush the remaining bytes from the range encoder.
+ rc_flush(&coder->rc);
+
+ // Copy the remaining bytes to the output buffer. If there
+ // isn't enough output space, we will copy out the remaining
+ // bytes on the next call to this function.
+ if (rc_encode(&coder->rc, out, out_pos, out_size)) {
+ // This cannot happen with LZMA2.
+ assert(limit == UINT32_MAX);
+
+ coder->is_flushed = true;
+ return LZMA_OK;
+ }
+
+ return LZMA_STREAM_END;
+}
+
+
+static lzma_ret
+lzma_encode(void *coder, lzma_mf *restrict mf,
+ uint8_t *restrict out, size_t *restrict out_pos,
+ size_t out_size)
+{
+ // Plain LZMA has no support for sync-flushing.
+ if (unlikely(mf->action == LZMA_SYNC_FLUSH))
+ return LZMA_OPTIONS_ERROR;
+
+ return lzma_lzma_encode(coder, mf, out, out_pos, out_size, UINT32_MAX);
+}
+
+
+static lzma_ret
+lzma_lzma_set_out_limit(
+ void *coder_ptr, uint64_t *uncomp_size, uint64_t out_limit)
+{
+ // Minimum output size is 5 bytes but that cannot hold any output
+ // so we use 6 bytes.
+ if (out_limit < 6)
+ return LZMA_BUF_ERROR;
+
+ lzma_lzma1_encoder *coder = coder_ptr;
+ coder->out_limit = out_limit;
+ coder->uncomp_size_ptr = uncomp_size;
+ coder->use_eopm = false;
+ return LZMA_OK;
+}
+
+
+////////////////////
+// Initialization //
+////////////////////
+
+static bool
+is_options_valid(const lzma_options_lzma *options)
+{
+ // Validate some of the options. LZ encoder validates nice_len too
+ // but we need a valid value here earlier.
+ return is_lclppb_valid(options)
+ && options->nice_len >= MATCH_LEN_MIN
+ && options->nice_len <= MATCH_LEN_MAX
+ && (options->mode == LZMA_MODE_FAST
+ || options->mode == LZMA_MODE_NORMAL);
+}
+
+
+static void
+set_lz_options(lzma_lz_options *lz_options, const lzma_options_lzma *options)
+{
+ // LZ encoder initialization does the validation for these so we
+ // don't need to validate here.
+ lz_options->before_size = OPTS;
+ lz_options->dict_size = options->dict_size;
+ lz_options->after_size = LOOP_INPUT_MAX;
+ lz_options->match_len_max = MATCH_LEN_MAX;
+ lz_options->nice_len = my_max(mf_get_hash_bytes(options->mf),
+ options->nice_len);
+ lz_options->match_finder = options->mf;
+ lz_options->depth = options->depth;
+ lz_options->preset_dict = options->preset_dict;
+ lz_options->preset_dict_size = options->preset_dict_size;
+ return;
+}
+
+
+static void
+length_encoder_reset(lzma_length_encoder *lencoder,
+ const uint32_t num_pos_states, const bool fast_mode)
+{
+ bit_reset(lencoder->choice);
+ bit_reset(lencoder->choice2);
+
+ for (size_t pos_state = 0; pos_state < num_pos_states; ++pos_state) {
+ bittree_reset(lencoder->low[pos_state], LEN_LOW_BITS);
+ bittree_reset(lencoder->mid[pos_state], LEN_MID_BITS);
+ }
+
+ bittree_reset(lencoder->high, LEN_HIGH_BITS);
+
+ if (!fast_mode)
+ for (uint32_t pos_state = 0; pos_state < num_pos_states;
+ ++pos_state)
+ length_update_prices(lencoder, pos_state);
+
+ return;
+}
+
+
+extern lzma_ret
+lzma_lzma_encoder_reset(lzma_lzma1_encoder *coder,
+ const lzma_options_lzma *options)
+{
+ if (!is_options_valid(options))
+ return LZMA_OPTIONS_ERROR;
+
+ coder->pos_mask = (1U << options->pb) - 1;
+ coder->literal_context_bits = options->lc;
+ coder->literal_pos_mask = (1U << options->lp) - 1;
+
+ // Range coder
+ rc_reset(&coder->rc);
+
+ // State
+ coder->state = STATE_LIT_LIT;
+ for (size_t i = 0; i < REPS; ++i)
+ coder->reps[i] = 0;
+
+ literal_init(coder->literal, options->lc, options->lp);
+
+ // Bit encoders
+ for (size_t i = 0; i < STATES; ++i) {
+ for (size_t j = 0; j <= coder->pos_mask; ++j) {
+ bit_reset(coder->is_match[i][j]);
+ bit_reset(coder->is_rep0_long[i][j]);
+ }
+
+ bit_reset(coder->is_rep[i]);
+ bit_reset(coder->is_rep0[i]);
+ bit_reset(coder->is_rep1[i]);
+ bit_reset(coder->is_rep2[i]);
+ }
+
+ for (size_t i = 0; i < FULL_DISTANCES - DIST_MODEL_END; ++i)
+ bit_reset(coder->dist_special[i]);
+
+ // Bit tree encoders
+ for (size_t i = 0; i < DIST_STATES; ++i)
+ bittree_reset(coder->dist_slot[i], DIST_SLOT_BITS);
+
+ bittree_reset(coder->dist_align, ALIGN_BITS);
+
+ // Length encoders
+ length_encoder_reset(&coder->match_len_encoder,
+ 1U << options->pb, coder->fast_mode);
+
+ length_encoder_reset(&coder->rep_len_encoder,
+ 1U << options->pb, coder->fast_mode);
+
+ // Price counts are incremented every time appropriate probabilities
+ // are changed. price counts are set to zero when the price tables
+ // are updated, which is done when the appropriate price counts have
+ // big enough value, and lzma_mf.read_ahead == 0 which happens at
+ // least every OPTS (a few thousand) possible price count increments.
+ //
+ // By resetting price counts to UINT32_MAX / 2, we make sure that the
+ // price tables will be initialized before they will be used (since
+ // the value is definitely big enough), and that it is OK to increment
+ // price counts without risk of integer overflow (since UINT32_MAX / 2
+ // is small enough). The current code doesn't increment price counts
+ // before initializing price tables, but it maybe done in future if
+ // we add support for saving the state between LZMA2 chunks.
+ coder->match_price_count = UINT32_MAX / 2;
+ coder->align_price_count = UINT32_MAX / 2;
+
+ coder->opts_end_index = 0;
+ coder->opts_current_index = 0;
+
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_lzma_encoder_create(void **coder_ptr, const lzma_allocator *allocator,
+ lzma_vli id, const lzma_options_lzma *options,
+ lzma_lz_options *lz_options)
+{
+ assert(id == LZMA_FILTER_LZMA1 || id == LZMA_FILTER_LZMA1EXT
+ || id == LZMA_FILTER_LZMA2);
+
+ // Allocate lzma_lzma1_encoder if it wasn't already allocated.
+ if (*coder_ptr == NULL) {
+ *coder_ptr = lzma_alloc(sizeof(lzma_lzma1_encoder), allocator);
+ if (*coder_ptr == NULL)
+ return LZMA_MEM_ERROR;
+ }
+
+ lzma_lzma1_encoder *coder = *coder_ptr;
+
+ // Set compression mode. Note that we haven't validated the options
+ // yet. Invalid options will get rejected by lzma_lzma_encoder_reset()
+ // call at the end of this function.
+ switch (options->mode) {
+ case LZMA_MODE_FAST:
+ coder->fast_mode = true;
+ break;
+
+ case LZMA_MODE_NORMAL: {
+ coder->fast_mode = false;
+
+ // Set dist_table_size.
+ // Round the dictionary size up to next 2^n.
+ //
+ // Currently the maximum encoder dictionary size
+ // is 1.5 GiB due to lz_encoder.c and here we need
+ // to be below 2 GiB to make the rounded up value
+ // fit in an uint32_t and avoid an infinite while-loop
+ // (and undefined behavior due to a too large shift).
+ // So do the same check as in LZ encoder,
+ // limiting to 1.5 GiB.
+ if (options->dict_size > (UINT32_C(1) << 30)
+ + (UINT32_C(1) << 29))
+ return LZMA_OPTIONS_ERROR;
+
+ uint32_t log_size = 0;
+ while ((UINT32_C(1) << log_size) < options->dict_size)
+ ++log_size;
+
+ coder->dist_table_size = log_size * 2;
+
+ // Length encoders' price table size
+ const uint32_t nice_len = my_max(
+ mf_get_hash_bytes(options->mf),
+ options->nice_len);
+
+ coder->match_len_encoder.table_size
+ = nice_len + 1 - MATCH_LEN_MIN;
+ coder->rep_len_encoder.table_size
+ = nice_len + 1 - MATCH_LEN_MIN;
+ break;
+ }
+
+ default:
+ return LZMA_OPTIONS_ERROR;
+ }
+
+ // We don't need to write the first byte as literal if there is
+ // a non-empty preset dictionary. encode_init() wouldn't even work
+ // if there is a non-empty preset dictionary, because encode_init()
+ // assumes that position is zero and previous byte is also zero.
+ coder->is_initialized = options->preset_dict != NULL
+ && options->preset_dict_size > 0;
+ coder->is_flushed = false;
+ coder->uncomp_size = 0;
+ coder->uncomp_size_ptr = NULL;
+
+ // Output size limiting is disabled by default.
+ coder->out_limit = 0;
+
+ // Determine if end marker is wanted:
+ // - It is never used with LZMA2.
+ // - It is always used with LZMA_FILTER_LZMA1 (unless
+ // lzma_lzma_set_out_limit() is called later).
+ // - LZMA_FILTER_LZMA1EXT has a flag for it in the options.
+ coder->use_eopm = (id == LZMA_FILTER_LZMA1);
+ if (id == LZMA_FILTER_LZMA1EXT) {
+ // Check if unsupported flags are present.
+ if (options->ext_flags & ~LZMA_LZMA1EXT_ALLOW_EOPM)
+ return LZMA_OPTIONS_ERROR;
+
+ coder->use_eopm = (options->ext_flags
+ & LZMA_LZMA1EXT_ALLOW_EOPM) != 0;
+
+ // TODO? As long as there are no filters that change the size
+ // of the data, it is enough to look at lzma_stream.total_in
+ // after encoding has been finished to know the uncompressed
+ // size of the LZMA1 stream. But in the future there could be
+ // filters that change the size of the data and then total_in
+ // doesn't work as the LZMA1 stream size might be different
+ // due to another filter in the chain. The problem is simple
+ // to solve: Add another flag to ext_flags and then set
+ // coder->uncomp_size_ptr to the address stored in
+ // lzma_options_lzma.reserved_ptr2 (or _ptr1).
+ }
+
+ set_lz_options(lz_options, options);
+
+ return lzma_lzma_encoder_reset(coder, options);
+}
+
+
+static lzma_ret
+lzma_encoder_init(lzma_lz_encoder *lz, const lzma_allocator *allocator,
+ lzma_vli id, const void *options, lzma_lz_options *lz_options)
+{
+ lz->code = &lzma_encode;
+ lz->set_out_limit = &lzma_lzma_set_out_limit;
+ return lzma_lzma_encoder_create(
+ &lz->coder, allocator, id, options, lz_options);
+}
+
+
+extern lzma_ret
+lzma_lzma_encoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return lzma_lz_encoder_init(
+ next, allocator, filters, &lzma_encoder_init);
+}
+
+
+extern uint64_t
+lzma_lzma_encoder_memusage(const void *options)
+{
+ if (!is_options_valid(options))
+ return UINT64_MAX;
+
+ lzma_lz_options lz_options;
+ set_lz_options(&lz_options, options);
+
+ const uint64_t lz_memusage = lzma_lz_encoder_memusage(&lz_options);
+ if (lz_memusage == UINT64_MAX)
+ return UINT64_MAX;
+
+ return (uint64_t)(sizeof(lzma_lzma1_encoder)) + lz_memusage;
+}
+
+
+extern bool
+lzma_lzma_lclppb_encode(const lzma_options_lzma *options, uint8_t *byte)
+{
+ if (!is_lclppb_valid(options))
+ return true;
+
+ *byte = (options->pb * 5 + options->lp) * 9 + options->lc;
+ assert(*byte <= (4 * 5 + 4) * 9 + 8);
+
+ return false;
+}
+
+
+#ifdef HAVE_ENCODER_LZMA1
+extern lzma_ret
+lzma_lzma_props_encode(const void *options, uint8_t *out)
+{
+ if (options == NULL)
+ return LZMA_PROG_ERROR;
+
+ const lzma_options_lzma *const opt = options;
+
+ if (lzma_lzma_lclppb_encode(opt, out))
+ return LZMA_PROG_ERROR;
+
+ write32le(out + 1, opt->dict_size);
+
+ return LZMA_OK;
+}
+#endif
+
+
+extern LZMA_API(lzma_bool)
+lzma_mode_is_supported(lzma_mode mode)
+{
+ return mode == LZMA_MODE_FAST || mode == LZMA_MODE_NORMAL;
+}
diff --git a/src/liblzma/lzma/lzma_encoder.h b/src/liblzma/lzma/lzma_encoder.h
new file mode 100644
index 0000000..84d8c91
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder.h
@@ -0,0 +1,59 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder.h
+/// \brief LZMA encoder API
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA_ENCODER_H
+#define LZMA_LZMA_ENCODER_H
+
+#include "common.h"
+
+
+typedef struct lzma_lzma1_encoder_s lzma_lzma1_encoder;
+
+
+extern lzma_ret lzma_lzma_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern uint64_t lzma_lzma_encoder_memusage(const void *options);
+
+extern lzma_ret lzma_lzma_props_encode(const void *options, uint8_t *out);
+
+
+/// Encodes lc/lp/pb into one byte. Returns false on success and true on error.
+extern bool lzma_lzma_lclppb_encode(
+ const lzma_options_lzma *options, uint8_t *byte);
+
+
+#ifdef LZMA_LZ_ENCODER_H
+
+/// Initializes raw LZMA encoder; this is used by LZMA2.
+extern lzma_ret lzma_lzma_encoder_create(
+ void **coder_ptr, const lzma_allocator *allocator,
+ lzma_vli id, const lzma_options_lzma *options,
+ lzma_lz_options *lz_options);
+
+
+/// Resets an already initialized LZMA encoder; this is used by LZMA2.
+extern lzma_ret lzma_lzma_encoder_reset(
+ lzma_lzma1_encoder *coder, const lzma_options_lzma *options);
+
+
+extern lzma_ret lzma_lzma_encode(lzma_lzma1_encoder *restrict coder,
+ lzma_mf *restrict mf, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size,
+ uint32_t read_limit);
+
+#endif
+
+#endif
diff --git a/src/liblzma/lzma/lzma_encoder_optimum_fast.c b/src/liblzma/lzma/lzma_encoder_optimum_fast.c
new file mode 100644
index 0000000..6c53d2b
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder_optimum_fast.c
@@ -0,0 +1,170 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder_optimum_fast.c
+//
+// Author: Igor Pavlov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma_encoder_private.h"
+#include "memcmplen.h"
+
+
+#define change_pair(small_dist, big_dist) \
+ (((big_dist) >> 7) > (small_dist))
+
+
+extern void
+lzma_lzma_optimum_fast(lzma_lzma1_encoder *restrict coder,
+ lzma_mf *restrict mf,
+ uint32_t *restrict back_res, uint32_t *restrict len_res)
+{
+ const uint32_t nice_len = mf->nice_len;
+
+ uint32_t len_main;
+ uint32_t matches_count;
+ if (mf->read_ahead == 0) {
+ len_main = mf_find(mf, &matches_count, coder->matches);
+ } else {
+ assert(mf->read_ahead == 1);
+ len_main = coder->longest_match_length;
+ matches_count = coder->matches_count;
+ }
+
+ const uint8_t *buf = mf_ptr(mf) - 1;
+ const uint32_t buf_avail = my_min(mf_avail(mf) + 1, MATCH_LEN_MAX);
+
+ if (buf_avail < 2) {
+ // There's not enough input left to encode a match.
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return;
+ }
+
+ // Look for repeated matches; scan the previous four match distances
+ uint32_t rep_len = 0;
+ uint32_t rep_index = 0;
+
+ for (uint32_t i = 0; i < REPS; ++i) {
+ // Pointer to the beginning of the match candidate
+ const uint8_t *const buf_back = buf - coder->reps[i] - 1;
+
+ // If the first two bytes (2 == MATCH_LEN_MIN) do not match,
+ // this rep is not useful.
+ if (not_equal_16(buf, buf_back))
+ continue;
+
+ // The first two bytes matched.
+ // Calculate the length of the match.
+ const uint32_t len = lzma_memcmplen(
+ buf, buf_back, 2, buf_avail);
+
+ // If we have found a repeated match that is at least
+ // nice_len long, return it immediately.
+ if (len >= nice_len) {
+ *back_res = i;
+ *len_res = len;
+ mf_skip(mf, len - 1);
+ return;
+ }
+
+ if (len > rep_len) {
+ rep_index = i;
+ rep_len = len;
+ }
+ }
+
+ // We didn't find a long enough repeated match. Encode it as a normal
+ // match if the match length is at least nice_len.
+ if (len_main >= nice_len) {
+ *back_res = coder->matches[matches_count - 1].dist + REPS;
+ *len_res = len_main;
+ mf_skip(mf, len_main - 1);
+ return;
+ }
+
+ uint32_t back_main = 0;
+ if (len_main >= 2) {
+ back_main = coder->matches[matches_count - 1].dist;
+
+ while (matches_count > 1 && len_main ==
+ coder->matches[matches_count - 2].len + 1) {
+ if (!change_pair(coder->matches[
+ matches_count - 2].dist,
+ back_main))
+ break;
+
+ --matches_count;
+ len_main = coder->matches[matches_count - 1].len;
+ back_main = coder->matches[matches_count - 1].dist;
+ }
+
+ if (len_main == 2 && back_main >= 0x80)
+ len_main = 1;
+ }
+
+ if (rep_len >= 2) {
+ if (rep_len + 1 >= len_main
+ || (rep_len + 2 >= len_main
+ && back_main > (UINT32_C(1) << 9))
+ || (rep_len + 3 >= len_main
+ && back_main > (UINT32_C(1) << 15))) {
+ *back_res = rep_index;
+ *len_res = rep_len;
+ mf_skip(mf, rep_len - 1);
+ return;
+ }
+ }
+
+ if (len_main < 2 || buf_avail <= 2) {
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return;
+ }
+
+ // Get the matches for the next byte. If we find a better match,
+ // the current byte is encoded as a literal.
+ coder->longest_match_length = mf_find(mf,
+ &coder->matches_count, coder->matches);
+
+ if (coder->longest_match_length >= 2) {
+ const uint32_t new_dist = coder->matches[
+ coder->matches_count - 1].dist;
+
+ if ((coder->longest_match_length >= len_main
+ && new_dist < back_main)
+ || (coder->longest_match_length == len_main + 1
+ && !change_pair(back_main, new_dist))
+ || (coder->longest_match_length > len_main + 1)
+ || (coder->longest_match_length + 1 >= len_main
+ && len_main >= 3
+ && change_pair(new_dist, back_main))) {
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return;
+ }
+ }
+
+ // In contrast to LZMA SDK, dictionary could not have been moved
+ // between mf_find() calls, thus it is safe to just increment
+ // the old buf pointer instead of recalculating it with mf_ptr().
+ ++buf;
+
+ const uint32_t limit = my_max(2, len_main - 1);
+
+ for (uint32_t i = 0; i < REPS; ++i) {
+ if (memcmp(buf, buf - coder->reps[i] - 1, limit) == 0) {
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return;
+ }
+ }
+
+ *back_res = back_main + REPS;
+ *len_res = len_main;
+ mf_skip(mf, len_main - 2);
+ return;
+}
diff --git a/src/liblzma/lzma/lzma_encoder_optimum_normal.c b/src/liblzma/lzma/lzma_encoder_optimum_normal.c
new file mode 100644
index 0000000..101c8d4
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder_optimum_normal.c
@@ -0,0 +1,859 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder_optimum_normal.c
+//
+// Author: Igor Pavlov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "lzma_encoder_private.h"
+#include "fastpos.h"
+#include "memcmplen.h"
+
+
+////////////
+// Prices //
+////////////
+
+static uint32_t
+get_literal_price(const lzma_lzma1_encoder *const coder, const uint32_t pos,
+ const uint32_t prev_byte, const bool match_mode,
+ uint32_t match_byte, uint32_t symbol)
+{
+ const probability *const subcoder = literal_subcoder(coder->literal,
+ coder->literal_context_bits, coder->literal_pos_mask,
+ pos, prev_byte);
+
+ uint32_t price = 0;
+
+ if (!match_mode) {
+ price = rc_bittree_price(subcoder, 8, symbol);
+ } else {
+ uint32_t offset = 0x100;
+ symbol += UINT32_C(1) << 8;
+
+ do {
+ match_byte <<= 1;
+
+ const uint32_t match_bit = match_byte & offset;
+ const uint32_t subcoder_index
+ = offset + match_bit + (symbol >> 8);
+ const uint32_t bit = (symbol >> 7) & 1;
+ price += rc_bit_price(subcoder[subcoder_index], bit);
+
+ symbol <<= 1;
+ offset &= ~(match_byte ^ symbol);
+
+ } while (symbol < (UINT32_C(1) << 16));
+ }
+
+ return price;
+}
+
+
+static inline uint32_t
+get_len_price(const lzma_length_encoder *const lencoder,
+ const uint32_t len, const uint32_t pos_state)
+{
+ // NOTE: Unlike the other price tables, length prices are updated
+ // in lzma_encoder.c
+ return lencoder->prices[pos_state][len - MATCH_LEN_MIN];
+}
+
+
+static inline uint32_t
+get_short_rep_price(const lzma_lzma1_encoder *const coder,
+ const lzma_lzma_state state, const uint32_t pos_state)
+{
+ return rc_bit_0_price(coder->is_rep0[state])
+ + rc_bit_0_price(coder->is_rep0_long[state][pos_state]);
+}
+
+
+static inline uint32_t
+get_pure_rep_price(const lzma_lzma1_encoder *const coder, const uint32_t rep_index,
+ const lzma_lzma_state state, uint32_t pos_state)
+{
+ uint32_t price;
+
+ if (rep_index == 0) {
+ price = rc_bit_0_price(coder->is_rep0[state]);
+ price += rc_bit_1_price(coder->is_rep0_long[state][pos_state]);
+ } else {
+ price = rc_bit_1_price(coder->is_rep0[state]);
+
+ if (rep_index == 1) {
+ price += rc_bit_0_price(coder->is_rep1[state]);
+ } else {
+ price += rc_bit_1_price(coder->is_rep1[state]);
+ price += rc_bit_price(coder->is_rep2[state],
+ rep_index - 2);
+ }
+ }
+
+ return price;
+}
+
+
+static inline uint32_t
+get_rep_price(const lzma_lzma1_encoder *const coder, const uint32_t rep_index,
+ const uint32_t len, const lzma_lzma_state state,
+ const uint32_t pos_state)
+{
+ return get_len_price(&coder->rep_len_encoder, len, pos_state)
+ + get_pure_rep_price(coder, rep_index, state, pos_state);
+}
+
+
+static inline uint32_t
+get_dist_len_price(const lzma_lzma1_encoder *const coder, const uint32_t dist,
+ const uint32_t len, const uint32_t pos_state)
+{
+ const uint32_t dist_state = get_dist_state(len);
+ uint32_t price;
+
+ if (dist < FULL_DISTANCES) {
+ price = coder->dist_prices[dist_state][dist];
+ } else {
+ const uint32_t dist_slot = get_dist_slot_2(dist);
+ price = coder->dist_slot_prices[dist_state][dist_slot]
+ + coder->align_prices[dist & ALIGN_MASK];
+ }
+
+ price += get_len_price(&coder->match_len_encoder, len, pos_state);
+
+ return price;
+}
+
+
+static void
+fill_dist_prices(lzma_lzma1_encoder *coder)
+{
+ for (uint32_t dist_state = 0; dist_state < DIST_STATES; ++dist_state) {
+
+ uint32_t *const dist_slot_prices
+ = coder->dist_slot_prices[dist_state];
+
+ // Price to encode the dist_slot.
+ for (uint32_t dist_slot = 0;
+ dist_slot < coder->dist_table_size; ++dist_slot)
+ dist_slot_prices[dist_slot] = rc_bittree_price(
+ coder->dist_slot[dist_state],
+ DIST_SLOT_BITS, dist_slot);
+
+ // For matches with distance >= FULL_DISTANCES, add the price
+ // of the direct bits part of the match distance. (Align bits
+ // are handled by fill_align_prices()).
+ for (uint32_t dist_slot = DIST_MODEL_END;
+ dist_slot < coder->dist_table_size;
+ ++dist_slot)
+ dist_slot_prices[dist_slot] += rc_direct_price(
+ ((dist_slot >> 1) - 1) - ALIGN_BITS);
+
+ // Distances in the range [0, 3] are fully encoded with
+ // dist_slot, so they are used for coder->dist_prices
+ // as is.
+ for (uint32_t i = 0; i < DIST_MODEL_START; ++i)
+ coder->dist_prices[dist_state][i]
+ = dist_slot_prices[i];
+ }
+
+ // Distances in the range [4, 127] depend on dist_slot and
+ // dist_special. We do this in a loop separate from the above
+ // loop to avoid redundant calls to get_dist_slot().
+ for (uint32_t i = DIST_MODEL_START; i < FULL_DISTANCES; ++i) {
+ const uint32_t dist_slot = get_dist_slot(i);
+ const uint32_t footer_bits = ((dist_slot >> 1) - 1);
+ const uint32_t base = (2 | (dist_slot & 1)) << footer_bits;
+ const uint32_t price = rc_bittree_reverse_price(
+ coder->dist_special + base - dist_slot - 1,
+ footer_bits, i - base);
+
+ for (uint32_t dist_state = 0; dist_state < DIST_STATES;
+ ++dist_state)
+ coder->dist_prices[dist_state][i]
+ = price + coder->dist_slot_prices[
+ dist_state][dist_slot];
+ }
+
+ coder->match_price_count = 0;
+ return;
+}
+
+
+static void
+fill_align_prices(lzma_lzma1_encoder *coder)
+{
+ for (uint32_t i = 0; i < ALIGN_SIZE; ++i)
+ coder->align_prices[i] = rc_bittree_reverse_price(
+ coder->dist_align, ALIGN_BITS, i);
+
+ coder->align_price_count = 0;
+ return;
+}
+
+
+/////////////
+// Optimal //
+/////////////
+
+static inline void
+make_literal(lzma_optimal *optimal)
+{
+ optimal->back_prev = UINT32_MAX;
+ optimal->prev_1_is_literal = false;
+}
+
+
+static inline void
+make_short_rep(lzma_optimal *optimal)
+{
+ optimal->back_prev = 0;
+ optimal->prev_1_is_literal = false;
+}
+
+
+#define is_short_rep(optimal) \
+ ((optimal).back_prev == 0)
+
+
+static void
+backward(lzma_lzma1_encoder *restrict coder, uint32_t *restrict len_res,
+ uint32_t *restrict back_res, uint32_t cur)
+{
+ coder->opts_end_index = cur;
+
+ uint32_t pos_mem = coder->opts[cur].pos_prev;
+ uint32_t back_mem = coder->opts[cur].back_prev;
+
+ do {
+ if (coder->opts[cur].prev_1_is_literal) {
+ make_literal(&coder->opts[pos_mem]);
+ coder->opts[pos_mem].pos_prev = pos_mem - 1;
+
+ if (coder->opts[cur].prev_2) {
+ coder->opts[pos_mem - 1].prev_1_is_literal
+ = false;
+ coder->opts[pos_mem - 1].pos_prev
+ = coder->opts[cur].pos_prev_2;
+ coder->opts[pos_mem - 1].back_prev
+ = coder->opts[cur].back_prev_2;
+ }
+ }
+
+ const uint32_t pos_prev = pos_mem;
+ const uint32_t back_cur = back_mem;
+
+ back_mem = coder->opts[pos_prev].back_prev;
+ pos_mem = coder->opts[pos_prev].pos_prev;
+
+ coder->opts[pos_prev].back_prev = back_cur;
+ coder->opts[pos_prev].pos_prev = cur;
+ cur = pos_prev;
+
+ } while (cur != 0);
+
+ coder->opts_current_index = coder->opts[0].pos_prev;
+ *len_res = coder->opts[0].pos_prev;
+ *back_res = coder->opts[0].back_prev;
+
+ return;
+}
+
+
+//////////
+// Main //
+//////////
+
+static inline uint32_t
+helper1(lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
+ uint32_t *restrict back_res, uint32_t *restrict len_res,
+ uint32_t position)
+{
+ const uint32_t nice_len = mf->nice_len;
+
+ uint32_t len_main;
+ uint32_t matches_count;
+
+ if (mf->read_ahead == 0) {
+ len_main = mf_find(mf, &matches_count, coder->matches);
+ } else {
+ assert(mf->read_ahead == 1);
+ len_main = coder->longest_match_length;
+ matches_count = coder->matches_count;
+ }
+
+ const uint32_t buf_avail = my_min(mf_avail(mf) + 1, MATCH_LEN_MAX);
+ if (buf_avail < 2) {
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return UINT32_MAX;
+ }
+
+ const uint8_t *const buf = mf_ptr(mf) - 1;
+
+ uint32_t rep_lens[REPS];
+ uint32_t rep_max_index = 0;
+
+ for (uint32_t i = 0; i < REPS; ++i) {
+ const uint8_t *const buf_back = buf - coder->reps[i] - 1;
+
+ if (not_equal_16(buf, buf_back)) {
+ rep_lens[i] = 0;
+ continue;
+ }
+
+ rep_lens[i] = lzma_memcmplen(buf, buf_back, 2, buf_avail);
+
+ if (rep_lens[i] > rep_lens[rep_max_index])
+ rep_max_index = i;
+ }
+
+ if (rep_lens[rep_max_index] >= nice_len) {
+ *back_res = rep_max_index;
+ *len_res = rep_lens[rep_max_index];
+ mf_skip(mf, *len_res - 1);
+ return UINT32_MAX;
+ }
+
+
+ if (len_main >= nice_len) {
+ *back_res = coder->matches[matches_count - 1].dist + REPS;
+ *len_res = len_main;
+ mf_skip(mf, len_main - 1);
+ return UINT32_MAX;
+ }
+
+ const uint8_t current_byte = *buf;
+ const uint8_t match_byte = *(buf - coder->reps[0] - 1);
+
+ if (len_main < 2 && current_byte != match_byte
+ && rep_lens[rep_max_index] < 2) {
+ *back_res = UINT32_MAX;
+ *len_res = 1;
+ return UINT32_MAX;
+ }
+
+ coder->opts[0].state = coder->state;
+
+ const uint32_t pos_state = position & coder->pos_mask;
+
+ coder->opts[1].price = rc_bit_0_price(
+ coder->is_match[coder->state][pos_state])
+ + get_literal_price(coder, position, buf[-1],
+ !is_literal_state(coder->state),
+ match_byte, current_byte);
+
+ make_literal(&coder->opts[1]);
+
+ const uint32_t match_price = rc_bit_1_price(
+ coder->is_match[coder->state][pos_state]);
+ const uint32_t rep_match_price = match_price
+ + rc_bit_1_price(coder->is_rep[coder->state]);
+
+ if (match_byte == current_byte) {
+ const uint32_t short_rep_price = rep_match_price
+ + get_short_rep_price(
+ coder, coder->state, pos_state);
+
+ if (short_rep_price < coder->opts[1].price) {
+ coder->opts[1].price = short_rep_price;
+ make_short_rep(&coder->opts[1]);
+ }
+ }
+
+ const uint32_t len_end = my_max(len_main, rep_lens[rep_max_index]);
+
+ if (len_end < 2) {
+ *back_res = coder->opts[1].back_prev;
+ *len_res = 1;
+ return UINT32_MAX;
+ }
+
+ coder->opts[1].pos_prev = 0;
+
+ for (uint32_t i = 0; i < REPS; ++i)
+ coder->opts[0].backs[i] = coder->reps[i];
+
+ uint32_t len = len_end;
+ do {
+ coder->opts[len].price = RC_INFINITY_PRICE;
+ } while (--len >= 2);
+
+
+ for (uint32_t i = 0; i < REPS; ++i) {
+ uint32_t rep_len = rep_lens[i];
+ if (rep_len < 2)
+ continue;
+
+ const uint32_t price = rep_match_price + get_pure_rep_price(
+ coder, i, coder->state, pos_state);
+
+ do {
+ const uint32_t cur_and_len_price = price
+ + get_len_price(
+ &coder->rep_len_encoder,
+ rep_len, pos_state);
+
+ if (cur_and_len_price < coder->opts[rep_len].price) {
+ coder->opts[rep_len].price = cur_and_len_price;
+ coder->opts[rep_len].pos_prev = 0;
+ coder->opts[rep_len].back_prev = i;
+ coder->opts[rep_len].prev_1_is_literal = false;
+ }
+ } while (--rep_len >= 2);
+ }
+
+
+ const uint32_t normal_match_price = match_price
+ + rc_bit_0_price(coder->is_rep[coder->state]);
+
+ len = rep_lens[0] >= 2 ? rep_lens[0] + 1 : 2;
+ if (len <= len_main) {
+ uint32_t i = 0;
+ while (len > coder->matches[i].len)
+ ++i;
+
+ for(; ; ++len) {
+ const uint32_t dist = coder->matches[i].dist;
+ const uint32_t cur_and_len_price = normal_match_price
+ + get_dist_len_price(coder,
+ dist, len, pos_state);
+
+ if (cur_and_len_price < coder->opts[len].price) {
+ coder->opts[len].price = cur_and_len_price;
+ coder->opts[len].pos_prev = 0;
+ coder->opts[len].back_prev = dist + REPS;
+ coder->opts[len].prev_1_is_literal = false;
+ }
+
+ if (len == coder->matches[i].len)
+ if (++i == matches_count)
+ break;
+ }
+ }
+
+ return len_end;
+}
+
+
+static inline uint32_t
+helper2(lzma_lzma1_encoder *coder, uint32_t *reps, const uint8_t *buf,
+ uint32_t len_end, uint32_t position, const uint32_t cur,
+ const uint32_t nice_len, const uint32_t buf_avail_full)
+{
+ uint32_t matches_count = coder->matches_count;
+ uint32_t new_len = coder->longest_match_length;
+ uint32_t pos_prev = coder->opts[cur].pos_prev;
+ lzma_lzma_state state;
+
+ if (coder->opts[cur].prev_1_is_literal) {
+ --pos_prev;
+
+ if (coder->opts[cur].prev_2) {
+ state = coder->opts[coder->opts[cur].pos_prev_2].state;
+
+ if (coder->opts[cur].back_prev_2 < REPS)
+ update_long_rep(state);
+ else
+ update_match(state);
+
+ } else {
+ state = coder->opts[pos_prev].state;
+ }
+
+ update_literal(state);
+
+ } else {
+ state = coder->opts[pos_prev].state;
+ }
+
+ if (pos_prev == cur - 1) {
+ if (is_short_rep(coder->opts[cur]))
+ update_short_rep(state);
+ else
+ update_literal(state);
+ } else {
+ uint32_t pos;
+ if (coder->opts[cur].prev_1_is_literal
+ && coder->opts[cur].prev_2) {
+ pos_prev = coder->opts[cur].pos_prev_2;
+ pos = coder->opts[cur].back_prev_2;
+ update_long_rep(state);
+ } else {
+ pos = coder->opts[cur].back_prev;
+ if (pos < REPS)
+ update_long_rep(state);
+ else
+ update_match(state);
+ }
+
+ if (pos < REPS) {
+ reps[0] = coder->opts[pos_prev].backs[pos];
+
+ uint32_t i;
+ for (i = 1; i <= pos; ++i)
+ reps[i] = coder->opts[pos_prev].backs[i - 1];
+
+ for (; i < REPS; ++i)
+ reps[i] = coder->opts[pos_prev].backs[i];
+
+ } else {
+ reps[0] = pos - REPS;
+
+ for (uint32_t i = 1; i < REPS; ++i)
+ reps[i] = coder->opts[pos_prev].backs[i - 1];
+ }
+ }
+
+ coder->opts[cur].state = state;
+
+ for (uint32_t i = 0; i < REPS; ++i)
+ coder->opts[cur].backs[i] = reps[i];
+
+ const uint32_t cur_price = coder->opts[cur].price;
+
+ const uint8_t current_byte = *buf;
+ const uint8_t match_byte = *(buf - reps[0] - 1);
+
+ const uint32_t pos_state = position & coder->pos_mask;
+
+ const uint32_t cur_and_1_price = cur_price
+ + rc_bit_0_price(coder->is_match[state][pos_state])
+ + get_literal_price(coder, position, buf[-1],
+ !is_literal_state(state), match_byte, current_byte);
+
+ bool next_is_literal = false;
+
+ if (cur_and_1_price < coder->opts[cur + 1].price) {
+ coder->opts[cur + 1].price = cur_and_1_price;
+ coder->opts[cur + 1].pos_prev = cur;
+ make_literal(&coder->opts[cur + 1]);
+ next_is_literal = true;
+ }
+
+ const uint32_t match_price = cur_price
+ + rc_bit_1_price(coder->is_match[state][pos_state]);
+ const uint32_t rep_match_price = match_price
+ + rc_bit_1_price(coder->is_rep[state]);
+
+ if (match_byte == current_byte
+ && !(coder->opts[cur + 1].pos_prev < cur
+ && coder->opts[cur + 1].back_prev == 0)) {
+
+ const uint32_t short_rep_price = rep_match_price
+ + get_short_rep_price(coder, state, pos_state);
+
+ if (short_rep_price <= coder->opts[cur + 1].price) {
+ coder->opts[cur + 1].price = short_rep_price;
+ coder->opts[cur + 1].pos_prev = cur;
+ make_short_rep(&coder->opts[cur + 1]);
+ next_is_literal = true;
+ }
+ }
+
+ if (buf_avail_full < 2)
+ return len_end;
+
+ const uint32_t buf_avail = my_min(buf_avail_full, nice_len);
+
+ if (!next_is_literal && match_byte != current_byte) { // speed optimization
+ // try literal + rep0
+ const uint8_t *const buf_back = buf - reps[0] - 1;
+ const uint32_t limit = my_min(buf_avail_full, nice_len + 1);
+
+ const uint32_t len_test = lzma_memcmplen(buf, buf_back, 1, limit) - 1;
+
+ if (len_test >= 2) {
+ lzma_lzma_state state_2 = state;
+ update_literal(state_2);
+
+ const uint32_t pos_state_next = (position + 1) & coder->pos_mask;
+ const uint32_t next_rep_match_price = cur_and_1_price
+ + rc_bit_1_price(coder->is_match[state_2][pos_state_next])
+ + rc_bit_1_price(coder->is_rep[state_2]);
+
+ //for (; len_test >= 2; --len_test) {
+ const uint32_t offset = cur + 1 + len_test;
+
+ while (len_end < offset)
+ coder->opts[++len_end].price = RC_INFINITY_PRICE;
+
+ const uint32_t cur_and_len_price = next_rep_match_price
+ + get_rep_price(coder, 0, len_test,
+ state_2, pos_state_next);
+
+ if (cur_and_len_price < coder->opts[offset].price) {
+ coder->opts[offset].price = cur_and_len_price;
+ coder->opts[offset].pos_prev = cur + 1;
+ coder->opts[offset].back_prev = 0;
+ coder->opts[offset].prev_1_is_literal = true;
+ coder->opts[offset].prev_2 = false;
+ }
+ //}
+ }
+ }
+
+
+ uint32_t start_len = 2; // speed optimization
+
+ for (uint32_t rep_index = 0; rep_index < REPS; ++rep_index) {
+ const uint8_t *const buf_back = buf - reps[rep_index] - 1;
+ if (not_equal_16(buf, buf_back))
+ continue;
+
+ uint32_t len_test = lzma_memcmplen(buf, buf_back, 2, buf_avail);
+
+ while (len_end < cur + len_test)
+ coder->opts[++len_end].price = RC_INFINITY_PRICE;
+
+ const uint32_t len_test_temp = len_test;
+ const uint32_t price = rep_match_price + get_pure_rep_price(
+ coder, rep_index, state, pos_state);
+
+ do {
+ const uint32_t cur_and_len_price = price
+ + get_len_price(&coder->rep_len_encoder,
+ len_test, pos_state);
+
+ if (cur_and_len_price < coder->opts[cur + len_test].price) {
+ coder->opts[cur + len_test].price = cur_and_len_price;
+ coder->opts[cur + len_test].pos_prev = cur;
+ coder->opts[cur + len_test].back_prev = rep_index;
+ coder->opts[cur + len_test].prev_1_is_literal = false;
+ }
+ } while (--len_test >= 2);
+
+ len_test = len_test_temp;
+
+ if (rep_index == 0)
+ start_len = len_test + 1;
+
+
+ uint32_t len_test_2 = len_test + 1;
+ const uint32_t limit = my_min(buf_avail_full,
+ len_test_2 + nice_len);
+ // NOTE: len_test_2 may be greater than limit so the call to
+ // lzma_memcmplen() must be done conditionally.
+ if (len_test_2 < limit)
+ len_test_2 = lzma_memcmplen(buf, buf_back, len_test_2, limit);
+
+ len_test_2 -= len_test + 1;
+
+ if (len_test_2 >= 2) {
+ lzma_lzma_state state_2 = state;
+ update_long_rep(state_2);
+
+ uint32_t pos_state_next = (position + len_test) & coder->pos_mask;
+
+ const uint32_t cur_and_len_literal_price = price
+ + get_len_price(&coder->rep_len_encoder,
+ len_test, pos_state)
+ + rc_bit_0_price(coder->is_match[state_2][pos_state_next])
+ + get_literal_price(coder, position + len_test,
+ buf[len_test - 1], true,
+ buf_back[len_test], buf[len_test]);
+
+ update_literal(state_2);
+
+ pos_state_next = (position + len_test + 1) & coder->pos_mask;
+
+ const uint32_t next_rep_match_price = cur_and_len_literal_price
+ + rc_bit_1_price(coder->is_match[state_2][pos_state_next])
+ + rc_bit_1_price(coder->is_rep[state_2]);
+
+ //for(; len_test_2 >= 2; len_test_2--) {
+ const uint32_t offset = cur + len_test + 1 + len_test_2;
+
+ while (len_end < offset)
+ coder->opts[++len_end].price = RC_INFINITY_PRICE;
+
+ const uint32_t cur_and_len_price = next_rep_match_price
+ + get_rep_price(coder, 0, len_test_2,
+ state_2, pos_state_next);
+
+ if (cur_and_len_price < coder->opts[offset].price) {
+ coder->opts[offset].price = cur_and_len_price;
+ coder->opts[offset].pos_prev = cur + len_test + 1;
+ coder->opts[offset].back_prev = 0;
+ coder->opts[offset].prev_1_is_literal = true;
+ coder->opts[offset].prev_2 = true;
+ coder->opts[offset].pos_prev_2 = cur;
+ coder->opts[offset].back_prev_2 = rep_index;
+ }
+ //}
+ }
+ }
+
+
+ //for (uint32_t len_test = 2; len_test <= new_len; ++len_test)
+ if (new_len > buf_avail) {
+ new_len = buf_avail;
+
+ matches_count = 0;
+ while (new_len > coder->matches[matches_count].len)
+ ++matches_count;
+
+ coder->matches[matches_count++].len = new_len;
+ }
+
+
+ if (new_len >= start_len) {
+ const uint32_t normal_match_price = match_price
+ + rc_bit_0_price(coder->is_rep[state]);
+
+ while (len_end < cur + new_len)
+ coder->opts[++len_end].price = RC_INFINITY_PRICE;
+
+ uint32_t i = 0;
+ while (start_len > coder->matches[i].len)
+ ++i;
+
+ for (uint32_t len_test = start_len; ; ++len_test) {
+ const uint32_t cur_back = coder->matches[i].dist;
+ uint32_t cur_and_len_price = normal_match_price
+ + get_dist_len_price(coder,
+ cur_back, len_test, pos_state);
+
+ if (cur_and_len_price < coder->opts[cur + len_test].price) {
+ coder->opts[cur + len_test].price = cur_and_len_price;
+ coder->opts[cur + len_test].pos_prev = cur;
+ coder->opts[cur + len_test].back_prev
+ = cur_back + REPS;
+ coder->opts[cur + len_test].prev_1_is_literal = false;
+ }
+
+ if (len_test == coder->matches[i].len) {
+ // Try Match + Literal + Rep0
+ const uint8_t *const buf_back = buf - cur_back - 1;
+ uint32_t len_test_2 = len_test + 1;
+ const uint32_t limit = my_min(buf_avail_full,
+ len_test_2 + nice_len);
+
+ // NOTE: len_test_2 may be greater than limit
+ // so the call to lzma_memcmplen() must be
+ // done conditionally.
+ if (len_test_2 < limit)
+ len_test_2 = lzma_memcmplen(buf, buf_back,
+ len_test_2, limit);
+
+ len_test_2 -= len_test + 1;
+
+ if (len_test_2 >= 2) {
+ lzma_lzma_state state_2 = state;
+ update_match(state_2);
+ uint32_t pos_state_next
+ = (position + len_test) & coder->pos_mask;
+
+ const uint32_t cur_and_len_literal_price = cur_and_len_price
+ + rc_bit_0_price(
+ coder->is_match[state_2][pos_state_next])
+ + get_literal_price(coder,
+ position + len_test,
+ buf[len_test - 1],
+ true,
+ buf_back[len_test],
+ buf[len_test]);
+
+ update_literal(state_2);
+ pos_state_next = (pos_state_next + 1) & coder->pos_mask;
+
+ const uint32_t next_rep_match_price
+ = cur_and_len_literal_price
+ + rc_bit_1_price(
+ coder->is_match[state_2][pos_state_next])
+ + rc_bit_1_price(coder->is_rep[state_2]);
+
+ // for(; len_test_2 >= 2; --len_test_2) {
+ const uint32_t offset = cur + len_test + 1 + len_test_2;
+
+ while (len_end < offset)
+ coder->opts[++len_end].price = RC_INFINITY_PRICE;
+
+ cur_and_len_price = next_rep_match_price
+ + get_rep_price(coder, 0, len_test_2,
+ state_2, pos_state_next);
+
+ if (cur_and_len_price < coder->opts[offset].price) {
+ coder->opts[offset].price = cur_and_len_price;
+ coder->opts[offset].pos_prev = cur + len_test + 1;
+ coder->opts[offset].back_prev = 0;
+ coder->opts[offset].prev_1_is_literal = true;
+ coder->opts[offset].prev_2 = true;
+ coder->opts[offset].pos_prev_2 = cur;
+ coder->opts[offset].back_prev_2
+ = cur_back + REPS;
+ }
+ //}
+ }
+
+ if (++i == matches_count)
+ break;
+ }
+ }
+ }
+
+ return len_end;
+}
+
+
+extern void
+lzma_lzma_optimum_normal(lzma_lzma1_encoder *restrict coder,
+ lzma_mf *restrict mf,
+ uint32_t *restrict back_res, uint32_t *restrict len_res,
+ uint32_t position)
+{
+ // If we have symbols pending, return the next pending symbol.
+ if (coder->opts_end_index != coder->opts_current_index) {
+ assert(mf->read_ahead > 0);
+ *len_res = coder->opts[coder->opts_current_index].pos_prev
+ - coder->opts_current_index;
+ *back_res = coder->opts[coder->opts_current_index].back_prev;
+ coder->opts_current_index = coder->opts[
+ coder->opts_current_index].pos_prev;
+ return;
+ }
+
+ // Update the price tables. In LZMA SDK <= 4.60 (and possibly later)
+ // this was done in both initialization function and in the main loop.
+ // In liblzma they were moved into this single place.
+ if (mf->read_ahead == 0) {
+ if (coder->match_price_count >= (1 << 7))
+ fill_dist_prices(coder);
+
+ if (coder->align_price_count >= ALIGN_SIZE)
+ fill_align_prices(coder);
+ }
+
+ // TODO: This needs quite a bit of cleaning still. But splitting
+ // the original function into two pieces makes it at least a little
+ // more readable, since those two parts don't share many variables.
+
+ uint32_t len_end = helper1(coder, mf, back_res, len_res, position);
+ if (len_end == UINT32_MAX)
+ return;
+
+ uint32_t reps[REPS];
+ memcpy(reps, coder->reps, sizeof(reps));
+
+ uint32_t cur;
+ for (cur = 1; cur < len_end; ++cur) {
+ assert(cur < OPTS);
+
+ coder->longest_match_length = mf_find(
+ mf, &coder->matches_count, coder->matches);
+
+ if (coder->longest_match_length >= mf->nice_len)
+ break;
+
+ len_end = helper2(coder, reps, mf_ptr(mf) - 1, len_end,
+ position + cur, cur, mf->nice_len,
+ my_min(mf_avail(mf) + 1, OPTS - 1 - cur));
+ }
+
+ backward(coder, len_res, back_res, cur);
+ return;
+}
diff --git a/src/liblzma/lzma/lzma_encoder_presets.c b/src/liblzma/lzma/lzma_encoder_presets.c
new file mode 100644
index 0000000..711df02
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder_presets.c
@@ -0,0 +1,64 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder_presets.c
+/// \brief Encoder presets
+/// \note xz needs this even when only decoding is enabled.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(lzma_bool)
+lzma_lzma_preset(lzma_options_lzma *options, uint32_t preset)
+{
+ const uint32_t level = preset & LZMA_PRESET_LEVEL_MASK;
+ const uint32_t flags = preset & ~LZMA_PRESET_LEVEL_MASK;
+ const uint32_t supported_flags = LZMA_PRESET_EXTREME;
+
+ if (level > 9 || (flags & ~supported_flags))
+ return true;
+
+ options->preset_dict = NULL;
+ options->preset_dict_size = 0;
+
+ options->lc = LZMA_LC_DEFAULT;
+ options->lp = LZMA_LP_DEFAULT;
+ options->pb = LZMA_PB_DEFAULT;
+
+ static const uint8_t dict_pow2[]
+ = { 18, 20, 21, 22, 22, 23, 23, 24, 25, 26 };
+ options->dict_size = UINT32_C(1) << dict_pow2[level];
+
+ if (level <= 3) {
+ options->mode = LZMA_MODE_FAST;
+ options->mf = level == 0 ? LZMA_MF_HC3 : LZMA_MF_HC4;
+ options->nice_len = level <= 1 ? 128 : 273;
+ static const uint8_t depths[] = { 4, 8, 24, 48 };
+ options->depth = depths[level];
+ } else {
+ options->mode = LZMA_MODE_NORMAL;
+ options->mf = LZMA_MF_BT4;
+ options->nice_len = level == 4 ? 16 : level == 5 ? 32 : 64;
+ options->depth = 0;
+ }
+
+ if (flags & LZMA_PRESET_EXTREME) {
+ options->mode = LZMA_MODE_NORMAL;
+ options->mf = LZMA_MF_BT4;
+ if (level == 3 || level == 5) {
+ options->nice_len = 192;
+ options->depth = 0;
+ } else {
+ options->nice_len = 273;
+ options->depth = 512;
+ }
+ }
+
+ return false;
+}
diff --git a/src/liblzma/lzma/lzma_encoder_private.h b/src/liblzma/lzma/lzma_encoder_private.h
new file mode 100644
index 0000000..b228c57
--- /dev/null
+++ b/src/liblzma/lzma/lzma_encoder_private.h
@@ -0,0 +1,162 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzma_encoder_private.h
+/// \brief Private definitions for LZMA encoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_LZMA_ENCODER_PRIVATE_H
+#define LZMA_LZMA_ENCODER_PRIVATE_H
+
+#include "lz_encoder.h"
+#include "range_encoder.h"
+#include "lzma_common.h"
+#include "lzma_encoder.h"
+
+
+// Macro to compare if the first two bytes in two buffers differ. This is
+// needed in lzma_lzma_optimum_*() to test if the match is at least
+// MATCH_LEN_MIN bytes. Unaligned access gives tiny gain so there's no
+// reason to not use it when it is supported.
+#ifdef TUKLIB_FAST_UNALIGNED_ACCESS
+# define not_equal_16(a, b) (read16ne(a) != read16ne(b))
+#else
+# define not_equal_16(a, b) \
+ ((a)[0] != (b)[0] || (a)[1] != (b)[1])
+#endif
+
+
+// Optimal - Number of entries in the optimum array.
+#define OPTS (1 << 12)
+
+
+typedef struct {
+ probability choice;
+ probability choice2;
+ probability low[POS_STATES_MAX][LEN_LOW_SYMBOLS];
+ probability mid[POS_STATES_MAX][LEN_MID_SYMBOLS];
+ probability high[LEN_HIGH_SYMBOLS];
+
+ uint32_t prices[POS_STATES_MAX][LEN_SYMBOLS];
+ uint32_t table_size;
+ uint32_t counters[POS_STATES_MAX];
+
+} lzma_length_encoder;
+
+
+typedef struct {
+ lzma_lzma_state state;
+
+ bool prev_1_is_literal;
+ bool prev_2;
+
+ uint32_t pos_prev_2;
+ uint32_t back_prev_2;
+
+ uint32_t price;
+ uint32_t pos_prev; // pos_next;
+ uint32_t back_prev;
+
+ uint32_t backs[REPS];
+
+} lzma_optimal;
+
+
+struct lzma_lzma1_encoder_s {
+ /// Range encoder
+ lzma_range_encoder rc;
+
+ /// Uncompressed size (doesn't include possible preset dictionary)
+ uint64_t uncomp_size;
+
+ /// If non-zero, produce at most this much output.
+ /// Some input may then be missing from the output.
+ uint64_t out_limit;
+
+ /// If the above out_limit is non-zero, *uncomp_size_ptr is set to
+ /// the amount of uncompressed data that we were able to fit
+ /// in the output buffer.
+ uint64_t *uncomp_size_ptr;
+
+ /// State
+ lzma_lzma_state state;
+
+ /// The four most recent match distances
+ uint32_t reps[REPS];
+
+ /// Array of match candidates
+ lzma_match matches[MATCH_LEN_MAX + 1];
+
+ /// Number of match candidates in matches[]
+ uint32_t matches_count;
+
+ /// Variable to hold the length of the longest match between calls
+ /// to lzma_lzma_optimum_*().
+ uint32_t longest_match_length;
+
+ /// True if using getoptimumfast
+ bool fast_mode;
+
+ /// True if the encoder has been initialized by encoding the first
+ /// byte as a literal.
+ bool is_initialized;
+
+ /// True if the range encoder has been flushed, but not all bytes
+ /// have been written to the output buffer yet.
+ bool is_flushed;
+
+ /// True if end of payload marker will be written.
+ bool use_eopm;
+
+ uint32_t pos_mask; ///< (1 << pos_bits) - 1
+ uint32_t literal_context_bits;
+ uint32_t literal_pos_mask;
+
+ // These are the same as in lzma_decoder.c. See comments there.
+ probability literal[LITERAL_CODERS_MAX][LITERAL_CODER_SIZE];
+ probability is_match[STATES][POS_STATES_MAX];
+ probability is_rep[STATES];
+ probability is_rep0[STATES];
+ probability is_rep1[STATES];
+ probability is_rep2[STATES];
+ probability is_rep0_long[STATES][POS_STATES_MAX];
+ probability dist_slot[DIST_STATES][DIST_SLOTS];
+ probability dist_special[FULL_DISTANCES - DIST_MODEL_END];
+ probability dist_align[ALIGN_SIZE];
+
+ // These are the same as in lzma_decoder.c except that the encoders
+ // include also price tables.
+ lzma_length_encoder match_len_encoder;
+ lzma_length_encoder rep_len_encoder;
+
+ // Price tables
+ uint32_t dist_slot_prices[DIST_STATES][DIST_SLOTS];
+ uint32_t dist_prices[DIST_STATES][FULL_DISTANCES];
+ uint32_t dist_table_size;
+ uint32_t match_price_count;
+
+ uint32_t align_prices[ALIGN_SIZE];
+ uint32_t align_price_count;
+
+ // Optimal
+ uint32_t opts_end_index;
+ uint32_t opts_current_index;
+ lzma_optimal opts[OPTS];
+};
+
+
+extern void lzma_lzma_optimum_fast(
+ lzma_lzma1_encoder *restrict coder, lzma_mf *restrict mf,
+ uint32_t *restrict back_res, uint32_t *restrict len_res);
+
+extern void lzma_lzma_optimum_normal(lzma_lzma1_encoder *restrict coder,
+ lzma_mf *restrict mf, uint32_t *restrict back_res,
+ uint32_t *restrict len_res, uint32_t position);
+
+#endif
diff --git a/src/liblzma/rangecoder/Makefile.inc b/src/liblzma/rangecoder/Makefile.inc
new file mode 100644
index 0000000..d8a597a
--- /dev/null
+++ b/src/liblzma/rangecoder/Makefile.inc
@@ -0,0 +1,21 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+EXTRA_DIST += rangecoder/price_tablegen.c
+
+liblzma_la_SOURCES += rangecoder/range_common.h
+
+if COND_ENCODER_LZMA1
+liblzma_la_SOURCES += \
+ rangecoder/range_encoder.h \
+ rangecoder/price.h \
+ rangecoder/price_table.c
+endif
+
+if COND_DECODER_LZMA1
+liblzma_la_SOURCES += rangecoder/range_decoder.h
+endif
diff --git a/src/liblzma/rangecoder/price.h b/src/liblzma/rangecoder/price.h
new file mode 100644
index 0000000..45dbbbb
--- /dev/null
+++ b/src/liblzma/rangecoder/price.h
@@ -0,0 +1,93 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file price.h
+/// \brief Probability price calculation
+//
+// Author: Igor Pavlov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_PRICE_H
+#define LZMA_PRICE_H
+
+
+#define RC_MOVE_REDUCING_BITS 4
+#define RC_BIT_PRICE_SHIFT_BITS 4
+#define RC_PRICE_TABLE_SIZE (RC_BIT_MODEL_TOTAL >> RC_MOVE_REDUCING_BITS)
+
+#define RC_INFINITY_PRICE (UINT32_C(1) << 30)
+
+
+/// Lookup table for the inline functions defined in this file.
+lzma_attr_visibility_hidden
+extern const uint8_t lzma_rc_prices[RC_PRICE_TABLE_SIZE];
+
+
+static inline uint32_t
+rc_bit_price(const probability prob, const uint32_t bit)
+{
+ return lzma_rc_prices[(prob ^ ((UINT32_C(0) - bit)
+ & (RC_BIT_MODEL_TOTAL - 1))) >> RC_MOVE_REDUCING_BITS];
+}
+
+
+static inline uint32_t
+rc_bit_0_price(const probability prob)
+{
+ return lzma_rc_prices[prob >> RC_MOVE_REDUCING_BITS];
+}
+
+
+static inline uint32_t
+rc_bit_1_price(const probability prob)
+{
+ return lzma_rc_prices[(prob ^ (RC_BIT_MODEL_TOTAL - 1))
+ >> RC_MOVE_REDUCING_BITS];
+}
+
+
+static inline uint32_t
+rc_bittree_price(const probability *const probs,
+ const uint32_t bit_levels, uint32_t symbol)
+{
+ uint32_t price = 0;
+ symbol += UINT32_C(1) << bit_levels;
+
+ do {
+ const uint32_t bit = symbol & 1;
+ symbol >>= 1;
+ price += rc_bit_price(probs[symbol], bit);
+ } while (symbol != 1);
+
+ return price;
+}
+
+
+static inline uint32_t
+rc_bittree_reverse_price(const probability *const probs,
+ uint32_t bit_levels, uint32_t symbol)
+{
+ uint32_t price = 0;
+ uint32_t model_index = 1;
+
+ do {
+ const uint32_t bit = symbol & 1;
+ symbol >>= 1;
+ price += rc_bit_price(probs[model_index], bit);
+ model_index = (model_index << 1) + bit;
+ } while (--bit_levels != 0);
+
+ return price;
+}
+
+
+static inline uint32_t
+rc_direct_price(const uint32_t bits)
+{
+ return bits << RC_BIT_PRICE_SHIFT_BITS;
+}
+
+#endif
diff --git a/src/liblzma/rangecoder/price_table.c b/src/liblzma/rangecoder/price_table.c
new file mode 100644
index 0000000..ac64bf6
--- /dev/null
+++ b/src/liblzma/rangecoder/price_table.c
@@ -0,0 +1,22 @@
+/* This file has been automatically generated by price_tablegen.c. */
+
+#include "range_encoder.h"
+
+const uint8_t lzma_rc_prices[RC_PRICE_TABLE_SIZE] = {
+ 128, 103, 91, 84, 78, 73, 69, 66,
+ 63, 61, 58, 56, 54, 52, 51, 49,
+ 48, 46, 45, 44, 43, 42, 41, 40,
+ 39, 38, 37, 36, 35, 34, 34, 33,
+ 32, 31, 31, 30, 29, 29, 28, 28,
+ 27, 26, 26, 25, 25, 24, 24, 23,
+ 23, 22, 22, 22, 21, 21, 20, 20,
+ 19, 19, 19, 18, 18, 17, 17, 17,
+ 16, 16, 16, 15, 15, 15, 14, 14,
+ 14, 13, 13, 13, 12, 12, 12, 11,
+ 11, 11, 11, 10, 10, 10, 10, 9,
+ 9, 9, 9, 8, 8, 8, 8, 7,
+ 7, 7, 7, 6, 6, 6, 6, 5,
+ 5, 5, 5, 5, 4, 4, 4, 4,
+ 3, 3, 3, 3, 3, 2, 2, 2,
+ 2, 2, 2, 1, 1, 1, 1, 1
+};
diff --git a/src/liblzma/rangecoder/price_tablegen.c b/src/liblzma/rangecoder/price_tablegen.c
new file mode 100644
index 0000000..bf08ce3
--- /dev/null
+++ b/src/liblzma/rangecoder/price_tablegen.c
@@ -0,0 +1,87 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file price_tablegen.c
+/// \brief Probability price table generator
+///
+/// Compiling: gcc -std=c99 -o price_tablegen price_tablegen.c
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <inttypes.h>
+#include <stdio.h>
+#include "range_common.h"
+#include "price.h"
+
+
+static uint32_t rc_prices[RC_PRICE_TABLE_SIZE];
+
+
+static void
+init_price_table(void)
+{
+ for (uint32_t i = (UINT32_C(1) << RC_MOVE_REDUCING_BITS) / 2;
+ i < RC_BIT_MODEL_TOTAL;
+ i += (UINT32_C(1) << RC_MOVE_REDUCING_BITS)) {
+ const uint32_t cycles_bits = RC_BIT_PRICE_SHIFT_BITS;
+ uint32_t w = i;
+ uint32_t bit_count = 0;
+
+ for (uint32_t j = 0; j < cycles_bits; ++j) {
+ w *= w;
+ bit_count <<= 1;
+
+ while (w >= (UINT32_C(1) << 16)) {
+ w >>= 1;
+ ++bit_count;
+ }
+ }
+
+ rc_prices[i >> RC_MOVE_REDUCING_BITS]
+ = (RC_BIT_MODEL_TOTAL_BITS << cycles_bits)
+ - 15 - bit_count;
+ }
+
+ return;
+}
+
+
+static void
+print_price_table(void)
+{
+ printf("/* This file has been automatically generated by "
+ "price_tablegen.c. */\n\n"
+ "#include \"range_encoder.h\"\n\n"
+ "const uint8_t lzma_rc_prices["
+ "RC_PRICE_TABLE_SIZE] = {");
+
+ const size_t array_size = sizeof(lzma_rc_prices)
+ / sizeof(lzma_rc_prices[0]);
+ for (size_t i = 0; i < array_size; ++i) {
+ if (i % 8 == 0)
+ printf("\n\t");
+
+ printf("%4" PRIu32, rc_prices[i]);
+
+ if (i != array_size - 1)
+ printf(",");
+ }
+
+ printf("\n};\n");
+
+ return;
+}
+
+
+int
+main(void)
+{
+ init_price_table();
+ print_price_table();
+ return 0;
+}
diff --git a/src/liblzma/rangecoder/range_common.h b/src/liblzma/rangecoder/range_common.h
new file mode 100644
index 0000000..2c74dc1
--- /dev/null
+++ b/src/liblzma/rangecoder/range_common.h
@@ -0,0 +1,71 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file range_common.h
+/// \brief Common things for range encoder and decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_RANGE_COMMON_H
+#define LZMA_RANGE_COMMON_H
+
+#include "common.h"
+
+
+///////////////
+// Constants //
+///////////////
+
+#define RC_SHIFT_BITS 8
+#define RC_TOP_BITS 24
+#define RC_TOP_VALUE (UINT32_C(1) << RC_TOP_BITS)
+#define RC_BIT_MODEL_TOTAL_BITS 11
+#define RC_BIT_MODEL_TOTAL (UINT32_C(1) << RC_BIT_MODEL_TOTAL_BITS)
+#define RC_MOVE_BITS 5
+
+
+////////////
+// Macros //
+////////////
+
+// Resets the probability so that both 0 and 1 have probability of 50 %
+#define bit_reset(prob) \
+ prob = RC_BIT_MODEL_TOTAL >> 1
+
+// This does the same for a complete bit tree.
+// (A tree represented as an array.)
+#define bittree_reset(probs, bit_levels) \
+ for (uint32_t bt_i = 0; bt_i < (1 << (bit_levels)); ++bt_i) \
+ bit_reset((probs)[bt_i])
+
+
+//////////////////////
+// Type definitions //
+//////////////////////
+
+/// \brief Type of probabilities used with range coder
+///
+/// This needs to be at least 12-bit integer, so uint16_t is a logical choice.
+/// However, on some architecture and compiler combinations, a bigger type
+/// may give better speed, because the probability variables are accessed
+/// a lot. On the other hand, bigger probability type increases cache
+/// footprint, since there are 2 to 14 thousand probability variables in
+/// LZMA (assuming the limit of lc + lp <= 4; with lc + lp <= 12 there
+/// would be about 1.5 million variables).
+///
+/// With malicious files, the initialization speed of the LZMA decoder can
+/// become important. In that case, smaller probability variables mean that
+/// there is less bytes to write to RAM, which makes initialization faster.
+/// With big probability type, the initialization can become so slow that it
+/// can be a problem e.g. for email servers doing virus scanning.
+///
+/// I will be sticking to uint16_t unless some specific architectures
+/// are *much* faster (20-50 %) with uint32_t.
+typedef uint16_t probability;
+
+#endif
diff --git a/src/liblzma/rangecoder/range_decoder.h b/src/liblzma/rangecoder/range_decoder.h
new file mode 100644
index 0000000..e0b051f
--- /dev/null
+++ b/src/liblzma/rangecoder/range_decoder.h
@@ -0,0 +1,185 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file range_decoder.h
+/// \brief Range Decoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_RANGE_DECODER_H
+#define LZMA_RANGE_DECODER_H
+
+#include "range_common.h"
+
+
+typedef struct {
+ uint32_t range;
+ uint32_t code;
+ uint32_t init_bytes_left;
+} lzma_range_decoder;
+
+
+/// Reads the first five bytes to initialize the range decoder.
+static inline lzma_ret
+rc_read_init(lzma_range_decoder *rc, const uint8_t *restrict in,
+ size_t *restrict in_pos, size_t in_size)
+{
+ while (rc->init_bytes_left > 0) {
+ if (*in_pos == in_size)
+ return LZMA_OK;
+
+ // The first byte is always 0x00. It could have been omitted
+ // in LZMA2 but it wasn't, so one byte is wasted in every
+ // LZMA2 chunk.
+ if (rc->init_bytes_left == 5 && in[*in_pos] != 0x00)
+ return LZMA_DATA_ERROR;
+
+ rc->code = (rc->code << 8) | in[*in_pos];
+ ++*in_pos;
+ --rc->init_bytes_left;
+ }
+
+ return LZMA_STREAM_END;
+}
+
+
+/// Makes local copies of range decoder and *in_pos variables. Doing this
+/// improves speed significantly. The range decoder macros expect also
+/// variables `in' and `in_size' to be defined.
+#define rc_to_local(range_decoder, in_pos) \
+ lzma_range_decoder rc = range_decoder; \
+ size_t rc_in_pos = (in_pos); \
+ uint32_t rc_bound
+
+
+/// Stores the local copes back to the range decoder structure.
+#define rc_from_local(range_decoder, in_pos) \
+do { \
+ range_decoder = rc; \
+ in_pos = rc_in_pos; \
+} while (0)
+
+
+/// Resets the range decoder structure.
+#define rc_reset(range_decoder) \
+do { \
+ (range_decoder).range = UINT32_MAX; \
+ (range_decoder).code = 0; \
+ (range_decoder).init_bytes_left = 5; \
+} while (0)
+
+
+/// When decoding has been properly finished, rc.code is always zero unless
+/// the input stream is corrupt. So checking this can catch some corrupt
+/// files especially if they don't have any other integrity check.
+#define rc_is_finished(range_decoder) \
+ ((range_decoder).code == 0)
+
+
+/// Read the next input byte if needed. If more input is needed but there is
+/// no more input available, "goto out" is used to jump out of the main
+/// decoder loop.
+#define rc_normalize(seq) \
+do { \
+ if (rc.range < RC_TOP_VALUE) { \
+ if (unlikely(rc_in_pos == in_size)) { \
+ coder->sequence = seq; \
+ goto out; \
+ } \
+ rc.range <<= RC_SHIFT_BITS; \
+ rc.code = (rc.code << RC_SHIFT_BITS) | in[rc_in_pos++]; \
+ } \
+} while (0)
+
+
+/// Start decoding a bit. This must be used together with rc_update_0()
+/// and rc_update_1():
+///
+/// rc_if_0(prob, seq) {
+/// rc_update_0(prob);
+/// // Do something
+/// } else {
+/// rc_update_1(prob);
+/// // Do something else
+/// }
+///
+#define rc_if_0(prob, seq) \
+ rc_normalize(seq); \
+ rc_bound = (rc.range >> RC_BIT_MODEL_TOTAL_BITS) * (prob); \
+ if (rc.code < rc_bound)
+
+
+/// Update the range decoder state and the used probability variable to
+/// match a decoded bit of 0.
+#define rc_update_0(prob) \
+do { \
+ rc.range = rc_bound; \
+ prob += (RC_BIT_MODEL_TOTAL - (prob)) >> RC_MOVE_BITS; \
+} while (0)
+
+
+/// Update the range decoder state and the used probability variable to
+/// match a decoded bit of 1.
+#define rc_update_1(prob) \
+do { \
+ rc.range -= rc_bound; \
+ rc.code -= rc_bound; \
+ prob -= (prob) >> RC_MOVE_BITS; \
+} while (0)
+
+
+/// Decodes one bit and runs action0 or action1 depending on the decoded bit.
+/// This macro is used as the last step in bittree reverse decoders since
+/// those don't use "symbol" for anything else than indexing the probability
+/// arrays.
+#define rc_bit_last(prob, action0, action1, seq) \
+do { \
+ rc_if_0(prob, seq) { \
+ rc_update_0(prob); \
+ action0; \
+ } else { \
+ rc_update_1(prob); \
+ action1; \
+ } \
+} while (0)
+
+
+/// Decodes one bit, updates "symbol", and runs action0 or action1 depending
+/// on the decoded bit.
+#define rc_bit(prob, action0, action1, seq) \
+ rc_bit_last(prob, \
+ symbol <<= 1; action0, \
+ symbol = (symbol << 1) + 1; action1, \
+ seq);
+
+
+/// Like rc_bit() but add "case seq:" as a prefix. This makes the unrolled
+/// loops more readable because the code isn't littered with "case"
+/// statements. On the other hand this also makes it less readable, since
+/// spotting the places where the decoder loop may be restarted is less
+/// obvious.
+#define rc_bit_case(prob, action0, action1, seq) \
+ case seq: rc_bit(prob, action0, action1, seq)
+
+
+/// Decode a bit without using a probability.
+#define rc_direct(dest, seq) \
+do { \
+ rc_normalize(seq); \
+ rc.range >>= 1; \
+ rc.code -= rc.range; \
+ rc_bound = UINT32_C(0) - (rc.code >> 31); \
+ rc.code += rc.range & rc_bound; \
+ dest = (dest << 1) + (rc_bound + 1); \
+} while (0)
+
+
+// NOTE: No macros are provided for bittree decoding. It seems to be simpler
+// to just write them open in the code.
+
+#endif
diff --git a/src/liblzma/rangecoder/range_encoder.h b/src/liblzma/rangecoder/range_encoder.h
new file mode 100644
index 0000000..d794eab
--- /dev/null
+++ b/src/liblzma/rangecoder/range_encoder.h
@@ -0,0 +1,350 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file range_encoder.h
+/// \brief Range Encoder
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_RANGE_ENCODER_H
+#define LZMA_RANGE_ENCODER_H
+
+#include "range_common.h"
+#include "price.h"
+
+
+/// Maximum number of symbols that can be put pending into lzma_range_encoder
+/// structure between calls to lzma_rc_encode(). For LZMA, 48+5 is enough
+/// (match with big distance and length followed by range encoder flush).
+#define RC_SYMBOLS_MAX 53
+
+
+typedef struct {
+ uint64_t low;
+ uint64_t cache_size;
+ uint32_t range;
+ uint8_t cache;
+
+ /// Number of bytes written out by rc_encode() -> rc_shift_low()
+ uint64_t out_total;
+
+ /// Number of symbols in the tables
+ size_t count;
+
+ /// rc_encode()'s position in the tables
+ size_t pos;
+
+ /// Symbols to encode
+ enum {
+ RC_BIT_0,
+ RC_BIT_1,
+ RC_DIRECT_0,
+ RC_DIRECT_1,
+ RC_FLUSH,
+ } symbols[RC_SYMBOLS_MAX];
+
+ /// Probabilities associated with RC_BIT_0 or RC_BIT_1
+ probability *probs[RC_SYMBOLS_MAX];
+
+} lzma_range_encoder;
+
+
+static inline void
+rc_reset(lzma_range_encoder *rc)
+{
+ rc->low = 0;
+ rc->cache_size = 1;
+ rc->range = UINT32_MAX;
+ rc->cache = 0;
+ rc->out_total = 0;
+ rc->count = 0;
+ rc->pos = 0;
+}
+
+
+static inline void
+rc_forget(lzma_range_encoder *rc)
+{
+ // This must not be called when rc_encode() is partially done.
+ assert(rc->pos == 0);
+ rc->count = 0;
+}
+
+
+static inline void
+rc_bit(lzma_range_encoder *rc, probability *prob, uint32_t bit)
+{
+ rc->symbols[rc->count] = bit;
+ rc->probs[rc->count] = prob;
+ ++rc->count;
+}
+
+
+static inline void
+rc_bittree(lzma_range_encoder *rc, probability *probs,
+ uint32_t bit_count, uint32_t symbol)
+{
+ uint32_t model_index = 1;
+
+ do {
+ const uint32_t bit = (symbol >> --bit_count) & 1;
+ rc_bit(rc, &probs[model_index], bit);
+ model_index = (model_index << 1) + bit;
+ } while (bit_count != 0);
+}
+
+
+static inline void
+rc_bittree_reverse(lzma_range_encoder *rc, probability *probs,
+ uint32_t bit_count, uint32_t symbol)
+{
+ uint32_t model_index = 1;
+
+ do {
+ const uint32_t bit = symbol & 1;
+ symbol >>= 1;
+ rc_bit(rc, &probs[model_index], bit);
+ model_index = (model_index << 1) + bit;
+ } while (--bit_count != 0);
+}
+
+
+static inline void
+rc_direct(lzma_range_encoder *rc,
+ uint32_t value, uint32_t bit_count)
+{
+ do {
+ rc->symbols[rc->count++]
+ = RC_DIRECT_0 + ((value >> --bit_count) & 1);
+ } while (bit_count != 0);
+}
+
+
+static inline void
+rc_flush(lzma_range_encoder *rc)
+{
+ for (size_t i = 0; i < 5; ++i)
+ rc->symbols[rc->count++] = RC_FLUSH;
+}
+
+
+static inline bool
+rc_shift_low(lzma_range_encoder *rc,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ if ((uint32_t)(rc->low) < (uint32_t)(0xFF000000)
+ || (uint32_t)(rc->low >> 32) != 0) {
+ do {
+ if (*out_pos == out_size)
+ return true;
+
+ out[*out_pos] = rc->cache + (uint8_t)(rc->low >> 32);
+ ++*out_pos;
+ ++rc->out_total;
+ rc->cache = 0xFF;
+
+ } while (--rc->cache_size != 0);
+
+ rc->cache = (rc->low >> 24) & 0xFF;
+ }
+
+ ++rc->cache_size;
+ rc->low = (rc->low & 0x00FFFFFF) << RC_SHIFT_BITS;
+
+ return false;
+}
+
+
+// NOTE: The last two arguments are uint64_t instead of size_t because in
+// the dummy version these refer to the size of the whole range-encoded
+// output stream, not just to the currently available output buffer space.
+static inline bool
+rc_shift_low_dummy(uint64_t *low, uint64_t *cache_size, uint8_t *cache,
+ uint64_t *out_pos, uint64_t out_size)
+{
+ if ((uint32_t)(*low) < (uint32_t)(0xFF000000)
+ || (uint32_t)(*low >> 32) != 0) {
+ do {
+ if (*out_pos == out_size)
+ return true;
+
+ ++*out_pos;
+ *cache = 0xFF;
+
+ } while (--*cache_size != 0);
+
+ *cache = (*low >> 24) & 0xFF;
+ }
+
+ ++*cache_size;
+ *low = (*low & 0x00FFFFFF) << RC_SHIFT_BITS;
+
+ return false;
+}
+
+
+static inline bool
+rc_encode(lzma_range_encoder *rc,
+ uint8_t *out, size_t *out_pos, size_t out_size)
+{
+ assert(rc->count <= RC_SYMBOLS_MAX);
+
+ while (rc->pos < rc->count) {
+ // Normalize
+ if (rc->range < RC_TOP_VALUE) {
+ if (rc_shift_low(rc, out, out_pos, out_size))
+ return true;
+
+ rc->range <<= RC_SHIFT_BITS;
+ }
+
+ // Encode a bit
+ switch (rc->symbols[rc->pos]) {
+ case RC_BIT_0: {
+ probability prob = *rc->probs[rc->pos];
+ rc->range = (rc->range >> RC_BIT_MODEL_TOTAL_BITS)
+ * prob;
+ prob += (RC_BIT_MODEL_TOTAL - prob) >> RC_MOVE_BITS;
+ *rc->probs[rc->pos] = prob;
+ break;
+ }
+
+ case RC_BIT_1: {
+ probability prob = *rc->probs[rc->pos];
+ const uint32_t bound = prob * (rc->range
+ >> RC_BIT_MODEL_TOTAL_BITS);
+ rc->low += bound;
+ rc->range -= bound;
+ prob -= prob >> RC_MOVE_BITS;
+ *rc->probs[rc->pos] = prob;
+ break;
+ }
+
+ case RC_DIRECT_0:
+ rc->range >>= 1;
+ break;
+
+ case RC_DIRECT_1:
+ rc->range >>= 1;
+ rc->low += rc->range;
+ break;
+
+ case RC_FLUSH:
+ // Prevent further normalizations.
+ rc->range = UINT32_MAX;
+
+ // Flush the last five bytes (see rc_flush()).
+ do {
+ if (rc_shift_low(rc, out, out_pos, out_size))
+ return true;
+ } while (++rc->pos < rc->count);
+
+ // Reset the range encoder so we are ready to continue
+ // encoding if we weren't finishing the stream.
+ rc_reset(rc);
+ return false;
+
+ default:
+ assert(0);
+ break;
+ }
+
+ ++rc->pos;
+ }
+
+ rc->count = 0;
+ rc->pos = 0;
+
+ return false;
+}
+
+
+static inline bool
+rc_encode_dummy(const lzma_range_encoder *rc, uint64_t out_limit)
+{
+ assert(rc->count <= RC_SYMBOLS_MAX);
+
+ uint64_t low = rc->low;
+ uint64_t cache_size = rc->cache_size;
+ uint32_t range = rc->range;
+ uint8_t cache = rc->cache;
+ uint64_t out_pos = rc->out_total;
+
+ size_t pos = rc->pos;
+
+ while (true) {
+ // Normalize
+ if (range < RC_TOP_VALUE) {
+ if (rc_shift_low_dummy(&low, &cache_size, &cache,
+ &out_pos, out_limit))
+ return true;
+
+ range <<= RC_SHIFT_BITS;
+ }
+
+ // This check is here because the normalization above must
+ // be done before flushing the last bytes.
+ if (pos == rc->count)
+ break;
+
+ // Encode a bit
+ switch (rc->symbols[pos]) {
+ case RC_BIT_0: {
+ probability prob = *rc->probs[pos];
+ range = (range >> RC_BIT_MODEL_TOTAL_BITS)
+ * prob;
+ break;
+ }
+
+ case RC_BIT_1: {
+ probability prob = *rc->probs[pos];
+ const uint32_t bound = prob * (range
+ >> RC_BIT_MODEL_TOTAL_BITS);
+ low += bound;
+ range -= bound;
+ break;
+ }
+
+ case RC_DIRECT_0:
+ range >>= 1;
+ break;
+
+ case RC_DIRECT_1:
+ range >>= 1;
+ low += range;
+ break;
+
+ case RC_FLUSH:
+ default:
+ assert(0);
+ break;
+ }
+
+ ++pos;
+ }
+
+ // Flush the last bytes. This isn't in rc->symbols[] so we do
+ // it after the above loop to take into account the size of
+ // the flushing that will be done at the end of the stream.
+ for (pos = 0; pos < 5; ++pos) {
+ if (rc_shift_low_dummy(&low, &cache_size,
+ &cache, &out_pos, out_limit))
+ return true;
+ }
+
+ return false;
+}
+
+
+static inline uint64_t
+rc_pending(const lzma_range_encoder *rc)
+{
+ return rc->cache_size + 5 - 1;
+}
+
+#endif
diff --git a/src/liblzma/simple/Makefile.inc b/src/liblzma/simple/Makefile.inc
new file mode 100644
index 0000000..dc092f9
--- /dev/null
+++ b/src/liblzma/simple/Makefile.inc
@@ -0,0 +1,51 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+liblzma_la_SOURCES += \
+ simple/simple_coder.c \
+ simple/simple_coder.h \
+ simple/simple_private.h
+
+if COND_ENCODER_SIMPLE
+liblzma_la_SOURCES += \
+ simple/simple_encoder.c \
+ simple/simple_encoder.h
+endif
+
+if COND_DECODER_SIMPLE
+liblzma_la_SOURCES += \
+ simple/simple_decoder.c \
+ simple/simple_decoder.h
+endif
+
+if COND_FILTER_X86
+liblzma_la_SOURCES += simple/x86.c
+endif
+
+if COND_FILTER_POWERPC
+liblzma_la_SOURCES += simple/powerpc.c
+endif
+
+if COND_FILTER_IA64
+liblzma_la_SOURCES += simple/ia64.c
+endif
+
+if COND_FILTER_ARM
+liblzma_la_SOURCES += simple/arm.c
+endif
+
+if COND_FILTER_ARMTHUMB
+liblzma_la_SOURCES += simple/armthumb.c
+endif
+
+if COND_FILTER_ARM64
+liblzma_la_SOURCES += simple/arm64.c
+endif
+
+if COND_FILTER_SPARC
+liblzma_la_SOURCES += simple/sparc.c
+endif
diff --git a/src/liblzma/simple/arm.c b/src/liblzma/simple/arm.c
new file mode 100644
index 0000000..6e53970
--- /dev/null
+++ b/src/liblzma/simple/arm.c
@@ -0,0 +1,75 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file arm.c
+/// \brief Filter for ARM binaries
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+arm_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ size_t i;
+ for (i = 0; i + 4 <= size; i += 4) {
+ if (buffer[i + 3] == 0xEB) {
+ uint32_t src = ((uint32_t)(buffer[i + 2]) << 16)
+ | ((uint32_t)(buffer[i + 1]) << 8)
+ | (uint32_t)(buffer[i + 0]);
+ src <<= 2;
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + 8 + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i) + 8);
+
+ dest >>= 2;
+ buffer[i + 2] = (dest >> 16);
+ buffer[i + 1] = (dest >> 8);
+ buffer[i + 0] = dest;
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+arm_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &arm_code, 0, 4, 4, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_ARM
+extern lzma_ret
+lzma_simple_arm_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_ARM
+extern lzma_ret
+lzma_simple_arm_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/arm64.c b/src/liblzma/simple/arm64.c
new file mode 100644
index 0000000..0fe0824
--- /dev/null
+++ b/src/liblzma/simple/arm64.c
@@ -0,0 +1,137 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file arm64.c
+/// \brief Filter for ARM64 binaries
+///
+/// This converts ARM64 relative addresses in the BL and ADRP immediates
+/// to absolute values to increase redundancy of ARM64 code.
+///
+/// Converting B or ADR instructions was also tested but it's not useful.
+/// A majority of the jumps for the B instruction are very small (+/- 0xFF).
+/// These are typical for loops and if-statements. Encoding them to their
+/// absolute address reduces redundancy since many of the small relative
+/// jump values are repeated, but very few of the absolute addresses are.
+//
+// Authors: Lasse Collin
+// Jia Tan
+// Igor Pavlov
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+arm64_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ size_t i;
+
+ // Clang 14.0.6 on x86-64 makes this four times bigger and 40 % slower
+ // with auto-vectorization that is enabled by default with -O2.
+ // Such vectorization bloat happens with -O2 when targeting ARM64 too
+ // but performance hasn't been tested.
+#ifdef __clang__
+# pragma clang loop vectorize(disable)
+#endif
+ for (i = 0; i + 4 <= size; i += 4) {
+ uint32_t pc = (uint32_t)(now_pos + i);
+ uint32_t instr = read32le(buffer + i);
+
+ if ((instr >> 26) == 0x25) {
+ // BL instruction:
+ // The full 26-bit immediate is converted.
+ // The range is +/-128 MiB.
+ //
+ // Using the full range is helps quite a lot with
+ // big executables. Smaller range would reduce false
+ // positives in non-code sections of the input though
+ // so this is a compromise that slightly favors big
+ // files. With the full range only six bits of the 32
+ // need to match to trigger a conversion.
+ const uint32_t src = instr;
+ instr = 0x94000000;
+
+ pc >>= 2;
+ if (!is_encoder)
+ pc = 0U - pc;
+
+ instr |= (src + pc) & 0x03FFFFFF;
+ write32le(buffer + i, instr);
+
+ } else if ((instr & 0x9F000000) == 0x90000000) {
+ // ADRP instruction:
+ // Only values in the range +/-512 MiB are converted.
+ //
+ // Using less than the full +/-4 GiB range reduces
+ // false positives on non-code sections of the input
+ // while being excellent for executables up to 512 MiB.
+ // The positive effect of ADRP conversion is smaller
+ // than that of BL but it also doesn't hurt so much in
+ // non-code sections of input because, with +/-512 MiB
+ // range, nine bits of 32 need to match to trigger a
+ // conversion (two 10-bit match choices = 9 bits).
+ const uint32_t src = ((instr >> 29) & 3)
+ | ((instr >> 3) & 0x001FFFFC);
+
+ // With the addition only one branch is needed to
+ // check the +/- range. This is usually false when
+ // processing ARM64 code so branch prediction will
+ // handle it well in terms of performance.
+ //
+ //if ((src & 0x001E0000) != 0
+ // && (src & 0x001E0000) != 0x001E0000)
+ if ((src + 0x00020000) & 0x001C0000)
+ continue;
+
+ instr &= 0x9000001F;
+
+ pc >>= 12;
+ if (!is_encoder)
+ pc = 0U - pc;
+
+ const uint32_t dest = src + pc;
+ instr |= (dest & 3) << 29;
+ instr |= (dest & 0x0003FFFC) << 3;
+ instr |= (0U - (dest & 0x00020000)) & 0x00E00000;
+ write32le(buffer + i, instr);
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+arm64_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &arm64_code, 0, 4, 4, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_ARM64
+extern lzma_ret
+lzma_simple_arm64_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm64_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_ARM64
+extern lzma_ret
+lzma_simple_arm64_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return arm64_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/armthumb.c b/src/liblzma/simple/armthumb.c
new file mode 100644
index 0000000..25d8dbd
--- /dev/null
+++ b/src/liblzma/simple/armthumb.c
@@ -0,0 +1,80 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file armthumb.c
+/// \brief Filter for ARM-Thumb binaries
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+armthumb_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ size_t i;
+ for (i = 0; i + 4 <= size; i += 2) {
+ if ((buffer[i + 1] & 0xF8) == 0xF0
+ && (buffer[i + 3] & 0xF8) == 0xF8) {
+ uint32_t src = (((uint32_t)(buffer[i + 1]) & 7) << 19)
+ | ((uint32_t)(buffer[i + 0]) << 11)
+ | (((uint32_t)(buffer[i + 3]) & 7) << 8)
+ | (uint32_t)(buffer[i + 2]);
+
+ src <<= 1;
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + 4 + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i) + 4);
+
+ dest >>= 1;
+ buffer[i + 1] = 0xF0 | ((dest >> 19) & 0x7);
+ buffer[i + 0] = (dest >> 11);
+ buffer[i + 3] = 0xF8 | ((dest >> 8) & 0x7);
+ buffer[i + 2] = (dest);
+ i += 2;
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+armthumb_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &armthumb_code, 0, 4, 2, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_ARMTHUMB
+extern lzma_ret
+lzma_simple_armthumb_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return armthumb_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_ARMTHUMB
+extern lzma_ret
+lzma_simple_armthumb_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return armthumb_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/ia64.c b/src/liblzma/simple/ia64.c
new file mode 100644
index 0000000..692b0a2
--- /dev/null
+++ b/src/liblzma/simple/ia64.c
@@ -0,0 +1,116 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file ia64.c
+/// \brief Filter for IA64 (Itanium) binaries
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+ia64_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ static const uint32_t BRANCH_TABLE[32] = {
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 4, 4, 6, 6, 0, 0, 7, 7,
+ 4, 4, 0, 0, 4, 4, 0, 0
+ };
+
+ size_t i;
+ for (i = 0; i + 16 <= size; i += 16) {
+ const uint32_t instr_template = buffer[i] & 0x1F;
+ const uint32_t mask = BRANCH_TABLE[instr_template];
+ uint32_t bit_pos = 5;
+
+ for (size_t slot = 0; slot < 3; ++slot, bit_pos += 41) {
+ if (((mask >> slot) & 1) == 0)
+ continue;
+
+ const size_t byte_pos = (bit_pos >> 3);
+ const uint32_t bit_res = bit_pos & 0x7;
+ uint64_t instruction = 0;
+
+ for (size_t j = 0; j < 6; ++j)
+ instruction += (uint64_t)(
+ buffer[i + j + byte_pos])
+ << (8 * j);
+
+ uint64_t inst_norm = instruction >> bit_res;
+
+ if (((inst_norm >> 37) & 0xF) == 0x5
+ && ((inst_norm >> 9) & 0x7) == 0
+ /* && (inst_norm & 0x3F)== 0 */
+ ) {
+ uint32_t src = (uint32_t)(
+ (inst_norm >> 13) & 0xFFFFF);
+ src |= ((inst_norm >> 36) & 1) << 20;
+
+ src <<= 4;
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i));
+
+ dest >>= 4;
+
+ inst_norm &= ~((uint64_t)(0x8FFFFF) << 13);
+ inst_norm |= (uint64_t)(dest & 0xFFFFF) << 13;
+ inst_norm |= (uint64_t)(dest & 0x100000)
+ << (36 - 20);
+
+ instruction &= (1U << bit_res) - 1;
+ instruction |= (inst_norm << bit_res);
+
+ for (size_t j = 0; j < 6; j++)
+ buffer[i + j + byte_pos] = (uint8_t)(
+ instruction
+ >> (8 * j));
+ }
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+ia64_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &ia64_code, 0, 16, 16, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_IA64
+extern lzma_ret
+lzma_simple_ia64_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return ia64_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_IA64
+extern lzma_ret
+lzma_simple_ia64_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return ia64_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/powerpc.c b/src/liblzma/simple/powerpc.c
new file mode 100644
index 0000000..3a340fd
--- /dev/null
+++ b/src/liblzma/simple/powerpc.c
@@ -0,0 +1,80 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file powerpc.c
+/// \brief Filter for PowerPC (big endian) binaries
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+powerpc_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ size_t i;
+ for (i = 0; i + 4 <= size; i += 4) {
+ // PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link)
+ if ((buffer[i] >> 2) == 0x12
+ && ((buffer[i + 3] & 3) == 1)) {
+
+ const uint32_t src
+ = (((uint32_t)(buffer[i + 0]) & 3) << 24)
+ | ((uint32_t)(buffer[i + 1]) << 16)
+ | ((uint32_t)(buffer[i + 2]) << 8)
+ | ((uint32_t)(buffer[i + 3]) & ~UINT32_C(3));
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i));
+
+ buffer[i + 0] = 0x48 | ((dest >> 24) & 0x03);
+ buffer[i + 1] = (dest >> 16);
+ buffer[i + 2] = (dest >> 8);
+ buffer[i + 3] &= 0x03;
+ buffer[i + 3] |= dest;
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+powerpc_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &powerpc_code, 0, 4, 4, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_POWERPC
+extern lzma_ret
+lzma_simple_powerpc_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return powerpc_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_POWERPC
+extern lzma_ret
+lzma_simple_powerpc_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return powerpc_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/simple_coder.c b/src/liblzma/simple/simple_coder.c
new file mode 100644
index 0000000..ed2d7fb
--- /dev/null
+++ b/src/liblzma/simple/simple_coder.c
@@ -0,0 +1,292 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_coder.c
+/// \brief Wrapper for simple filters
+///
+/// Simple filters don't change the size of the data i.e. number of bytes
+/// in equals the number of bytes out.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+/// Copied or encodes/decodes more data to out[].
+static lzma_ret
+copy_or_code(lzma_simple_coder *coder, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ assert(!coder->end_was_reached);
+
+ if (coder->next.code == NULL) {
+ lzma_bufcpy(in, in_pos, in_size, out, out_pos, out_size);
+
+ // Check if end of stream was reached.
+ if (coder->is_encoder && action == LZMA_FINISH
+ && *in_pos == in_size)
+ coder->end_was_reached = true;
+
+ } else {
+ // Call the next coder in the chain to provide us some data.
+ const lzma_ret ret = coder->next.code(
+ coder->next.coder, allocator,
+ in, in_pos, in_size,
+ out, out_pos, out_size, action);
+
+ if (ret == LZMA_STREAM_END) {
+ assert(!coder->is_encoder
+ || action == LZMA_FINISH);
+ coder->end_was_reached = true;
+
+ } else if (ret != LZMA_OK) {
+ return ret;
+ }
+ }
+
+ return LZMA_OK;
+}
+
+
+static size_t
+call_filter(lzma_simple_coder *coder, uint8_t *buffer, size_t size)
+{
+ const size_t filtered = coder->filter(coder->simple,
+ coder->now_pos, coder->is_encoder,
+ buffer, size);
+ coder->now_pos += filtered;
+ return filtered;
+}
+
+
+static lzma_ret
+simple_code(void *coder_ptr, const lzma_allocator *allocator,
+ const uint8_t *restrict in, size_t *restrict in_pos,
+ size_t in_size, uint8_t *restrict out,
+ size_t *restrict out_pos, size_t out_size, lzma_action action)
+{
+ lzma_simple_coder *coder = coder_ptr;
+
+ // TODO: Add partial support for LZMA_SYNC_FLUSH. We can support it
+ // in cases when the filter is able to filter everything. With most
+ // simple filters it can be done at offset that is a multiple of 2,
+ // 4, or 16. With x86 filter, it needs good luck, and thus cannot
+ // be made to work predictably.
+ if (action == LZMA_SYNC_FLUSH)
+ return LZMA_OPTIONS_ERROR;
+
+ // Flush already filtered data from coder->buffer[] to out[].
+ if (coder->pos < coder->filtered) {
+ lzma_bufcpy(coder->buffer, &coder->pos, coder->filtered,
+ out, out_pos, out_size);
+
+ // If we couldn't flush all the filtered data, return to
+ // application immediately.
+ if (coder->pos < coder->filtered)
+ return LZMA_OK;
+
+ if (coder->end_was_reached) {
+ assert(coder->filtered == coder->size);
+ return LZMA_STREAM_END;
+ }
+ }
+
+ // If we get here, there is no filtered data left in the buffer.
+ coder->filtered = 0;
+
+ assert(!coder->end_was_reached);
+
+ // If there is more output space left than there is unfiltered data
+ // in coder->buffer[], flush coder->buffer[] to out[], and copy/code
+ // more data to out[] hopefully filling it completely. Then filter
+ // the data in out[]. This step is where most of the data gets
+ // filtered if the buffer sizes used by the application are reasonable.
+ const size_t out_avail = out_size - *out_pos;
+ const size_t buf_avail = coder->size - coder->pos;
+ if (out_avail > buf_avail || buf_avail == 0) {
+ // Store the old position so that we know from which byte
+ // to start filtering.
+ const size_t out_start = *out_pos;
+
+ // Flush data from coder->buffer[] to out[], but don't reset
+ // coder->pos and coder->size yet. This way the coder can be
+ // restarted if the next filter in the chain returns e.g.
+ // LZMA_MEM_ERROR.
+ //
+ // Do the memcpy() conditionally because out can be NULL
+ // (in which case buf_avail is always 0). Calling memcpy()
+ // with a null-pointer is undefined even if the third
+ // argument is 0.
+ if (buf_avail > 0)
+ memcpy(out + *out_pos, coder->buffer + coder->pos,
+ buf_avail);
+
+ *out_pos += buf_avail;
+
+ // Copy/Encode/Decode more data to out[].
+ {
+ const lzma_ret ret = copy_or_code(coder, allocator,
+ in, in_pos, in_size,
+ out, out_pos, out_size, action);
+ assert(ret != LZMA_STREAM_END);
+ if (ret != LZMA_OK)
+ return ret;
+ }
+
+ // Filter out[] unless there is nothing to filter.
+ // This way we avoid null pointer + 0 (undefined behavior)
+ // when out == NULL.
+ const size_t size = *out_pos - out_start;
+ const size_t filtered = size == 0 ? 0 : call_filter(
+ coder, out + out_start, size);
+
+ const size_t unfiltered = size - filtered;
+ assert(unfiltered <= coder->allocated / 2);
+
+ // Now we can update coder->pos and coder->size, because
+ // the next coder in the chain (if any) was successful.
+ coder->pos = 0;
+ coder->size = unfiltered;
+
+ if (coder->end_was_reached) {
+ // The last byte has been copied to out[] already.
+ // They are left as is.
+ coder->size = 0;
+
+ } else if (unfiltered > 0) {
+ // There is unfiltered data left in out[]. Copy it to
+ // coder->buffer[] and rewind *out_pos appropriately.
+ *out_pos -= unfiltered;
+ memcpy(coder->buffer, out + *out_pos, unfiltered);
+ }
+ } else if (coder->pos > 0) {
+ memmove(coder->buffer, coder->buffer + coder->pos, buf_avail);
+ coder->size -= coder->pos;
+ coder->pos = 0;
+ }
+
+ assert(coder->pos == 0);
+
+ // If coder->buffer[] isn't empty, try to fill it by copying/decoding
+ // more data. Then filter coder->buffer[] and copy the successfully
+ // filtered data to out[]. It is probable, that some filtered and
+ // unfiltered data will be left to coder->buffer[].
+ if (coder->size > 0) {
+ {
+ const lzma_ret ret = copy_or_code(coder, allocator,
+ in, in_pos, in_size,
+ coder->buffer, &coder->size,
+ coder->allocated, action);
+ assert(ret != LZMA_STREAM_END);
+ if (ret != LZMA_OK)
+ return ret;
+ }
+
+ coder->filtered = call_filter(
+ coder, coder->buffer, coder->size);
+
+ // Everything is considered to be filtered if coder->buffer[]
+ // contains the last bytes of the data.
+ if (coder->end_was_reached)
+ coder->filtered = coder->size;
+
+ // Flush as much as possible.
+ lzma_bufcpy(coder->buffer, &coder->pos, coder->filtered,
+ out, out_pos, out_size);
+ }
+
+ // Check if we got everything done.
+ if (coder->end_was_reached && coder->pos == coder->size)
+ return LZMA_STREAM_END;
+
+ return LZMA_OK;
+}
+
+
+static void
+simple_coder_end(void *coder_ptr, const lzma_allocator *allocator)
+{
+ lzma_simple_coder *coder = coder_ptr;
+ lzma_next_end(&coder->next, allocator);
+ lzma_free(coder->simple, allocator);
+ lzma_free(coder, allocator);
+ return;
+}
+
+
+static lzma_ret
+simple_coder_update(void *coder_ptr, const lzma_allocator *allocator,
+ const lzma_filter *filters_null lzma_attribute((__unused__)),
+ const lzma_filter *reversed_filters)
+{
+ lzma_simple_coder *coder = coder_ptr;
+
+ // No update support, just call the next filter in the chain.
+ return lzma_next_filter_update(
+ &coder->next, allocator, reversed_filters + 1);
+}
+
+
+extern lzma_ret
+lzma_simple_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ size_t (*filter)(void *simple, uint32_t now_pos,
+ bool is_encoder, uint8_t *buffer, size_t size),
+ size_t simple_size, size_t unfiltered_max,
+ uint32_t alignment, bool is_encoder)
+{
+ // Allocate memory for the lzma_simple_coder structure if needed.
+ lzma_simple_coder *coder = next->coder;
+ if (coder == NULL) {
+ // Here we allocate space also for the temporary buffer. We
+ // need twice the size of unfiltered_max, because then it
+ // is always possible to filter at least unfiltered_max bytes
+ // more data in coder->buffer[] if it can be filled completely.
+ coder = lzma_alloc(sizeof(lzma_simple_coder)
+ + 2 * unfiltered_max, allocator);
+ if (coder == NULL)
+ return LZMA_MEM_ERROR;
+
+ next->coder = coder;
+ next->code = &simple_code;
+ next->end = &simple_coder_end;
+ next->update = &simple_coder_update;
+
+ coder->next = LZMA_NEXT_CODER_INIT;
+ coder->filter = filter;
+ coder->allocated = 2 * unfiltered_max;
+
+ // Allocate memory for filter-specific data structure.
+ if (simple_size > 0) {
+ coder->simple = lzma_alloc(simple_size, allocator);
+ if (coder->simple == NULL)
+ return LZMA_MEM_ERROR;
+ } else {
+ coder->simple = NULL;
+ }
+ }
+
+ if (filters[0].options != NULL) {
+ const lzma_options_bcj *simple = filters[0].options;
+ coder->now_pos = simple->start_offset;
+ if (coder->now_pos & (alignment - 1))
+ return LZMA_OPTIONS_ERROR;
+ } else {
+ coder->now_pos = 0;
+ }
+
+ // Reset variables.
+ coder->is_encoder = is_encoder;
+ coder->end_was_reached = false;
+ coder->pos = 0;
+ coder->filtered = 0;
+ coder->size = 0;
+
+ return lzma_next_filter_init(&coder->next, allocator, filters + 1);
+}
diff --git a/src/liblzma/simple/simple_coder.h b/src/liblzma/simple/simple_coder.h
new file mode 100644
index 0000000..668a509
--- /dev/null
+++ b/src/liblzma/simple/simple_coder.h
@@ -0,0 +1,81 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_coder.h
+/// \brief Wrapper for simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SIMPLE_CODER_H
+#define LZMA_SIMPLE_CODER_H
+
+#include "common.h"
+
+
+extern lzma_ret lzma_simple_x86_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_x86_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_powerpc_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_powerpc_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_ia64_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_ia64_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_arm_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_arm_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_armthumb_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_armthumb_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_arm64_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_arm64_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+
+extern lzma_ret lzma_simple_sparc_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+extern lzma_ret lzma_simple_sparc_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters);
+
+#endif
diff --git a/src/liblzma/simple/simple_decoder.c b/src/liblzma/simple/simple_decoder.c
new file mode 100644
index 0000000..dc4d241
--- /dev/null
+++ b/src/liblzma/simple/simple_decoder.c
@@ -0,0 +1,40 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_decoder.c
+/// \brief Properties decoder for simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_decoder.h"
+
+
+extern lzma_ret
+lzma_simple_props_decode(void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ if (props_size == 0)
+ return LZMA_OK;
+
+ if (props_size != 4)
+ return LZMA_OPTIONS_ERROR;
+
+ lzma_options_bcj *opt = lzma_alloc(
+ sizeof(lzma_options_bcj), allocator);
+ if (opt == NULL)
+ return LZMA_MEM_ERROR;
+
+ opt->start_offset = read32le(props);
+
+ // Don't leave an options structure allocated if start_offset is zero.
+ if (opt->start_offset == 0)
+ lzma_free(opt, allocator);
+ else
+ *options = opt;
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/simple/simple_decoder.h b/src/liblzma/simple/simple_decoder.h
new file mode 100644
index 0000000..bed8d37
--- /dev/null
+++ b/src/liblzma/simple/simple_decoder.h
@@ -0,0 +1,22 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_decoder.h
+/// \brief Properties decoder for simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SIMPLE_DECODER_H
+#define LZMA_SIMPLE_DECODER_H
+
+#include "simple_coder.h"
+
+extern lzma_ret lzma_simple_props_decode(
+ void **options, const lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size);
+
+#endif
diff --git a/src/liblzma/simple/simple_encoder.c b/src/liblzma/simple/simple_encoder.c
new file mode 100644
index 0000000..d2cc03e
--- /dev/null
+++ b/src/liblzma/simple/simple_encoder.c
@@ -0,0 +1,38 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_encoder.c
+/// \brief Properties encoder for simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_encoder.h"
+
+
+extern lzma_ret
+lzma_simple_props_size(uint32_t *size, const void *options)
+{
+ const lzma_options_bcj *const opt = options;
+ *size = (opt == NULL || opt->start_offset == 0) ? 0 : 4;
+ return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_simple_props_encode(const void *options, uint8_t *out)
+{
+ const lzma_options_bcj *const opt = options;
+
+ // The default start offset is zero, so we don't need to store any
+ // options unless the start offset is non-zero.
+ if (opt == NULL || opt->start_offset == 0)
+ return LZMA_OK;
+
+ write32le(out, opt->start_offset);
+
+ return LZMA_OK;
+}
diff --git a/src/liblzma/simple/simple_encoder.h b/src/liblzma/simple/simple_encoder.h
new file mode 100644
index 0000000..1cee482
--- /dev/null
+++ b/src/liblzma/simple/simple_encoder.h
@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_encoder.c
+/// \brief Properties encoder for simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SIMPLE_ENCODER_H
+#define LZMA_SIMPLE_ENCODER_H
+
+#include "simple_coder.h"
+
+
+extern lzma_ret lzma_simple_props_size(uint32_t *size, const void *options);
+
+extern lzma_ret lzma_simple_props_encode(const void *options, uint8_t *out);
+
+#endif
diff --git a/src/liblzma/simple/simple_private.h b/src/liblzma/simple/simple_private.h
new file mode 100644
index 0000000..9d2c0fd
--- /dev/null
+++ b/src/liblzma/simple/simple_private.h
@@ -0,0 +1,74 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_private.h
+/// \brief Private definitions for so called simple filters
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SIMPLE_PRIVATE_H
+#define LZMA_SIMPLE_PRIVATE_H
+
+#include "simple_coder.h"
+
+
+typedef struct {
+ /// Next filter in the chain
+ lzma_next_coder next;
+
+ /// True if the next coder in the chain has returned LZMA_STREAM_END.
+ bool end_was_reached;
+
+ /// True if filter() should encode the data; false to decode.
+ /// Currently all simple filters use the same function for encoding
+ /// and decoding, because the difference between encoders and decoders
+ /// is very small.
+ bool is_encoder;
+
+ /// Pointer to filter-specific function, which does
+ /// the actual filtering.
+ size_t (*filter)(void *simple, uint32_t now_pos,
+ bool is_encoder, uint8_t *buffer, size_t size);
+
+ /// Pointer to filter-specific data, or NULL if filter doesn't need
+ /// any extra data.
+ void *simple;
+
+ /// The lowest 32 bits of the current position in the data. Most
+ /// filters need this to do conversions between absolute and relative
+ /// addresses.
+ uint32_t now_pos;
+
+ /// Size of the memory allocated for the buffer.
+ size_t allocated;
+
+ /// Flushing position in the temporary buffer. buffer[pos] is the
+ /// next byte to be copied to out[].
+ size_t pos;
+
+ /// buffer[filtered] is the first unfiltered byte. When pos is smaller
+ /// than filtered, there is unflushed filtered data in the buffer.
+ size_t filtered;
+
+ /// Total number of bytes (both filtered and unfiltered) currently
+ /// in the temporary buffer.
+ size_t size;
+
+ /// Temporary buffer
+ uint8_t buffer[];
+} lzma_simple_coder;
+
+
+extern lzma_ret lzma_simple_coder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters,
+ size_t (*filter)(void *simple, uint32_t now_pos,
+ bool is_encoder, uint8_t *buffer, size_t size),
+ size_t simple_size, size_t unfiltered_max,
+ uint32_t alignment, bool is_encoder);
+
+#endif
diff --git a/src/liblzma/simple/sparc.c b/src/liblzma/simple/sparc.c
new file mode 100644
index 0000000..bad8492
--- /dev/null
+++ b/src/liblzma/simple/sparc.c
@@ -0,0 +1,87 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file sparc.c
+/// \brief Filter for SPARC binaries
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+static size_t
+sparc_code(void *simple lzma_attribute((__unused__)),
+ uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ size_t i;
+ for (i = 0; i + 4 <= size; i += 4) {
+
+ if ((buffer[i] == 0x40 && (buffer[i + 1] & 0xC0) == 0x00)
+ || (buffer[i] == 0x7F
+ && (buffer[i + 1] & 0xC0) == 0xC0)) {
+
+ uint32_t src = ((uint32_t)buffer[i + 0] << 24)
+ | ((uint32_t)buffer[i + 1] << 16)
+ | ((uint32_t)buffer[i + 2] << 8)
+ | ((uint32_t)buffer[i + 3]);
+
+ src <<= 2;
+
+ uint32_t dest;
+ if (is_encoder)
+ dest = now_pos + (uint32_t)(i) + src;
+ else
+ dest = src - (now_pos + (uint32_t)(i));
+
+ dest >>= 2;
+
+ dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF)
+ | (dest & 0x3FFFFF)
+ | 0x40000000;
+
+ buffer[i + 0] = (uint8_t)(dest >> 24);
+ buffer[i + 1] = (uint8_t)(dest >> 16);
+ buffer[i + 2] = (uint8_t)(dest >> 8);
+ buffer[i + 3] = (uint8_t)(dest);
+ }
+ }
+
+ return i;
+}
+
+
+static lzma_ret
+sparc_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ return lzma_simple_coder_init(next, allocator, filters,
+ &sparc_code, 0, 4, 4, is_encoder);
+}
+
+
+#ifdef HAVE_ENCODER_SPARC
+extern lzma_ret
+lzma_simple_sparc_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return sparc_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_SPARC
+extern lzma_ret
+lzma_simple_sparc_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return sparc_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/simple/x86.c b/src/liblzma/simple/x86.c
new file mode 100644
index 0000000..232b295
--- /dev/null
+++ b/src/liblzma/simple/x86.c
@@ -0,0 +1,163 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file x86.c
+/// \brief Filter for x86 binaries (BCJ filter)
+///
+// Authors: Igor Pavlov
+// Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "simple_private.h"
+
+
+#define Test86MSByte(b) ((b) == 0 || (b) == 0xFF)
+
+
+typedef struct {
+ uint32_t prev_mask;
+ uint32_t prev_pos;
+} lzma_simple_x86;
+
+
+static size_t
+x86_code(void *simple_ptr, uint32_t now_pos, bool is_encoder,
+ uint8_t *buffer, size_t size)
+{
+ static const bool MASK_TO_ALLOWED_STATUS[8]
+ = { true, true, true, false, true, false, false, false };
+
+ static const uint32_t MASK_TO_BIT_NUMBER[8]
+ = { 0, 1, 2, 2, 3, 3, 3, 3 };
+
+ lzma_simple_x86 *simple = simple_ptr;
+ uint32_t prev_mask = simple->prev_mask;
+ uint32_t prev_pos = simple->prev_pos;
+
+ if (size < 5)
+ return 0;
+
+ if (now_pos - prev_pos > 5)
+ prev_pos = now_pos - 5;
+
+ const size_t limit = size - 5;
+ size_t buffer_pos = 0;
+
+ while (buffer_pos <= limit) {
+ uint8_t b = buffer[buffer_pos];
+ if (b != 0xE8 && b != 0xE9) {
+ ++buffer_pos;
+ continue;
+ }
+
+ const uint32_t offset = now_pos + (uint32_t)(buffer_pos)
+ - prev_pos;
+ prev_pos = now_pos + (uint32_t)(buffer_pos);
+
+ if (offset > 5) {
+ prev_mask = 0;
+ } else {
+ for (uint32_t i = 0; i < offset; ++i) {
+ prev_mask &= 0x77;
+ prev_mask <<= 1;
+ }
+ }
+
+ b = buffer[buffer_pos + 4];
+
+ if (Test86MSByte(b)
+ && MASK_TO_ALLOWED_STATUS[(prev_mask >> 1) & 0x7]
+ && (prev_mask >> 1) < 0x10) {
+
+ uint32_t src = ((uint32_t)(b) << 24)
+ | ((uint32_t)(buffer[buffer_pos + 3]) << 16)
+ | ((uint32_t)(buffer[buffer_pos + 2]) << 8)
+ | (buffer[buffer_pos + 1]);
+
+ uint32_t dest;
+ while (true) {
+ if (is_encoder)
+ dest = src + (now_pos + (uint32_t)(
+ buffer_pos) + 5);
+ else
+ dest = src - (now_pos + (uint32_t)(
+ buffer_pos) + 5);
+
+ if (prev_mask == 0)
+ break;
+
+ const uint32_t i = MASK_TO_BIT_NUMBER[
+ prev_mask >> 1];
+
+ b = (uint8_t)(dest >> (24 - i * 8));
+
+ if (!Test86MSByte(b))
+ break;
+
+ src = dest ^ ((1U << (32 - i * 8)) - 1);
+ }
+
+ buffer[buffer_pos + 4]
+ = (uint8_t)(~(((dest >> 24) & 1) - 1));
+ buffer[buffer_pos + 3] = (uint8_t)(dest >> 16);
+ buffer[buffer_pos + 2] = (uint8_t)(dest >> 8);
+ buffer[buffer_pos + 1] = (uint8_t)(dest);
+ buffer_pos += 5;
+ prev_mask = 0;
+
+ } else {
+ ++buffer_pos;
+ prev_mask |= 1;
+ if (Test86MSByte(b))
+ prev_mask |= 0x10;
+ }
+ }
+
+ simple->prev_mask = prev_mask;
+ simple->prev_pos = prev_pos;
+
+ return buffer_pos;
+}
+
+
+static lzma_ret
+x86_coder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+ const lzma_filter_info *filters, bool is_encoder)
+{
+ const lzma_ret ret = lzma_simple_coder_init(next, allocator, filters,
+ &x86_code, sizeof(lzma_simple_x86), 5, 1, is_encoder);
+
+ if (ret == LZMA_OK) {
+ lzma_simple_coder *coder = next->coder;
+ lzma_simple_x86 *simple = coder->simple;
+ simple->prev_mask = 0;
+ simple->prev_pos = (uint32_t)(-5);
+ }
+
+ return ret;
+}
+
+
+#ifdef HAVE_ENCODER_X86
+extern lzma_ret
+lzma_simple_x86_encoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return x86_coder_init(next, allocator, filters, true);
+}
+#endif
+
+
+#ifdef HAVE_DECODER_X86
+extern lzma_ret
+lzma_simple_x86_decoder_init(lzma_next_coder *next,
+ const lzma_allocator *allocator,
+ const lzma_filter_info *filters)
+{
+ return x86_coder_init(next, allocator, filters, false);
+}
+#endif
diff --git a/src/liblzma/validate_map.sh b/src/liblzma/validate_map.sh
new file mode 100644
index 0000000..2bf6f8b
--- /dev/null
+++ b/src/liblzma/validate_map.sh
@@ -0,0 +1,165 @@
+#!/bin/sh
+
+###############################################################################
+#
+# Check liblzma_*.map for certain types of errors.
+#
+# liblzma_generic.map is for FreeBSD and Solaris and possibly others
+# except GNU/Linux.
+#
+# liblzma_linux.map is for GNU/Linux only. This and the matching extra code
+# in the .c files make liblzma >= 5.2.7 compatible with binaries that were
+# linked against ill-patched liblzma in RHEL/CentOS 7. By providing the
+# compatibility in official XZ Utils release will hopefully prevent people
+# from further copying the broken patch to other places when they want
+# compatibility with binaries linked on RHEL/CentOS 7. The long version
+# of the story:
+#
+# RHEL/CentOS 7 shipped with 5.1.2alpha, including the threaded
+# encoder that is behind #ifdef LZMA_UNSTABLE in the API headers.
+# In 5.1.2alpha these symbols are under XZ_5.1.2alpha in liblzma.map.
+# API/ABI compatibility tracking isn't done between development
+# releases so newer releases didn't have XZ_5.1.2alpha anymore.
+#
+# Later RHEL/CentOS 7 updated xz to 5.2.2 but they wanted to keep
+# the exported symbols compatible with 5.1.2alpha. After checking
+# the ABI changes it turned out that >= 5.2.0 ABI is backward
+# compatible with the threaded encoder functions from 5.1.2alpha
+# (but not vice versa as fixes and extensions to these functions
+# were made between 5.1.2alpha and 5.2.0).
+#
+# In RHEL/CentOS 7, XZ Utils 5.2.2 was patched with
+# xz-5.2.2-compat-libs.patch to modify liblzma.map:
+#
+# - XZ_5.1.2alpha was added with lzma_stream_encoder_mt and
+# lzma_stream_encoder_mt_memusage. This matched XZ Utils 5.1.2alpha.
+#
+# - XZ_5.2 was replaced with XZ_5.2.2. It is clear that this was
+# an error; the intention was to keep using XZ_5.2 (XZ_5.2.2
+# has never been used in XZ Utils). So XZ_5.2.2 lists all
+# symbols that were listed under XZ_5.2 before the patch.
+# lzma_stream_encoder_mt and _mt_memusage are included too so
+# they are listed both here and under XZ_5.1.2alpha.
+#
+# The patch didn't add any __asm__(".symver ...") lines to the .c
+# files. Thus the resulting liblzma.so exports the threaded encoder
+# functions under XZ_5.1.2alpha only. Listing the two functions
+# also under XZ_5.2.2 in liblzma.map has no effect without
+# matching .symver lines.
+#
+# The lack of XZ_5.2 in RHEL/CentOS 7 means that binaries linked
+# against unpatched XZ Utils 5.2.x won't run on RHEL/CentOS 7.
+# This is unfortunate but this alone isn't too bad as the problem
+# is contained within RHEL/CentOS 7 and doesn't affect users
+# of other distributions. It could also be fixed internally in
+# RHEL/CentOS 7.
+#
+# The second problem is more serious: In XZ Utils 5.2.2 the API
+# headers don't have #ifdef LZMA_UNSTABLE for obvious reasons.
+# This is true in RHEL/CentOS 7 version too. Thus now programs
+# using new APIs can be compiled without an extra #define. However,
+# the programs end up depending on symbol version XZ_5.1.2alpha
+# (and possibly also XZ_5.2.2) instead of XZ_5.2 as they would
+# with an unpatched XZ Utils 5.2.2. This means that such binaries
+# won't run on other distributions shipping XZ Utils >= 5.2.0 as
+# they don't provide XZ_5.1.2alpha or XZ_5.2.2; they only provide
+# XZ_5.2 (and XZ_5.0). (This includes RHEL/CentOS 8 as the patch
+# luckily isn't included there anymore with XZ Utils 5.2.4.)
+#
+# Binaries built by RHEL/CentOS 7 users get distributed and then
+# people wonder why they don't run on some other distribution.
+# Seems that people have found out about the patch and been copying
+# it to some build scripts, seemingly curing the symptoms but
+# actually spreading the illness further and outside RHEL/CentOS 7.
+# Adding compatibility in an official XZ Utils release should work
+# as a vaccine against this ill patch and stop it from spreading.
+# The vaccine is kept GNU/Linux-only as other OSes should be immune
+# (hopefully it hasn't spread via some build script to other OSes).
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+###############################################################################
+
+LC_ALL=C
+export LC_ALL
+
+STATUS=0
+
+cd "$(dirname "$0")"
+
+# Get the list of symbols that aren't defined in liblzma_generic.map.
+SYMS=$(sed -n 's/^extern LZMA_API([^)]*) \([a-z0-9_]*\)(.*$/\1;/p' \
+ api/lzma/*.h \
+ | sort \
+ | grep -Fve "$(sed '/[{}:*]/d;/^$/d;s/^ //' liblzma_generic.map)")
+
+# Check that there are no old alpha or beta versions listed.
+VER=$(cd ../.. && sh build-aux/version.sh)
+NAMES=
+case $VER in
+ *alpha | *beta)
+ NAMES=$(sed -n 's/^.*XZ_\([^ ]*\)\(alpha\|beta\) .*$/\1\2/p' \
+ liblzma_generic.map | grep -Fv "$VER")
+ ;;
+esac
+
+# Check for duplicate lines. It can catch missing dependencies.
+DUPS=$(sort liblzma_generic.map | sed '/^$/d;/^global:$/d' | uniq -d)
+
+# Check that liblzma_linux.map is in sync with liblzma_generic.map.
+# The RHEL/CentOS 7 compatibility symbols are in a fixed location
+# so it makes it easy to remove them for comparison with liblzma_generic.map.
+#
+# NOTE: Putting XZ_5.2 before the compatibility symbols XZ_5.1.2alpha
+# and XZ_5.2.2 in liblzma_linux.map is important: If liblzma_linux.map is
+# incorrectly used without #define HAVE_SYMBOL_VERSIONS_LINUX, only the first
+# occurrence of each function name will be used from liblzma_linux.map;
+# the rest are ignored by the linker. Thus having XZ_5.2 before the
+# compatibility symbols means that @@XZ_5.2 will be used for the symbols
+# listed under XZ_5.2 {...} and the same function names later in
+# the file under XZ_5.1.2alpha {...} and XZ_5.2.2 {...} will be
+# ignored (@XZ_5.1.2alpha or @XZ_5.2.2 won't be added at all when
+# the #define HAVE_SYMBOL_VERSIONS_LINUX isn't used).
+IN_SYNC=
+if ! sed '109,123d' liblzma_linux.map \
+ | cmp -s - liblzma_generic.map; then
+ IN_SYNC=no
+fi
+
+# Print error messages if needed.
+if test -n "$SYMS$NAMES$DUPS$IN_SYNC"; then
+ echo
+ echo 'validate_map.sh found problems from liblzma_*.map:'
+ echo
+
+ if test -n "$SYMS"; then
+ echo 'liblzma_generic.map lacks the following symbols:'
+ echo "$SYMS"
+ echo
+ fi
+
+ if test -n "$NAMES"; then
+ echo 'Obsolete alpha or beta version names:'
+ echo "$NAMES"
+ echo
+ fi
+
+ if test -n "$DUPS"; then
+ echo 'Duplicate lines:'
+ echo "$DUPS"
+ echo
+ fi
+
+ if test -n "$IN_SYNC"; then
+ echo "liblzma_generic.map and liblzma_linux.map aren't in sync"
+ echo
+ fi
+
+ STATUS=1
+fi
+
+# Exit status is 1 if problems were found, 0 otherwise.
+exit "$STATUS"
diff --git a/src/lzmainfo/Makefile.am b/src/lzmainfo/Makefile.am
new file mode 100644
index 0000000..ff7172b
--- /dev/null
+++ b/src/lzmainfo/Makefile.am
@@ -0,0 +1,39 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+bin_PROGRAMS = lzmainfo
+
+lzmainfo_SOURCES = \
+ lzmainfo.c \
+ ../common/tuklib_progname.c \
+ ../common/tuklib_exit.c
+
+if COND_W32
+lzmainfo_SOURCES += lzmainfo_w32res.rc
+endif
+
+lzmainfo_CPPFLAGS = \
+ -DLOCALEDIR=\"$(localedir)\" \
+ -I$(top_srcdir)/src/common \
+ -I$(top_srcdir)/src/liblzma/api \
+ -I$(top_builddir)/lib
+
+lzmainfo_LDADD = $(top_builddir)/src/liblzma/liblzma.la
+
+if COND_GNULIB
+lzmainfo_LDADD += $(top_builddir)/lib/libgnu.a
+endif
+
+lzmainfo_LDADD += $(LTLIBINTL)
+
+
+dist_man_MANS = lzmainfo.1
+
+# Windows resource compiler support
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(lzmainfo_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
diff --git a/src/lzmainfo/Makefile.in b/src/lzmainfo/Makefile.in
new file mode 100644
index 0000000..0a18942
--- /dev/null
+++ b/src/lzmainfo/Makefile.in
@@ -0,0 +1,837 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
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+ else \
+ false; \
+ fi; \
+}
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+ -rm -rf .libs _libs
+install-man1: $(dist_man_MANS)
+ @$(NORMAL_INSTALL)
+ @list1=''; \
+ list2='$(dist_man_MANS)'; \
+ test -n "$(man1dir)" \
+ && test -n "`echo $$list1$$list2`" \
+ || exit 0; \
+ echo " $(MKDIR_P) '$(DESTDIR)$(man1dir)'"; \
+ $(MKDIR_P) "$(DESTDIR)$(man1dir)" || exit 1; \
+ { for i in $$list1; do echo "$$i"; done; \
+ if test -n "$$list2"; then \
+ for i in $$list2; do echo "$$i"; done \
+ | sed -n '/\.1[a-z]*$$/p'; \
+ fi; \
+ } | while read p; do \
+ if test -f $$p; then d=; else d="$(srcdir)/"; fi; \
+ echo "$$d$$p"; echo "$$p"; \
+ done | \
+ sed -e 'n;s,.*/,,;p;h;s,.*\.,,;s,^[^1][0-9a-z]*$$,1,;x' \
+ -e 's,\.[0-9a-z]*$$,,;$(transform);G;s,\n,.,' | \
+ sed 'N;N;s,\n, ,g' | { \
+ list=; while read file base inst; do \
+ if test "$$base" = "$$inst"; then list="$$list $$file"; else \
+ echo " $(INSTALL_DATA) '$$file' '$(DESTDIR)$(man1dir)/$$inst'"; \
+ $(INSTALL_DATA) "$$file" "$(DESTDIR)$(man1dir)/$$inst" || exit $$?; \
+ fi; \
+ done; \
+ for i in $$list; do echo "$$i"; done | $(am__base_list) | \
+ while read files; do \
+ test -z "$$files" || { \
+ echo " $(INSTALL_DATA) $$files '$(DESTDIR)$(man1dir)'"; \
+ $(INSTALL_DATA) $$files "$(DESTDIR)$(man1dir)" || exit $$?; }; \
+ done; }
+
+uninstall-man1:
+ @$(NORMAL_UNINSTALL)
+ @list=''; test -n "$(man1dir)" || exit 0; \
+ files=`{ for i in $$list; do echo "$$i"; done; \
+ l2='$(dist_man_MANS)'; for i in $$l2; do echo "$$i"; done | \
+ sed -n '/\.1[a-z]*$$/p'; \
+ } | sed -e 's,.*/,,;h;s,.*\.,,;s,^[^1][0-9a-z]*$$,1,;x' \
+ -e 's,\.[0-9a-z]*$$,,;$(transform);G;s,\n,.,'`; \
+ dir='$(DESTDIR)$(man1dir)'; $(am__uninstall_files_from_dir)
+
+ID: $(am__tagged_files)
+ $(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+ set x; \
+ here=`pwd`; \
+ $(am__define_uniq_tagged_files); \
+ shift; \
+ if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+ test -n "$$unique" || unique=$$empty_fix; \
+ if test $$# -gt 0; then \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ "$$@" $$unique; \
+ else \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ $$unique; \
+ fi; \
+ fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+ $(am__define_uniq_tagged_files); \
+ test -z "$(CTAGS_ARGS)$$unique" \
+ || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+ $$unique
+
+GTAGS:
+ here=`$(am__cd) $(top_builddir) && pwd` \
+ && $(am__cd) $(top_srcdir) \
+ && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+ list='$(am__tagged_files)'; \
+ case "$(srcdir)" in \
+ [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+ *) sdir=$(subdir)/$(srcdir) ;; \
+ esac; \
+ for i in $$list; do \
+ if test -f "$$i"; then \
+ echo "$(subdir)/$$i"; \
+ else \
+ echo "$$sdir/$$i"; \
+ fi; \
+ done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+ -rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+ @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ list='$(DISTFILES)'; \
+ dist_files=`for file in $$list; do echo $$file; done | \
+ sed -e "s|^$$srcdirstrip/||;t" \
+ -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+ case $$dist_files in \
+ */*) $(MKDIR_P) `echo "$$dist_files" | \
+ sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+ sort -u` ;; \
+ esac; \
+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+ if test -d $$d/$$file; then \
+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+ if test -d "$(distdir)/$$file"; then \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+ cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
+ fi; \
+ done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS) $(MANS)
+installdirs:
+ for dir in "$(DESTDIR)$(bindir)" "$(DESTDIR)$(man1dir)"; do \
+ test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+ done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+ if test -z '$(STRIP)'; then \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ install; \
+ else \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+ -rm -f ./$(DEPDIR)/lzmainfo-lzmainfo.Po
+ -rm -f ./$(DEPDIR)/lzmainfo-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/lzmainfo-tuklib_progname.Po
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man1
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -f ./$(DEPDIR)/lzmainfo-lzmainfo.Po
+ -rm -f ./$(DEPDIR)/lzmainfo-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/lzmainfo-tuklib_progname.Po
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS uninstall-man
+
+uninstall-man: uninstall-man1
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+ clean-binPROGRAMS clean-generic clean-libtool cscopelist-am \
+ ctags ctags-am distclean distclean-compile distclean-generic \
+ distclean-libtool distclean-tags distdir dvi dvi-am html \
+ html-am info info-am install install-am install-binPROGRAMS \
+ install-data install-data-am install-dvi install-dvi-am \
+ install-exec install-exec-am install-html install-html-am \
+ install-info install-info-am install-man install-man1 \
+ install-pdf install-pdf-am install-ps install-ps-am \
+ install-strip installcheck installcheck-am installdirs \
+ maintainer-clean maintainer-clean-generic mostlyclean \
+ mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+ pdf pdf-am ps ps-am tags tags-am uninstall uninstall-am \
+ uninstall-binPROGRAMS uninstall-man uninstall-man1
+
+.PRECIOUS: Makefile
+
+
+# Windows resource compiler support
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(lzmainfo_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lzmainfo/lzmainfo.1 b/src/lzmainfo/lzmainfo.1
new file mode 100644
index 0000000..ce38eee
--- /dev/null
+++ b/src/lzmainfo/lzmainfo.1
@@ -0,0 +1,60 @@
+.\"
+.\" Author: Lasse Collin
+.\"
+.\" This file has been put into the public domain.
+.\" You can do whatever you want with this file.
+.\"
+.TH LZMAINFO 1 "2013-06-30" "Tukaani" "XZ Utils"
+.SH NAME
+lzmainfo \- show information stored in the .lzma file header
+.SH SYNOPSIS
+.B lzmainfo
+.RB [ \-\-help ]
+.RB [ \-\-version ]
+.RI [ file... ]
+.SH DESCRIPTION
+.B lzmainfo
+shows information stored in the
+.B .lzma
+file header.
+It reads the first 13 bytes from the specified
+.IR file ,
+decodes the header, and prints it to standard output in human
+readable format.
+If no
+.I files
+are given or
+.I file
+is
+.BR \- ,
+standard input is read.
+.PP
+Usually the most interesting information is
+the uncompressed size and the dictionary size.
+Uncompressed size can be shown only if
+the file is in the non-streamed
+.B .lzma
+format variant.
+The amount of memory required to decompress the file is
+a few dozen kilobytes plus the dictionary size.
+.PP
+.B lzmainfo
+is included in XZ Utils primarily for
+backward compatibility with LZMA Utils.
+.SH "EXIT STATUS"
+.TP
+.B 0
+All is good.
+.TP
+.B 1
+An error occurred.
+.SH BUGS
+.B lzmainfo
+uses
+.B MB
+while the correct suffix would be
+.B MiB
+(2^20 bytes).
+This is to keep the output compatible with LZMA Utils.
+.SH "SEE ALSO"
+.BR xz (1)
diff --git a/src/lzmainfo/lzmainfo.c b/src/lzmainfo/lzmainfo.c
new file mode 100644
index 0000000..71e6295
--- /dev/null
+++ b/src/lzmainfo/lzmainfo.c
@@ -0,0 +1,221 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file lzmainfo.c
+/// \brief lzmainfo tool for compatibility with LZMA Utils
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include <stdio.h>
+#include <errno.h>
+
+#include "lzma.h"
+#include "getopt.h"
+#include "tuklib_gettext.h"
+#include "tuklib_progname.h"
+#include "tuklib_exit.h"
+
+#ifdef TUKLIB_DOSLIKE
+# include <fcntl.h>
+# include <io.h>
+#endif
+
+
+tuklib_attr_noreturn
+static void
+help(void)
+{
+ printf(
+_("Usage: %s [--help] [--version] [FILE]...\n"
+"Show information stored in the .lzma file header"), progname);
+
+ printf(_(
+"\nWith no FILE, or when FILE is -, read standard input.\n"));
+ printf("\n");
+
+ printf(_("Report bugs to <%s> (in English or Finnish).\n"),
+ PACKAGE_BUGREPORT);
+ printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
+
+ tuklib_exit(EXIT_SUCCESS, EXIT_FAILURE, true);
+}
+
+
+tuklib_attr_noreturn
+static void
+version(void)
+{
+ puts("lzmainfo (" PACKAGE_NAME ") " LZMA_VERSION_STRING);
+ tuklib_exit(EXIT_SUCCESS, EXIT_FAILURE, true);
+}
+
+
+/// Parse command line options.
+static void
+parse_args(int argc, char **argv)
+{
+ enum {
+ OPT_HELP,
+ OPT_VERSION,
+ };
+
+ static const struct option long_opts[] = {
+ { "help", no_argument, NULL, OPT_HELP },
+ { "version", no_argument, NULL, OPT_VERSION },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+ while ((c = getopt_long(argc, argv, "", long_opts, NULL)) != -1) {
+ switch (c) {
+ case OPT_HELP:
+ help();
+
+ case OPT_VERSION:
+ version();
+
+ default:
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ return;
+}
+
+
+/// Primitive base-2 logarithm for integers
+static uint32_t
+my_log2(uint32_t n)
+{
+ uint32_t e;
+ for (e = 0; n > 1; ++e, n /= 2) ;
+ return e;
+}
+
+
+/// Parse the .lzma header and display information about it.
+static bool
+lzmainfo(const char *name, FILE *f)
+{
+ uint8_t buf[13];
+ const size_t size = fread(buf, 1, sizeof(buf), f);
+ if (size != 13) {
+ fprintf(stderr, "%s: %s: %s\n", progname, name,
+ ferror(f) ? strerror(errno)
+ : _("File is too small to be a .lzma file"));
+ return true;
+ }
+
+ lzma_filter filter = { .id = LZMA_FILTER_LZMA1 };
+
+ // Parse the first five bytes.
+ switch (lzma_properties_decode(&filter, NULL, buf, 5)) {
+ case LZMA_OK:
+ break;
+
+ case LZMA_OPTIONS_ERROR:
+ fprintf(stderr, "%s: %s: %s\n", progname, name,
+ _("Not a .lzma file"));
+ return true;
+
+ case LZMA_MEM_ERROR:
+ fprintf(stderr, "%s: %s\n", progname, strerror(ENOMEM));
+ exit(EXIT_FAILURE);
+
+ default:
+ fprintf(stderr, "%s: %s\n", progname,
+ _("Internal error (bug)"));
+ exit(EXIT_FAILURE);
+ }
+
+ // Uncompressed size
+ uint64_t uncompressed_size = 0;
+ for (size_t i = 0; i < 8; ++i)
+ uncompressed_size |= (uint64_t)(buf[5 + i]) << (i * 8);
+
+ // Display the results. We don't want to translate these and also
+ // will use MB instead of MiB, because someone could be parsing
+ // this output and we don't want to break that when people move
+ // from LZMA Utils to XZ Utils.
+ if (f != stdin)
+ printf("%s\n", name);
+
+ printf("Uncompressed size: ");
+ if (uncompressed_size == UINT64_MAX)
+ printf("Unknown");
+ else
+ printf("%" PRIu64 " MB (%" PRIu64 " bytes)",
+ (uncompressed_size + 512 * 1024)
+ / (1024 * 1024),
+ uncompressed_size);
+
+ lzma_options_lzma *opt = filter.options;
+
+ printf("\nDictionary size: "
+ "%" PRIu32 " MB (2^%" PRIu32 " bytes)\n"
+ "Literal context bits (lc): %" PRIu32 "\n"
+ "Literal pos bits (lp): %" PRIu32 "\n"
+ "Number of pos bits (pb): %" PRIu32 "\n",
+ (opt->dict_size + 512 * 1024) / (1024 * 1024),
+ my_log2(opt->dict_size), opt->lc, opt->lp, opt->pb);
+
+ free(opt);
+
+ return false;
+}
+
+
+extern int
+main(int argc, char **argv)
+{
+ tuklib_progname_init(argv);
+ tuklib_gettext_init(PACKAGE, LOCALEDIR);
+
+ parse_args(argc, argv);
+
+#ifdef TUKLIB_DOSLIKE
+ setmode(fileno(stdin), O_BINARY);
+#endif
+
+ int ret = EXIT_SUCCESS;
+
+ // We print empty lines around the output only when reading from
+ // files specified on the command line. This is due to how
+ // LZMA Utils did it.
+ if (optind == argc) {
+ if (lzmainfo("(stdin)", stdin))
+ ret = EXIT_FAILURE;
+ } else {
+ printf("\n");
+
+ do {
+ if (strcmp(argv[optind], "-") == 0) {
+ if (lzmainfo("(stdin)", stdin))
+ ret = EXIT_FAILURE;
+ } else {
+ FILE *f = fopen(argv[optind], "r");
+ if (f == NULL) {
+ ret = EXIT_FAILURE;
+ fprintf(stderr, "%s: %s: %s\n",
+ progname,
+ argv[optind],
+ strerror(errno));
+ continue;
+ }
+
+ if (lzmainfo(argv[optind], f))
+ ret = EXIT_FAILURE;
+
+ printf("\n");
+ fclose(f);
+ }
+ } while (++optind < argc);
+ }
+
+ tuklib_exit(ret, EXIT_FAILURE, true);
+}
diff --git a/src/lzmainfo/lzmainfo_w32res.rc b/src/lzmainfo/lzmainfo_w32res.rc
new file mode 100644
index 0000000..378fbe6
--- /dev/null
+++ b/src/lzmainfo/lzmainfo_w32res.rc
@@ -0,0 +1,12 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#define MY_TYPE VFT_APP
+#define MY_NAME "lzmainfo"
+#define MY_SUFFIX ".exe"
+#define MY_DESC "lzmainfo shows information about .lzma files"
+#include "common_w32res.rc"
diff --git a/src/scripts/Makefile.am b/src/scripts/Makefile.am
new file mode 100644
index 0000000..fe5742d
--- /dev/null
+++ b/src/scripts/Makefile.am
@@ -0,0 +1,89 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+nodist_bin_SCRIPTS = xzdiff xzgrep xzmore xzless
+dist_man_MANS = xzdiff.1 xzgrep.1 xzmore.1 xzless.1
+
+links = \
+ xzdiff-xzcmp \
+ xzgrep-xzegrep \
+ xzgrep-xzfgrep
+
+if COND_LZMALINKS
+links += \
+ xzdiff-lzdiff \
+ xzdiff-lzcmp \
+ xzgrep-lzgrep \
+ xzgrep-lzegrep \
+ xzgrep-lzfgrep \
+ xzmore-lzmore \
+ xzless-lzless
+endif
+
+install-exec-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' | sed '$(transform)'` && \
+ rm -f "$$link" && \
+ $(LN_S) "$$target" "$$link"; \
+ done
+
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+install-data-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in $$languages; do \
+ mans= ; \
+ for man in $(dist_man_MANS); do \
+ man="$(top_srcdir)/po4a/man/$$lang/$$man" ; \
+ if test -f "$$man"; then \
+ mans="$$mans $$man"; \
+ fi; \
+ done; \
+ $(MAKE) dist_man_MANS="$$mans" man_MANS= \
+ mandir="$(mandir)/$$lang" install-man; \
+ done; \
+ for lang in . $$languages; do \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' \
+ | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' \
+ | sed '$(transform)'` && \
+ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+ if test -f "$$man1dir/$$target.1"; then ( \
+ cd "$$man1dir" && \
+ rm -f "$$link.1" && \
+ $(LN_S) "$$target.1" "$$link.1" \
+ ); fi; \
+ done; \
+ done
+
+uninstall-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for pair in $(links); do \
+ link=`echo $$pair | sed 's/^.*-//' | sed '$(transform)'` && \
+ rm -f "$$link"; \
+ done
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in . $$languages; do \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' \
+ | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' \
+ | sed '$(transform)'` && \
+ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$target.1" \
+ "$(DESTDIR)$(mandir)/$$lang/man1/$$link.1"; \
+ done; \
+ done
diff --git a/src/scripts/Makefile.in b/src/scripts/Makefile.in
new file mode 100644
index 0000000..42dbfff
--- /dev/null
+++ b/src/scripts/Makefile.in
@@ -0,0 +1,700 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
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+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+ if test -z '$(STRIP)'; then \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ install; \
+ else \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+ -rm -f Makefile
+distclean-am: clean-am distclean-generic
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) install-data-hook
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-nodist_binSCRIPTS
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) install-exec-hook
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man1
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-man uninstall-nodist_binSCRIPTS
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) uninstall-hook
+uninstall-man: uninstall-man1
+
+.MAKE: install-am install-data-am install-exec-am install-strip \
+ uninstall-am
+
+.PHONY: all all-am check check-am clean clean-generic clean-libtool \
+ cscopelist-am ctags-am distclean distclean-generic \
+ distclean-libtool distdir dvi dvi-am html html-am info info-am \
+ install install-am install-data install-data-am \
+ install-data-hook install-dvi install-dvi-am install-exec \
+ install-exec-am install-exec-hook install-html install-html-am \
+ install-info install-info-am install-man install-man1 \
+ install-nodist_binSCRIPTS install-pdf install-pdf-am \
+ install-ps install-ps-am install-strip installcheck \
+ installcheck-am installdirs maintainer-clean \
+ maintainer-clean-generic mostlyclean mostlyclean-generic \
+ mostlyclean-libtool pdf pdf-am ps ps-am tags-am uninstall \
+ uninstall-am uninstall-hook uninstall-man uninstall-man1 \
+ uninstall-nodist_binSCRIPTS
+
+.PRECIOUS: Makefile
+
+
+install-exec-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' | sed '$(transform)'` && \
+ rm -f "$$link" && \
+ $(LN_S) "$$target" "$$link"; \
+ done
+
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+install-data-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in $$languages; do \
+ mans= ; \
+ for man in $(dist_man_MANS); do \
+ man="$(top_srcdir)/po4a/man/$$lang/$$man" ; \
+ if test -f "$$man"; then \
+ mans="$$mans $$man"; \
+ fi; \
+ done; \
+ $(MAKE) dist_man_MANS="$$mans" man_MANS= \
+ mandir="$(mandir)/$$lang" install-man; \
+ done; \
+ for lang in . $$languages; do \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' \
+ | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' \
+ | sed '$(transform)'` && \
+ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+ if test -f "$$man1dir/$$target.1"; then ( \
+ cd "$$man1dir" && \
+ rm -f "$$link.1" && \
+ $(LN_S) "$$target.1" "$$link.1" \
+ ); fi; \
+ done; \
+ done
+
+uninstall-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for pair in $(links); do \
+ link=`echo $$pair | sed 's/^.*-//' | sed '$(transform)'` && \
+ rm -f "$$link"; \
+ done
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in . $$languages; do \
+ for pair in $(links); do \
+ target=`echo $$pair | sed 's/-.*$$//' \
+ | sed '$(transform)'` && \
+ link=`echo $$pair | sed 's/^.*-//' \
+ | sed '$(transform)'` && \
+ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$target.1" \
+ "$(DESTDIR)$(mandir)/$$lang/man1/$$link.1"; \
+ done; \
+ done
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/scripts/xzdiff.1 b/src/scripts/xzdiff.1
new file mode 100644
index 0000000..24fed68
--- /dev/null
+++ b/src/scripts/xzdiff.1
@@ -0,0 +1,79 @@
+.\"
+.\" Original zdiff.1 for gzip: Jean-loup Gailly
+.\"
+.\" Modifications for XZ Utils: Lasse Collin
+.\" Andrew Dudman
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZDIFF 1 "2021-06-04" "Tukaani" "XZ Utils"
+.SH NAME
+xzcmp, xzdiff, lzcmp, lzdiff \- compare compressed files
+.SH SYNOPSIS
+.B xzcmp
+.RI [ cmp_options "] " file1 " [" file2 ]
+.br
+.B xzdiff
+.RI [ diff_options "] " file1 " [" file2 ]
+.br
+.B lzcmp
+.RI [ cmp_options "] " file1 " [" file2 ]
+.br
+.B lzdiff
+.RI [ diff_options "] " file1 " [" file2 ]
+.SH DESCRIPTION
+.B xzcmp
+and
+.B xzdiff
+invoke
+.BR cmp (1)
+or
+.BR diff (1)
+on files compressed with
+.BR xz (1),
+.BR lzma (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR lzop (1),
+or
+.BR zstd (1).
+All options specified are passed directly to
+.BR cmp (1)
+or
+.BR diff (1).
+If only one file is specified, then the files compared are
+.I file1
+(which must have a suffix of a supported compression format) and
+.I file1
+from which the compression format suffix has been stripped.
+If two files are specified,
+then they are uncompressed if necessary and fed to
+.BR cmp (1)
+or
+.BR diff (1).
+The exit status from
+.BR cmp (1)
+or
+.BR diff (1)
+is preserved unless a decompression error occurs; then exit status is 2.
+.PP
+The names
+.B lzcmp
+and
+.B lzdiff
+are provided for backward compatibility with LZMA Utils.
+.SH "SEE ALSO"
+.BR cmp (1),
+.BR diff (1),
+.BR xz (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR lzop (1),
+.BR zstd (1),
+.BR zdiff (1)
+.SH BUGS
+Messages from the
+.BR cmp (1)
+or
+.BR diff (1)
+programs refer to temporary filenames instead of those specified.
diff --git a/src/scripts/xzdiff.in b/src/scripts/xzdiff.in
new file mode 100644
index 0000000..c17d78b
--- /dev/null
+++ b/src/scripts/xzdiff.in
@@ -0,0 +1,215 @@
+#!@POSIX_SHELL@
+
+# Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
+# Copyright (C) 1993 Jean-loup Gailly
+
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+@enable_path_for_scripts@
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT. With gzip, bzip2, and lzop it's OK to just unset the
+# environment variables.
+xz='@xz@ --format=auto'
+unset GZIP BZIP BZIP2 LZOP
+
+case ${0##*/} in
+ *cmp*) prog=xzcmp; cmp=${CMP:-cmp};;
+ *) prog=xzdiff; cmp=${DIFF:-diff};;
+esac
+
+version="$prog (@PACKAGE_NAME@) @VERSION@"
+
+usage="Usage: ${0##*/} [OPTION]... FILE1 [FILE2]
+Compare FILE1 to FILE2, using their uncompressed contents if they are
+compressed. If FILE2 is omitted, then the files compared are FILE1 and
+FILE1 from which the compression format suffix has been stripped.
+
+Do comparisons like '$cmp' does. OPTIONs are the same as for '$cmp'.
+
+Report bugs to <@PACKAGE_BUGREPORT@>."
+
+# sed script to escape all ' for the shell, and then (to handle trailing
+# newlines correctly) turn trailing X on last line into '.
+escape='
+ s/'\''/'\''\\'\'''\''/g
+ $s/X$/'\''/
+'
+
+while :; do
+ case $1 in
+ --h*) printf '%s\n' "$usage" || exit 2; exit;;
+ --v*) printf '%s\n' "$version" || exit 2; exit;;
+ --) shift; break;;
+ -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
+ -?*) cmp="$cmp '$1'";;
+ *) break;;
+ esac
+ shift
+done
+cmp="$cmp --"
+
+for file; do
+ test "X$file" = X- || <"$file" || exit 2
+done
+
+# xz needs -qQ to ignore warnings like unsupported check type.
+xz1="$xz -qQ"
+xz2="$xz -qQ"
+xz_status=0
+exec 3>&1
+
+if test $# -eq 1; then
+ case $1 in
+ *[-.]xz | *[-.]lzma | *[-.]lz | *.t[lx]z)
+ ;;
+ *[-.]bz2 | *.tbz | *.tbz2)
+ xz1=bzip2;;
+ *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z)
+ xz1=gzip;;
+ *[-.]lzo | *.tzo)
+ xz1=lzop;;
+ *[-.]zst | *.tzst)
+ xz1='zstd -q';;
+ *)
+ printf '%s\n' "$0: $1: Unknown compressed file name suffix" >&2
+ exit 2;;
+ esac
+ case $1 in
+ *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *[-.]lzo | *[-.]zst)
+ FILE=`expr "X$1" : 'X\(.*\)[-.][abglmostxzZ2]*$'`;;
+ *.t[abglx]z)
+ FILE=`expr "X$1" : 'X\(.*[-.]t\)[abglx]z$'`ar;;
+ *.tbz2)
+ FILE=`expr "X$1" : 'X\(.*[-.]t\)bz2$'`ar;;
+ *.tzo)
+ FILE=`expr "X$1" : 'X\(.*[-.]t\)zo$'`ar;;
+ *.tzst)
+ FILE=`expr "X$1" : 'X\(.*[-.]t\)zst$'`ar;;
+ esac
+ xz_status=$(
+ exec 4>&1
+ ($xz1 -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3
+ )
+elif test $# -eq 2; then
+ case $1 in
+ *[-.]bz2 | *.tbz | *.tbz2) xz1=bzip2;;
+ *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz1=gzip;;
+ *[-.]lzo | *.tzo) xz1=lzop;;
+ *[-.]zst | *.tzst) xz1='zstd -q';;
+ esac
+ case $2 in
+ *[-.]bz2 | *.tbz | *.tbz2) xz2=bzip2;;
+ *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) xz2=gzip;;
+ *[-.]lzo | *.tzo) xz2=lzop;;
+ *[-.]zst | *.tzst) xz2='zstd -q';;
+ esac
+ case $1 in
+ *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+ case "$2" in
+ *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+ if test "$1$2" = --; then
+ xz_status=$(
+ exec 4>&1
+ ($xz1 -cdf - 4>&-; echo $? >&4) 3>&- |
+ eval "$cmp" - - >&3
+ )
+ elif # Reject Solaris 8's buggy /bin/bash 2.03.
+ echo X | (echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) 5<&0; then
+ # NOTE: xz_status will contain two numbers.
+ xz_status=$(
+ exec 4>&1
+ ($xz1 -cdf -- "$1" 4>&-; echo $? >&4) 3>&- |
+ ( ($xz2 -cdf -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
+ eval "$cmp" /dev/fd/5 - >&3) 5<&0
+ )
+ else
+ F=`expr "/$2" : '.*/\(.*\)[-.][ablmotxz2]*$'` || F=$prog
+ tmp=
+ trap '
+ test -n "$tmp" && rm -rf "$tmp"
+ (exit 2); exit 2
+ ' HUP INT PIPE TERM 0
+ if type mktemp >/dev/null 2>&1; then
+ # Note that FreeBSD's mktemp isn't fully compatible with
+ # the implementations from mktemp.org and GNU coreutils.
+ # It is important that the -t argument is the last argument
+ # and that no "--" is used between -t and the template argument.
+ # This way this command works on all implementations.
+ tmp=`mktemp -d -t "$prog.XXXXXXXXXX"` || exit 2
+ else
+ # Fallback code if mktemp is missing. This isn't as
+ # robust as using mktemp since this doesn't try with
+ # different file names in case of a file name conflict.
+ #
+ # There's no need to save the original umask since
+ # we don't create any non-temp files. Note that using
+ # mkdir -m 0077 isn't secure since some mkdir implementations
+ # create the dir with the default umask and chmod the
+ # the dir afterwards.
+ umask 0077
+ mkdir -- "${TMPDIR-/tmp}/$prog.$$" || exit 2
+ tmp="${TMPDIR-/tmp}/$prog.$$"
+ fi
+ $xz2 -cdf -- "$2" > "$tmp/$F" || exit 2
+ xz_status=$(
+ exec 4>&1
+ ($xz1 -cdf -- "$1" 4>&-; echo $? >&4) 3>&- |
+ eval "$cmp" - '"$tmp/$F"' >&3
+ )
+ cmp_status=$?
+ rm -rf "$tmp" || xz_status=$?
+ trap - HUP INT PIPE TERM 0
+ (exit $cmp_status)
+ fi;;
+ *)
+ xz_status=$(
+ exec 4>&1
+ ($xz1 -cdf -- "$1" 4>&-; echo $? >&4) 3>&- |
+ eval "$cmp" - '"$2"' >&3
+ );;
+ esac;;
+ *)
+ case "$2" in
+ *[-.][zZ] | *_z | *[-.][gx]z | *[-.]bz2 | *[-.]lzma | *[-.]lz | *.t[abglx]z | *.tbz2 | *[-.]lzo | *.tzo | *[-.]zst | *.tzst | -)
+ xz_status=$(
+ exec 4>&1
+ ($xz2 -cdf -- "$2" 4>&-; echo $? >&4) 3>&- |
+ eval "$cmp" '"$1"' - >&3
+ );;
+ *)
+ eval "$cmp" '"$1"' '"$2"';;
+ esac;;
+ esac
+else
+ printf '%s\n' "$0: Invalid number of operands; try \`${0##*/} --help' for help" >&2
+ exit 2
+fi
+
+cmp_status=$?
+for num in $xz_status ; do
+ # 0 from decompressor means successful decompression. SIGPIPE from
+ # decompressor is possible when diff or cmp exits before the whole file
+ # has been decompressed. In that case we want to retain the exit status
+ # from diff or cmp. Note that using "trap '' PIPE" is not possible
+ # because gzip changes its behavior (including exit status) if SIGPIPE
+ # is ignored.
+ test "$num" -eq 0 && continue
+ test "$num" -ge 128 \
+ && test "$(kill -l "$num" 2> /dev/null)" = "PIPE" \
+ && continue
+ exit 2
+done
+exit $cmp_status
diff --git a/src/scripts/xzgrep.1 b/src/scripts/xzgrep.1
new file mode 100644
index 0000000..e0514b8
--- /dev/null
+++ b/src/scripts/xzgrep.1
@@ -0,0 +1,113 @@
+.\"
+.\" Original zgrep.1 for gzip: Jean-loup Gailly
+.\" Charles Levert <charles@comm.polymtl.ca>
+.\"
+.\" Modifications for XZ Utils: Lasse Collin
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZGREP 1 "2022-07-19" "Tukaani" "XZ Utils"
+.SH NAME
+xzgrep \- search compressed files for a regular expression
+.SH SYNOPSIS
+.B xzgrep
+.RI [ grep_options ]
+.RB [ \-e ]
+.I pattern
+.RI [ file... ]
+.br
+.B xzegrep
+\&...
+.br
+.B xzfgrep
+\&...
+.br
+.B lzgrep
+\&...
+.br
+.B lzegrep
+\&...
+.br
+.B lzfgrep
+\&...
+.SH DESCRIPTION
+.B xzgrep
+invokes
+.BR grep (1)
+on
+.I files
+which may be either uncompressed or compressed with
+.BR xz (1),
+.BR lzma (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR lzop (1),
+or
+.BR zstd (1).
+All options specified are passed directly to
+.BR grep (1).
+.PP
+If no
+.I file
+is specified, then standard input is decompressed if necessary
+and fed to
+.BR grep (1).
+When reading from standard input,
+.BR gzip (1),
+.BR bzip2 (1),
+.BR lzop (1),
+and
+.BR zstd (1)
+compressed files are not supported.
+.PP
+If
+.B xzgrep
+is invoked as
+.B xzegrep
+or
+.B xzfgrep
+then
+.B grep \-E
+or
+.B grep \-F
+is used instead of
+.BR grep (1).
+The same applies to names
+.BR lzgrep ,
+.BR lzegrep ,
+and
+.BR lzfgrep ,
+which are provided for backward compatibility with LZMA Utils.
+.SH EXIT STATUS
+.TP
+0
+At least one match was found from at least one of the input files.
+No errors occurred.
+.TP
+1
+No matches were found from any of the input files.
+No errors occurred.
+.TP
+>1
+One or more errors occurred.
+It is unknown if matches were found.
+.SH ENVIRONMENT
+.TP
+.B GREP
+If the
+.B GREP
+environment variable is set,
+.B xzgrep
+uses it instead of
+.BR grep (1),
+.BR "grep \-E" ,
+or
+.BR "grep \-F" .
+.SH "SEE ALSO"
+.BR grep (1),
+.BR xz (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR lzop (1),
+.BR zstd (1),
+.BR zgrep (1)
diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
new file mode 100644
index 0000000..490e47d
--- /dev/null
+++ b/src/scripts/xzgrep.in
@@ -0,0 +1,298 @@
+#!@POSIX_SHELL@
+
+# xzgrep -- a wrapper around a grep program that decompresses files as needed
+# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
+
+# Copyright (C) 1998, 2001, 2002, 2006, 2007 Free Software Foundation
+# Copyright (C) 1993 Jean-loup Gailly
+
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+@enable_path_for_scripts@
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT. With gzip, bzip2, and lzop it's OK to just unset the
+# environment variables.
+xz='@xz@ --format=auto'
+unset GZIP BZIP BZIP2 LZOP
+
+case ${0##*/} in
+ *egrep*) prog=xzegrep; grep=${GREP:-grep -E};;
+ *fgrep*) prog=xzfgrep; grep=${GREP:-grep -F};;
+ *) prog=xzgrep; grep=${GREP:-grep};;
+esac
+
+version="$prog (@PACKAGE_NAME@) @VERSION@"
+
+usage="Usage: ${0##*/} [OPTION]... [-e] PATTERN [FILE]...
+Look for instances of PATTERN in the input FILEs, using their
+uncompressed contents if they are compressed.
+
+OPTIONs are the same as for '$grep'.
+
+Report bugs to <@PACKAGE_BUGREPORT@>."
+
+# sed script to escape all ' for the shell, and then (to handle trailing
+# newlines correctly) turn trailing X on last line into '.
+escape='
+ s/'\''/'\''\\'\'''\''/g
+ $s/X$/'\''/
+'
+operands=
+have_pat=0
+files_with_matches=0
+files_without_matches=0
+no_filename=0
+with_filename=0
+
+# See if -H and --label options are supported (GNU and *BSDs).
+if test f:x = "$(eval "echo x | $grep -H --label=f x 2> /dev/null")"; then
+ grep_supports_label=1
+else
+ grep_supports_label=0
+fi
+
+while test $# -ne 0; do
+ option=$1
+ shift
+ optarg=
+
+ case $option in
+ (-[0123456789abcdEFGhHiIKlLnoPqrRsTuUvVwxyzZ]*[!0123456789]*)
+ # Something like -Fiv was specified, that is, $option contains more
+ # than one option of which the first option (in this example -F)
+ # doesn't take an argument. Split the first option into a standalone
+ # argument and continue parsing the rest of the options (in this example,
+ # replace -Fiv with -iv in the argument list and set option=-F).
+ #
+ # If there are digits [0-9] they are treated as if they were a single
+ # option character because this syntax is an alias for -C for GNU grep.
+ # For example, "grep -25F" is equivalent to "grep -C25 -F". If only
+ # digits are specified like "grep -25" we don't get here because the
+ # above pattern in the case-statement doesn't match such strings.
+ arg2=-\'$(LC_ALL=C expr "X${option}X" : 'X-.[0-9]*\(.*\)' |
+ LC_ALL=C sed "$escape")
+ eval "set -- $arg2 "'${1+"$@"}'
+ option=$(LC_ALL=C expr "X$option" : 'X\(-.[0-9]*\)');;
+ (--binary-*=* | --[lm]a*=* | --reg*=*)
+ # These options require an argument and an argument has been provided
+ # with the --foo=argument syntax. All is good.
+ ;;
+ (-[ABCDefmX] | --binary-* | --file | --[lm]a* | --reg*)
+ # These options require an argument which should now be in $1.
+ # If it isn't, display an error and exit.
+ case ${1?"$option option requires an argument"} in
+ (*\'*)
+ optarg=" '"$(printf '%sX\n' "$1" | LC_ALL=C sed "$escape");;
+ (*)
+ optarg=" '$1'";;
+ esac
+ shift;;
+ (--)
+ break;;
+ (-?*)
+ ;;
+ (*)
+ case $option in
+ (*\'*)
+ operands="$operands '"$(printf '%sX\n' "$option" |
+ LC_ALL=C sed "$escape");;
+ (*)
+ operands="$operands '$option'";;
+ esac
+ ${POSIXLY_CORRECT+break}
+ continue;;
+ esac
+
+ case $option in
+ (-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*)
+ printf >&2 '%s: %s: Option not supported\n' "$0" "$option"
+ exit 2;;
+ (-[ef]* | --file | --file=* | --reg*)
+ have_pat=1;;
+ (--h | --he | --hel | --help)
+ printf '%s\n' "$usage" || exit 2
+ exit;;
+ (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
+ | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
+ | --with-filename)
+ with_filename=1
+ continue;;
+ (-l | --files-with-*)
+ files_with_matches=1
+ continue;;
+ (-L | --files-witho*)
+ files_without_matches=1
+ continue;;
+ (-h | --no-f*)
+ no_filename=1;;
+ (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
+ printf '%s\n' "$version" || exit 2
+ exit;;
+ esac
+
+ case $option in
+ (*\'?*)
+ option=\'$(printf '%sX\n' "$option" | LC_ALL=C sed "$escape");;
+ (*)
+ option="'$option'";;
+ esac
+
+ grep="$grep $option$optarg"
+done
+
+eval "set -- $operands "'${1+"$@"}'
+
+if test $have_pat -eq 0; then
+ case ${1?"Missing pattern; try \`${0##*/} --help' for help"} in
+ (*\'*)
+ grep="$grep -e '"$(printf '%sX\n' "$1" | LC_ALL=C sed "$escape");;
+ (*)
+ grep="$grep -e '$1'";;
+ esac
+ shift
+fi
+
+if test $# -eq 0; then
+ set -- -
+fi
+
+exec 3>&1
+
+# res=1 means that no file matched yet
+res=1
+
+for i; do
+ case $i in
+ *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) uncompress="gzip -cdf";;
+ *[-.]bz2 | *[-.]tbz | *.tbz2) uncompress="bzip2 -cdf";;
+ *[-.]lzo | *[-.]tzo) uncompress="lzop -cdf";;
+ *[-.]zst | *[-.]tzst) uncompress="zstd -cdfq";; # zstd needs -q.
+ *) uncompress="$xz -cdfqQ";; # -qQ to ignore warnings like unsupp. check.
+ esac
+ # xz_status will hold the decompressor's exit status.
+ # Exit status of grep (and in rare cases, printf or sed) is
+ # available as the exit status of this assignment command.
+ xz_status=$(
+ exec 5>&1
+ ($uncompress -- "$i" 5>&-; echo $? >&5) 3>&- |
+ if test $files_with_matches -eq 1; then
+ eval "$grep -q" && { printf '%s\n' "$i" || exit 2; }
+ elif test $files_without_matches -eq 1; then
+ eval "$grep -q" || {
+ r=$?
+ if test $r -eq 1; then
+ printf '%s\n' "$i" || r=2
+ fi
+ exit $r
+ }
+ elif test $with_filename -eq 0 &&
+ { test $# -eq 1 || test $no_filename -eq 1; }; then
+ eval "$grep"
+ elif test $grep_supports_label -eq 1; then
+ # The grep implementation in use allows us to specify the filename
+ # that grep will prefix to the output lines. This is faster and
+ # less prone to security bugs than the fallback method that uses sed.
+ # This also avoids confusing output with GNU grep >= 3.5 (2020-09-27)
+ # which prints "binary file matches" to stderr instead of stdout.
+ #
+ # If reading from stdin, let grep use whatever name it prefers for
+ # stdin. With GNU grep it is a locale-specific translated string.
+ if test "x$i" = "x-"; then
+ eval "$grep -H"
+ else
+ eval "$grep -H --label \"\$i\""
+ fi
+ else
+ # Append a colon so that the last character will never be a newline
+ # which would otherwise get lost in shell command substitution.
+ i="$i:"
+
+ # Escape & \ | and newlines only if such characters are present
+ # (speed optimization).
+ case $i in
+ (*'
+'* | *'&'* | *'\'* | *'|'*)
+ # If sed fails, set i to a known safe string to ensure that
+ # failing sed did not create a half-escaped dangerous string.
+ i=$(printf '%s\n' "$i" | LC_ALL=C sed 's/[&\|]/\\&/g; $!s/$/\\/') ||
+ i='(unknown filename):';;
+ esac
+
+ # $i already ends with a colon so do not add it here.
+ sed_script="s|^|$i|"
+
+ # If grep or sed fails, pick the larger value of the two exit statuses.
+ # If sed fails, use at least 2 since we use >= 2 to indicate errors.
+ r=$(
+ exec 4>&1
+ (eval "$grep" 4>&-; echo $? >&4) 3>&- |
+ LC_ALL=C sed "$sed_script" >&3 4>&-
+ ) || {
+ sed_status=$?
+ test "$sed_status" -lt 2 && sed_status=2
+ test "$r" -lt "$sed_status" && r=$sed_status
+ }
+ exit $r
+ fi >&3 5>&-
+ )
+ r=$?
+
+ # If grep or sed or other non-decompression command failed with a signal,
+ # exit immediately and ignore the possible remaining files.
+ #
+ # NOTE: Instead of 128 + signal_number, some shells use
+ # 256 + signal_number (ksh) or 384 + signal_number (yash).
+ # This is fine for us since their "exit" and "kill -l" commands take
+ # this into account. (At least the versions I tried do but there is
+ # a report of an old ksh variant whose "exit" truncates the exit status
+ # to 8 bits without any special handling for values indicating a signal.)
+ test "$r" -ge 128 && exit "$r"
+
+ if test -z "$xz_status"; then
+ # Something unusual happened, for example, we got a signal and
+ # the exit status of the decompressor was never echoed and thus
+ # $xz_status is empty. Exit immediately and ignore the possible
+ # remaining files.
+ exit 2
+ elif test "$xz_status" -ge 128; then
+ # The decompressor died due to a signal. SIGPIPE is ignored since it can
+ # occur if grep exits before the whole file has been decompressed (grep -q
+ # can do that). If the decompressor died with some other signal, exit
+ # immediately and ignore the possible remaining files.
+ test "$(kill -l "$xz_status" 2> /dev/null)" != "PIPE" && exit "$xz_status"
+ elif test "$xz_status" -gt 0; then
+ # Decompression failed but we will continue with the remaining
+ # files anwyway. Set exit status to at least 2 to indicate an error.
+ test "$r" -lt 2 && r=2
+ fi
+
+ # Since res=1 is the initial value, we only need to care about
+ # matches (r == 0) and errors (r >= 2) here; r == 1 can be ignored.
+ if test "$r" -ge 2; then
+ # An error occurred in decompressor, grep, or some other command. Update
+ # res unless a larger error code has been seen with an earlier file.
+ test "$res" -lt "$r" && res=$r
+ elif test "$r" -eq 0; then
+ # grep found a match and no errors occurred. Update res if no errors have
+ # occurred with earlier files.
+ test "$res" -eq 1 && res=0
+ fi
+done
+
+# 0: At least one file matched and no errors occurred.
+# 1: No matches were found and no errors occurred.
+# >=2: Error. It's unknown if matches were found.
+exit "$res"
diff --git a/src/scripts/xzless.1 b/src/scripts/xzless.1
new file mode 100644
index 0000000..2d05459
--- /dev/null
+++ b/src/scripts/xzless.1
@@ -0,0 +1,69 @@
+.\"
+.\" Authors: Andrew Dudman
+.\" Lasse Collin
+.\"
+.\" This file has been put into the public domain.
+.\" You can do whatever you want with this file.
+.\"
+.\" (Note that this file is not based on gzip's zless.1.)
+.\"
+.TH XZLESS 1 "2010-09-27" "Tukaani" "XZ Utils"
+.SH NAME
+xzless, lzless \- view xz or lzma compressed (text) files
+.SH SYNOPSIS
+.B xzless
+.RI [ file ...]
+.br
+.B lzless
+.RI [ file ...]
+.SH DESCRIPTION
+.B xzless
+is a filter that displays text from compressed files to a terminal.
+It works on files compressed with
+.BR xz (1)
+or
+.BR lzma (1).
+If no
+.I files
+are given,
+.B xzless
+reads from standard input.
+.PP
+.B xzless
+uses
+.BR less (1)
+to present its output.
+Unlike
+.BR xzmore ,
+its choice of pager cannot be altered by
+setting an environment variable.
+Commands are based on both
+.BR more (1)
+and
+.BR vi (1)
+and allow back and forth movement and searching.
+See the
+.BR less (1)
+manual for more information.
+.PP
+The command named
+.B lzless
+is provided for backward compatibility with LZMA Utils.
+.SH ENVIRONMENT
+.TP
+.B LESSMETACHARS
+A list of characters special to the shell.
+Set by
+.B xzless
+unless it is already set in the environment.
+.TP
+.B LESSOPEN
+Set to a command line to invoke the
+.BR xz (1)
+decompressor for preprocessing the input files to
+.BR less (1).
+.SH "SEE ALSO"
+.BR less (1),
+.BR xz (1),
+.BR xzmore (1),
+.BR zless (1)
diff --git a/src/scripts/xzless.in b/src/scripts/xzless.in
new file mode 100644
index 0000000..79a849e
--- /dev/null
+++ b/src/scripts/xzless.in
@@ -0,0 +1,59 @@
+#!@POSIX_SHELL@
+
+# Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
+
+# The original version for gzip was written by Paul Eggert.
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+@enable_path_for_scripts@
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT.
+xz='@xz@ --format=auto'
+
+version='xzless (@PACKAGE_NAME@) @VERSION@'
+
+usage="Usage: ${0##*/} [OPTION]... [FILE]...
+Like 'less', but operate on the uncompressed contents of xz compressed FILEs.
+
+Options are the same as for 'less'.
+
+Report bugs to <@PACKAGE_BUGREPORT@>."
+
+case $1 in
+ --help) printf '%s\n' "$usage" || exit 2; exit;;
+ --version) printf '%s\n' "$version" || exit 2; exit;;
+esac
+
+if test "${LESSMETACHARS+set}" != set; then
+ # Work around a bug in less 394 and earlier;
+ # it mishandles the metacharacters '$%=~'.
+ space=' '
+ tab=' '
+ nl='
+'
+ LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~'
+fi
+
+if test "$(less -V | { read _ ver _ && echo ${ver%%.*}; })" -ge 429; then
+ # less 429 or later: LESSOPEN pipe will be used on
+ # standard input if $LESSOPEN begins with |-.
+ LESSOPEN="|-$xz -cdfqQ -- %s"
+else
+ LESSOPEN="|$xz -cdfqQ -- %s"
+fi
+export LESSMETACHARS LESSOPEN
+
+exec less "$@"
diff --git a/src/scripts/xzmore.1 b/src/scripts/xzmore.1
new file mode 100644
index 0000000..9613974
--- /dev/null
+++ b/src/scripts/xzmore.1
@@ -0,0 +1,55 @@
+.\"
+.\" Original zdiff.1 for gzip: Jean-loup Gailly
+.\" Modifications for XZ Utils: Lasse Collin
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZMORE 1 "2013-06-30" "Tukaani" "XZ Utils"
+.SH NAME
+xzmore, lzmore \- view xz or lzma compressed (text) files
+.SH SYNOPSIS
+.B xzmore
+.RI [ file... ]
+.br
+.B lzmore
+.RI [ file... ]
+.SH DESCRIPTION
+.B xzmore
+is a filter which allows examination of
+.BR xz (1)
+or
+.BR lzma (1)
+compressed text files one screenful at a time
+on a soft-copy terminal.
+.PP
+To use a pager other than the default
+.B more,
+set environment variable
+.B PAGER
+to the name of the desired program.
+The name
+.B lzmore
+is provided for backward compatibility with LZMA Utils.
+.TP
+.BR e " or " q
+When the prompt \-\-More\-\-(Next file:
+.IR file )
+is printed, this command causes
+.B xzmore
+to exit.
+.TP
+.B s
+When the prompt \-\-More\-\-(Next file:
+.IR file )
+is printed, this command causes
+.B xzmore
+to skip the next file and continue.
+.PP
+For list of keyboard commands supported while actually viewing the
+content of a file, refer to manual of the pager you use, usually
+.BR more (1).
+.SH "SEE ALSO"
+.BR more (1),
+.BR xz (1),
+.BR xzless (1),
+.BR zmore (1)
diff --git a/src/scripts/xzmore.in b/src/scripts/xzmore.in
new file mode 100644
index 0000000..5188fda
--- /dev/null
+++ b/src/scripts/xzmore.in
@@ -0,0 +1,79 @@
+#!@POSIX_SHELL@
+
+# Copyright (C) 2001, 2002, 2007 Free Software Foundation
+# Copyright (C) 1992, 1993 Jean-loup Gailly
+
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+@enable_path_for_scripts@
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT.
+xz='@xz@ --format=auto'
+
+version='xzmore (@PACKAGE_NAME@) @VERSION@'
+
+usage="Usage: ${0##*/} [OPTION]... [FILE]...
+Like 'more', but operate on the uncompressed contents of xz compressed FILEs.
+
+Report bugs to <@PACKAGE_BUGREPORT@>."
+
+case $1 in
+ --help) printf '%s\n' "$usage" || exit 2; exit;;
+ --version) printf '%s\n' "$version" || exit 2; exit;;
+esac
+
+oldtty=`stty -g 2>/dev/null`
+if stty -cbreak 2>/dev/null; then
+ cb='cbreak'; ncb='-cbreak'
+else
+ # 'stty min 1' resets eof to ^a on both SunOS and SysV!
+ cb='min 1 -icanon'; ncb='icanon eof ^d'
+fi
+if test $? -eq 0 && test -n "$oldtty"; then
+ trap 'stty $oldtty 2>/dev/null; exit' 0 2 3 5 10 13 15
+else
+ trap 'stty $ncb echo 2>/dev/null; exit' 0 2 3 5 10 13 15
+fi
+
+if test $# = 0; then
+ if test -t 0; then
+ printf '%s\n' "$usage"; exit 1
+ else
+ $xz -cdfqQ | eval "${PAGER:-more}"
+ fi
+else
+ FIRST=1
+ for FILE; do
+ < "$FILE" || continue
+ if test $FIRST -eq 0; then
+ printf "%s--More--(Next file: %s)" "" "$FILE"
+ stty $cb -echo 2>/dev/null
+ ANS=`dd bs=1 count=1 2>/dev/null`
+ stty $ncb echo 2>/dev/null
+ echo " "
+ case "$ANS" in
+ [eq]) exit;;
+ esac
+ fi
+ if test "$ANS" != 's'; then
+ printf '%s\n' "------> $FILE <------"
+ $xz -cdfqQ -- "$FILE" | eval "${PAGER:-more}"
+ fi
+ if test -t 1; then
+ FIRST=0
+ fi
+ done
+fi
diff --git a/src/xz/Makefile.am b/src/xz/Makefile.am
new file mode 100644
index 0000000..4bc64f3
--- /dev/null
+++ b/src/xz/Makefile.am
@@ -0,0 +1,133 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+bin_PROGRAMS = xz
+
+xz_SOURCES = \
+ args.c \
+ args.h \
+ coder.c \
+ coder.h \
+ file_io.c \
+ file_io.h \
+ hardware.c \
+ hardware.h \
+ main.c \
+ main.h \
+ message.c \
+ message.h \
+ mytime.c \
+ mytime.h \
+ options.c \
+ options.h \
+ private.h \
+ signals.c \
+ signals.h \
+ suffix.c \
+ suffix.h \
+ util.c \
+ util.h \
+ ../common/tuklib_open_stdxxx.c \
+ ../common/tuklib_progname.c \
+ ../common/tuklib_exit.c \
+ ../common/tuklib_mbstr_width.c \
+ ../common/tuklib_mbstr_fw.c
+
+if COND_MAIN_DECODER
+xz_SOURCES += \
+ list.c \
+ list.h
+endif
+
+if COND_W32
+xz_SOURCES += xz_w32res.rc
+endif
+
+xz_CPPFLAGS = \
+ -DLOCALEDIR=\"$(localedir)\" \
+ -I$(top_srcdir)/src/common \
+ -I$(top_srcdir)/src/liblzma/api \
+ -I$(top_builddir)/lib
+
+xz_LDADD = $(top_builddir)/src/liblzma/liblzma.la $(CAPSICUM_LIB)
+
+if COND_GNULIB
+xz_LDADD += $(top_builddir)/lib/libgnu.a
+endif
+
+# libgnu.a may need these libs, so this must be after libgnu.a.
+xz_LDADD += $(LTLIBINTL)
+
+
+# Windows resource compiler support
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(xz_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
+
+
+dist_man_MANS = xz.1
+
+
+## Create symlinks for unxz and xzcat for convenience. Create symlinks also
+## for lzma, unlzma, and lzcat for compatibility with LZMA Utils 4.32.x.
+xzlinks = unxz xzcat
+
+if COND_LZMALINKS
+xzlinks += lzma unlzma lzcat
+endif
+
+install-exec-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ target=`echo xz | sed '$(transform)'`$(EXEEXT) && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'`$(LN_EXEEXT) && \
+ rm -f "$$link" && \
+ $(LN_S) "$$target" "$$link"; \
+ done
+
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+install-data-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ target=`echo xz | sed '$(transform)'` && \
+ for lang in . $$languages; do \
+ man="$(top_srcdir)/po4a/man/$$lang/xz.1" ; \
+ if test -f "$$man"; then \
+ $(MAKE) dist_man_MANS="$$man" man_MANS= \
+ mandir="$(mandir)/$$lang" install-man; \
+ fi; \
+ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+ if test -f "$$man1dir/$$target.1"; then ( \
+ cd "$$man1dir" && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'` && \
+ rm -f "$$link.1" && \
+ $(LN_S) "$$target.1" "$$link.1"; \
+ done \
+ ); fi; \
+ done
+
+uninstall-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'`$(LN_EXEEXT) && \
+ rm -f "$$link"; \
+ done
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in . $$languages; do \
+ for name in xz $(xzlinks); do \
+ name=`echo $$name | sed '$(transform)'` && \
+ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$name.1"; \
+ done; \
+ done
diff --git a/src/xz/Makefile.in b/src/xz/Makefile.in
new file mode 100644
index 0000000..e6422c5
--- /dev/null
+++ b/src/xz/Makefile.in
@@ -0,0 +1,1162 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
+ true; \
+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+ true; \
+ else \
+ false; \
+ fi; \
+}
+am__make_running_with_option = \
+ case $${target_option-} in \
+ ?) ;; \
+ *) echo "am__make_running_with_option: internal error: invalid" \
+ "target option '$${target_option-}' specified" >&2; \
+ exit 1;; \
+ esac; \
+ has_opt=no; \
+ sane_makeflags=$$MAKEFLAGS; \
+ if $(am__is_gnu_make); then \
+ sane_makeflags=$$MFLAGS; \
+ else \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ bs=\\; \
+ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
+ esac; \
+ fi; \
+ skip_next=no; \
+ strip_trailopt () \
+ { \
+ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+ }; \
+ for flg in $$sane_makeflags; do \
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+ echo " $(INSTALL_DATA) $$files '$(DESTDIR)$(man1dir)'"; \
+ $(INSTALL_DATA) $$files "$(DESTDIR)$(man1dir)" || exit $$?; }; \
+ done; }
+
+uninstall-man1:
+ @$(NORMAL_UNINSTALL)
+ @list=''; test -n "$(man1dir)" || exit 0; \
+ files=`{ for i in $$list; do echo "$$i"; done; \
+ l2='$(dist_man_MANS)'; for i in $$l2; do echo "$$i"; done | \
+ sed -n '/\.1[a-z]*$$/p'; \
+ } | sed -e 's,.*/,,;h;s,.*\.,,;s,^[^1][0-9a-z]*$$,1,;x' \
+ -e 's,\.[0-9a-z]*$$,,;$(transform);G;s,\n,.,'`; \
+ dir='$(DESTDIR)$(man1dir)'; $(am__uninstall_files_from_dir)
+
+ID: $(am__tagged_files)
+ $(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+ set x; \
+ here=`pwd`; \
+ $(am__define_uniq_tagged_files); \
+ shift; \
+ if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+ test -n "$$unique" || unique=$$empty_fix; \
+ if test $$# -gt 0; then \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ "$$@" $$unique; \
+ else \
+ $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+ $$unique; \
+ fi; \
+ fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+ $(am__define_uniq_tagged_files); \
+ test -z "$(CTAGS_ARGS)$$unique" \
+ || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+ $$unique
+
+GTAGS:
+ here=`$(am__cd) $(top_builddir) && pwd` \
+ && $(am__cd) $(top_srcdir) \
+ && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+ list='$(am__tagged_files)'; \
+ case "$(srcdir)" in \
+ [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+ *) sdir=$(subdir)/$(srcdir) ;; \
+ esac; \
+ for i in $$list; do \
+ if test -f "$$i"; then \
+ echo "$(subdir)/$$i"; \
+ else \
+ echo "$$sdir/$$i"; \
+ fi; \
+ done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+ -rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+ @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+ list='$(DISTFILES)'; \
+ dist_files=`for file in $$list; do echo $$file; done | \
+ sed -e "s|^$$srcdirstrip/||;t" \
+ -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+ case $$dist_files in \
+ */*) $(MKDIR_P) `echo "$$dist_files" | \
+ sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+ sort -u` ;; \
+ esac; \
+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+ if test -d $$d/$$file; then \
+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+ if test -d "$(distdir)/$$file"; then \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+ cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+ fi; \
+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+ else \
+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
+ || exit 1; \
+ fi; \
+ done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS) $(MANS)
+installdirs:
+ for dir in "$(DESTDIR)$(bindir)" "$(DESTDIR)$(man1dir)"; do \
+ test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+ done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+ if test -z '$(STRIP)'; then \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ install; \
+ else \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+ -rm -f ./$(DEPDIR)/xz-args.Po
+ -rm -f ./$(DEPDIR)/xz-coder.Po
+ -rm -f ./$(DEPDIR)/xz-file_io.Po
+ -rm -f ./$(DEPDIR)/xz-hardware.Po
+ -rm -f ./$(DEPDIR)/xz-list.Po
+ -rm -f ./$(DEPDIR)/xz-main.Po
+ -rm -f ./$(DEPDIR)/xz-message.Po
+ -rm -f ./$(DEPDIR)/xz-mytime.Po
+ -rm -f ./$(DEPDIR)/xz-options.Po
+ -rm -f ./$(DEPDIR)/xz-signals.Po
+ -rm -f ./$(DEPDIR)/xz-suffix.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_mbstr_fw.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_mbstr_width.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_open_stdxxx.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/xz-util.Po
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) install-data-hook
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) install-exec-hook
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man1
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -f ./$(DEPDIR)/xz-args.Po
+ -rm -f ./$(DEPDIR)/xz-coder.Po
+ -rm -f ./$(DEPDIR)/xz-file_io.Po
+ -rm -f ./$(DEPDIR)/xz-hardware.Po
+ -rm -f ./$(DEPDIR)/xz-list.Po
+ -rm -f ./$(DEPDIR)/xz-main.Po
+ -rm -f ./$(DEPDIR)/xz-message.Po
+ -rm -f ./$(DEPDIR)/xz-mytime.Po
+ -rm -f ./$(DEPDIR)/xz-options.Po
+ -rm -f ./$(DEPDIR)/xz-signals.Po
+ -rm -f ./$(DEPDIR)/xz-suffix.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_mbstr_fw.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_mbstr_width.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_open_stdxxx.Po
+ -rm -f ./$(DEPDIR)/xz-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/xz-util.Po
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS uninstall-man
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) uninstall-hook
+uninstall-man: uninstall-man1
+
+.MAKE: install-am install-data-am install-exec-am install-strip \
+ uninstall-am
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+ clean-binPROGRAMS clean-generic clean-libtool cscopelist-am \
+ ctags ctags-am distclean distclean-compile distclean-generic \
+ distclean-libtool distclean-tags distdir dvi dvi-am html \
+ html-am info info-am install install-am install-binPROGRAMS \
+ install-data install-data-am install-data-hook install-dvi \
+ install-dvi-am install-exec install-exec-am install-exec-hook \
+ install-html install-html-am install-info install-info-am \
+ install-man install-man1 install-pdf install-pdf-am install-ps \
+ install-ps-am install-strip installcheck installcheck-am \
+ installdirs maintainer-clean maintainer-clean-generic \
+ mostlyclean mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+ uninstall-am uninstall-binPROGRAMS uninstall-hook \
+ uninstall-man uninstall-man1
+
+.PRECIOUS: Makefile
+
+
+# Windows resource compiler support
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(xz_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
+
+install-exec-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ target=`echo xz | sed '$(transform)'`$(EXEEXT) && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'`$(LN_EXEEXT) && \
+ rm -f "$$link" && \
+ $(LN_S) "$$target" "$$link"; \
+ done
+
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+install-data-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ target=`echo xz | sed '$(transform)'` && \
+ for lang in . $$languages; do \
+ man="$(top_srcdir)/po4a/man/$$lang/xz.1" ; \
+ if test -f "$$man"; then \
+ $(MAKE) dist_man_MANS="$$man" man_MANS= \
+ mandir="$(mandir)/$$lang" install-man; \
+ fi; \
+ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+ if test -f "$$man1dir/$$target.1"; then ( \
+ cd "$$man1dir" && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'` && \
+ rm -f "$$link.1" && \
+ $(LN_S) "$$target.1" "$$link.1"; \
+ done \
+ ); fi; \
+ done
+
+uninstall-hook:
+ cd "$(DESTDIR)$(bindir)" && \
+ for name in $(xzlinks); do \
+ link=`echo $$name | sed '$(transform)'`$(LN_EXEEXT) && \
+ rm -f "$$link"; \
+ done
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in . $$languages; do \
+ for name in xz $(xzlinks); do \
+ name=`echo $$name | sed '$(transform)'` && \
+ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$name.1"; \
+ done; \
+ done
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/xz/args.c b/src/xz/args.c
new file mode 100644
index 0000000..17e778c
--- /dev/null
+++ b/src/xz/args.c
@@ -0,0 +1,763 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file args.c
+/// \brief Argument parsing
+///
+/// \note Filter-specific options parsing is in options.c.
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+#include "getopt.h"
+#include <ctype.h>
+
+
+bool opt_stdout = false;
+bool opt_force = false;
+bool opt_keep_original = false;
+bool opt_robot = false;
+bool opt_ignore_check = false;
+
+// We don't modify or free() this, but we need to assign it in some
+// non-const pointers.
+const char stdin_filename[] = "(stdin)";
+
+
+/// Parse and set the memory usage limit for compression, decompression,
+/// and/or multithreaded decompression.
+static void
+parse_memlimit(const char *name, const char *name_percentage, const char *str,
+ bool set_compress, bool set_decompress, bool set_mtdec)
+{
+ bool is_percentage = false;
+ uint64_t value;
+
+ const size_t len = strlen(str);
+ if (len > 0 && str[len - 1] == '%') {
+ // Make a copy so that we can get rid of %.
+ //
+ // In the past str wasn't const and we modified it directly
+ // but that modified argv[] and thus affected what was visible
+ // in "ps auxf" or similar tools which was confusing. For
+ // example, --memlimit=50% would show up as --memlimit=50
+ // since the percent sign was overwritten here.
+ char *s = xstrdup(str);
+ s[len - 1] = '\0';
+ is_percentage = true;
+ value = str_to_uint64(name_percentage, s, 1, 100);
+ free(s);
+ } else {
+ // On 32-bit systems, SIZE_MAX would make more sense than
+ // UINT64_MAX. But use UINT64_MAX still so that scripts
+ // that assume > 4 GiB values don't break.
+ value = str_to_uint64(name, str, 0, UINT64_MAX);
+ }
+
+ hardware_memlimit_set(value, set_compress, set_decompress, set_mtdec,
+ is_percentage);
+ return;
+}
+
+
+static void
+parse_block_list(const char *str_const)
+{
+ // We need a modifiable string in the for-loop.
+ char *str_start = xstrdup(str_const);
+ char *str = str_start;
+
+ // It must be non-empty and not begin with a comma.
+ if (str[0] == '\0' || str[0] == ',')
+ message_fatal(_("%s: Invalid argument to --block-list"), str);
+
+ // Count the number of comma-separated strings.
+ size_t count = 1;
+ for (size_t i = 0; str[i] != '\0'; ++i)
+ if (str[i] == ',')
+ ++count;
+
+ // Prevent an unlikely integer overflow.
+ if (count > SIZE_MAX / sizeof(uint64_t) - 1)
+ message_fatal(_("%s: Too many arguments to --block-list"),
+ str);
+
+ // Allocate memory to hold all the sizes specified.
+ // If --block-list was specified already, its value is forgotten.
+ free(opt_block_list);
+ opt_block_list = xmalloc((count + 1) * sizeof(uint64_t));
+
+ for (size_t i = 0; i < count; ++i) {
+ // Locate the next comma and replace it with \0.
+ char *p = strchr(str, ',');
+ if (p != NULL)
+ *p = '\0';
+
+ if (str[0] == '\0') {
+ // There is no string, that is, a comma follows
+ // another comma. Use the previous value.
+ //
+ // NOTE: We checked earlier that the first char
+ // of the whole list cannot be a comma.
+ assert(i > 0);
+ opt_block_list[i] = opt_block_list[i - 1];
+ } else {
+ opt_block_list[i] = str_to_uint64("block-list", str,
+ 0, UINT64_MAX);
+
+ // Zero indicates no more new Blocks.
+ if (opt_block_list[i] == 0) {
+ if (i + 1 != count)
+ message_fatal(_("0 can only be used "
+ "as the last element "
+ "in --block-list"));
+
+ opt_block_list[i] = UINT64_MAX;
+ }
+ }
+
+ str = p + 1;
+ }
+
+ // Terminate the array.
+ opt_block_list[count] = 0;
+
+ free(str_start);
+ return;
+}
+
+
+static void
+parse_real(args_info *args, int argc, char **argv)
+{
+ enum {
+ OPT_X86 = INT_MIN,
+ OPT_POWERPC,
+ OPT_IA64,
+ OPT_ARM,
+ OPT_ARMTHUMB,
+ OPT_ARM64,
+ OPT_SPARC,
+ OPT_DELTA,
+ OPT_LZMA1,
+ OPT_LZMA2,
+
+ OPT_SINGLE_STREAM,
+ OPT_NO_SPARSE,
+ OPT_FILES,
+ OPT_FILES0,
+ OPT_BLOCK_SIZE,
+ OPT_BLOCK_LIST,
+ OPT_MEM_COMPRESS,
+ OPT_MEM_DECOMPRESS,
+ OPT_MEM_MT_DECOMPRESS,
+ OPT_NO_ADJUST,
+ OPT_INFO_MEMORY,
+ OPT_ROBOT,
+ OPT_FLUSH_TIMEOUT,
+ OPT_IGNORE_CHECK,
+ };
+
+ static const char short_opts[]
+ = "cC:defF:hHlkM:qQrS:tT:vVz0123456789";
+
+ static const struct option long_opts[] = {
+ // Operation mode
+ { "compress", no_argument, NULL, 'z' },
+ { "decompress", no_argument, NULL, 'd' },
+ { "uncompress", no_argument, NULL, 'd' },
+ { "test", no_argument, NULL, 't' },
+ { "list", no_argument, NULL, 'l' },
+
+ // Operation modifiers
+ { "keep", no_argument, NULL, 'k' },
+ { "force", no_argument, NULL, 'f' },
+ { "stdout", no_argument, NULL, 'c' },
+ { "to-stdout", no_argument, NULL, 'c' },
+ { "single-stream", no_argument, NULL, OPT_SINGLE_STREAM },
+ { "no-sparse", no_argument, NULL, OPT_NO_SPARSE },
+ { "suffix", required_argument, NULL, 'S' },
+ // { "recursive", no_argument, NULL, 'r' }, // TODO
+ { "files", optional_argument, NULL, OPT_FILES },
+ { "files0", optional_argument, NULL, OPT_FILES0 },
+
+ // Basic compression settings
+ { "format", required_argument, NULL, 'F' },
+ { "check", required_argument, NULL, 'C' },
+ { "ignore-check", no_argument, NULL, OPT_IGNORE_CHECK },
+ { "block-size", required_argument, NULL, OPT_BLOCK_SIZE },
+ { "block-list", required_argument, NULL, OPT_BLOCK_LIST },
+ { "memlimit-compress", required_argument, NULL, OPT_MEM_COMPRESS },
+ { "memlimit-decompress", required_argument, NULL, OPT_MEM_DECOMPRESS },
+ { "memlimit-mt-decompress", required_argument, NULL, OPT_MEM_MT_DECOMPRESS },
+ { "memlimit", required_argument, NULL, 'M' },
+ { "memory", required_argument, NULL, 'M' }, // Old alias
+ { "no-adjust", no_argument, NULL, OPT_NO_ADJUST },
+ { "threads", required_argument, NULL, 'T' },
+ { "flush-timeout", required_argument, NULL, OPT_FLUSH_TIMEOUT },
+
+ { "extreme", no_argument, NULL, 'e' },
+ { "fast", no_argument, NULL, '0' },
+ { "best", no_argument, NULL, '9' },
+
+ // Filters
+ { "lzma1", optional_argument, NULL, OPT_LZMA1 },
+ { "lzma2", optional_argument, NULL, OPT_LZMA2 },
+ { "x86", optional_argument, NULL, OPT_X86 },
+ { "powerpc", optional_argument, NULL, OPT_POWERPC },
+ { "ia64", optional_argument, NULL, OPT_IA64 },
+ { "arm", optional_argument, NULL, OPT_ARM },
+ { "armthumb", optional_argument, NULL, OPT_ARMTHUMB },
+ { "arm64", optional_argument, NULL, OPT_ARM64 },
+ { "sparc", optional_argument, NULL, OPT_SPARC },
+ { "delta", optional_argument, NULL, OPT_DELTA },
+
+ // Other options
+ { "quiet", no_argument, NULL, 'q' },
+ { "verbose", no_argument, NULL, 'v' },
+ { "no-warn", no_argument, NULL, 'Q' },
+ { "robot", no_argument, NULL, OPT_ROBOT },
+ { "info-memory", no_argument, NULL, OPT_INFO_MEMORY },
+ { "help", no_argument, NULL, 'h' },
+ { "long-help", no_argument, NULL, 'H' },
+ { "version", no_argument, NULL, 'V' },
+
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL))
+ != -1) {
+ switch (c) {
+ // Compression preset (also for decompression if --format=raw)
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ coder_set_preset((uint32_t)(c - '0'));
+ break;
+
+ // --memlimit-compress
+ case OPT_MEM_COMPRESS:
+ parse_memlimit("memlimit-compress",
+ "memlimit-compress%", optarg,
+ true, false, false);
+ break;
+
+ // --memlimit-decompress
+ case OPT_MEM_DECOMPRESS:
+ parse_memlimit("memlimit-decompress",
+ "memlimit-decompress%", optarg,
+ false, true, false);
+ break;
+
+ // --memlimit-mt-decompress
+ case OPT_MEM_MT_DECOMPRESS:
+ parse_memlimit("memlimit-mt-decompress",
+ "memlimit-mt-decompress%", optarg,
+ false, false, true);
+ break;
+
+ // --memlimit
+ case 'M':
+ parse_memlimit("memlimit", "memlimit%", optarg,
+ true, true, true);
+ break;
+
+ // --suffix
+ case 'S':
+ suffix_set(optarg);
+ break;
+
+ case 'T': {
+ // Since xz 5.4.0: Ignore leading '+' first.
+ const char *s = optarg;
+ if (optarg[0] == '+')
+ ++s;
+
+ // The max is from src/liblzma/common/common.h.
+ uint32_t t = str_to_uint64("threads", s, 0, 16384);
+
+ // If leading '+' was used then use multi-threaded
+ // mode even if exactly one thread was specified.
+ if (t == 1 && optarg[0] == '+')
+ t = UINT32_MAX;
+
+ hardware_threads_set(t);
+ break;
+ }
+
+ // --version
+ case 'V':
+ // This doesn't return.
+ message_version();
+
+ // --stdout
+ case 'c':
+ opt_stdout = true;
+ break;
+
+ // --decompress
+ case 'd':
+ opt_mode = MODE_DECOMPRESS;
+ break;
+
+ // --extreme
+ case 'e':
+ coder_set_extreme();
+ break;
+
+ // --force
+ case 'f':
+ opt_force = true;
+ break;
+
+ // --info-memory
+ case OPT_INFO_MEMORY:
+ // This doesn't return.
+ hardware_memlimit_show();
+
+ // --help
+ case 'h':
+ // This doesn't return.
+ message_help(false);
+
+ // --long-help
+ case 'H':
+ // This doesn't return.
+ message_help(true);
+
+ // --list
+ case 'l':
+ opt_mode = MODE_LIST;
+ break;
+
+ // --keep
+ case 'k':
+ opt_keep_original = true;
+ break;
+
+ // --quiet
+ case 'q':
+ message_verbosity_decrease();
+ break;
+
+ case 'Q':
+ set_exit_no_warn();
+ break;
+
+ case 't':
+ opt_mode = MODE_TEST;
+ break;
+
+ // --verbose
+ case 'v':
+ message_verbosity_increase();
+ break;
+
+ // --robot
+ case OPT_ROBOT:
+ opt_robot = true;
+
+ // This is to make sure that floating point numbers
+ // always have a dot as decimal separator.
+ setlocale(LC_NUMERIC, "C");
+ break;
+
+ case 'z':
+ opt_mode = MODE_COMPRESS;
+ break;
+
+ // Filter setup
+
+ case OPT_X86:
+ coder_add_filter(LZMA_FILTER_X86,
+ options_bcj(optarg));
+ break;
+
+ case OPT_POWERPC:
+ coder_add_filter(LZMA_FILTER_POWERPC,
+ options_bcj(optarg));
+ break;
+
+ case OPT_IA64:
+ coder_add_filter(LZMA_FILTER_IA64,
+ options_bcj(optarg));
+ break;
+
+ case OPT_ARM:
+ coder_add_filter(LZMA_FILTER_ARM,
+ options_bcj(optarg));
+ break;
+
+ case OPT_ARMTHUMB:
+ coder_add_filter(LZMA_FILTER_ARMTHUMB,
+ options_bcj(optarg));
+ break;
+
+ case OPT_ARM64:
+ coder_add_filter(LZMA_FILTER_ARM64,
+ options_bcj(optarg));
+ break;
+
+ case OPT_SPARC:
+ coder_add_filter(LZMA_FILTER_SPARC,
+ options_bcj(optarg));
+ break;
+
+ case OPT_DELTA:
+ coder_add_filter(LZMA_FILTER_DELTA,
+ options_delta(optarg));
+ break;
+
+ case OPT_LZMA1:
+ coder_add_filter(LZMA_FILTER_LZMA1,
+ options_lzma(optarg));
+ break;
+
+ case OPT_LZMA2:
+ coder_add_filter(LZMA_FILTER_LZMA2,
+ options_lzma(optarg));
+ break;
+
+ // Other
+
+ // --format
+ case 'F': {
+ // Just in case, support both "lzma" and "alone" since
+ // the latter was used for forward compatibility in
+ // LZMA Utils 4.32.x.
+ static const struct {
+ char str[8];
+ enum format_type format;
+ } types[] = {
+ { "auto", FORMAT_AUTO },
+ { "xz", FORMAT_XZ },
+ { "lzma", FORMAT_LZMA },
+ { "alone", FORMAT_LZMA },
+#ifdef HAVE_LZIP_DECODER
+ { "lzip", FORMAT_LZIP },
+#endif
+ { "raw", FORMAT_RAW },
+ };
+
+ size_t i = 0;
+ while (strcmp(types[i].str, optarg) != 0)
+ if (++i == ARRAY_SIZE(types))
+ message_fatal(_("%s: Unknown file "
+ "format type"),
+ optarg);
+
+ opt_format = types[i].format;
+ break;
+ }
+
+ // --check
+ case 'C': {
+ static const struct {
+ char str[8];
+ lzma_check check;
+ } types[] = {
+ { "none", LZMA_CHECK_NONE },
+ { "crc32", LZMA_CHECK_CRC32 },
+ { "crc64", LZMA_CHECK_CRC64 },
+ { "sha256", LZMA_CHECK_SHA256 },
+ };
+
+ size_t i = 0;
+ while (strcmp(types[i].str, optarg) != 0) {
+ if (++i == ARRAY_SIZE(types))
+ message_fatal(_("%s: Unsupported "
+ "integrity "
+ "check type"), optarg);
+ }
+
+ // Use a separate check in case we are using different
+ // liblzma than what was used to compile us.
+ if (!lzma_check_is_supported(types[i].check))
+ message_fatal(_("%s: Unsupported integrity "
+ "check type"), optarg);
+
+ coder_set_check(types[i].check);
+ break;
+ }
+
+ case OPT_IGNORE_CHECK:
+ opt_ignore_check = true;
+ break;
+
+ case OPT_BLOCK_SIZE:
+ opt_block_size = str_to_uint64("block-size", optarg,
+ 0, LZMA_VLI_MAX);
+ break;
+
+ case OPT_BLOCK_LIST: {
+ parse_block_list(optarg);
+ break;
+ }
+
+ case OPT_SINGLE_STREAM:
+ opt_single_stream = true;
+ break;
+
+ case OPT_NO_SPARSE:
+ io_no_sparse();
+ break;
+
+ case OPT_FILES:
+ args->files_delim = '\n';
+
+ // Fall through
+
+ case OPT_FILES0:
+ if (args->files_name != NULL)
+ message_fatal(_("Only one file can be "
+ "specified with `--files' "
+ "or `--files0'."));
+
+ if (optarg == NULL) {
+ args->files_name = stdin_filename;
+ args->files_file = stdin;
+ } else {
+ args->files_name = optarg;
+ args->files_file = fopen(optarg,
+ c == OPT_FILES ? "r" : "rb");
+ if (args->files_file == NULL)
+ // TRANSLATORS: This is a translatable
+ // string because French needs a space
+ // before the colon ("%s : %s").
+ message_fatal(_("%s: %s"), optarg,
+ strerror(errno));
+ }
+
+ break;
+
+ case OPT_NO_ADJUST:
+ opt_auto_adjust = false;
+ break;
+
+ case OPT_FLUSH_TIMEOUT:
+ opt_flush_timeout = str_to_uint64("flush-timeout",
+ optarg, 0, UINT64_MAX);
+ break;
+
+ default:
+ message_try_help();
+ tuklib_exit(E_ERROR, E_ERROR, false);
+ }
+ }
+
+ return;
+}
+
+
+static void
+parse_environment(args_info *args, char *argv0, const char *varname)
+{
+ char *env = getenv(varname);
+ if (env == NULL)
+ return;
+
+ // We modify the string, so make a copy of it.
+ env = xstrdup(env);
+
+ // Calculate the number of arguments in env. argc stats at one
+ // to include space for the program name.
+ int argc = 1;
+ bool prev_was_space = true;
+ for (size_t i = 0; env[i] != '\0'; ++i) {
+ // NOTE: Cast to unsigned char is needed so that correct
+ // value gets passed to isspace(), which expects
+ // unsigned char cast to int. Casting to int is done
+ // automatically due to integer promotion, but we need to
+ // force char to unsigned char manually. Otherwise 8-bit
+ // characters would get promoted to wrong value if
+ // char is signed.
+ if (isspace((unsigned char)env[i])) {
+ prev_was_space = true;
+ } else if (prev_was_space) {
+ prev_was_space = false;
+
+ // Keep argc small enough to fit into a signed int
+ // and to keep it usable for memory allocation.
+ if (++argc == my_min(
+ INT_MAX, SIZE_MAX / sizeof(char *)))
+ message_fatal(_("The environment variable "
+ "%s contains too many "
+ "arguments"), varname);
+ }
+ }
+
+ // Allocate memory to hold pointers to the arguments. Add one to get
+ // space for the terminating NULL (if some systems happen to need it).
+ char **argv = xmalloc(((size_t)(argc) + 1) * sizeof(char *));
+ argv[0] = argv0;
+ argv[argc] = NULL;
+
+ // Go through the string again. Split the arguments using '\0'
+ // characters and add pointers to the resulting strings to argv.
+ argc = 1;
+ prev_was_space = true;
+ for (size_t i = 0; env[i] != '\0'; ++i) {
+ if (isspace((unsigned char)env[i])) {
+ prev_was_space = true;
+ env[i] = '\0';
+ } else if (prev_was_space) {
+ prev_was_space = false;
+ argv[argc++] = env + i;
+ }
+ }
+
+ // Parse the argument list we got from the environment. All non-option
+ // arguments i.e. filenames are ignored.
+ parse_real(args, argc, argv);
+
+ // Reset the state of the getopt_long() so that we can parse the
+ // command line options too. There are two incompatible ways to
+ // do it.
+#ifdef HAVE_OPTRESET
+ // BSD
+ optind = 1;
+ optreset = 1;
+#else
+ // GNU, Solaris
+ optind = 0;
+#endif
+
+ // We don't need the argument list from environment anymore.
+ free(argv);
+ free(env);
+
+ return;
+}
+
+
+extern void
+args_parse(args_info *args, int argc, char **argv)
+{
+ // Initialize those parts of *args that we need later.
+ args->files_name = NULL;
+ args->files_file = NULL;
+ args->files_delim = '\0';
+
+ // Check how we were called.
+ {
+ // Remove the leading path name, if any.
+ const char *name = strrchr(argv[0], '/');
+ if (name == NULL)
+ name = argv[0];
+ else
+ ++name;
+
+ // NOTE: It's possible that name[0] is now '\0' if argv[0]
+ // is weird, but it doesn't matter here.
+
+ // Look for full command names instead of substrings like
+ // "un", "cat", and "lz" to reduce possibility of false
+ // positives when the programs have been renamed.
+ if (strstr(name, "xzcat") != NULL) {
+ opt_mode = MODE_DECOMPRESS;
+ opt_stdout = true;
+ } else if (strstr(name, "unxz") != NULL) {
+ opt_mode = MODE_DECOMPRESS;
+ } else if (strstr(name, "lzcat") != NULL) {
+ opt_format = FORMAT_LZMA;
+ opt_mode = MODE_DECOMPRESS;
+ opt_stdout = true;
+ } else if (strstr(name, "unlzma") != NULL) {
+ opt_format = FORMAT_LZMA;
+ opt_mode = MODE_DECOMPRESS;
+ } else if (strstr(name, "lzma") != NULL) {
+ opt_format = FORMAT_LZMA;
+ }
+ }
+
+ // First the flags from the environment
+ parse_environment(args, argv[0], "XZ_DEFAULTS");
+ parse_environment(args, argv[0], "XZ_OPT");
+
+ // Then from the command line
+ parse_real(args, argc, argv);
+
+ // If encoder or decoder support was omitted at build time,
+ // show an error now so that the rest of the code can rely on
+ // that whatever is in opt_mode is also supported.
+#ifndef HAVE_ENCODERS
+ if (opt_mode == MODE_COMPRESS)
+ message_fatal(_("Compression support was disabled "
+ "at build time"));
+#endif
+#ifndef HAVE_DECODERS
+ // Even MODE_LIST cannot work without decoder support so MODE_COMPRESS
+ // is the only valid choice.
+ if (opt_mode != MODE_COMPRESS)
+ message_fatal(_("Decompression support was disabled "
+ "at build time"));
+#endif
+
+#ifdef HAVE_LZIP_DECODER
+ if (opt_mode == MODE_COMPRESS && opt_format == FORMAT_LZIP)
+ message_fatal(_("Compression of lzip files (.lz) "
+ "is not supported"));
+#endif
+
+ // Never remove the source file when the destination is not on disk.
+ // In test mode the data is written nowhere, but setting opt_stdout
+ // will make the rest of the code behave well.
+ if (opt_stdout || opt_mode == MODE_TEST) {
+ opt_keep_original = true;
+ opt_stdout = true;
+ }
+
+ // When compressing, if no --format flag was used, or it
+ // was --format=auto, we compress to the .xz format.
+ if (opt_mode == MODE_COMPRESS && opt_format == FORMAT_AUTO)
+ opt_format = FORMAT_XZ;
+
+ // Compression settings need to be validated (options themselves and
+ // their memory usage) when compressing to any file format. It has to
+ // be done also when uncompressing raw data, since for raw decoding
+ // the options given on the command line are used to know what kind
+ // of raw data we are supposed to decode.
+ if (opt_mode == MODE_COMPRESS || (opt_format == FORMAT_RAW
+ && opt_mode != MODE_LIST))
+ coder_set_compression_settings();
+
+ // If raw format is used and a custom suffix is not provided,
+ // then only stdout mode can be used when compressing or decompressing.
+ if (opt_format == FORMAT_RAW && !suffix_is_set() && !opt_stdout
+ && (opt_mode == MODE_COMPRESS
+ || opt_mode == MODE_DECOMPRESS))
+ message_fatal(_("With --format=raw, --suffix=.SUF is "
+ "required unless writing to stdout"));
+
+ // If no filenames are given, use stdin.
+ if (argv[optind] == NULL && args->files_name == NULL) {
+ // We don't modify or free() the "-" constant. The caller
+ // modifies this so don't make the struct itself const.
+ static char *names_stdin[2] = { (char *)"-", NULL };
+ args->arg_names = names_stdin;
+ args->arg_count = 1;
+ } else {
+ // We got at least one filename from the command line, or
+ // --files or --files0 was specified.
+ args->arg_names = argv + optind;
+ args->arg_count = (unsigned int)(argc - optind);
+ }
+
+ return;
+}
+
+
+#ifndef NDEBUG
+extern void
+args_free(void)
+{
+ free(opt_block_list);
+ return;
+}
+#endif
diff --git a/src/xz/args.h b/src/xz/args.h
new file mode 100644
index 0000000..a1a5930
--- /dev/null
+++ b/src/xz/args.h
@@ -0,0 +1,44 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file args.h
+/// \brief Argument parsing
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+typedef struct {
+ /// Filenames from command line
+ char **arg_names;
+
+ /// Number of filenames from command line
+ unsigned int arg_count;
+
+ /// Name of the file from which to read filenames. This is NULL
+ /// if --files or --files0 was not used.
+ const char *files_name;
+
+ /// File opened for reading from which filenames are read. This is
+ /// non-NULL only if files_name is non-NULL.
+ FILE *files_file;
+
+ /// Delimiter for filenames read from files_file
+ char files_delim;
+
+} args_info;
+
+
+extern bool opt_stdout;
+extern bool opt_force;
+extern bool opt_keep_original;
+// extern bool opt_recursive;
+extern bool opt_robot;
+extern bool opt_ignore_check;
+
+extern const char stdin_filename[];
+
+extern void args_parse(args_info *args, int argc, char **argv);
+extern void args_free(void);
diff --git a/src/xz/coder.c b/src/xz/coder.c
new file mode 100644
index 0000000..91d40ed
--- /dev/null
+++ b/src/xz/coder.c
@@ -0,0 +1,1109 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file coder.c
+/// \brief Compresses or uncompresses a file
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+
+/// Return value type for coder_init().
+enum coder_init_ret {
+ CODER_INIT_NORMAL,
+ CODER_INIT_PASSTHRU,
+ CODER_INIT_ERROR,
+};
+
+
+enum operation_mode opt_mode = MODE_COMPRESS;
+enum format_type opt_format = FORMAT_AUTO;
+bool opt_auto_adjust = true;
+bool opt_single_stream = false;
+uint64_t opt_block_size = 0;
+uint64_t *opt_block_list = NULL;
+
+
+/// Stream used to communicate with liblzma
+static lzma_stream strm = LZMA_STREAM_INIT;
+
+/// Filters needed for all encoding all formats, and also decoding in raw data
+static lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+/// Input and output buffers
+static io_buf in_buf;
+static io_buf out_buf;
+
+/// Number of filters. Zero indicates that we are using a preset.
+static uint32_t filters_count = 0;
+
+/// Number of the preset (0-9)
+static uint32_t preset_number = LZMA_PRESET_DEFAULT;
+
+/// Integrity check type
+static lzma_check check;
+
+/// This becomes false if the --check=CHECK option is used.
+static bool check_default = true;
+
+/// Indicates if unconsumed input is allowed to remain after
+/// decoding has successfully finished. This is set for each file
+/// in coder_init().
+static bool allow_trailing_input;
+
+#ifdef MYTHREAD_ENABLED
+static lzma_mt mt_options = {
+ .flags = 0,
+ .timeout = 300,
+ .filters = filters,
+};
+#endif
+
+
+extern void
+coder_set_check(lzma_check new_check)
+{
+ check = new_check;
+ check_default = false;
+ return;
+}
+
+
+static void
+forget_filter_chain(void)
+{
+ // Setting a preset makes us forget a possibly defined custom
+ // filter chain.
+ while (filters_count > 0) {
+ --filters_count;
+ free(filters[filters_count].options);
+ filters[filters_count].options = NULL;
+ }
+
+ return;
+}
+
+
+extern void
+coder_set_preset(uint32_t new_preset)
+{
+ preset_number &= ~LZMA_PRESET_LEVEL_MASK;
+ preset_number |= new_preset;
+ forget_filter_chain();
+ return;
+}
+
+
+extern void
+coder_set_extreme(void)
+{
+ preset_number |= LZMA_PRESET_EXTREME;
+ forget_filter_chain();
+ return;
+}
+
+
+extern void
+coder_add_filter(lzma_vli id, void *options)
+{
+ if (filters_count == LZMA_FILTERS_MAX)
+ message_fatal(_("Maximum number of filters is four"));
+
+ filters[filters_count].id = id;
+ filters[filters_count].options = options;
+ ++filters_count;
+
+ // Setting a custom filter chain makes us forget the preset options.
+ // This makes a difference if one specifies e.g. "xz -9 --lzma2 -e"
+ // where the custom filter chain resets the preset level back to
+ // the default 6, making the example equivalent to "xz -6e".
+ preset_number = LZMA_PRESET_DEFAULT;
+
+ return;
+}
+
+
+tuklib_attr_noreturn
+static void
+memlimit_too_small(uint64_t memory_usage)
+{
+ message(V_ERROR, _("Memory usage limit is too low for the given "
+ "filter setup."));
+ message_mem_needed(V_ERROR, memory_usage);
+ tuklib_exit(E_ERROR, E_ERROR, false);
+}
+
+
+extern void
+coder_set_compression_settings(void)
+{
+#ifdef HAVE_LZIP_DECODER
+ // .lz compression isn't supported.
+ assert(opt_format != FORMAT_LZIP);
+#endif
+
+ // The default check type is CRC64, but fallback to CRC32
+ // if CRC64 isn't supported by the copy of liblzma we are
+ // using. CRC32 is always supported.
+ if (check_default) {
+ check = LZMA_CHECK_CRC64;
+ if (!lzma_check_is_supported(check))
+ check = LZMA_CHECK_CRC32;
+ }
+
+ // Options for LZMA1 or LZMA2 in case we are using a preset.
+ static lzma_options_lzma opt_lzma;
+
+ if (filters_count == 0) {
+ // We are using a preset. This is not a good idea in raw mode
+ // except when playing around with things. Different versions
+ // of this software may use different options in presets, and
+ // thus make uncompressing the raw data difficult.
+ if (opt_format == FORMAT_RAW) {
+ // The message is shown only if warnings are allowed
+ // but the exit status isn't changed.
+ message(V_WARNING, _("Using a preset in raw mode "
+ "is discouraged."));
+ message(V_WARNING, _("The exact options of the "
+ "presets may vary between software "
+ "versions."));
+ }
+
+ // Get the preset for LZMA1 or LZMA2.
+ if (lzma_lzma_preset(&opt_lzma, preset_number))
+ message_bug();
+
+ // Use LZMA2 except with --format=lzma we use LZMA1.
+ filters[0].id = opt_format == FORMAT_LZMA
+ ? LZMA_FILTER_LZMA1 : LZMA_FILTER_LZMA2;
+ filters[0].options = &opt_lzma;
+ filters_count = 1;
+ }
+
+ // Terminate the filter options array.
+ filters[filters_count].id = LZMA_VLI_UNKNOWN;
+
+ // If we are using the .lzma format, allow exactly one filter
+ // which has to be LZMA1.
+ if (opt_format == FORMAT_LZMA && (filters_count != 1
+ || filters[0].id != LZMA_FILTER_LZMA1))
+ message_fatal(_("The .lzma format supports only "
+ "the LZMA1 filter"));
+
+ // If we are using the .xz format, make sure that there is no LZMA1
+ // filter to prevent LZMA_PROG_ERROR.
+ if (opt_format == FORMAT_XZ)
+ for (size_t i = 0; i < filters_count; ++i)
+ if (filters[i].id == LZMA_FILTER_LZMA1)
+ message_fatal(_("LZMA1 cannot be used "
+ "with the .xz format"));
+
+ // Print the selected filter chain.
+ message_filters_show(V_DEBUG, filters);
+
+ // The --flush-timeout option requires LZMA_SYNC_FLUSH support
+ // from the filter chain. Currently threaded encoder doesn't support
+ // LZMA_SYNC_FLUSH so single-threaded mode must be used.
+ if (opt_mode == MODE_COMPRESS && opt_flush_timeout != 0) {
+ for (size_t i = 0; i < filters_count; ++i) {
+ switch (filters[i].id) {
+ case LZMA_FILTER_LZMA2:
+ case LZMA_FILTER_DELTA:
+ break;
+
+ default:
+ message_fatal(_("The filter chain is "
+ "incompatible with --flush-timeout"));
+ }
+ }
+
+ if (hardware_threads_is_mt()) {
+ message(V_WARNING, _("Switching to single-threaded "
+ "mode due to --flush-timeout"));
+ hardware_threads_set(1);
+ }
+ }
+
+ // Get the memory usage. Note that if --format=raw was used,
+ // we can be decompressing.
+ //
+ // If multithreaded .xz compression is done, this value will be
+ // replaced.
+ uint64_t memory_limit = hardware_memlimit_get(opt_mode);
+ uint64_t memory_usage = UINT64_MAX;
+ if (opt_mode == MODE_COMPRESS) {
+#ifdef HAVE_ENCODERS
+# ifdef MYTHREAD_ENABLED
+ if (opt_format == FORMAT_XZ && hardware_threads_is_mt()) {
+ memory_limit = hardware_memlimit_mtenc_get();
+ mt_options.threads = hardware_threads_get();
+ mt_options.block_size = opt_block_size;
+ mt_options.check = check;
+ memory_usage = lzma_stream_encoder_mt_memusage(
+ &mt_options);
+ if (memory_usage != UINT64_MAX)
+ message(V_DEBUG, _("Using up to %" PRIu32
+ " threads."),
+ mt_options.threads);
+ } else
+# endif
+ {
+ memory_usage = lzma_raw_encoder_memusage(filters);
+ }
+#endif
+ } else {
+#ifdef HAVE_DECODERS
+ memory_usage = lzma_raw_decoder_memusage(filters);
+#endif
+ }
+
+ if (memory_usage == UINT64_MAX)
+ message_fatal(_("Unsupported filter chain or filter options"));
+
+ // Print memory usage info before possible dictionary
+ // size auto-adjusting.
+ //
+ // NOTE: If only encoder support was built, we cannot show the
+ // what the decoder memory usage will be.
+ message_mem_needed(V_DEBUG, memory_usage);
+#ifdef HAVE_DECODERS
+ if (opt_mode == MODE_COMPRESS) {
+ const uint64_t decmem = lzma_raw_decoder_memusage(filters);
+ if (decmem != UINT64_MAX)
+ message(V_DEBUG, _("Decompression will need "
+ "%s MiB of memory."), uint64_to_str(
+ round_up_to_mib(decmem), 0));
+ }
+#endif
+
+ if (memory_usage <= memory_limit)
+ return;
+
+ // With --format=raw settings are never adjusted to meet
+ // the memory usage limit.
+ if (opt_format == FORMAT_RAW)
+ memlimit_too_small(memory_usage);
+
+ assert(opt_mode == MODE_COMPRESS);
+
+#ifdef HAVE_ENCODERS
+# ifdef MYTHREAD_ENABLED
+ if (opt_format == FORMAT_XZ && hardware_threads_is_mt()) {
+ // Try to reduce the number of threads before
+ // adjusting the compression settings down.
+ while (mt_options.threads > 1) {
+ // Reduce the number of threads by one and check
+ // the memory usage.
+ --mt_options.threads;
+ memory_usage = lzma_stream_encoder_mt_memusage(
+ &mt_options);
+ if (memory_usage == UINT64_MAX)
+ message_bug();
+
+ if (memory_usage <= memory_limit) {
+ // The memory usage is now low enough.
+ message(V_WARNING, _("Reduced the number of "
+ "threads from %s to %s to not exceed "
+ "the memory usage limit of %s MiB"),
+ uint64_to_str(
+ hardware_threads_get(), 0),
+ uint64_to_str(mt_options.threads, 1),
+ uint64_to_str(round_up_to_mib(
+ memory_limit), 2));
+ return;
+ }
+ }
+
+ // If the memory usage limit is only a soft limit (automatic
+ // number of threads and no --memlimit-compress), the limit
+ // is only used to reduce the number of threads and once at
+ // just one thread, the limit is completely ignored. This
+ // way -T0 won't use insane amount of memory but at the same
+ // time the soft limit will never make xz fail and never make
+ // xz change settings that would affect the compressed output.
+ if (hardware_memlimit_mtenc_is_default()) {
+ message(V_WARNING, _("Reduced the number of threads "
+ "from %s to one. The automatic memory usage "
+ "limit of %s MiB is still being exceeded. "
+ "%s MiB of memory is required. "
+ "Continuing anyway."),
+ uint64_to_str(hardware_threads_get(), 0),
+ uint64_to_str(
+ round_up_to_mib(memory_limit), 1),
+ uint64_to_str(
+ round_up_to_mib(memory_usage), 2));
+ return;
+ }
+
+ // If --no-adjust was used, we cannot drop to single-threaded
+ // mode since it produces different compressed output.
+ //
+ // NOTE: In xz 5.2.x, --no-adjust also prevented reducing
+ // the number of threads. This changed in 5.3.3alpha.
+ if (!opt_auto_adjust)
+ memlimit_too_small(memory_usage);
+
+ // Switch to single-threaded mode. It uses
+ // less memory than using one thread in
+ // the multithreaded mode but the output
+ // is also different.
+ hardware_threads_set(1);
+ memory_usage = lzma_raw_encoder_memusage(filters);
+ message(V_WARNING, _("Switching to single-threaded mode "
+ "to not exceed the memory usage limit of %s MiB"),
+ uint64_to_str(round_up_to_mib(memory_limit), 0));
+ }
+# endif
+
+ if (memory_usage <= memory_limit)
+ return;
+
+ // Don't adjust LZMA2 or LZMA1 dictionary size if --no-adjust
+ // was specified as that would change the compressed output.
+ if (!opt_auto_adjust)
+ memlimit_too_small(memory_usage);
+
+ // Look for the last filter if it is LZMA2 or LZMA1, so we can make
+ // it use less RAM. With other filters we don't know what to do.
+ size_t i = 0;
+ while (filters[i].id != LZMA_FILTER_LZMA2
+ && filters[i].id != LZMA_FILTER_LZMA1) {
+ if (filters[i].id == LZMA_VLI_UNKNOWN)
+ memlimit_too_small(memory_usage);
+
+ ++i;
+ }
+
+ // Decrease the dictionary size until we meet the memory
+ // usage limit. First round down to full mebibytes.
+ lzma_options_lzma *opt = filters[i].options;
+ const uint32_t orig_dict_size = opt->dict_size;
+ opt->dict_size &= ~((UINT32_C(1) << 20) - 1);
+ while (true) {
+ // If it is below 1 MiB, auto-adjusting failed. We could be
+ // more sophisticated and scale it down even more, but let's
+ // see if many complain about this version.
+ //
+ // FIXME: Displays the scaled memory usage instead
+ // of the original.
+ if (opt->dict_size < (UINT32_C(1) << 20))
+ memlimit_too_small(memory_usage);
+
+ memory_usage = lzma_raw_encoder_memusage(filters);
+ if (memory_usage == UINT64_MAX)
+ message_bug();
+
+ // Accept it if it is low enough.
+ if (memory_usage <= memory_limit)
+ break;
+
+ // Otherwise 1 MiB down and try again. I hope this
+ // isn't too slow method for cases where the original
+ // dict_size is very big.
+ opt->dict_size -= UINT32_C(1) << 20;
+ }
+
+ // Tell the user that we decreased the dictionary size.
+ message(V_WARNING, _("Adjusted LZMA%c dictionary size "
+ "from %s MiB to %s MiB to not exceed "
+ "the memory usage limit of %s MiB"),
+ filters[i].id == LZMA_FILTER_LZMA2
+ ? '2' : '1',
+ uint64_to_str(orig_dict_size >> 20, 0),
+ uint64_to_str(opt->dict_size >> 20, 1),
+ uint64_to_str(round_up_to_mib(memory_limit), 2));
+#endif
+
+ return;
+}
+
+
+#ifdef HAVE_DECODERS
+/// Return true if the data in in_buf seems to be in the .xz format.
+static bool
+is_format_xz(void)
+{
+ // Specify the magic as hex to be compatible with EBCDIC systems.
+ static const uint8_t magic[6] = { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
+ return strm.avail_in >= sizeof(magic)
+ && memcmp(in_buf.u8, magic, sizeof(magic)) == 0;
+}
+
+
+/// Return true if the data in in_buf seems to be in the .lzma format.
+static bool
+is_format_lzma(void)
+{
+ // The .lzma header is 13 bytes.
+ if (strm.avail_in < 13)
+ return false;
+
+ // Decode the LZMA1 properties.
+ lzma_filter filter = { .id = LZMA_FILTER_LZMA1 };
+ if (lzma_properties_decode(&filter, NULL, in_buf.u8, 5) != LZMA_OK)
+ return false;
+
+ // A hack to ditch tons of false positives: We allow only dictionary
+ // sizes that are 2^n or 2^n + 2^(n-1) or UINT32_MAX. LZMA_Alone
+ // created only files with 2^n, but accepts any dictionary size.
+ // If someone complains, this will be reconsidered.
+ lzma_options_lzma *opt = filter.options;
+ const uint32_t dict_size = opt->dict_size;
+ free(opt);
+
+ if (dict_size != UINT32_MAX) {
+ uint32_t d = dict_size - 1;
+ d |= d >> 2;
+ d |= d >> 3;
+ d |= d >> 4;
+ d |= d >> 8;
+ d |= d >> 16;
+ ++d;
+ if (d != dict_size || dict_size == 0)
+ return false;
+ }
+
+ // Another hack to ditch false positives: Assume that if the
+ // uncompressed size is known, it must be less than 256 GiB.
+ // Again, if someone complains, this will be reconsidered.
+ uint64_t uncompressed_size = 0;
+ for (size_t i = 0; i < 8; ++i)
+ uncompressed_size |= (uint64_t)(in_buf.u8[5 + i]) << (i * 8);
+
+ if (uncompressed_size != UINT64_MAX
+ && uncompressed_size > (UINT64_C(1) << 38))
+ return false;
+
+ return true;
+}
+
+
+#ifdef HAVE_LZIP_DECODER
+/// Return true if the data in in_buf seems to be in the .lz format.
+static bool
+is_format_lzip(void)
+{
+ static const uint8_t magic[4] = { 0x4C, 0x5A, 0x49, 0x50 };
+ return strm.avail_in >= sizeof(magic)
+ && memcmp(in_buf.u8, magic, sizeof(magic)) == 0;
+}
+#endif
+#endif
+
+
+/// Detect the input file type (for now, this done only when decompressing),
+/// and initialize an appropriate coder. Return value indicates if a normal
+/// liblzma-based coder was initialized (CODER_INIT_NORMAL), if passthru
+/// mode should be used (CODER_INIT_PASSTHRU), or if an error occurred
+/// (CODER_INIT_ERROR).
+static enum coder_init_ret
+coder_init(file_pair *pair)
+{
+ lzma_ret ret = LZMA_PROG_ERROR;
+
+ // In most cases if there is input left when coding finishes,
+ // something has gone wrong. Exceptions are --single-stream
+ // and decoding .lz files which can contain trailing non-.lz data.
+ // These will be handled later in this function.
+ allow_trailing_input = false;
+
+ if (opt_mode == MODE_COMPRESS) {
+#ifdef HAVE_ENCODERS
+ switch (opt_format) {
+ case FORMAT_AUTO:
+ // args.c ensures this.
+ assert(0);
+ break;
+
+ case FORMAT_XZ:
+# ifdef MYTHREAD_ENABLED
+ if (hardware_threads_is_mt())
+ ret = lzma_stream_encoder_mt(
+ &strm, &mt_options);
+ else
+# endif
+ ret = lzma_stream_encoder(
+ &strm, filters, check);
+ break;
+
+ case FORMAT_LZMA:
+ ret = lzma_alone_encoder(&strm, filters[0].options);
+ break;
+
+# ifdef HAVE_LZIP_DECODER
+ case FORMAT_LZIP:
+ // args.c should disallow this.
+ assert(0);
+ ret = LZMA_PROG_ERROR;
+ break;
+# endif
+
+ case FORMAT_RAW:
+ ret = lzma_raw_encoder(&strm, filters);
+ break;
+ }
+#endif
+ } else {
+#ifdef HAVE_DECODERS
+ uint32_t flags = 0;
+
+ // It seems silly to warn about unsupported check if the
+ // check won't be verified anyway due to --ignore-check.
+ if (opt_ignore_check)
+ flags |= LZMA_IGNORE_CHECK;
+ else
+ flags |= LZMA_TELL_UNSUPPORTED_CHECK;
+
+ if (opt_single_stream)
+ allow_trailing_input = true;
+ else
+ flags |= LZMA_CONCATENATED;
+
+ // We abuse FORMAT_AUTO to indicate unknown file format,
+ // for which we may consider passthru mode.
+ enum format_type init_format = FORMAT_AUTO;
+
+ switch (opt_format) {
+ case FORMAT_AUTO:
+ // .lz is checked before .lzma since .lzma detection
+ // is more complicated (no magic bytes).
+ if (is_format_xz())
+ init_format = FORMAT_XZ;
+# ifdef HAVE_LZIP_DECODER
+ else if (is_format_lzip())
+ init_format = FORMAT_LZIP;
+# endif
+ else if (is_format_lzma())
+ init_format = FORMAT_LZMA;
+ break;
+
+ case FORMAT_XZ:
+ if (is_format_xz())
+ init_format = FORMAT_XZ;
+ break;
+
+ case FORMAT_LZMA:
+ if (is_format_lzma())
+ init_format = FORMAT_LZMA;
+ break;
+
+# ifdef HAVE_LZIP_DECODER
+ case FORMAT_LZIP:
+ if (is_format_lzip())
+ init_format = FORMAT_LZIP;
+ break;
+# endif
+
+ case FORMAT_RAW:
+ init_format = FORMAT_RAW;
+ break;
+ }
+
+ switch (init_format) {
+ case FORMAT_AUTO:
+ // Unknown file format. If --decompress --stdout
+ // --force have been given, then we copy the input
+ // as is to stdout. Checking for MODE_DECOMPRESS
+ // is needed, because we don't want to do use
+ // passthru mode with --test.
+ if (opt_mode == MODE_DECOMPRESS
+ && opt_stdout && opt_force) {
+ // These are needed for progress info.
+ strm.total_in = 0;
+ strm.total_out = 0;
+ return CODER_INIT_PASSTHRU;
+ }
+
+ ret = LZMA_FORMAT_ERROR;
+ break;
+
+ case FORMAT_XZ:
+# ifdef MYTHREAD_ENABLED
+ mt_options.flags = flags;
+
+ mt_options.threads = hardware_threads_get();
+ mt_options.memlimit_stop
+ = hardware_memlimit_get(MODE_DECOMPRESS);
+
+ // If single-threaded mode was requested, set the
+ // memlimit for threading to zero. This forces the
+ // decoder to use single-threaded mode which matches
+ // the behavior of lzma_stream_decoder().
+ //
+ // Otherwise use the limit for threaded decompression
+ // which has a sane default (users are still free to
+ // make it insanely high though).
+ mt_options.memlimit_threading
+ = mt_options.threads == 1
+ ? 0 : hardware_memlimit_mtdec_get();
+
+ ret = lzma_stream_decoder_mt(&strm, &mt_options);
+# else
+ ret = lzma_stream_decoder(&strm,
+ hardware_memlimit_get(
+ MODE_DECOMPRESS), flags);
+# endif
+ break;
+
+ case FORMAT_LZMA:
+ ret = lzma_alone_decoder(&strm,
+ hardware_memlimit_get(
+ MODE_DECOMPRESS));
+ break;
+
+# ifdef HAVE_LZIP_DECODER
+ case FORMAT_LZIP:
+ allow_trailing_input = true;
+ ret = lzma_lzip_decoder(&strm,
+ hardware_memlimit_get(
+ MODE_DECOMPRESS), flags);
+ break;
+# endif
+
+ case FORMAT_RAW:
+ // Memory usage has already been checked in
+ // coder_set_compression_settings().
+ ret = lzma_raw_decoder(&strm, filters);
+ break;
+ }
+
+ // Try to decode the headers. This will catch too low
+ // memory usage limit in case it happens in the first
+ // Block of the first Stream, which is where it very
+ // probably will happen if it is going to happen.
+ //
+ // This will also catch unsupported check type which
+ // we treat as a warning only. If there are empty
+ // concatenated Streams with unsupported check type then
+ // the message can be shown more than once here. The loop
+ // is used in case there is first a warning about
+ // unsupported check type and then the first Block
+ // would exceed the memlimit.
+ if (ret == LZMA_OK && init_format != FORMAT_RAW) {
+ strm.next_out = NULL;
+ strm.avail_out = 0;
+ while ((ret = lzma_code(&strm, LZMA_RUN))
+ == LZMA_UNSUPPORTED_CHECK)
+ message_warning(_("%s: %s"), pair->src_name,
+ message_strm(ret));
+
+ // With --single-stream lzma_code won't wait for
+ // LZMA_FINISH and thus it can return LZMA_STREAM_END
+ // if the file has no uncompressed data inside.
+ // So treat LZMA_STREAM_END as LZMA_OK here.
+ // When lzma_code() is called again in coder_normal()
+ // it will return LZMA_STREAM_END again.
+ if (ret == LZMA_STREAM_END)
+ ret = LZMA_OK;
+ }
+#endif
+ }
+
+ if (ret != LZMA_OK) {
+ message_error(_("%s: %s"), pair->src_name, message_strm(ret));
+ if (ret == LZMA_MEMLIMIT_ERROR)
+ message_mem_needed(V_ERROR, lzma_memusage(&strm));
+
+ return CODER_INIT_ERROR;
+ }
+
+ return CODER_INIT_NORMAL;
+}
+
+
+/// Resolve conflicts between opt_block_size and opt_block_list in single
+/// threaded mode. We want to default to opt_block_list, except when it is
+/// larger than opt_block_size. If this is the case for the current Block
+/// at *list_pos, then we break into smaller Blocks. Otherwise advance
+/// to the next Block in opt_block_list, and break apart if needed.
+static void
+split_block(uint64_t *block_remaining,
+ uint64_t *next_block_remaining,
+ size_t *list_pos)
+{
+ if (*next_block_remaining > 0) {
+ // The Block at *list_pos has previously been split up.
+ assert(!hardware_threads_is_mt());
+ assert(opt_block_size > 0);
+ assert(opt_block_list != NULL);
+
+ if (*next_block_remaining > opt_block_size) {
+ // We have to split the current Block at *list_pos
+ // into another opt_block_size length Block.
+ *block_remaining = opt_block_size;
+ } else {
+ // This is the last remaining split Block for the
+ // Block at *list_pos.
+ *block_remaining = *next_block_remaining;
+ }
+
+ *next_block_remaining -= *block_remaining;
+
+ } else {
+ // The Block at *list_pos has been finished. Go to the next
+ // entry in the list. If the end of the list has been reached,
+ // reuse the size of the last Block.
+ if (opt_block_list[*list_pos + 1] != 0)
+ ++*list_pos;
+
+ *block_remaining = opt_block_list[*list_pos];
+
+ // If in single-threaded mode, split up the Block if needed.
+ // This is not needed in multi-threaded mode because liblzma
+ // will do this due to how threaded encoding works.
+ if (!hardware_threads_is_mt() && opt_block_size > 0
+ && *block_remaining > opt_block_size) {
+ *next_block_remaining
+ = *block_remaining - opt_block_size;
+ *block_remaining = opt_block_size;
+ }
+ }
+}
+
+
+static bool
+coder_write_output(file_pair *pair)
+{
+ if (opt_mode != MODE_TEST) {
+ if (io_write(pair, &out_buf, IO_BUFFER_SIZE - strm.avail_out))
+ return true;
+ }
+
+ strm.next_out = out_buf.u8;
+ strm.avail_out = IO_BUFFER_SIZE;
+ return false;
+}
+
+
+/// Compress or decompress using liblzma.
+static bool
+coder_normal(file_pair *pair)
+{
+ // Encoder needs to know when we have given all the input to it.
+ // The decoders need to know it too when we are using
+ // LZMA_CONCATENATED. We need to check for src_eof here, because
+ // the first input chunk has been already read if decompressing,
+ // and that may have been the only chunk we will read.
+ lzma_action action = pair->src_eof ? LZMA_FINISH : LZMA_RUN;
+
+ lzma_ret ret;
+
+ // Assume that something goes wrong.
+ bool success = false;
+
+ // block_remaining indicates how many input bytes to encode before
+ // finishing the current .xz Block. The Block size is set with
+ // --block-size=SIZE and --block-list. They have an effect only when
+ // compressing to the .xz format. If block_remaining == UINT64_MAX,
+ // only a single block is created.
+ uint64_t block_remaining = UINT64_MAX;
+
+ // next_block_remaining for when we are in single-threaded mode and
+ // the Block in --block-list is larger than the --block-size=SIZE.
+ uint64_t next_block_remaining = 0;
+
+ // Position in opt_block_list. Unused if --block-list wasn't used.
+ size_t list_pos = 0;
+
+ // Handle --block-size for single-threaded mode and the first step
+ // of --block-list.
+ if (opt_mode == MODE_COMPRESS && opt_format == FORMAT_XZ) {
+ // --block-size doesn't do anything here in threaded mode,
+ // because the threaded encoder will take care of splitting
+ // to fixed-sized Blocks.
+ if (!hardware_threads_is_mt() && opt_block_size > 0)
+ block_remaining = opt_block_size;
+
+ // If --block-list was used, start with the first size.
+ //
+ // For threaded case, --block-size specifies how big Blocks
+ // the encoder needs to be prepared to create at maximum
+ // and --block-list will simultaneously cause new Blocks
+ // to be started at specified intervals. To keep things
+ // logical, the same is done in single-threaded mode. The
+ // output is still not identical because in single-threaded
+ // mode the size info isn't written into Block Headers.
+ if (opt_block_list != NULL) {
+ if (block_remaining < opt_block_list[list_pos]) {
+ assert(!hardware_threads_is_mt());
+ next_block_remaining = opt_block_list[list_pos]
+ - block_remaining;
+ } else {
+ block_remaining = opt_block_list[list_pos];
+ }
+ }
+ }
+
+ strm.next_out = out_buf.u8;
+ strm.avail_out = IO_BUFFER_SIZE;
+
+ while (!user_abort) {
+ // Fill the input buffer if it is empty and we aren't
+ // flushing or finishing.
+ if (strm.avail_in == 0 && action == LZMA_RUN) {
+ strm.next_in = in_buf.u8;
+ strm.avail_in = io_read(pair, &in_buf,
+ my_min(block_remaining,
+ IO_BUFFER_SIZE));
+
+ if (strm.avail_in == SIZE_MAX)
+ break;
+
+ if (pair->src_eof) {
+ action = LZMA_FINISH;
+
+ } else if (block_remaining != UINT64_MAX) {
+ // Start a new Block after every
+ // opt_block_size bytes of input.
+ block_remaining -= strm.avail_in;
+ if (block_remaining == 0)
+ action = LZMA_FULL_BARRIER;
+ }
+
+ if (action == LZMA_RUN && pair->flush_needed)
+ action = LZMA_SYNC_FLUSH;
+ }
+
+ // Let liblzma do the actual work.
+ ret = lzma_code(&strm, action);
+
+ // Write out if the output buffer became full.
+ if (strm.avail_out == 0) {
+ if (coder_write_output(pair))
+ break;
+ }
+
+ if (ret == LZMA_STREAM_END && (action == LZMA_SYNC_FLUSH
+ || action == LZMA_FULL_BARRIER)) {
+ if (action == LZMA_SYNC_FLUSH) {
+ // Flushing completed. Write the pending data
+ // out immediately so that the reading side
+ // can decompress everything compressed so far.
+ if (coder_write_output(pair))
+ break;
+
+ // Mark that we haven't seen any new input
+ // since the previous flush.
+ pair->src_has_seen_input = false;
+ pair->flush_needed = false;
+ } else {
+ // Start a new Block after LZMA_FULL_BARRIER.
+ if (opt_block_list == NULL) {
+ assert(!hardware_threads_is_mt());
+ assert(opt_block_size > 0);
+ block_remaining = opt_block_size;
+ } else {
+ split_block(&block_remaining,
+ &next_block_remaining,
+ &list_pos);
+ }
+ }
+
+ // Start a new Block after LZMA_FULL_FLUSH or continue
+ // the same block after LZMA_SYNC_FLUSH.
+ action = LZMA_RUN;
+
+ } else if (ret != LZMA_OK) {
+ // Determine if the return value indicates that we
+ // won't continue coding. LZMA_NO_CHECK would be
+ // here too if LZMA_TELL_ANY_CHECK was used.
+ const bool stop = ret != LZMA_UNSUPPORTED_CHECK;
+
+ if (stop) {
+ // Write the remaining bytes even if something
+ // went wrong, because that way the user gets
+ // as much data as possible, which can be good
+ // when trying to get at least some useful
+ // data out of damaged files.
+ if (coder_write_output(pair))
+ break;
+ }
+
+ if (ret == LZMA_STREAM_END) {
+ if (allow_trailing_input) {
+ io_fix_src_pos(pair, strm.avail_in);
+ success = true;
+ break;
+ }
+
+ // Check that there is no trailing garbage.
+ // This is needed for LZMA_Alone and raw
+ // streams. This is *not* done with .lz files
+ // as that format specifically requires
+ // allowing trailing garbage.
+ if (strm.avail_in == 0 && !pair->src_eof) {
+ // Try reading one more byte.
+ // Hopefully we don't get any more
+ // input, and thus pair->src_eof
+ // becomes true.
+ strm.avail_in = io_read(
+ pair, &in_buf, 1);
+ if (strm.avail_in == SIZE_MAX)
+ break;
+
+ assert(strm.avail_in == 0
+ || strm.avail_in == 1);
+ }
+
+ if (strm.avail_in == 0) {
+ assert(pair->src_eof);
+ success = true;
+ break;
+ }
+
+ // We hadn't reached the end of the file.
+ ret = LZMA_DATA_ERROR;
+ assert(stop);
+ }
+
+ // If we get here and stop is true, something went
+ // wrong and we print an error. Otherwise it's just
+ // a warning and coding can continue.
+ if (stop) {
+ message_error(_("%s: %s"), pair->src_name,
+ message_strm(ret));
+ } else {
+ message_warning(_("%s: %s"), pair->src_name,
+ message_strm(ret));
+
+ // When compressing, all possible errors set
+ // stop to true.
+ assert(opt_mode != MODE_COMPRESS);
+ }
+
+ if (ret == LZMA_MEMLIMIT_ERROR) {
+ // Display how much memory it would have
+ // actually needed.
+ message_mem_needed(V_ERROR,
+ lzma_memusage(&strm));
+ }
+
+ if (stop)
+ break;
+ }
+
+ // Show progress information under certain conditions.
+ message_progress_update();
+ }
+
+ return success;
+}
+
+
+/// Copy from input file to output file without processing the data in any
+/// way. This is used only when trying to decompress unrecognized files
+/// with --decompress --stdout --force, so the output is always stdout.
+static bool
+coder_passthru(file_pair *pair)
+{
+ while (strm.avail_in != 0) {
+ if (user_abort)
+ return false;
+
+ if (io_write(pair, &in_buf, strm.avail_in))
+ return false;
+
+ strm.total_in += strm.avail_in;
+ strm.total_out = strm.total_in;
+ message_progress_update();
+
+ strm.avail_in = io_read(pair, &in_buf, IO_BUFFER_SIZE);
+ if (strm.avail_in == SIZE_MAX)
+ return false;
+ }
+
+ return true;
+}
+
+
+extern void
+coder_run(const char *filename)
+{
+ // Set and possibly print the filename for the progress message.
+ message_filename(filename);
+
+ // Try to open the input file.
+ file_pair *pair = io_open_src(filename);
+ if (pair == NULL)
+ return;
+
+ // Assume that something goes wrong.
+ bool success = false;
+
+ if (opt_mode == MODE_COMPRESS) {
+ strm.next_in = NULL;
+ strm.avail_in = 0;
+ } else {
+ // Read the first chunk of input data. This is needed
+ // to detect the input file type.
+ strm.next_in = in_buf.u8;
+ strm.avail_in = io_read(pair, &in_buf, IO_BUFFER_SIZE);
+ }
+
+ if (strm.avail_in != SIZE_MAX) {
+ // Initialize the coder. This will detect the file format
+ // and, in decompression or testing mode, check the memory
+ // usage of the first Block too. This way we don't try to
+ // open the destination file if we see that coding wouldn't
+ // work at all anyway. This also avoids deleting the old
+ // "target" file if --force was used.
+ const enum coder_init_ret init_ret = coder_init(pair);
+
+ if (init_ret != CODER_INIT_ERROR && !user_abort) {
+ // Don't open the destination file when --test
+ // is used.
+ if (opt_mode == MODE_TEST || !io_open_dest(pair)) {
+ // Remember the current time. It is needed
+ // for progress indicator.
+ mytime_set_start_time();
+
+ // Initialize the progress indicator.
+ //
+ // NOTE: When reading from stdin, fstat()
+ // isn't called on it and thus src_st.st_size
+ // is zero. If stdin pointed to a regular
+ // file, it would still be possible to know
+ // the file size but then we would also need
+ // to take into account the current reading
+ // position since with stdin it isn't
+ // necessarily at the beginning of the file.
+ const bool is_passthru = init_ret
+ == CODER_INIT_PASSTHRU;
+ const uint64_t in_size
+ = pair->src_st.st_size <= 0
+ ? 0 : (uint64_t)(pair->src_st.st_size);
+ message_progress_start(&strm,
+ is_passthru, in_size);
+
+ // Do the actual coding or passthru.
+ if (is_passthru)
+ success = coder_passthru(pair);
+ else
+ success = coder_normal(pair);
+
+ message_progress_end(success);
+ }
+ }
+ }
+
+ // Close the file pair. It needs to know if coding was successful to
+ // know if the source or target file should be unlinked.
+ io_close(pair, success);
+
+ return;
+}
+
+
+#ifndef NDEBUG
+extern void
+coder_free(void)
+{
+ lzma_end(&strm);
+ return;
+}
+#endif
diff --git a/src/xz/coder.h b/src/xz/coder.h
new file mode 100644
index 0000000..b4f43a2
--- /dev/null
+++ b/src/xz/coder.h
@@ -0,0 +1,79 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file coder.h
+/// \brief Compresses or uncompresses a file
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+enum operation_mode {
+ MODE_COMPRESS,
+ MODE_DECOMPRESS,
+ MODE_TEST,
+ MODE_LIST,
+};
+
+
+// NOTE: The order of these is significant in suffix.c.
+enum format_type {
+ FORMAT_AUTO,
+ FORMAT_XZ,
+ FORMAT_LZMA,
+#ifdef HAVE_LZIP_DECODER
+ FORMAT_LZIP,
+#endif
+ FORMAT_RAW,
+};
+
+
+/// Operation mode of the command line tool. This is set in args.c and read
+/// in several files.
+extern enum operation_mode opt_mode;
+
+/// File format to use when encoding or what format(s) to accept when
+/// decoding. This is a global because it's needed also in suffix.c.
+/// This is set in args.c.
+extern enum format_type opt_format;
+
+/// If true, the compression settings are automatically adjusted down if
+/// they exceed the memory usage limit.
+extern bool opt_auto_adjust;
+
+/// If true, stop after decoding the first stream.
+extern bool opt_single_stream;
+
+/// If non-zero, start a new .xz Block after every opt_block_size bytes
+/// of input. This has an effect only when compressing to the .xz format.
+extern uint64_t opt_block_size;
+
+/// This is non-NULL if --block-list was used. This contains the Block sizes
+/// as an array that is terminated with 0.
+extern uint64_t *opt_block_list;
+
+/// Set the integrity check type used when compressing
+extern void coder_set_check(lzma_check check);
+
+/// Set preset number
+extern void coder_set_preset(uint32_t new_preset);
+
+/// Enable extreme mode
+extern void coder_set_extreme(void);
+
+/// Add a filter to the custom filter chain
+extern void coder_add_filter(lzma_vli id, void *options);
+
+/// Set and partially validate compression settings. This can also be used
+/// in decompression or test mode with the raw format.
+extern void coder_set_compression_settings(void);
+
+/// Compress or decompress the given file
+extern void coder_run(const char *filename);
+
+#ifndef NDEBUG
+/// Free the memory allocated for the coder and kill the worker threads.
+extern void coder_free(void);
+#endif
diff --git a/src/xz/file_io.c b/src/xz/file_io.c
new file mode 100644
index 0000000..2828029
--- /dev/null
+++ b/src/xz/file_io.c
@@ -0,0 +1,1403 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file file_io.c
+/// \brief File opening, unlinking, and closing
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+#include <fcntl.h>
+
+#ifdef TUKLIB_DOSLIKE
+# include <io.h>
+#else
+# include <poll.h>
+static bool warn_fchown;
+#endif
+
+#if defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT) || defined(HAVE_UTIMES)
+# include <sys/time.h>
+#elif defined(HAVE__FUTIME)
+# include <sys/utime.h>
+#elif defined(HAVE_UTIME)
+# include <utime.h>
+#endif
+
+#ifdef HAVE_CAPSICUM
+# ifdef HAVE_SYS_CAPSICUM_H
+# include <sys/capsicum.h>
+# else
+# include <sys/capability.h>
+# endif
+#endif
+
+#include "tuklib_open_stdxxx.h"
+
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+#ifndef O_NOCTTY
+# define O_NOCTTY 0
+#endif
+
+// Using this macro to silence a warning from gcc -Wlogical-op.
+#if EAGAIN == EWOULDBLOCK
+# define IS_EAGAIN_OR_EWOULDBLOCK(e) ((e) == EAGAIN)
+#else
+# define IS_EAGAIN_OR_EWOULDBLOCK(e) \
+ ((e) == EAGAIN || (e) == EWOULDBLOCK)
+#endif
+
+
+typedef enum {
+ IO_WAIT_MORE, // Reading or writing is possible.
+ IO_WAIT_ERROR, // Error or user_abort
+ IO_WAIT_TIMEOUT, // poll() timed out
+} io_wait_ret;
+
+
+/// If true, try to create sparse files when decompressing.
+static bool try_sparse = true;
+
+#ifdef ENABLE_SANDBOX
+/// True if the conditions for sandboxing (described in main()) have been met.
+static bool sandbox_allowed = false;
+#endif
+
+#ifndef TUKLIB_DOSLIKE
+/// File status flags of standard input. This is used by io_open_src()
+/// and io_close_src().
+static int stdin_flags;
+static bool restore_stdin_flags = false;
+
+/// Original file status flags of standard output. This is used by
+/// io_open_dest() and io_close_dest() to save and restore the flags.
+static int stdout_flags;
+static bool restore_stdout_flags = false;
+
+/// Self-pipe used together with the user_abort variable to avoid
+/// race conditions with signal handling.
+static int user_abort_pipe[2];
+#endif
+
+
+static bool io_write_buf(file_pair *pair, const uint8_t *buf, size_t size);
+
+
+extern void
+io_init(void)
+{
+ // Make sure that stdin, stdout, and stderr are connected to
+ // a valid file descriptor. Exit immediately with exit code ERROR
+ // if we cannot make the file descriptors valid. Maybe we should
+ // print an error message, but our stderr could be screwed anyway.
+ tuklib_open_stdxxx(E_ERROR);
+
+#ifndef TUKLIB_DOSLIKE
+ // If fchown() fails setting the owner, we warn about it only if
+ // we are root.
+ warn_fchown = geteuid() == 0;
+
+ // Create a pipe for the self-pipe trick.
+ if (pipe(user_abort_pipe))
+ message_fatal(_("Error creating a pipe: %s"),
+ strerror(errno));
+
+ // Make both ends of the pipe non-blocking.
+ for (unsigned i = 0; i < 2; ++i) {
+ int flags = fcntl(user_abort_pipe[i], F_GETFL);
+ if (flags == -1 || fcntl(user_abort_pipe[i], F_SETFL,
+ flags | O_NONBLOCK) == -1)
+ message_fatal(_("Error creating a pipe: %s"),
+ strerror(errno));
+ }
+#endif
+
+#ifdef __DJGPP__
+ // Avoid doing useless things when statting files.
+ // This isn't important but doesn't hurt.
+ _djstat_flags = _STAT_EXEC_EXT | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
+#endif
+
+ return;
+}
+
+
+#ifndef TUKLIB_DOSLIKE
+extern void
+io_write_to_user_abort_pipe(void)
+{
+ // If the write() fails, it's probably due to the pipe being full.
+ // Failing in that case is fine. If the reason is something else,
+ // there's not much we can do since this is called in a signal
+ // handler. So ignore the errors and try to avoid warnings with
+ // GCC and glibc when _FORTIFY_SOURCE=2 is used.
+ uint8_t b = '\0';
+ const ssize_t ret = write(user_abort_pipe[1], &b, 1);
+ (void)ret;
+ return;
+}
+#endif
+
+
+extern void
+io_no_sparse(void)
+{
+ try_sparse = false;
+ return;
+}
+
+
+#ifdef ENABLE_SANDBOX
+extern void
+io_allow_sandbox(void)
+{
+ sandbox_allowed = true;
+ return;
+}
+
+
+/// Enables operating-system-specific sandbox if it is possible.
+/// src_fd is the file descriptor of the input file.
+static void
+io_sandbox_enter(int src_fd)
+{
+ if (!sandbox_allowed) {
+ // This message is more often annoying than useful so
+ // it's commented out. It can be useful when developing
+ // the sandboxing code.
+ //message(V_DEBUG, _("Sandbox is disabled due "
+ // "to incompatible command line arguments"));
+ return;
+ }
+
+ const char dummy_str[] = "x";
+
+ // Try to ensure that both libc and xz locale files have been
+ // loaded when NLS is enabled.
+ snprintf(NULL, 0, "%s%s", _(dummy_str), strerror(EINVAL));
+
+ // Try to ensure that iconv data files needed for handling multibyte
+ // characters have been loaded. This is needed at least with glibc.
+ tuklib_mbstr_width(dummy_str, NULL);
+
+#ifdef HAVE_CAPSICUM
+ // Capsicum needs FreeBSD 10.0 or later.
+ cap_rights_t rights;
+
+ if (cap_enter())
+ goto error;
+
+ if (cap_rights_limit(src_fd, cap_rights_init(&rights,
+ CAP_EVENT, CAP_FCNTL, CAP_LOOKUP, CAP_READ, CAP_SEEK)))
+ goto error;
+
+ if (src_fd != STDIN_FILENO && cap_rights_limit(
+ STDIN_FILENO, cap_rights_clear(&rights)))
+ goto error;
+
+ if (cap_rights_limit(STDOUT_FILENO, cap_rights_init(&rights,
+ CAP_EVENT, CAP_FCNTL, CAP_FSTAT, CAP_LOOKUP,
+ CAP_WRITE, CAP_SEEK)))
+ goto error;
+
+ if (cap_rights_limit(STDERR_FILENO, cap_rights_init(&rights,
+ CAP_WRITE)))
+ goto error;
+
+ if (cap_rights_limit(user_abort_pipe[0], cap_rights_init(&rights,
+ CAP_EVENT)))
+ goto error;
+
+ if (cap_rights_limit(user_abort_pipe[1], cap_rights_init(&rights,
+ CAP_WRITE)))
+ goto error;
+
+#elif defined(HAVE_PLEDGE)
+ // pledge() was introduced in OpenBSD 5.9.
+ //
+ // main() unconditionally calls pledge() with fairly relaxed
+ // promises which work in all situations. Here we make the
+ // sandbox more strict.
+ if (pledge("stdio", ""))
+ goto error;
+
+ (void)src_fd;
+
+#else
+# error ENABLE_SANDBOX is defined but no sandboxing method was found.
+#endif
+
+ // This message is annoying in xz -lvv.
+ //message(V_DEBUG, _("Sandbox was successfully enabled"));
+ return;
+
+error:
+#ifdef HAVE_CAPSICUM
+ // If a kernel is configured without capability mode support or
+ // used in an emulator that does not implement the capability
+ // system calls, then the Capsicum system calls will fail and set
+ // errno to ENOSYS. In that case xz will silently run without
+ // the sandbox.
+ if (errno == ENOSYS)
+ return;
+#endif
+ message_fatal(_("Failed to enable the sandbox"));
+}
+#endif // ENABLE_SANDBOX
+
+
+#ifndef TUKLIB_DOSLIKE
+/// \brief Waits for input or output to become available or for a signal
+///
+/// This uses the self-pipe trick to avoid a race condition that can occur
+/// if a signal is caught after user_abort has been checked but before e.g.
+/// read() has been called. In that situation read() could block unless
+/// non-blocking I/O is used. With non-blocking I/O something like select()
+/// or poll() is needed to avoid a busy-wait loop, and the same race condition
+/// pops up again. There are pselect() (POSIX-1.2001) and ppoll() (not in
+/// POSIX) but neither is portable enough in 2013. The self-pipe trick is
+/// old and very portable.
+static io_wait_ret
+io_wait(file_pair *pair, int timeout, bool is_reading)
+{
+ struct pollfd pfd[2];
+
+ if (is_reading) {
+ pfd[0].fd = pair->src_fd;
+ pfd[0].events = POLLIN;
+ } else {
+ pfd[0].fd = pair->dest_fd;
+ pfd[0].events = POLLOUT;
+ }
+
+ pfd[1].fd = user_abort_pipe[0];
+ pfd[1].events = POLLIN;
+
+ while (true) {
+ const int ret = poll(pfd, 2, timeout);
+
+ if (user_abort)
+ return IO_WAIT_ERROR;
+
+ if (ret == -1) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+
+ message_error(_("%s: poll() failed: %s"),
+ is_reading ? pair->src_name
+ : pair->dest_name,
+ strerror(errno));
+ return IO_WAIT_ERROR;
+ }
+
+ if (ret == 0)
+ return IO_WAIT_TIMEOUT;
+
+ if (pfd[0].revents != 0)
+ return IO_WAIT_MORE;
+ }
+}
+#endif
+
+
+/// \brief Unlink a file
+///
+/// This tries to verify that the file being unlinked really is the file that
+/// we want to unlink by verifying device and inode numbers. There's still
+/// a small unavoidable race, but this is much better than nothing (the file
+/// could have been moved/replaced even hours earlier).
+static void
+io_unlink(const char *name, const struct stat *known_st)
+{
+#if defined(TUKLIB_DOSLIKE)
+ // On DOS-like systems, st_ino is meaningless, so don't bother
+ // testing it. Just silence a compiler warning.
+ (void)known_st;
+#else
+ struct stat new_st;
+
+ // If --force was used, use stat() instead of lstat(). This way
+ // (de)compressing symlinks works correctly. However, it also means
+ // that xz cannot detect if a regular file foo is renamed to bar
+ // and then a symlink foo -> bar is created. Because of stat()
+ // instead of lstat(), xz will think that foo hasn't been replaced
+ // with another file. Thus, xz will remove foo even though it no
+ // longer is the same file that xz used when it started compressing.
+ // Probably it's not too bad though, so this doesn't need a more
+ // complex fix.
+ const int stat_ret = opt_force
+ ? stat(name, &new_st) : lstat(name, &new_st);
+
+ if (stat_ret
+# ifdef __VMS
+ // st_ino is an array, and we don't want to
+ // compare st_dev at all.
+ || memcmp(&new_st.st_ino, &known_st->st_ino,
+ sizeof(new_st.st_ino)) != 0
+# else
+ // Typical POSIX-like system
+ || new_st.st_dev != known_st->st_dev
+ || new_st.st_ino != known_st->st_ino
+# endif
+ )
+ // TRANSLATORS: When compression or decompression finishes,
+ // and xz is going to remove the source file, xz first checks
+ // if the source file still exists, and if it does, does its
+ // device and inode numbers match what xz saw when it opened
+ // the source file. If these checks fail, this message is
+ // shown, %s being the filename, and the file is not deleted.
+ // The check for device and inode numbers is there, because
+ // it is possible that the user has put a new file in place
+ // of the original file, and in that case it obviously
+ // shouldn't be removed.
+ message_warning(_("%s: File seems to have been moved, "
+ "not removing"), name);
+ else
+#endif
+ // There's a race condition between lstat() and unlink()
+ // but at least we have tried to avoid removing wrong file.
+ if (unlink(name))
+ message_warning(_("%s: Cannot remove: %s"),
+ name, strerror(errno));
+
+ return;
+}
+
+
+/// \brief Copies owner/group and permissions
+///
+/// \todo ACL and EA support
+///
+static void
+io_copy_attrs(const file_pair *pair)
+{
+ // Skip chown and chmod on Windows.
+#ifndef TUKLIB_DOSLIKE
+ // This function is more tricky than you may think at first.
+ // Blindly copying permissions may permit users to access the
+ // destination file who didn't have permission to access the
+ // source file.
+
+ // Try changing the owner of the file. If we aren't root or the owner
+ // isn't already us, fchown() probably doesn't succeed. We warn
+ // about failing fchown() only if we are root.
+ if (fchown(pair->dest_fd, pair->src_st.st_uid, (gid_t)(-1))
+ && warn_fchown)
+ message_warning(_("%s: Cannot set the file owner: %s"),
+ pair->dest_name, strerror(errno));
+
+ mode_t mode;
+
+ // With BSD semantics the new dest file may have a group that
+ // does not belong to the user. If the src file has the same gid
+ // nothing has to be done. Nevertheless OpenBSD fchown(2) fails
+ // in this case which seems to be POSIX compliant. As there is
+ // nothing to do, skip the system call.
+ if (pair->dest_st.st_gid != pair->src_st.st_gid
+ && fchown(pair->dest_fd, (uid_t)(-1),
+ pair->src_st.st_gid)) {
+ message_warning(_("%s: Cannot set the file group: %s"),
+ pair->dest_name, strerror(errno));
+ // We can still safely copy some additional permissions:
+ // `group' must be at least as strict as `other' and
+ // also vice versa.
+ //
+ // NOTE: After this, the owner of the source file may
+ // get additional permissions. This shouldn't be too bad,
+ // because the owner would have had permission to chmod
+ // the original file anyway.
+ mode = ((pair->src_st.st_mode & 0070) >> 3)
+ & (pair->src_st.st_mode & 0007);
+ mode = (pair->src_st.st_mode & 0700) | (mode << 3) | mode;
+ } else {
+ // Drop the setuid, setgid, and sticky bits.
+ mode = pair->src_st.st_mode & 0777;
+ }
+
+ if (fchmod(pair->dest_fd, mode))
+ message_warning(_("%s: Cannot set the file permissions: %s"),
+ pair->dest_name, strerror(errno));
+#endif
+
+ // Copy the timestamps. We have several possible ways to do this, of
+ // which some are better in both security and precision.
+ //
+ // First, get the nanosecond part of the timestamps. As of writing,
+ // it's not standardized by POSIX, and there are several names for
+ // the same thing in struct stat.
+ long atime_nsec;
+ long mtime_nsec;
+
+# if defined(HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC)
+ // GNU and Solaris
+ atime_nsec = pair->src_st.st_atim.tv_nsec;
+ mtime_nsec = pair->src_st.st_mtim.tv_nsec;
+
+# elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC)
+ // BSD
+ atime_nsec = pair->src_st.st_atimespec.tv_nsec;
+ mtime_nsec = pair->src_st.st_mtimespec.tv_nsec;
+
+# elif defined(HAVE_STRUCT_STAT_ST_ATIMENSEC)
+ // GNU and BSD without extensions
+ atime_nsec = pair->src_st.st_atimensec;
+ mtime_nsec = pair->src_st.st_mtimensec;
+
+# elif defined(HAVE_STRUCT_STAT_ST_UATIME)
+ // Tru64
+ atime_nsec = pair->src_st.st_uatime * 1000;
+ mtime_nsec = pair->src_st.st_umtime * 1000;
+
+# elif defined(HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC)
+ // UnixWare
+ atime_nsec = pair->src_st.st_atim.st__tim.tv_nsec;
+ mtime_nsec = pair->src_st.st_mtim.st__tim.tv_nsec;
+
+# else
+ // Safe fallback
+ atime_nsec = 0;
+ mtime_nsec = 0;
+# endif
+
+ // Construct a structure to hold the timestamps and call appropriate
+ // function to set the timestamps.
+#if defined(HAVE_FUTIMENS)
+ // Use nanosecond precision.
+ struct timespec tv[2];
+ tv[0].tv_sec = pair->src_st.st_atime;
+ tv[0].tv_nsec = atime_nsec;
+ tv[1].tv_sec = pair->src_st.st_mtime;
+ tv[1].tv_nsec = mtime_nsec;
+
+ (void)futimens(pair->dest_fd, tv);
+
+#elif defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT) || defined(HAVE_UTIMES)
+ // Use microsecond precision.
+ struct timeval tv[2];
+ tv[0].tv_sec = pair->src_st.st_atime;
+ tv[0].tv_usec = atime_nsec / 1000;
+ tv[1].tv_sec = pair->src_st.st_mtime;
+ tv[1].tv_usec = mtime_nsec / 1000;
+
+# if defined(HAVE_FUTIMES)
+ (void)futimes(pair->dest_fd, tv);
+# elif defined(HAVE_FUTIMESAT)
+ (void)futimesat(pair->dest_fd, NULL, tv);
+# else
+ // Argh, no function to use a file descriptor to set the timestamp.
+ (void)utimes(pair->dest_name, tv);
+# endif
+
+#elif defined(HAVE__FUTIME)
+ // Use one-second precision with Windows-specific _futime().
+ // We could use utime() too except that for some reason the
+ // timestamp will get reset at close(). With _futime() it works.
+ // This struct cannot be const as _futime() takes a non-const pointer.
+ struct _utimbuf buf = {
+ .actime = pair->src_st.st_atime,
+ .modtime = pair->src_st.st_mtime,
+ };
+
+ // Avoid warnings.
+ (void)atime_nsec;
+ (void)mtime_nsec;
+
+ (void)_futime(pair->dest_fd, &buf);
+
+#elif defined(HAVE_UTIME)
+ // Use one-second precision. utime() doesn't support using file
+ // descriptor either. Some systems have broken utime() prototype
+ // so don't make this const.
+ struct utimbuf buf = {
+ .actime = pair->src_st.st_atime,
+ .modtime = pair->src_st.st_mtime,
+ };
+
+ // Avoid warnings.
+ (void)atime_nsec;
+ (void)mtime_nsec;
+
+ (void)utime(pair->dest_name, &buf);
+#endif
+
+ return;
+}
+
+
+/// Opens the source file. Returns false on success, true on error.
+static bool
+io_open_src_real(file_pair *pair)
+{
+ // There's nothing to open when reading from stdin.
+ if (pair->src_name == stdin_filename) {
+ pair->src_fd = STDIN_FILENO;
+#ifdef TUKLIB_DOSLIKE
+ setmode(STDIN_FILENO, O_BINARY);
+#else
+ // Try to set stdin to non-blocking mode. It won't work
+ // e.g. on OpenBSD if stdout is e.g. /dev/null. In such
+ // case we proceed as if stdin were non-blocking anyway
+ // (in case of /dev/null it will be in practice). The
+ // same applies to stdout in io_open_dest_real().
+ stdin_flags = fcntl(STDIN_FILENO, F_GETFL);
+ if (stdin_flags == -1) {
+ message_error(_("Error getting the file status flags "
+ "from standard input: %s"),
+ strerror(errno));
+ return true;
+ }
+
+ if ((stdin_flags & O_NONBLOCK) == 0
+ && fcntl(STDIN_FILENO, F_SETFL,
+ stdin_flags | O_NONBLOCK) != -1)
+ restore_stdin_flags = true;
+#endif
+#ifdef HAVE_POSIX_FADVISE
+ // It will fail if stdin is a pipe and that's fine.
+ (void)posix_fadvise(STDIN_FILENO, 0, 0,
+ opt_mode == MODE_LIST
+ ? POSIX_FADV_RANDOM
+ : POSIX_FADV_SEQUENTIAL);
+#endif
+ return false;
+ }
+
+ // Symlinks are not followed unless writing to stdout or --force
+ // or --keep was used.
+ const bool follow_symlinks
+ = opt_stdout || opt_force || opt_keep_original;
+
+ // We accept only regular files if we are writing the output
+ // to disk too. bzip2 allows overriding this with --force but
+ // gzip and xz don't.
+ const bool reg_files_only = !opt_stdout;
+
+ // Flags for open()
+ int flags = O_RDONLY | O_BINARY | O_NOCTTY;
+
+#ifndef TUKLIB_DOSLIKE
+ // Use non-blocking I/O:
+ // - It prevents blocking when opening FIFOs and some other
+ // special files, which is good if we want to accept only
+ // regular files.
+ // - It can help avoiding some race conditions with signal handling.
+ flags |= O_NONBLOCK;
+#endif
+
+#if defined(O_NOFOLLOW)
+ if (!follow_symlinks)
+ flags |= O_NOFOLLOW;
+#elif !defined(TUKLIB_DOSLIKE)
+ // Some POSIX-like systems lack O_NOFOLLOW (it's not required
+ // by POSIX). Check for symlinks with a separate lstat() on
+ // these systems.
+ if (!follow_symlinks) {
+ struct stat st;
+ if (lstat(pair->src_name, &st)) {
+ message_error(_("%s: %s"), pair->src_name,
+ strerror(errno));
+ return true;
+
+ } else if (S_ISLNK(st.st_mode)) {
+ message_warning(_("%s: Is a symbolic link, "
+ "skipping"), pair->src_name);
+ return true;
+ }
+ }
+#else
+ // Avoid warnings.
+ (void)follow_symlinks;
+#endif
+
+ // Try to open the file. Signals have been blocked so EINTR shouldn't
+ // be possible.
+ pair->src_fd = open(pair->src_name, flags);
+
+ if (pair->src_fd == -1) {
+ // Signals (that have a signal handler) have been blocked.
+ assert(errno != EINTR);
+
+#ifdef O_NOFOLLOW
+ // Give an understandable error message if the reason
+ // for failing was that the file was a symbolic link.
+ //
+ // Note that at least Linux, OpenBSD, Solaris, and Darwin
+ // use ELOOP to indicate that O_NOFOLLOW was the reason
+ // that open() failed. Because there may be
+ // directories in the pathname, ELOOP may occur also
+ // because of a symlink loop in the directory part.
+ // So ELOOP doesn't tell us what actually went wrong,
+ // and this stupidity went into POSIX-1.2008 too.
+ //
+ // FreeBSD associates EMLINK with O_NOFOLLOW and
+ // Tru64 uses ENOTSUP. We use these directly here
+ // and skip the lstat() call and the associated race.
+ // I want to hear if there are other kernels that
+ // fail with something else than ELOOP with O_NOFOLLOW.
+ bool was_symlink = false;
+
+# if defined(__FreeBSD__) || defined(__DragonFly__)
+ if (errno == EMLINK)
+ was_symlink = true;
+
+# elif defined(__digital__) && defined(__unix__)
+ if (errno == ENOTSUP)
+ was_symlink = true;
+
+# elif defined(__NetBSD__)
+ if (errno == EFTYPE)
+ was_symlink = true;
+
+# else
+ if (errno == ELOOP && !follow_symlinks) {
+ const int saved_errno = errno;
+ struct stat st;
+ if (lstat(pair->src_name, &st) == 0
+ && S_ISLNK(st.st_mode))
+ was_symlink = true;
+
+ errno = saved_errno;
+ }
+# endif
+
+ if (was_symlink)
+ message_warning(_("%s: Is a symbolic link, "
+ "skipping"), pair->src_name);
+ else
+#endif
+ // Something else than O_NOFOLLOW failing
+ // (assuming that the race conditions didn't
+ // confuse us).
+ message_error(_("%s: %s"), pair->src_name,
+ strerror(errno));
+
+ return true;
+ }
+
+ // Stat the source file. We need the result also when we copy
+ // the permissions, and when unlinking.
+ //
+ // NOTE: Use stat() instead of fstat() with DJGPP, because
+ // then we have a better chance to get st_ino value that can
+ // be used in io_open_dest_real() to prevent overwriting the
+ // source file.
+#ifdef __DJGPP__
+ if (stat(pair->src_name, &pair->src_st))
+ goto error_msg;
+#else
+ if (fstat(pair->src_fd, &pair->src_st))
+ goto error_msg;
+#endif
+
+ if (S_ISDIR(pair->src_st.st_mode)) {
+ message_warning(_("%s: Is a directory, skipping"),
+ pair->src_name);
+ goto error;
+ }
+
+ if (reg_files_only && !S_ISREG(pair->src_st.st_mode)) {
+ message_warning(_("%s: Not a regular file, skipping"),
+ pair->src_name);
+ goto error;
+ }
+
+#ifndef TUKLIB_DOSLIKE
+ if (reg_files_only && !opt_force && !opt_keep_original) {
+ if (pair->src_st.st_mode & (S_ISUID | S_ISGID)) {
+ // gzip rejects setuid and setgid files even
+ // when --force was used. bzip2 doesn't check
+ // for them, but calls fchown() after fchmod(),
+ // and many systems automatically drop setuid
+ // and setgid bits there.
+ //
+ // We accept setuid and setgid files if
+ // --force or --keep was used. We drop these bits
+ // explicitly in io_copy_attr().
+ message_warning(_("%s: File has setuid or "
+ "setgid bit set, skipping"),
+ pair->src_name);
+ goto error;
+ }
+
+ if (pair->src_st.st_mode & S_ISVTX) {
+ message_warning(_("%s: File has sticky bit "
+ "set, skipping"),
+ pair->src_name);
+ goto error;
+ }
+
+ if (pair->src_st.st_nlink > 1) {
+ message_warning(_("%s: Input file has more "
+ "than one hard link, "
+ "skipping"), pair->src_name);
+ goto error;
+ }
+ }
+
+ // If it is something else than a regular file, wait until
+ // there is input available. This way reading from FIFOs
+ // will work when open() is used with O_NONBLOCK.
+ if (!S_ISREG(pair->src_st.st_mode)) {
+ signals_unblock();
+ const io_wait_ret ret = io_wait(pair, -1, true);
+ signals_block();
+
+ if (ret != IO_WAIT_MORE)
+ goto error;
+ }
+#endif
+
+#ifdef HAVE_POSIX_FADVISE
+ // It will fail with some special files like FIFOs but that is fine.
+ (void)posix_fadvise(pair->src_fd, 0, 0,
+ opt_mode == MODE_LIST
+ ? POSIX_FADV_RANDOM
+ : POSIX_FADV_SEQUENTIAL);
+#endif
+
+ return false;
+
+error_msg:
+ message_error(_("%s: %s"), pair->src_name, strerror(errno));
+error:
+ (void)close(pair->src_fd);
+ return true;
+}
+
+
+extern file_pair *
+io_open_src(const char *src_name)
+{
+ if (src_name[0] == '\0') {
+ message_error(_("Empty filename, skipping"));
+ return NULL;
+ }
+
+ // Since we have only one file open at a time, we can use
+ // a statically allocated structure.
+ static file_pair pair;
+
+ // This implicitly also initializes src_st.st_size to zero
+ // which is expected to be <= 0 by default. fstat() isn't
+ // called when reading from standard input but src_st.st_size
+ // is still read.
+ pair = (file_pair){
+ .src_name = src_name,
+ .dest_name = NULL,
+ .src_fd = -1,
+ .dest_fd = -1,
+ .src_eof = false,
+ .src_has_seen_input = false,
+ .flush_needed = false,
+ .dest_try_sparse = false,
+ .dest_pending_sparse = 0,
+ };
+
+ // Block the signals, for which we have a custom signal handler, so
+ // that we don't need to worry about EINTR.
+ signals_block();
+ const bool error = io_open_src_real(&pair);
+ signals_unblock();
+
+#ifdef ENABLE_SANDBOX
+ if (!error)
+ io_sandbox_enter(pair.src_fd);
+#endif
+
+ return error ? NULL : &pair;
+}
+
+
+/// \brief Closes source file of the file_pair structure
+///
+/// \param pair File whose src_fd should be closed
+/// \param success If true, the file will be removed from the disk if
+/// closing succeeds and --keep hasn't been used.
+static void
+io_close_src(file_pair *pair, bool success)
+{
+#ifndef TUKLIB_DOSLIKE
+ if (restore_stdin_flags) {
+ assert(pair->src_fd == STDIN_FILENO);
+
+ restore_stdin_flags = false;
+
+ if (fcntl(STDIN_FILENO, F_SETFL, stdin_flags) == -1)
+ message_error(_("Error restoring the status flags "
+ "to standard input: %s"),
+ strerror(errno));
+ }
+#endif
+
+ if (pair->src_fd != STDIN_FILENO && pair->src_fd != -1) {
+ // Close the file before possibly unlinking it. On DOS-like
+ // systems this is always required since unlinking will fail
+ // if the file is open. On POSIX systems it usually works
+ // to unlink open files, but in some cases it doesn't and
+ // one gets EBUSY in errno.
+ //
+ // xz 5.2.2 and older unlinked the file before closing it
+ // (except on DOS-like systems). The old code didn't handle
+ // EBUSY and could fail e.g. on some CIFS shares. The
+ // advantage of unlinking before closing is negligible
+ // (avoids a race between close() and stat()/lstat() and
+ // unlink()), so let's keep this simple.
+ (void)close(pair->src_fd);
+
+ if (success && !opt_keep_original)
+ io_unlink(pair->src_name, &pair->src_st);
+ }
+
+ return;
+}
+
+
+static bool
+io_open_dest_real(file_pair *pair)
+{
+ if (opt_stdout || pair->src_fd == STDIN_FILENO) {
+ // We don't modify or free() this.
+ pair->dest_name = (char *)"(stdout)";
+ pair->dest_fd = STDOUT_FILENO;
+#ifdef TUKLIB_DOSLIKE
+ setmode(STDOUT_FILENO, O_BINARY);
+#else
+ // Try to set O_NONBLOCK if it isn't already set.
+ // If it fails, we assume that stdout is non-blocking
+ // in practice. See the comments in io_open_src_real()
+ // for similar situation with stdin.
+ //
+ // NOTE: O_APPEND may be unset later in this function
+ // and it relies on stdout_flags being set here.
+ stdout_flags = fcntl(STDOUT_FILENO, F_GETFL);
+ if (stdout_flags == -1) {
+ message_error(_("Error getting the file status flags "
+ "from standard output: %s"),
+ strerror(errno));
+ return true;
+ }
+
+ if ((stdout_flags & O_NONBLOCK) == 0
+ && fcntl(STDOUT_FILENO, F_SETFL,
+ stdout_flags | O_NONBLOCK) != -1)
+ restore_stdout_flags = true;
+#endif
+ } else {
+ pair->dest_name = suffix_get_dest_name(pair->src_name);
+ if (pair->dest_name == NULL)
+ return true;
+
+#ifdef __DJGPP__
+ struct stat st;
+ if (stat(pair->dest_name, &st) == 0) {
+ // Check that it isn't a special file like "prn".
+ if (st.st_dev == -1) {
+ message_error("%s: Refusing to write to "
+ "a DOS special file",
+ pair->dest_name);
+ free(pair->dest_name);
+ return true;
+ }
+
+ // Check that we aren't overwriting the source file.
+ if (st.st_dev == pair->src_st.st_dev
+ && st.st_ino == pair->src_st.st_ino) {
+ message_error("%s: Output file is the same "
+ "as the input file",
+ pair->dest_name);
+ free(pair->dest_name);
+ return true;
+ }
+ }
+#endif
+
+ // If --force was used, unlink the target file first.
+ if (opt_force && unlink(pair->dest_name) && errno != ENOENT) {
+ message_error(_("%s: Cannot remove: %s"),
+ pair->dest_name, strerror(errno));
+ free(pair->dest_name);
+ return true;
+ }
+
+ // Open the file.
+ int flags = O_WRONLY | O_BINARY | O_NOCTTY
+ | O_CREAT | O_EXCL;
+#ifndef TUKLIB_DOSLIKE
+ flags |= O_NONBLOCK;
+#endif
+ const mode_t mode = S_IRUSR | S_IWUSR;
+ pair->dest_fd = open(pair->dest_name, flags, mode);
+
+ if (pair->dest_fd == -1) {
+ message_error(_("%s: %s"), pair->dest_name,
+ strerror(errno));
+ free(pair->dest_name);
+ return true;
+ }
+ }
+
+ if (fstat(pair->dest_fd, &pair->dest_st)) {
+ // If fstat() really fails, we have a safe fallback here.
+#if defined(__VMS)
+ pair->dest_st.st_ino[0] = 0;
+ pair->dest_st.st_ino[1] = 0;
+ pair->dest_st.st_ino[2] = 0;
+#else
+ pair->dest_st.st_dev = 0;
+ pair->dest_st.st_ino = 0;
+#endif
+ }
+#if defined(TUKLIB_DOSLIKE) && !defined(__DJGPP__)
+ // Check that the output file is a regular file. We open with O_EXCL
+ // but that doesn't prevent open()/_open() on Windows from opening
+ // files like "con" or "nul".
+ //
+ // With DJGPP this check is done with stat() even before opening
+ // the output file. That method or a variant of it doesn't work on
+ // Windows because on Windows stat()/_stat64() sets st.st_mode so
+ // that S_ISREG(st.st_mode) will be true even for special files.
+ // With fstat()/_fstat64() it works.
+ else if (pair->dest_fd != STDOUT_FILENO
+ && !S_ISREG(pair->dest_st.st_mode)) {
+ message_error("%s: Destination is not a regular file",
+ pair->dest_name);
+
+ // dest_fd needs to be reset to -1 to keep io_close() working.
+ (void)close(pair->dest_fd);
+ pair->dest_fd = -1;
+
+ free(pair->dest_name);
+ return true;
+ }
+#elif !defined(TUKLIB_DOSLIKE)
+ else if (try_sparse && opt_mode == MODE_DECOMPRESS) {
+ // When writing to standard output, we need to be extra
+ // careful:
+ // - It may be connected to something else than
+ // a regular file.
+ // - We aren't necessarily writing to a new empty file
+ // or to the end of an existing file.
+ // - O_APPEND may be active.
+ //
+ // TODO: I'm keeping this disabled for DOS-like systems
+ // for now. FAT doesn't support sparse files, but NTFS
+ // does, so maybe this should be enabled on Windows after
+ // some testing.
+ if (pair->dest_fd == STDOUT_FILENO) {
+ if (!S_ISREG(pair->dest_st.st_mode))
+ return false;
+
+ if (stdout_flags & O_APPEND) {
+ // Creating a sparse file is not possible
+ // when O_APPEND is active (it's used by
+ // shell's >> redirection). As I understand
+ // it, it is safe to temporarily disable
+ // O_APPEND in xz, because if someone
+ // happened to write to the same file at the
+ // same time, results would be bad anyway
+ // (users shouldn't assume that xz uses any
+ // specific block size when writing data).
+ //
+ // The write position may be something else
+ // than the end of the file, so we must fix
+ // it to start writing at the end of the file
+ // to imitate O_APPEND.
+ if (lseek(STDOUT_FILENO, 0, SEEK_END) == -1)
+ return false;
+
+ // Construct the new file status flags.
+ // If O_NONBLOCK was set earlier in this
+ // function, it must be kept here too.
+ int flags = stdout_flags & ~O_APPEND;
+ if (restore_stdout_flags)
+ flags |= O_NONBLOCK;
+
+ // If this fcntl() fails, we continue but won't
+ // try to create sparse output. The original
+ // flags will still be restored if needed (to
+ // unset O_NONBLOCK) when the file is finished.
+ if (fcntl(STDOUT_FILENO, F_SETFL, flags) == -1)
+ return false;
+
+ // Disabling O_APPEND succeeded. Mark
+ // that the flags should be restored
+ // in io_close_dest(). (This may have already
+ // been set when enabling O_NONBLOCK.)
+ restore_stdout_flags = true;
+
+ } else if (lseek(STDOUT_FILENO, 0, SEEK_CUR)
+ != pair->dest_st.st_size) {
+ // Writing won't start exactly at the end
+ // of the file. We cannot use sparse output,
+ // because it would probably corrupt the file.
+ return false;
+ }
+ }
+
+ pair->dest_try_sparse = true;
+ }
+#endif
+
+ return false;
+}
+
+
+extern bool
+io_open_dest(file_pair *pair)
+{
+ signals_block();
+ const bool ret = io_open_dest_real(pair);
+ signals_unblock();
+ return ret;
+}
+
+
+/// \brief Closes destination file of the file_pair structure
+///
+/// \param pair File whose dest_fd should be closed
+/// \param success If false, the file will be removed from the disk.
+///
+/// \return Zero if closing succeeds. On error, -1 is returned and
+/// error message printed.
+static bool
+io_close_dest(file_pair *pair, bool success)
+{
+#ifndef TUKLIB_DOSLIKE
+ // If io_open_dest() has disabled O_APPEND, restore it here.
+ if (restore_stdout_flags) {
+ assert(pair->dest_fd == STDOUT_FILENO);
+
+ restore_stdout_flags = false;
+
+ if (fcntl(STDOUT_FILENO, F_SETFL, stdout_flags) == -1) {
+ message_error(_("Error restoring the O_APPEND flag "
+ "to standard output: %s"),
+ strerror(errno));
+ return true;
+ }
+ }
+#endif
+
+ if (pair->dest_fd == -1 || pair->dest_fd == STDOUT_FILENO)
+ return false;
+
+ if (close(pair->dest_fd)) {
+ message_error(_("%s: Closing the file failed: %s"),
+ pair->dest_name, strerror(errno));
+
+ // Closing destination file failed, so we cannot trust its
+ // contents. Get rid of junk:
+ io_unlink(pair->dest_name, &pair->dest_st);
+ free(pair->dest_name);
+ return true;
+ }
+
+ // If the operation using this file wasn't successful, we git rid
+ // of the junk file.
+ if (!success)
+ io_unlink(pair->dest_name, &pair->dest_st);
+
+ free(pair->dest_name);
+
+ return false;
+}
+
+
+extern void
+io_close(file_pair *pair, bool success)
+{
+ // Take care of sparseness at the end of the output file.
+ if (success && pair->dest_try_sparse
+ && pair->dest_pending_sparse > 0) {
+ // Seek forward one byte less than the size of the pending
+ // hole, then write one zero-byte. This way the file grows
+ // to its correct size. An alternative would be to use
+ // ftruncate() but that isn't portable enough (e.g. it
+ // doesn't work with FAT on Linux; FAT isn't that important
+ // since it doesn't support sparse files anyway, but we don't
+ // want to create corrupt files on it).
+ if (lseek(pair->dest_fd, pair->dest_pending_sparse - 1,
+ SEEK_CUR) == -1) {
+ message_error(_("%s: Seeking failed when trying "
+ "to create a sparse file: %s"),
+ pair->dest_name, strerror(errno));
+ success = false;
+ } else {
+ const uint8_t zero[1] = { '\0' };
+ if (io_write_buf(pair, zero, 1))
+ success = false;
+ }
+ }
+
+ signals_block();
+
+ // Copy the file attributes. We need to skip this if destination
+ // file isn't open or it is standard output.
+ if (success && pair->dest_fd != -1 && pair->dest_fd != STDOUT_FILENO)
+ io_copy_attrs(pair);
+
+ // Close the destination first. If it fails, we must not remove
+ // the source file!
+ if (io_close_dest(pair, success))
+ success = false;
+
+ // Close the source file, and unlink it if the operation using this
+ // file pair was successful and we haven't requested to keep the
+ // source file.
+ io_close_src(pair, success);
+
+ signals_unblock();
+
+ return;
+}
+
+
+extern void
+io_fix_src_pos(file_pair *pair, size_t rewind_size)
+{
+ assert(rewind_size <= IO_BUFFER_SIZE);
+
+ if (rewind_size > 0) {
+ // This doesn't need to work on unseekable file descriptors,
+ // so just ignore possible errors.
+ (void)lseek(pair->src_fd, -(off_t)(rewind_size), SEEK_CUR);
+ }
+
+ return;
+}
+
+
+extern size_t
+io_read(file_pair *pair, io_buf *buf, size_t size)
+{
+ assert(size <= IO_BUFFER_SIZE);
+
+ size_t pos = 0;
+
+ while (pos < size) {
+ const ssize_t amount = read(
+ pair->src_fd, buf->u8 + pos, size - pos);
+
+ if (amount == 0) {
+ pair->src_eof = true;
+ break;
+ }
+
+ if (amount == -1) {
+ if (errno == EINTR) {
+ if (user_abort)
+ return SIZE_MAX;
+
+ continue;
+ }
+
+#ifndef TUKLIB_DOSLIKE
+ if (IS_EAGAIN_OR_EWOULDBLOCK(errno)) {
+ // Disable the flush-timeout if no input has
+ // been seen since the previous flush and thus
+ // there would be nothing to flush after the
+ // timeout expires (avoids busy waiting).
+ const int timeout = pair->src_has_seen_input
+ ? mytime_get_flush_timeout()
+ : -1;
+
+ switch (io_wait(pair, timeout, true)) {
+ case IO_WAIT_MORE:
+ continue;
+
+ case IO_WAIT_ERROR:
+ return SIZE_MAX;
+
+ case IO_WAIT_TIMEOUT:
+ pair->flush_needed = true;
+ return pos;
+
+ default:
+ message_bug();
+ }
+ }
+#endif
+
+ message_error(_("%s: Read error: %s"),
+ pair->src_name, strerror(errno));
+
+ return SIZE_MAX;
+ }
+
+ pos += (size_t)(amount);
+
+ if (!pair->src_has_seen_input) {
+ pair->src_has_seen_input = true;
+ mytime_set_flush_time();
+ }
+ }
+
+ return pos;
+}
+
+
+extern bool
+io_seek_src(file_pair *pair, uint64_t pos)
+{
+ // Caller must not attempt to seek past the end of the input file
+ // (seeking to 100 in a 100-byte file is seeking to the end of
+ // the file, not past the end of the file, and thus that is allowed).
+ //
+ // This also validates that pos can be safely cast to off_t.
+ if (pos > (uint64_t)(pair->src_st.st_size))
+ message_bug();
+
+ if (lseek(pair->src_fd, (off_t)(pos), SEEK_SET) == -1) {
+ message_error(_("%s: Error seeking the file: %s"),
+ pair->src_name, strerror(errno));
+ return true;
+ }
+
+ pair->src_eof = false;
+
+ return false;
+}
+
+
+extern bool
+io_pread(file_pair *pair, io_buf *buf, size_t size, uint64_t pos)
+{
+ // Using lseek() and read() is more portable than pread() and
+ // for us it is as good as real pread().
+ if (io_seek_src(pair, pos))
+ return true;
+
+ const size_t amount = io_read(pair, buf, size);
+ if (amount == SIZE_MAX)
+ return true;
+
+ if (amount != size) {
+ message_error(_("%s: Unexpected end of file"),
+ pair->src_name);
+ return true;
+ }
+
+ return false;
+}
+
+
+static bool
+is_sparse(const io_buf *buf)
+{
+ assert(IO_BUFFER_SIZE % sizeof(uint64_t) == 0);
+
+ for (size_t i = 0; i < ARRAY_SIZE(buf->u64); ++i)
+ if (buf->u64[i] != 0)
+ return false;
+
+ return true;
+}
+
+
+static bool
+io_write_buf(file_pair *pair, const uint8_t *buf, size_t size)
+{
+ assert(size <= IO_BUFFER_SIZE);
+
+ while (size > 0) {
+ const ssize_t amount = write(pair->dest_fd, buf, size);
+ if (amount == -1) {
+ if (errno == EINTR) {
+ if (user_abort)
+ return true;
+
+ continue;
+ }
+
+#ifndef TUKLIB_DOSLIKE
+ if (IS_EAGAIN_OR_EWOULDBLOCK(errno)) {
+ if (io_wait(pair, -1, false) == IO_WAIT_MORE)
+ continue;
+
+ return true;
+ }
+#endif
+
+ // Handle broken pipe specially. gzip and bzip2
+ // don't print anything on SIGPIPE. In addition,
+ // gzip --quiet uses exit status 2 (warning) on
+ // broken pipe instead of whatever raise(SIGPIPE)
+ // would make it return. It is there to hide "Broken
+ // pipe" message on some old shells (probably old
+ // GNU bash).
+ //
+ // We don't do anything special with --quiet, which
+ // is what bzip2 does too. If we get SIGPIPE, we
+ // will handle it like other signals by setting
+ // user_abort, and get EPIPE here.
+ if (errno != EPIPE)
+ message_error(_("%s: Write error: %s"),
+ pair->dest_name, strerror(errno));
+
+ return true;
+ }
+
+ buf += (size_t)(amount);
+ size -= (size_t)(amount);
+ }
+
+ return false;
+}
+
+
+extern bool
+io_write(file_pair *pair, const io_buf *buf, size_t size)
+{
+ assert(size <= IO_BUFFER_SIZE);
+
+ if (pair->dest_try_sparse) {
+ // Check if the block is sparse (contains only zeros). If it
+ // sparse, we just store the amount and return. We will take
+ // care of actually skipping over the hole when we hit the
+ // next data block or close the file.
+ //
+ // Since io_close() requires that dest_pending_sparse > 0
+ // if the file ends with sparse block, we must also return
+ // if size == 0 to avoid doing the lseek().
+ if (size == IO_BUFFER_SIZE) {
+ // Even if the block was sparse, treat it as non-sparse
+ // if the pending sparse amount is large compared to
+ // the size of off_t. In practice this only matters
+ // on 32-bit systems where off_t isn't always 64 bits.
+ const off_t pending_max
+ = (off_t)(1) << (sizeof(off_t) * CHAR_BIT - 2);
+ if (is_sparse(buf) && pair->dest_pending_sparse
+ < pending_max) {
+ pair->dest_pending_sparse += (off_t)(size);
+ return false;
+ }
+ } else if (size == 0) {
+ return false;
+ }
+
+ // This is not a sparse block. If we have a pending hole,
+ // skip it now.
+ if (pair->dest_pending_sparse > 0) {
+ if (lseek(pair->dest_fd, pair->dest_pending_sparse,
+ SEEK_CUR) == -1) {
+ message_error(_("%s: Seeking failed when "
+ "trying to create a sparse "
+ "file: %s"), pair->dest_name,
+ strerror(errno));
+ return true;
+ }
+
+ pair->dest_pending_sparse = 0;
+ }
+ }
+
+ return io_write_buf(pair, buf->u8, size);
+}
diff --git a/src/xz/file_io.h b/src/xz/file_io.h
new file mode 100644
index 0000000..6992efa
--- /dev/null
+++ b/src/xz/file_io.h
@@ -0,0 +1,179 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file file_io.h
+/// \brief I/O types and functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+// Some systems have suboptimal BUFSIZ. Use a bit bigger value on them.
+// We also need that IO_BUFFER_SIZE is a multiple of 8 (sizeof(uint64_t))
+#if BUFSIZ <= 1024
+# define IO_BUFFER_SIZE 8192
+#else
+# define IO_BUFFER_SIZE (BUFSIZ & ~7U)
+#endif
+
+
+/// is_sparse() accesses the buffer as uint64_t for maximum speed.
+/// The u32 and u64 members must only be access through this union
+/// to avoid strict aliasing violations. Taking a pointer of u8
+/// should be fine as long as uint8_t maps to unsigned char which
+/// can alias anything.
+typedef union {
+ uint8_t u8[IO_BUFFER_SIZE];
+ uint32_t u32[IO_BUFFER_SIZE / sizeof(uint32_t)];
+ uint64_t u64[IO_BUFFER_SIZE / sizeof(uint64_t)];
+} io_buf;
+
+
+typedef struct {
+ /// Name of the source filename (as given on the command line) or
+ /// pointer to static "(stdin)" when reading from standard input.
+ const char *src_name;
+
+ /// Destination filename converted from src_name or pointer to static
+ /// "(stdout)" when writing to standard output.
+ char *dest_name;
+
+ /// File descriptor of the source file
+ int src_fd;
+
+ /// File descriptor of the target file
+ int dest_fd;
+
+ /// True once end of the source file has been detected.
+ bool src_eof;
+
+ /// For --flush-timeout: True if at least one byte has been read
+ /// since the previous flush or the start of the file.
+ bool src_has_seen_input;
+
+ /// For --flush-timeout: True when flushing is needed.
+ bool flush_needed;
+
+ /// If true, we look for long chunks of zeros and try to create
+ /// a sparse file.
+ bool dest_try_sparse;
+
+ /// This is used only if dest_try_sparse is true. This holds the
+ /// number of zero bytes we haven't written out, because we plan
+ /// to make that byte range a sparse chunk.
+ off_t dest_pending_sparse;
+
+ /// Stat of the source file.
+ struct stat src_st;
+
+ /// Stat of the destination file.
+ struct stat dest_st;
+
+} file_pair;
+
+
+/// \brief Initialize the I/O module
+extern void io_init(void);
+
+
+#ifndef TUKLIB_DOSLIKE
+/// \brief Write a byte to user_abort_pipe[1]
+///
+/// This is called from a signal handler.
+extern void io_write_to_user_abort_pipe(void);
+#endif
+
+
+/// \brief Disable creation of sparse files when decompressing
+extern void io_no_sparse(void);
+
+
+#ifdef ENABLE_SANDBOX
+/// \brief main() calls this if conditions for sandboxing have been met.
+extern void io_allow_sandbox(void);
+#endif
+
+
+/// \brief Open the source file
+extern file_pair *io_open_src(const char *src_name);
+
+
+/// \brief Open the destination file
+extern bool io_open_dest(file_pair *pair);
+
+
+/// \brief Closes the file descriptors and frees possible allocated memory
+///
+/// The success argument determines if source or destination file gets
+/// unlinked:
+/// - false: The destination file is unlinked.
+/// - true: The source file is unlinked unless writing to stdout or --keep
+/// was used.
+extern void io_close(file_pair *pair, bool success);
+
+
+/// \brief Reads from the source file to a buffer
+///
+/// \param pair File pair having the source file open for reading
+/// \param buf Destination buffer to hold the read data
+/// \param size Size of the buffer; must be at most IO_BUFFER_SIZE
+///
+/// \return On success, number of bytes read is returned. On end of
+/// file zero is returned and pair->src_eof set to true.
+/// On error, SIZE_MAX is returned and error message printed.
+extern size_t io_read(file_pair *pair, io_buf *buf, size_t size);
+
+
+/// \brief Fix the position in src_fd
+///
+/// This is used when --single-thream has been specified and decompression
+/// is successful. If the input file descriptor supports seeking, this
+/// function fixes the input position to point to the next byte after the
+/// decompressed stream.
+///
+/// \param pair File pair having the source file open for reading
+/// \param rewind_size How many bytes of extra have been read i.e.
+/// how much to seek backwards.
+extern void io_fix_src_pos(file_pair *pair, size_t rewind_size);
+
+
+/// \brief Seek to the given absolute position in the source file
+///
+/// This calls lseek() and also clears pair->src_eof.
+///
+/// \param pair Seekable source file
+/// \param pos Offset relative to the beginning of the file,
+/// from which the data should be read.
+///
+/// \return On success, false is returned. On error, error message
+/// is printed and true is returned.
+extern bool io_seek_src(file_pair *pair, uint64_t pos);
+
+
+/// \brief Read from source file from given offset to a buffer
+///
+/// This is remotely similar to standard pread(). This uses lseek() though,
+/// so the read offset is changed on each call.
+///
+/// \param pair Seekable source file
+/// \param buf Destination buffer
+/// \param size Amount of data to read
+/// \param pos Offset relative to the beginning of the file,
+/// from which the data should be read.
+///
+/// \return On success, false is returned. On error, error message
+/// is printed and true is returned.
+extern bool io_pread(file_pair *pair, io_buf *buf, size_t size, uint64_t pos);
+
+
+/// \brief Writes a buffer to the destination file
+///
+/// \param pair File pair having the destination file open for writing
+/// \param buf Buffer containing the data to be written
+/// \param size Size of the buffer; must be at most IO_BUFFER_SIZE
+///
+/// \return On success, zero is returned. On error, -1 is returned
+/// and error message printed.
+extern bool io_write(file_pair *pair, const io_buf *buf, size_t size);
diff --git a/src/xz/hardware.c b/src/xz/hardware.c
new file mode 100644
index 0000000..c694882
--- /dev/null
+++ b/src/xz/hardware.c
@@ -0,0 +1,338 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file hardware.c
+/// \brief Detection of available hardware resources
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+
+/// Maximum number of worker threads. This can be set with
+/// the --threads=NUM command line option.
+static uint32_t threads_max = 1;
+
+/// True when the number of threads is automatically determined based
+/// on the available hardware threads.
+static bool threads_are_automatic = false;
+
+/// If true, then try to use multi-threaded mode (if memlimit allows)
+/// even if only one thread was requested explicitly (-T+1).
+static bool use_mt_mode_with_one_thread = false;
+
+/// Memory usage limit for compression
+static uint64_t memlimit_compress = 0;
+
+/// Memory usage limit for decompression
+static uint64_t memlimit_decompress = 0;
+
+/// Default memory usage for multithreaded modes:
+///
+/// - Default value for --memlimit-compress when automatic number of threads
+/// is used. However, if the limit wouldn't allow even one thread then
+/// the limit is ignored in coder.c and one thread will be used anyway.
+/// This mess is a compromise: we wish to prevent -T0 from using too
+/// many threads but we also don't want xz to give an error due to
+/// a memlimit that the user didn't explicitly set.
+///
+/// - Default value for --memlimit-mt-decompress
+///
+/// This value is calculated in hardware_init() and cannot be changed later.
+static uint64_t memlimit_mt_default;
+
+/// Memory usage limit for multithreaded decompression. This is a soft limit:
+/// if reducing the number of threads to one isn't enough to keep memory
+/// usage below this limit, then one thread is used and this limit is ignored.
+/// memlimit_decompress is still obeyed.
+///
+/// This can be set with --memlimit-mt-decompress. The default value for
+/// this is memlimit_mt_default.
+static uint64_t memlimit_mtdec;
+
+/// Total amount of physical RAM
+static uint64_t total_ram;
+
+
+extern void
+hardware_threads_set(uint32_t n)
+{
+ // Reset these to false first and set them to true when appropriate.
+ threads_are_automatic = false;
+ use_mt_mode_with_one_thread = false;
+
+ if (n == 0) {
+ // Automatic number of threads was requested.
+ // If there is only one hardware thread, multi-threaded
+ // mode will still be used if memory limit allows.
+ threads_are_automatic = true;
+ use_mt_mode_with_one_thread = true;
+
+ // If threading support was enabled at build time,
+ // use the number of available CPU cores. Otherwise
+ // use one thread since disabling threading support
+ // omits lzma_cputhreads() from liblzma.
+#ifdef MYTHREAD_ENABLED
+ threads_max = lzma_cputhreads();
+ if (threads_max == 0)
+ threads_max = 1;
+#else
+ threads_max = 1;
+#endif
+ } else if (n == UINT32_MAX) {
+ use_mt_mode_with_one_thread = true;
+ threads_max = 1;
+ } else {
+ threads_max = n;
+ }
+
+ return;
+}
+
+
+extern uint32_t
+hardware_threads_get(void)
+{
+ return threads_max;
+}
+
+
+extern bool
+hardware_threads_is_mt(void)
+{
+#ifdef MYTHREAD_ENABLED
+ return threads_max > 1 || use_mt_mode_with_one_thread;
+#else
+ return false;
+#endif
+}
+
+
+extern void
+hardware_memlimit_set(uint64_t new_memlimit,
+ bool set_compress, bool set_decompress, bool set_mtdec,
+ bool is_percentage)
+{
+ if (is_percentage) {
+ assert(new_memlimit > 0);
+ assert(new_memlimit <= 100);
+ new_memlimit = (uint32_t)new_memlimit * total_ram / 100;
+ }
+
+ if (set_compress) {
+ memlimit_compress = new_memlimit;
+
+#if SIZE_MAX == UINT32_MAX
+ // FIXME?
+ //
+ // When running a 32-bit xz on a system with a lot of RAM and
+ // using a percentage-based memory limit, the result can be
+ // bigger than the 32-bit address space. Limiting the limit
+ // below SIZE_MAX for compression (not decompression) makes
+ // xz lower the compression settings (or number of threads)
+ // to a level that *might* work. In practice it has worked
+ // when using a 64-bit kernel that gives full 4 GiB address
+ // space to 32-bit programs. In other situations this might
+ // still be too high, like 32-bit kernels that may give much
+ // less than 4 GiB to a single application.
+ //
+ // So this is an ugly hack but I will keep it here while
+ // it does more good than bad.
+ //
+ // Use a value less than SIZE_MAX so that there's some room
+ // for the xz program and so on. Don't use 4000 MiB because
+ // it could look like someone mixed up base-2 and base-10.
+#ifdef __mips__
+ // For MIPS32, due to architectural peculiarities,
+ // the limit is even lower.
+ const uint64_t limit_max = UINT64_C(2000) << 20;
+#else
+ const uint64_t limit_max = UINT64_C(4020) << 20;
+#endif
+
+ // UINT64_MAX is a special case for the string "max" so
+ // that has to be handled specially.
+ if (memlimit_compress != UINT64_MAX
+ && memlimit_compress > limit_max)
+ memlimit_compress = limit_max;
+#endif
+ }
+
+ if (set_decompress)
+ memlimit_decompress = new_memlimit;
+
+ if (set_mtdec)
+ memlimit_mtdec = new_memlimit;
+
+ return;
+}
+
+
+extern uint64_t
+hardware_memlimit_get(enum operation_mode mode)
+{
+ // 0 is a special value that indicates the default.
+ // It disables the limit in single-threaded mode.
+ //
+ // NOTE: For multithreaded decompression, this is the hard limit
+ // (memlimit_stop). hardware_memlimit_mtdec_get() gives the
+ // soft limit (memlimit_threaded).
+ const uint64_t memlimit = mode == MODE_COMPRESS
+ ? memlimit_compress : memlimit_decompress;
+ return memlimit != 0 ? memlimit : UINT64_MAX;
+}
+
+
+extern uint64_t
+hardware_memlimit_mtenc_get(void)
+{
+ return hardware_memlimit_mtenc_is_default()
+ ? memlimit_mt_default
+ : hardware_memlimit_get(MODE_COMPRESS);
+}
+
+
+extern bool
+hardware_memlimit_mtenc_is_default(void)
+{
+ return memlimit_compress == 0 && threads_are_automatic;
+}
+
+
+extern uint64_t
+hardware_memlimit_mtdec_get(void)
+{
+ uint64_t m = memlimit_mtdec != 0
+ ? memlimit_mtdec
+ : memlimit_mt_default;
+
+ // Cap the value to memlimit_decompress if it has been specified.
+ // This is nice for --info-memory. It wouldn't be needed for liblzma
+ // since it does this anyway.
+ if (memlimit_decompress != 0 && m > memlimit_decompress)
+ m = memlimit_decompress;
+
+ return m;
+}
+
+
+/// Helper for hardware_memlimit_show() to print one human-readable info line.
+static void
+memlimit_show(const char *str, size_t str_columns, uint64_t value)
+{
+ // Calculate the field width so that str will be padded to take
+ // str_columns on the terminal.
+ //
+ // NOTE: If the string is invalid, this will be -1. Using -1 as
+ // the field width is fine here so it's not handled specially.
+ const int fw = tuklib_mbstr_fw(str, (int)(str_columns));
+
+ // The memory usage limit is considered to be disabled if value
+ // is 0 or UINT64_MAX. This might get a bit more complex once there
+ // is threading support. See the comment in hardware_memlimit_get().
+ if (value == 0 || value == UINT64_MAX)
+ printf(" %-*s %s\n", fw, str, _("Disabled"));
+ else
+ printf(" %-*s %s MiB (%s B)\n", fw, str,
+ uint64_to_str(round_up_to_mib(value), 0),
+ uint64_to_str(value, 1));
+
+ return;
+}
+
+
+extern void
+hardware_memlimit_show(void)
+{
+ uint32_t cputhreads = 1;
+#ifdef MYTHREAD_ENABLED
+ cputhreads = lzma_cputhreads();
+ if (cputhreads == 0)
+ cputhreads = 1;
+#endif
+
+ if (opt_robot) {
+ printf("%" PRIu64 "\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%" PRIu64 "\t%" PRIu32 "\n",
+ total_ram,
+ memlimit_compress,
+ memlimit_decompress,
+ hardware_memlimit_mtdec_get(),
+ memlimit_mt_default,
+ cputhreads);
+ } else {
+ const char *msgs[] = {
+ _("Amount of physical memory (RAM):"),
+ _("Number of processor threads:"),
+ _("Compression:"),
+ _("Decompression:"),
+ _("Multi-threaded decompression:"),
+ _("Default for -T0:"),
+ };
+
+ size_t width_max = 1;
+ for (unsigned i = 0; i < ARRAY_SIZE(msgs); ++i) {
+ size_t w = tuklib_mbstr_width(msgs[i], NULL);
+
+ // When debugging, catch invalid strings with
+ // an assertion. Otherwise fallback to 1 so
+ // that the columns just won't be aligned.
+ assert(w != (size_t)-1);
+ if (w == (size_t)-1)
+ w = 1;
+
+ if (width_max < w)
+ width_max = w;
+ }
+
+ puts(_("Hardware information:"));
+ memlimit_show(msgs[0], width_max, total_ram);
+ printf(" %-*s %" PRIu32 "\n",
+ tuklib_mbstr_fw(msgs[1], (int)(width_max)),
+ msgs[1], cputhreads);
+
+ putchar('\n');
+ puts(_("Memory usage limits:"));
+ memlimit_show(msgs[2], width_max, memlimit_compress);
+ memlimit_show(msgs[3], width_max, memlimit_decompress);
+ memlimit_show(msgs[4], width_max,
+ hardware_memlimit_mtdec_get());
+ memlimit_show(msgs[5], width_max, memlimit_mt_default);
+ }
+
+ tuklib_exit(E_SUCCESS, E_ERROR, message_verbosity_get() != V_SILENT);
+}
+
+
+extern void
+hardware_init(void)
+{
+ // Get the amount of RAM. If we cannot determine it,
+ // use the assumption defined by the configure script.
+ total_ram = lzma_physmem();
+ if (total_ram == 0)
+ total_ram = (uint64_t)(ASSUME_RAM) * 1024 * 1024;
+
+ // FIXME? There may be better methods to determine the default value.
+ // One Linux-specific suggestion is to use MemAvailable from
+ // /proc/meminfo as the starting point.
+ memlimit_mt_default = total_ram / 4;
+
+#if SIZE_MAX == UINT32_MAX
+ // A too high value may cause 32-bit xz to run out of address space.
+ // Use a conservative maximum value here. A few typical address space
+ // sizes with Linux:
+ // - x86-64 with 32-bit xz: 4 GiB
+ // - x86: 3 GiB
+ // - MIPS32: 2 GiB
+ const size_t mem_ceiling = 1400U << 20;
+ if (memlimit_mt_default > mem_ceiling)
+ memlimit_mt_default = mem_ceiling;
+#endif
+
+ return;
+}
diff --git a/src/xz/hardware.h b/src/xz/hardware.h
new file mode 100644
index 0000000..a67b26e
--- /dev/null
+++ b/src/xz/hardware.h
@@ -0,0 +1,75 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file hardware.h
+/// \brief Detection of available hardware resources
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// Initialize some hardware-specific variables, which are needed by other
+/// hardware_* functions.
+extern void hardware_init(void);
+
+
+/// Set the maximum number of worker threads.
+/// A special value of UINT32_MAX sets one thread in multi-threaded mode.
+extern void hardware_threads_set(uint32_t threadlimit);
+
+/// Get the maximum number of worker threads.
+extern uint32_t hardware_threads_get(void);
+
+/// Returns true if multithreaded mode should be used for .xz compression.
+/// This can be true even if the number of threads is one.
+extern bool hardware_threads_is_mt(void);
+
+
+/// Set the memory usage limit. There are separate limits for compression,
+/// decompression (also includes --list), and multithreaded decompression.
+/// Any combination of these can be set with a single call to this function.
+/// Zero indicates resetting the limit back to the defaults.
+/// The limit can also be set as a percentage of installed RAM; the
+/// percentage must be in the range [1, 100].
+extern void hardware_memlimit_set(uint64_t new_memlimit,
+ bool set_compress, bool set_decompress, bool set_mtdec,
+ bool is_percentage);
+
+/// Get the current memory usage limit for compression or decompression.
+/// This is a hard limit that will not be exceeded. This is obeyed in
+/// both single-threaded and multithreaded modes.
+extern uint64_t hardware_memlimit_get(enum operation_mode mode);
+
+/// This returns a system-specific default value if all of the following
+/// conditions are true:
+///
+/// - An automatic number of threads was requested (--threads=0).
+///
+/// - --memlimit-compress wasn't used or it was reset to the default
+/// value by setting it to 0.
+///
+/// Otherwise this is identical to hardware_memlimit_get(MODE_COMPRESS).
+///
+/// The idea is to keep automatic thread count reasonable so that too
+/// high memory usage is avoided and, with 32-bit xz, running out of
+/// address space is avoided.
+extern uint64_t hardware_memlimit_mtenc_get(void);
+
+/// Returns true if the value returned by hardware_memlimit_mtenc_get() is
+/// a system-specific default value. coder.c uses this to ignore the default
+/// memlimit in case it's too small even for a single thread in multithreaded
+/// mode. This way the default limit will never make xz fail or affect the
+/// compressed output; it will only make xz reduce the number of threads.
+extern bool hardware_memlimit_mtenc_is_default(void);
+
+/// Get the current memory usage limit for multithreaded decompression.
+/// This is only used to reduce the number of threads. This limit can be
+/// exceeded if the number of threads are reduce to one. Then the value
+/// from hardware_memlimit_get() will be honored like in single-threaded mode.
+extern uint64_t hardware_memlimit_mtdec_get(void);
+
+/// Display the amount of RAM and memory usage limits and exit.
+tuklib_attr_noreturn
+extern void hardware_memlimit_show(void);
diff --git a/src/xz/list.c b/src/xz/list.c
new file mode 100644
index 0000000..86c3a76
--- /dev/null
+++ b/src/xz/list.c
@@ -0,0 +1,1318 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file list.c
+/// \brief Listing information about .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+#include "tuklib_integer.h"
+
+
+/// Information about a .xz file
+typedef struct {
+ /// Combined Index of all Streams in the file
+ lzma_index *idx;
+
+ /// Total amount of Stream Padding
+ uint64_t stream_padding;
+
+ /// Highest memory usage so far
+ uint64_t memusage_max;
+
+ /// True if all Blocks so far have Compressed Size and
+ /// Uncompressed Size fields
+ bool all_have_sizes;
+
+ /// Oldest XZ Utils version that will decompress the file
+ uint32_t min_version;
+
+} xz_file_info;
+
+#define XZ_FILE_INFO_INIT { NULL, 0, 0, true, 50000002 }
+
+
+/// Information about a .xz Block
+typedef struct {
+ /// Size of the Block Header
+ uint32_t header_size;
+
+ /// A few of the Block Flags as a string
+ char flags[3];
+
+ /// Size of the Compressed Data field in the Block
+ lzma_vli compressed_size;
+
+ /// Decoder memory usage for this Block
+ uint64_t memusage;
+
+ /// The filter chain of this Block in human-readable form
+ char *filter_chain;
+
+} block_header_info;
+
+#define BLOCK_HEADER_INFO_INIT { .filter_chain = NULL }
+#define block_header_info_end(bhi) free((bhi)->filter_chain)
+
+
+/// Strings ending in a colon. These are used for lines like
+/// " Foo: 123 MiB". These are grouped because translated strings
+/// may have different maximum string length, and we want to pad all
+/// strings so that the values are aligned nicely.
+static const char *colon_strs[] = {
+ N_("Streams:"),
+ N_("Blocks:"),
+ N_("Compressed size:"),
+ N_("Uncompressed size:"),
+ N_("Ratio:"),
+ N_("Check:"),
+ N_("Stream Padding:"),
+ N_("Memory needed:"),
+ N_("Sizes in headers:"),
+ // This won't be aligned because it's so long:
+ //N_("Minimum XZ Utils version:"),
+ N_("Number of files:"),
+};
+
+/// Enum matching the above strings.
+enum {
+ COLON_STR_STREAMS,
+ COLON_STR_BLOCKS,
+ COLON_STR_COMPRESSED_SIZE,
+ COLON_STR_UNCOMPRESSED_SIZE,
+ COLON_STR_RATIO,
+ COLON_STR_CHECK,
+ COLON_STR_STREAM_PADDING,
+ COLON_STR_MEMORY_NEEDED,
+ COLON_STR_SIZES_IN_HEADERS,
+ //COLON_STR_MINIMUM_XZ_VERSION,
+ COLON_STR_NUMBER_OF_FILES,
+};
+
+/// Field widths to use with printf to pad the strings to use the same number
+/// of columns on a terminal.
+static int colon_strs_fw[ARRAY_SIZE(colon_strs)];
+
+/// Convenience macro to get the translated string and its field width
+/// using a COLON_STR_foo enum.
+#define COLON_STR(num) colon_strs_fw[num], _(colon_strs[num])
+
+
+/// Column headings
+static struct {
+ /// Table column heading string
+ const char *str;
+
+ /// Number of terminal-columns to use for this table-column.
+ /// If a translated string is longer than the initial value,
+ /// this value will be increased in init_headings().
+ int columns;
+
+ /// Field width to use for printf() to pad "str" to use "columns"
+ /// number of columns on a terminal. This is calculated in
+ /// init_headings().
+ int fw;
+
+} headings[] = {
+ { N_("Stream"), 6, 0 },
+ { N_("Block"), 9, 0 },
+ { N_("Blocks"), 9, 0 },
+ { N_("CompOffset"), 15, 0 },
+ { N_("UncompOffset"), 15, 0 },
+ { N_("CompSize"), 15, 0 },
+ { N_("UncompSize"), 15, 0 },
+ { N_("TotalSize"), 15, 0 },
+ { N_("Ratio"), 5, 0 },
+ { N_("Check"), 10, 0 },
+ { N_("CheckVal"), 1, 0 },
+ { N_("Padding"), 7, 0 },
+ { N_("Header"), 5, 0 },
+ { N_("Flags"), 2, 0 },
+ { N_("MemUsage"), 7 + 4, 0 }, // +4 is for " MiB"
+ { N_("Filters"), 1, 0 },
+};
+
+/// Enum matching the above strings.
+enum {
+ HEADING_STREAM,
+ HEADING_BLOCK,
+ HEADING_BLOCKS,
+ HEADING_COMPOFFSET,
+ HEADING_UNCOMPOFFSET,
+ HEADING_COMPSIZE,
+ HEADING_UNCOMPSIZE,
+ HEADING_TOTALSIZE,
+ HEADING_RATIO,
+ HEADING_CHECK,
+ HEADING_CHECKVAL,
+ HEADING_PADDING,
+ HEADING_HEADERSIZE,
+ HEADING_HEADERFLAGS,
+ HEADING_MEMUSAGE,
+ HEADING_FILTERS,
+};
+
+#define HEADING_STR(num) headings[num].fw, _(headings[num].str)
+
+
+/// Check ID to string mapping
+static const char check_names[LZMA_CHECK_ID_MAX + 1][12] = {
+ // TRANSLATORS: Indicates that there is no integrity check.
+ // This string is used in tables. In older xz version this
+ // string was limited to ten columns in a fixed-width font, but
+ // nowadays there is no strict length restriction anymore.
+ N_("None"),
+ "CRC32",
+ // TRANSLATORS: Indicates that integrity check name is not known,
+ // but the Check ID is known (here 2). In older xz version these
+ // strings were limited to ten columns in a fixed-width font, but
+ // nowadays there is no strict length restriction anymore.
+ N_("Unknown-2"),
+ N_("Unknown-3"),
+ "CRC64",
+ N_("Unknown-5"),
+ N_("Unknown-6"),
+ N_("Unknown-7"),
+ N_("Unknown-8"),
+ N_("Unknown-9"),
+ "SHA-256",
+ N_("Unknown-11"),
+ N_("Unknown-12"),
+ N_("Unknown-13"),
+ N_("Unknown-14"),
+ N_("Unknown-15"),
+};
+
+/// Buffer size for get_check_names(). This may be a bit ridiculous,
+/// but at least it's enough if some language needs many multibyte chars.
+#define CHECKS_STR_SIZE 1024
+
+
+/// Value of the Check field as hexadecimal string.
+/// This is set by parse_check_value().
+static char check_value[2 * LZMA_CHECK_SIZE_MAX + 1];
+
+
+/// Totals that are displayed if there was more than one file.
+/// The "files" counter is also used in print_info_adv() to show
+/// the file number.
+static struct {
+ uint64_t files;
+ uint64_t streams;
+ uint64_t blocks;
+ uint64_t compressed_size;
+ uint64_t uncompressed_size;
+ uint64_t stream_padding;
+ uint64_t memusage_max;
+ uint32_t checks;
+ uint32_t min_version;
+ bool all_have_sizes;
+} totals = { 0, 0, 0, 0, 0, 0, 0, 0, 50000002, true };
+
+
+/// Initialize colon_strs_fw[].
+static void
+init_colon_strs(void)
+{
+ // Lengths of translated strings as bytes.
+ size_t lens[ARRAY_SIZE(colon_strs)];
+
+ // Lengths of translated strings as columns.
+ size_t widths[ARRAY_SIZE(colon_strs)];
+
+ // Maximum number of columns needed by a translated string.
+ size_t width_max = 0;
+
+ for (unsigned i = 0; i < ARRAY_SIZE(colon_strs); ++i) {
+ widths[i] = tuklib_mbstr_width(_(colon_strs[i]), &lens[i]);
+
+ // If debugging is enabled, catch invalid strings with
+ // an assertion. However, when not debugging, use the
+ // byte count as the fallback width. This shouldn't
+ // ever happen unless there is a bad string in the
+ // translations, but in such case I guess it's better
+ // to try to print something useful instead of failing
+ // completely.
+ assert(widths[i] != (size_t)-1);
+ if (widths[i] == (size_t)-1)
+ widths[i] = lens[i];
+
+ if (widths[i] > width_max)
+ width_max = widths[i];
+ }
+
+ // Calculate the field width for printf("%*s") so that the strings
+ // will use width_max columns on a terminal.
+ for (unsigned i = 0; i < ARRAY_SIZE(colon_strs); ++i)
+ colon_strs_fw[i] = (int)(lens[i] + width_max - widths[i]);
+
+ return;
+}
+
+
+/// Initialize headings[].
+static void
+init_headings(void)
+{
+ // Before going through the heading strings themselves, treat
+ // the Check heading specially: Look at the widths of the various
+ // check names and increase the width of the Check column if needed.
+ // The width of the heading name "Check" will then be handled normally
+ // with other heading names in the second loop in this function.
+ for (unsigned i = 0; i < ARRAY_SIZE(check_names); ++i) {
+ size_t len;
+ size_t w = tuklib_mbstr_width(_(check_names[i]), &len);
+
+ // Error handling like in init_colon_strs().
+ assert(w != (size_t)-1);
+ if (w == (size_t)-1)
+ w = len;
+
+ // If the translated string is wider than the minimum width
+ // set at compile time, increase the width.
+ if ((size_t)(headings[HEADING_CHECK].columns) < w)
+ headings[HEADING_CHECK].columns = (int)w;
+ }
+
+ for (unsigned i = 0; i < ARRAY_SIZE(headings); ++i) {
+ size_t len;
+ size_t w = tuklib_mbstr_width(_(headings[i].str), &len);
+
+ // Error handling like in init_colon_strs().
+ assert(w != (size_t)-1);
+ if (w == (size_t)-1)
+ w = len;
+
+ // If the translated string is wider than the minimum width
+ // set at compile time, increase the width.
+ if ((size_t)(headings[i].columns) < w)
+ headings[i].columns = (int)w;
+
+ // Calculate the field width for printf("%*s") so that
+ // the string uses .columns number of columns on a terminal.
+ headings[i].fw = (int)(len + (size_t)headings[i].columns - w);
+ }
+
+ return;
+}
+
+
+/// Initialize the printf field widths that are needed to get nicely aligned
+/// output with translated strings.
+static void
+init_field_widths(void)
+{
+ init_colon_strs();
+ init_headings();
+ return;
+}
+
+
+/// Convert XZ Utils version number to a string.
+static const char *
+xz_ver_to_str(uint32_t ver)
+{
+ static char buf[32];
+
+ unsigned int major = ver / 10000000U;
+ ver -= major * 10000000U;
+
+ unsigned int minor = ver / 10000U;
+ ver -= minor * 10000U;
+
+ unsigned int patch = ver / 10U;
+ ver -= patch * 10U;
+
+ const char *stability = ver == 0 ? "alpha" : ver == 1 ? "beta" : "";
+
+ snprintf(buf, sizeof(buf), "%u.%u.%u%s",
+ major, minor, patch, stability);
+ return buf;
+}
+
+
+/// \brief Parse the Index(es) from the given .xz file
+///
+/// \param xfi Pointer to structure where the decoded information
+/// is stored.
+/// \param pair Input file
+///
+/// \return On success, false is returned. On error, true is returned.
+///
+static bool
+parse_indexes(xz_file_info *xfi, file_pair *pair)
+{
+ if (pair->src_st.st_size <= 0) {
+ message_error(_("%s: File is empty"), pair->src_name);
+ return true;
+ }
+
+ if (pair->src_st.st_size < 2 * LZMA_STREAM_HEADER_SIZE) {
+ message_error(_("%s: Too small to be a valid .xz file"),
+ pair->src_name);
+ return true;
+ }
+
+ io_buf buf;
+ lzma_stream strm = LZMA_STREAM_INIT;
+ lzma_index *idx = NULL;
+
+ lzma_ret ret = lzma_file_info_decoder(&strm, &idx,
+ hardware_memlimit_get(MODE_LIST),
+ (uint64_t)(pair->src_st.st_size));
+ if (ret != LZMA_OK) {
+ message_error(_("%s: %s"), pair->src_name, message_strm(ret));
+ return true;
+ }
+
+ while (true) {
+ if (strm.avail_in == 0) {
+ strm.next_in = buf.u8;
+ strm.avail_in = io_read(pair, &buf, IO_BUFFER_SIZE);
+ if (strm.avail_in == SIZE_MAX)
+ goto error;
+ }
+
+ ret = lzma_code(&strm, LZMA_RUN);
+
+ switch (ret) {
+ case LZMA_OK:
+ break;
+
+ case LZMA_SEEK_NEEDED:
+ // liblzma won't ask us to seek past the known size
+ // of the input file.
+ assert(strm.seek_pos
+ <= (uint64_t)(pair->src_st.st_size));
+ if (io_seek_src(pair, strm.seek_pos))
+ goto error;
+
+ // avail_in must be zero so that we will read new
+ // input.
+ strm.avail_in = 0;
+ break;
+
+ case LZMA_STREAM_END: {
+ lzma_end(&strm);
+ xfi->idx = idx;
+
+ // Calculate xfi->stream_padding.
+ lzma_index_iter iter;
+ lzma_index_iter_init(&iter, xfi->idx);
+ while (!lzma_index_iter_next(&iter,
+ LZMA_INDEX_ITER_STREAM))
+ xfi->stream_padding += iter.stream.padding;
+
+ return false;
+ }
+
+ default:
+ message_error(_("%s: %s"), pair->src_name,
+ message_strm(ret));
+
+ // If the error was too low memory usage limit,
+ // show also how much memory would have been needed.
+ if (ret == LZMA_MEMLIMIT_ERROR)
+ message_mem_needed(V_ERROR,
+ lzma_memusage(&strm));
+
+ goto error;
+ }
+ }
+
+error:
+ lzma_end(&strm);
+ return true;
+}
+
+
+/// \brief Parse the Block Header
+///
+/// The result is stored into *bhi. The caller takes care of initializing it.
+///
+/// \return False on success, true on error.
+static bool
+parse_block_header(file_pair *pair, const lzma_index_iter *iter,
+ block_header_info *bhi, xz_file_info *xfi)
+{
+#if IO_BUFFER_SIZE < LZMA_BLOCK_HEADER_SIZE_MAX
+# error IO_BUFFER_SIZE < LZMA_BLOCK_HEADER_SIZE_MAX
+#endif
+
+ // Get the whole Block Header with one read, but don't read past
+ // the end of the Block (or even its Check field).
+ const uint32_t size = my_min(iter->block.total_size
+ - lzma_check_size(iter->stream.flags->check),
+ LZMA_BLOCK_HEADER_SIZE_MAX);
+ io_buf buf;
+ if (io_pread(pair, &buf, size, iter->block.compressed_file_offset))
+ return true;
+
+ // Zero would mean Index Indicator and thus not a valid Block.
+ if (buf.u8[0] == 0)
+ goto data_error;
+
+ // Initialize the block structure and decode Block Header Size.
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+ lzma_block block;
+ block.version = 0;
+ block.check = iter->stream.flags->check;
+ block.filters = filters;
+
+ block.header_size = lzma_block_header_size_decode(buf.u8[0]);
+ if (block.header_size > size)
+ goto data_error;
+
+ // Decode the Block Header.
+ switch (lzma_block_header_decode(&block, NULL, buf.u8)) {
+ case LZMA_OK:
+ break;
+
+ case LZMA_OPTIONS_ERROR:
+ message_error(_("%s: %s"), pair->src_name,
+ message_strm(LZMA_OPTIONS_ERROR));
+ return true;
+
+ case LZMA_DATA_ERROR:
+ goto data_error;
+
+ default:
+ message_bug();
+ }
+
+ // Check the Block Flags. These must be done before calling
+ // lzma_block_compressed_size(), because it overwrites
+ // block.compressed_size.
+ //
+ // NOTE: If you add new characters here, update the minimum number of
+ // columns in headings[HEADING_HEADERFLAGS] to match the number of
+ // characters used here.
+ bhi->flags[0] = block.compressed_size != LZMA_VLI_UNKNOWN
+ ? 'c' : '-';
+ bhi->flags[1] = block.uncompressed_size != LZMA_VLI_UNKNOWN
+ ? 'u' : '-';
+ bhi->flags[2] = '\0';
+
+ // Collect information if all Blocks have both Compressed Size
+ // and Uncompressed Size fields. They can be useful e.g. for
+ // multi-threaded decompression so it can be useful to know it.
+ xfi->all_have_sizes &= block.compressed_size != LZMA_VLI_UNKNOWN
+ && block.uncompressed_size != LZMA_VLI_UNKNOWN;
+
+ // Validate or set block.compressed_size.
+ switch (lzma_block_compressed_size(&block,
+ iter->block.unpadded_size)) {
+ case LZMA_OK:
+ // Validate also block.uncompressed_size if it is present.
+ // If it isn't present, there's no need to set it since
+ // we aren't going to actually decompress the Block; if
+ // we were decompressing, then we should set it so that
+ // the Block decoder could validate the Uncompressed Size
+ // that was stored in the Index.
+ if (block.uncompressed_size == LZMA_VLI_UNKNOWN
+ || block.uncompressed_size
+ == iter->block.uncompressed_size)
+ break;
+
+ // If the above fails, the file is corrupt so
+ // LZMA_DATA_ERROR is a good error code.
+
+ // Fall through
+
+ case LZMA_DATA_ERROR:
+ // Free the memory allocated by lzma_block_header_decode().
+ lzma_filters_free(filters, NULL);
+ goto data_error;
+
+ default:
+ message_bug();
+ }
+
+ // Copy the known sizes.
+ bhi->header_size = block.header_size;
+ bhi->compressed_size = block.compressed_size;
+
+ // Calculate the decoder memory usage and update the maximum
+ // memory usage of this Block.
+ bhi->memusage = lzma_raw_decoder_memusage(filters);
+ if (xfi->memusage_max < bhi->memusage)
+ xfi->memusage_max = bhi->memusage;
+
+ // Determine the minimum XZ Utils version that supports this Block.
+ //
+ // - ARM64 filter needs 5.4.0.
+ //
+ // - 5.0.0 doesn't support empty LZMA2 streams and thus empty
+ // Blocks that use LZMA2. This decoder bug was fixed in 5.0.2.
+ if (xfi->min_version < 50040002U) {
+ for (size_t i = 0; filters[i].id != LZMA_VLI_UNKNOWN; ++i) {
+ if (filters[i].id == LZMA_FILTER_ARM64) {
+ xfi->min_version = 50040002U;
+ break;
+ }
+ }
+ }
+
+ if (xfi->min_version < 50000022U) {
+ size_t i = 0;
+ while (filters[i + 1].id != LZMA_VLI_UNKNOWN)
+ ++i;
+
+ if (filters[i].id == LZMA_FILTER_LZMA2
+ && iter->block.uncompressed_size == 0)
+ xfi->min_version = 50000022U;
+ }
+
+ // Convert the filter chain to human readable form.
+ const lzma_ret str_ret = lzma_str_from_filters(
+ &bhi->filter_chain, filters,
+ LZMA_STR_DECODER | LZMA_STR_GETOPT_LONG, NULL);
+
+ // Free the memory allocated by lzma_block_header_decode().
+ lzma_filters_free(filters, NULL);
+
+ // Check if the stringification succeeded.
+ if (str_ret != LZMA_OK) {
+ message_error(_("%s: %s"), pair->src_name,
+ message_strm(str_ret));
+ return true;
+ }
+
+ return false;
+
+data_error:
+ // Show the error message.
+ message_error(_("%s: %s"), pair->src_name,
+ message_strm(LZMA_DATA_ERROR));
+ return true;
+}
+
+
+/// \brief Parse the Check field and put it into check_value[]
+///
+/// \return False on success, true on error.
+static bool
+parse_check_value(file_pair *pair, const lzma_index_iter *iter)
+{
+ // Don't read anything from the file if there is no integrity Check.
+ if (iter->stream.flags->check == LZMA_CHECK_NONE) {
+ snprintf(check_value, sizeof(check_value), "---");
+ return false;
+ }
+
+ // Locate and read the Check field.
+ const uint32_t size = lzma_check_size(iter->stream.flags->check);
+ const uint64_t offset = iter->block.compressed_file_offset
+ + iter->block.total_size - size;
+ io_buf buf;
+ if (io_pread(pair, &buf, size, offset))
+ return true;
+
+ // CRC32 and CRC64 are in little endian. Guess that all the future
+ // 32-bit and 64-bit Check values are little endian too. It shouldn't
+ // be a too big problem if this guess is wrong.
+ if (size == 4)
+ snprintf(check_value, sizeof(check_value),
+ "%08" PRIx32, conv32le(buf.u32[0]));
+ else if (size == 8)
+ snprintf(check_value, sizeof(check_value),
+ "%016" PRIx64, conv64le(buf.u64[0]));
+ else
+ for (size_t i = 0; i < size; ++i)
+ snprintf(check_value + i * 2, 3, "%02x", buf.u8[i]);
+
+ return false;
+}
+
+
+/// \brief Parse detailed information about a Block
+///
+/// Since this requires seek(s), listing information about all Blocks can
+/// be slow.
+///
+/// \param pair Input file
+/// \param iter Location of the Block whose Check value should
+/// be printed.
+/// \param bhi Pointer to structure where to store the information
+/// about the Block Header field.
+///
+/// \return False on success, true on error. If an error occurs,
+/// the error message is printed too so the caller doesn't
+/// need to worry about that.
+static bool
+parse_details(file_pair *pair, const lzma_index_iter *iter,
+ block_header_info *bhi, xz_file_info *xfi)
+{
+ if (parse_block_header(pair, iter, bhi, xfi))
+ return true;
+
+ if (parse_check_value(pair, iter))
+ return true;
+
+ return false;
+}
+
+
+/// \brief Get the compression ratio
+///
+/// This has slightly different format than that is used in message.c.
+static const char *
+get_ratio(uint64_t compressed_size, uint64_t uncompressed_size)
+{
+ if (uncompressed_size == 0)
+ return "---";
+
+ const double ratio = (double)(compressed_size)
+ / (double)(uncompressed_size);
+ if (ratio > 9.999)
+ return "---";
+
+ static char buf[16];
+ snprintf(buf, sizeof(buf), "%.3f", ratio);
+ return buf;
+}
+
+
+/// \brief Get a comma-separated list of Check names
+///
+/// The check names are translated with gettext except when in robot mode.
+///
+/// \param buf Buffer to hold the resulting string
+/// \param checks Bit mask of Checks to print
+/// \param space_after_comma
+/// It's better to not use spaces in table-like listings,
+/// but in more verbose formats a space after a comma
+/// is good for readability.
+static void
+get_check_names(char buf[CHECKS_STR_SIZE],
+ uint32_t checks, bool space_after_comma)
+{
+ // If we get called when there are no Checks to print, set checks
+ // to 1 so that we print "None". This can happen in the robot mode
+ // when printing the totals line if there are no valid input files.
+ if (checks == 0)
+ checks = 1;
+
+ char *pos = buf;
+ size_t left = CHECKS_STR_SIZE;
+
+ const char *sep = space_after_comma ? ", " : ",";
+ bool comma = false;
+
+ for (size_t i = 0; i <= LZMA_CHECK_ID_MAX; ++i) {
+ if (checks & (UINT32_C(1) << i)) {
+ my_snprintf(&pos, &left, "%s%s",
+ comma ? sep : "",
+ opt_robot ? check_names[i]
+ : _(check_names[i]));
+ comma = true;
+ }
+ }
+
+ return;
+}
+
+
+static bool
+print_info_basic(const xz_file_info *xfi, file_pair *pair)
+{
+ static bool headings_displayed = false;
+ if (!headings_displayed) {
+ headings_displayed = true;
+ // TRANSLATORS: These are column headings. From Strms (Streams)
+ // to Ratio, the columns are right aligned. Check and Filename
+ // are left aligned. If you need longer words, it's OK to
+ // use two lines here. Test with "xz -l foo.xz".
+ puts(_("Strms Blocks Compressed Uncompressed Ratio "
+ "Check Filename"));
+ }
+
+ char checks[CHECKS_STR_SIZE];
+ get_check_names(checks, lzma_index_checks(xfi->idx), false);
+
+ const char *cols[7] = {
+ uint64_to_str(lzma_index_stream_count(xfi->idx), 0),
+ uint64_to_str(lzma_index_block_count(xfi->idx), 1),
+ uint64_to_nicestr(lzma_index_file_size(xfi->idx),
+ NICESTR_B, NICESTR_TIB, false, 2),
+ uint64_to_nicestr(lzma_index_uncompressed_size(xfi->idx),
+ NICESTR_B, NICESTR_TIB, false, 3),
+ get_ratio(lzma_index_file_size(xfi->idx),
+ lzma_index_uncompressed_size(xfi->idx)),
+ checks,
+ pair->src_name,
+ };
+ printf("%*s %*s %*s %*s %*s %-*s %s\n",
+ tuklib_mbstr_fw(cols[0], 5), cols[0],
+ tuklib_mbstr_fw(cols[1], 7), cols[1],
+ tuklib_mbstr_fw(cols[2], 11), cols[2],
+ tuklib_mbstr_fw(cols[3], 11), cols[3],
+ tuklib_mbstr_fw(cols[4], 5), cols[4],
+ tuklib_mbstr_fw(cols[5], 7), cols[5],
+ cols[6]);
+
+ return false;
+}
+
+
+static void
+print_adv_helper(uint64_t stream_count, uint64_t block_count,
+ uint64_t compressed_size, uint64_t uncompressed_size,
+ uint32_t checks, uint64_t stream_padding)
+{
+ char checks_str[CHECKS_STR_SIZE];
+ get_check_names(checks_str, checks, true);
+
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_STREAMS),
+ uint64_to_str(stream_count, 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_BLOCKS),
+ uint64_to_str(block_count, 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_COMPRESSED_SIZE),
+ uint64_to_nicestr(compressed_size,
+ NICESTR_B, NICESTR_TIB, true, 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_UNCOMPRESSED_SIZE),
+ uint64_to_nicestr(uncompressed_size,
+ NICESTR_B, NICESTR_TIB, true, 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_RATIO),
+ get_ratio(compressed_size, uncompressed_size));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_CHECK), checks_str);
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_STREAM_PADDING),
+ uint64_to_nicestr(stream_padding,
+ NICESTR_B, NICESTR_TIB, true, 0));
+ return;
+}
+
+
+static bool
+print_info_adv(xz_file_info *xfi, file_pair *pair)
+{
+ // Print the overall information.
+ print_adv_helper(lzma_index_stream_count(xfi->idx),
+ lzma_index_block_count(xfi->idx),
+ lzma_index_file_size(xfi->idx),
+ lzma_index_uncompressed_size(xfi->idx),
+ lzma_index_checks(xfi->idx),
+ xfi->stream_padding);
+
+ // Size of the biggest Check. This is used to calculate the width
+ // of the CheckVal field. The table would get insanely wide if
+ // we always reserved space for 64-byte Check (128 chars as hex).
+ uint32_t check_max = 0;
+
+ // Print information about the Streams.
+ //
+ // All except Check are right aligned; Check is left aligned.
+ // Test with "xz -lv foo.xz".
+ printf(" %s\n %*s %*s %*s %*s %*s %*s %*s %-*s %*s\n",
+ _(colon_strs[COLON_STR_STREAMS]),
+ HEADING_STR(HEADING_STREAM),
+ HEADING_STR(HEADING_BLOCKS),
+ HEADING_STR(HEADING_COMPOFFSET),
+ HEADING_STR(HEADING_UNCOMPOFFSET),
+ HEADING_STR(HEADING_COMPSIZE),
+ HEADING_STR(HEADING_UNCOMPSIZE),
+ HEADING_STR(HEADING_RATIO),
+ HEADING_STR(HEADING_CHECK),
+ HEADING_STR(HEADING_PADDING));
+
+ lzma_index_iter iter;
+ lzma_index_iter_init(&iter, xfi->idx);
+
+ while (!lzma_index_iter_next(&iter, LZMA_INDEX_ITER_STREAM)) {
+ const char *cols1[4] = {
+ uint64_to_str(iter.stream.number, 0),
+ uint64_to_str(iter.stream.block_count, 1),
+ uint64_to_str(iter.stream.compressed_offset, 2),
+ uint64_to_str(iter.stream.uncompressed_offset, 3),
+ };
+ printf(" %*s %*s %*s %*s ",
+ tuklib_mbstr_fw(cols1[0],
+ headings[HEADING_STREAM].columns),
+ cols1[0],
+ tuklib_mbstr_fw(cols1[1],
+ headings[HEADING_BLOCKS].columns),
+ cols1[1],
+ tuklib_mbstr_fw(cols1[2],
+ headings[HEADING_COMPOFFSET].columns),
+ cols1[2],
+ tuklib_mbstr_fw(cols1[3],
+ headings[HEADING_UNCOMPOFFSET].columns),
+ cols1[3]);
+
+ const char *cols2[5] = {
+ uint64_to_str(iter.stream.compressed_size, 0),
+ uint64_to_str(iter.stream.uncompressed_size, 1),
+ get_ratio(iter.stream.compressed_size,
+ iter.stream.uncompressed_size),
+ _(check_names[iter.stream.flags->check]),
+ uint64_to_str(iter.stream.padding, 2),
+ };
+ printf("%*s %*s %*s %-*s %*s\n",
+ tuklib_mbstr_fw(cols2[0],
+ headings[HEADING_COMPSIZE].columns),
+ cols2[0],
+ tuklib_mbstr_fw(cols2[1],
+ headings[HEADING_UNCOMPSIZE].columns),
+ cols2[1],
+ tuklib_mbstr_fw(cols2[2],
+ headings[HEADING_RATIO].columns),
+ cols2[2],
+ tuklib_mbstr_fw(cols2[3],
+ headings[HEADING_CHECK].columns),
+ cols2[3],
+ tuklib_mbstr_fw(cols2[4],
+ headings[HEADING_PADDING].columns),
+ cols2[4]);
+
+ // Update the maximum Check size.
+ if (lzma_check_size(iter.stream.flags->check) > check_max)
+ check_max = lzma_check_size(iter.stream.flags->check);
+ }
+
+ // Cache the verbosity level to a local variable.
+ const bool detailed = message_verbosity_get() >= V_DEBUG;
+
+ // Print information about the Blocks but only if there is
+ // at least one Block.
+ if (lzma_index_block_count(xfi->idx) > 0) {
+ // Calculate the width of the CheckVal column. This can be
+ // used as is as the field width for printf() when printing
+ // the actual check value as it is hexadecimal. However, to
+ // print the column heading, further calculation is needed
+ // to handle a translated string (it's done a few lines later).
+ assert(check_max <= LZMA_CHECK_SIZE_MAX);
+ const int checkval_width = my_max(
+ headings[HEADING_CHECKVAL].columns,
+ (int)(2 * check_max));
+
+ // All except Check are right aligned; Check is left aligned.
+ printf(" %s\n %*s %*s %*s %*s %*s %*s %*s %-*s",
+ _(colon_strs[COLON_STR_BLOCKS]),
+ HEADING_STR(HEADING_STREAM),
+ HEADING_STR(HEADING_BLOCK),
+ HEADING_STR(HEADING_COMPOFFSET),
+ HEADING_STR(HEADING_UNCOMPOFFSET),
+ HEADING_STR(HEADING_TOTALSIZE),
+ HEADING_STR(HEADING_UNCOMPSIZE),
+ HEADING_STR(HEADING_RATIO),
+ detailed ? headings[HEADING_CHECK].fw : 1,
+ _(headings[HEADING_CHECK].str));
+
+ if (detailed) {
+ // CheckVal (Check value), Flags, and Filters are
+ // left aligned. Block Header Size, CompSize, and
+ // MemUsage are right aligned. Test with
+ // "xz -lvv foo.xz".
+ printf(" %-*s %*s %-*s %*s %*s %s",
+ headings[HEADING_CHECKVAL].fw
+ + checkval_width
+ - headings[HEADING_CHECKVAL].columns,
+ _(headings[HEADING_CHECKVAL].str),
+ HEADING_STR(HEADING_HEADERSIZE),
+ HEADING_STR(HEADING_HEADERFLAGS),
+ HEADING_STR(HEADING_COMPSIZE),
+ HEADING_STR(HEADING_MEMUSAGE),
+ _(headings[HEADING_FILTERS].str));
+ }
+
+ putchar('\n');
+
+ lzma_index_iter_init(&iter, xfi->idx);
+
+ // Iterate over the Blocks.
+ while (!lzma_index_iter_next(&iter, LZMA_INDEX_ITER_BLOCK)) {
+ // If in detailed mode, collect the information from
+ // Block Header before starting to print the next line.
+ block_header_info bhi = BLOCK_HEADER_INFO_INIT;
+ if (detailed && parse_details(pair, &iter, &bhi, xfi))
+ return true;
+
+ const char *cols1[4] = {
+ uint64_to_str(iter.stream.number, 0),
+ uint64_to_str(
+ iter.block.number_in_stream, 1),
+ uint64_to_str(
+ iter.block.compressed_file_offset, 2),
+ uint64_to_str(
+ iter.block.uncompressed_file_offset, 3)
+ };
+ printf(" %*s %*s %*s %*s ",
+ tuklib_mbstr_fw(cols1[0],
+ headings[HEADING_STREAM].columns),
+ cols1[0],
+ tuklib_mbstr_fw(cols1[1],
+ headings[HEADING_BLOCK].columns),
+ cols1[1],
+ tuklib_mbstr_fw(cols1[2],
+ headings[HEADING_COMPOFFSET].columns),
+ cols1[2],
+ tuklib_mbstr_fw(cols1[3], headings[
+ HEADING_UNCOMPOFFSET].columns),
+ cols1[3]);
+
+ const char *cols2[4] = {
+ uint64_to_str(iter.block.total_size, 0),
+ uint64_to_str(iter.block.uncompressed_size,
+ 1),
+ get_ratio(iter.block.total_size,
+ iter.block.uncompressed_size),
+ _(check_names[iter.stream.flags->check])
+ };
+ printf("%*s %*s %*s %-*s",
+ tuklib_mbstr_fw(cols2[0],
+ headings[HEADING_TOTALSIZE].columns),
+ cols2[0],
+ tuklib_mbstr_fw(cols2[1],
+ headings[HEADING_UNCOMPSIZE].columns),
+ cols2[1],
+ tuklib_mbstr_fw(cols2[2],
+ headings[HEADING_RATIO].columns),
+ cols2[2],
+ tuklib_mbstr_fw(cols2[3], detailed
+ ? headings[HEADING_CHECK].columns : 1),
+ cols2[3]);
+
+ if (detailed) {
+ const lzma_vli compressed_size
+ = iter.block.unpadded_size
+ - bhi.header_size
+ - lzma_check_size(
+ iter.stream.flags->check);
+
+ const char *cols3[6] = {
+ check_value,
+ uint64_to_str(bhi.header_size, 0),
+ bhi.flags,
+ uint64_to_str(compressed_size, 1),
+ uint64_to_str(
+ round_up_to_mib(bhi.memusage),
+ 2),
+ bhi.filter_chain
+ };
+ // Show MiB for memory usage, because it
+ // is the only size which is not in bytes.
+ printf(" %-*s %*s %-*s %*s %*s MiB %s",
+ checkval_width, cols3[0],
+ tuklib_mbstr_fw(cols3[1], headings[
+ HEADING_HEADERSIZE].columns),
+ cols3[1],
+ tuklib_mbstr_fw(cols3[2], headings[
+ HEADING_HEADERFLAGS].columns),
+ cols3[2],
+ tuklib_mbstr_fw(cols3[3], headings[
+ HEADING_COMPSIZE].columns),
+ cols3[3],
+ tuklib_mbstr_fw(cols3[4], headings[
+ HEADING_MEMUSAGE].columns - 4),
+ cols3[4],
+ cols3[5]);
+ }
+
+ putchar('\n');
+ block_header_info_end(&bhi);
+ }
+ }
+
+ if (detailed) {
+ printf(" %-*s %s MiB\n", COLON_STR(COLON_STR_MEMORY_NEEDED),
+ uint64_to_str(
+ round_up_to_mib(xfi->memusage_max), 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_SIZES_IN_HEADERS),
+ xfi->all_have_sizes ? _("Yes") : _("No"));
+ //printf(" %-*s %s\n", COLON_STR(COLON_STR_MINIMUM_XZ_VERSION),
+ printf(_(" Minimum XZ Utils version: %s\n"),
+ xz_ver_to_str(xfi->min_version));
+ }
+
+ return false;
+}
+
+
+static bool
+print_info_robot(xz_file_info *xfi, file_pair *pair)
+{
+ char checks[CHECKS_STR_SIZE];
+ get_check_names(checks, lzma_index_checks(xfi->idx), false);
+
+ printf("name\t%s\n", pair->src_name);
+
+ printf("file\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%s\t%s\t%" PRIu64 "\n",
+ lzma_index_stream_count(xfi->idx),
+ lzma_index_block_count(xfi->idx),
+ lzma_index_file_size(xfi->idx),
+ lzma_index_uncompressed_size(xfi->idx),
+ get_ratio(lzma_index_file_size(xfi->idx),
+ lzma_index_uncompressed_size(xfi->idx)),
+ checks,
+ xfi->stream_padding);
+
+ if (message_verbosity_get() >= V_VERBOSE) {
+ lzma_index_iter iter;
+ lzma_index_iter_init(&iter, xfi->idx);
+
+ while (!lzma_index_iter_next(&iter, LZMA_INDEX_ITER_STREAM))
+ printf("stream\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%s\t%s\t%" PRIu64 "\n",
+ iter.stream.number,
+ iter.stream.block_count,
+ iter.stream.compressed_offset,
+ iter.stream.uncompressed_offset,
+ iter.stream.compressed_size,
+ iter.stream.uncompressed_size,
+ get_ratio(iter.stream.compressed_size,
+ iter.stream.uncompressed_size),
+ check_names[iter.stream.flags->check],
+ iter.stream.padding);
+
+ lzma_index_iter_rewind(&iter);
+
+ while (!lzma_index_iter_next(&iter, LZMA_INDEX_ITER_BLOCK)) {
+ block_header_info bhi = BLOCK_HEADER_INFO_INIT;
+ if (message_verbosity_get() >= V_DEBUG
+ && parse_details(
+ pair, &iter, &bhi, xfi))
+ return true;
+
+ printf("block\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%" PRIu64 "\t%" PRIu64
+ "\t%" PRIu64 "\t%" PRIu64 "\t%s\t%s",
+ iter.stream.number,
+ iter.block.number_in_stream,
+ iter.block.number_in_file,
+ iter.block.compressed_file_offset,
+ iter.block.uncompressed_file_offset,
+ iter.block.total_size,
+ iter.block.uncompressed_size,
+ get_ratio(iter.block.total_size,
+ iter.block.uncompressed_size),
+ check_names[iter.stream.flags->check]);
+
+ if (message_verbosity_get() >= V_DEBUG)
+ printf("\t%s\t%" PRIu32 "\t%s\t%" PRIu64
+ "\t%" PRIu64 "\t%s",
+ check_value,
+ bhi.header_size,
+ bhi.flags,
+ bhi.compressed_size,
+ bhi.memusage,
+ bhi.filter_chain);
+
+ putchar('\n');
+ block_header_info_end(&bhi);
+ }
+ }
+
+ if (message_verbosity_get() >= V_DEBUG)
+ printf("summary\t%" PRIu64 "\t%s\t%" PRIu32 "\n",
+ xfi->memusage_max,
+ xfi->all_have_sizes ? "yes" : "no",
+ xfi->min_version);
+
+ return false;
+}
+
+
+static void
+update_totals(const xz_file_info *xfi)
+{
+ // TODO: Integer overflow checks
+ ++totals.files;
+ totals.streams += lzma_index_stream_count(xfi->idx);
+ totals.blocks += lzma_index_block_count(xfi->idx);
+ totals.compressed_size += lzma_index_file_size(xfi->idx);
+ totals.uncompressed_size += lzma_index_uncompressed_size(xfi->idx);
+ totals.stream_padding += xfi->stream_padding;
+ totals.checks |= lzma_index_checks(xfi->idx);
+
+ if (totals.memusage_max < xfi->memusage_max)
+ totals.memusage_max = xfi->memusage_max;
+
+ if (totals.min_version < xfi->min_version)
+ totals.min_version = xfi->min_version;
+
+ totals.all_have_sizes &= xfi->all_have_sizes;
+
+ return;
+}
+
+
+static void
+print_totals_basic(void)
+{
+ // Print a separator line.
+ char line[80];
+ memset(line, '-', sizeof(line));
+ line[sizeof(line) - 1] = '\0';
+ puts(line);
+
+ // Get the check names.
+ char checks[CHECKS_STR_SIZE];
+ get_check_names(checks, totals.checks, false);
+
+ // Print the totals except the file count, which needs
+ // special handling.
+ printf("%5s %7s %11s %11s %5s %-7s ",
+ uint64_to_str(totals.streams, 0),
+ uint64_to_str(totals.blocks, 1),
+ uint64_to_nicestr(totals.compressed_size,
+ NICESTR_B, NICESTR_TIB, false, 2),
+ uint64_to_nicestr(totals.uncompressed_size,
+ NICESTR_B, NICESTR_TIB, false, 3),
+ get_ratio(totals.compressed_size,
+ totals.uncompressed_size),
+ checks);
+
+ // Since we print totals only when there are at least two files,
+ // the English message will always use "%s files". But some other
+ // languages need different forms for different plurals so we
+ // have to translate this with ngettext().
+ //
+ // TRANSLATORS: %s is an integer. Only the plural form of this
+ // message is used (e.g. "2 files"). Test with "xz -l foo.xz bar.xz".
+ printf(ngettext("%s file\n", "%s files\n",
+ totals.files <= ULONG_MAX ? totals.files
+ : (totals.files % 1000000) + 1000000),
+ uint64_to_str(totals.files, 0));
+
+ return;
+}
+
+
+static void
+print_totals_adv(void)
+{
+ putchar('\n');
+ puts(_("Totals:"));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_NUMBER_OF_FILES),
+ uint64_to_str(totals.files, 0));
+ print_adv_helper(totals.streams, totals.blocks,
+ totals.compressed_size, totals.uncompressed_size,
+ totals.checks, totals.stream_padding);
+
+ if (message_verbosity_get() >= V_DEBUG) {
+ printf(" %-*s %s MiB\n", COLON_STR(COLON_STR_MEMORY_NEEDED),
+ uint64_to_str(
+ round_up_to_mib(totals.memusage_max), 0));
+ printf(" %-*s %s\n", COLON_STR(COLON_STR_SIZES_IN_HEADERS),
+ totals.all_have_sizes ? _("Yes") : _("No"));
+ //printf(" %-*s %s\n", COLON_STR(COLON_STR_MINIMUM_XZ_VERSION),
+ printf(_(" Minimum XZ Utils version: %s\n"),
+ xz_ver_to_str(totals.min_version));
+ }
+
+ return;
+}
+
+
+static void
+print_totals_robot(void)
+{
+ char checks[CHECKS_STR_SIZE];
+ get_check_names(checks, totals.checks, false);
+
+ printf("totals\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64 "\t%" PRIu64
+ "\t%s\t%s\t%" PRIu64 "\t%" PRIu64,
+ totals.streams,
+ totals.blocks,
+ totals.compressed_size,
+ totals.uncompressed_size,
+ get_ratio(totals.compressed_size,
+ totals.uncompressed_size),
+ checks,
+ totals.stream_padding,
+ totals.files);
+
+ if (message_verbosity_get() >= V_DEBUG)
+ printf("\t%" PRIu64 "\t%s\t%" PRIu32,
+ totals.memusage_max,
+ totals.all_have_sizes ? "yes" : "no",
+ totals.min_version);
+
+ putchar('\n');
+
+ return;
+}
+
+
+extern void
+list_totals(void)
+{
+ if (opt_robot) {
+ // Always print totals in --robot mode. It can be convenient
+ // in some cases and doesn't complicate usage of the
+ // single-file case much.
+ print_totals_robot();
+
+ } else if (totals.files > 1) {
+ // For non-robot mode, totals are printed only if there
+ // is more than one file.
+ if (message_verbosity_get() <= V_WARNING)
+ print_totals_basic();
+ else
+ print_totals_adv();
+ }
+
+ return;
+}
+
+
+extern void
+list_file(const char *filename)
+{
+ if (opt_format != FORMAT_XZ && opt_format != FORMAT_AUTO)
+ message_fatal(_("--list works only on .xz files "
+ "(--format=xz or --format=auto)"));
+
+ message_filename(filename);
+
+ if (filename == stdin_filename) {
+ message_error(_("--list does not support reading from "
+ "standard input"));
+ return;
+ }
+
+ init_field_widths();
+
+ // Unset opt_stdout so that io_open_src() won't accept special files.
+ // Set opt_force so that io_open_src() will follow symlinks.
+ opt_stdout = false;
+ opt_force = true;
+ file_pair *pair = io_open_src(filename);
+ if (pair == NULL)
+ return;
+
+ xz_file_info xfi = XZ_FILE_INFO_INIT;
+ if (!parse_indexes(&xfi, pair)) {
+ bool fail;
+
+ // We have three main modes:
+ // - --robot, which has submodes if --verbose is specified
+ // once or twice
+ // - Normal --list without --verbose
+ // - --list with one or two --verbose
+ if (opt_robot)
+ fail = print_info_robot(&xfi, pair);
+ else if (message_verbosity_get() <= V_WARNING)
+ fail = print_info_basic(&xfi, pair);
+ else
+ fail = print_info_adv(&xfi, pair);
+
+ // Update the totals that are displayed after all
+ // the individual files have been listed. Don't count
+ // broken files.
+ if (!fail)
+ update_totals(&xfi);
+
+ lzma_index_end(xfi.idx, NULL);
+ }
+
+ io_close(pair, false);
+ return;
+}
diff --git a/src/xz/list.h b/src/xz/list.h
new file mode 100644
index 0000000..a4c6ec7
--- /dev/null
+++ b/src/xz/list.h
@@ -0,0 +1,18 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file list.h
+/// \brief List information about .xz files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// \brief List information about the given .xz file
+extern void list_file(const char *filename);
+
+
+/// \brief Show the totals after all files have been listed
+extern void list_totals(void);
diff --git a/src/xz/main.c b/src/xz/main.c
new file mode 100644
index 0000000..c9c3dec
--- /dev/null
+++ b/src/xz/main.c
@@ -0,0 +1,344 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file main.c
+/// \brief main()
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+#include <ctype.h>
+
+/// Exit status to use. This can be changed with set_exit_status().
+static enum exit_status_type exit_status = E_SUCCESS;
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+/// exit_status has to be protected with a critical section due to
+/// how "signal handling" is done on Windows. See signals.c for details.
+static CRITICAL_SECTION exit_status_cs;
+#endif
+
+/// True if --no-warn is specified. When this is true, we don't set
+/// the exit status to E_WARNING when something worth a warning happens.
+static bool no_warn = false;
+
+
+extern void
+set_exit_status(enum exit_status_type new_status)
+{
+ assert(new_status == E_WARNING || new_status == E_ERROR);
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ EnterCriticalSection(&exit_status_cs);
+#endif
+
+ if (exit_status != E_ERROR)
+ exit_status = new_status;
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ LeaveCriticalSection(&exit_status_cs);
+#endif
+
+ return;
+}
+
+
+extern void
+set_exit_no_warn(void)
+{
+ no_warn = true;
+ return;
+}
+
+
+static const char *
+read_name(const args_info *args)
+{
+ // FIXME: Maybe we should have some kind of memory usage limit here
+ // like the tool has for the actual compression and decompression.
+ // Giving some huge text file with --files0 makes us to read the
+ // whole file in RAM.
+ static char *name = NULL;
+ static size_t size = 256;
+
+ // Allocate the initial buffer. This is never freed, since after it
+ // is no longer needed, the program exits very soon. It is safe to
+ // use xmalloc() and xrealloc() in this function, because while
+ // executing this function, no files are open for writing, and thus
+ // there's no need to cleanup anything before exiting.
+ if (name == NULL)
+ name = xmalloc(size);
+
+ // Write position in name
+ size_t pos = 0;
+
+ // Read one character at a time into name.
+ while (!user_abort) {
+ const int c = fgetc(args->files_file);
+
+ if (ferror(args->files_file)) {
+ // Take care of EINTR since we have established
+ // the signal handlers already.
+ if (errno == EINTR)
+ continue;
+
+ message_error(_("%s: Error reading filenames: %s"),
+ args->files_name, strerror(errno));
+ return NULL;
+ }
+
+ if (feof(args->files_file)) {
+ if (pos != 0)
+ message_error(_("%s: Unexpected end of input "
+ "when reading filenames"),
+ args->files_name);
+
+ return NULL;
+ }
+
+ if (c == args->files_delim) {
+ // We allow consecutive newline (--files) or '\0'
+ // characters (--files0), and ignore such empty
+ // filenames.
+ if (pos == 0)
+ continue;
+
+ // A non-empty name was read. Terminate it with '\0'
+ // and return it.
+ name[pos] = '\0';
+ return name;
+ }
+
+ if (c == '\0') {
+ // A null character was found when using --files,
+ // which expects plain text input separated with
+ // newlines.
+ message_error(_("%s: Null character found when "
+ "reading filenames; maybe you meant "
+ "to use `--files0' instead "
+ "of `--files'?"), args->files_name);
+ return NULL;
+ }
+
+ name[pos++] = c;
+
+ // Allocate more memory if needed. There must always be space
+ // at least for one character to allow terminating the string
+ // with '\0'.
+ if (pos == size) {
+ size *= 2;
+ name = xrealloc(name, size);
+ }
+ }
+
+ return NULL;
+}
+
+
+int
+main(int argc, char **argv)
+{
+#ifdef HAVE_PLEDGE
+ // OpenBSD's pledge(2) sandbox
+ //
+ // Unconditionally enable sandboxing with fairly relaxed promises.
+ // This is still way better than having no sandbox at all. :-)
+ // More strict promises will be made later in file_io.c if possible.
+ if (pledge("stdio rpath wpath cpath fattr", "")) {
+ // Don't translate the string or use message_fatal() as
+ // those haven't been initialized yet.
+ fprintf(stderr, "%s: Failed to enable the sandbox\n", argv[0]);
+ return E_ERROR;
+ }
+#endif
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ InitializeCriticalSection(&exit_status_cs);
+#endif
+
+ // Set up the progname variable.
+ tuklib_progname_init(argv);
+
+ // Initialize the file I/O. This makes sure that
+ // stdin, stdout, and stderr are something valid.
+ io_init();
+
+ // Set up the locale and message translations.
+ tuklib_gettext_init(PACKAGE, LOCALEDIR);
+
+ // Initialize handling of error/warning/other messages.
+ message_init();
+
+ // Set hardware-dependent default values. These can be overridden
+ // on the command line, thus this must be done before args_parse().
+ hardware_init();
+
+ // Parse the command line arguments and get an array of filenames.
+ // This doesn't return if something is wrong with the command line
+ // arguments. If there are no arguments, one filename ("-") is still
+ // returned to indicate stdin.
+ args_info args;
+ args_parse(&args, argc, argv);
+
+ if (opt_mode != MODE_LIST && opt_robot)
+ message_fatal(_("Compression and decompression with --robot "
+ "are not supported yet."));
+
+ // Tell the message handling code how many input files there are if
+ // we know it. This way the progress indicator can show it.
+ if (args.files_name != NULL)
+ message_set_files(0);
+ else
+ message_set_files(args.arg_count);
+
+ // Refuse to write compressed data to standard output if it is
+ // a terminal.
+ if (opt_mode == MODE_COMPRESS) {
+ if (opt_stdout || (args.arg_count == 1
+ && strcmp(args.arg_names[0], "-") == 0)) {
+ if (is_tty_stdout()) {
+ message_try_help();
+ tuklib_exit(E_ERROR, E_ERROR, false);
+ }
+ }
+ }
+
+ // Set up the signal handlers. We don't need these before we
+ // start the actual action and not in --list mode, so this is
+ // done after parsing the command line arguments.
+ //
+ // It's good to keep signal handlers in normal compression and
+ // decompression modes even when only writing to stdout, because
+ // we might need to restore O_APPEND flag on stdout before exiting.
+ // In --test mode, signal handlers aren't really needed, but let's
+ // keep them there for consistency with normal decompression.
+ if (opt_mode != MODE_LIST)
+ signals_init();
+
+#ifdef ENABLE_SANDBOX
+ // Set a flag that sandboxing is allowed if all these are true:
+ // - --files or --files0 wasn't used.
+ // - There is exactly one input file or we are reading from stdin.
+ // - We won't create any files: output goes to stdout or --test
+ // or --list was used. Note that --test implies opt_stdout = true
+ // but --list doesn't.
+ //
+ // This is obviously not ideal but it was easy to implement and
+ // it covers the most common use cases.
+ //
+ // TODO: Make sandboxing work for other situations too.
+ if (args.files_name == NULL && args.arg_count == 1
+ && (opt_stdout || strcmp("-", args.arg_names[0]) == 0
+ || opt_mode == MODE_LIST))
+ io_allow_sandbox();
+#endif
+
+ // coder_run() handles compression, decompression, and testing.
+ // list_file() is for --list.
+ void (*run)(const char *filename) = &coder_run;
+#ifdef HAVE_DECODERS
+ if (opt_mode == MODE_LIST)
+ run = &list_file;
+#endif
+
+ // Process the files given on the command line. Note that if no names
+ // were given, args_parse() gave us a fake "-" filename.
+ for (unsigned i = 0; i < args.arg_count && !user_abort; ++i) {
+ if (strcmp("-", args.arg_names[i]) == 0) {
+ // Processing from stdin to stdout. Check that we
+ // aren't writing compressed data to a terminal or
+ // reading it from a terminal.
+ if (opt_mode == MODE_COMPRESS) {
+ if (is_tty_stdout())
+ continue;
+ } else if (is_tty_stdin()) {
+ continue;
+ }
+
+ // It doesn't make sense to compress data from stdin
+ // if we are supposed to read filenames from stdin
+ // too (enabled with --files or --files0).
+ if (args.files_name == stdin_filename) {
+ message_error(_("Cannot read data from "
+ "standard input when "
+ "reading filenames "
+ "from standard input"));
+ continue;
+ }
+
+ // Replace the "-" with a special pointer, which is
+ // recognized by coder_run() and other things.
+ // This way error messages get a proper filename
+ // string and the code still knows that it is
+ // handling the special case of stdin.
+ args.arg_names[i] = (char *)stdin_filename;
+ }
+
+ // Do the actual compression or decompression.
+ run(args.arg_names[i]);
+ }
+
+ // If --files or --files0 was used, process the filenames from the
+ // given file or stdin. Note that here we don't consider "-" to
+ // indicate stdin like we do with the command line arguments.
+ if (args.files_name != NULL) {
+ // read_name() checks for user_abort so we don't need to
+ // check it as loop termination condition.
+ while (true) {
+ const char *name = read_name(&args);
+ if (name == NULL)
+ break;
+
+ // read_name() doesn't return empty names.
+ assert(name[0] != '\0');
+ run(name);
+ }
+
+ if (args.files_name != stdin_filename)
+ (void)fclose(args.files_file);
+ }
+
+#ifdef HAVE_DECODERS
+ // All files have now been handled. If in --list mode, display
+ // the totals before exiting. We don't have signal handlers
+ // enabled in --list mode, so we don't need to check user_abort.
+ if (opt_mode == MODE_LIST) {
+ assert(!user_abort);
+ list_totals();
+ }
+#endif
+
+#ifndef NDEBUG
+ coder_free();
+ args_free();
+#endif
+
+ // If we have got a signal, raise it to kill the program instead
+ // of calling tuklib_exit().
+ signals_exit();
+
+ // Make a local copy of exit_status to keep the Windows code
+ // thread safe. At this point it is fine if we miss the user
+ // pressing C-c and don't set the exit_status to E_ERROR on
+ // Windows.
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ EnterCriticalSection(&exit_status_cs);
+#endif
+
+ enum exit_status_type es = exit_status;
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ LeaveCriticalSection(&exit_status_cs);
+#endif
+
+ // Suppress the exit status indicating a warning if --no-warn
+ // was specified.
+ if (es == E_WARNING && no_warn)
+ es = E_SUCCESS;
+
+ tuklib_exit((int)es, E_ERROR, message_verbosity_get() != V_SILENT);
+}
diff --git a/src/xz/main.h b/src/xz/main.h
new file mode 100644
index 0000000..323f2f7
--- /dev/null
+++ b/src/xz/main.h
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file main.h
+/// \brief Miscellaneous declarations
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// Possible exit status values. These are the same as used by gzip and bzip2.
+enum exit_status_type {
+ E_SUCCESS = 0,
+ E_ERROR = 1,
+ E_WARNING = 2,
+};
+
+
+/// Sets the exit status after a warning or error has occurred. If new_status
+/// is E_WARNING and the old exit status was already E_ERROR, the exit
+/// status is not changed.
+extern void set_exit_status(enum exit_status_type new_status);
+
+
+/// Use E_SUCCESS instead of E_WARNING if something worth a warning occurs
+/// but nothing worth an error has occurred. This is called when --no-warn
+/// is specified.
+extern void set_exit_no_warn(void);
diff --git a/src/xz/message.c b/src/xz/message.c
new file mode 100644
index 0000000..abf30ad
--- /dev/null
+++ b/src/xz/message.c
@@ -0,0 +1,1146 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file message.c
+/// \brief Printing messages
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+#include <stdarg.h>
+
+
+/// Number of the current file
+static unsigned int files_pos = 0;
+
+/// Total number of input files; zero if unknown.
+static unsigned int files_total;
+
+/// Verbosity level
+static enum message_verbosity verbosity = V_WARNING;
+
+/// Filename which we will print with the verbose messages
+static const char *filename;
+
+/// True once the a filename has been printed to stderr as part of progress
+/// message. If automatic progress updating isn't enabled, this becomes true
+/// after the first progress message has been printed due to user sending
+/// SIGINFO, SIGUSR1, or SIGALRM. Once this variable is true, we will print
+/// an empty line before the next filename to make the output more readable.
+static bool first_filename_printed = false;
+
+/// This is set to true when we have printed the current filename to stderr
+/// as part of a progress message. This variable is useful only if not
+/// updating progress automatically: if user sends many SIGINFO, SIGUSR1, or
+/// SIGALRM signals, we won't print the name of the same file multiple times.
+static bool current_filename_printed = false;
+
+/// True if we should print progress indicator and update it automatically
+/// if also verbose >= V_VERBOSE.
+static bool progress_automatic;
+
+/// True if message_progress_start() has been called but
+/// message_progress_end() hasn't been called yet.
+static bool progress_started = false;
+
+/// This is true when a progress message was printed and the cursor is still
+/// on the same line with the progress message. In that case, a newline has
+/// to be printed before any error messages.
+static bool progress_active = false;
+
+/// Pointer to lzma_stream used to do the encoding or decoding.
+static lzma_stream *progress_strm;
+
+/// This is true if we are in passthru mode (not actually compressing or
+/// decompressing) and thus cannot use lzma_get_progress(progress_strm, ...).
+/// That is, we are using coder_passthru() in coder.c.
+static bool progress_is_from_passthru;
+
+/// Expected size of the input stream is needed to show completion percentage
+/// and estimate remaining time.
+static uint64_t expected_in_size;
+
+
+// Use alarm() and SIGALRM when they are supported. This has two minor
+// advantages over the alternative of polling gettimeofday():
+// - It is possible for the user to send SIGINFO, SIGUSR1, or SIGALRM to
+// get intermediate progress information even when --verbose wasn't used
+// or stderr is not a terminal.
+// - alarm() + SIGALRM seems to have slightly less overhead than polling
+// gettimeofday().
+#ifdef SIGALRM
+
+const int message_progress_sigs[] = {
+ SIGALRM,
+#ifdef SIGINFO
+ SIGINFO,
+#endif
+#ifdef SIGUSR1
+ SIGUSR1,
+#endif
+ 0
+};
+
+/// The signal handler for SIGALRM sets this to true. It is set back to false
+/// once the progress message has been updated.
+static volatile sig_atomic_t progress_needs_updating = false;
+
+/// Signal handler for SIGALRM
+static void
+progress_signal_handler(int sig lzma_attribute((__unused__)))
+{
+ progress_needs_updating = true;
+ return;
+}
+
+#else
+
+/// This is true when progress message printing is wanted. Using the same
+/// variable name as above to avoid some ifdefs.
+static bool progress_needs_updating = false;
+
+/// Elapsed time when the next progress message update should be done.
+static uint64_t progress_next_update;
+
+#endif
+
+
+extern void
+message_init(void)
+{
+ // If --verbose is used, we use a progress indicator if and only
+ // if stderr is a terminal. If stderr is not a terminal, we print
+ // verbose information only after finishing the file. As a special
+ // exception, even if --verbose was not used, user can send SIGALRM
+ // to make us print progress information once without automatic
+ // updating.
+ progress_automatic = isatty(STDERR_FILENO);
+
+ // Commented out because COLUMNS is rarely exported to environment.
+ // Most users have at least 80 columns anyway, let's think something
+ // fancy here if enough people complain.
+/*
+ if (progress_automatic) {
+ // stderr is a terminal. Check the COLUMNS environment
+ // variable to see if the terminal is wide enough. If COLUMNS
+ // doesn't exist or it has some unparsable value, we assume
+ // that the terminal is wide enough.
+ const char *columns_str = getenv("COLUMNS");
+ if (columns_str != NULL) {
+ char *endptr;
+ const long columns = strtol(columns_str, &endptr, 10);
+ if (*endptr != '\0' || columns < 80)
+ progress_automatic = false;
+ }
+ }
+*/
+
+#ifdef SIGALRM
+ // Establish the signal handlers which set a flag to tell us that
+ // progress info should be updated.
+ struct sigaction sa;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+ sa.sa_handler = &progress_signal_handler;
+
+ for (size_t i = 0; message_progress_sigs[i] != 0; ++i)
+ if (sigaction(message_progress_sigs[i], &sa, NULL))
+ message_signal_handler();
+#endif
+
+ return;
+}
+
+
+extern void
+message_verbosity_increase(void)
+{
+ if (verbosity < V_DEBUG)
+ ++verbosity;
+
+ return;
+}
+
+
+extern void
+message_verbosity_decrease(void)
+{
+ if (verbosity > V_SILENT)
+ --verbosity;
+
+ return;
+}
+
+
+extern enum message_verbosity
+message_verbosity_get(void)
+{
+ return verbosity;
+}
+
+
+extern void
+message_set_files(unsigned int files)
+{
+ files_total = files;
+ return;
+}
+
+
+/// Prints the name of the current file if it hasn't been printed already,
+/// except if we are processing exactly one stream from stdin to stdout.
+/// I think it looks nicer to not print "(stdin)" when --verbose is used
+/// in a pipe and no other files are processed.
+static void
+print_filename(void)
+{
+ if (!opt_robot && (files_total != 1 || filename != stdin_filename)) {
+ signals_block();
+
+ FILE *file = opt_mode == MODE_LIST ? stdout : stderr;
+
+ // If a file was already processed, put an empty line
+ // before the next filename to improve readability.
+ if (first_filename_printed)
+ fputc('\n', file);
+
+ first_filename_printed = true;
+ current_filename_printed = true;
+
+ // If we don't know how many files there will be due
+ // to usage of --files or --files0.
+ if (files_total == 0)
+ fprintf(file, "%s (%u)\n", filename,
+ files_pos);
+ else
+ fprintf(file, "%s (%u/%u)\n", filename,
+ files_pos, files_total);
+
+ signals_unblock();
+ }
+
+ return;
+}
+
+
+extern void
+message_filename(const char *src_name)
+{
+ // Start numbering the files starting from one.
+ ++files_pos;
+ filename = src_name;
+
+ if (verbosity >= V_VERBOSE
+ && (progress_automatic || opt_mode == MODE_LIST))
+ print_filename();
+ else
+ current_filename_printed = false;
+
+ return;
+}
+
+
+extern void
+message_progress_start(lzma_stream *strm, bool is_passthru, uint64_t in_size)
+{
+ // Store the pointer to the lzma_stream used to do the coding.
+ // It is needed to find out the position in the stream.
+ progress_strm = strm;
+ progress_is_from_passthru = is_passthru;
+
+ // Store the expected size of the file. If we aren't printing any
+ // statistics, then is will be unused. But since it is possible
+ // that the user sends us a signal to show statistics, we need
+ // to have it available anyway.
+ expected_in_size = in_size;
+
+ // Indicate that progress info may need to be printed before
+ // printing error messages.
+ progress_started = true;
+
+ // If progress indicator is wanted, print the filename and possibly
+ // the file count now.
+ if (verbosity >= V_VERBOSE && progress_automatic) {
+ // Start the timer to display the first progress message
+ // after one second. An alternative would be to show the
+ // first message almost immediately, but delaying by one
+ // second looks better to me, since extremely early
+ // progress info is pretty much useless.
+#ifdef SIGALRM
+ // First disable a possibly existing alarm.
+ alarm(0);
+ progress_needs_updating = false;
+ alarm(1);
+#else
+ progress_needs_updating = true;
+ progress_next_update = 1000;
+#endif
+ }
+
+ return;
+}
+
+
+/// Make the string indicating completion percentage.
+static const char *
+progress_percentage(uint64_t in_pos)
+{
+ // If the size of the input file is unknown or the size told us is
+ // clearly wrong since we have processed more data than the alleged
+ // size of the file, show a static string indicating that we have
+ // no idea of the completion percentage.
+ if (expected_in_size == 0 || in_pos > expected_in_size)
+ return "--- %";
+
+ // Never show 100.0 % before we actually are finished.
+ double percentage = (double)(in_pos) / (double)(expected_in_size)
+ * 99.9;
+
+ // Use big enough buffer to hold e.g. a multibyte decimal point.
+ static char buf[16];
+ snprintf(buf, sizeof(buf), "%.1f %%", percentage);
+
+ return buf;
+}
+
+
+/// Make the string containing the amount of input processed, amount of
+/// output produced, and the compression ratio.
+static const char *
+progress_sizes(uint64_t compressed_pos, uint64_t uncompressed_pos, bool final)
+{
+ // Use big enough buffer to hold e.g. a multibyte thousand separators.
+ static char buf[128];
+ char *pos = buf;
+ size_t left = sizeof(buf);
+
+ // Print the sizes. If this the final message, use more reasonable
+ // units than MiB if the file was small.
+ const enum nicestr_unit unit_min = final ? NICESTR_B : NICESTR_MIB;
+ my_snprintf(&pos, &left, "%s / %s",
+ uint64_to_nicestr(compressed_pos,
+ unit_min, NICESTR_TIB, false, 0),
+ uint64_to_nicestr(uncompressed_pos,
+ unit_min, NICESTR_TIB, false, 1));
+
+ // Avoid division by zero. If we cannot calculate the ratio, set
+ // it to some nice number greater than 10.0 so that it gets caught
+ // in the next if-clause.
+ const double ratio = uncompressed_pos > 0
+ ? (double)(compressed_pos) / (double)(uncompressed_pos)
+ : 16.0;
+
+ // If the ratio is very bad, just indicate that it is greater than
+ // 9.999. This way the length of the ratio field stays fixed.
+ if (ratio > 9.999)
+ snprintf(pos, left, " > %.3f", 9.999);
+ else
+ snprintf(pos, left, " = %.3f", ratio);
+
+ return buf;
+}
+
+
+/// Make the string containing the processing speed of uncompressed data.
+static const char *
+progress_speed(uint64_t uncompressed_pos, uint64_t elapsed)
+{
+ // Don't print the speed immediately, since the early values look
+ // somewhat random.
+ if (elapsed < 3000)
+ return "";
+
+ // The first character of KiB/s, MiB/s, or GiB/s:
+ static const char unit[] = { 'K', 'M', 'G' };
+
+ size_t unit_index = 0;
+
+ // Calculate the speed as KiB/s.
+ double speed = (double)(uncompressed_pos)
+ / ((double)(elapsed) * (1024.0 / 1000.0));
+
+ // Adjust the unit of the speed if needed.
+ while (speed > 999.0) {
+ speed /= 1024.0;
+ if (++unit_index == ARRAY_SIZE(unit))
+ return ""; // Way too fast ;-)
+ }
+
+ // Use decimal point only if the number is small. Examples:
+ // - 0.1 KiB/s
+ // - 9.9 KiB/s
+ // - 99 KiB/s
+ // - 999 KiB/s
+ // Use big enough buffer to hold e.g. a multibyte decimal point.
+ static char buf[16];
+ snprintf(buf, sizeof(buf), "%.*f %ciB/s",
+ speed > 9.9 ? 0 : 1, speed, unit[unit_index]);
+ return buf;
+}
+
+
+/// Make a string indicating elapsed time. The format is either
+/// M:SS or H:MM:SS depending on if the time is an hour or more.
+static const char *
+progress_time(uint64_t mseconds)
+{
+ // 9999 hours = 416 days
+ static char buf[sizeof("9999:59:59")];
+
+ // 32-bit variable is enough for elapsed time (136 years).
+ uint32_t seconds = (uint32_t)(mseconds / 1000);
+
+ // Don't show anything if the time is zero or ridiculously big.
+ if (seconds == 0 || seconds > ((9999 * 60) + 59) * 60 + 59)
+ return "";
+
+ uint32_t minutes = seconds / 60;
+ seconds %= 60;
+
+ if (minutes >= 60) {
+ const uint32_t hours = minutes / 60;
+ minutes %= 60;
+ snprintf(buf, sizeof(buf),
+ "%" PRIu32 ":%02" PRIu32 ":%02" PRIu32,
+ hours, minutes, seconds);
+ } else {
+ snprintf(buf, sizeof(buf), "%" PRIu32 ":%02" PRIu32,
+ minutes, seconds);
+ }
+
+ return buf;
+}
+
+
+/// Return a string containing estimated remaining time when
+/// reasonably possible.
+static const char *
+progress_remaining(uint64_t in_pos, uint64_t elapsed)
+{
+ // Don't show the estimated remaining time when it wouldn't
+ // make sense:
+ // - Input size is unknown.
+ // - Input has grown bigger since we started (de)compressing.
+ // - We haven't processed much data yet, so estimate would be
+ // too inaccurate.
+ // - Only a few seconds has passed since we started (de)compressing,
+ // so estimate would be too inaccurate.
+ if (expected_in_size == 0 || in_pos > expected_in_size
+ || in_pos < (UINT64_C(1) << 19) || elapsed < 8000)
+ return "";
+
+ // Calculate the estimate. Don't give an estimate of zero seconds,
+ // since it is possible that all the input has been already passed
+ // to the library, but there is still quite a bit of output pending.
+ uint32_t remaining = (uint32_t)((double)(expected_in_size - in_pos)
+ * ((double)(elapsed) / 1000.0) / (double)(in_pos));
+ if (remaining < 1)
+ remaining = 1;
+
+ static char buf[sizeof("9 h 55 min")];
+
+ // Select appropriate precision for the estimated remaining time.
+ if (remaining <= 10) {
+ // A maximum of 10 seconds remaining.
+ // Show the number of seconds as is.
+ snprintf(buf, sizeof(buf), "%" PRIu32 " s", remaining);
+
+ } else if (remaining <= 50) {
+ // A maximum of 50 seconds remaining.
+ // Round up to the next multiple of five seconds.
+ remaining = (remaining + 4) / 5 * 5;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " s", remaining);
+
+ } else if (remaining <= 590) {
+ // A maximum of 9 minutes and 50 seconds remaining.
+ // Round up to the next multiple of ten seconds.
+ remaining = (remaining + 9) / 10 * 10;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " min %" PRIu32 " s",
+ remaining / 60, remaining % 60);
+
+ } else if (remaining <= 59 * 60) {
+ // A maximum of 59 minutes remaining.
+ // Round up to the next multiple of a minute.
+ remaining = (remaining + 59) / 60;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " min", remaining);
+
+ } else if (remaining <= 9 * 3600 + 50 * 60) {
+ // A maximum of 9 hours and 50 minutes left.
+ // Round up to the next multiple of ten minutes.
+ remaining = (remaining + 599) / 600 * 10;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " h %" PRIu32 " min",
+ remaining / 60, remaining % 60);
+
+ } else if (remaining <= 23 * 3600) {
+ // A maximum of 23 hours remaining.
+ // Round up to the next multiple of an hour.
+ remaining = (remaining + 3599) / 3600;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " h", remaining);
+
+ } else if (remaining <= 9 * 24 * 3600 + 23 * 3600) {
+ // A maximum of 9 days and 23 hours remaining.
+ // Round up to the next multiple of an hour.
+ remaining = (remaining + 3599) / 3600;
+ snprintf(buf, sizeof(buf), "%" PRIu32 " d %" PRIu32 " h",
+ remaining / 24, remaining % 24);
+
+ } else if (remaining <= 999 * 24 * 3600) {
+ // A maximum of 999 days remaining. ;-)
+ // Round up to the next multiple of a day.
+ remaining = (remaining + 24 * 3600 - 1) / (24 * 3600);
+ snprintf(buf, sizeof(buf), "%" PRIu32 " d", remaining);
+
+ } else {
+ // The estimated remaining time is too big. Don't show it.
+ return "";
+ }
+
+ return buf;
+}
+
+
+/// Get how much uncompressed and compressed data has been processed.
+static void
+progress_pos(uint64_t *in_pos,
+ uint64_t *compressed_pos, uint64_t *uncompressed_pos)
+{
+ uint64_t out_pos;
+ if (progress_is_from_passthru) {
+ // In passthru mode the progress info is in total_in/out but
+ // the *progress_strm itself isn't initialized and thus we
+ // cannot use lzma_get_progress().
+ *in_pos = progress_strm->total_in;
+ out_pos = progress_strm->total_out;
+ } else {
+ lzma_get_progress(progress_strm, in_pos, &out_pos);
+ }
+
+ // It cannot have processed more input than it has been given.
+ assert(*in_pos <= progress_strm->total_in);
+
+ // It cannot have produced more output than it claims to have ready.
+ assert(out_pos >= progress_strm->total_out);
+
+ if (opt_mode == MODE_COMPRESS) {
+ *compressed_pos = out_pos;
+ *uncompressed_pos = *in_pos;
+ } else {
+ *compressed_pos = *in_pos;
+ *uncompressed_pos = out_pos;
+ }
+
+ return;
+}
+
+
+extern void
+message_progress_update(void)
+{
+ if (!progress_needs_updating)
+ return;
+
+ // Calculate how long we have been processing this file.
+ const uint64_t elapsed = mytime_get_elapsed();
+
+#ifndef SIGALRM
+ if (progress_next_update > elapsed)
+ return;
+
+ progress_next_update = elapsed + 1000;
+#endif
+
+ // Get our current position in the stream.
+ uint64_t in_pos;
+ uint64_t compressed_pos;
+ uint64_t uncompressed_pos;
+ progress_pos(&in_pos, &compressed_pos, &uncompressed_pos);
+
+ // Block signals so that fprintf() doesn't get interrupted.
+ signals_block();
+
+ // Print the filename if it hasn't been printed yet.
+ if (!current_filename_printed)
+ print_filename();
+
+ // Print the actual progress message. The idea is that there is at
+ // least three spaces between the fields in typical situations, but
+ // even in rare situations there is at least one space.
+ const char *cols[5] = {
+ progress_percentage(in_pos),
+ progress_sizes(compressed_pos, uncompressed_pos, false),
+ progress_speed(uncompressed_pos, elapsed),
+ progress_time(elapsed),
+ progress_remaining(in_pos, elapsed),
+ };
+ fprintf(stderr, "\r %*s %*s %*s %10s %10s\r",
+ tuklib_mbstr_fw(cols[0], 6), cols[0],
+ tuklib_mbstr_fw(cols[1], 35), cols[1],
+ tuklib_mbstr_fw(cols[2], 9), cols[2],
+ cols[3],
+ cols[4]);
+
+#ifdef SIGALRM
+ // Updating the progress info was finished. Reset
+ // progress_needs_updating to wait for the next SIGALRM.
+ //
+ // NOTE: This has to be done before alarm(1) or with (very) bad
+ // luck we could be setting this to false after the alarm has already
+ // been triggered.
+ progress_needs_updating = false;
+
+ if (verbosity >= V_VERBOSE && progress_automatic) {
+ // Mark that the progress indicator is active, so if an error
+ // occurs, the error message gets printed cleanly.
+ progress_active = true;
+
+ // Restart the timer so that progress_needs_updating gets
+ // set to true after about one second.
+ alarm(1);
+ } else {
+ // The progress message was printed because user had sent us
+ // SIGALRM. In this case, each progress message is printed
+ // on its own line.
+ fputc('\n', stderr);
+ }
+#else
+ // When SIGALRM isn't supported and we get here, it's always due to
+ // automatic progress update. We set progress_active here too like
+ // described above.
+ assert(verbosity >= V_VERBOSE);
+ assert(progress_automatic);
+ progress_active = true;
+#endif
+
+ signals_unblock();
+
+ return;
+}
+
+
+static void
+progress_flush(bool finished)
+{
+ if (!progress_started || verbosity < V_VERBOSE)
+ return;
+
+ uint64_t in_pos;
+ uint64_t compressed_pos;
+ uint64_t uncompressed_pos;
+ progress_pos(&in_pos, &compressed_pos, &uncompressed_pos);
+
+ // Avoid printing intermediate progress info if some error occurs
+ // in the beginning of the stream. (If something goes wrong later in
+ // the stream, it is sometimes useful to tell the user where the
+ // error approximately occurred, especially if the error occurs
+ // after a time-consuming operation.)
+ if (!finished && !progress_active
+ && (compressed_pos == 0 || uncompressed_pos == 0))
+ return;
+
+ progress_active = false;
+
+ const uint64_t elapsed = mytime_get_elapsed();
+
+ signals_block();
+
+ // When using the auto-updating progress indicator, the final
+ // statistics are printed in the same format as the progress
+ // indicator itself.
+ if (progress_automatic) {
+ const char *cols[5] = {
+ finished ? "100 %" : progress_percentage(in_pos),
+ progress_sizes(compressed_pos, uncompressed_pos, true),
+ progress_speed(uncompressed_pos, elapsed),
+ progress_time(elapsed),
+ finished ? "" : progress_remaining(in_pos, elapsed),
+ };
+ fprintf(stderr, "\r %*s %*s %*s %10s %10s\n",
+ tuklib_mbstr_fw(cols[0], 6), cols[0],
+ tuklib_mbstr_fw(cols[1], 35), cols[1],
+ tuklib_mbstr_fw(cols[2], 9), cols[2],
+ cols[3],
+ cols[4]);
+ } else {
+ // The filename is always printed.
+ fprintf(stderr, _("%s: "), filename);
+
+ // Percentage is printed only if we didn't finish yet.
+ if (!finished) {
+ // Don't print the percentage when it isn't known
+ // (starts with a dash).
+ const char *percentage = progress_percentage(in_pos);
+ if (percentage[0] != '-')
+ fprintf(stderr, "%s, ", percentage);
+ }
+
+ // Size information is always printed.
+ fprintf(stderr, "%s", progress_sizes(
+ compressed_pos, uncompressed_pos, true));
+
+ // The speed and elapsed time aren't always shown.
+ const char *speed = progress_speed(uncompressed_pos, elapsed);
+ if (speed[0] != '\0')
+ fprintf(stderr, ", %s", speed);
+
+ const char *elapsed_str = progress_time(elapsed);
+ if (elapsed_str[0] != '\0')
+ fprintf(stderr, ", %s", elapsed_str);
+
+ fputc('\n', stderr);
+ }
+
+ signals_unblock();
+
+ return;
+}
+
+
+extern void
+message_progress_end(bool success)
+{
+ assert(progress_started);
+ progress_flush(success);
+ progress_started = false;
+ return;
+}
+
+
+static void
+vmessage(enum message_verbosity v, const char *fmt, va_list ap)
+{
+ if (v <= verbosity) {
+ signals_block();
+
+ progress_flush(false);
+
+ // TRANSLATORS: This is the program name in the beginning
+ // of the line in messages. Usually it becomes "xz: ".
+ // This is a translatable string because French needs
+ // a space before a colon.
+ fprintf(stderr, _("%s: "), progname);
+
+#ifdef __clang__
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wformat-nonliteral"
+#endif
+ vfprintf(stderr, fmt, ap);
+#ifdef __clang__
+# pragma GCC diagnostic pop
+#endif
+
+ fputc('\n', stderr);
+
+ signals_unblock();
+ }
+
+ return;
+}
+
+
+extern void
+message(enum message_verbosity v, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vmessage(v, fmt, ap);
+ va_end(ap);
+ return;
+}
+
+
+extern void
+message_warning(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vmessage(V_WARNING, fmt, ap);
+ va_end(ap);
+
+ set_exit_status(E_WARNING);
+ return;
+}
+
+
+extern void
+message_error(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vmessage(V_ERROR, fmt, ap);
+ va_end(ap);
+
+ set_exit_status(E_ERROR);
+ return;
+}
+
+
+extern void
+message_fatal(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vmessage(V_ERROR, fmt, ap);
+ va_end(ap);
+
+ tuklib_exit(E_ERROR, E_ERROR, false);
+}
+
+
+extern void
+message_bug(void)
+{
+ message_fatal(_("Internal error (bug)"));
+}
+
+
+extern void
+message_signal_handler(void)
+{
+ message_fatal(_("Cannot establish signal handlers"));
+}
+
+
+extern const char *
+message_strm(lzma_ret code)
+{
+ switch (code) {
+ case LZMA_NO_CHECK:
+ return _("No integrity check; not verifying file integrity");
+
+ case LZMA_UNSUPPORTED_CHECK:
+ return _("Unsupported type of integrity check; "
+ "not verifying file integrity");
+
+ case LZMA_MEM_ERROR:
+ return strerror(ENOMEM);
+
+ case LZMA_MEMLIMIT_ERROR:
+ return _("Memory usage limit reached");
+
+ case LZMA_FORMAT_ERROR:
+ return _("File format not recognized");
+
+ case LZMA_OPTIONS_ERROR:
+ return _("Unsupported options");
+
+ case LZMA_DATA_ERROR:
+ return _("Compressed data is corrupt");
+
+ case LZMA_BUF_ERROR:
+ return _("Unexpected end of input");
+
+ case LZMA_OK:
+ case LZMA_STREAM_END:
+ case LZMA_GET_CHECK:
+ case LZMA_PROG_ERROR:
+ case LZMA_SEEK_NEEDED:
+ case LZMA_RET_INTERNAL1:
+ case LZMA_RET_INTERNAL2:
+ case LZMA_RET_INTERNAL3:
+ case LZMA_RET_INTERNAL4:
+ case LZMA_RET_INTERNAL5:
+ case LZMA_RET_INTERNAL6:
+ case LZMA_RET_INTERNAL7:
+ case LZMA_RET_INTERNAL8:
+ // Without "default", compiler will warn if new constants
+ // are added to lzma_ret, it is not too easy to forget to
+ // add the new constants to this function.
+ break;
+ }
+
+ return _("Internal error (bug)");
+}
+
+
+extern void
+message_mem_needed(enum message_verbosity v, uint64_t memusage)
+{
+ if (v > verbosity)
+ return;
+
+ // Convert memusage to MiB, rounding up to the next full MiB.
+ // This way the user can always use the displayed usage as
+ // the new memory usage limit. (If we rounded to the nearest,
+ // the user might need to +1 MiB to get high enough limit.)
+ memusage = round_up_to_mib(memusage);
+
+ uint64_t memlimit = hardware_memlimit_get(opt_mode);
+
+ // Handle the case when there is no memory usage limit.
+ // This way we don't print a weird message with a huge number.
+ if (memlimit == UINT64_MAX) {
+ message(v, _("%s MiB of memory is required. "
+ "The limiter is disabled."),
+ uint64_to_str(memusage, 0));
+ return;
+ }
+
+ // With US-ASCII:
+ // 2^64 with thousand separators + " MiB" suffix + '\0' = 26 + 4 + 1
+ // But there may be multibyte chars so reserve enough space.
+ char memlimitstr[128];
+
+ // Show the memory usage limit as MiB unless it is less than 1 MiB.
+ // This way it's easy to notice errors where one has typed
+ // --memory=123 instead of --memory=123MiB.
+ if (memlimit < (UINT32_C(1) << 20)) {
+ snprintf(memlimitstr, sizeof(memlimitstr), "%s B",
+ uint64_to_str(memlimit, 1));
+ } else {
+ // Round up just like with memusage. If this function is
+ // called for informational purposes (to just show the
+ // current usage and limit), we should never show that
+ // the usage is higher than the limit, which would give
+ // a false impression that the memory usage limit isn't
+ // properly enforced.
+ snprintf(memlimitstr, sizeof(memlimitstr), "%s MiB",
+ uint64_to_str(round_up_to_mib(memlimit), 1));
+ }
+
+ message(v, _("%s MiB of memory is required. The limit is %s."),
+ uint64_to_str(memusage, 0), memlimitstr);
+
+ return;
+}
+
+
+extern void
+message_filters_show(enum message_verbosity v, const lzma_filter *filters)
+{
+ if (v > verbosity)
+ return;
+
+ char *buf;
+ const lzma_ret ret = lzma_str_from_filters(&buf, filters,
+ LZMA_STR_ENCODER | LZMA_STR_GETOPT_LONG, NULL);
+ if (ret != LZMA_OK)
+ message_fatal("%s", message_strm(ret));
+
+ fprintf(stderr, _("%s: Filter chain: %s\n"), progname, buf);
+ free(buf);
+ return;
+}
+
+
+extern void
+message_try_help(void)
+{
+ // Print this with V_WARNING instead of V_ERROR to prevent it from
+ // showing up when --quiet has been specified.
+ message(V_WARNING, _("Try `%s --help' for more information."),
+ progname);
+ return;
+}
+
+
+extern void
+message_version(void)
+{
+ // It is possible that liblzma version is different than the command
+ // line tool version, so print both.
+ if (opt_robot) {
+ printf("XZ_VERSION=%" PRIu32 "\nLIBLZMA_VERSION=%" PRIu32 "\n",
+ LZMA_VERSION, lzma_version_number());
+ } else {
+ printf("xz (" PACKAGE_NAME ") " LZMA_VERSION_STRING "\n");
+ printf("liblzma %s\n", lzma_version_string());
+ }
+
+ tuklib_exit(E_SUCCESS, E_ERROR, verbosity != V_SILENT);
+}
+
+
+extern void
+message_help(bool long_help)
+{
+ printf(_("Usage: %s [OPTION]... [FILE]...\n"
+ "Compress or decompress FILEs in the .xz format.\n\n"),
+ progname);
+
+ // NOTE: The short help doesn't currently have options that
+ // take arguments.
+ if (long_help)
+ puts(_("Mandatory arguments to long options are mandatory "
+ "for short options too.\n"));
+
+ if (long_help)
+ puts(_(" Operation mode:\n"));
+
+ puts(_(
+" -z, --compress force compression\n"
+" -d, --decompress force decompression\n"
+" -t, --test test compressed file integrity\n"
+" -l, --list list information about .xz files"));
+
+ if (long_help)
+ puts(_("\n Operation modifiers:\n"));
+
+ puts(_(
+" -k, --keep keep (don't delete) input files\n"
+" -f, --force force overwrite of output file and (de)compress links\n"
+" -c, --stdout write to standard output and don't delete input files"));
+ // NOTE: --to-stdout isn't included above because it's not
+ // the recommended spelling. It was copied from gzip but other
+ // compressors with gzip-like syntax don't support it.
+
+ if (long_help) {
+ puts(_(
+" --single-stream decompress only the first stream, and silently\n"
+" ignore possible remaining input data"));
+ puts(_(
+" --no-sparse do not create sparse files when decompressing\n"
+" -S, --suffix=.SUF use the suffix `.SUF' on compressed files\n"
+" --files[=FILE] read filenames to process from FILE; if FILE is\n"
+" omitted, filenames are read from the standard input;\n"
+" filenames must be terminated with the newline character\n"
+" --files0[=FILE] like --files but use the null character as terminator"));
+ }
+
+ if (long_help) {
+ puts(_("\n Basic file format and compression options:\n"));
+ puts(_(
+" -F, --format=FMT file format to encode or decode; possible values are\n"
+" `auto' (default), `xz', `lzma', `lzip', and `raw'\n"
+" -C, --check=CHECK integrity check type: `none' (use with caution),\n"
+" `crc32', `crc64' (default), or `sha256'"));
+ puts(_(
+" --ignore-check don't verify the integrity check when decompressing"));
+ }
+
+ puts(_(
+" -0 ... -9 compression preset; default is 6; take compressor *and*\n"
+" decompressor memory usage into account before using 7-9!"));
+
+ puts(_(
+" -e, --extreme try to improve compression ratio by using more CPU time;\n"
+" does not affect decompressor memory requirements"));
+
+ puts(_(
+" -T, --threads=NUM use at most NUM threads; the default is 1; set to 0\n"
+" to use as many threads as there are processor cores"));
+
+ if (long_help) {
+ puts(_(
+" --block-size=SIZE\n"
+" start a new .xz block after every SIZE bytes of input;\n"
+" use this to set the block size for threaded compression"));
+ puts(_(
+" --block-list=SIZES\n"
+" start a new .xz block after the given comma-separated\n"
+" intervals of uncompressed data"));
+ puts(_(
+" --flush-timeout=TIMEOUT\n"
+" when compressing, if more than TIMEOUT milliseconds has\n"
+" passed since the previous flush and reading more input\n"
+" would block, all pending data is flushed out"
+ ));
+ puts(_( // xgettext:no-c-format
+" --memlimit-compress=LIMIT\n"
+" --memlimit-decompress=LIMIT\n"
+" --memlimit-mt-decompress=LIMIT\n"
+" -M, --memlimit=LIMIT\n"
+" set memory usage limit for compression, decompression,\n"
+" threaded decompression, or all of these; LIMIT is in\n"
+" bytes, % of RAM, or 0 for defaults"));
+
+ puts(_(
+" --no-adjust if compression settings exceed the memory usage limit,\n"
+" give an error instead of adjusting the settings downwards"));
+ }
+
+ if (long_help) {
+ puts(_(
+"\n Custom filter chain for compression (alternative for using presets):"));
+
+#if defined(HAVE_ENCODER_LZMA1) || defined(HAVE_DECODER_LZMA1) \
+ || defined(HAVE_ENCODER_LZMA2) || defined(HAVE_DECODER_LZMA2)
+ // TRANSLATORS: The word "literal" in "literal context bits"
+ // means how many "context bits" to use when encoding
+ // literals. A literal is a single 8-bit byte. It doesn't
+ // mean "literally" here.
+ puts(_(
+"\n"
+" --lzma1[=OPTS] LZMA1 or LZMA2; OPTS is a comma-separated list of zero or\n"
+" --lzma2[=OPTS] more of the following options (valid values; default):\n"
+" preset=PRE reset options to a preset (0-9[e])\n"
+" dict=NUM dictionary size (4KiB - 1536MiB; 8MiB)\n"
+" lc=NUM number of literal context bits (0-4; 3)\n"
+" lp=NUM number of literal position bits (0-4; 0)\n"
+" pb=NUM number of position bits (0-4; 2)\n"
+" mode=MODE compression mode (fast, normal; normal)\n"
+" nice=NUM nice length of a match (2-273; 64)\n"
+" mf=NAME match finder (hc3, hc4, bt2, bt3, bt4; bt4)\n"
+" depth=NUM maximum search depth; 0=automatic (default)"));
+#endif
+
+ puts(_(
+"\n"
+" --x86[=OPTS] x86 BCJ filter (32-bit and 64-bit)\n"
+" --arm[=OPTS] ARM BCJ filter\n"
+" --armthumb[=OPTS] ARM-Thumb BCJ filter\n"
+" --arm64[=OPTS] ARM64 BCJ filter\n"
+" --powerpc[=OPTS] PowerPC BCJ filter (big endian only)\n"
+" --ia64[=OPTS] IA-64 (Itanium) BCJ filter\n"
+" --sparc[=OPTS] SPARC BCJ filter\n"
+" Valid OPTS for all BCJ filters:\n"
+" start=NUM start offset for conversions (default=0)"));
+
+#if defined(HAVE_ENCODER_DELTA) || defined(HAVE_DECODER_DELTA)
+ puts(_(
+"\n"
+" --delta[=OPTS] Delta filter; valid OPTS (valid values; default):\n"
+" dist=NUM distance between bytes being subtracted\n"
+" from each other (1-256; 1)"));
+#endif
+ }
+
+ if (long_help)
+ puts(_("\n Other options:\n"));
+
+ puts(_(
+" -q, --quiet suppress warnings; specify twice to suppress errors too\n"
+" -v, --verbose be verbose; specify twice for even more verbose"));
+
+ if (long_help) {
+ puts(_(
+" -Q, --no-warn make warnings not affect the exit status"));
+ puts(_(
+" --robot use machine-parsable messages (useful for scripts)"));
+ puts("");
+ puts(_(
+" --info-memory display the total amount of RAM and the currently active\n"
+" memory usage limits, and exit"));
+ puts(_(
+" -h, --help display the short help (lists only the basic options)\n"
+" -H, --long-help display this long help and exit"));
+ } else {
+ puts(_(
+" -h, --help display this short help and exit\n"
+" -H, --long-help display the long help (lists also the advanced options)"));
+ }
+
+ puts(_(
+" -V, --version display the version number and exit"));
+
+ puts(_("\nWith no FILE, or when FILE is -, read standard input.\n"));
+
+ // TRANSLATORS: This message indicates the bug reporting address
+ // for this package. Please add _another line_ saying
+ // "Report translation bugs to <...>\n" with the email or WWW
+ // address for translation bugs. Thanks.
+ printf(_("Report bugs to <%s> (in English or Finnish).\n"),
+ PACKAGE_BUGREPORT);
+ printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
+
+#if LZMA_VERSION_STABILITY != LZMA_VERSION_STABILITY_STABLE
+ puts(_(
+"THIS IS A DEVELOPMENT VERSION NOT INTENDED FOR PRODUCTION USE."));
+#endif
+
+ tuklib_exit(E_SUCCESS, E_ERROR, verbosity != V_SILENT);
+}
diff --git a/src/xz/message.h b/src/xz/message.h
new file mode 100644
index 0000000..f608ec7
--- /dev/null
+++ b/src/xz/message.h
@@ -0,0 +1,156 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file message.h
+/// \brief Printing messages to stderr
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// Verbosity levels
+enum message_verbosity {
+ V_SILENT, ///< No messages
+ V_ERROR, ///< Only error messages
+ V_WARNING, ///< Errors and warnings
+ V_VERBOSE, ///< Errors, warnings, and verbose statistics
+ V_DEBUG, ///< Very verbose
+};
+
+
+/// \brief Signals used for progress message handling
+extern const int message_progress_sigs[];
+
+
+/// \brief Initializes the message functions
+///
+/// If an error occurs, this function doesn't return.
+///
+extern void message_init(void);
+
+
+/// Increase verbosity level by one step unless it was at maximum.
+extern void message_verbosity_increase(void);
+
+/// Decrease verbosity level by one step unless it was at minimum.
+extern void message_verbosity_decrease(void);
+
+/// Get the current verbosity level.
+extern enum message_verbosity message_verbosity_get(void);
+
+
+/// \brief Print a message if verbosity level is at least "verbosity"
+///
+/// This doesn't touch the exit status.
+lzma_attribute((__format__(__printf__, 2, 3)))
+extern void message(enum message_verbosity verbosity, const char *fmt, ...);
+
+
+/// \brief Prints a warning and possibly sets exit status
+///
+/// The message is printed only if verbosity level is at least V_WARNING.
+/// The exit status is set to WARNING unless it was already at ERROR.
+lzma_attribute((__format__(__printf__, 1, 2)))
+extern void message_warning(const char *fmt, ...);
+
+
+/// \brief Prints an error message and sets exit status
+///
+/// The message is printed only if verbosity level is at least V_ERROR.
+/// The exit status is set to ERROR.
+lzma_attribute((__format__(__printf__, 1, 2)))
+extern void message_error(const char *fmt, ...);
+
+
+/// \brief Prints an error message and exits with EXIT_ERROR
+///
+/// The message is printed only if verbosity level is at least V_ERROR.
+tuklib_attr_noreturn
+lzma_attribute((__format__(__printf__, 1, 2)))
+extern void message_fatal(const char *fmt, ...);
+
+
+/// Print an error message that an internal error occurred and exit with
+/// EXIT_ERROR.
+tuklib_attr_noreturn
+extern void message_bug(void);
+
+
+/// Print a message that establishing signal handlers failed, and exit with
+/// exit status ERROR.
+tuklib_attr_noreturn
+extern void message_signal_handler(void);
+
+
+/// Convert lzma_ret to a string.
+extern const char *message_strm(lzma_ret code);
+
+
+/// Display how much memory was needed and how much the limit was.
+extern void message_mem_needed(enum message_verbosity v, uint64_t memusage);
+
+
+/// Print the filter chain.
+extern void message_filters_show(
+ enum message_verbosity v, const lzma_filter *filters);
+
+
+/// Print a message that user should try --help.
+extern void message_try_help(void);
+
+
+/// Prints the version number to stdout and exits with exit status SUCCESS.
+tuklib_attr_noreturn
+extern void message_version(void);
+
+
+/// Print the help message.
+tuklib_attr_noreturn
+extern void message_help(bool long_help);
+
+
+/// \brief Set the total number of files to be processed
+///
+/// Standard input is counted as a file here. This is used when printing
+/// the filename via message_filename().
+extern void message_set_files(unsigned int files);
+
+
+/// \brief Set the name of the current file and possibly print it too
+///
+/// The name is printed immediately if --list was used or if --verbose
+/// was used and stderr is a terminal. Even when the filename isn't printed,
+/// it is stored so that it can be printed later if needed for progress
+/// messages.
+extern void message_filename(const char *src_name);
+
+
+/// \brief Start progress info handling
+///
+/// message_filename() must be called before this function to set
+/// the filename.
+///
+/// This must be paired with a call to message_progress_end() before the
+/// given *strm becomes invalid.
+///
+/// \param strm Pointer to lzma_stream used for the coding.
+/// \param in_size Size of the input file, or zero if unknown.
+///
+extern void message_progress_start(lzma_stream *strm,
+ bool is_passthru, uint64_t in_size);
+
+
+/// Update the progress info if in verbose mode and enough time has passed
+/// since the previous update. This can be called only when
+/// message_progress_start() has already been used.
+extern void message_progress_update(void);
+
+
+/// \brief Finishes the progress message if we were in verbose mode
+///
+/// \param finished True if the whole stream was successfully coded
+/// and output written to the output stream.
+///
+extern void message_progress_end(bool finished);
diff --git a/src/xz/mytime.c b/src/xz/mytime.c
new file mode 100644
index 0000000..7e8a074
--- /dev/null
+++ b/src/xz/mytime.c
@@ -0,0 +1,86 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file mytime.c
+/// \brief Time handling functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+#if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC)
+# include <time.h>
+#else
+# include <sys/time.h>
+#endif
+
+uint64_t opt_flush_timeout = 0;
+
+static uint64_t start_time;
+static uint64_t next_flush;
+
+
+/// \brief Get the current time as milliseconds
+///
+/// It's relative to some point but not necessarily to the UNIX Epoch.
+static uint64_t
+mytime_now(void)
+{
+#if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC)
+ // If CLOCK_MONOTONIC was available at compile time but for some
+ // reason isn't at runtime, fallback to CLOCK_REALTIME which
+ // according to POSIX is mandatory for all implementations.
+ static clockid_t clk_id = CLOCK_MONOTONIC;
+ struct timespec tv;
+ while (clock_gettime(clk_id, &tv))
+ clk_id = CLOCK_REALTIME;
+
+ return (uint64_t)tv.tv_sec * 1000 + (uint64_t)(tv.tv_nsec / 1000000);
+#else
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ return (uint64_t)tv.tv_sec * 1000 + (uint64_t)(tv.tv_usec / 1000);
+#endif
+}
+
+
+extern void
+mytime_set_start_time(void)
+{
+ start_time = mytime_now();
+ return;
+}
+
+
+extern uint64_t
+mytime_get_elapsed(void)
+{
+ return mytime_now() - start_time;
+}
+
+
+extern void
+mytime_set_flush_time(void)
+{
+ next_flush = mytime_now() + opt_flush_timeout;
+ return;
+}
+
+
+extern int
+mytime_get_flush_timeout(void)
+{
+ if (opt_flush_timeout == 0 || opt_mode != MODE_COMPRESS)
+ return -1;
+
+ const uint64_t now = mytime_now();
+ if (now >= next_flush)
+ return 0;
+
+ const uint64_t remaining = next_flush - now;
+ return remaining > INT_MAX ? INT_MAX : (int)remaining;
+}
diff --git a/src/xz/mytime.h b/src/xz/mytime.h
new file mode 100644
index 0000000..a7be2aa
--- /dev/null
+++ b/src/xz/mytime.h
@@ -0,0 +1,43 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file mytime.h
+/// \brief Time handling functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+/// \brief Number of milliseconds to between LZMA_SYNC_FLUSHes
+///
+/// If 0, timed flushing is disabled. Otherwise if no more input is available
+/// and not at the end of the file and at least opt_flush_timeout milliseconds
+/// has elapsed since the start of compression or the previous flushing
+/// (LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH), set LZMA_SYNC_FLUSH to flush
+/// the pending data.
+extern uint64_t opt_flush_timeout;
+
+
+/// \brief Store the time when (de)compression was started
+///
+/// The start time is also stored as the time of the first flush.
+extern void mytime_set_start_time(void);
+
+
+/// \brief Get the number of milliseconds since the operation started
+extern uint64_t mytime_get_elapsed(void);
+
+
+/// \brief Store the time of when compressor was flushed
+extern void mytime_set_flush_time(void);
+
+
+/// \brief Get the number of milliseconds until the next flush
+///
+/// This returns -1 if no timed flushing is used.
+///
+/// The return value is intended for use with poll().
+extern int mytime_get_flush_timeout(void);
diff --git a/src/xz/options.c b/src/xz/options.c
new file mode 100644
index 0000000..4d5e899
--- /dev/null
+++ b/src/xz/options.c
@@ -0,0 +1,359 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file options.c
+/// \brief Parser for filter-specific options
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+
+///////////////////
+// Generic stuff //
+///////////////////
+
+typedef struct {
+ const char *name;
+ uint64_t id;
+} name_id_map;
+
+
+typedef struct {
+ const char *name;
+ const name_id_map *map;
+ uint64_t min;
+ uint64_t max;
+} option_map;
+
+
+/// Parses option=value pairs that are separated with commas:
+/// opt=val,opt=val,opt=val
+///
+/// Each option is a string, that is converted to an integer using the
+/// index where the option string is in the array.
+///
+/// Value can be
+/// - a string-id map mapping a list of possible string values to integers
+/// (opts[i].map != NULL, opts[i].min and opts[i].max are ignored);
+/// - a number with minimum and maximum value limit
+/// (opts[i].map == NULL && opts[i].min != UINT64_MAX);
+/// - a string that will be parsed by the filter-specific code
+/// (opts[i].map == NULL && opts[i].min == UINT64_MAX, opts[i].max ignored)
+///
+/// When parsing both option and value succeed, a filter-specific function
+/// is called, which should update the given value to filter-specific
+/// options structure.
+///
+/// This returns only if no errors occur.
+///
+/// \param str String containing the options from the command line
+/// \param opts Filter-specific option map
+/// \param set Filter-specific function to update filter_options
+/// \param filter_options Pointer to filter-specific options structure
+///
+static void
+parse_options(const char *str, const option_map *opts,
+ void (*set)(void *filter_options,
+ unsigned key, uint64_t value, const char *valuestr),
+ void *filter_options)
+{
+ if (str == NULL || str[0] == '\0')
+ return;
+
+ char *s = xstrdup(str);
+ char *name = s;
+
+ while (*name != '\0') {
+ if (*name == ',') {
+ ++name;
+ continue;
+ }
+
+ char *split = strchr(name, ',');
+ if (split != NULL)
+ *split = '\0';
+
+ char *value = strchr(name, '=');
+ if (value != NULL)
+ *value++ = '\0';
+
+ if (value == NULL || value[0] == '\0')
+ message_fatal(_("%s: Options must be `name=value' "
+ "pairs separated with commas"), str);
+
+ // Look for the option name from the option map.
+ unsigned i = 0;
+ while (true) {
+ if (opts[i].name == NULL)
+ message_fatal(_("%s: Invalid option name"),
+ name);
+
+ if (strcmp(name, opts[i].name) == 0)
+ break;
+
+ ++i;
+ }
+
+ // Option was found from the map. See how we should handle it.
+ if (opts[i].map != NULL) {
+ // value is a string which we should map
+ // to an integer.
+ unsigned j;
+ for (j = 0; opts[i].map[j].name != NULL; ++j) {
+ if (strcmp(opts[i].map[j].name, value) == 0)
+ break;
+ }
+
+ if (opts[i].map[j].name == NULL)
+ message_fatal(_("%s: Invalid option value"),
+ value);
+
+ set(filter_options, i, opts[i].map[j].id, value);
+
+ } else if (opts[i].min == UINT64_MAX) {
+ // value is a special string that will be
+ // parsed by set().
+ set(filter_options, i, 0, value);
+
+ } else {
+ // value is an integer.
+ const uint64_t v = str_to_uint64(name, value,
+ opts[i].min, opts[i].max);
+ set(filter_options, i, v, value);
+ }
+
+ // Check if it was the last option.
+ if (split == NULL)
+ break;
+
+ name = split + 1;
+ }
+
+ free(s);
+ return;
+}
+
+
+///////////
+// Delta //
+///////////
+
+enum {
+ OPT_DIST,
+};
+
+
+static void
+set_delta(void *options, unsigned key, uint64_t value,
+ const char *valuestr lzma_attribute((__unused__)))
+{
+ lzma_options_delta *opt = options;
+ switch (key) {
+ case OPT_DIST:
+ opt->dist = value;
+ break;
+ }
+}
+
+
+extern lzma_options_delta *
+options_delta(const char *str)
+{
+ static const option_map opts[] = {
+ { "dist", NULL, LZMA_DELTA_DIST_MIN,
+ LZMA_DELTA_DIST_MAX },
+ { NULL, NULL, 0, 0 }
+ };
+
+ lzma_options_delta *options = xmalloc(sizeof(lzma_options_delta));
+ *options = (lzma_options_delta){
+ // It's hard to give a useful default for this.
+ .type = LZMA_DELTA_TYPE_BYTE,
+ .dist = LZMA_DELTA_DIST_MIN,
+ };
+
+ parse_options(str, opts, &set_delta, options);
+
+ return options;
+}
+
+
+/////////
+// BCJ //
+/////////
+
+enum {
+ OPT_START_OFFSET,
+};
+
+
+static void
+set_bcj(void *options, unsigned key, uint64_t value,
+ const char *valuestr lzma_attribute((__unused__)))
+{
+ lzma_options_bcj *opt = options;
+ switch (key) {
+ case OPT_START_OFFSET:
+ opt->start_offset = value;
+ break;
+ }
+}
+
+
+extern lzma_options_bcj *
+options_bcj(const char *str)
+{
+ static const option_map opts[] = {
+ { "start", NULL, 0, UINT32_MAX },
+ { NULL, NULL, 0, 0 }
+ };
+
+ lzma_options_bcj *options = xmalloc(sizeof(lzma_options_bcj));
+ *options = (lzma_options_bcj){
+ .start_offset = 0,
+ };
+
+ parse_options(str, opts, &set_bcj, options);
+
+ return options;
+}
+
+
+//////////
+// LZMA //
+//////////
+
+enum {
+ OPT_PRESET,
+ OPT_DICT,
+ OPT_LC,
+ OPT_LP,
+ OPT_PB,
+ OPT_MODE,
+ OPT_NICE,
+ OPT_MF,
+ OPT_DEPTH,
+};
+
+
+tuklib_attr_noreturn
+static void
+error_lzma_preset(const char *valuestr)
+{
+ message_fatal(_("Unsupported LZMA1/LZMA2 preset: %s"), valuestr);
+}
+
+
+static void
+set_lzma(void *options, unsigned key, uint64_t value, const char *valuestr)
+{
+ lzma_options_lzma *opt = options;
+
+ switch (key) {
+ case OPT_PRESET: {
+ if (valuestr[0] < '0' || valuestr[0] > '9')
+ error_lzma_preset(valuestr);
+
+ uint32_t preset = (uint32_t)(valuestr[0] - '0');
+
+ // Currently only "e" is supported as a modifier,
+ // so keep this simple for now.
+ if (valuestr[1] != '\0') {
+ if (valuestr[1] == 'e')
+ preset |= LZMA_PRESET_EXTREME;
+ else
+ error_lzma_preset(valuestr);
+
+ if (valuestr[2] != '\0')
+ error_lzma_preset(valuestr);
+ }
+
+ if (lzma_lzma_preset(options, preset))
+ error_lzma_preset(valuestr);
+
+ break;
+ }
+
+ case OPT_DICT:
+ opt->dict_size = value;
+ break;
+
+ case OPT_LC:
+ opt->lc = value;
+ break;
+
+ case OPT_LP:
+ opt->lp = value;
+ break;
+
+ case OPT_PB:
+ opt->pb = value;
+ break;
+
+ case OPT_MODE:
+ opt->mode = value;
+ break;
+
+ case OPT_NICE:
+ opt->nice_len = value;
+ break;
+
+ case OPT_MF:
+ opt->mf = value;
+ break;
+
+ case OPT_DEPTH:
+ opt->depth = value;
+ break;
+ }
+}
+
+
+extern lzma_options_lzma *
+options_lzma(const char *str)
+{
+ static const name_id_map modes[] = {
+ { "fast", LZMA_MODE_FAST },
+ { "normal", LZMA_MODE_NORMAL },
+ { NULL, 0 }
+ };
+
+ static const name_id_map mfs[] = {
+ { "hc3", LZMA_MF_HC3 },
+ { "hc4", LZMA_MF_HC4 },
+ { "bt2", LZMA_MF_BT2 },
+ { "bt3", LZMA_MF_BT3 },
+ { "bt4", LZMA_MF_BT4 },
+ { NULL, 0 }
+ };
+
+ static const option_map opts[] = {
+ { "preset", NULL, UINT64_MAX, 0 },
+ { "dict", NULL, LZMA_DICT_SIZE_MIN,
+ (UINT32_C(1) << 30) + (UINT32_C(1) << 29) },
+ { "lc", NULL, LZMA_LCLP_MIN, LZMA_LCLP_MAX },
+ { "lp", NULL, LZMA_LCLP_MIN, LZMA_LCLP_MAX },
+ { "pb", NULL, LZMA_PB_MIN, LZMA_PB_MAX },
+ { "mode", modes, 0, 0 },
+ { "nice", NULL, 2, 273 },
+ { "mf", mfs, 0, 0 },
+ { "depth", NULL, 0, UINT32_MAX },
+ { NULL, NULL, 0, 0 }
+ };
+
+ lzma_options_lzma *options = xmalloc(sizeof(lzma_options_lzma));
+ if (lzma_lzma_preset(options, LZMA_PRESET_DEFAULT))
+ message_bug();
+
+ parse_options(str, opts, &set_lzma, options);
+
+ if (options->lc + options->lp > LZMA_LCLP_MAX)
+ message_fatal(_("The sum of lc and lp must not exceed 4"));
+
+ return options;
+}
diff --git a/src/xz/options.h b/src/xz/options.h
new file mode 100644
index 0000000..61ec8d5
--- /dev/null
+++ b/src/xz/options.h
@@ -0,0 +1,31 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file options.h
+/// \brief Parser for filter-specific options
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// \brief Parser for Delta options
+///
+/// \return Pointer to allocated options structure.
+/// Doesn't return on error.
+extern lzma_options_delta *options_delta(const char *str);
+
+
+/// \brief Parser for BCJ options
+///
+/// \return Pointer to allocated options structure.
+/// Doesn't return on error.
+extern lzma_options_bcj *options_bcj(const char *str);
+
+
+/// \brief Parser for LZMA options
+///
+/// \return Pointer to allocated options structure.
+/// Doesn't return on error.
+extern lzma_options_lzma *options_lzma(const char *str);
diff --git a/src/xz/private.h b/src/xz/private.h
new file mode 100644
index 0000000..6414bdb
--- /dev/null
+++ b/src/xz/private.h
@@ -0,0 +1,66 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file private.h
+/// \brief Common includes, definitions, and prototypes
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include "mythread.h"
+
+#include "lzma.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <signal.h>
+#include <locale.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "tuklib_gettext.h"
+#include "tuklib_progname.h"
+#include "tuklib_exit.h"
+#include "tuklib_mbstr.h"
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+#endif
+
+#ifndef STDIN_FILENO
+# define STDIN_FILENO (fileno(stdin))
+#endif
+
+#ifndef STDOUT_FILENO
+# define STDOUT_FILENO (fileno(stdout))
+#endif
+
+#ifndef STDERR_FILENO
+# define STDERR_FILENO (fileno(stderr))
+#endif
+
+#if defined(HAVE_CAPSICUM) || defined(HAVE_PLEDGE)
+# define ENABLE_SANDBOX 1
+#endif
+
+#include "main.h"
+#include "mytime.h"
+#include "coder.h"
+#include "message.h"
+#include "args.h"
+#include "hardware.h"
+#include "file_io.h"
+#include "options.h"
+#include "signals.h"
+#include "suffix.h"
+#include "util.h"
+
+#ifdef HAVE_DECODERS
+# include "list.h"
+#endif
diff --git a/src/xz/signals.c b/src/xz/signals.c
new file mode 100644
index 0000000..7aef463
--- /dev/null
+++ b/src/xz/signals.c
@@ -0,0 +1,209 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file signals.c
+/// \brief Handling signals to abort operation
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+
+volatile sig_atomic_t user_abort = false;
+
+
+#if !(defined(_WIN32) && !defined(__CYGWIN__))
+
+/// If we were interrupted by a signal, we store the signal number so that
+/// we can raise that signal to kill the program when all cleanups have
+/// been done.
+static volatile sig_atomic_t exit_signal = 0;
+
+/// Mask of signals for which we have established a signal handler to set
+/// user_abort to true.
+static sigset_t hooked_signals;
+
+/// True once signals_init() has finished. This is used to skip blocking
+/// signals (with uninitialized hooked_signals) if signals_block() and
+/// signals_unblock() are called before signals_init() has been called.
+static bool signals_are_initialized = false;
+
+/// signals_block() and signals_unblock() can be called recursively.
+static size_t signals_block_count = 0;
+
+
+static void
+signal_handler(int sig)
+{
+ exit_signal = sig;
+ user_abort = true;
+
+#ifndef TUKLIB_DOSLIKE
+ io_write_to_user_abort_pipe();
+#endif
+
+ return;
+}
+
+
+extern void
+signals_init(void)
+{
+ // List of signals for which we establish the signal handler.
+ static const int sigs[] = {
+ SIGINT,
+ SIGTERM,
+#ifdef SIGHUP
+ SIGHUP,
+#endif
+#ifdef SIGPIPE
+ SIGPIPE,
+#endif
+#ifdef SIGXCPU
+ SIGXCPU,
+#endif
+#ifdef SIGXFSZ
+ SIGXFSZ,
+#endif
+ };
+
+ // Mask of the signals for which we have established a signal handler.
+ sigemptyset(&hooked_signals);
+ for (size_t i = 0; i < ARRAY_SIZE(sigs); ++i)
+ sigaddset(&hooked_signals, sigs[i]);
+
+#ifdef SIGALRM
+ // Add also the signals from message.c to hooked_signals.
+ for (size_t i = 0; message_progress_sigs[i] != 0; ++i)
+ sigaddset(&hooked_signals, message_progress_sigs[i]);
+#endif
+
+ // Using "my_sa" because "sa" may conflict with a sockaddr variable
+ // from system headers on Solaris.
+ struct sigaction my_sa;
+
+ // All the signals that we handle we also blocked while the signal
+ // handler runs.
+ my_sa.sa_mask = hooked_signals;
+
+ // Don't set SA_RESTART, because we want EINTR so that we can check
+ // for user_abort and cleanup before exiting. We block the signals
+ // for which we have established a handler when we don't want EINTR.
+ my_sa.sa_flags = 0;
+ my_sa.sa_handler = &signal_handler;
+
+ for (size_t i = 0; i < ARRAY_SIZE(sigs); ++i) {
+ // If the parent process has left some signals ignored,
+ // we don't unignore them.
+ struct sigaction old;
+ if (sigaction(sigs[i], NULL, &old) == 0
+ && old.sa_handler == SIG_IGN)
+ continue;
+
+ // Establish the signal handler.
+ if (sigaction(sigs[i], &my_sa, NULL))
+ message_signal_handler();
+ }
+
+ signals_are_initialized = true;
+
+ return;
+}
+
+
+#ifndef __VMS
+extern void
+signals_block(void)
+{
+ if (signals_are_initialized) {
+ if (signals_block_count++ == 0) {
+ const int saved_errno = errno;
+ mythread_sigmask(SIG_BLOCK, &hooked_signals, NULL);
+ errno = saved_errno;
+ }
+ }
+
+ return;
+}
+
+
+extern void
+signals_unblock(void)
+{
+ if (signals_are_initialized) {
+ assert(signals_block_count > 0);
+
+ if (--signals_block_count == 0) {
+ const int saved_errno = errno;
+ mythread_sigmask(SIG_UNBLOCK, &hooked_signals, NULL);
+ errno = saved_errno;
+ }
+ }
+
+ return;
+}
+#endif
+
+
+extern void
+signals_exit(void)
+{
+ const int sig = (int)exit_signal;
+
+ if (sig != 0) {
+#if defined(TUKLIB_DOSLIKE) || defined(__VMS)
+ // Don't raise(), set only exit status. This avoids
+ // printing unwanted message about SIGINT when the user
+ // presses C-c.
+ set_exit_status(E_ERROR);
+#else
+ struct sigaction sa;
+ sa.sa_handler = SIG_DFL;
+ sigfillset(&sa.sa_mask);
+ sa.sa_flags = 0;
+ sigaction(sig, &sa, NULL);
+ raise(sig);
+#endif
+ }
+
+ return;
+}
+
+#else
+
+// While Windows has some very basic signal handling functions as required
+// by C89, they are not really used, and e.g. SIGINT doesn't work exactly
+// the way it does on POSIX (Windows creates a new thread for the signal
+// handler). Instead, we use SetConsoleCtrlHandler() to catch user
+// pressing C-c, because that seems to be the recommended way to do it.
+//
+// NOTE: This doesn't work under MSYS. Trying with SIGINT doesn't work
+// either even if it appeared to work at first. So test using Windows
+// console window.
+
+static BOOL WINAPI
+signal_handler(DWORD type lzma_attribute((__unused__)))
+{
+ // Since we don't get a signal number which we could raise() at
+ // signals_exit() like on POSIX, just set the exit status to
+ // indicate an error, so that we cannot return with zero exit status.
+ set_exit_status(E_ERROR);
+ user_abort = true;
+ return TRUE;
+}
+
+
+extern void
+signals_init(void)
+{
+ if (!SetConsoleCtrlHandler(&signal_handler, TRUE))
+ message_signal_handler();
+
+ return;
+}
+
+#endif
diff --git a/src/xz/signals.h b/src/xz/signals.h
new file mode 100644
index 0000000..5b125e0
--- /dev/null
+++ b/src/xz/signals.h
@@ -0,0 +1,43 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file signals.h
+/// \brief Handling signals to abort operation
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// If this is true, we will clean up the possibly incomplete output file,
+/// return to main() as soon as practical. That is, the code needs to poll
+/// this variable in various places.
+extern volatile sig_atomic_t user_abort;
+
+
+/// Initialize the signal handler, which will set user_abort to true when
+/// user e.g. presses C-c.
+extern void signals_init(void);
+
+
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__VMS)
+# define signals_block() do { } while (0)
+# define signals_unblock() do { } while (0)
+#else
+/// Block the signals which don't have SA_RESTART and which would just set
+/// user_abort to true. This is handy when we don't want to handle EINTR
+/// and don't want SA_RESTART either.
+extern void signals_block(void);
+
+/// Unblock the signals blocked by signals_block().
+extern void signals_unblock(void);
+#endif
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+# define signals_exit() do { } while (0)
+#else
+/// If user has sent us a signal earlier to terminate the process,
+/// re-raise that signal to actually terminate the process.
+extern void signals_exit(void);
+#endif
diff --git a/src/xz/suffix.c b/src/xz/suffix.c
new file mode 100644
index 0000000..6ce9787
--- /dev/null
+++ b/src/xz/suffix.c
@@ -0,0 +1,401 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file suffix.c
+/// \brief Checks filename suffix and creates the destination filename
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+
+#ifdef __DJGPP__
+# include <fcntl.h>
+#endif
+
+// For case-insensitive filename suffix on case-insensitive systems
+#if defined(TUKLIB_DOSLIKE) || defined(__VMS)
+# ifdef HAVE_STRINGS_H
+# include <strings.h>
+# endif
+# define strcmp strcasecmp
+#endif
+
+
+static char *custom_suffix = NULL;
+
+
+/// \brief Test if the char is a directory separator
+static bool
+is_dir_sep(char c)
+{
+#ifdef TUKLIB_DOSLIKE
+ return c == '/' || c == '\\' || c == ':';
+#else
+ return c == '/';
+#endif
+}
+
+
+/// \brief Test if the string contains a directory separator
+static bool
+has_dir_sep(const char *str)
+{
+#ifdef TUKLIB_DOSLIKE
+ return strpbrk(str, "/\\:") != NULL;
+#else
+ return strchr(str, '/') != NULL;
+#endif
+}
+
+
+#ifdef __DJGPP__
+/// \brief Test for special suffix used for 8.3 short filenames (SFN)
+///
+/// \return If str matches *.?- or *.??-, true is returned. Otherwise
+/// false is returned.
+static bool
+has_sfn_suffix(const char *str, size_t len)
+{
+ if (len >= 4 && str[len - 1] == '-' && str[len - 2] != '.'
+ && !is_dir_sep(str[len - 2])) {
+ // *.?-
+ if (str[len - 3] == '.')
+ return !is_dir_sep(str[len - 4]);
+
+ // *.??-
+ if (len >= 5 && !is_dir_sep(str[len - 3])
+ && str[len - 4] == '.')
+ return !is_dir_sep(str[len - 5]);
+ }
+
+ return false;
+}
+#endif
+
+
+/// \brief Checks if src_name has given compressed_suffix
+///
+/// \param suffix Filename suffix to look for
+/// \param src_name Input filename
+/// \param src_len strlen(src_name)
+///
+/// \return If src_name has the suffix, src_len - strlen(suffix) is
+/// returned. It's always a positive integer. Otherwise zero
+/// is returned.
+static size_t
+test_suffix(const char *suffix, const char *src_name, size_t src_len)
+{
+ const size_t suffix_len = strlen(suffix);
+
+ // The filename must have at least one character in addition to
+ // the suffix. src_name may contain path to the filename, so we
+ // need to check for directory separator too.
+ if (src_len <= suffix_len
+ || is_dir_sep(src_name[src_len - suffix_len - 1]))
+ return 0;
+
+ if (strcmp(suffix, src_name + src_len - suffix_len) == 0)
+ return src_len - suffix_len;
+
+ return 0;
+}
+
+
+/// \brief Removes the filename suffix of the compressed file
+///
+/// \return Name of the uncompressed file, or NULL if file has unknown
+/// suffix.
+static char *
+uncompressed_name(const char *src_name, const size_t src_len)
+{
+ static const struct {
+ const char *compressed;
+ const char *uncompressed;
+ } suffixes[] = {
+ { ".xz", "" },
+ { ".txz", ".tar" }, // .txz abbreviation for .txt.gz is rare.
+ { ".lzma", "" },
+#ifdef __DJGPP__
+ { ".lzm", "" },
+#endif
+ { ".tlz", ".tar" }, // Both .tar.lzma and .tar.lz
+#ifdef HAVE_LZIP_DECODER
+ { ".lz", "" },
+#endif
+ };
+
+ const char *new_suffix = "";
+ size_t new_len = 0;
+
+ if (opt_format != FORMAT_RAW) {
+ for (size_t i = 0; i < ARRAY_SIZE(suffixes); ++i) {
+ new_len = test_suffix(suffixes[i].compressed,
+ src_name, src_len);
+ if (new_len != 0) {
+ new_suffix = suffixes[i].uncompressed;
+ break;
+ }
+ }
+
+#ifdef __DJGPP__
+ // Support also *.?- -> *.? and *.??- -> *.?? on DOS.
+ // This is done also when long filenames are available
+ // to keep it easy to decompress files created when
+ // long filename support wasn't available.
+ if (new_len == 0 && has_sfn_suffix(src_name, src_len)) {
+ new_suffix = "";
+ new_len = src_len - 1;
+ }
+#endif
+ }
+
+ if (new_len == 0 && custom_suffix != NULL)
+ new_len = test_suffix(custom_suffix, src_name, src_len);
+
+ if (new_len == 0) {
+ message_warning(_("%s: Filename has an unknown suffix, "
+ "skipping"), src_name);
+ return NULL;
+ }
+
+ const size_t new_suffix_len = strlen(new_suffix);
+ char *dest_name = xmalloc(new_len + new_suffix_len + 1);
+
+ memcpy(dest_name, src_name, new_len);
+ memcpy(dest_name + new_len, new_suffix, new_suffix_len);
+ dest_name[new_len + new_suffix_len] = '\0';
+
+ return dest_name;
+}
+
+
+/// This message is needed in multiple places in compressed_name(),
+/// so the message has been put into its own function.
+static void
+msg_suffix(const char *src_name, const char *suffix)
+{
+ message_warning(_("%s: File already has `%s' suffix, skipping"),
+ src_name, suffix);
+ return;
+}
+
+
+/// \brief Appends suffix to src_name
+///
+/// In contrast to uncompressed_name(), we check only suffixes that are valid
+/// for the specified file format.
+static char *
+compressed_name(const char *src_name, size_t src_len)
+{
+ // The order of these must match the order in args.h.
+ static const char *const all_suffixes[][4] = {
+ {
+ ".xz",
+ ".txz",
+ NULL
+ }, {
+ ".lzma",
+#ifdef __DJGPP__
+ ".lzm",
+#endif
+ ".tlz",
+ NULL
+#ifdef HAVE_LZIP_DECODER
+ // This is needed to keep the table indexing in sync with
+ // enum format_type from coder.h.
+ }, {
+/*
+ ".lz",
+*/
+ NULL
+#endif
+ }, {
+ // --format=raw requires specifying the suffix
+ // manually or using stdout.
+ NULL
+ }
+ };
+
+ // args.c ensures these.
+ assert(opt_format != FORMAT_AUTO);
+#ifdef HAVE_LZIP_DECODER
+ assert(opt_format != FORMAT_LZIP);
+#endif
+
+ const size_t format = opt_format - 1;
+ const char *const *suffixes = all_suffixes[format];
+
+ // Look for known filename suffixes and refuse to compress them.
+ for (size_t i = 0; suffixes[i] != NULL; ++i) {
+ if (test_suffix(suffixes[i], src_name, src_len) != 0) {
+ msg_suffix(src_name, suffixes[i]);
+ return NULL;
+ }
+ }
+
+#ifdef __DJGPP__
+ // Recognize also the special suffix that is used when long
+ // filename (LFN) support isn't available. This suffix is
+ // recognized on LFN systems too.
+ if (opt_format == FORMAT_XZ && has_sfn_suffix(src_name, src_len)) {
+ msg_suffix(src_name, "-");
+ return NULL;
+ }
+#endif
+
+ if (custom_suffix != NULL) {
+ if (test_suffix(custom_suffix, src_name, src_len) != 0) {
+ msg_suffix(src_name, custom_suffix);
+ return NULL;
+ }
+ }
+
+ const char *suffix = custom_suffix != NULL
+ ? custom_suffix : suffixes[0];
+ size_t suffix_len = strlen(suffix);
+
+#ifdef __DJGPP__
+ if (!_use_lfn(src_name)) {
+ // Long filename (LFN) support isn't available and we are
+ // limited to 8.3 short filenames (SFN).
+ //
+ // Look for suffix separator from the filename, and make sure
+ // that it is in the filename, not in a directory name.
+ const char *sufsep = strrchr(src_name, '.');
+ if (sufsep == NULL || sufsep[1] == '\0'
+ || has_dir_sep(sufsep)) {
+ // src_name has no filename extension.
+ //
+ // Examples:
+ // xz foo -> foo.xz
+ // xz -F lzma foo -> foo.lzm
+ // xz -S x foo -> foox
+ // xz -S x foo. -> foo.x
+ // xz -S x.y foo -> foox.y
+ // xz -S .x foo -> foo.x
+ // xz -S .x foo. -> foo.x
+ //
+ // Avoid double dots:
+ if (sufsep != NULL && sufsep[1] == '\0'
+ && suffix[0] == '.')
+ --src_len;
+
+ } else if (custom_suffix == NULL
+ && strcasecmp(sufsep, ".tar") == 0) {
+ // ".tar" is handled specially.
+ //
+ // Examples:
+ // xz foo.tar -> foo.txz
+ // xz -F lzma foo.tar -> foo.tlz
+ static const char *const tar_suffixes[] = {
+ ".txz", // .tar.xz
+ ".tlz", // .tar.lzma
+/*
+ ".tlz", // .tar.lz
+*/
+ };
+ suffix = tar_suffixes[format];
+ suffix_len = 4;
+ src_len -= 4;
+
+ } else {
+ if (custom_suffix == NULL && opt_format == FORMAT_XZ) {
+ // Instead of the .xz suffix, use a single
+ // character at the end of the filename
+ // extension. This is to minimize name
+ // conflicts when compressing multiple files
+ // with the same basename. E.g. foo.txt and
+ // foo.exe become foo.tx- and foo.ex-. Dash
+ // is rare as the last character of the
+ // filename extension, so it seems to be
+ // quite safe choice and it stands out better
+ // in directory listings than e.g. x. For
+ // comparison, gzip uses z.
+ suffix = "-";
+ suffix_len = 1;
+ }
+
+ if (suffix[0] == '.') {
+ // The first character of the suffix is a dot.
+ // Throw away the original filename extension
+ // and replace it with the new suffix.
+ //
+ // Examples:
+ // xz -F lzma foo.txt -> foo.lzm
+ // xz -S .x foo.txt -> foo.x
+ src_len = sufsep - src_name;
+
+ } else {
+ // The first character of the suffix is not
+ // a dot. Preserve the first 0-2 characters
+ // of the original filename extension.
+ //
+ // Examples:
+ // xz foo.txt -> foo.tx-
+ // xz -S x foo.c -> foo.cx
+ // xz -S ab foo.c -> foo.cab
+ // xz -S ab foo.txt -> foo.tab
+ // xz -S abc foo.txt -> foo.abc
+ //
+ // Truncate the suffix to three chars:
+ if (suffix_len > 3)
+ suffix_len = 3;
+
+ // If needed, overwrite 1-3 characters.
+ if (strlen(sufsep) > 4 - suffix_len)
+ src_len = sufsep - src_name
+ + 4 - suffix_len;
+ }
+ }
+ }
+#endif
+
+ char *dest_name = xmalloc(src_len + suffix_len + 1);
+
+ memcpy(dest_name, src_name, src_len);
+ memcpy(dest_name + src_len, suffix, suffix_len);
+ dest_name[src_len + suffix_len] = '\0';
+
+ return dest_name;
+}
+
+
+extern char *
+suffix_get_dest_name(const char *src_name)
+{
+ assert(src_name != NULL);
+
+ // Length of the name is needed in all cases to locate the end of
+ // the string to compare the suffix, so calculate the length here.
+ const size_t src_len = strlen(src_name);
+
+ return opt_mode == MODE_COMPRESS
+ ? compressed_name(src_name, src_len)
+ : uncompressed_name(src_name, src_len);
+}
+
+
+extern void
+suffix_set(const char *suffix)
+{
+ // Empty suffix and suffixes having a directory separator are
+ // rejected. Such suffixes would break things later.
+ if (suffix[0] == '\0' || has_dir_sep(suffix))
+ message_fatal(_("%s: Invalid filename suffix"), suffix);
+
+ // Replace the old custom_suffix (if any) with the new suffix.
+ free(custom_suffix);
+ custom_suffix = xstrdup(suffix);
+ return;
+}
+
+
+extern bool
+suffix_is_set(void)
+{
+ return custom_suffix != NULL;
+}
diff --git a/src/xz/suffix.h b/src/xz/suffix.h
new file mode 100644
index 0000000..135e905
--- /dev/null
+++ b/src/xz/suffix.h
@@ -0,0 +1,36 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file suffix.h
+/// \brief Checks filename suffix and creates the destination filename
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// \brief Get the name of the destination file
+///
+/// Depending on the global variable opt_mode, this tries to find a matching
+/// counterpart for src_name. If the name can be constructed, it is allocated
+/// and returned (caller must free it). On error, a message is printed and
+/// NULL is returned.
+extern char *suffix_get_dest_name(const char *src_name);
+
+
+/// \brief Set a custom filename suffix
+///
+/// This function calls xstrdup() for the given suffix, thus the caller
+/// doesn't need to keep the memory allocated. There can be only one custom
+/// suffix, thus if this is called multiple times, the old suffixes are freed
+/// and forgotten.
+extern void suffix_set(const char *suffix);
+
+
+/// \brief Check if a custom suffix has been set
+///
+/// Returns true if the internal tracking of the suffix string has been set
+/// and false if the string has not been set. This will keep the suffix
+/// string encapsulated instead of extern-ing the variable.
+extern bool suffix_is_set(void);
diff --git a/src/xz/util.c b/src/xz/util.c
new file mode 100644
index 0000000..6ab4c2d
--- /dev/null
+++ b/src/xz/util.c
@@ -0,0 +1,287 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file util.c
+/// \brief Miscellaneous utility functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "private.h"
+#include <stdarg.h>
+
+
+/// Buffers for uint64_to_str() and uint64_to_nicestr()
+static char bufs[4][128];
+
+
+// Thousand separator support in uint64_to_str() and uint64_to_nicestr():
+//
+// DJGPP 2.05 added support for thousands separators but it's broken
+// at least under WinXP with Finnish locale that uses a non-breaking space
+// as the thousands separator. Workaround by disabling thousands separators
+// for DJGPP builds.
+//
+// MSVC doesn't support thousand separators.
+#if defined(__DJGPP__) || defined(_MSC_VER)
+# define FORMAT_THOUSAND_SEP(prefix, suffix) prefix suffix
+# define check_thousand_sep(slot) do { } while (0)
+#else
+# define FORMAT_THOUSAND_SEP(prefix, suffix) ((thousand == WORKS) \
+ ? prefix "'" suffix \
+ : prefix suffix)
+
+static enum { UNKNOWN, WORKS, BROKEN } thousand = UNKNOWN;
+
+/// Check if thousands separator is supported. Run-time checking is easiest
+/// because it seems to be sometimes lacking even on a POSIXish system.
+/// Note that trying to use thousands separators when snprintf() doesn't
+/// support them results in undefined behavior. This just has happened to
+/// work well enough in practice.
+///
+/// This must be called before using the FORMAT_THOUSAND_SEP macro.
+static void
+check_thousand_sep(uint32_t slot)
+{
+ if (thousand == UNKNOWN) {
+ bufs[slot][0] = '\0';
+ snprintf(bufs[slot], sizeof(bufs[slot]), "%'u", 1U);
+ thousand = bufs[slot][0] == '1' ? WORKS : BROKEN;
+ }
+
+ return;
+}
+#endif
+
+
+extern void *
+xrealloc(void *ptr, size_t size)
+{
+ assert(size > 0);
+
+ // Save ptr so that we can free it if realloc fails.
+ // The point is that message_fatal ends up calling stdio functions
+ // which in some libc implementations might allocate memory from
+ // the heap. Freeing ptr improves the chances that there's free
+ // memory for stdio functions if they need it.
+ void *p = ptr;
+ ptr = realloc(ptr, size);
+
+ if (ptr == NULL) {
+ const int saved_errno = errno;
+ free(p);
+ message_fatal("%s", strerror(saved_errno));
+ }
+
+ return ptr;
+}
+
+
+extern char *
+xstrdup(const char *src)
+{
+ assert(src != NULL);
+ const size_t size = strlen(src) + 1;
+ char *dest = xmalloc(size);
+ return memcpy(dest, src, size);
+}
+
+
+extern uint64_t
+str_to_uint64(const char *name, const char *value, uint64_t min, uint64_t max)
+{
+ uint64_t result = 0;
+
+ // Skip blanks.
+ while (*value == ' ' || *value == '\t')
+ ++value;
+
+ // Accept special value "max". Supporting "min" doesn't seem useful.
+ if (strcmp(value, "max") == 0)
+ return max;
+
+ if (*value < '0' || *value > '9')
+ message_fatal(_("%s: Value is not a non-negative "
+ "decimal integer"), value);
+
+ do {
+ // Don't overflow.
+ if (result > UINT64_MAX / 10)
+ goto error;
+
+ result *= 10;
+
+ // Another overflow check
+ const uint32_t add = (uint32_t)(*value - '0');
+ if (UINT64_MAX - add < result)
+ goto error;
+
+ result += add;
+ ++value;
+ } while (*value >= '0' && *value <= '9');
+
+ if (*value != '\0') {
+ // Look for suffix. Originally this supported both base-2
+ // and base-10, but since there seems to be little need
+ // for base-10 in this program, treat everything as base-2
+ // and also be more relaxed about the case of the first
+ // letter of the suffix.
+ uint64_t multiplier = 0;
+ if (*value == 'k' || *value == 'K')
+ multiplier = UINT64_C(1) << 10;
+ else if (*value == 'm' || *value == 'M')
+ multiplier = UINT64_C(1) << 20;
+ else if (*value == 'g' || *value == 'G')
+ multiplier = UINT64_C(1) << 30;
+
+ ++value;
+
+ // Allow also e.g. Ki, KiB, and KB.
+ if (*value != '\0' && strcmp(value, "i") != 0
+ && strcmp(value, "iB") != 0
+ && strcmp(value, "B") != 0)
+ multiplier = 0;
+
+ if (multiplier == 0) {
+ message(V_ERROR, _("%s: Invalid multiplier suffix"),
+ value - 1);
+ message_fatal(_("Valid suffixes are `KiB' (2^10), "
+ "`MiB' (2^20), and `GiB' (2^30)."));
+ }
+
+ // Don't overflow here either.
+ if (result > UINT64_MAX / multiplier)
+ goto error;
+
+ result *= multiplier;
+ }
+
+ if (result < min || result > max)
+ goto error;
+
+ return result;
+
+error:
+ message_fatal(_("Value of the option `%s' must be in the range "
+ "[%" PRIu64 ", %" PRIu64 "]"),
+ name, min, max);
+}
+
+
+extern uint64_t
+round_up_to_mib(uint64_t n)
+{
+ return (n >> 20) + ((n & ((UINT32_C(1) << 20) - 1)) != 0);
+}
+
+
+extern const char *
+uint64_to_str(uint64_t value, uint32_t slot)
+{
+ assert(slot < ARRAY_SIZE(bufs));
+
+ check_thousand_sep(slot);
+
+ snprintf(bufs[slot], sizeof(bufs[slot]),
+ FORMAT_THOUSAND_SEP("%", PRIu64), value);
+
+ return bufs[slot];
+}
+
+
+extern const char *
+uint64_to_nicestr(uint64_t value, enum nicestr_unit unit_min,
+ enum nicestr_unit unit_max, bool always_also_bytes,
+ uint32_t slot)
+{
+ assert(unit_min <= unit_max);
+ assert(unit_max <= NICESTR_TIB);
+ assert(slot < ARRAY_SIZE(bufs));
+
+ check_thousand_sep(slot);
+
+ enum nicestr_unit unit = NICESTR_B;
+ char *pos = bufs[slot];
+ size_t left = sizeof(bufs[slot]);
+
+ if ((unit_min == NICESTR_B && value < 10000)
+ || unit_max == NICESTR_B) {
+ // The value is shown as bytes.
+ my_snprintf(&pos, &left, FORMAT_THOUSAND_SEP("%", "u"),
+ (unsigned int)value);
+ } else {
+ // Scale the value to a nicer unit. Unless unit_min and
+ // unit_max limit us, we will show at most five significant
+ // digits with one decimal place.
+ double d = (double)(value);
+ do {
+ d /= 1024.0;
+ ++unit;
+ } while (unit < unit_min || (d > 9999.9 && unit < unit_max));
+
+ my_snprintf(&pos, &left, FORMAT_THOUSAND_SEP("%", ".1f"), d);
+ }
+
+ static const char suffix[5][4] = { "B", "KiB", "MiB", "GiB", "TiB" };
+ my_snprintf(&pos, &left, " %s", suffix[unit]);
+
+ if (always_also_bytes && value >= 10000)
+ snprintf(pos, left, FORMAT_THOUSAND_SEP(" (%", PRIu64 " B)"),
+ value);
+
+ return bufs[slot];
+}
+
+
+extern void
+my_snprintf(char **pos, size_t *left, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ const int len = vsnprintf(*pos, *left, fmt, ap);
+ va_end(ap);
+
+ // If an error occurred, we want the caller to think that the whole
+ // buffer was used. This way no more data will be written to the
+ // buffer. We don't need better error handling here, although it
+ // is possible that the result looks garbage on the terminal if
+ // e.g. an UTF-8 character gets split. That shouldn't (easily)
+ // happen though, because the buffers used have some extra room.
+ if (len < 0 || (size_t)(len) >= *left) {
+ *left = 0;
+ } else {
+ *pos += len;
+ *left -= (size_t)(len);
+ }
+
+ return;
+}
+
+
+extern bool
+is_tty_stdin(void)
+{
+ const bool ret = isatty(STDIN_FILENO);
+
+ if (ret)
+ message_error(_("Compressed data cannot be read from "
+ "a terminal"));
+
+ return ret;
+}
+
+
+extern bool
+is_tty_stdout(void)
+{
+ const bool ret = isatty(STDOUT_FILENO);
+
+ if (ret)
+ message_error(_("Compressed data cannot be written to "
+ "a terminal"));
+
+ return ret;
+}
diff --git a/src/xz/util.h b/src/xz/util.h
new file mode 100644
index 0000000..6d7e148
--- /dev/null
+++ b/src/xz/util.h
@@ -0,0 +1,119 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file util.h
+/// \brief Miscellaneous utility functions
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+/// \brief Safe malloc() that never returns NULL
+///
+/// \note xmalloc(), xrealloc(), and xstrdup() must not be used when
+/// there are files open for writing, that should be cleaned up
+/// before exiting.
+#define xmalloc(size) xrealloc(NULL, size)
+
+
+/// \brief Safe realloc() that never returns NULL
+lzma_attr_alloc_size(2)
+extern void *xrealloc(void *ptr, size_t size);
+
+
+/// \brief Safe strdup() that never returns NULL
+extern char *xstrdup(const char *src);
+
+
+/// \brief Fancy version of strtoull()
+///
+/// \param name Name of the option to show in case of an error
+/// \param value String containing the number to be parsed; may
+/// contain suffixes "k", "M", "G", "Ki", "Mi", or "Gi"
+/// \param min Minimum valid value
+/// \param max Maximum valid value
+///
+/// \return Parsed value that is in the range [min, max]. Does not return
+/// if an error occurs.
+///
+extern uint64_t str_to_uint64(const char *name, const char *value,
+ uint64_t min, uint64_t max);
+
+
+/// \brief Round an integer up to the next full MiB and convert to MiB
+///
+/// This is used when printing memory usage and limit.
+extern uint64_t round_up_to_mib(uint64_t n);
+
+
+/// \brief Convert uint64_t to a string
+///
+/// Convert the given value to a string with locale-specific thousand
+/// separators, if supported by the snprintf() implementation. The string
+/// is stored into an internal static buffer indicated by the slot argument.
+/// A pointer to the selected buffer is returned.
+///
+/// This function exists, because non-POSIX systems don't support thousand
+/// separator in format strings. Solving the problem in a simple way doesn't
+/// work, because it breaks gettext (specifically, the xgettext tool).
+extern const char *uint64_to_str(uint64_t value, uint32_t slot);
+
+
+enum nicestr_unit {
+ NICESTR_B,
+ NICESTR_KIB,
+ NICESTR_MIB,
+ NICESTR_GIB,
+ NICESTR_TIB,
+};
+
+
+/// \brief Convert uint64_t to a nice human readable string
+///
+/// This is like uint64_to_str() but uses B, KiB, MiB, GiB, or TiB suffix
+/// and optionally includes the exact size in parenthesis.
+///
+/// \param value Value to be printed
+/// \param unit_min Smallest unit to use. This and unit_max are used
+/// e.g. when showing the progress indicator to force
+/// the unit to MiB.
+/// \param unit_max Biggest unit to use. assert(unit_min <= unit_max).
+/// \param always_also_bytes
+/// Show also the exact byte value in parenthesis
+/// if the nicely formatted string uses bigger unit
+/// than bytes.
+/// \param slot Which static buffer to use to hold the string.
+/// This is shared with uint64_to_str().
+///
+/// \return Pointer to statically allocated buffer containing the string.
+///
+/// \note This uses double_to_str() internally so the static buffer
+/// in double_to_str() will be overwritten.
+///
+extern const char *uint64_to_nicestr(uint64_t value,
+ enum nicestr_unit unit_min, enum nicestr_unit unit_max,
+ bool always_also_bytes, uint32_t slot);
+
+
+/// \brief Wrapper for snprintf() to help constructing a string in pieces
+///
+/// A maximum of *left bytes is written starting from *pos. *pos and *left
+/// are updated accordingly.
+lzma_attribute((__format__(__printf__, 3, 4)))
+extern void my_snprintf(char **pos, size_t *left, const char *fmt, ...);
+
+
+/// \brief Test if stdin is a terminal
+///
+/// If stdin is a terminal, an error message is printed and exit status set
+/// to EXIT_ERROR.
+extern bool is_tty_stdin(void);
+
+
+/// \brief Test if stdout is a terminal
+///
+/// If stdout is a terminal, an error message is printed and exit status set
+/// to EXIT_ERROR.
+extern bool is_tty_stdout(void);
diff --git a/src/xz/xz.1 b/src/xz/xz.1
new file mode 100644
index 0000000..73ca6ef
--- /dev/null
+++ b/src/xz/xz.1
@@ -0,0 +1,3020 @@
+'\" t
+.\"
+.\" Authors: Lasse Collin
+.\" Jia Tan
+.\"
+.\" This file has been put into the public domain.
+.\" You can do whatever you want with this file.
+.\"
+.TH XZ 1 "2023-07-17" "Tukaani" "XZ Utils"
+.
+.SH NAME
+xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files
+.
+.SH SYNOPSIS
+.B xz
+.RI [ option... ]
+.RI [ file... ]
+.
+.SH COMMAND ALIASES
+.B unxz
+is equivalent to
+.BR "xz \-\-decompress" .
+.br
+.B xzcat
+is equivalent to
+.BR "xz \-\-decompress \-\-stdout" .
+.br
+.B lzma
+is equivalent to
+.BR "xz \-\-format=lzma" .
+.br
+.B unlzma
+is equivalent to
+.BR "xz \-\-format=lzma \-\-decompress" .
+.br
+.B lzcat
+is equivalent to
+.BR "xz \-\-format=lzma \-\-decompress \-\-stdout" .
+.PP
+When writing scripts that need to decompress files,
+it is recommended to always use the name
+.B xz
+with appropriate arguments
+.RB ( "xz \-d"
+or
+.BR "xz \-dc" )
+instead of the names
+.B unxz
+and
+.BR xzcat .
+.
+.SH DESCRIPTION
+.B xz
+is a general-purpose data compression tool with
+command line syntax similar to
+.BR gzip (1)
+and
+.BR bzip2 (1).
+The native file format is the
+.B .xz
+format, but the legacy
+.B .lzma
+format used by LZMA Utils and
+raw compressed streams with no container format headers
+are also supported.
+In addition, decompression of the
+.B .lz
+format used by
+.B lzip
+is supported.
+.PP
+.B xz
+compresses or decompresses each
+.I file
+according to the selected operation mode.
+If no
+.I files
+are given or
+.I file
+is
+.BR \- ,
+.B xz
+reads from standard input and writes the processed data
+to standard output.
+.B xz
+will refuse (display an error and skip the
+.IR file )
+to write compressed data to standard output if it is a terminal.
+Similarly,
+.B xz
+will refuse to read compressed data
+from standard input if it is a terminal.
+.PP
+Unless
+.B \-\-stdout
+is specified,
+.I files
+other than
+.B \-
+are written to a new file whose name is derived from the source
+.I file
+name:
+.IP \(bu 3
+When compressing, the suffix of the target file format
+.RB ( .xz
+or
+.BR .lzma )
+is appended to the source filename to get the target filename.
+.IP \(bu 3
+When decompressing, the
+.BR .xz ,
+.BR .lzma ,
+or
+.B .lz
+suffix is removed from the filename to get the target filename.
+.B xz
+also recognizes the suffixes
+.B .txz
+and
+.BR .tlz ,
+and replaces them with the
+.B .tar
+suffix.
+.PP
+If the target file already exists, an error is displayed and the
+.I file
+is skipped.
+.PP
+Unless writing to standard output,
+.B xz
+will display a warning and skip the
+.I file
+if any of the following applies:
+.IP \(bu 3
+.I File
+is not a regular file.
+Symbolic links are not followed,
+and thus they are not considered to be regular files.
+.IP \(bu 3
+.I File
+has more than one hard link.
+.IP \(bu 3
+.I File
+has setuid, setgid, or sticky bit set.
+.IP \(bu 3
+The operation mode is set to compress and the
+.I file
+already has a suffix of the target file format
+.RB ( .xz
+or
+.B .txz
+when compressing to the
+.B .xz
+format, and
+.B .lzma
+or
+.B .tlz
+when compressing to the
+.B .lzma
+format).
+.IP \(bu 3
+The operation mode is set to decompress and the
+.I file
+doesn't have a suffix of any of the supported file formats
+.RB ( .xz ,
+.BR .txz ,
+.BR .lzma ,
+.BR .tlz ,
+or
+.BR .lz ).
+.PP
+After successfully compressing or decompressing the
+.IR file ,
+.B xz
+copies the owner, group, permissions, access time,
+and modification time from the source
+.I file
+to the target file.
+If copying the group fails, the permissions are modified
+so that the target file doesn't become accessible to users
+who didn't have permission to access the source
+.IR file .
+.B xz
+doesn't support copying other metadata like access control lists
+or extended attributes yet.
+.PP
+Once the target file has been successfully closed, the source
+.I file
+is removed unless
+.B \-\-keep
+was specified.
+The source
+.I file
+is never removed if the output is written to standard output
+or if an error occurs.
+.PP
+Sending
+.B SIGINFO
+or
+.B SIGUSR1
+to the
+.B xz
+process makes it print progress information to standard error.
+This has only limited use since when standard error
+is a terminal, using
+.B \-\-verbose
+will display an automatically updating progress indicator.
+.
+.SS "Memory usage"
+The memory usage of
+.B xz
+varies from a few hundred kilobytes to several gigabytes
+depending on the compression settings.
+The settings used when compressing a file determine
+the memory requirements of the decompressor.
+Typically the decompressor needs 5\ % to 20\ % of
+the amount of memory that the compressor needed when
+creating the file.
+For example, decompressing a file created with
+.B xz \-9
+currently requires 65\ MiB of memory.
+Still, it is possible to have
+.B .xz
+files that require several gigabytes of memory to decompress.
+.PP
+Especially users of older systems may find
+the possibility of very large memory usage annoying.
+To prevent uncomfortable surprises,
+.B xz
+has a built-in memory usage limiter, which is disabled by default.
+While some operating systems provide ways to limit
+the memory usage of processes, relying on it
+wasn't deemed to be flexible enough (for example, using
+.BR ulimit (1)
+to limit virtual memory tends to cripple
+.BR mmap (2)).
+.PP
+The memory usage limiter can be enabled with
+the command line option \fB\-\-memlimit=\fIlimit\fR.
+Often it is more convenient to enable the limiter
+by default by setting the environment variable
+.BR XZ_DEFAULTS ,
+for example,
+.BR XZ_DEFAULTS=\-\-memlimit=150MiB .
+It is possible to set the limits separately
+for compression and decompression by using
+.BI \-\-memlimit\-compress= limit
+and \fB\-\-memlimit\-decompress=\fIlimit\fR.
+Using these two options outside
+.B XZ_DEFAULTS
+is rarely useful because a single run of
+.B xz
+cannot do both compression and decompression and
+.BI \-\-memlimit= limit
+(or
+.B \-M
+.IR limit )
+is shorter to type on the command line.
+.PP
+If the specified memory usage limit is exceeded when decompressing,
+.B xz
+will display an error and decompressing the file will fail.
+If the limit is exceeded when compressing,
+.B xz
+will try to scale the settings down so that the limit
+is no longer exceeded (except when using
+.B \-\-format=raw
+or
+.BR \-\-no\-adjust ).
+This way the operation won't fail unless the limit is very small.
+The scaling of the settings is done in steps that don't
+match the compression level presets, for example, if the limit is
+only slightly less than the amount required for
+.BR "xz \-9" ,
+the settings will be scaled down only a little,
+not all the way down to
+.BR "xz \-8" .
+.
+.SS "Concatenation and padding with .xz files"
+It is possible to concatenate
+.B .xz
+files as is.
+.B xz
+will decompress such files as if they were a single
+.B .xz
+file.
+.PP
+It is possible to insert padding between the concatenated parts
+or after the last part.
+The padding must consist of null bytes and the size
+of the padding must be a multiple of four bytes.
+This can be useful, for example, if the
+.B .xz
+file is stored on a medium that measures file sizes
+in 512-byte blocks.
+.PP
+Concatenation and padding are not allowed with
+.B .lzma
+files or raw streams.
+.
+.SH OPTIONS
+.
+.SS "Integer suffixes and special values"
+In most places where an integer argument is expected,
+an optional suffix is supported to easily indicate large integers.
+There must be no space between the integer and the suffix.
+.TP
+.B KiB
+Multiply the integer by 1,024 (2^10).
+.BR Ki ,
+.BR k ,
+.BR kB ,
+.BR K ,
+and
+.B KB
+are accepted as synonyms for
+.BR KiB .
+.TP
+.B MiB
+Multiply the integer by 1,048,576 (2^20).
+.BR Mi ,
+.BR m ,
+.BR M ,
+and
+.B MB
+are accepted as synonyms for
+.BR MiB .
+.TP
+.B GiB
+Multiply the integer by 1,073,741,824 (2^30).
+.BR Gi ,
+.BR g ,
+.BR G ,
+and
+.B GB
+are accepted as synonyms for
+.BR GiB .
+.PP
+The special value
+.B max
+can be used to indicate the maximum integer value
+supported by the option.
+.
+.SS "Operation mode"
+If multiple operation mode options are given,
+the last one takes effect.
+.TP
+.BR \-z ", " \-\-compress
+Compress.
+This is the default operation mode when no operation mode option
+is specified and no other operation mode is implied from
+the command name (for example,
+.B unxz
+implies
+.BR \-\-decompress ).
+.TP
+.BR \-d ", " \-\-decompress ", " \-\-uncompress
+Decompress.
+.TP
+.BR \-t ", " \-\-test
+Test the integrity of compressed
+.IR files .
+This option is equivalent to
+.B "\-\-decompress \-\-stdout"
+except that the decompressed data is discarded instead of being
+written to standard output.
+No files are created or removed.
+.TP
+.BR \-l ", " \-\-list
+Print information about compressed
+.IR files .
+No uncompressed output is produced,
+and no files are created or removed.
+In list mode, the program cannot read
+the compressed data from standard
+input or from other unseekable sources.
+.IP ""
+The default listing shows basic information about
+.IR files ,
+one file per line.
+To get more detailed information, use also the
+.B \-\-verbose
+option.
+For even more information, use
+.B \-\-verbose
+twice, but note that this may be slow, because getting all the extra
+information requires many seeks.
+The width of verbose output exceeds
+80 characters, so piping the output to, for example,
+.B "less\ \-S"
+may be convenient if the terminal isn't wide enough.
+.IP ""
+The exact output may vary between
+.B xz
+versions and different locales.
+For machine-readable output,
+.B \-\-robot \-\-list
+should be used.
+.
+.SS "Operation modifiers"
+.TP
+.BR \-k ", " \-\-keep
+Don't delete the input files.
+.IP ""
+Since
+.B xz
+5.2.6,
+this option also makes
+.B xz
+compress or decompress even if the input is
+a symbolic link to a regular file,
+has more than one hard link,
+or has the setuid, setgid, or sticky bit set.
+The setuid, setgid, and sticky bits are not copied
+to the target file.
+In earlier versions this was only done with
+.BR \-\-force .
+.TP
+.BR \-f ", " \-\-force
+This option has several effects:
+.RS
+.IP \(bu 3
+If the target file already exists,
+delete it before compressing or decompressing.
+.IP \(bu 3
+Compress or decompress even if the input is
+a symbolic link to a regular file,
+has more than one hard link,
+or has the setuid, setgid, or sticky bit set.
+The setuid, setgid, and sticky bits are not copied
+to the target file.
+.IP \(bu 3
+When used with
+.B \-\-decompress
+.B \-\-stdout
+and
+.B xz
+cannot recognize the type of the source file,
+copy the source file as is to standard output.
+This allows
+.B xzcat
+.B \-\-force
+to be used like
+.BR cat (1)
+for files that have not been compressed with
+.BR xz .
+Note that in future,
+.B xz
+might support new compressed file formats, which may make
+.B xz
+decompress more types of files instead of copying them as is to
+standard output.
+.BI \-\-format= format
+can be used to restrict
+.B xz
+to decompress only a single file format.
+.RE
+.TP
+.BR \-c ", " \-\-stdout ", " \-\-to\-stdout
+Write the compressed or decompressed data to
+standard output instead of a file.
+This implies
+.BR \-\-keep .
+.TP
+.B \-\-single\-stream
+Decompress only the first
+.B .xz
+stream, and
+silently ignore possible remaining input data following the stream.
+Normally such trailing garbage makes
+.B xz
+display an error.
+.IP ""
+.B xz
+never decompresses more than one stream from
+.B .lzma
+files or raw streams, but this option still makes
+.B xz
+ignore the possible trailing data after the
+.B .lzma
+file or raw stream.
+.IP ""
+This option has no effect if the operation mode is not
+.B \-\-decompress
+or
+.BR \-\-test .
+.TP
+.B \-\-no\-sparse
+Disable creation of sparse files.
+By default, if decompressing into a regular file,
+.B xz
+tries to make the file sparse if the decompressed data contains
+long sequences of binary zeros.
+It also works when writing to standard output
+as long as standard output is connected to a regular file
+and certain additional conditions are met to make it safe.
+Creating sparse files may save disk space and speed up
+the decompression by reducing the amount of disk I/O.
+.TP
+\fB\-S\fR \fI.suf\fR, \fB\-\-suffix=\fI.suf
+When compressing, use
+.I .suf
+as the suffix for the target file instead of
+.B .xz
+or
+.BR .lzma .
+If not writing to standard output and
+the source file already has the suffix
+.IR .suf ,
+a warning is displayed and the file is skipped.
+.IP ""
+When decompressing, recognize files with the suffix
+.I .suf
+in addition to files with the
+.BR .xz ,
+.BR .txz ,
+.BR .lzma ,
+.BR .tlz ,
+or
+.B .lz
+suffix.
+If the source file has the suffix
+.IR .suf ,
+the suffix is removed to get the target filename.
+.IP ""
+When compressing or decompressing raw streams
+.RB ( \-\-format=raw ),
+the suffix must always be specified unless
+writing to standard output,
+because there is no default suffix for raw streams.
+.TP
+\fB\-\-files\fR[\fB=\fIfile\fR]
+Read the filenames to process from
+.IR file ;
+if
+.I file
+is omitted, filenames are read from standard input.
+Filenames must be terminated with the newline character.
+A dash
+.RB ( \- )
+is taken as a regular filename; it doesn't mean standard input.
+If filenames are given also as command line arguments, they are
+processed before the filenames read from
+.IR file .
+.TP
+\fB\-\-files0\fR[\fB=\fIfile\fR]
+This is identical to \fB\-\-files\fR[\fB=\fIfile\fR] except
+that each filename must be terminated with the null character.
+.
+.SS "Basic file format and compression options"
+.TP
+\fB\-F\fR \fIformat\fR, \fB\-\-format=\fIformat
+Specify the file
+.I format
+to compress or decompress:
+.RS
+.TP
+.B auto
+This is the default.
+When compressing,
+.B auto
+is equivalent to
+.BR xz .
+When decompressing,
+the format of the input file is automatically detected.
+Note that raw streams (created with
+.BR \-\-format=raw )
+cannot be auto-detected.
+.TP
+.B xz
+Compress to the
+.B .xz
+file format, or accept only
+.B .xz
+files when decompressing.
+.TP
+.BR lzma ", " alone
+Compress to the legacy
+.B .lzma
+file format, or accept only
+.B .lzma
+files when decompressing.
+The alternative name
+.B alone
+is provided for backwards compatibility with LZMA Utils.
+.TP
+.B lzip
+Accept only
+.B .lz
+files when decompressing.
+Compression is not supported.
+.IP ""
+The
+.B .lz
+format version 0 and the unextended version 1 are supported.
+Version 0 files were produced by
+.B lzip
+1.3 and older.
+Such files aren't common but may be found from file archives
+as a few source packages were released in this format.
+People might have old personal files in this format too.
+Decompression support for the format version 0 was removed in
+.B lzip
+1.18.
+.IP ""
+.B lzip
+1.4 and later create files in the format version 1.
+The sync flush marker extension to the format version 1 was added in
+.B lzip
+1.6.
+This extension is rarely used and isn't supported by
+.B xz
+(diagnosed as corrupt input).
+.TP
+.B raw
+Compress or uncompress a raw stream (no headers).
+This is meant for advanced users only.
+To decode raw streams, you need use
+.B \-\-format=raw
+and explicitly specify the filter chain,
+which normally would have been stored in the container headers.
+.RE
+.TP
+\fB\-C\fR \fIcheck\fR, \fB\-\-check=\fIcheck
+Specify the type of the integrity check.
+The check is calculated from the uncompressed data and
+stored in the
+.B .xz
+file.
+This option has an effect only when compressing into the
+.B .xz
+format; the
+.B .lzma
+format doesn't support integrity checks.
+The integrity check (if any) is verified when the
+.B .xz
+file is decompressed.
+.IP ""
+Supported
+.I check
+types:
+.RS
+.TP
+.B none
+Don't calculate an integrity check at all.
+This is usually a bad idea.
+This can be useful when integrity of the data is verified
+by other means anyway.
+.TP
+.B crc32
+Calculate CRC32 using the polynomial from IEEE-802.3 (Ethernet).
+.TP
+.B crc64
+Calculate CRC64 using the polynomial from ECMA-182.
+This is the default, since it is slightly better than CRC32
+at detecting damaged files and the speed difference is negligible.
+.TP
+.B sha256
+Calculate SHA-256.
+This is somewhat slower than CRC32 and CRC64.
+.RE
+.IP ""
+Integrity of the
+.B .xz
+headers is always verified with CRC32.
+It is not possible to change or disable it.
+.TP
+.B \-\-ignore\-check
+Don't verify the integrity check of the compressed data when decompressing.
+The CRC32 values in the
+.B .xz
+headers will still be verified normally.
+.IP ""
+.B "Do not use this option unless you know what you are doing."
+Possible reasons to use this option:
+.RS
+.IP \(bu 3
+Trying to recover data from a corrupt .xz file.
+.IP \(bu 3
+Speeding up decompression.
+This matters mostly with SHA-256 or
+with files that have compressed extremely well.
+It's recommended to not use this option for this purpose
+unless the file integrity is verified externally in some other way.
+.RE
+.TP
+.BR \-0 " ... " \-9
+Select a compression preset level.
+The default is
+.BR \-6 .
+If multiple preset levels are specified,
+the last one takes effect.
+If a custom filter chain was already specified, setting
+a compression preset level clears the custom filter chain.
+.IP ""
+The differences between the presets are more significant than with
+.BR gzip (1)
+and
+.BR bzip2 (1).
+The selected compression settings determine
+the memory requirements of the decompressor,
+thus using a too high preset level might make it painful
+to decompress the file on an old system with little RAM.
+Specifically,
+.B "it's not a good idea to blindly use \-9 for everything"
+like it often is with
+.BR gzip (1)
+and
+.BR bzip2 (1).
+.RS
+.TP
+.BR "\-0" " ... " "\-3"
+These are somewhat fast presets.
+.B \-0
+is sometimes faster than
+.B "gzip \-9"
+while compressing much better.
+The higher ones often have speed comparable to
+.BR bzip2 (1)
+with comparable or better compression ratio,
+although the results
+depend a lot on the type of data being compressed.
+.TP
+.BR "\-4" " ... " "\-6"
+Good to very good compression while keeping
+decompressor memory usage reasonable even for old systems.
+.B \-6
+is the default, which is usually a good choice
+for distributing files that need to be decompressible
+even on systems with only 16\ MiB RAM.
+.RB ( \-5e
+or
+.B \-6e
+may be worth considering too.
+See
+.BR \-\-extreme .)
+.TP
+.B "\-7 ... \-9"
+These are like
+.B \-6
+but with higher compressor and decompressor memory requirements.
+These are useful only when compressing files bigger than
+8\ MiB, 16\ MiB, and 32\ MiB, respectively.
+.RE
+.IP ""
+On the same hardware, the decompression speed is approximately
+a constant number of bytes of compressed data per second.
+In other words, the better the compression,
+the faster the decompression will usually be.
+This also means that the amount of uncompressed output
+produced per second can vary a lot.
+.IP ""
+The following table summarises the features of the presets:
+.RS
+.RS
+.PP
+.TS
+tab(;);
+c c c c c
+n n n n n.
+Preset;DictSize;CompCPU;CompMem;DecMem
+\-0;256 KiB;0;3 MiB;1 MiB
+\-1;1 MiB;1;9 MiB;2 MiB
+\-2;2 MiB;2;17 MiB;3 MiB
+\-3;4 MiB;3;32 MiB;5 MiB
+\-4;4 MiB;4;48 MiB;5 MiB
+\-5;8 MiB;5;94 MiB;9 MiB
+\-6;8 MiB;6;94 MiB;9 MiB
+\-7;16 MiB;6;186 MiB;17 MiB
+\-8;32 MiB;6;370 MiB;33 MiB
+\-9;64 MiB;6;674 MiB;65 MiB
+.TE
+.RE
+.RE
+.IP ""
+Column descriptions:
+.RS
+.IP \(bu 3
+DictSize is the LZMA2 dictionary size.
+It is waste of memory to use a dictionary bigger than
+the size of the uncompressed file.
+This is why it is good to avoid using the presets
+.BR \-7 " ... " \-9
+when there's no real need for them.
+At
+.B \-6
+and lower, the amount of memory wasted is
+usually low enough to not matter.
+.IP \(bu 3
+CompCPU is a simplified representation of the LZMA2 settings
+that affect compression speed.
+The dictionary size affects speed too,
+so while CompCPU is the same for levels
+.BR \-6 " ... " \-9 ,
+higher levels still tend to be a little slower.
+To get even slower and thus possibly better compression, see
+.BR \-\-extreme .
+.IP \(bu 3
+CompMem contains the compressor memory requirements
+in the single-threaded mode.
+It may vary slightly between
+.B xz
+versions.
+Memory requirements of some of the future multithreaded modes may
+be dramatically higher than that of the single-threaded mode.
+.IP \(bu 3
+DecMem contains the decompressor memory requirements.
+That is, the compression settings determine
+the memory requirements of the decompressor.
+The exact decompressor memory usage is slightly more than
+the LZMA2 dictionary size, but the values in the table
+have been rounded up to the next full MiB.
+.RE
+.TP
+.BR \-e ", " \-\-extreme
+Use a slower variant of the selected compression preset level
+.RB ( \-0 " ... " \-9 )
+to hopefully get a little bit better compression ratio,
+but with bad luck this can also make it worse.
+Decompressor memory usage is not affected,
+but compressor memory usage increases a little at preset levels
+.BR \-0 " ... " \-3 .
+.IP ""
+Since there are two presets with dictionary sizes
+4\ MiB and 8\ MiB, the presets
+.B \-3e
+and
+.B \-5e
+use slightly faster settings (lower CompCPU) than
+.B \-4e
+and
+.BR \-6e ,
+respectively.
+That way no two presets are identical.
+.RS
+.RS
+.PP
+.TS
+tab(;);
+c c c c c
+n n n n n.
+Preset;DictSize;CompCPU;CompMem;DecMem
+\-0e;256 KiB;8;4 MiB;1 MiB
+\-1e;1 MiB;8;13 MiB;2 MiB
+\-2e;2 MiB;8;25 MiB;3 MiB
+\-3e;4 MiB;7;48 MiB;5 MiB
+\-4e;4 MiB;8;48 MiB;5 MiB
+\-5e;8 MiB;7;94 MiB;9 MiB
+\-6e;8 MiB;8;94 MiB;9 MiB
+\-7e;16 MiB;8;186 MiB;17 MiB
+\-8e;32 MiB;8;370 MiB;33 MiB
+\-9e;64 MiB;8;674 MiB;65 MiB
+.TE
+.RE
+.RE
+.IP ""
+For example, there are a total of four presets that use
+8\ MiB dictionary, whose order from the fastest to the slowest is
+.BR \-5 ,
+.BR \-6 ,
+.BR \-5e ,
+and
+.BR \-6e .
+.TP
+.B \-\-fast
+.PD 0
+.TP
+.B \-\-best
+.PD
+These are somewhat misleading aliases for
+.B \-0
+and
+.BR \-9 ,
+respectively.
+These are provided only for backwards compatibility
+with LZMA Utils.
+Avoid using these options.
+.TP
+.BI \-\-block\-size= size
+When compressing to the
+.B .xz
+format, split the input data into blocks of
+.I size
+bytes.
+The blocks are compressed independently from each other,
+which helps with multi-threading and
+makes limited random-access decompression possible.
+This option is typically used to override the default
+block size in multi-threaded mode,
+but this option can be used in single-threaded mode too.
+.IP ""
+In multi-threaded mode about three times
+.I size
+bytes will be allocated in each thread for buffering input and output.
+The default
+.I size
+is three times the LZMA2 dictionary size or 1 MiB,
+whichever is more.
+Typically a good value is 2\(en4 times
+the size of the LZMA2 dictionary or at least 1 MiB.
+Using
+.I size
+less than the LZMA2 dictionary size is waste of RAM
+because then the LZMA2 dictionary buffer will never get fully used.
+The sizes of the blocks are stored in the block headers,
+which a future version of
+.B xz
+will use for multi-threaded decompression.
+.IP ""
+In single-threaded mode no block splitting is done by default.
+Setting this option doesn't affect memory usage.
+No size information is stored in block headers,
+thus files created in single-threaded mode
+won't be identical to files created in multi-threaded mode.
+The lack of size information also means that a future version of
+.B xz
+won't be able decompress the files in multi-threaded mode.
+.TP
+.BI \-\-block\-list= sizes
+When compressing to the
+.B .xz
+format, start a new block after
+the given intervals of uncompressed data.
+.IP ""
+The uncompressed
+.I sizes
+of the blocks are specified as a comma-separated list.
+Omitting a size (two or more consecutive commas) is a shorthand
+to use the size of the previous block.
+.IP ""
+If the input file is bigger than the sum of
+.IR sizes ,
+the last value in
+.I sizes
+is repeated until the end of the file.
+A special value of
+.B 0
+may be used as the last value to indicate that
+the rest of the file should be encoded as a single block.
+.IP ""
+If one specifies
+.I sizes
+that exceed the encoder's block size
+(either the default value in threaded mode or
+the value specified with \fB\-\-block\-size=\fIsize\fR),
+the encoder will create additional blocks while
+keeping the boundaries specified in
+.IR sizes .
+For example, if one specifies
+.B \-\-block\-size=10MiB
+.B \-\-block\-list=5MiB,10MiB,8MiB,12MiB,24MiB
+and the input file is 80 MiB,
+one will get 11 blocks:
+5, 10, 8, 10, 2, 10, 10, 4, 10, 10, and 1 MiB.
+.IP ""
+In multi-threaded mode the sizes of the blocks
+are stored in the block headers.
+This isn't done in single-threaded mode,
+so the encoded output won't be
+identical to that of the multi-threaded mode.
+.TP
+.BI \-\-flush\-timeout= timeout
+When compressing, if more than
+.I timeout
+milliseconds (a positive integer) has passed since the previous flush and
+reading more input would block,
+all the pending input data is flushed from the encoder and
+made available in the output stream.
+This can be useful if
+.B xz
+is used to compress data that is streamed over a network.
+Small
+.I timeout
+values make the data available at the receiving end
+with a small delay, but large
+.I timeout
+values give better compression ratio.
+.IP ""
+This feature is disabled by default.
+If this option is specified more than once, the last one takes effect.
+The special
+.I timeout
+value of
+.B 0
+can be used to explicitly disable this feature.
+.IP ""
+This feature is not available on non-POSIX systems.
+.IP ""
+.\" FIXME
+.B "This feature is still experimental."
+Currently
+.B xz
+is unsuitable for decompressing the stream in real time due to how
+.B xz
+does buffering.
+.TP
+.BI \-\-memlimit\-compress= limit
+Set a memory usage limit for compression.
+If this option is specified multiple times,
+the last one takes effect.
+.IP ""
+If the compression settings exceed the
+.IR limit ,
+.B xz
+will attempt to adjust the settings downwards so that
+the limit is no longer exceeded and display a notice that
+automatic adjustment was done.
+The adjustments are done in this order:
+reducing the number of threads,
+switching to single-threaded mode
+if even one thread in multi-threaded mode exceeds the
+.IR limit ,
+and finally reducing the LZMA2 dictionary size.
+.IP ""
+When compressing with
+.B \-\-format=raw
+or if
+.B \-\-no\-adjust
+has been specified,
+only the number of threads may be reduced
+since it can be done without affecting the compressed output.
+.IP ""
+If the
+.I limit
+cannot be met even with the adjustments described above,
+an error is displayed and
+.B xz
+will exit with exit status 1.
+.IP ""
+The
+.I limit
+can be specified in multiple ways:
+.RS
+.IP \(bu 3
+The
+.I limit
+can be an absolute value in bytes.
+Using an integer suffix like
+.B MiB
+can be useful.
+Example:
+.B "\-\-memlimit\-compress=80MiB"
+.IP \(bu 3
+The
+.I limit
+can be specified as a percentage of total physical memory (RAM).
+This can be useful especially when setting the
+.B XZ_DEFAULTS
+environment variable in a shell initialization script
+that is shared between different computers.
+That way the limit is automatically bigger
+on systems with more memory.
+Example:
+.B "\-\-memlimit\-compress=70%"
+.IP \(bu 3
+The
+.I limit
+can be reset back to its default value by setting it to
+.BR 0 .
+This is currently equivalent to setting the
+.I limit
+to
+.B max
+(no memory usage limit).
+.RE
+.IP ""
+For 32-bit
+.B xz
+there is a special case: if the
+.I limit
+would be over
+.BR "4020\ MiB" ,
+the
+.I limit
+is set to
+.BR "4020\ MiB" .
+On MIPS32
+.B "2000\ MiB"
+is used instead.
+(The values
+.B 0
+and
+.B max
+aren't affected by this.
+A similar feature doesn't exist for decompression.)
+This can be helpful when a 32-bit executable has access
+to 4\ GiB address space (2 GiB on MIPS32)
+while hopefully doing no harm in other situations.
+.IP ""
+See also the section
+.BR "Memory usage" .
+.TP
+.BI \-\-memlimit\-decompress= limit
+Set a memory usage limit for decompression.
+This also affects the
+.B \-\-list
+mode.
+If the operation is not possible without exceeding the
+.IR limit ,
+.B xz
+will display an error and decompressing the file will fail.
+See
+.BI \-\-memlimit\-compress= limit
+for possible ways to specify the
+.IR limit .
+.TP
+.BI \-\-memlimit\-mt\-decompress= limit
+Set a memory usage limit for multi-threaded decompression.
+This can only affect the number of threads;
+this will never make
+.B xz
+refuse to decompress a file.
+If
+.I limit
+is too low to allow any multi-threading, the
+.I limit
+is ignored and
+.B xz
+will continue in single-threaded mode.
+Note that if also
+.B \-\-memlimit\-decompress
+is used,
+it will always apply to both single-threaded and multi-threaded modes,
+and so the effective
+.I limit
+for multi-threading will never be higher than the limit set with
+.BR \-\-memlimit\-decompress .
+.IP ""
+In contrast to the other memory usage limit options,
+.BI \-\-memlimit\-mt\-decompress= limit
+has a system-specific default
+.IR limit .
+.B "xz \-\-info\-memory"
+can be used to see the current value.
+.IP ""
+This option and its default value exist
+because without any limit the threaded decompressor
+could end up allocating an insane amount of memory with some input files.
+If the default
+.I limit
+is too low on your system,
+feel free to increase the
+.I limit
+but never set it to a value larger than the amount of usable RAM
+as with appropriate input files
+.B xz
+will attempt to use that amount of memory
+even with a low number of threads.
+Running out of memory or swapping
+will not improve decompression performance.
+.IP ""
+See
+.BI \-\-memlimit\-compress= limit
+for possible ways to specify the
+.IR limit .
+Setting
+.I limit
+to
+.B 0
+resets the
+.I limit
+to the default system-specific value.
+.TP
+\fB\-M\fR \fIlimit\fR, \fB\-\-memlimit=\fIlimit\fR, \fB\-\-memory=\fIlimit
+This is equivalent to specifying
+.BI \-\-memlimit\-compress= limit
+.BI \-\-memlimit-decompress= limit
+\fB\-\-memlimit\-mt\-decompress=\fIlimit\fR.
+.TP
+.B \-\-no\-adjust
+Display an error and exit if the memory usage limit cannot be
+met without adjusting settings that affect the compressed output.
+That is, this prevents
+.B xz
+from switching the encoder from multi-threaded mode to single-threaded mode
+and from reducing the LZMA2 dictionary size.
+Even when this option is used the number of threads may be reduced
+to meet the memory usage limit as that won't affect the compressed output.
+.IP ""
+Automatic adjusting is always disabled when creating raw streams
+.RB ( \-\-format=raw ).
+.TP
+\fB\-T\fR \fIthreads\fR, \fB\-\-threads=\fIthreads
+Specify the number of worker threads to use.
+Setting
+.I threads
+to a special value
+.B 0
+makes
+.B xz
+use up to as many threads as the processor(s) on the system support.
+The actual number of threads can be fewer than
+.I threads
+if the input file is not big enough
+for threading with the given settings or
+if using more threads would exceed the memory usage limit.
+.IP ""
+The single-threaded and multi-threaded compressors produce different output.
+Single-threaded compressor will give the smallest file size but
+only the output from the multi-threaded compressor can be decompressed
+using multiple threads.
+Setting
+.I threads
+to
+.B 1
+will use the single-threaded mode.
+Setting
+.I threads
+to any other value, including
+.BR 0 ,
+will use the multi-threaded compressor
+even if the system supports only one hardware thread.
+.RB ( xz
+5.2.x
+used single-threaded mode in this situation.)
+.IP ""
+To use multi-threaded mode with only one thread, set
+.I threads
+to
+.BR +1 .
+The
+.B +
+prefix has no effect with values other than
+.BR 1 .
+A memory usage limit can still make
+.B xz
+switch to single-threaded mode unless
+.B \-\-no\-adjust
+is used.
+Support for the
+.B +
+prefix was added in
+.B xz
+5.4.0.
+.IP ""
+If an automatic number of threads has been requested and
+no memory usage limit has been specified,
+then a system-specific default soft limit will be used to possibly
+limit the number of threads.
+It is a soft limit in sense that it is ignored
+if the number of threads becomes one,
+thus a soft limit will never stop
+.B xz
+from compressing or decompressing.
+This default soft limit will not make
+.B xz
+switch from multi-threaded mode to single-threaded mode.
+The active limits can be seen with
+.BR "xz \-\-info\-memory" .
+.IP ""
+Currently the only threading method is to split the input into
+blocks and compress them independently from each other.
+The default block size depends on the compression level and
+can be overridden with the
+.BI \-\-block\-size= size
+option.
+.IP ""
+Threaded decompression only works on files that contain
+multiple blocks with size information in block headers.
+All large enough files compressed in multi-threaded mode
+meet this condition,
+but files compressed in single-threaded mode don't even if
+.BI \-\-block\-size= size
+has been used.
+.
+.SS "Custom compressor filter chains"
+A custom filter chain allows specifying
+the compression settings in detail instead of relying on
+the settings associated to the presets.
+When a custom filter chain is specified,
+preset options
+.RB ( \-0
+\&...\&
+.B \-9
+and
+.BR \-\-extreme )
+earlier on the command line are forgotten.
+If a preset option is specified
+after one or more custom filter chain options,
+the new preset takes effect and
+the custom filter chain options specified earlier are forgotten.
+.PP
+A filter chain is comparable to piping on the command line.
+When compressing, the uncompressed input goes to the first filter,
+whose output goes to the next filter (if any).
+The output of the last filter gets written to the compressed file.
+The maximum number of filters in the chain is four,
+but typically a filter chain has only one or two filters.
+.PP
+Many filters have limitations on where they can be
+in the filter chain:
+some filters can work only as the last filter in the chain,
+some only as a non-last filter, and some work in any position
+in the chain.
+Depending on the filter, this limitation is either inherent to
+the filter design or exists to prevent security issues.
+.PP
+A custom filter chain is specified by using one or more
+filter options in the order they are wanted in the filter chain.
+That is, the order of filter options is significant!
+When decoding raw streams
+.RB ( \-\-format=raw ),
+the filter chain is specified in the same order as
+it was specified when compressing.
+.PP
+Filters take filter-specific
+.I options
+as a comma-separated list.
+Extra commas in
+.I options
+are ignored.
+Every option has a default value, so you need to
+specify only those you want to change.
+.PP
+To see the whole filter chain and
+.IR options ,
+use
+.B "xz \-vv"
+(that is, use
+.B \-\-verbose
+twice).
+This works also for viewing the filter chain options used by presets.
+.TP
+\fB\-\-lzma1\fR[\fB=\fIoptions\fR]
+.PD 0
+.TP
+\fB\-\-lzma2\fR[\fB=\fIoptions\fR]
+.PD
+Add LZMA1 or LZMA2 filter to the filter chain.
+These filters can be used only as the last filter in the chain.
+.IP ""
+LZMA1 is a legacy filter,
+which is supported almost solely due to the legacy
+.B .lzma
+file format, which supports only LZMA1.
+LZMA2 is an updated
+version of LZMA1 to fix some practical issues of LZMA1.
+The
+.B .xz
+format uses LZMA2 and doesn't support LZMA1 at all.
+Compression speed and ratios of LZMA1 and LZMA2
+are practically the same.
+.IP ""
+LZMA1 and LZMA2 share the same set of
+.IR options :
+.RS
+.TP
+.BI preset= preset
+Reset all LZMA1 or LZMA2
+.I options
+to
+.IR preset .
+.I Preset
+consist of an integer, which may be followed by single-letter
+preset modifiers.
+The integer can be from
+.B 0
+to
+.BR 9 ,
+matching the command line options
+.B \-0
+\&...\&
+.BR \-9 .
+The only supported modifier is currently
+.BR e ,
+which matches
+.BR \-\-extreme .
+If no
+.B preset
+is specified, the default values of LZMA1 or LZMA2
+.I options
+are taken from the preset
+.BR 6 .
+.TP
+.BI dict= size
+Dictionary (history buffer)
+.I size
+indicates how many bytes of the recently processed
+uncompressed data is kept in memory.
+The algorithm tries to find repeating byte sequences (matches) in
+the uncompressed data, and replace them with references
+to the data currently in the dictionary.
+The bigger the dictionary, the higher is the chance
+to find a match.
+Thus, increasing dictionary
+.I size
+usually improves compression ratio, but
+a dictionary bigger than the uncompressed file is waste of memory.
+.IP ""
+Typical dictionary
+.I size
+is from 64\ KiB to 64\ MiB.
+The minimum is 4\ KiB.
+The maximum for compression is currently 1.5\ GiB (1536\ MiB).
+The decompressor already supports dictionaries up to
+one byte less than 4\ GiB, which is the maximum for
+the LZMA1 and LZMA2 stream formats.
+.IP ""
+Dictionary
+.I size
+and match finder
+.RI ( mf )
+together determine the memory usage of the LZMA1 or LZMA2 encoder.
+The same (or bigger) dictionary
+.I size
+is required for decompressing that was used when compressing,
+thus the memory usage of the decoder is determined
+by the dictionary size used when compressing.
+The
+.B .xz
+headers store the dictionary
+.I size
+either as
+.RI "2^" n
+or
+.RI "2^" n " + 2^(" n "\-1),"
+so these
+.I sizes
+are somewhat preferred for compression.
+Other
+.I sizes
+will get rounded up when stored in the
+.B .xz
+headers.
+.TP
+.BI lc= lc
+Specify the number of literal context bits.
+The minimum is 0 and the maximum is 4; the default is 3.
+In addition, the sum of
+.I lc
+and
+.I lp
+must not exceed 4.
+.IP ""
+All bytes that cannot be encoded as matches
+are encoded as literals.
+That is, literals are simply 8-bit bytes
+that are encoded one at a time.
+.IP ""
+The literal coding makes an assumption that the highest
+.I lc
+bits of the previous uncompressed byte correlate
+with the next byte.
+For example, in typical English text, an upper-case letter is
+often followed by a lower-case letter, and a lower-case
+letter is usually followed by another lower-case letter.
+In the US-ASCII character set, the highest three bits are 010
+for upper-case letters and 011 for lower-case letters.
+When
+.I lc
+is at least 3, the literal coding can take advantage of
+this property in the uncompressed data.
+.IP ""
+The default value (3) is usually good.
+If you want maximum compression, test
+.BR lc=4 .
+Sometimes it helps a little, and
+sometimes it makes compression worse.
+If it makes it worse, test
+.B lc=2
+too.
+.TP
+.BI lp= lp
+Specify the number of literal position bits.
+The minimum is 0 and the maximum is 4; the default is 0.
+.IP ""
+.I Lp
+affects what kind of alignment in the uncompressed data is
+assumed when encoding literals.
+See
+.I pb
+below for more information about alignment.
+.TP
+.BI pb= pb
+Specify the number of position bits.
+The minimum is 0 and the maximum is 4; the default is 2.
+.IP ""
+.I Pb
+affects what kind of alignment in the uncompressed data is
+assumed in general.
+The default means four-byte alignment
+.RI (2^ pb =2^2=4),
+which is often a good choice when there's no better guess.
+.IP ""
+When the alignment is known, setting
+.I pb
+accordingly may reduce the file size a little.
+For example, with text files having one-byte
+alignment (US-ASCII, ISO-8859-*, UTF-8), setting
+.B pb=0
+can improve compression slightly.
+For UTF-16 text,
+.B pb=1
+is a good choice.
+If the alignment is an odd number like 3 bytes,
+.B pb=0
+might be the best choice.
+.IP ""
+Even though the assumed alignment can be adjusted with
+.I pb
+and
+.IR lp ,
+LZMA1 and LZMA2 still slightly favor 16-byte alignment.
+It might be worth taking into account when designing file formats
+that are likely to be often compressed with LZMA1 or LZMA2.
+.TP
+.BI mf= mf
+Match finder has a major effect on encoder speed,
+memory usage, and compression ratio.
+Usually Hash Chain match finders are faster than Binary Tree
+match finders.
+The default depends on the
+.IR preset :
+0 uses
+.BR hc3 ,
+1\(en3
+use
+.BR hc4 ,
+and the rest use
+.BR bt4 .
+.IP ""
+The following match finders are supported.
+The memory usage formulas below are rough approximations,
+which are closest to the reality when
+.I dict
+is a power of two.
+.RS
+.TP
+.B hc3
+Hash Chain with 2- and 3-byte hashing
+.br
+Minimum value for
+.IR nice :
+3
+.br
+Memory usage:
+.br
+.I dict
+* 7.5 (if
+.I dict
+<= 16 MiB);
+.br
+.I dict
+* 5.5 + 64 MiB (if
+.I dict
+> 16 MiB)
+.TP
+.B hc4
+Hash Chain with 2-, 3-, and 4-byte hashing
+.br
+Minimum value for
+.IR nice :
+4
+.br
+Memory usage:
+.br
+.I dict
+* 7.5 (if
+.I dict
+<= 32 MiB);
+.br
+.I dict
+* 6.5 (if
+.I dict
+> 32 MiB)
+.TP
+.B bt2
+Binary Tree with 2-byte hashing
+.br
+Minimum value for
+.IR nice :
+2
+.br
+Memory usage:
+.I dict
+* 9.5
+.TP
+.B bt3
+Binary Tree with 2- and 3-byte hashing
+.br
+Minimum value for
+.IR nice :
+3
+.br
+Memory usage:
+.br
+.I dict
+* 11.5 (if
+.I dict
+<= 16 MiB);
+.br
+.I dict
+* 9.5 + 64 MiB (if
+.I dict
+> 16 MiB)
+.TP
+.B bt4
+Binary Tree with 2-, 3-, and 4-byte hashing
+.br
+Minimum value for
+.IR nice :
+4
+.br
+Memory usage:
+.br
+.I dict
+* 11.5 (if
+.I dict
+<= 32 MiB);
+.br
+.I dict
+* 10.5 (if
+.I dict
+> 32 MiB)
+.RE
+.TP
+.BI mode= mode
+Compression
+.I mode
+specifies the method to analyze
+the data produced by the match finder.
+Supported
+.I modes
+are
+.B fast
+and
+.BR normal .
+The default is
+.B fast
+for
+.I presets
+0\(en3 and
+.B normal
+for
+.I presets
+4\(en9.
+.IP ""
+Usually
+.B fast
+is used with Hash Chain match finders and
+.B normal
+with Binary Tree match finders.
+This is also what the
+.I presets
+do.
+.TP
+.BI nice= nice
+Specify what is considered to be a nice length for a match.
+Once a match of at least
+.I nice
+bytes is found, the algorithm stops
+looking for possibly better matches.
+.IP ""
+.I Nice
+can be 2\(en273 bytes.
+Higher values tend to give better compression ratio
+at the expense of speed.
+The default depends on the
+.IR preset .
+.TP
+.BI depth= depth
+Specify the maximum search depth in the match finder.
+The default is the special value of 0,
+which makes the compressor determine a reasonable
+.I depth
+from
+.I mf
+and
+.IR nice .
+.IP ""
+Reasonable
+.I depth
+for Hash Chains is 4\(en100 and 16\(en1000 for Binary Trees.
+Using very high values for
+.I depth
+can make the encoder extremely slow with some files.
+Avoid setting the
+.I depth
+over 1000 unless you are prepared to interrupt
+the compression in case it is taking far too long.
+.RE
+.IP ""
+When decoding raw streams
+.RB ( \-\-format=raw ),
+LZMA2 needs only the dictionary
+.IR size .
+LZMA1 needs also
+.IR lc ,
+.IR lp ,
+and
+.IR pb .
+.TP
+\fB\-\-x86\fR[\fB=\fIoptions\fR]
+.PD 0
+.TP
+\fB\-\-arm\fR[\fB=\fIoptions\fR]
+.TP
+\fB\-\-armthumb\fR[\fB=\fIoptions\fR]
+.TP
+\fB\-\-arm64\fR[\fB=\fIoptions\fR]
+.TP
+\fB\-\-powerpc\fR[\fB=\fIoptions\fR]
+.TP
+\fB\-\-ia64\fR[\fB=\fIoptions\fR]
+.TP
+\fB\-\-sparc\fR[\fB=\fIoptions\fR]
+.PD
+Add a branch/call/jump (BCJ) filter to the filter chain.
+These filters can be used only as a non-last filter
+in the filter chain.
+.IP ""
+A BCJ filter converts relative addresses in
+the machine code to their absolute counterparts.
+This doesn't change the size of the data
+but it increases redundancy,
+which can help LZMA2 to produce 0\(en15\ % smaller
+.B .xz
+file.
+The BCJ filters are always reversible,
+so using a BCJ filter for wrong type of data
+doesn't cause any data loss, although it may make
+the compression ratio slightly worse.
+The BCJ filters are very fast and
+use an insignificant amount of memory.
+.IP ""
+These BCJ filters have known problems related to
+the compression ratio:
+.RS
+.IP \(bu 3
+Some types of files containing executable code
+(for example, object files, static libraries, and Linux kernel modules)
+have the addresses in the instructions filled with filler values.
+These BCJ filters will still do the address conversion,
+which will make the compression worse with these files.
+.IP \(bu 3
+If a BCJ filter is applied on an archive,
+it is possible that it makes the compression ratio
+worse than not using a BCJ filter.
+For example, if there are similar or even identical executables
+then filtering will likely make the files less similar
+and thus compression is worse.
+The contents of non-executable files in the same archive can matter too.
+In practice one has to try with and without a BCJ filter to see
+which is better in each situation.
+.RE
+.IP ""
+Different instruction sets have different alignment:
+the executable file must be aligned to a multiple of
+this value in the input data to make the filter work.
+.RS
+.RS
+.PP
+.TS
+tab(;);
+l n l
+l n l.
+Filter;Alignment;Notes
+x86;1;32-bit or 64-bit x86
+ARM;4;
+ARM-Thumb;2;
+ARM64;4;4096-byte alignment is best
+PowerPC;4;Big endian only
+IA-64;16;Itanium
+SPARC;4;
+.TE
+.RE
+.RE
+.IP ""
+Since the BCJ-filtered data is usually compressed with LZMA2,
+the compression ratio may be improved slightly if
+the LZMA2 options are set to match the
+alignment of the selected BCJ filter.
+For example, with the IA-64 filter, it's good to set
+.B pb=4
+or even
+.B pb=4,lp=4,lc=0
+with LZMA2 (2^4=16).
+The x86 filter is an exception;
+it's usually good to stick to LZMA2's default
+four-byte alignment when compressing x86 executables.
+.IP ""
+All BCJ filters support the same
+.IR options :
+.RS
+.TP
+.BI start= offset
+Specify the start
+.I offset
+that is used when converting between relative
+and absolute addresses.
+The
+.I offset
+must be a multiple of the alignment of the filter
+(see the table above).
+The default is zero.
+In practice, the default is good; specifying a custom
+.I offset
+is almost never useful.
+.RE
+.TP
+\fB\-\-delta\fR[\fB=\fIoptions\fR]
+Add the Delta filter to the filter chain.
+The Delta filter can be only used as a non-last filter
+in the filter chain.
+.IP ""
+Currently only simple byte-wise delta calculation is supported.
+It can be useful when compressing, for example, uncompressed bitmap images
+or uncompressed PCM audio.
+However, special purpose algorithms may give significantly better
+results than Delta + LZMA2.
+This is true especially with audio,
+which compresses faster and better, for example, with
+.BR flac (1).
+.IP ""
+Supported
+.IR options :
+.RS
+.TP
+.BI dist= distance
+Specify the
+.I distance
+of the delta calculation in bytes.
+.I distance
+must be 1\(en256.
+The default is 1.
+.IP ""
+For example, with
+.B dist=2
+and eight-byte input A1 B1 A2 B3 A3 B5 A4 B7, the output will be
+A1 B1 01 02 01 02 01 02.
+.RE
+.
+.SS "Other options"
+.TP
+.BR \-q ", " \-\-quiet
+Suppress warnings and notices.
+Specify this twice to suppress errors too.
+This option has no effect on the exit status.
+That is, even if a warning was suppressed,
+the exit status to indicate a warning is still used.
+.TP
+.BR \-v ", " \-\-verbose
+Be verbose.
+If standard error is connected to a terminal,
+.B xz
+will display a progress indicator.
+Specifying
+.B \-\-verbose
+twice will give even more verbose output.
+.IP ""
+The progress indicator shows the following information:
+.RS
+.IP \(bu 3
+Completion percentage is shown
+if the size of the input file is known.
+That is, the percentage cannot be shown in pipes.
+.IP \(bu 3
+Amount of compressed data produced (compressing)
+or consumed (decompressing).
+.IP \(bu 3
+Amount of uncompressed data consumed (compressing)
+or produced (decompressing).
+.IP \(bu 3
+Compression ratio, which is calculated by dividing
+the amount of compressed data processed so far by
+the amount of uncompressed data processed so far.
+.IP \(bu 3
+Compression or decompression speed.
+This is measured as the amount of uncompressed data consumed
+(compression) or produced (decompression) per second.
+It is shown after a few seconds have passed since
+.B xz
+started processing the file.
+.IP \(bu 3
+Elapsed time in the format M:SS or H:MM:SS.
+.IP \(bu 3
+Estimated remaining time is shown
+only when the size of the input file is
+known and a couple of seconds have already passed since
+.B xz
+started processing the file.
+The time is shown in a less precise format which
+never has any colons, for example, 2 min 30 s.
+.RE
+.IP ""
+When standard error is not a terminal,
+.B \-\-verbose
+will make
+.B xz
+print the filename, compressed size, uncompressed size,
+compression ratio, and possibly also the speed and elapsed time
+on a single line to standard error after compressing or
+decompressing the file.
+The speed and elapsed time are included only when
+the operation took at least a few seconds.
+If the operation didn't finish, for example, due to user interruption,
+also the completion percentage is printed
+if the size of the input file is known.
+.TP
+.BR \-Q ", " \-\-no\-warn
+Don't set the exit status to 2
+even if a condition worth a warning was detected.
+This option doesn't affect the verbosity level, thus both
+.B \-\-quiet
+and
+.B \-\-no\-warn
+have to be used to not display warnings and
+to not alter the exit status.
+.TP
+.B \-\-robot
+Print messages in a machine-parsable format.
+This is intended to ease writing frontends that want to use
+.B xz
+instead of liblzma, which may be the case with various scripts.
+The output with this option enabled is meant to be stable across
+.B xz
+releases.
+See the section
+.B "ROBOT MODE"
+for details.
+.TP
+.B \-\-info\-memory
+Display, in human-readable format, how much physical memory (RAM)
+and how many processor threads
+.B xz
+thinks the system has and the memory usage limits for compression
+and decompression, and exit successfully.
+.TP
+.BR \-h ", " \-\-help
+Display a help message describing the most commonly used options,
+and exit successfully.
+.TP
+.BR \-H ", " \-\-long\-help
+Display a help message describing all features of
+.BR xz ,
+and exit successfully
+.TP
+.BR \-V ", " \-\-version
+Display the version number of
+.B xz
+and liblzma in human readable format.
+To get machine-parsable output, specify
+.B \-\-robot
+before
+.BR \-\-version .
+.
+.SH "ROBOT MODE"
+The robot mode is activated with the
+.B \-\-robot
+option.
+It makes the output of
+.B xz
+easier to parse by other programs.
+Currently
+.B \-\-robot
+is supported only together with
+.BR \-\-version ,
+.BR \-\-info\-memory ,
+and
+.BR \-\-list .
+It will be supported for compression and
+decompression in the future.
+.
+.SS Version
+.B "xz \-\-robot \-\-version"
+prints the version number of
+.B xz
+and liblzma in the following format:
+.PP
+.BI XZ_VERSION= XYYYZZZS
+.br
+.BI LIBLZMA_VERSION= XYYYZZZS
+.TP
+.I X
+Major version.
+.TP
+.I YYY
+Minor version.
+Even numbers are stable.
+Odd numbers are alpha or beta versions.
+.TP
+.I ZZZ
+Patch level for stable releases or
+just a counter for development releases.
+.TP
+.I S
+Stability.
+0 is alpha, 1 is beta, and 2 is stable.
+.I S
+should be always 2 when
+.I YYY
+is even.
+.PP
+.I XYYYZZZS
+are the same on both lines if
+.B xz
+and liblzma are from the same XZ Utils release.
+.PP
+Examples: 4.999.9beta is
+.B 49990091
+and
+5.0.0 is
+.BR 50000002 .
+.
+.SS "Memory limit information"
+.B "xz \-\-robot \-\-info\-memory"
+prints a single line with multiple tab-separated columns:
+.IP 1. 4
+Total amount of physical memory (RAM) in bytes.
+.IP 2. 4
+Memory usage limit for compression in bytes
+.RB ( \-\-memlimit\-compress ).
+A special value of
+.B 0
+indicates the default setting
+which for single-threaded mode is the same as no limit.
+.IP 3. 4
+Memory usage limit for decompression in bytes
+.RB ( \-\-memlimit\-decompress ).
+A special value of
+.B 0
+indicates the default setting
+which for single-threaded mode is the same as no limit.
+.IP 4. 4
+Since
+.B xz
+5.3.4alpha:
+Memory usage for multi-threaded decompression in bytes
+.RB ( \-\-memlimit\-mt\-decompress ).
+This is never zero because a system-specific default value
+shown in the column 5
+is used if no limit has been specified explicitly.
+This is also never greater than the value in the column 3
+even if a larger value has been specified with
+.BR \-\-memlimit\-mt\-decompress .
+.IP 5. 4
+Since
+.B xz
+5.3.4alpha:
+A system-specific default memory usage limit
+that is used to limit the number of threads
+when compressing with an automatic number of threads
+.RB ( \-\-threads=0 )
+and no memory usage limit has been specified
+.RB ( \-\-memlimit\-compress ).
+This is also used as the default value for
+.BR \-\-memlimit\-mt\-decompress .
+.IP 6. 4
+Since
+.B xz
+5.3.4alpha:
+Number of available processor threads.
+.PP
+In the future, the output of
+.B "xz \-\-robot \-\-info\-memory"
+may have more columns, but never more than a single line.
+.
+.SS "List mode"
+.B "xz \-\-robot \-\-list"
+uses tab-separated output.
+The first column of every line has a string
+that indicates the type of the information found on that line:
+.TP
+.B name
+This is always the first line when starting to list a file.
+The second column on the line is the filename.
+.TP
+.B file
+This line contains overall information about the
+.B .xz
+file.
+This line is always printed after the
+.B name
+line.
+.TP
+.B stream
+This line type is used only when
+.B \-\-verbose
+was specified.
+There are as many
+.B stream
+lines as there are streams in the
+.B .xz
+file.
+.TP
+.B block
+This line type is used only when
+.B \-\-verbose
+was specified.
+There are as many
+.B block
+lines as there are blocks in the
+.B .xz
+file.
+The
+.B block
+lines are shown after all the
+.B stream
+lines; different line types are not interleaved.
+.TP
+.B summary
+This line type is used only when
+.B \-\-verbose
+was specified twice.
+This line is printed after all
+.B block
+lines.
+Like the
+.B file
+line, the
+.B summary
+line contains overall information about the
+.B .xz
+file.
+.TP
+.B totals
+This line is always the very last line of the list output.
+It shows the total counts and sizes.
+.PP
+The columns of the
+.B file
+lines:
+.PD 0
+.RS
+.IP 2. 4
+Number of streams in the file
+.IP 3. 4
+Total number of blocks in the stream(s)
+.IP 4. 4
+Compressed size of the file
+.IP 5. 4
+Uncompressed size of the file
+.IP 6. 4
+Compression ratio, for example,
+.BR 0.123 .
+If ratio is over 9.999, three dashes
+.RB ( \-\-\- )
+are displayed instead of the ratio.
+.IP 7. 4
+Comma-separated list of integrity check names.
+The following strings are used for the known check types:
+.BR None ,
+.BR CRC32 ,
+.BR CRC64 ,
+and
+.BR SHA\-256 .
+For unknown check types,
+.BI Unknown\- N
+is used, where
+.I N
+is the Check ID as a decimal number (one or two digits).
+.IP 8. 4
+Total size of stream padding in the file
+.RE
+.PD
+.PP
+The columns of the
+.B stream
+lines:
+.PD 0
+.RS
+.IP 2. 4
+Stream number (the first stream is 1)
+.IP 3. 4
+Number of blocks in the stream
+.IP 4. 4
+Compressed start offset
+.IP 5. 4
+Uncompressed start offset
+.IP 6. 4
+Compressed size (does not include stream padding)
+.IP 7. 4
+Uncompressed size
+.IP 8. 4
+Compression ratio
+.IP 9. 4
+Name of the integrity check
+.IP 10. 4
+Size of stream padding
+.RE
+.PD
+.PP
+The columns of the
+.B block
+lines:
+.PD 0
+.RS
+.IP 2. 4
+Number of the stream containing this block
+.IP 3. 4
+Block number relative to the beginning of the stream
+(the first block is 1)
+.IP 4. 4
+Block number relative to the beginning of the file
+.IP 5. 4
+Compressed start offset relative to the beginning of the file
+.IP 6. 4
+Uncompressed start offset relative to the beginning of the file
+.IP 7. 4
+Total compressed size of the block (includes headers)
+.IP 8. 4
+Uncompressed size
+.IP 9. 4
+Compression ratio
+.IP 10. 4
+Name of the integrity check
+.RE
+.PD
+.PP
+If
+.B \-\-verbose
+was specified twice, additional columns are included on the
+.B block
+lines.
+These are not displayed with a single
+.BR \-\-verbose ,
+because getting this information requires many seeks
+and can thus be slow:
+.PD 0
+.RS
+.IP 11. 4
+Value of the integrity check in hexadecimal
+.IP 12. 4
+Block header size
+.IP 13. 4
+Block flags:
+.B c
+indicates that compressed size is present, and
+.B u
+indicates that uncompressed size is present.
+If the flag is not set, a dash
+.RB ( \- )
+is shown instead to keep the string length fixed.
+New flags may be added to the end of the string in the future.
+.IP 14. 4
+Size of the actual compressed data in the block (this excludes
+the block header, block padding, and check fields)
+.IP 15. 4
+Amount of memory (in bytes) required to decompress
+this block with this
+.B xz
+version
+.IP 16. 4
+Filter chain.
+Note that most of the options used at compression time
+cannot be known, because only the options
+that are needed for decompression are stored in the
+.B .xz
+headers.
+.RE
+.PD
+.PP
+The columns of the
+.B summary
+lines:
+.PD 0
+.RS
+.IP 2. 4
+Amount of memory (in bytes) required to decompress
+this file with this
+.B xz
+version
+.IP 3. 4
+.B yes
+or
+.B no
+indicating if all block headers have both compressed size and
+uncompressed size stored in them
+.PP
+.I Since
+.B xz
+.I 5.1.2alpha:
+.IP 4. 4
+Minimum
+.B xz
+version required to decompress the file
+.RE
+.PD
+.PP
+The columns of the
+.B totals
+line:
+.PD 0
+.RS
+.IP 2. 4
+Number of streams
+.IP 3. 4
+Number of blocks
+.IP 4. 4
+Compressed size
+.IP 5. 4
+Uncompressed size
+.IP 6. 4
+Average compression ratio
+.IP 7. 4
+Comma-separated list of integrity check names
+that were present in the files
+.IP 8. 4
+Stream padding size
+.IP 9. 4
+Number of files.
+This is here to
+keep the order of the earlier columns the same as on
+.B file
+lines.
+.PD
+.RE
+.PP
+If
+.B \-\-verbose
+was specified twice, additional columns are included on the
+.B totals
+line:
+.PD 0
+.RS
+.IP 10. 4
+Maximum amount of memory (in bytes) required to decompress
+the files with this
+.B xz
+version
+.IP 11. 4
+.B yes
+or
+.B no
+indicating if all block headers have both compressed size and
+uncompressed size stored in them
+.PP
+.I Since
+.B xz
+.I 5.1.2alpha:
+.IP 12. 4
+Minimum
+.B xz
+version required to decompress the file
+.RE
+.PD
+.PP
+Future versions may add new line types and
+new columns can be added to the existing line types,
+but the existing columns won't be changed.
+.
+.SH "EXIT STATUS"
+.TP
+.B 0
+All is good.
+.TP
+.B 1
+An error occurred.
+.TP
+.B 2
+Something worth a warning occurred,
+but no actual errors occurred.
+.PP
+Notices (not warnings or errors) printed on standard error
+don't affect the exit status.
+.
+.SH ENVIRONMENT
+.B xz
+parses space-separated lists of options
+from the environment variables
+.B XZ_DEFAULTS
+and
+.BR XZ_OPT ,
+in this order, before parsing the options from the command line.
+Note that only options are parsed from the environment variables;
+all non-options are silently ignored.
+Parsing is done with
+.BR getopt_long (3)
+which is used also for the command line arguments.
+.TP
+.B XZ_DEFAULTS
+User-specific or system-wide default options.
+Typically this is set in a shell initialization script to enable
+.BR xz 's
+memory usage limiter by default.
+Excluding shell initialization scripts
+and similar special cases, scripts must never set or unset
+.BR XZ_DEFAULTS .
+.TP
+.B XZ_OPT
+This is for passing options to
+.B xz
+when it is not possible to set the options directly on the
+.B xz
+command line.
+This is the case when
+.B xz
+is run by a script or tool, for example, GNU
+.BR tar (1):
+.RS
+.RS
+.PP
+.nf
+.ft CW
+XZ_OPT=\-2v tar caf foo.tar.xz foo
+.ft R
+.fi
+.RE
+.RE
+.IP ""
+Scripts may use
+.BR XZ_OPT ,
+for example, to set script-specific default compression options.
+It is still recommended to allow users to override
+.B XZ_OPT
+if that is reasonable.
+For example, in
+.BR sh (1)
+scripts one may use something like this:
+.RS
+.RS
+.PP
+.nf
+.ft CW
+XZ_OPT=${XZ_OPT\-"\-7e"}
+export XZ_OPT
+.ft R
+.fi
+.RE
+.RE
+.
+.SH "LZMA UTILS COMPATIBILITY"
+The command line syntax of
+.B xz
+is practically a superset of
+.BR lzma ,
+.BR unlzma ,
+and
+.B lzcat
+as found from LZMA Utils 4.32.x.
+In most cases, it is possible to replace
+LZMA Utils with XZ Utils without breaking existing scripts.
+There are some incompatibilities though,
+which may sometimes cause problems.
+.
+.SS "Compression preset levels"
+The numbering of the compression level presets is not identical in
+.B xz
+and LZMA Utils.
+The most important difference is how dictionary sizes
+are mapped to different presets.
+Dictionary size is roughly equal to the decompressor memory usage.
+.RS
+.PP
+.TS
+tab(;);
+c c c
+c n n.
+Level;xz;LZMA Utils
+\-0;256 KiB;N/A
+\-1;1 MiB;64 KiB
+\-2;2 MiB;1 MiB
+\-3;4 MiB;512 KiB
+\-4;4 MiB;1 MiB
+\-5;8 MiB;2 MiB
+\-6;8 MiB;4 MiB
+\-7;16 MiB;8 MiB
+\-8;32 MiB;16 MiB
+\-9;64 MiB;32 MiB
+.TE
+.RE
+.PP
+The dictionary size differences affect
+the compressor memory usage too,
+but there are some other differences between
+LZMA Utils and XZ Utils, which
+make the difference even bigger:
+.RS
+.PP
+.TS
+tab(;);
+c c c
+c n n.
+Level;xz;LZMA Utils 4.32.x
+\-0;3 MiB;N/A
+\-1;9 MiB;2 MiB
+\-2;17 MiB;12 MiB
+\-3;32 MiB;12 MiB
+\-4;48 MiB;16 MiB
+\-5;94 MiB;26 MiB
+\-6;94 MiB;45 MiB
+\-7;186 MiB;83 MiB
+\-8;370 MiB;159 MiB
+\-9;674 MiB;311 MiB
+.TE
+.RE
+.PP
+The default preset level in LZMA Utils is
+.B \-7
+while in XZ Utils it is
+.BR \-6 ,
+so both use an 8 MiB dictionary by default.
+.
+.SS "Streamed vs. non-streamed .lzma files"
+The uncompressed size of the file can be stored in the
+.B .lzma
+header.
+LZMA Utils does that when compressing regular files.
+The alternative is to mark that uncompressed size is unknown
+and use end-of-payload marker to indicate
+where the decompressor should stop.
+LZMA Utils uses this method when uncompressed size isn't known,
+which is the case, for example, in pipes.
+.PP
+.B xz
+supports decompressing
+.B .lzma
+files with or without end-of-payload marker, but all
+.B .lzma
+files created by
+.B xz
+will use end-of-payload marker and have uncompressed size
+marked as unknown in the
+.B .lzma
+header.
+This may be a problem in some uncommon situations.
+For example, a
+.B .lzma
+decompressor in an embedded device might work
+only with files that have known uncompressed size.
+If you hit this problem, you need to use LZMA Utils
+or LZMA SDK to create
+.B .lzma
+files with known uncompressed size.
+.
+.SS "Unsupported .lzma files"
+The
+.B .lzma
+format allows
+.I lc
+values up to 8, and
+.I lp
+values up to 4.
+LZMA Utils can decompress files with any
+.I lc
+and
+.IR lp ,
+but always creates files with
+.B lc=3
+and
+.BR lp=0 .
+Creating files with other
+.I lc
+and
+.I lp
+is possible with
+.B xz
+and with LZMA SDK.
+.PP
+The implementation of the LZMA1 filter in liblzma
+requires that the sum of
+.I lc
+and
+.I lp
+must not exceed 4.
+Thus,
+.B .lzma
+files, which exceed this limitation, cannot be decompressed with
+.BR xz .
+.PP
+LZMA Utils creates only
+.B .lzma
+files which have a dictionary size of
+.RI "2^" n
+(a power of 2) but accepts files with any dictionary size.
+liblzma accepts only
+.B .lzma
+files which have a dictionary size of
+.RI "2^" n
+or
+.RI "2^" n " + 2^(" n "\-1)."
+This is to decrease false positives when detecting
+.B .lzma
+files.
+.PP
+These limitations shouldn't be a problem in practice,
+since practically all
+.B .lzma
+files have been compressed with settings that liblzma will accept.
+.
+.SS "Trailing garbage"
+When decompressing,
+LZMA Utils silently ignore everything after the first
+.B .lzma
+stream.
+In most situations, this is a bug.
+This also means that LZMA Utils
+don't support decompressing concatenated
+.B .lzma
+files.
+.PP
+If there is data left after the first
+.B .lzma
+stream,
+.B xz
+considers the file to be corrupt unless
+.B \-\-single\-stream
+was used.
+This may break obscure scripts which have
+assumed that trailing garbage is ignored.
+.
+.SH NOTES
+.
+.SS "Compressed output may vary"
+The exact compressed output produced from
+the same uncompressed input file
+may vary between XZ Utils versions even if
+compression options are identical.
+This is because the encoder can be improved
+(faster or better compression)
+without affecting the file format.
+The output can vary even between different
+builds of the same XZ Utils version,
+if different build options are used.
+.PP
+The above means that once
+.B \-\-rsyncable
+has been implemented,
+the resulting files won't necessarily be rsyncable
+unless both old and new files have been compressed
+with the same xz version.
+This problem can be fixed if a part of the encoder
+implementation is frozen to keep rsyncable output
+stable across xz versions.
+.
+.SS "Embedded .xz decompressors"
+Embedded
+.B .xz
+decompressor implementations like XZ Embedded don't necessarily
+support files created with integrity
+.I check
+types other than
+.B none
+and
+.BR crc32 .
+Since the default is
+.BR \-\-check=crc64 ,
+you must use
+.B \-\-check=none
+or
+.B \-\-check=crc32
+when creating files for embedded systems.
+.PP
+Outside embedded systems, all
+.B .xz
+format decompressors support all the
+.I check
+types, or at least are able to decompress
+the file without verifying the
+integrity check if the particular
+.I check
+is not supported.
+.PP
+XZ Embedded supports BCJ filters,
+but only with the default start offset.
+.
+.SH EXAMPLES
+.
+.SS Basics
+Compress the file
+.I foo
+into
+.I foo.xz
+using the default compression level
+.RB ( \-6 ),
+and remove
+.I foo
+if compression is successful:
+.RS
+.PP
+.nf
+.ft CW
+xz foo
+.ft R
+.fi
+.RE
+.PP
+Decompress
+.I bar.xz
+into
+.I bar
+and don't remove
+.I bar.xz
+even if decompression is successful:
+.RS
+.PP
+.nf
+.ft CW
+xz \-dk bar.xz
+.ft R
+.fi
+.RE
+.PP
+Create
+.I baz.tar.xz
+with the preset
+.B \-4e
+.RB ( "\-4 \-\-extreme" ),
+which is slower than the default
+.BR \-6 ,
+but needs less memory for compression and decompression (48\ MiB
+and 5\ MiB, respectively):
+.RS
+.PP
+.nf
+.ft CW
+tar cf \- baz | xz \-4e > baz.tar.xz
+.ft R
+.fi
+.RE
+.PP
+A mix of compressed and uncompressed files can be decompressed
+to standard output with a single command:
+.RS
+.PP
+.nf
+.ft CW
+xz \-dcf a.txt b.txt.xz c.txt d.txt.lzma > abcd.txt
+.ft R
+.fi
+.RE
+.
+.SS "Parallel compression of many files"
+On GNU and *BSD,
+.BR find (1)
+and
+.BR xargs (1)
+can be used to parallelize compression of many files:
+.RS
+.PP
+.nf
+.ft CW
+find . \-type f \e! \-name '*.xz' \-print0 \e
+ | xargs \-0r \-P4 \-n16 xz \-T1
+.ft R
+.fi
+.RE
+.PP
+The
+.B \-P
+option to
+.BR xargs (1)
+sets the number of parallel
+.B xz
+processes.
+The best value for the
+.B \-n
+option depends on how many files there are to be compressed.
+If there are only a couple of files,
+the value should probably be 1;
+with tens of thousands of files,
+100 or even more may be appropriate to reduce the number of
+.B xz
+processes that
+.BR xargs (1)
+will eventually create.
+.PP
+The option
+.B \-T1
+for
+.B xz
+is there to force it to single-threaded mode, because
+.BR xargs (1)
+is used to control the amount of parallelization.
+.
+.SS "Robot mode"
+Calculate how many bytes have been saved in total
+after compressing multiple files:
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-robot \-\-list *.xz | awk '/^totals/{print $5\-$4}'
+.ft R
+.fi
+.RE
+.PP
+A script may want to know that it is using new enough
+.BR xz .
+The following
+.BR sh (1)
+script checks that the version number of the
+.B xz
+tool is at least 5.0.0.
+This method is compatible with old beta versions,
+which didn't support the
+.B \-\-robot
+option:
+.RS
+.PP
+.nf
+.ft CW
+if ! eval "$(xz \-\-robot \-\-version 2> /dev/null)" ||
+ [ "$XZ_VERSION" \-lt 50000002 ]; then
+ echo "Your xz is too old."
+fi
+unset XZ_VERSION LIBLZMA_VERSION
+.ft R
+.fi
+.RE
+.PP
+Set a memory usage limit for decompression using
+.BR XZ_OPT ,
+but if a limit has already been set, don't increase it:
+.RS
+.PP
+.nf
+.ft CW
+NEWLIM=$((123 << 20))\ \ # 123 MiB
+OLDLIM=$(xz \-\-robot \-\-info\-memory | cut \-f3)
+if [ $OLDLIM \-eq 0 \-o $OLDLIM \-gt $NEWLIM ]; then
+ XZ_OPT="$XZ_OPT \-\-memlimit\-decompress=$NEWLIM"
+ export XZ_OPT
+fi
+.ft R
+.fi
+.RE
+.
+.SS "Custom compressor filter chains"
+The simplest use for custom filter chains is
+customizing a LZMA2 preset.
+This can be useful,
+because the presets cover only a subset of the
+potentially useful combinations of compression settings.
+.PP
+The CompCPU columns of the tables
+from the descriptions of the options
+.BR "\-0" " ... " "\-9"
+and
+.B \-\-extreme
+are useful when customizing LZMA2 presets.
+Here are the relevant parts collected from those two tables:
+.RS
+.PP
+.TS
+tab(;);
+c c
+n n.
+Preset;CompCPU
+\-0;0
+\-1;1
+\-2;2
+\-3;3
+\-4;4
+\-5;5
+\-6;6
+\-5e;7
+\-6e;8
+.TE
+.RE
+.PP
+If you know that a file requires
+somewhat big dictionary (for example, 32\ MiB) to compress well,
+but you want to compress it quicker than
+.B "xz \-8"
+would do, a preset with a low CompCPU value (for example, 1)
+can be modified to use a bigger dictionary:
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-lzma2=preset=1,dict=32MiB foo.tar
+.ft R
+.fi
+.RE
+.PP
+With certain files, the above command may be faster than
+.B "xz \-6"
+while compressing significantly better.
+However, it must be emphasized that only some files benefit from
+a big dictionary while keeping the CompCPU value low.
+The most obvious situation,
+where a big dictionary can help a lot,
+is an archive containing very similar files
+of at least a few megabytes each.
+The dictionary size has to be significantly bigger
+than any individual file to allow LZMA2 to take
+full advantage of the similarities between consecutive files.
+.PP
+If very high compressor and decompressor memory usage is fine,
+and the file being compressed is
+at least several hundred megabytes, it may be useful
+to use an even bigger dictionary than the 64 MiB that
+.B "xz \-9"
+would use:
+.RS
+.PP
+.nf
+.ft CW
+xz \-vv \-\-lzma2=dict=192MiB big_foo.tar
+.ft R
+.fi
+.RE
+.PP
+Using
+.B \-vv
+.RB ( "\-\-verbose \-\-verbose" )
+like in the above example can be useful
+to see the memory requirements
+of the compressor and decompressor.
+Remember that using a dictionary bigger than
+the size of the uncompressed file is waste of memory,
+so the above command isn't useful for small files.
+.PP
+Sometimes the compression time doesn't matter,
+but the decompressor memory usage has to be kept low, for example,
+to make it possible to decompress the file on an embedded system.
+The following command uses
+.B \-6e
+.RB ( "\-6 \-\-extreme" )
+as a base and sets the dictionary to only 64\ KiB.
+The resulting file can be decompressed with XZ Embedded
+(that's why there is
+.BR \-\-check=crc32 )
+using about 100\ KiB of memory.
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-check=crc32 \-\-lzma2=preset=6e,dict=64KiB foo
+.ft R
+.fi
+.RE
+.PP
+If you want to squeeze out as many bytes as possible,
+adjusting the number of literal context bits
+.RI ( lc )
+and number of position bits
+.RI ( pb )
+can sometimes help.
+Adjusting the number of literal position bits
+.RI ( lp )
+might help too, but usually
+.I lc
+and
+.I pb
+are more important.
+For example, a source code archive contains mostly US-ASCII text,
+so something like the following might give
+slightly (like 0.1\ %) smaller file than
+.B "xz \-6e"
+(try also without
+.BR lc=4 ):
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-lzma2=preset=6e,pb=0,lc=4 source_code.tar
+.ft R
+.fi
+.RE
+.PP
+Using another filter together with LZMA2 can improve
+compression with certain file types.
+For example, to compress a x86-32 or x86-64 shared library
+using the x86 BCJ filter:
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-x86 \-\-lzma2 libfoo.so
+.ft R
+.fi
+.RE
+.PP
+Note that the order of the filter options is significant.
+If
+.B \-\-x86
+is specified after
+.BR \-\-lzma2 ,
+.B xz
+will give an error,
+because there cannot be any filter after LZMA2,
+and also because the x86 BCJ filter cannot be used
+as the last filter in the chain.
+.PP
+The Delta filter together with LZMA2
+can give good results with bitmap images.
+It should usually beat PNG,
+which has a few more advanced filters than simple
+delta but uses Deflate for the actual compression.
+.PP
+The image has to be saved in uncompressed format,
+for example, as uncompressed TIFF.
+The distance parameter of the Delta filter is set
+to match the number of bytes per pixel in the image.
+For example, 24-bit RGB bitmap needs
+.BR dist=3 ,
+and it is also good to pass
+.B pb=0
+to LZMA2 to accommodate the three-byte alignment:
+.RS
+.PP
+.nf
+.ft CW
+xz \-\-delta=dist=3 \-\-lzma2=pb=0 foo.tiff
+.ft R
+.fi
+.RE
+.PP
+If multiple images have been put into a single archive (for example,
+.BR .tar ),
+the Delta filter will work on that too as long as all images
+have the same number of bytes per pixel.
+.
+.SH "SEE ALSO"
+.BR xzdec (1),
+.BR xzdiff (1),
+.BR xzgrep (1),
+.BR xzless (1),
+.BR xzmore (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR 7z (1)
+.PP
+XZ Utils: <https://tukaani.org/xz/>
+.br
+XZ Embedded: <https://tukaani.org/xz/embedded.html>
+.br
+LZMA SDK: <https://7-zip.org/sdk.html>
diff --git a/src/xz/xz_w32res.rc b/src/xz/xz_w32res.rc
new file mode 100644
index 0000000..bad3020
--- /dev/null
+++ b/src/xz/xz_w32res.rc
@@ -0,0 +1,12 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#define MY_TYPE VFT_APP
+#define MY_NAME "xz"
+#define MY_SUFFIX ".exe"
+#define MY_DESC "xz data compression tool for .xz and .lzma files"
+#include "common_w32res.rc"
diff --git a/src/xzdec/Makefile.am b/src/xzdec/Makefile.am
new file mode 100644
index 0000000..90f1e92
--- /dev/null
+++ b/src/xzdec/Makefile.am
@@ -0,0 +1,111 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+# Windows resource compiler support. It's fine to use xz_CPPFLAGS
+# also for lzmadec.
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(xzdec_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
+
+
+xzdec_SOURCES = \
+ xzdec.c \
+ ../common/tuklib_progname.c \
+ ../common/tuklib_exit.c
+
+if COND_W32
+xzdec_SOURCES += xzdec_w32res.rc
+endif
+
+xzdec_CPPFLAGS = \
+ -DTUKLIB_GETTEXT=0 \
+ -I$(top_srcdir)/src/common \
+ -I$(top_srcdir)/src/liblzma/api \
+ -I$(top_builddir)/lib
+xzdec_LDADD = $(top_builddir)/src/liblzma/liblzma.la
+
+if COND_GNULIB
+xzdec_LDADD += $(top_builddir)/lib/libgnu.a
+endif
+
+xzdec_LDADD += $(LTLIBINTL)
+
+
+lzmadec_SOURCES = \
+ xzdec.c \
+ ../common/tuklib_progname.c \
+ ../common/tuklib_exit.c
+
+if COND_W32
+lzmadec_SOURCES += lzmadec_w32res.rc
+endif
+
+lzmadec_CPPFLAGS = $(xzdec_CPPFLAGS) -DLZMADEC
+lzmadec_LDFLAGS = $(xzdec_LDFLAGS)
+lzmadec_LDADD = $(xzdec_LDADD)
+
+
+bin_PROGRAMS =
+lzmadecmanlink =
+
+if COND_XZDEC
+bin_PROGRAMS += xzdec
+dist_man_MANS = xzdec.1
+endif
+
+if COND_LZMADEC
+bin_PROGRAMS += lzmadec
+
+# Create the symlink lzmadec.1->xzdec.1 only if xzdec.1 was installed.
+# This is better than creating a dangling symlink. The correct solution
+# would be to install xzdec.1 as lzmadec.1 but this code is already too
+# complicated so I won't do it. Installing only lzmadec is a bit unusual
+# situation anyway so it's not that important.
+if COND_XZDEC
+lzmadecmanlink += lzmadec
+endif
+endif
+
+if COND_XZDEC
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+install-data-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ target=`echo xzdec | sed '$(transform)'` && \
+ link=`echo lzmadec | sed '$(transform)'` && \
+ for lang in . $$languages; do \
+ man="$(top_srcdir)/po4a/man/$$lang/xzdec.1" ; \
+ if test -f "$$man"; then \
+ $(MAKE) dist_man_MANS="$$man" man_MANS= \
+ mandir="$(mandir)/$$lang" install-man; \
+ fi; \
+ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+ if test -f "$$man1dir/$$target.1"; then \
+ if test -n "$(lzmadecmanlink)"; then ( \
+ cd "$$man1dir" && \
+ rm -f "$$link.1" && \
+ $(LN_S) "$$target.1" "$$link.1" \
+ ); fi; \
+ fi; \
+ done
+
+uninstall-hook:
+ languages= ; \
+ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+ languages=`ls "$(top_srcdir)/po4a/man"`; \
+ fi; \
+ for lang in . $$languages; do \
+ for name in xzdec $(lzmadecmanlink); do \
+ name=`echo $$name | sed '$(transform)'` && \
+ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$name.1"; \
+ done; \
+ done
+endif
diff --git a/src/xzdec/Makefile.in b/src/xzdec/Makefile.in
new file mode 100644
index 0000000..b05cff1
--- /dev/null
+++ b/src/xzdec/Makefile.in
@@ -0,0 +1,969 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+ if test -z '$(MAKELEVEL)'; then \
+ false; \
+ elif test -n '$(MAKE_HOST)'; then \
+ true; \
+ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+ true; \
+ else \
+ false; \
+ fi; \
+}
+am__make_running_with_option = \
+ case $${target_option-} in \
+ ?) ;; \
+ *) echo "am__make_running_with_option: internal error: invalid" \
+ "target option '$${target_option-}' specified" >&2; \
+ exit 1;; \
+ esac; \
+ has_opt=no; \
+ sane_makeflags=$$MAKEFLAGS; \
+ if $(am__is_gnu_make); then \
+ sane_makeflags=$$MFLAGS; \
+ else \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ bs=\\; \
+ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \
+ esac; \
+ fi; \
+ skip_next=no; \
+ strip_trailopt () \
+ { \
+ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+ }; \
+ for flg in $$sane_makeflags; do \
+ test $$skip_next = yes && { skip_next=no; continue; }; \
+ case $$flg in \
+ *=*|--*) continue;; \
+ -*I) strip_trailopt 'I'; skip_next=yes;; \
+ -*I?*) strip_trailopt 'I';; \
+ -*O) strip_trailopt 'O'; skip_next=yes;; \
+ -*O?*) strip_trailopt 'O';; \
+ -*l) strip_trailopt 'l'; skip_next=yes;; \
+ -*l?*) strip_trailopt 'l';; \
+ -[dEDm]) skip_next=yes;; \
+ -[JT]) skip_next=yes;; \
+ esac; \
+ case $$flg in \
+ *$$target_option*) has_opt=yes; break;; \
+ esac; \
+ done; \
+ test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+@COND_W32_TRUE@am__append_1 = xzdec_w32res.rc
+@COND_GNULIB_TRUE@am__append_2 = $(top_builddir)/lib/libgnu.a
+@COND_W32_TRUE@am__append_3 = lzmadec_w32res.rc
+bin_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
+@COND_XZDEC_TRUE@am__append_4 = xzdec
+@COND_LZMADEC_TRUE@am__append_5 = lzmadec
+
+# Create the symlink lzmadec.1->xzdec.1 only if xzdec.1 was installed.
+# This is better than creating a dangling symlink. The correct solution
+# would be to install xzdec.1 as lzmadec.1 but this code is already too
+# complicated so I won't do it. Installing only lzmadec is a bit unusual
+# situation anyway so it's not that important.
+@COND_LZMADEC_TRUE@@COND_XZDEC_TRUE@am__append_6 = lzmadec
+subdir = src/xzdec
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+ @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+ if test -z '$(STRIP)'; then \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ install; \
+ else \
+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+ "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+ fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
+@COND_XZDEC_FALSE@install-data-hook:
+@COND_XZDEC_FALSE@uninstall-hook:
+clean: clean-am
+
+clean-am: clean-binPROGRAMS clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+ -rm -f ./$(DEPDIR)/lzmadec-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/lzmadec-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/lzmadec-xzdec.Po
+ -rm -f ./$(DEPDIR)/xzdec-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/xzdec-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/xzdec-xzdec.Po
+ -rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+ distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) install-data-hook
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-binPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man1
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+ -rm -f ./$(DEPDIR)/lzmadec-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/lzmadec-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/lzmadec-xzdec.Po
+ -rm -f ./$(DEPDIR)/xzdec-tuklib_exit.Po
+ -rm -f ./$(DEPDIR)/xzdec-tuklib_progname.Po
+ -rm -f ./$(DEPDIR)/xzdec-xzdec.Po
+ -rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-binPROGRAMS uninstall-man
+ @$(NORMAL_INSTALL)
+ $(MAKE) $(AM_MAKEFLAGS) uninstall-hook
+uninstall-man: uninstall-man1
+
+.MAKE: install-am install-data-am install-strip uninstall-am
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+ clean-binPROGRAMS clean-generic clean-libtool cscopelist-am \
+ ctags ctags-am distclean distclean-compile distclean-generic \
+ distclean-libtool distclean-tags distdir dvi dvi-am html \
+ html-am info info-am install install-am install-binPROGRAMS \
+ install-data install-data-am install-data-hook install-dvi \
+ install-dvi-am install-exec install-exec-am install-html \
+ install-html-am install-info install-info-am install-man \
+ install-man1 install-pdf install-pdf-am install-ps \
+ install-ps-am install-strip installcheck installcheck-am \
+ installdirs maintainer-clean maintainer-clean-generic \
+ mostlyclean mostlyclean-compile mostlyclean-generic \
+ mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+ uninstall-am uninstall-binPROGRAMS uninstall-hook \
+ uninstall-man uninstall-man1
+
+.PRECIOUS: Makefile
+
+
+# Windows resource compiler support. It's fine to use xz_CPPFLAGS
+# also for lzmadec.
+.rc.o:
+ $(RC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(xzdec_CPPFLAGS) $(CPPFLAGS) $(RCFLAGS) -i $< -o $@
+
+# The installation of translated man pages abuses Automake internals
+# by calling "install-man" with redefined dist_man_MANS and man_MANS.
+# If this breaks some day, don't blame Automake developers.
+@COND_XZDEC_TRUE@install-data-hook:
+@COND_XZDEC_TRUE@ languages= ; \
+@COND_XZDEC_TRUE@ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+@COND_XZDEC_TRUE@ languages=`ls "$(top_srcdir)/po4a/man"`; \
+@COND_XZDEC_TRUE@ fi; \
+@COND_XZDEC_TRUE@ target=`echo xzdec | sed '$(transform)'` && \
+@COND_XZDEC_TRUE@ link=`echo lzmadec | sed '$(transform)'` && \
+@COND_XZDEC_TRUE@ for lang in . $$languages; do \
+@COND_XZDEC_TRUE@ man="$(top_srcdir)/po4a/man/$$lang/xzdec.1" ; \
+@COND_XZDEC_TRUE@ if test -f "$$man"; then \
+@COND_XZDEC_TRUE@ $(MAKE) dist_man_MANS="$$man" man_MANS= \
+@COND_XZDEC_TRUE@ mandir="$(mandir)/$$lang" install-man; \
+@COND_XZDEC_TRUE@ fi; \
+@COND_XZDEC_TRUE@ man1dir="$(DESTDIR)$(mandir)/$$lang/man1" && \
+@COND_XZDEC_TRUE@ if test -f "$$man1dir/$$target.1"; then \
+@COND_XZDEC_TRUE@ if test -n "$(lzmadecmanlink)"; then ( \
+@COND_XZDEC_TRUE@ cd "$$man1dir" && \
+@COND_XZDEC_TRUE@ rm -f "$$link.1" && \
+@COND_XZDEC_TRUE@ $(LN_S) "$$target.1" "$$link.1" \
+@COND_XZDEC_TRUE@ ); fi; \
+@COND_XZDEC_TRUE@ fi; \
+@COND_XZDEC_TRUE@ done
+
+@COND_XZDEC_TRUE@uninstall-hook:
+@COND_XZDEC_TRUE@ languages= ; \
+@COND_XZDEC_TRUE@ if test "$(USE_NLS)" = yes && test -d "$(top_srcdir)/po4a/man"; then \
+@COND_XZDEC_TRUE@ languages=`ls "$(top_srcdir)/po4a/man"`; \
+@COND_XZDEC_TRUE@ fi; \
+@COND_XZDEC_TRUE@ for lang in . $$languages; do \
+@COND_XZDEC_TRUE@ for name in xzdec $(lzmadecmanlink); do \
+@COND_XZDEC_TRUE@ name=`echo $$name | sed '$(transform)'` && \
+@COND_XZDEC_TRUE@ rm -f "$(DESTDIR)$(mandir)/$$lang/man1/$$name.1"; \
+@COND_XZDEC_TRUE@ done; \
+@COND_XZDEC_TRUE@ done
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/xzdec/lzmadec_w32res.rc b/src/xzdec/lzmadec_w32res.rc
new file mode 100644
index 0000000..b85962d
--- /dev/null
+++ b/src/xzdec/lzmadec_w32res.rc
@@ -0,0 +1,12 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#define MY_TYPE VFT_APP
+#define MY_NAME "lzmadec"
+#define MY_SUFFIX ".exe"
+#define MY_DESC "lzmadec decompression tool for .lzma files"
+#include "common_w32res.rc"
diff --git a/src/xzdec/xzdec.1 b/src/xzdec/xzdec.1
new file mode 100644
index 0000000..78bc9b4
--- /dev/null
+++ b/src/xzdec/xzdec.1
@@ -0,0 +1,146 @@
+.\"
+.\" Author: Lasse Collin
+.\"
+.\" This file has been put into the public domain.
+.\" You can do whatever you want with this file.
+.\"
+.TH XZDEC 1 "2017-04-19" "Tukaani" "XZ Utils"
+.SH NAME
+xzdec, lzmadec \- Small .xz and .lzma decompressors
+.SH SYNOPSIS
+.B xzdec
+.RI [ option... ]
+.RI [ file... ]
+.br
+.B lzmadec
+.RI [ option... ]
+.RI [ file... ]
+.SH DESCRIPTION
+.B xzdec
+is a liblzma-based decompression-only tool for
+.B .xz
+(and only
+.BR .xz )
+files.
+.B xzdec
+is intended to work as a drop-in replacement for
+.BR xz (1)
+in the most common situations where a script
+has been written to use
+.B "xz \-\-decompress \-\-stdout"
+(and possibly a few other commonly used options) to decompress
+.B .xz
+files.
+.B lzmadec
+is identical to
+.B xzdec
+except that
+.B lzmadec
+supports
+.B .lzma
+files instead of
+.B .xz
+files.
+.PP
+To reduce the size of the executable,
+.B xzdec
+doesn't support multithreading or localization,
+and doesn't read options from
+.B XZ_DEFAULTS
+and
+.B XZ_OPT
+environment variables.
+.B xzdec
+doesn't support displaying intermediate progress information: sending
+.B SIGINFO
+to
+.B xzdec
+does nothing, but sending
+.B SIGUSR1
+terminates the process instead of displaying progress information.
+.SH OPTIONS
+.TP
+.BR \-d ", " \-\-decompress ", " \-\-uncompress
+Ignored for
+.BR xz (1)
+compatibility.
+.B xzdec
+supports only decompression.
+.TP
+.BR \-k ", " \-\-keep
+Ignored for
+.BR xz (1)
+compatibility.
+.B xzdec
+never creates or removes any files.
+.TP
+.BR \-c ", " \-\-stdout ", " \-\-to-stdout
+Ignored for
+.BR xz (1)
+compatibility.
+.B xzdec
+always writes the decompressed data to standard output.
+.TP
+.BR \-q ", " \-\-quiet
+Specifying this once does nothing since
+.B xzdec
+never displays any warnings or notices.
+Specify this twice to suppress errors.
+.TP
+.BR \-Q ", " \-\-no-warn
+Ignored for
+.BR xz (1)
+compatibility.
+.B xzdec
+never uses the exit status 2.
+.TP
+.BR \-h ", " \-\-help
+Display a help message and exit successfully.
+.TP
+.BR \-V ", " \-\-version
+Display the version number of
+.B xzdec
+and liblzma.
+.SH "EXIT STATUS"
+.TP
+.B 0
+All was good.
+.TP
+.B 1
+An error occurred.
+.PP
+.B xzdec
+doesn't have any warning messages like
+.BR xz (1)
+has, thus the exit status 2 is not used by
+.BR xzdec .
+.SH NOTES
+Use
+.BR xz (1)
+instead of
+.B xzdec
+or
+.B lzmadec
+for normal everyday use.
+.B xzdec
+or
+.B lzmadec
+are meant only for situations where it is important to have
+a smaller decompressor than the full-featured
+.BR xz (1).
+.PP
+.B xzdec
+and
+.B lzmadec
+are not really that small.
+The size can be reduced further by dropping
+features from liblzma at compile time,
+but that shouldn't usually be done for executables distributed
+in typical non-embedded operating system distributions.
+If you need a truly small
+.B .xz
+decompressor, consider using XZ Embedded.
+.SH "SEE ALSO"
+.BR xz (1)
+.PP
+XZ Embedded: <https://tukaani.org/xz/embedded.html>
diff --git a/src/xzdec/xzdec.c b/src/xzdec/xzdec.c
new file mode 100644
index 0000000..556c548
--- /dev/null
+++ b/src/xzdec/xzdec.c
@@ -0,0 +1,326 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file xzdec.c
+/// \brief Simple single-threaded tool to uncompress .xz or .lzma files
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include "lzma.h"
+
+#include <stdarg.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "getopt.h"
+#include "tuklib_progname.h"
+#include "tuklib_exit.h"
+
+#ifdef TUKLIB_DOSLIKE
+# include <fcntl.h>
+# include <io.h>
+#endif
+
+
+#ifdef LZMADEC
+# define TOOL_FORMAT "lzma"
+#else
+# define TOOL_FORMAT "xz"
+#endif
+
+
+/// Error messages are suppressed if this is zero, which is the case when
+/// --quiet has been given at least twice.
+static int display_errors = 2;
+
+
+lzma_attribute((__format__(__printf__, 1, 2)))
+static void
+my_errorf(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+
+ if (display_errors) {
+ fprintf(stderr, "%s: ", progname);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ }
+
+ va_end(ap);
+ return;
+}
+
+
+tuklib_attr_noreturn
+static void
+help(void)
+{
+ printf(
+"Usage: %s [OPTION]... [FILE]...\n"
+"Decompress files in the ." TOOL_FORMAT " format to standard output.\n"
+"\n"
+" -d, --decompress (ignored, only decompression is supported)\n"
+" -k, --keep (ignored, files are never deleted)\n"
+" -c, --stdout (ignored, output is always written to standard output)\n"
+" -q, --quiet specify *twice* to suppress errors\n"
+" -Q, --no-warn (ignored, the exit status 2 is never used)\n"
+" -h, --help display this help and exit\n"
+" -V, --version display the version number and exit\n"
+"\n"
+"With no FILE, or when FILE is -, read standard input.\n"
+"\n"
+"Report bugs to <" PACKAGE_BUGREPORT "> (in English or Finnish).\n"
+PACKAGE_NAME " home page: <" PACKAGE_URL ">\n", progname);
+
+ tuklib_exit(EXIT_SUCCESS, EXIT_FAILURE, display_errors);
+}
+
+
+tuklib_attr_noreturn
+static void
+version(void)
+{
+ printf(TOOL_FORMAT "dec (" PACKAGE_NAME ") " LZMA_VERSION_STRING "\n"
+ "liblzma %s\n", lzma_version_string());
+
+ tuklib_exit(EXIT_SUCCESS, EXIT_FAILURE, display_errors);
+}
+
+
+/// Parses command line options.
+static void
+parse_options(int argc, char **argv)
+{
+ static const char short_opts[] = "cdkM:hqQV";
+ static const struct option long_opts[] = {
+ { "stdout", no_argument, NULL, 'c' },
+ { "to-stdout", no_argument, NULL, 'c' },
+ { "decompress", no_argument, NULL, 'd' },
+ { "uncompress", no_argument, NULL, 'd' },
+ { "keep", no_argument, NULL, 'k' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "no-warn", no_argument, NULL, 'Q' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL))
+ != -1) {
+ switch (c) {
+ case 'c':
+ case 'd':
+ case 'k':
+ case 'Q':
+ break;
+
+ case 'q':
+ if (display_errors > 0)
+ --display_errors;
+
+ break;
+
+ case 'h':
+ help();
+
+ case 'V':
+ version();
+
+ default:
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ return;
+}
+
+
+static void
+uncompress(lzma_stream *strm, FILE *file, const char *filename)
+{
+ lzma_ret ret;
+
+ // Initialize the decoder
+#ifdef LZMADEC
+ ret = lzma_alone_decoder(strm, UINT64_MAX);
+#else
+ ret = lzma_stream_decoder(strm, UINT64_MAX, LZMA_CONCATENATED);
+#endif
+
+ // The only reasonable error here is LZMA_MEM_ERROR.
+ if (ret != LZMA_OK) {
+ my_errorf("%s", ret == LZMA_MEM_ERROR ? strerror(ENOMEM)
+ : "Internal error (bug)");
+ exit(EXIT_FAILURE);
+ }
+
+ // Input and output buffers
+ uint8_t in_buf[BUFSIZ];
+ uint8_t out_buf[BUFSIZ];
+
+ strm->avail_in = 0;
+ strm->next_out = out_buf;
+ strm->avail_out = BUFSIZ;
+
+ lzma_action action = LZMA_RUN;
+
+ while (true) {
+ if (strm->avail_in == 0) {
+ strm->next_in = in_buf;
+ strm->avail_in = fread(in_buf, 1, BUFSIZ, file);
+
+ if (ferror(file)) {
+ // POSIX says that fread() sets errno if
+ // an error occurred. ferror() doesn't
+ // touch errno.
+ my_errorf("%s: Error reading input file: %s",
+ filename, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+#ifndef LZMADEC
+ // When using LZMA_CONCATENATED, we need to tell
+ // liblzma when it has got all the input.
+ if (feof(file))
+ action = LZMA_FINISH;
+#endif
+ }
+
+ ret = lzma_code(strm, action);
+
+ // Write and check write error before checking decoder error.
+ // This way as much data as possible gets written to output
+ // even if decoder detected an error.
+ if (strm->avail_out == 0 || ret != LZMA_OK) {
+ const size_t write_size = BUFSIZ - strm->avail_out;
+
+ if (fwrite(out_buf, 1, write_size, stdout)
+ != write_size) {
+ // Wouldn't be a surprise if writing to stderr
+ // would fail too but at least try to show an
+ // error message.
+ my_errorf("Cannot write to standard output: "
+ "%s", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ strm->next_out = out_buf;
+ strm->avail_out = BUFSIZ;
+ }
+
+ if (ret != LZMA_OK) {
+ if (ret == LZMA_STREAM_END) {
+#ifdef LZMADEC
+ // Check that there's no trailing garbage.
+ if (strm->avail_in != 0
+ || fread(in_buf, 1, 1, file)
+ != 0
+ || !feof(file))
+ ret = LZMA_DATA_ERROR;
+ else
+ return;
+#else
+ // lzma_stream_decoder() already guarantees
+ // that there's no trailing garbage.
+ assert(strm->avail_in == 0);
+ assert(action == LZMA_FINISH);
+ assert(feof(file));
+ return;
+#endif
+ }
+
+ const char *msg;
+ switch (ret) {
+ case LZMA_MEM_ERROR:
+ msg = strerror(ENOMEM);
+ break;
+
+ case LZMA_FORMAT_ERROR:
+ msg = "File format not recognized";
+ break;
+
+ case LZMA_OPTIONS_ERROR:
+ // FIXME: Better message?
+ msg = "Unsupported compression options";
+ break;
+
+ case LZMA_DATA_ERROR:
+ msg = "File is corrupt";
+ break;
+
+ case LZMA_BUF_ERROR:
+ msg = "Unexpected end of input";
+ break;
+
+ default:
+ msg = "Internal error (bug)";
+ break;
+ }
+
+ my_errorf("%s: %s", filename, msg);
+ exit(EXIT_FAILURE);
+ }
+ }
+}
+
+
+int
+main(int argc, char **argv)
+{
+ // Initialize progname which we will be used in error messages.
+ tuklib_progname_init(argv);
+
+ // Parse the command line options.
+ parse_options(argc, argv);
+
+ // The same lzma_stream is used for all files that we decode. This way
+ // we don't need to reallocate memory for every file if they use same
+ // compression settings.
+ lzma_stream strm = LZMA_STREAM_INIT;
+
+ // Some systems require setting stdin and stdout to binary mode.
+#ifdef TUKLIB_DOSLIKE
+ setmode(fileno(stdin), O_BINARY);
+ setmode(fileno(stdout), O_BINARY);
+#endif
+
+ if (optind == argc) {
+ // No filenames given, decode from stdin.
+ uncompress(&strm, stdin, "(stdin)");
+ } else {
+ // Loop through the filenames given on the command line.
+ do {
+ // "-" indicates stdin.
+ if (strcmp(argv[optind], "-") == 0) {
+ uncompress(&strm, stdin, "(stdin)");
+ } else {
+ FILE *file = fopen(argv[optind], "rb");
+ if (file == NULL) {
+ my_errorf("%s: %s", argv[optind],
+ strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ uncompress(&strm, file, argv[optind]);
+ fclose(file);
+ }
+ } while (++optind < argc);
+ }
+
+#ifndef NDEBUG
+ // Free the memory only when debugging. Freeing wastes some time,
+ // but allows detecting possible memory leaks with Valgrind.
+ lzma_end(&strm);
+#endif
+
+ tuklib_exit(EXIT_SUCCESS, EXIT_FAILURE, display_errors);
+}
diff --git a/src/xzdec/xzdec_w32res.rc b/src/xzdec/xzdec_w32res.rc
new file mode 100644
index 0000000..0e26a22
--- /dev/null
+++ b/src/xzdec/xzdec_w32res.rc
@@ -0,0 +1,12 @@
+/*
+ * Author: Lasse Collin
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+#define MY_TYPE VFT_APP
+#define MY_NAME "xzdec"
+#define MY_SUFFIX ".exe"
+#define MY_DESC "xzdec decompression tool for .xz files"
+#include "common_w32res.rc"