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authorDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 13:37:46 +0000
committerDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 13:37:46 +0000
commite46f7f8dc39b450ee59872552e833d7e00b5a014 (patch)
treea3531971aecdcbcc2a0680091ae23b4df48b6c6b
parentAdding upstream version 0.7. (diff)
downloadlzlib-e46f7f8dc39b450ee59872552e833d7e00b5a014.tar.xz
lzlib-e46f7f8dc39b450ee59872552e833d7e00b5a014.zip
Adding upstream version 0.8.upstream/0.8
Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
-rw-r--r--COPYING1352
-rw-r--r--ChangeLog24
-rw-r--r--INSTALL2
-rw-r--r--Makefile.in54
-rw-r--r--NEWS29
-rw-r--r--README2
-rw-r--r--arg_parser.cc20
-rw-r--r--arg_parser.h20
-rwxr-xr-xconfigure49
-rw-r--r--decoder.cc58
-rw-r--r--decoder.h10
-rw-r--r--doc/lzlib.info341
-rw-r--r--doc/lzlib.texinfo284
-rw-r--r--encoder.cc9
-rw-r--r--encoder.h11
-rw-r--r--lzcheck.cc98
-rw-r--r--lzip.h20
-rw-r--r--lzlib.cc345
-rw-r--r--lzlib.h117
-rw-r--r--main.cc219
-rwxr-xr-xtestsuite/check.sh10
-rw-r--r--testsuite/test1676
-rw-r--r--testsuite/test1.lz (renamed from testsuite/COPYING.lz)bin11540 -> 11540 bytes
23 files changed, 2512 insertions, 1238 deletions
diff --git a/COPYING b/COPYING
index 5b244d5..4432540 100644
--- a/COPYING
+++ b/COPYING
@@ -1,676 +1,676 @@
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- If the Program specifies that a proxy can decide which future
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- Later license versions may give you additional or different
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-author or copyright holder as a result of your choosing to follow a
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- THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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- How to Apply These Terms to Your New Programs
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- If you develop a new program, and you want it to be of the greatest
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- To do so, attach the following notices to the program. It is safest
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-
- <one line to give the program's name and a brief idea of what it does.>
- Copyright (C) <year> <name of author>
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- This program is free software: you can redistribute it and/or modify
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- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
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- 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
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-
-Also add information on how to contact you by electronic and paper mail.
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- If the program does terminal interaction, make it output a short
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-
- <program> Copyright (C) <year> <name of author>
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
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-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
- You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
- The GNU General Public License does not permit incorporating your program
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-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
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-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
-
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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 3 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
diff --git a/ChangeLog b/ChangeLog
index 7849896..af535cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,23 @@
+2010-01-17 Antonio Diaz Diaz <ant_diaz@teleline.es>
+
+ * Version 0.8 released.
+ * Added new function LZ_decompress_reset.
+ * Added new function LZ_decompress_sync_to_member.
+ * Added new function LZ_decompress_write_size.
+ * Added new function LZ_strerror.
+ * lzlib.h: API change. Replaced "enum" with functions for values
+ of dictionary size limits to make interface names consistent.
+ * lzlib.h: API change. "LZ_errno" replaced with "LZ_Errno".
+ * lzlib.h: API change. Replaced "void *" with "struct LZ_Encoder *"
+ and "struct LZ_Decoder *" to make interface type safe.
+ * decoder.cc: Truncated member trailer is now correctly detected.
+ * encoder.cc: Matchfinder::reset now also clears at_stream_end_,
+ allowing LZ_compress_restart_member to restart a finished stream.
+ * lzlib.cc: Accept only query or close operations after a fatal
+ error has occurred.
+ * Shared version of lzlib is no more built by default.
+ * testsuite/check.sh: Use "test1" instead of "COPYING" for testing.
+
2009-10-20 Antonio Diaz Diaz <ant_diaz@teleline.es>
* Version 0.7 released.
@@ -27,7 +47,7 @@
2009-05-03 Antonio Diaz Diaz <ant_diaz@teleline.es>
* Version 0.3 released.
- * Lzilib is now built as a shared library (in addition to static).
+ * Lzlib is now built as a shared library (in addition to static).
2009-04-26 Antonio Diaz Diaz <ant_diaz@teleline.es>
@@ -40,7 +60,7 @@
* Version 0.1 released.
-Copyright (C) 2009 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This file is a collection of facts, and thus it is not copyrightable,
but just in case, I give you unlimited permission to copy, distribute
diff --git a/INSTALL b/INSTALL
index e1d20f6..f99968a 100644
--- a/INSTALL
+++ b/INSTALL
@@ -51,7 +51,7 @@ After running `configure', you can run `make' and `make install' as
explained above.
-Copyright (C) 2009 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This file is free documentation: you have unlimited permission to copy,
distribute and modify it.
diff --git a/Makefile.in b/Makefile.in
index 3d51c30..c06404d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -19,23 +19,23 @@ objs = arg_parser.o main.o
all : $(progname) $(progname_shared)
-$(libname).a: $(lib_objs)
- $(AR) -rcs $(libname).a $(lib_objs)
+lib$(libname).a: $(lib_objs)
+ $(AR) -rcs lib$(libname).a $(lib_objs)
-$(libname).so.$(pkgversion) : $(sh_lib_objs)
- $(CXX) -shared -Wl,--soname=$(libname).so.$(soversion) -o $(libname).so.$(pkgversion) $(sh_lib_objs)
+lib$(libname).so.$(pkgversion) : $(sh_lib_objs)
+ $(CXX) -shared -Wl,--soname=lib$(libname).so.$(soversion) -o lib$(libname).so.$(pkgversion) $(sh_lib_objs)
-$(progname) : $(objs) $(libname).a
- $(CXX) $(LDFLAGS) -o $(progname) $(objs) $(libname).a
+$(progname) : $(objs) lib$(libname).a
+ $(CXX) $(LDFLAGS) -o $(progname) $(objs) lib$(libname).a
-$(progname)_shared : $(objs) $(libname).so.$(pkgversion)
- $(CXX) $(LDFLAGS) -o $(progname)_shared $(objs) $(libname).so.$(pkgversion)
+$(progname)_shared : $(objs) lib$(libname).so.$(pkgversion)
+ $(CXX) $(LDFLAGS) -o $(progname)_shared $(objs) lib$(libname).so.$(pkgversion)
-$(progname)_profiled : $(objs) $(libname).a
- $(CXX) $(LDFLAGS) -pg -o $(progname)_profiled $(objs) $(libname).a
+$(progname)_profiled : $(objs) lib$(libname).a
+ $(CXX) $(LDFLAGS) -pg -o $(progname)_profiled $(objs) lib$(libname).a
-lzcheck : lzcheck.o $(libname).a
- $(CXX) $(LDFLAGS) -o lzcheck lzcheck.o $(libname).a
+lzcheck : lzcheck.o lib$(libname).a
+ $(CXX) $(LDFLAGS) -o lzcheck lzcheck.o lib$(libname).a
main.o : main.cc
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -DPROGVERSION=\"$(pkgversion)\" -c -o $@ $<
@@ -61,7 +61,8 @@ sh_decoder.o : decoder.h
sh_encoder.o : encoder.h
sh_lzlib.o : decoder.h encoder.h
arg_parser.o : Makefile arg_parser.h
-main.o : Makefile arg_parser.h lzlib.h $(libname).a
+main.o : Makefile arg_parser.h lzlib.h
+lzcheck.o : Makefile lzlib.h
doc : info man
@@ -80,21 +81,21 @@ $(VPATH)/doc/$(progname).1 : $(progname)
Makefile : $(VPATH)/configure $(VPATH)/Makefile.in
./config.status
-check : all $(VPATH)/testsuite/check.sh lzcheck
+check : all lzcheck
@$(VPATH)/testsuite/check.sh $(VPATH)/testsuite
install : all install-info
if [ ! -d $(DESTDIR)$(includedir) ] ; then $(INSTALL_DIR) $(DESTDIR)$(includedir) ; fi
if [ ! -d $(DESTDIR)$(libdir) ] ; then $(INSTALL_DIR) $(DESTDIR)$(libdir) ; fi
- $(INSTALL_DATA) $(VPATH)/$(pkgname).h $(DESTDIR)$(includedir)/$(pkgname).h
- $(INSTALL_DATA) ./$(libname).a $(DESTDIR)$(libdir)/$(libname).a
+ $(INSTALL_DATA) $(VPATH)/$(libname)lib.h $(DESTDIR)$(includedir)/$(libname)lib.h
+ $(INSTALL_DATA) ./lib$(libname).a $(DESTDIR)$(libdir)/lib$(libname).a
if [ -n "$(progname_shared)" ] ; then \
- $(INSTALL_PROGRAM) ./$(libname).so.$(pkgversion) $(DESTDIR)$(libdir)/$(libname).so.$(pkgversion) ; \
- if [ -e $(DESTDIR)$(libdir)/$(libname).so.$(soversion) ] ; then \
- run_ldconfig=no ; rm -f $(DESTDIR)$(libdir)/$(libname).so.$(soversion) ; \
+ $(INSTALL_PROGRAM) ./lib$(libname).so.$(pkgversion) $(DESTDIR)$(libdir)/lib$(libname).so.$(pkgversion) ; \
+ if [ -e $(DESTDIR)$(libdir)/lib$(libname).so.$(soversion) ] ; then \
+ run_ldconfig=no ; rm -f $(DESTDIR)$(libdir)/lib$(libname).so.$(soversion) ; \
else run_ldconfig=yes ; \
fi ; \
- cd $(DESTDIR)$(libdir) && ln -s $(libname).so.$(pkgversion) $(libname).so.$(soversion) ; \
+ cd $(DESTDIR)$(libdir) && ln -s lib$(libname).so.$(pkgversion) lib$(libname).so.$(soversion) ; \
if [ $${run_ldconfig} = yes ] ; then $(LDCONFIG) $(DESTDIR)$(libdir) ; fi ; \
fi
@@ -111,10 +112,10 @@ install-strip : all
$(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install
uninstall : uninstall-info
- -rm -f $(DESTDIR)$(includedir)/$(pkgname).h
- -rm -f $(DESTDIR)$(libdir)/$(libname).a
- -rm -f $(DESTDIR)$(libdir)/$(libname).so.$(soversion)
- -rm -f $(DESTDIR)$(libdir)/$(libname).so.$(pkgversion)
+ -rm -f $(DESTDIR)$(includedir)/$(libname)lib.h
+ -rm -f $(DESTDIR)$(libdir)/lib$(libname).a
+ -rm -f $(DESTDIR)$(libdir)/lib$(libname).so.$(soversion)
+ -rm -f $(DESTDIR)$(libdir)/lib$(libname).so.$(pkgversion)
uninstall-info :
-install-info --info-dir=$(DESTDIR)$(infodir) --remove $(DESTDIR)$(infodir)/$(pkgname).info
@@ -123,7 +124,7 @@ uninstall-info :
uninstall-man :
-rm -f $(DESTDIR)$(mandir)/man1/$(progname).1
-dist :
+dist : doc
ln -sf $(VPATH) $(DISTNAME)
tar -cvf $(DISTNAME).tar \
$(DISTNAME)/AUTHORS \
@@ -136,8 +137,9 @@ dist :
$(DISTNAME)/configure \
$(DISTNAME)/doc/$(pkgname).info \
$(DISTNAME)/doc/$(pkgname).texinfo \
- $(DISTNAME)/testsuite/COPYING.lz \
$(DISTNAME)/testsuite/check.sh \
+ $(DISTNAME)/testsuite/test1 \
+ $(DISTNAME)/testsuite/test1.lz \
$(DISTNAME)/*.h \
$(DISTNAME)/*.cc
rm -f $(DISTNAME)
diff --git a/NEWS b/NEWS
index 3b1cc6e..e380e9d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,28 @@
-Changes in version 0.7:
+Changes in version 0.8:
-Compression time has been reduced by 4%.
+API changes:
+ New functions:
+ LZ_decompress_reset
+ LZ_decompress_sync_to_member
+ LZ_decompress_write_size
+ LZ_strerror
+
+ Names and types for values of dictionary size limits have been changed
+ to make interface names consistent.
+
+ "LZ_errno" has been replaced with "LZ_Errno".
+
+ "void *" has been replaced with "struct LZ_Encoder *" and
+ "struct LZ_Decoder *" to make interface type safe.
+
+A truncated member trailer is now correctly detected.
+
+LZ_compress_restart_member is now able to restart a finished stream.
+
+Lzlib now only accepts query or close operations after a fatal error has
+occurred.
+
+Shared version of lzlib is no more built by default. Use
+"configure --enable-shared" to build it.
+
+The "COPYING" file is no more used for testing decompression.
diff --git a/README b/README
index dabf521..ea8f363 100644
--- a/README
+++ b/README
@@ -29,7 +29,7 @@ Igor Pavlov. For a description of the LZMA algorithm, see the Lzip
manual.
-Copyright (C) 2009 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This file is free documentation: you have unlimited permission to copy,
distribute and modify it.
diff --git a/arg_parser.cc b/arg_parser.cc
index b889e1a..cc9f87d 100644
--- a/arg_parser.cc
+++ b/arg_parser.cc
@@ -1,18 +1,28 @@
-/* Arg_parser - A POSIX/GNU command line argument parser.
- Copyright (C) 2006, 2007, 2008, 2009 Antonio Diaz Diaz.
+/* Arg_parser - A POSIX/GNU command line argument parser. (C++ version)
+ Copyright (C) 2006, 2007, 2008, 2009, 2010 Antonio Diaz Diaz.
- This program is free software: you can redistribute it and/or modify
+ This library 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 3 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ This library 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.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+ As a special exception, you may use this file as part of a free
+ software library without restriction. Specifically, if other files
+ instantiate templates or use macros or inline functions from this
+ file, or you compile this file and link it with other files to
+ produce an executable, this file does not by itself cause the
+ resulting executable to be covered by the GNU General Public
+ License. This exception does not however invalidate any other
+ reasons why the executable file might be covered by the GNU General
+ Public License.
*/
#include <cstring>
diff --git a/arg_parser.h b/arg_parser.h
index fa6161b..da1cc94 100644
--- a/arg_parser.h
+++ b/arg_parser.h
@@ -1,18 +1,28 @@
-/* Arg_parser - A POSIX/GNU command line argument parser.
- Copyright (C) 2006, 2007, 2008, 2009 Antonio Diaz Diaz.
+/* Arg_parser - A POSIX/GNU command line argument parser. (C++ version)
+ Copyright (C) 2006, 2007, 2008, 2009, 2010 Antonio Diaz Diaz.
- This program is free software: you can redistribute it and/or modify
+ This library 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 3 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ This library 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.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+ As a special exception, you may use this file as part of a free
+ software library without restriction. Specifically, if other files
+ instantiate templates or use macros or inline functions from this
+ file, or you compile this file and link it with other files to
+ produce an executable, this file does not by itself cause the
+ resulting executable to be covered by the GNU General Public
+ License. This exception does not however invalidate any other
+ reasons why the executable file might be covered by the GNU General
+ Public License.
*/
/* Arg_parser reads the arguments in `argv' and creates a number of
diff --git a/configure b/configure
index f0815e8..5c06975 100755
--- a/configure
+++ b/configure
@@ -1,21 +1,21 @@
#! /bin/sh
# configure script for Lzlib - A compression library for lzip files
-# Copyright (C) 2009 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010 Antonio Diaz Diaz.
#
# This configure script is free software: you have unlimited permission
# to copy, distribute and modify it.
#
-# Date of this version: 2009-10-20
+# Date of this version: 2010-01-17
args=
no_create=
pkgname=lzlib
-pkgversion=0.7
+pkgversion=0.8
soversion=0
progname=minilzip
-progname_shared=${progname}_shared
-libname=liblz
-srctrigger=${pkgname}.h
+progname_shared=
+libname=lz
+srctrigger=${libname}lib.h
# clear some things potentially inherited from environment.
LC_ALL=C
@@ -30,15 +30,13 @@ infodir='$(datadir)/info'
libdir='${exec_prefix}/lib'
mandir='$(datadir)/man'
sysconfdir='$(prefix)/etc'
-CC=
CXX=
CPPFLAGS=
-CFLAGS='-Wall -W -O2'
CXXFLAGS='-Wall -W -O2'
LDFLAGS=
# Loop over all args
-while [ x"$1" != x ] ; do
+while [ -n "$1" ] ; do
# Get the first arg, and shuffle
option=$1
@@ -70,11 +68,9 @@ while [ x"$1" != x ] ; do
echo " --libdir=DIR object code libraries [${libdir}]"
echo " --mandir=DIR man pages directory [${mandir}]"
echo " --sysconfdir=DIR read-only single-machine data directory [${sysconfdir}]"
- echo " --disable-shared do not build a shared library [enable]"
- echo " CC=COMPILER C compiler to use [gcc]"
+ echo " --enable-shared build also a shared library [disable]"
echo " CXX=COMPILER C++ compiler to use [g++]"
echo " CPPFLAGS=OPTIONS command line options for the preprocessor [${CPPFLAGS}]"
- echo " CFLAGS=OPTIONS command line options for the C compiler [${CFLAGS}]"
echo " CXXFLAGS=OPTIONS command line options for the C++ compiler [${CXXFLAGS}]"
echo " LDFLAGS=OPTIONS command line options for the linker [${LDFLAGS}]"
echo
@@ -104,13 +100,11 @@ while [ x"$1" != x ] ; do
sysconfdir=`echo ${optarg} | sed -e 's,/$,,'` ;;
--no-create | --no-c*)
no_create=yes ;;
- --disable-shared | --disable-s*)
- progname_shared= ;;
+ --enable-shared | --enable-s*)
+ progname_shared=${progname}_shared ;;
- CC=*) CC=${optarg} ;;
CXX=*) CXX=${optarg} ;;
CPPFLAGS=*) CPPFLAGS=${optarg} ;;
- CFLAGS=*) CFLAGS=${optarg} ;;
CXXFLAGS=*) CXXFLAGS=${optarg} ;;
LDFLAGS=*) LDFLAGS=${optarg} ;;
@@ -123,7 +117,7 @@ done
# Find the source files, if location was not specified.
srcdirtext=
-if [ x"${srcdir}" = x ] ; then
+if [ -z "${srcdir}" ] ; then
srcdirtext="or . or .." ; srcdir=.
if [ ! -r ${srcdir}/${srctrigger} ] ; then srcdir=.. ; fi
if [ ! -r ${srcdir}/${srctrigger} ] ; then
@@ -143,19 +137,8 @@ fi
# Set srcdir to . if that's what it is.
if [ "`pwd`" = "`cd ${srcdir} ; pwd`" ] ; then srcdir=. ; fi
-# checking whether we are using GNU C.
-if [ x"${CC}" = x ] ; then # Let the user override the test.
- if [ -x /bin/gcc ] ||
- [ -x /usr/bin/gcc ] ||
- [ -x /usr/local/bin/gcc ] ; then
- CC="gcc"
- else
- CC="cc"
- fi
-fi
-
# checking whether we are using GNU C++.
-if [ x"${CXX}" = x ] ; then # Let the user override the test.
+if [ -z "${CXX}" ] ; then # Let the user override the test.
if [ -x /bin/g++ ] ||
[ -x /usr/bin/g++ ] ||
[ -x /usr/local/bin/g++ ] ; then
@@ -166,7 +149,7 @@ if [ x"${CXX}" = x ] ; then # Let the user override the test.
fi
echo
-if [ x${no_create} = x ] ; then
+if [ -z ${no_create} ] ; then
echo "creating config.status"
rm -f config.status
cat > config.status << EOF
@@ -193,16 +176,14 @@ echo "infodir = ${infodir}"
echo "libdir = ${libdir}"
echo "mandir = ${mandir}"
echo "sysconfdir = ${sysconfdir}"
-echo "CC = ${CC}"
echo "CXX = ${CXX}"
echo "CPPFLAGS = ${CPPFLAGS}"
-echo "CFLAGS = ${CFLAGS}"
echo "CXXFLAGS = ${CXXFLAGS}"
echo "LDFLAGS = ${LDFLAGS}"
rm -f Makefile
cat > Makefile << EOF
# Makefile for Lzlib - A compression library for lzip files
-# Copyright (C) 2009 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010 Antonio Diaz Diaz.
# This file was generated automatically by configure. Do not edit.
#
# This Makefile is free software: you have unlimited permission
@@ -224,10 +205,8 @@ infodir = ${infodir}
libdir = ${libdir}
mandir = ${mandir}
sysconfdir = ${sysconfdir}
-CC = ${CC}
CXX = ${CXX}
CPPFLAGS = ${CPPFLAGS}
-CFLAGS = ${CFLAGS}
CXXFLAGS = ${CXXFLAGS}
LDFLAGS = ${LDFLAGS}
EOF
diff --git a/decoder.cc b/decoder.cc
index 5f44309..2577230 100644
--- a/decoder.cc
+++ b/decoder.cc
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -31,8 +31,6 @@
#include <cerrno>
#include <cstdlib>
#include <cstring>
-#include <string>
-#include <vector>
#include <stdint.h>
#include "lzlib.h"
@@ -42,7 +40,8 @@
const CRC32 crc32;
-
+// Copies up to `out_size' bytes to `out_buffer' and updates `get'.
+// Returns the number of bytes copied.
int Circular_buffer::read_data( uint8_t * const out_buffer, const int out_size ) throw()
{
int size = 0;
@@ -70,6 +69,8 @@ int Circular_buffer::read_data( uint8_t * const out_buffer, const int out_size )
}
+// Copies up to `in_size' bytes from `in_buffer' and updates `put'.
+// Returns the number of bytes copied.
int Circular_buffer::write_data( const uint8_t * const in_buffer, const int in_size ) throw()
{
int size = 0;
@@ -97,6 +98,47 @@ int Circular_buffer::write_data( const uint8_t * const in_buffer, const int in_s
}
+// Seeks a member header and updates `get'.
+// Returns true if it finds a valid header.
+bool Input_buffer::find_header() throw()
+ {
+ while( get != put )
+ {
+ if( buffer[get] == magic_string[0] )
+ {
+ int g = get;
+ File_header header;
+ for( unsigned int i = 0; i < sizeof header; ++i )
+ {
+ if( g == put ) return false; // not enough data
+ ((uint8_t *)&header)[i] = buffer[g];
+ if( ++g >= buffer_size ) g = 0;
+ }
+ if( header.verify() ) return true;
+ }
+ if( ++get >= buffer_size ) get = 0;
+ }
+ return false;
+ }
+
+
+// Returns true, fills `header', and updates `get' if `get' points to a
+// valid header.
+// Else returns false and leaves `get' unmodified.
+bool Input_buffer::read_header( File_header & header ) throw()
+ {
+ int g = get;
+ for( unsigned int i = 0; i < sizeof header; ++i )
+ {
+ if( g == put ) return false; // not enough data
+ ((uint8_t *)&header)[i] = buffer[g];
+ if( ++g >= buffer_size ) g = 0;
+ }
+ if( header.verify() ) { get = g; return true; }
+ return false;
+ }
+
+
bool LZ_decoder::verify_trailer()
{
bool error = false;
@@ -125,7 +167,8 @@ int LZ_decoder::decode_member()
if( !range_decoder.try_reload() ) return 0;
if( verify_trailer_pending )
{
- if( range_decoder.available_bytes() < File_trailer::size( format_version ) )
+ if( range_decoder.available_bytes() < File_trailer::size( format_version ) &&
+ !range_decoder.at_stream_end() )
return 0;
verify_trailer_pending = false;
member_finished_ = true;
@@ -201,7 +244,8 @@ int LZ_decoder::decode_member()
range_decoder.normalize();
if( len == min_match_len ) // End Of Stream marker
{
- if( range_decoder.available_bytes() < File_trailer::size( format_version ) )
+ if( range_decoder.available_bytes() < File_trailer::size( format_version ) &&
+ !range_decoder.at_stream_end() )
{ verify_trailer_pending = true; return 0; }
member_finished_ = true;
if( verify_trailer() ) return 0; else return 3;
diff --git a/decoder.h b/decoder.h
index e95a85e..e7775b0 100644
--- a/decoder.h
+++ b/decoder.h
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -39,7 +39,13 @@ public:
bool at_stream_end() const throw() { return at_stream_end_; }
void finish() throw() { at_stream_end_ = true; }
bool finished() const throw() { return at_stream_end_ && !used_bytes(); }
+ int free_bytes() const throw()
+ { if( at_stream_end_ ) return 0; return Circular_buffer::free_bytes(); }
void purge() throw() { at_stream_end_ = true; Circular_buffer::reset(); }
+ void reset() throw() { at_stream_end_ = false; Circular_buffer::reset(); }
+
+ bool find_header() throw();
+ bool read_header( File_header & header ) throw();
bool enough_available_bytes() const throw()
{
diff --git a/doc/lzlib.info b/doc/lzlib.info
index 40862bd..9437d8c 100644
--- a/doc/lzlib.info
+++ b/doc/lzlib.info
@@ -12,23 +12,25 @@ File: lzlib.info, Node: Top, Next: Introduction, Up: (dir)
Lzlib Manual
************
-This manual is for Lzlib (version 0.7, 20 October 2009).
+This manual is for Lzlib (version 0.8, 17 January 2010).
* Menu:
* Introduction:: Purpose and features of Lzlib
* Library Version:: Checking library version
* Buffering:: Sizes of Lzlib's buffers
+* Parameter Limits:: Min / max values for some parameters
* Compression Functions:: Descriptions of the compression functions
* Decompression Functions:: Descriptions of the decompression functions
* Error Codes:: Meaning of codes returned by functions
+* Error Messages:: Error messages corresponding to error codes
* Data Format:: Detailed format of the compressed data
* Examples:: A small tutorial with examples
* Problems:: Reporting bugs
* Concept Index:: Index of concepts
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This manual is free documentation: you have unlimited permission to
copy, distribute and modify it.
@@ -95,7 +97,7 @@ application.
error( "bad library version" );

-File: lzlib.info, Node: Buffering, Next: Compression Functions, Prev: Library Version, Up: Top
+File: lzlib.info, Node: Buffering, Next: Parameter Limits, Prev: Library Version, Up: Top
3 Buffering
***********
@@ -119,24 +121,55 @@ minimum sizes:
`LZ_decompress_write' function. Its size is 64KiB.
* Output decompression buffer. Read from by the `LZ_decompress_read'
- function. Its size is the dictionary size set with the
- `LZ_decompress_open' function or 64KiB, whichever is larger.
+ function. Its size is the dictionary size set in the header of the
+ member currently being decompressed or 64KiB, whichever is larger.

-File: lzlib.info, Node: Compression Functions, Next: Decompression Functions, Prev: Buffering, Up: Top
+File: lzlib.info, Node: Parameter Limits, Next: Compression Functions, Prev: Buffering, Up: Top
-4 Compression Functions
+4 Parameter Limits
+******************
+
+These functions provide minimum and maximum values for some parameters.
+Current values are shown in square brackets.
+
+ -- Function: int LZ_min_dictionary_bits ( void )
+ Returns the base 2 logarithm of the smallest valid dictionary size
+ [12].
+
+ -- Function: int LZ_min_dictionary_size ( void )
+ Returns the smallest valid dictionary size [4KiB].
+
+ -- Function: int LZ_max_dictionary_bits ( void )
+ Returns the base 2 logarithm of the largest valid dictionary size
+ [29].
+
+ -- Function: int LZ_max_dictionary_size ( void )
+ Returns the largest valid dictionary size [512MiB].
+
+ -- Function: int LZ_min_match_len_limit ( void )
+ Returns the smallest valid match length limit [5].
+
+ -- Function: int LZ_max_match_len_limit ( void )
+ Returns the largest valid match length limit [273].
+
+
+File: lzlib.info, Node: Compression Functions, Next: Decompression Functions, Prev: Parameter Limits, Up: Top
+
+5 Compression Functions
***********************
These are the functions used to compress data. In case of error, all of
them return -1, except `LZ_compress_open' whose return value must be
verified by calling `LZ_compress_errno' before using it.
- -- Function: void * LZ_compress_open ( const int DICTIONARY_SIZE,
- const int MATCH_LEN_LIMIT, const long long MEMBER_SIZE )
+ -- Function: struct LZ_Encoder * LZ_compress_open ( const int
+ DICTIONARY_SIZE, const int MATCH_LEN_LIMIT, const long long
+ MEMBER_SIZE )
Initializes the internal stream state for compression and returns a
pointer that can only be used as the ENCODER argument for the
- other LZ_compress functions.
+ other LZ_compress functions, or a null pointer if the encoder
+ could not be allocated.
The returned pointer must be verified by calling
`LZ_compress_errno' before using it. If `LZ_compress_errno' does
@@ -158,31 +191,37 @@ verified by calling `LZ_compress_errno' before using it.
stream, give MEMBER_SIZE a value larger than the amount of data to
be produced, for example LLONG_MAX.
- -- Function: int LZ_compress_restart_member ( void * const ENCODER,
- const long long MEMBER_SIZE )
- Use this function to start a new member, in a multimember data
- stream. Call this function only after
- `LZ_compress_member_finished' indicates that the current member
- has been fully read (with the `LZ_compress_read' function).
-
- -- Function: int LZ_compress_close ( void * const ENCODER )
+ -- Function: int LZ_compress_close ( struct LZ_Encoder * const ENCODER
+ )
Frees all dynamically allocated data structures for this stream.
This function discards any unprocessed input and does not flush
any pending output. After a call to `LZ_compress_close', ENCODER
can no more be used as an argument to any LZ_compress function.
- -- Function: int LZ_compress_finish ( void * const ENCODER )
- Use this function to tell `lzlib' that all the data for this stream
+ -- Function: int LZ_compress_finish ( struct LZ_Encoder * const
+ ENCODER )
+ Use this function to tell `lzlib' that all the data for this member
has already been written (with the `LZ_compress_write' function).
+ After all the produced compressed data has been read with
+ `LZ_compress_read' and `LZ_compress_member_finished' returns 1, a
+ new member can be started with `LZ_compress_restart_member'.
+
+ -- Function: int LZ_compress_restart_member ( struct LZ_Encoder *
+ const ENCODER, const long long MEMBER_SIZE )
+ Use this function to start a new member, in a multimember data
+ stream. Call this function only after
+ `LZ_compress_member_finished' indicates that the current member
+ has been fully read (with the `LZ_compress_read' function).
- -- Function: int LZ_compress_sync_flush ( void * const ENCODER )
+ -- Function: int LZ_compress_sync_flush ( struct LZ_Encoder * const
+ ENCODER )
Use this function to make available to `LZ_compress_read' all the
data already written with the `LZ_compress_write' function.
Repeated use of `LZ_compress_sync_flush' may degrade compression
ratio, so use it only when needed.
- -- Function: int LZ_compress_read ( void * const ENCODER, uint8_t *
- const BUFFER, const int SIZE )
+ -- Function: int LZ_compress_read ( struct LZ_Encoder * const ENCODER,
+ uint8_t * const BUFFER, const int SIZE )
The `LZ_compress_read' function reads up to SIZE bytes from the
stream pointed to by ENCODER, storing the results in BUFFER.
@@ -192,8 +231,8 @@ verified by calling `LZ_compress_errno' before using it.
`LZ_compress_write' function. Note that reading less than SIZE
bytes is not an error.
- -- Function: int LZ_compress_write ( void * const ENCODER, uint8_t *
- const BUFFER, const int SIZE )
+ -- Function: int LZ_compress_write ( struct LZ_Encoder * const
+ ENCODER, uint8_t * const BUFFER, const int SIZE )
The `LZ_compress_write' function writes up to SIZE bytes from
BUFFER to the stream pointed to by ENCODER.
@@ -201,7 +240,8 @@ verified by calling `LZ_compress_errno' before using it.
might be less than SIZE. Note that writing less than SIZE bytes is
not an error.
- -- Function: int LZ_compress_write_size ( void * const ENCODER )
+ -- Function: int LZ_compress_write_size ( struct LZ_Encoder * const
+ ENCODER )
The `LZ_compress_write_size' function returns the maximum number of
bytes that can be inmediately written through the
`LZ_compress_write' function.
@@ -209,69 +249,94 @@ verified by calling `LZ_compress_errno' before using it.
It is guaranteed that an inmediate call to `LZ_compress_write' will
accept a SIZE up to the returned number of bytes.
- -- Function: enum LZ_errno LZ_compress_errno ( void * const ENCODER )
+ -- Function: enum LZ_Errno LZ_compress_errno ( struct LZ_Encoder *
+ const ENCODER )
Returns the current error code for ENCODER (*note Error Codes::)
- -- Function: int LZ_compress_finished ( void * const ENCODER )
+ -- Function: int LZ_compress_finished ( struct LZ_Encoder * const
+ ENCODER )
Returns 1 if all the data has been read and `LZ_compress_close' can
be safely called. Otherwise it returns 0.
- -- Function: int LZ_compress_member_finished ( void * const ENCODER )
+ -- Function: int LZ_compress_member_finished ( struct LZ_Encoder *
+ const ENCODER )
Returns 1 if the current member, in a multimember data stream, has
been fully read and `LZ_compress_restart_member' can be safely
called. Otherwise it returns 0.
- -- Function: long long LZ_compress_data_position ( void * const
- ENCODER )
+ -- Function: long long LZ_compress_data_position ( struct LZ_Encoder *
+ const ENCODER )
Returns the number of input bytes already compressed in the current
member.
- -- Function: long long LZ_compress_member_position ( void * const
- ENCODER )
+ -- Function: long long LZ_compress_member_position ( struct LZ_Encoder
+ * const ENCODER )
Returns the number of compressed bytes already produced, but
perhaps not yet read, in the current member.
- -- Function: long long LZ_compress_total_in_size ( void * const
- ENCODER )
+ -- Function: long long LZ_compress_total_in_size ( struct LZ_Encoder *
+ const ENCODER )
Returns the total number of input bytes already compressed.
- -- Function: long long LZ_compress_total_out_size ( void * const
- ENCODER )
+ -- Function: long long LZ_compress_total_out_size ( struct LZ_Encoder
+ * const ENCODER )
Returns the total number of compressed bytes already produced, but
perhaps not yet read.

File: lzlib.info, Node: Decompression Functions, Next: Error Codes, Prev: Compression Functions, Up: Top
-5 Decompression Functions
+6 Decompression Functions
*************************
These are the functions used to decompress data. In case of error, all
of them return -1, except `LZ_decompress_open' whose return value must
be verified by calling `LZ_decompress_errno' before using it.
- -- Function: void * LZ_decompress_open ( void )
+ -- Function: struct LZ_Decoder * LZ_decompress_open ( void )
Initializes the internal stream state for decompression and
returns a pointer that can only be used as the DECODER argument
- for the other LZ_decompress functions.
+ for the other LZ_decompress functions, or a null pointer if the
+ decoder could not be allocated.
The returned pointer must be verified by calling
`LZ_decompress_errno' before using it. If `LZ_decompress_errno'
does not return `LZ_ok', the returned pointer must not be used and
should be freed with `LZ_decompress_close' to avoid memory leaks.
- -- Function: int LZ_decompress_close ( void * const DECODER )
+ -- Function: int LZ_decompress_close ( struct LZ_Decoder * const
+ DECODER )
Frees all dynamically allocated data structures for this stream.
This function discards any unprocessed input and does not flush
any pending output. After a call to `LZ_decompress_close', DECODER
can no more be used as an argument to any LZ_decompress function.
- -- Function: int LZ_decompress_finish ( void * const DECODER )
+ -- Function: int LZ_decompress_finish ( struct LZ_Decoder * const
+ DECODER )
Use this function to tell `lzlib' that all the data for this stream
has already been written (with the `LZ_decompress_write' function).
- -- Function: int LZ_decompress_read ( void * const DECODER, uint8_t *
- const BUFFER, const int SIZE )
+ -- Function: int LZ_decompress_reset ( struct LZ_Decoder * const
+ DECODER )
+ Resets the internal state of DECODER as it was just after opening
+ it with the `LZ_decompress_open' function. Data stored in the
+ internal buffers is discarded. Position counters are set to 0.
+
+ -- Function: int LZ_decompress_sync_to_member ( struct LZ_Decoder *
+ const DECODER )
+ Resets the error state of DECODER and enters a search state that
+ lasts until a new member header (or the end of the stream) is
+ found. After a successful call to `LZ_decompress_sync_to_member',
+ data written with `LZ_decompress_write' will be consumed and
+ `LZ_decompress_read' will return 0 until a header is found.
+
+ This function is useful to discard any data preceding the first
+ member, or to discard the rest of the current member, for example
+ in case of a data error. If the decoder is already at the
+ beginning of a member, this function does nothing.
+
+ -- Function: int LZ_decompress_read ( struct LZ_Decoder * const
+ DECODER, uint8_t * const BUFFER, const int SIZE )
The `LZ_decompress_read' function reads up to SIZE bytes from the
stream pointed to by DECODER, storing the results in BUFFER.
@@ -281,8 +346,8 @@ be verified by calling `LZ_decompress_errno' before using it.
`LZ_decompress_write' function. Note that reading less than SIZE
bytes is not an error.
- -- Function: int LZ_decompress_write ( void * const DECODER, uint8_t *
- const BUFFER, const int SIZE )
+ -- Function: int LZ_decompress_write ( struct LZ_Decoder * const
+ DECODER, uint8_t * const BUFFER, const int SIZE )
The `LZ_decompress_write' function writes up to SIZE bytes from
BUFFER to the stream pointed to by DECODER.
@@ -290,36 +355,47 @@ be verified by calling `LZ_decompress_errno' before using it.
might be less than SIZE. Note that writing less than SIZE bytes is
not an error.
- -- Function: enum LZ_errno LZ_decompress_errno ( void * const DECODER )
+ -- Function: int LZ_decompress_write_size ( struct LZ_Decoder * const
+ DECODER )
+ The `LZ_decompress_write_size' function returns the maximum number
+ of bytes that can be inmediately written through the
+ `LZ_decompress_write' function.
+
+ It is guaranteed that an inmediate call to `LZ_decompress_write'
+ will accept a SIZE up to the returned number of bytes.
+
+ -- Function: enum LZ_Errno LZ_decompress_errno ( struct LZ_Decoder *
+ const DECODER )
Returns the current error code for DECODER (*note Error Codes::)
- -- Function: int LZ_decompress_finished ( void * const DECODER )
+ -- Function: int LZ_decompress_finished ( struct LZ_Decoder * const
+ DECODER )
Returns 1 if all the data has been read and `LZ_decompress_close'
can be safely called. Otherwise it returns 0.
- -- Function: long long LZ_decompress_data_position ( void * const
- DECODER )
+ -- Function: long long LZ_decompress_data_position ( struct LZ_Decoder
+ * const DECODER )
Returns the number of decompressed bytes already produced, but
perhaps not yet read, in the current member.
- -- Function: long long LZ_decompress_member_position ( void * const
- DECODER )
+ -- Function: long long LZ_decompress_member_position ( struct
+ LZ_Decoder * const DECODER )
Returns the number of input bytes already decompressed in the
current member.
- -- Function: long long LZ_decompress_total_in_size ( void * const
- DECODER )
+ -- Function: long long LZ_decompress_total_in_size ( struct LZ_Decoder
+ * const DECODER )
Returns the total number of input bytes already decompressed.
- -- Function: long long LZ_decompress_total_out_size ( void * const
- DECODER )
+ -- Function: long long LZ_decompress_total_out_size ( struct
+ LZ_Decoder * const DECODER )
Returns the total number of decompressed bytes already produced,
but perhaps not yet read.

-File: lzlib.info, Node: Error Codes, Next: Data Format, Prev: Decompression Functions, Up: Top
+File: lzlib.info, Node: Error Codes, Next: Error Messages, Prev: Decompression Functions, Up: Top
-6 Error Codes
+7 Error Codes
*************
Most library functions return -1 to indicate that they have failed. But
@@ -336,42 +412,58 @@ whether a call failed. If the call failed, then you can examine
The error codes are defined in the header file `lzlib.h'.
- -- Constant: enum LZ_errno LZ_ok
+ -- Constant: enum LZ_Errno LZ_ok
The value of this constant is 0 and is used to indicate that there
is no error.
- -- Constant: enum LZ_errno LZ_bad_argument
+ -- Constant: enum LZ_Errno LZ_bad_argument
At least one of the arguments passed to the library function was
invalid.
- -- Constant: enum LZ_errno LZ_mem_error
+ -- Constant: enum LZ_Errno LZ_mem_error
No memory available. The system cannot allocate more virtual memory
because its capacity is full.
- -- Constant: enum LZ_errno LZ_sequence_error
+ -- Constant: enum LZ_Errno LZ_sequence_error
A library function was called in the wrong order. For example
`LZ_compress_restart_member' was called before
`LZ_compress_member_finished' indicates that the current member is
finished.
- -- Constant: enum LZ_errno LZ_header_error
+ -- Constant: enum LZ_Errno LZ_header_error
Reading of member header failed. If this happens at the end of the
data stream it may indicate trailing garbage.
- -- Constant: enum LZ_errno LZ_unexpected_eof
+ -- Constant: enum LZ_Errno LZ_unexpected_eof
The end of the data stream was reached in the middle of a member.
- -- Constant: enum LZ_errno LZ_data_error
+ -- Constant: enum LZ_Errno LZ_data_error
The data stream is corrupt.
- -- Constant: enum LZ_errno LZ_library_error
+ -- Constant: enum LZ_Errno LZ_library_error
A bug was detected in the library. Please, report it (*note
Problems::).

-File: lzlib.info, Node: Data Format, Next: Examples, Prev: Error Codes, Up: Top
+File: lzlib.info, Node: Error Messages, Next: Data Format, Prev: Error Codes, Up: Top
+
+8 Error Messages
+****************
+
+ -- Function: const char * LZ_strerror ( const enum LZ_Errno LZ_ERRNO )
+ Returns the standard error message for a given error code. The
+ messages are fairly short; there are no multi-line messages or
+ embedded newlines. This function makes it easy for your program
+ to report informative error messages about the failure of a
+ library call.
+
+ The value of LZ_ERRNO normally comes from a call to
+ `LZ_(de)compress_errno'.
+
+
+File: lzlib.info, Node: Data Format, Next: Examples, Prev: Error Messages, Up: Top
-7 Data Format
+9 Data Format
*************
In the diagram below, a box like this:
@@ -433,8 +525,8 @@ with no additional information before, between, or after them.

File: lzlib.info, Node: Examples, Next: Problems, Prev: Data Format, Up: Top
-8 A small tutorial with examples
-********************************
+10 A small tutorial with examples
+*********************************
This chaper shows the order in which the library functions should be
called depending on what kind of data stream you want to compress or
@@ -453,7 +545,18 @@ Example 1: Normal compression (MEMBER_SIZE > total output).
8) LZ_compress_close
-Example 2: Decompression.
+Example 2: Normal compression using LZ_compress_write_size.
+
+ 1) LZ_compress_open
+ 2) go to step 5 if LZ_compress_write_size returns 0
+ 3) LZ_compress_write
+ 4) if no more data to write, call LZ_compress_finish
+ 5) LZ_compress_read
+ 6) go back to step 2 until LZ_compress_finished returns 1
+ 7) LZ_compress_close
+
+
+Example 3: Decompression.
1) LZ_decompress_open
2) LZ_decompress_write
@@ -465,24 +568,76 @@ Example 2: Decompression.
8) LZ_decompress_close
-Example 3: Multimember compression (MEMBER_SIZE < total output).
+Example 4: Decompression using LZ_decompress_write_size.
+
+ 1) LZ_decompress_open
+ 2) go to step 5 if LZ_decompress_write_size returns 0
+ 3) LZ_decompress_write
+ 4) if no more data to write, call LZ_decompress_finish
+ 5) LZ_decompress_read
+ 6) go back to step 2 until LZ_decompress_finished returns 1
+ 7) LZ_decompress_close
+
+
+Example 5: Multimember compression (MEMBER_SIZE < total output).
+
+ 1) LZ_compress_open
+ 2) go to step 5 if LZ_compress_write_size returns 0
+ 3) LZ_compress_write
+ 4) if no more data to write, call LZ_compress_finish
+ 5) LZ_compress_read
+ 6) go back to step 2 until LZ_compress_member_finished returns 1
+ 7) go to step 10 if LZ_compress_finished() returns 1
+ 8) LZ_compress_restart_member
+ 9) go back to step 2
+ 10) LZ_compress_close
+
+
+Example 6: Multimember compression (user-restarted members).
1) LZ_compress_open
2) LZ_compress_write
3) LZ_compress_read
- 4) go back to step 2 until LZ_compress_member_finished returns 1
- 5) LZ_compress_restart_member
- 6) go back to step 2 until all input data has been written
- 7) LZ_compress_finish
- 8) LZ_compress_read
- 9) go back to step 8 until LZ_compress_finished returns 1
- 10) LZ_compress_close
+ 4) go back to step 2 until member termination is desired
+ 5) LZ_compress_finish
+ 6) LZ_compress_read
+ 7) go back to step 6 until LZ_compress_member_finished returns 1
+ 8) verify that LZ_compress_finished returns 1
+ 9) go to step 12 if all input data has been written
+ 10) LZ_compress_restart_member
+ 11) go back to step 2
+ 12) LZ_compress_close
+
+
+Example 7: Decompression with automatic removal of leading garbage.
+
+ 1) LZ_decompress_open
+ 2) LZ_decompress_sync_to_member
+ 3) go to step 6 if LZ_decompress_write_size returns 0
+ 4) LZ_decompress_write
+ 5) if no more data to write, call LZ_decompress_finish
+ 6) LZ_decompress_read
+ 7) go back to step 3 until LZ_decompress_finished returns 1
+ 8) LZ_decompress_close
+
+
+Example 8: Streamed decompression with automatic resynchronization to
+next member in case of data error.
+
+ 1) LZ_decompress_open
+ 2) go to step 5 if LZ_decompress_write_size returns 0
+ 3) LZ_decompress_write
+ 4) if no more data to write, call LZ_decompress_finish
+ 5) if LZ_decompress_read produces LZ_header_error or LZ_data_error,
+ call LZ_decompress_sync_to_member
+ 6) go back to step 2 until LZ_decompress_finished returns 1
+ 7) LZ_decompress_close

File: lzlib.info, Node: Problems, Next: Concept Index, Prev: Examples, Up: Top
-9 Reporting Bugs
-****************
+11 Reporting Bugs
+*****************
There are probably bugs in Lzlib. There are certainly errors and
omissions in this manual. If you report them, they will get fixed. If
@@ -510,24 +665,28 @@ Concept Index
* decompression functions: Decompression Functions.
(line 6)
* error codes: Error Codes. (line 6)
+* error messages: Error Messages. (line 6)
* examples: Examples. (line 6)
* getting help: Problems. (line 6)
* introduction: Introduction. (line 6)
* library version: Library Version. (line 6)
+* parameter limits: Parameter Limits. (line 6)

Tag Table:
Node: Top219
-Node: Introduction1028
-Node: Library Version2803
-Node: Buffering3448
-Node: Compression Functions4555
-Node: Decompression Functions10057
-Node: Error Codes13495
-Node: Data Format15431
-Node: Examples17398
-Node: Problems18832
-Node: Concept Index19402
+Node: Introduction1157
+Node: Library Version2932
+Node: Buffering3577
+Node: Parameter Limits4697
+Node: Compression Functions5654
+Node: Decompression Functions11700
+Node: Error Codes16762
+Node: Error Messages18701
+Node: Data Format19280
+Node: Examples21250
+Node: Problems24826
+Node: Concept Index25398

End Tag Table
diff --git a/doc/lzlib.texinfo b/doc/lzlib.texinfo
index a824739..ae22e44 100644
--- a/doc/lzlib.texinfo
+++ b/doc/lzlib.texinfo
@@ -5,8 +5,8 @@
@finalout
@c %**end of header
-@set UPDATED 20 October 2009
-@set VERSION 0.7
+@set UPDATED 17 January 2010
+@set VERSION 0.8
@dircategory Data Compression
@direntry
@@ -35,9 +35,11 @@ This manual is for Lzlib (version @value{VERSION}, @value{UPDATED}).
* Introduction:: Purpose and features of Lzlib
* Library Version:: Checking library version
* Buffering:: Sizes of Lzlib's buffers
+* Parameter Limits:: Min / max values for some parameters
* Compression Functions:: Descriptions of the compression functions
* Decompression Functions:: Descriptions of the decompression functions
* Error Codes:: Meaning of codes returned by functions
+* Error Messages:: Error messages corresponding to error codes
* Data Format:: Detailed format of the compressed data
* Examples:: A small tutorial with examples
* Problems:: Reporting bugs
@@ -45,7 +47,7 @@ This manual is for Lzlib (version @value{VERSION}, @value{UPDATED}).
@end menu
@sp 1
-Copyright @copyright{} 2009 Antonio Diaz Diaz.
+Copyright @copyright{} 2009, 2010 Antonio Diaz Diaz.
This manual is free documentation: you have unlimited permission
to copy, distribute and modify it.
@@ -139,11 +141,43 @@ is larger.
@item Output decompression buffer. Read from by the
@samp{LZ_decompress_read} function. Its size is the dictionary size set
-with the @samp{LZ_decompress_open} function or 64KiB, whichever is
-larger.
+in the header of the member currently being decompressed or 64KiB,
+whichever is larger.
@end itemize
+@node Parameter Limits
+@chapter Parameter Limits
+@cindex parameter limits
+
+These functions provide minimum and maximum values for some parameters.
+Current values are shown in square brackets.
+
+@deftypefun int LZ_min_dictionary_bits ( void )
+Returns the base 2 logarithm of the smallest valid dictionary size [12].
+@end deftypefun
+
+@deftypefun int LZ_min_dictionary_size ( void )
+Returns the smallest valid dictionary size [4KiB].
+@end deftypefun
+
+@deftypefun int LZ_max_dictionary_bits ( void )
+Returns the base 2 logarithm of the largest valid dictionary size [29].
+@end deftypefun
+
+@deftypefun int LZ_max_dictionary_size ( void )
+Returns the largest valid dictionary size [512MiB].
+@end deftypefun
+
+@deftypefun int LZ_min_match_len_limit ( void )
+Returns the smallest valid match length limit [5].
+@end deftypefun
+
+@deftypefun int LZ_max_match_len_limit ( void )
+Returns the largest valid match length limit [273].
+@end deftypefun
+
+
@node Compression Functions
@chapter Compression Functions
@cindex compression functions
@@ -153,10 +187,11 @@ them return -1, except @samp{LZ_compress_open} whose return value must
be verified by calling @samp{LZ_compress_errno} before using it.
-@deftypefun {void *} LZ_compress_open ( const int @var{dictionary_size}, const int @var{match_len_limit}, const long long @var{member_size} )
+@deftypefun {struct LZ_Encoder *} LZ_compress_open ( const int @var{dictionary_size}, const int @var{match_len_limit}, const long long @var{member_size} )
Initializes the internal stream state for compression and returns a
pointer that can only be used as the @var{encoder} argument for the
-other LZ_compress functions.
+other LZ_compress functions, or a null pointer if the encoder could not
+be allocated.
The returned pointer must be verified by calling
@samp{LZ_compress_errno} before using it. If @samp{LZ_compress_errno}
@@ -180,15 +215,7 @@ for example LLONG_MAX.
@end deftypefun
-@deftypefun int LZ_compress_restart_member ( void * const @var{encoder}, const long long @var{member_size} )
-Use this function to start a new member, in a multimember data stream.
-Call this function only after @samp{LZ_compress_member_finished}
-indicates that the current member has been fully read (with the
-@samp{LZ_compress_read} function).
-@end deftypefun
-
-
-@deftypefun int LZ_compress_close ( void * const @var{encoder} )
+@deftypefun int LZ_compress_close ( struct LZ_Encoder * const @var{encoder} )
Frees all dynamically allocated data structures for this stream. This
function discards any unprocessed input and does not flush any pending
output. After a call to @samp{LZ_compress_close}, @var{encoder} can no
@@ -196,13 +223,24 @@ more be used as an argument to any LZ_compress function.
@end deftypefun
-@deftypefun int LZ_compress_finish ( void * const @var{encoder} )
-Use this function to tell @samp{lzlib} that all the data for this stream
+@deftypefun int LZ_compress_finish ( struct LZ_Encoder * const @var{encoder} )
+Use this function to tell @samp{lzlib} that all the data for this member
has already been written (with the @samp{LZ_compress_write} function).
+After all the produced compressed data has been read with
+@samp{LZ_compress_read} and @samp{LZ_compress_member_finished} returns
+1, a new member can be started with @samp{LZ_compress_restart_member}.
@end deftypefun
-@deftypefun int LZ_compress_sync_flush ( void * const @var{encoder} )
+@deftypefun int LZ_compress_restart_member ( struct LZ_Encoder * const @var{encoder}, const long long @var{member_size} )
+Use this function to start a new member, in a multimember data stream.
+Call this function only after @samp{LZ_compress_member_finished}
+indicates that the current member has been fully read (with the
+@samp{LZ_compress_read} function).
+@end deftypefun
+
+
+@deftypefun int LZ_compress_sync_flush ( struct LZ_Encoder * const @var{encoder} )
Use this function to make available to @samp{LZ_compress_read} all the
data already written with the @samp{LZ_compress_write} function.
Repeated use of @samp{LZ_compress_sync_flush} may degrade compression
@@ -210,7 +248,7 @@ ratio, so use it only when needed.
@end deftypefun
-@deftypefun int LZ_compress_read ( void * const @var{encoder}, uint8_t * const @var{buffer}, const int @var{size} )
+@deftypefun int LZ_compress_read ( struct LZ_Encoder * const @var{encoder}, uint8_t * const @var{buffer}, const int @var{size} )
The @samp{LZ_compress_read} function reads up to @var{size} bytes from
the stream pointed to by @var{encoder}, storing the results in
@var{buffer}.
@@ -223,7 +261,7 @@ in the stream or if more bytes have to be yet written with the
@end deftypefun
-@deftypefun int LZ_compress_write ( void * const @var{encoder}, uint8_t * const @var{buffer}, const int @var{size} )
+@deftypefun int LZ_compress_write ( struct LZ_Encoder * const @var{encoder}, uint8_t * const @var{buffer}, const int @var{size} )
The @samp{LZ_compress_write} function writes up to @var{size} bytes from
@var{buffer} to the stream pointed to by @var{encoder}.
@@ -233,7 +271,7 @@ not an error.
@end deftypefun
-@deftypefun int LZ_compress_write_size ( void * const @var{encoder} )
+@deftypefun int LZ_compress_write_size ( struct LZ_Encoder * const @var{encoder} )
The @samp{LZ_compress_write_size} function returns the maximum number of
bytes that can be inmediately written through the @samp{LZ_compress_write}
function.
@@ -243,42 +281,42 @@ accept a @var{size} up to the returned number of bytes.
@end deftypefun
-@deftypefun {enum LZ_errno} LZ_compress_errno ( void * const @var{encoder} )
+@deftypefun {enum LZ_Errno} LZ_compress_errno ( struct LZ_Encoder * const @var{encoder} )
Returns the current error code for @var{encoder} (@pxref{Error Codes})
@end deftypefun
-@deftypefun int LZ_compress_finished ( void * const @var{encoder} )
+@deftypefun int LZ_compress_finished ( struct LZ_Encoder * const @var{encoder} )
Returns 1 if all the data has been read and @samp{LZ_compress_close} can
be safely called. Otherwise it returns 0.
@end deftypefun
-@deftypefun int LZ_compress_member_finished ( void * const @var{encoder} )
+@deftypefun int LZ_compress_member_finished ( struct LZ_Encoder * const @var{encoder} )
Returns 1 if the current member, in a multimember data stream, has been
fully read and @samp{LZ_compress_restart_member} can be safely called.
Otherwise it returns 0.
@end deftypefun
-@deftypefun {long long} LZ_compress_data_position ( void * const @var{encoder} )
+@deftypefun {long long} LZ_compress_data_position ( struct LZ_Encoder * const @var{encoder} )
Returns the number of input bytes already compressed in the current
member.
@end deftypefun
-@deftypefun {long long} LZ_compress_member_position ( void * const @var{encoder} )
+@deftypefun {long long} LZ_compress_member_position ( struct LZ_Encoder * const @var{encoder} )
Returns the number of compressed bytes already produced, but perhaps not
yet read, in the current member.
@end deftypefun
-@deftypefun {long long} LZ_compress_total_in_size ( void * const @var{encoder} )
+@deftypefun {long long} LZ_compress_total_in_size ( struct LZ_Encoder * const @var{encoder} )
Returns the total number of input bytes already compressed.
@end deftypefun
-@deftypefun {long long} LZ_compress_total_out_size ( void * const @var{encoder} )
+@deftypefun {long long} LZ_compress_total_out_size ( struct LZ_Encoder * const @var{encoder} )
Returns the total number of compressed bytes already produced, but
perhaps not yet read.
@end deftypefun
@@ -293,10 +331,11 @@ of them return -1, except @samp{LZ_decompress_open} whose return value
must be verified by calling @samp{LZ_decompress_errno} before using it.
-@deftypefun {void *} LZ_decompress_open ( void )
+@deftypefun {struct LZ_Decoder *} LZ_decompress_open ( void )
Initializes the internal stream state for decompression and returns a
pointer that can only be used as the @var{decoder} argument for the
-other LZ_decompress functions.
+other LZ_decompress functions, or a null pointer if the decoder could
+not be allocated.
The returned pointer must be verified by calling
@samp{LZ_decompress_errno} before using it. If
@@ -306,7 +345,7 @@ pointer must not be used and should be freed with
@end deftypefun
-@deftypefun int LZ_decompress_close ( void * const @var{decoder} )
+@deftypefun int LZ_decompress_close ( struct LZ_Decoder * const @var{decoder} )
Frees all dynamically allocated data structures for this stream. This
function discards any unprocessed input and does not flush any pending
output. After a call to @samp{LZ_decompress_close}, @var{decoder} can no
@@ -314,13 +353,34 @@ more be used as an argument to any LZ_decompress function.
@end deftypefun
-@deftypefun int LZ_decompress_finish ( void * const @var{decoder} )
+@deftypefun int LZ_decompress_finish ( struct LZ_Decoder * const @var{decoder} )
Use this function to tell @samp{lzlib} that all the data for this stream
has already been written (with the @samp{LZ_decompress_write} function).
@end deftypefun
-@deftypefun int LZ_decompress_read ( void * const @var{decoder}, uint8_t * const @var{buffer}, const int @var{size} )
+@deftypefun int LZ_decompress_reset ( struct LZ_Decoder * const @var{decoder} )
+Resets the internal state of @var{decoder} as it was just after opening
+it with the @samp{LZ_decompress_open} function. Data stored in the
+internal buffers is discarded. Position counters are set to 0.
+@end deftypefun
+
+
+@deftypefun int LZ_decompress_sync_to_member ( struct LZ_Decoder * const @var{decoder} )
+Resets the error state of @var{decoder} and enters a search state that
+lasts until a new member header (or the end of the stream) is found.
+After a successful call to @samp{LZ_decompress_sync_to_member}, data
+written with @samp{LZ_decompress_write} will be consumed and
+@samp{LZ_decompress_read} will return 0 until a header is found.
+
+This function is useful to discard any data preceding the first member,
+or to discard the rest of the current member, for example in case of a
+data error. If the decoder is already at the beginning of a member, this
+function does nothing.
+@end deftypefun
+
+
+@deftypefun int LZ_decompress_read ( struct LZ_Decoder * const @var{decoder}, uint8_t * const @var{buffer}, const int @var{size} )
The @samp{LZ_decompress_read} function reads up to @var{size} bytes from
the stream pointed to by @var{decoder}, storing the results in
@var{buffer}.
@@ -333,7 +393,7 @@ in the stream or if more bytes have to be yet written with the
@end deftypefun
-@deftypefun int LZ_decompress_write ( void * const @var{decoder}, uint8_t * const @var{buffer}, const int @var{size} )
+@deftypefun int LZ_decompress_write ( struct LZ_Decoder * const @var{decoder}, uint8_t * const @var{buffer}, const int @var{size} )
The @samp{LZ_decompress_write} function writes up to @var{size} bytes from
@var{buffer} to the stream pointed to by @var{decoder}.
@@ -343,35 +403,45 @@ not an error.
@end deftypefun
-@deftypefun {enum LZ_errno} LZ_decompress_errno ( void * const @var{decoder} )
+@deftypefun int LZ_decompress_write_size ( struct LZ_Decoder * const @var{decoder} )
+The @samp{LZ_decompress_write_size} function returns the maximum number
+of bytes that can be inmediately written through the
+@samp{LZ_decompress_write} function.
+
+It is guaranteed that an inmediate call to @samp{LZ_decompress_write}
+will accept a @var{size} up to the returned number of bytes.
+@end deftypefun
+
+
+@deftypefun {enum LZ_Errno} LZ_decompress_errno ( struct LZ_Decoder * const @var{decoder} )
Returns the current error code for @var{decoder} (@pxref{Error Codes})
@end deftypefun
-@deftypefun int LZ_decompress_finished ( void * const @var{decoder} )
+@deftypefun int LZ_decompress_finished ( struct LZ_Decoder * const @var{decoder} )
Returns 1 if all the data has been read and @samp{LZ_decompress_close}
can be safely called. Otherwise it returns 0.
@end deftypefun
-@deftypefun {long long} LZ_decompress_data_position ( void * const @var{decoder} )
+@deftypefun {long long} LZ_decompress_data_position ( struct LZ_Decoder * const @var{decoder} )
Returns the number of decompressed bytes already produced, but perhaps
not yet read, in the current member.
@end deftypefun
-@deftypefun {long long} LZ_decompress_member_position ( void * const @var{decoder} )
+@deftypefun {long long} LZ_decompress_member_position ( struct LZ_Decoder * const @var{decoder} )
Returns the number of input bytes already decompressed in the current
member.
@end deftypefun
-@deftypefun {long long} LZ_decompress_total_in_size ( void * const @var{decoder} )
+@deftypefun {long long} LZ_decompress_total_in_size ( struct LZ_Decoder * const @var{decoder} )
Returns the total number of input bytes already decompressed.
@end deftypefun
-@deftypefun {long long} LZ_decompress_total_out_size ( void * const @var{decoder} )
+@deftypefun {long long} LZ_decompress_total_out_size ( struct LZ_Decoder * const @var{decoder} )
Returns the total number of decompressed bytes already produced, but
perhaps not yet read.
@end deftypefun
@@ -395,46 +465,61 @@ examine @samp{LZ_(de)compress_errno}.
The error codes are defined in the header file @samp{lzlib.h}.
-@deftypevr Constant {enum LZ_errno} LZ_ok
+@deftypevr Constant {enum LZ_Errno} LZ_ok
The value of this constant is 0 and is used to indicate that there is no
error.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_bad_argument
+@deftypevr Constant {enum LZ_Errno} LZ_bad_argument
At least one of the arguments passed to the library function was
invalid.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_mem_error
+@deftypevr Constant {enum LZ_Errno} LZ_mem_error
No memory available. The system cannot allocate more virtual memory
because its capacity is full.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_sequence_error
+@deftypevr Constant {enum LZ_Errno} LZ_sequence_error
A library function was called in the wrong order. For example
@samp{LZ_compress_restart_member} was called before
@samp{LZ_compress_member_finished} indicates that the current member is
finished.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_header_error
+@deftypevr Constant {enum LZ_Errno} LZ_header_error
Reading of member header failed. If this happens at the end of the data
stream it may indicate trailing garbage.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_unexpected_eof
+@deftypevr Constant {enum LZ_Errno} LZ_unexpected_eof
The end of the data stream was reached in the middle of a member.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_data_error
+@deftypevr Constant {enum LZ_Errno} LZ_data_error
The data stream is corrupt.
@end deftypevr
-@deftypevr Constant {enum LZ_errno} LZ_library_error
+@deftypevr Constant {enum LZ_Errno} LZ_library_error
A bug was detected in the library. Please, report it (@pxref{Problems}).
@end deftypevr
+@node Error Messages
+@chapter Error Messages
+@cindex error messages
+
+@deftypefun {const char *} LZ_strerror ( const enum LZ_Errno @var{lz_errno} )
+Returns the standard error message for a given error code. The messages
+are fairly short; there are no multi-line messages or embedded newlines.
+This function makes it easy for your program to report informative error
+messages about the failure of a library call.
+
+The value of @var{lz_errno} normally comes from a call to
+@samp{LZ_(de)compress_errno}.
+@end deftypefun
+
+
@node Data Format
@chapter Data Format
@cindex data format
@@ -528,7 +613,22 @@ Example 1: Normal compression (@var{member_size} > total output).
@sp 1
@noindent
-Example 2: Decompression.
+Example 2: Normal compression using LZ_compress_write_size.
+
+@example
+1) LZ_compress_open
+2) go to step 5 if LZ_compress_write_size returns 0
+3) LZ_compress_write
+4) if no more data to write, call LZ_compress_finish
+5) LZ_compress_read
+6) go back to step 2 until LZ_compress_finished returns 1
+7) LZ_compress_close
+@end example
+
+
+@sp 1
+@noindent
+Example 3: Decompression.
@example
1) LZ_decompress_open
@@ -544,19 +644,87 @@ Example 2: Decompression.
@sp 1
@noindent
-Example 3: Multimember compression (@var{member_size} < total output).
+Example 4: Decompression using LZ_decompress_write_size.
+
+@example
+1) LZ_decompress_open
+2) go to step 5 if LZ_decompress_write_size returns 0
+3) LZ_decompress_write
+4) if no more data to write, call LZ_decompress_finish
+5) LZ_decompress_read
+6) go back to step 2 until LZ_decompress_finished returns 1
+7) LZ_decompress_close
+@end example
+
+
+@sp 1
+@noindent
+Example 5: Multimember compression (@var{member_size} < total output).
+
+@example
+ 1) LZ_compress_open
+ 2) go to step 5 if LZ_compress_write_size returns 0
+ 3) LZ_compress_write
+ 4) if no more data to write, call LZ_compress_finish
+ 5) LZ_compress_read
+ 6) go back to step 2 until LZ_compress_member_finished returns 1
+ 7) go to step 10 if LZ_compress_finished() returns 1
+ 8) LZ_compress_restart_member
+ 9) go back to step 2
+10) LZ_compress_close
+@end example
+
+
+@sp 1
+@noindent
+Example 6: Multimember compression (user-restarted members).
@example
1) LZ_compress_open
2) LZ_compress_write
3) LZ_compress_read
- 4) go back to step 2 until LZ_compress_member_finished returns 1
- 5) LZ_compress_restart_member
- 6) go back to step 2 until all input data has been written
- 7) LZ_compress_finish
- 8) LZ_compress_read
- 9) go back to step 8 until LZ_compress_finished returns 1
-10) LZ_compress_close
+ 4) go back to step 2 until member termination is desired
+ 5) LZ_compress_finish
+ 6) LZ_compress_read
+ 7) go back to step 6 until LZ_compress_member_finished returns 1
+ 8) verify that LZ_compress_finished returns 1
+ 9) go to step 12 if all input data has been written
+10) LZ_compress_restart_member
+11) go back to step 2
+12) LZ_compress_close
+@end example
+
+
+@sp 1
+@noindent
+Example 7: Decompression with automatic removal of leading garbage.
+
+@example
+1) LZ_decompress_open
+2) LZ_decompress_sync_to_member
+3) go to step 6 if LZ_decompress_write_size returns 0
+4) LZ_decompress_write
+5) if no more data to write, call LZ_decompress_finish
+6) LZ_decompress_read
+7) go back to step 3 until LZ_decompress_finished returns 1
+8) LZ_decompress_close
+@end example
+
+
+@sp 1
+@noindent
+Example 8: Streamed decompression with automatic resynchronization to
+next member in case of data error.
+
+@example
+1) LZ_decompress_open
+2) go to step 5 if LZ_decompress_write_size returns 0
+3) LZ_decompress_write
+4) if no more data to write, call LZ_decompress_finish
+5) if LZ_decompress_read produces LZ_header_error or LZ_data_error,
+ call LZ_decompress_sync_to_member
+6) go back to step 2 until LZ_decompress_finished returns 1
+7) LZ_decompress_close
@end example
diff --git a/encoder.cc b/encoder.cc
index 3548afd..52bdd0b 100644
--- a/encoder.cc
+++ b/encoder.cc
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -31,8 +31,6 @@
#include <cerrno>
#include <cstdlib>
#include <cstring>
-#include <string>
-#include <vector>
#include <stdint.h>
#include "lzlib.h"
@@ -87,11 +85,12 @@ Matchfinder::Matchfinder( const int dict_size, const int len_limit )
void Matchfinder::reset() throw()
{
const int size = stream_pos - pos;
- std::memmove( buffer, buffer + pos, size );
+ if( size > 0 ) std::memmove( buffer, buffer + pos, size );
partial_data_pos = 0;
stream_pos -= pos;
pos = 0;
cyclic_pos = 0;
+ at_stream_end_ = false;
for( int i = 0; i < num_prev_positions; ++i ) prev_positions[i] = -1;
}
diff --git a/encoder.h b/encoder.h
index 4c3909d..dde87e5 100644
--- a/encoder.h
+++ b/encoder.h
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -186,7 +186,8 @@ public:
int dictionary_size() const throw() { return dictionary_size_; }
void flushing( const bool b ) throw() { at_stream_end_ = b; }
bool finished() const throw() { return at_stream_end_ && pos >= stream_pos; }
- int free_bytes() const throw() { return buffer_size - stream_pos; }
+ int free_bytes() const throw()
+ { if( at_stream_end_ ) return 0; return buffer_size - stream_pos; }
int match_len_limit() const throw() { return match_len_limit_; }
const uint8_t * ptr_to_current_pos() const throw() { return buffer + pos; }
@@ -234,14 +235,14 @@ class Range_encoder : public Circular_buffer
void shift_low()
{
const uint32_t carry = low >> 32;
- if( low < 0xFF000000 || carry == 1 )
+ if( low < 0xFF000000LL || carry == 1 )
{
put_byte( cache + carry );
for( ; ff_count > 0; --ff_count ) put_byte( 0xFF + carry );
cache = low >> 24;
}
else ++ff_count;
- low = ( low & 0x00FFFFFF ) << 8;
+ low = ( low & 0x00FFFFFFLL ) << 8;
}
public:
diff --git a/lzcheck.cc b/lzcheck.cc
index a81edbb..75f64c7 100644
--- a/lzcheck.cc
+++ b/lzcheck.cc
@@ -1,5 +1,5 @@
/* Lzcheck - A test program for the lzlib library
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This program is free software: you have unlimited permission
to copy, distribute and modify it.
@@ -8,9 +8,13 @@
lzcheck filename.txt
This program reads the specified text file and then compresses it,
- line by line, to test the flushing mechanism.
+ line by line, to test the flushing mechanism and the member
+ restart/reset/sync functions.
*/
+#define _FILE_OFFSET_BITS 64
+
+#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
@@ -29,7 +33,7 @@
#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
#endif
-const int buffer_size = 65536;
+const int buffer_size = 32768;
uint8_t in_buffer[buffer_size];
uint8_t mid_buffer[buffer_size];
uint8_t out_buffer[buffer_size];
@@ -54,8 +58,8 @@ int main( const int argc, const char * argv[] )
const int dictionary_size = 1 << 20;
const int match_len_limit = 80;
const long long member_size = LLONG_MAX;
- void * encoder = LZ_compress_open( dictionary_size, match_len_limit,
- member_size );
+ LZ_Encoder * encoder = LZ_compress_open( dictionary_size, match_len_limit,
+ member_size );
if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
{
const bool mem_error = ( LZ_compress_errno( encoder ) == LZ_mem_error );
@@ -69,7 +73,7 @@ int main( const int argc, const char * argv[] )
return 3;
}
- void * decoder = LZ_decompress_open();
+ LZ_Decoder * decoder = LZ_decompress_open();
if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
{
LZ_decompress_close( decoder );
@@ -77,35 +81,91 @@ int main( const int argc, const char * argv[] )
return 1;
}
- while( true )
+ int retval = 0;
+ while( retval <= 2 )
{
- const int read_size = std::fread( in_buffer, 1, buffer_size, file );
- if( read_size <= 0 ) break;
+ const int read_size = std::fread( in_buffer, 1, buffer_size / 2, file );
+ if( read_size <= 0 ) break; // end of file
for( int l = 0, r = 1; r <= read_size; l = r, ++r )
{
while( r < read_size && in_buffer[r-1] != '\n' ) ++r;
+ const int leading_garbage = (l == 0) ? std::min( r, read_size / 2 ) : 0;
const int in_size = LZ_compress_write( encoder, in_buffer + l, r - l );
if( in_size < r - l ) r = l + in_size;
LZ_compress_sync_flush( encoder );
- const int mid_size = LZ_compress_read( encoder, mid_buffer, buffer_size );
- LZ_decompress_write( decoder, mid_buffer, mid_size );
- const int out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+ if( leading_garbage )
+ std::memset( mid_buffer, in_buffer[0], leading_garbage );
+ const int mid_size = LZ_compress_read( encoder,
+ mid_buffer + leading_garbage,
+ buffer_size - leading_garbage );
+ if( mid_size < 0 )
+ {
+ std::fprintf( stderr, "LZ_compress_read error: %s.\n",
+ LZ_strerror( LZ_compress_errno( encoder ) ) );
+ retval = 3; break;
+ }
+ LZ_decompress_write( decoder, mid_buffer, mid_size + leading_garbage );
+ int out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+ if( out_size < 0 )
+ {
+ if( LZ_decompress_errno( decoder ) == LZ_header_error ||
+ LZ_decompress_errno( decoder ) == LZ_data_error )
+ {
+ LZ_decompress_sync_to_member( decoder ); // remove leading garbage
+ out_size = LZ_decompress_read( decoder, out_buffer, buffer_size );
+ }
+ if( out_size < 0 )
+ {
+ std::fprintf( stderr, "LZ_decompress_read error: %s.\n",
+ LZ_strerror( LZ_decompress_errno( decoder ) ) );
+ retval = 3; break;
+ }
+ }
if( out_size != in_size || std::memcmp( in_buffer + l, out_buffer, out_size ) )
{
- std::printf( "sync error at pos %d. in_size = %d, out_size = %d\n",
- l, in_size, out_size );
- for( int i = 0; i < in_size; ++i ) std::putchar( in_buffer[l+i] );
- if( in_buffer[l+in_size-1] != '\n' ) std::putchar( '\n' );
- for( int i = 0; i < out_size; ++i ) std::putchar( out_buffer[i] );
- std::putchar( '\n' );
+ std::fprintf( stderr, "sync error at pos %d. in_size = %d, out_size = %d\n",
+ l, in_size, out_size );
+ for( int i = 0; i < in_size; ++i )
+ std::fputc( in_buffer[l+i], stderr );
+ if( in_buffer[l+in_size-1] != '\n' )
+ std::fputc( '\n', stderr );
+ for( int i = 0; i < out_size; ++i )
+ std::fputc( out_buffer[i], stderr );
+ std::fputc( '\n', stderr );
+ retval = 1;
}
}
+ if( retval >= 3 ) break;
+
+ if( LZ_compress_finish( encoder ) < 0 ||
+ LZ_decompress_write( decoder, mid_buffer, LZ_compress_read( encoder, mid_buffer, buffer_size ) ) < 0 ||
+ LZ_decompress_read( decoder, out_buffer, buffer_size ) != 0 ||
+ LZ_decompress_reset( decoder ) < 0 ||
+ LZ_compress_restart_member( encoder, member_size ) < 0 )
+ {
+ std::fprintf( stderr, "can't restart member: %s.\n",
+ LZ_strerror( LZ_decompress_errno( decoder ) ) );
+ retval = 3; break;
+ }
+
+ const int size = std::min( 100, read_size );
+ if( LZ_compress_write( encoder, in_buffer, size ) != size ||
+ LZ_compress_finish( encoder ) < 0 ||
+ LZ_decompress_write( decoder, mid_buffer, LZ_compress_read( encoder, mid_buffer, buffer_size ) ) < 0 ||
+ LZ_decompress_read( decoder, out_buffer, 0 ) != 0 ||
+ LZ_decompress_sync_to_member( decoder ) < 0 ||
+ LZ_compress_restart_member( encoder, member_size ) < 0 )
+ {
+ std::fprintf( stderr, "can't seek to next member: %s.\n",
+ LZ_strerror( LZ_decompress_errno( decoder ) ) );
+ retval = 3; break;
+ }
}
LZ_decompress_close( decoder );
LZ_compress_close( encoder );
std::fclose( file );
- return 0;
+ return retval;
}
diff --git a/lzip.h b/lzip.h
index 60329a8..953dfe4 100644
--- a/lzip.h
+++ b/lzip.h
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -58,6 +58,10 @@ public:
};
+const int min_dictionary_bits = 12;
+const int min_dictionary_size = 1 << min_dictionary_bits;
+const int max_dictionary_bits = 29;
+const int max_dictionary_size = 1 << max_dictionary_bits;
const int literal_context_bits = 3;
const int pos_state_bits = 2;
const int pos_states = 1 << pos_state_bits;
@@ -80,6 +84,7 @@ const int max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols
const int min_match_len = 2; // must be 2
const int max_match_len = min_match_len + max_len_symbols - 1; // 273
+const int min_match_len_limit = 5;
const int max_dis_states = 4;
@@ -152,6 +157,13 @@ struct File_header
return ( version <= 1 );
}
+ bool verify() const throw()
+ {
+ return ( verify_magic() && verify_version() &&
+ dictionary_size() >= min_dictionary_size &&
+ dictionary_size() <= max_dictionary_size );
+ }
+
static int real_bits( const int value ) throw()
{
int bits = 0;
@@ -241,9 +253,9 @@ struct File_trailer
class Circular_buffer
{
protected:
- const int buffer_size;
+ const int buffer_size; // capacity == buffer_size - 1
uint8_t * const buffer;
- int get;
+ int get; // buffer is empty when get == put
int put;
void reset() throw() { get = 0; put = 0; }
diff --git a/lzlib.cc b/lzlib.cc
index 1eb191a..2f6acd9 100644
--- a/lzlib.cc
+++ b/lzlib.cc
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -27,7 +27,6 @@
#include <algorithm>
#include <cstring>
-#include <vector>
#include <stdint.h>
#include "lzlib.h"
@@ -36,19 +35,18 @@
#include "encoder.h"
-namespace {
-
-struct Encoder
+struct LZ_Encoder
{
long long partial_in_size;
long long partial_out_size;
Matchfinder * matchfinder;
LZ_encoder * lz_encoder;
- LZ_errno lz_errno;
+ LZ_Errno lz_errno;
int flush_pending;
const File_header member_header;
+ bool fatal;
- Encoder( const File_header & header ) throw()
+ LZ_Encoder( const File_header & header ) throw()
:
partial_in_size( 0 ),
partial_out_size( 0 ),
@@ -56,67 +54,96 @@ struct Encoder
lz_encoder( 0 ),
lz_errno( LZ_ok ),
flush_pending( 0 ),
- member_header( header )
+ member_header( header ),
+ fatal( false )
{}
};
-bool verify_encoder( void * const encoder )
+bool verify_encoder( LZ_Encoder * const encoder )
{
if( !encoder ) return false;
- Encoder & e = *(Encoder *)encoder;
- if( !e.matchfinder || !e.lz_encoder )
- { e.lz_errno = LZ_bad_argument; return false; }
+ if( !encoder->matchfinder || !encoder->lz_encoder )
+ { encoder->lz_errno = LZ_bad_argument; return false; }
return true;
}
-struct Decoder
+struct LZ_Decoder
{
long long partial_in_size;
long long partial_out_size;
Input_buffer * ibuf;
LZ_decoder * lz_decoder;
- LZ_errno lz_errno;
+ LZ_Errno lz_errno;
+ bool fatal;
+ bool seeking;
- Decoder() throw()
+ LZ_Decoder() throw()
:
partial_in_size( 0 ),
partial_out_size( 0 ),
ibuf( 0 ),
lz_decoder( 0 ),
- lz_errno( LZ_ok )
+ lz_errno( LZ_ok ),
+ fatal( false ),
+ seeking( false )
{}
};
-bool verify_decoder( void * const decoder )
+bool verify_decoder( struct LZ_Decoder * const decoder )
{
if( !decoder ) return false;
- if( !((Decoder *)decoder)->ibuf )
- { ((Decoder *)decoder)->lz_errno = LZ_bad_argument; return false; }
+ if( !decoder->ibuf )
+ { decoder->lz_errno = LZ_bad_argument; return false; }
return true;
}
-} // end namespace
+const char * LZ_version() { return LZ_version_string; }
+const char * LZ_strerror( const LZ_Errno lz_errno )
+ {
+ switch( lz_errno )
+ {
+ case LZ_ok : return "ok";
+ case LZ_bad_argument : return "bad argument";
+ case LZ_mem_error : return "not enough memory";
+ case LZ_sequence_error: return "sequence error";
+ case LZ_header_error : return "header error";
+ case LZ_unexpected_eof: return "unexpected eof";
+ case LZ_data_error : return "data error";
+ case LZ_library_error : return "library error";
+ }
+ return "invalid error code";
+ }
-const char * LZ_version() { return LZ_version_string; }
+int LZ_min_dictionary_bits() { return min_dictionary_bits; }
+int LZ_min_dictionary_size() { return min_dictionary_size; }
+int LZ_max_dictionary_bits() { return max_dictionary_bits; }
+int LZ_max_dictionary_size() { return max_dictionary_size; }
+int LZ_min_match_len_limit() { return min_match_len_limit; }
+int LZ_max_match_len_limit() { return max_match_len; }
-void * LZ_compress_open( const int dictionary_size, const int match_len_limit,
- const long long member_size )
+
+/*---------------------- Compression Functions ----------------------*/
+
+LZ_Encoder * LZ_compress_open( const int dictionary_size,
+ const int match_len_limit,
+ const long long member_size )
{
File_header header;
header.set_magic();
const bool error = ( !header.dictionary_size( dictionary_size ) ||
- match_len_limit < 5 || match_len_limit > max_match_len );
+ match_len_limit < min_match_len_limit ||
+ match_len_limit > max_match_len );
- Encoder * encoder = new( std::nothrow ) Encoder( header );
+ LZ_Encoder * encoder = new( std::nothrow ) LZ_Encoder( header );
if( !encoder ) return 0;
- Encoder & e = *encoder;
+ LZ_Encoder & e = *encoder;
if( error ) e.lz_errno = LZ_bad_argument;
else
{
@@ -138,15 +165,35 @@ void * LZ_compress_open( const int dictionary_size, const int match_len_limit,
}
if( !e.lz_encoder ) e.lz_errno = LZ_mem_error;
}
+ if( e.lz_errno != LZ_ok ) e.fatal = true;
return encoder;
}
-int LZ_compress_restart_member( void * const encoder,
+int LZ_compress_close( LZ_Encoder * const encoder )
+ {
+ if( !encoder ) return -1;
+ if( encoder->lz_encoder ) delete encoder->lz_encoder;
+ if( encoder->matchfinder ) delete encoder->matchfinder;
+ delete encoder;
+ return 0;
+ }
+
+
+int LZ_compress_finish( LZ_Encoder * const encoder )
+ {
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ encoder->matchfinder->flushing( true );
+ encoder->flush_pending = 0;
+ return 0;
+ }
+
+
+int LZ_compress_restart_member( LZ_Encoder * const encoder,
const long long member_size )
{
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ LZ_Encoder & e = *encoder;
if( !e.lz_encoder->member_finished() )
{ e.lz_errno = LZ_sequence_error; return -1; }
@@ -159,42 +206,22 @@ int LZ_compress_restart_member( void * const encoder,
e.lz_encoder = new LZ_encoder( *e.matchfinder, e.member_header, member_size );
}
catch( std::bad_alloc )
- { e.lz_encoder = 0; e.lz_errno = LZ_mem_error; return -1; }
- return 0;
- }
-
-
-int LZ_compress_close( void * const encoder )
- {
- if( !encoder ) return -1;
- Encoder & e = *(Encoder *)encoder;
- if( e.lz_encoder ) delete e.lz_encoder;
- if( e.matchfinder ) delete e.matchfinder;
- delete (Encoder *)encoder;
- return 0;
- }
-
-
-int LZ_compress_finish( void * const encoder )
- {
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- e.matchfinder->flushing( true );
- e.flush_pending = 0;
+ { e.lz_encoder = 0; e.lz_errno = LZ_mem_error; e.fatal = true; return -1; }
+ e.lz_errno = LZ_ok;
return 0;
}
-int LZ_compress_sync_flush( void * const encoder )
+int LZ_compress_sync_flush( LZ_Encoder * const encoder )
{
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ LZ_Encoder & e = *encoder;
if( !e.flush_pending && !e.matchfinder->at_stream_end() )
{
e.flush_pending = 2; // 2 consecutive markers guarantee decoding
e.matchfinder->flushing( true );
if( !e.lz_encoder->encode_member( false ) )
- { e.lz_errno = LZ_library_error; return -1; }
+ { e.lz_errno = LZ_library_error; e.fatal = true; return -1; }
while( e.flush_pending > 0 && e.lz_encoder->sync_flush() )
{ if( --e.flush_pending <= 0 ) e.matchfinder->flushing( false ); }
}
@@ -202,127 +229,159 @@ int LZ_compress_sync_flush( void * const encoder )
}
-int LZ_compress_read( void * const encoder, uint8_t * const buffer,
- const int size )
+int LZ_compress_read( LZ_Encoder * const encoder,
+ uint8_t * const buffer, const int size )
{
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ LZ_Encoder & e = *encoder;
if( !e.lz_encoder->encode_member( !e.flush_pending ) )
- { e.lz_errno = LZ_library_error; return -1; }
+ { e.lz_errno = LZ_library_error; e.fatal = true; return -1; }
while( e.flush_pending > 0 && e.lz_encoder->sync_flush() )
{ if( --e.flush_pending <= 0 ) e.matchfinder->flushing( false ); }
return e.lz_encoder->read_data( buffer, size );
}
-int LZ_compress_write( void * const encoder, const uint8_t * const buffer,
- const int size )
+int LZ_compress_write( LZ_Encoder * const encoder,
+ const uint8_t * const buffer, const int size )
{
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- if( e.flush_pending ) return 0;
- return e.matchfinder->write_data( buffer, size );
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ if( encoder->flush_pending ) return 0;
+ return encoder->matchfinder->write_data( buffer, size );
}
-int LZ_compress_write_size( void * const encoder )
+int LZ_compress_write_size( LZ_Encoder * const encoder )
{
- if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- if( e.flush_pending ) return 0;
- return e.matchfinder->free_bytes();
+ if( !verify_encoder( encoder ) || encoder->fatal ) return -1;
+ if( encoder->flush_pending ) return 0;
+ return encoder->matchfinder->free_bytes();
}
-enum LZ_errno LZ_compress_errno( void * const encoder )
+LZ_Errno LZ_compress_errno( LZ_Encoder * const encoder )
{
if( !encoder ) return LZ_bad_argument;
- return ((Encoder *)encoder)->lz_errno;
+ return encoder->lz_errno;
}
-int LZ_compress_finished( void * const encoder )
+int LZ_compress_finished( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- return ( !e.flush_pending && e.matchfinder->finished() &&
- e.lz_encoder->member_finished() );
+ return ( !encoder->flush_pending && encoder->matchfinder->finished() &&
+ encoder->lz_encoder->member_finished() );
}
-int LZ_compress_member_finished( void * const encoder )
+int LZ_compress_member_finished( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- return ((Encoder *)encoder)->lz_encoder->member_finished();
+ return encoder->lz_encoder->member_finished();
}
-long long LZ_compress_data_position( void * const encoder )
+long long LZ_compress_data_position( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- return ((Encoder *)encoder)->matchfinder->data_position();
+ return encoder->matchfinder->data_position();
}
-long long LZ_compress_member_position( void * const encoder )
+long long LZ_compress_member_position( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- return ((Encoder *)encoder)->lz_encoder->member_position();
+ return encoder->lz_encoder->member_position();
}
-long long LZ_compress_total_in_size( void * const encoder )
+long long LZ_compress_total_in_size( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- return e.partial_in_size + e.matchfinder->data_position();
+ return encoder->partial_in_size + encoder->matchfinder->data_position();
}
-long long LZ_compress_total_out_size( void * const encoder )
+long long LZ_compress_total_out_size( LZ_Encoder * const encoder )
{
if( !verify_encoder( encoder ) ) return -1;
- Encoder & e = *(Encoder *)encoder;
- return e.partial_out_size + e.lz_encoder->member_position();
+ return encoder->partial_out_size + encoder->lz_encoder->member_position();
}
-void * LZ_decompress_open()
+/*--------------------- Decompression Functions ---------------------*/
+
+struct LZ_Decoder * LZ_decompress_open()
{
- Decoder * decoder = new( std::nothrow ) Decoder();
+ LZ_Decoder * decoder = new( std::nothrow ) LZ_Decoder;
if( !decoder ) return 0;
- try { decoder->ibuf = new Input_buffer(); }
+ LZ_Decoder & d = *decoder;
+ try { d.ibuf = new Input_buffer; }
catch( std::bad_alloc )
- { decoder->ibuf = 0; decoder->lz_errno = LZ_mem_error; }
+ { d.ibuf = 0; d.lz_errno = LZ_mem_error; d.fatal = true; }
return decoder;
}
-int LZ_decompress_close( void * const decoder )
+int LZ_decompress_close( struct LZ_Decoder * const decoder )
{
if( !decoder ) return -1;
- Decoder & d = *(Decoder *)decoder;
- if( d.lz_decoder ) delete d.lz_decoder;
- if( d.ibuf ) delete d.ibuf;
- delete (Decoder *)decoder;
+ if( decoder->lz_decoder ) delete decoder->lz_decoder;
+ if( decoder->ibuf ) delete decoder->ibuf;
+ delete decoder;
return 0;
}
-int LZ_decompress_finish( void * const decoder )
+int LZ_decompress_finish( struct LZ_Decoder * const decoder )
+ {
+ if( !verify_decoder( decoder ) || decoder->fatal ) return -1;
+ LZ_Decoder & d = *decoder;
+ if( d.seeking ) { d.seeking = false; d.ibuf->purge(); }
+ else d.ibuf->finish();
+ return 0;
+ }
+
+
+int LZ_decompress_reset( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- ((Decoder *)decoder)->ibuf->finish();
+ LZ_Decoder & d = *decoder;
+ if( d.lz_decoder ) { delete d.lz_decoder; d.lz_decoder = 0; }
+ d.partial_in_size = 0;
+ d.partial_out_size = 0;
+ d.ibuf->reset();
+ d.lz_errno = LZ_ok;
+ d.fatal = false;
+ d.seeking = false;
return 0;
}
-int LZ_decompress_read( void * const decoder, uint8_t * const buffer,
- const int size )
+int LZ_decompress_sync_to_member( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- Decoder & d = *(Decoder *)decoder;
+ LZ_Decoder & d = *decoder;
+ if( d.lz_decoder ) { delete d.lz_decoder; d.lz_decoder = 0; }
+ if( d.ibuf->find_header() ) d.seeking = false;
+ else
+ {
+ if( !d.ibuf->at_stream_end() ) d.seeking = true;
+ else { d.seeking = false; d.ibuf->purge(); }
+ }
+ d.lz_errno = LZ_ok;
+ d.fatal = false;
+ return 0;
+ }
+
+
+int LZ_decompress_read( struct LZ_Decoder * const decoder,
+ uint8_t * const buffer, const int size )
+ {
+ if( !verify_decoder( decoder ) || decoder->fatal ) return -1;
+ LZ_Decoder & d = *decoder;
+ if( d.seeking ) return 0;
if( d.lz_decoder && d.lz_decoder->member_finished() )
{
d.partial_in_size += d.lz_decoder->member_position();
@@ -337,25 +396,22 @@ int LZ_decompress_read( void * const decoder, uint8_t * const buffer,
if( !d.ibuf->at_stream_end() || d.ibuf->finished() ) return 0;
d.ibuf->purge(); // remove trailing garbage
d.lz_errno = LZ_header_error;
+ d.fatal = true;
return -1;
}
File_header header;
- for( unsigned int i = 0; i < sizeof header; ++i )
- ((uint8_t *)&header)[i] = d.ibuf->get_byte();
- if( !header.verify_magic() || !header.verify_version() ||
- header.dictionary_size() < min_dictionary_size ||
- header.dictionary_size() > max_dictionary_size )
+ if( !d.ibuf->read_header( header ) )
{
- d.ibuf->purge(); // remove trailing garbage
d.lz_errno = LZ_header_error;
+ d.fatal = true;
return -1;
}
try { d.lz_decoder = new LZ_decoder( header, *d.ibuf ); }
catch( std::bad_alloc ) // not enough free memory
{
- d.ibuf->purge();
d.lz_decoder = 0;
d.lz_errno = LZ_mem_error;
+ d.fatal = true;
return -1;
}
}
@@ -364,69 +420,84 @@ int LZ_decompress_read( void * const decoder, uint8_t * const buffer,
{
if( result == 2 ) d.lz_errno = LZ_unexpected_eof;
else d.lz_errno = LZ_data_error;
+ d.fatal = true;
return -1;
}
return d.lz_decoder->read_data( buffer, size );
}
-int LZ_decompress_write( void * const decoder, const uint8_t * const buffer,
- const int size )
+int LZ_decompress_write( struct LZ_Decoder * const decoder,
+ const uint8_t * const buffer, const int size )
{
- if( !verify_decoder( decoder ) ) return -1;
- return ((Decoder *)decoder)->ibuf->write_data( buffer, size );
+ if( !verify_decoder( decoder ) || decoder->fatal ) return -1;
+ LZ_Decoder & d = *decoder;
+ int result = d.ibuf->write_data( buffer, size );
+ while( d.seeking )
+ {
+ if( d.ibuf->find_header() ) d.seeking = false;
+ if( result >= size ) break;
+ const int size2 = d.ibuf->write_data( buffer + result, size - result );
+ if( size2 > 0 ) result += size2;
+ else break;
+ }
+ return result;
+ }
+
+
+int LZ_decompress_write_size( struct LZ_Decoder * const decoder )
+ {
+ if( !verify_decoder( decoder ) || decoder->fatal ) return -1;
+ return decoder->ibuf->free_bytes();
}
-enum LZ_errno LZ_decompress_errno( void * const decoder )
+LZ_Errno LZ_decompress_errno( struct LZ_Decoder * const decoder )
{
if( !decoder ) return LZ_bad_argument;
- return ((Decoder *)decoder)->lz_errno;
+ return decoder->lz_errno;
}
-int LZ_decompress_finished( void * const decoder )
+int LZ_decompress_finished( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- Decoder & d = *(Decoder *)decoder;
- return ( d.ibuf->finished() &&
- ( !d.lz_decoder || d.lz_decoder->member_finished() ) );
+ return ( decoder->ibuf->finished() &&
+ ( !decoder->lz_decoder || decoder->lz_decoder->member_finished() ) );
}
-long long LZ_decompress_data_position( void * const decoder )
+long long LZ_decompress_data_position( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- if( ((Decoder *)decoder)->lz_decoder )
- return ((Decoder *)decoder)->lz_decoder->data_position();
+ if( decoder->lz_decoder )
+ return decoder->lz_decoder->data_position();
else return 0;
}
-long long LZ_decompress_member_position( void * const decoder )
+long long LZ_decompress_member_position( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- if( ((Decoder *)decoder)->lz_decoder )
- return ((Decoder *)decoder)->lz_decoder->member_position();
+ if( decoder->lz_decoder )
+ return decoder->lz_decoder->member_position();
else return 0;
}
-long long LZ_decompress_total_in_size( void * const decoder )
+long long LZ_decompress_total_in_size( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- Decoder & d = *(Decoder *)decoder;
- if( d.lz_decoder )
- return d.partial_in_size + d.lz_decoder->member_position();
- return d.partial_in_size;
+ if( decoder->lz_decoder )
+ return decoder->partial_in_size + decoder->lz_decoder->member_position();
+ return decoder->partial_in_size;
}
-long long LZ_decompress_total_out_size( void * const decoder )
+long long LZ_decompress_total_out_size( struct LZ_Decoder * const decoder )
{
if( !verify_decoder( decoder ) ) return -1;
- Decoder & d = *(Decoder *)decoder;
- if( d.lz_decoder )
- return d.partial_out_size + d.lz_decoder->data_position();
- return d.partial_out_size;
+ if( decoder->lz_decoder )
+ return decoder->partial_out_size + decoder->lz_decoder->data_position();
+ return decoder->partial_out_size;
}
diff --git a/lzlib.h b/lzlib.h
index 48a1b91..5ceb94d 100644
--- a/lzlib.h
+++ b/lzlib.h
@@ -1,5 +1,5 @@
/* Lzlib - A compression library for lzip files
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
As a special exception, you may use this file as part of a free
software library without restriction. Specifically, if other files
@@ -29,61 +29,78 @@
extern "C" {
#endif
-const char * const LZ_version_string = "0.7";
+const char * const LZ_version_string = "0.8";
-enum { min_dictionary_bits = 12,
- min_dictionary_size = 1 << min_dictionary_bits,
- max_dictionary_bits = 29,
- max_dictionary_size = 1 << max_dictionary_bits };
-
-enum LZ_errno { LZ_ok = 0, LZ_bad_argument, LZ_mem_error, LZ_sequence_error,
- LZ_header_error, LZ_unexpected_eof, LZ_data_error,
- LZ_library_error };
+enum LZ_Errno { LZ_ok = 0, LZ_bad_argument, LZ_mem_error,
+ LZ_sequence_error, LZ_header_error, LZ_unexpected_eof,
+ LZ_data_error, LZ_library_error };
const char * LZ_version( void );
+const char * LZ_strerror( const enum LZ_Errno lz_errno );
+
+int LZ_min_dictionary_bits( void );
+int LZ_min_dictionary_size( void );
+int LZ_max_dictionary_bits( void );
+int LZ_max_dictionary_size( void );
+int LZ_min_match_len_limit( void );
+int LZ_max_match_len_limit( void );
+
+
+/*---------------------- Compression Functions ----------------------*/
+struct LZ_Encoder;
-void * LZ_compress_open( const int dictionary_size, const int match_len_limit,
- const long long member_size );
-int LZ_compress_restart_member( void * const encoder,
+struct LZ_Encoder * LZ_compress_open( const int dictionary_size,
+ const int match_len_limit,
+ const long long member_size );
+int LZ_compress_close( struct LZ_Encoder * const encoder );
+
+int LZ_compress_finish( struct LZ_Encoder * const encoder );
+int LZ_compress_restart_member( struct LZ_Encoder * const encoder,
const long long member_size );
-int LZ_compress_close( void * const encoder );
-int LZ_compress_finish( void * const encoder );
-int LZ_compress_sync_flush( void * const encoder );
-
-int LZ_compress_read( void * const encoder, uint8_t * const buffer,
- const int size );
-int LZ_compress_write( void * const encoder, const uint8_t * const buffer,
- const int size );
-int LZ_compress_write_size( void * const encoder );
-
-enum LZ_errno LZ_compress_errno( void * const encoder );
-int LZ_compress_finished( void * const encoder );
-int LZ_compress_member_finished( void * const encoder );
-
-long long LZ_compress_data_position( void * const encoder );
-long long LZ_compress_member_position( void * const encoder );
-long long LZ_compress_total_in_size( void * const encoder );
-long long LZ_compress_total_out_size( void * const encoder );
-
-
-void * LZ_decompress_open( void );
-int LZ_decompress_close( void * const decoder );
-int LZ_decompress_finish( void * const decoder );
-
-int LZ_decompress_read( void * const decoder, uint8_t * const buffer,
- const int size );
-int LZ_decompress_write( void * const decoder, const uint8_t * const buffer,
- const int size );
-
-enum LZ_errno LZ_decompress_errno( void * const decoder );
-int LZ_decompress_finished( void * const decoder );
-
-long long LZ_decompress_data_position( void * const decoder );
-long long LZ_decompress_member_position( void * const decoder );
-long long LZ_decompress_total_in_size( void * const decoder );
-long long LZ_decompress_total_out_size( void * const decoder );
+int LZ_compress_sync_flush( struct LZ_Encoder * const encoder );
+
+int LZ_compress_read( struct LZ_Encoder * const encoder,
+ uint8_t * const buffer, const int size );
+int LZ_compress_write( struct LZ_Encoder * const encoder,
+ const uint8_t * const buffer, const int size );
+int LZ_compress_write_size( struct LZ_Encoder * const encoder );
+
+enum LZ_Errno LZ_compress_errno( struct LZ_Encoder * const encoder );
+int LZ_compress_finished( struct LZ_Encoder * const encoder );
+int LZ_compress_member_finished( struct LZ_Encoder * const encoder );
+
+long long LZ_compress_data_position( struct LZ_Encoder * const encoder );
+long long LZ_compress_member_position( struct LZ_Encoder * const encoder );
+long long LZ_compress_total_in_size( struct LZ_Encoder * const encoder );
+long long LZ_compress_total_out_size( struct LZ_Encoder * const encoder );
+
+
+/*--------------------- Decompression Functions ---------------------*/
+
+struct LZ_Decoder;
+
+struct LZ_Decoder * LZ_decompress_open( void );
+int LZ_decompress_close( struct LZ_Decoder * const decoder );
+
+int LZ_decompress_finish( struct LZ_Decoder * const decoder );
+int LZ_decompress_reset( struct LZ_Decoder * const decoder );
+int LZ_decompress_sync_to_member( struct LZ_Decoder * const decoder );
+
+int LZ_decompress_read( struct LZ_Decoder * const decoder,
+ uint8_t * const buffer, const int size );
+int LZ_decompress_write( struct LZ_Decoder * const decoder,
+ const uint8_t * const buffer, const int size );
+int LZ_decompress_write_size( struct LZ_Decoder * const decoder );
+
+enum LZ_Errno LZ_decompress_errno( struct LZ_Decoder * const decoder );
+int LZ_decompress_finished( struct LZ_Decoder * const decoder );
+
+long long LZ_decompress_data_position( struct LZ_Decoder * const decoder );
+long long LZ_decompress_member_position( struct LZ_Decoder * const decoder );
+long long LZ_decompress_total_in_size( struct LZ_Decoder * const decoder );
+long long LZ_decompress_total_out_size( struct LZ_Decoder * const decoder );
#ifdef __cplusplus
}
diff --git a/main.cc b/main.cc
index 7a415a9..f751c2a 100644
--- a/main.cc
+++ b/main.cc
@@ -1,5 +1,5 @@
/* Minilzip - A test program for the lzlib library
- Copyright (C) 2009 Antonio Diaz Diaz.
+ Copyright (C) 2009, 2010 Antonio Diaz Diaz.
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
@@ -63,7 +63,7 @@ namespace {
const char * invocation_name = 0;
const char * const Program_name = "Minilzip";
const char * const program_name = "minilzip";
-const char * const program_year = "2009";
+const char * const program_year = "2010";
struct { const char * from; const char * to; } const known_extensions[] = {
{ ".lz", "" },
@@ -145,7 +145,7 @@ void show_help() throw()
std::printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" );
std::printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" );
std::printf( "\nReport bugs to lzip-bug@nongnu.org\n" );
- std::printf( "Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" );
+ std::printf( "Lzlib home page: http://www.nongnu.org/lzip/lzlib.html\n" );
}
@@ -159,30 +159,6 @@ void show_version() throw()
}
-const char * format_num( long long num, long long limit = 9999,
- const int set_prefix = 0 ) throw()
- {
- const char * const si_prefix[8] =
- { "k", "M", "G", "T", "P", "E", "Z", "Y" };
- const char * const binary_prefix[8] =
- { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
- static bool si = false;
- static char buf[16];
-
- if( set_prefix ) si = ( set_prefix > 0 );
- const int factor = ( si ) ? 1000 : 1024;
- const char * const *prefix = ( si ) ? si_prefix : binary_prefix;
- const char *p = "";
- limit = std::max( 999LL, std::min( 999999LL, limit ) );
-
- for( int i = 0; i < 8 && ( llabs( num ) > limit ||
- ( llabs( num ) >= factor && num % factor == 0 ) ); ++i )
- { num /= factor; p = prefix[i]; }
- snprintf( buf, sizeof buf, "%lld %s", num, p );
- return buf;
- }
-
-
long long getnum( const char * ptr, const int bs = 0,
const long long llimit = LLONG_MIN + 1,
const long long ulimit = LLONG_MAX ) throw()
@@ -218,7 +194,7 @@ long long getnum( const char * ptr, const int bs = 0,
break;
case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
break;
- default: bad_multiplier = true;
+ default : bad_multiplier = true;
}
if( bad_multiplier )
{
@@ -245,9 +221,10 @@ int get_dict_size( const char * arg ) throw()
{
char *tail;
int bits = std::strtol( arg, &tail, 0 );
- if( bits >= min_dictionary_bits && bits <= max_dictionary_bits && *tail == 0 )
+ if( bits >= LZ_min_dictionary_bits() &&
+ bits <= LZ_max_dictionary_bits() && *tail == 0 )
return ( 1 << bits );
- return getnum( arg, 0, min_dictionary_size, max_dictionary_size );
+ return getnum( arg, 0, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
}
@@ -390,31 +367,30 @@ void cleanup_and_fail( const int retval ) throw()
// Set permissions, owner and times.
-void close_and_set_permissions( const struct stat * in_statsp, int * retvalp )
+void close_and_set_permissions( const struct stat * const in_statsp )
{
- int tmp = 0;
+ bool error = false;
if( in_statsp )
{
- if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1;
- if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
+ if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) error = true;
+ else (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
// fchown will in many cases return with EPERM, which can be safely ignored.
}
if( close( outhandle ) == 0 ) outhandle = -1;
else cleanup_and_fail( 1 );
delete_output_on_interrupt = false;
if( !in_statsp ) return;
- if( !tmp )
+ if( !error )
{
struct utimbuf t;
t.actime = in_statsp->st_atime;
t.modtime = in_statsp->st_mtime;
- tmp = utime( output_filename.c_str(), &t );
+ if( utime( output_filename.c_str(), &t ) != 0 ) error = true;
}
- if( tmp )
+ if( error )
{
- if( tmp > *retvalp ) *retvalp = tmp;
show_error( "I can't change output file attributes." );
- cleanup_and_fail( *retvalp );
+ cleanup_and_fail( 1 );
}
}
@@ -432,58 +408,55 @@ bool next_filename()
}
-int compress( const long long member_size, const long long volume_size,
- lzma_options encoder_options, const int inhandle,
- const Pretty_print & pp, const struct stat * in_statsp,
- int * retvalp )
+int do_compress( LZ_Encoder * const encoder, const long long member_size,
+ const long long volume_size, const int inhandle,
+ const Pretty_print & pp, const struct stat * const in_statsp )
{
- if( verbosity >= 1 ) pp();
- void * encoder = LZ_compress_open( encoder_options.dictionary_size,
- encoder_options.match_len_limit,
- std::min( member_size, volume_size ) );
- if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
- {
- const bool mem_error = ( LZ_compress_errno( encoder ) == LZ_mem_error );
- LZ_compress_close( encoder );
- if( mem_error )
- { pp( "not enough memory. Try a smaller dictionary size" ); return 1; }
- internal_error( "invalid argument to encoder" );
- }
-
long long partial_volume_size = 0;
const int out_buffer_size = 65536, in_buffer_size = 8 * out_buffer_size;
uint8_t in_buffer[in_buffer_size], out_buffer[out_buffer_size];
+
+ if( verbosity >= 1 ) pp();
while( true )
{
int in_size = std::min( LZ_compress_write_size( encoder ), in_buffer_size );
if( in_size > 0 )
{
- in_size = readblock( inhandle, (char *)in_buffer, in_size );
+ const int max_in_size = in_size;
+ in_size = readblock( inhandle, (char *)in_buffer, max_in_size );
+ if( in_size != max_in_size && errno )
+ { pp(); show_error( "read error", errno ); return 1; }
if( in_size == 0 ) LZ_compress_finish( encoder );
else if( in_size != LZ_compress_write( encoder, in_buffer, in_size ) )
- internal_error( "library error" );
+ internal_error( "library error (LZ_compress_write)" );
}
int out_size = LZ_compress_read( encoder, out_buffer, out_buffer_size );
// std::fprintf( stderr, "%6d in_size, %5d out_size.\n", in_size, out_size );
if( out_size < 0 )
- { pp(); show_error( "read error", errno ); return 1; }
+ {
+ pp();
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "LZ_compress_read error: %s.\n",
+ LZ_strerror( LZ_compress_errno( encoder ) ) );
+ return 1;
+ }
else if( out_size > 0 )
{
const int wr = writeblock( outhandle, (char *)out_buffer, out_size );
if( wr != out_size )
{ pp(); show_error( "write error", errno ); return 1; }
}
- else if( in_size == 0 ) internal_error( "library error" );
+ else if( in_size == 0 ) internal_error( "library error (LZ_compress_read)" );
if( LZ_compress_member_finished( encoder ) )
{
if( LZ_compress_finished( encoder ) == 1 ) break;
partial_volume_size += LZ_compress_member_position( encoder );
- if( partial_volume_size >= volume_size - min_dictionary_size )
+ if( partial_volume_size >= volume_size - LZ_min_dictionary_size() )
{
partial_volume_size = 0;
if( delete_output_on_interrupt )
{
- close_and_set_permissions( in_statsp, retvalp );
+ close_and_set_permissions( in_statsp );
if( !next_filename() )
{ pp(); show_error( "too many volume files" ); return 1; }
if( !open_outstream( true ) ) return 1;
@@ -493,7 +466,13 @@ int compress( const long long member_size, const long long volume_size,
const long long size =
std::min( member_size, volume_size - partial_volume_size );
if( LZ_compress_restart_member( encoder, size ) < 0 )
- { pp(); show_error( "read error", errno ); return 1; }
+ {
+ pp();
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "LZ_compress_restart_member error: %s.\n",
+ LZ_strerror( LZ_compress_errno( encoder ) ) );
+ return 1;
+ }
}
}
@@ -511,51 +490,60 @@ int compress( const long long member_size, const long long volume_size,
100.0 * ( 1.0 - ( (double)out_size / in_size ) ),
in_size, out_size );
}
- LZ_compress_close( encoder );
return 0;
}
-int decompress( const int inhandle, const Pretty_print & pp,
- const bool testing )
+int compress( const long long member_size, const long long volume_size,
+ const lzma_options & encoder_options, const int inhandle,
+ const Pretty_print & pp, const struct stat * const in_statsp )
{
- void * decoder = LZ_decompress_open();
- if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+ LZ_Encoder * const encoder =
+ LZ_compress_open( encoder_options.dictionary_size,
+ encoder_options.match_len_limit,
+ std::min( member_size, volume_size ) );
+ int retval;
+
+ if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
{
- LZ_decompress_close( decoder );
- pp( "not enough memory. Find a machine with more memory" );
- return 1;
+ if( LZ_compress_errno( encoder ) == LZ_mem_error )
+ pp( "not enough memory. Try a smaller dictionary size" );
+ else
+ internal_error( "invalid argument to encoder" );
+ retval = 1;
}
- if( verbosity >= 1 ) pp();
+ else retval = do_compress( encoder, member_size, volume_size,
+ inhandle, pp, in_statsp );
+ LZ_compress_close( encoder );
+ return retval;
+ }
+
+int do_decompress( LZ_Decoder * const decoder, const int inhandle,
+ const Pretty_print & pp, const bool testing )
+ {
const int in_buffer_size = 65536, out_buffer_size = 8 * in_buffer_size;
uint8_t in_buffer[in_buffer_size], out_buffer[out_buffer_size];
- int in_pos = 0, in_stream_pos = 0;
- bool finished = false;
+
+ if( verbosity >= 1 ) pp();
while( true )
{
- int in_size = 0;
- if( !finished )
+ int in_size = std::min( LZ_decompress_write_size( decoder ), in_buffer_size );
+ if( in_size > 0 )
{
- if( in_stream_pos == 0 )
- in_stream_pos = readblock( inhandle, (char *)in_buffer, in_buffer_size );
- if( in_pos < in_stream_pos )
- {
- in_size = LZ_decompress_write( decoder, in_buffer + in_pos, in_stream_pos - in_pos );
- in_pos += in_size;
- }
- if( in_pos >= in_stream_pos )
- {
- if( in_stream_pos < in_buffer_size )
- { finished = true; LZ_decompress_finish( decoder ); }
- in_stream_pos = 0; in_pos = 0;
- }
+ const int max_in_size = in_size;
+ in_size = readblock( inhandle, (char *)in_buffer, max_in_size );
+ if( in_size != max_in_size && errno )
+ { pp(); show_error( "read error", errno ); return 1; }
+ if( in_size == 0 ) LZ_decompress_finish( decoder );
+ else if( in_size != LZ_decompress_write( decoder, in_buffer, in_size ) )
+ internal_error( "library error (LZ_decompress_write)" );
}
int out_size = LZ_decompress_read( decoder, out_buffer, out_buffer_size );
// std::fprintf( stderr, "%5d in_size, %6d out_size.\n", in_size, out_size );
if( out_size < 0 )
{
- const LZ_errno lz_errno = LZ_decompress_errno( decoder );
+ const LZ_Errno lz_errno = LZ_decompress_errno( decoder );
if( lz_errno == LZ_header_error )
{
if( LZ_decompress_total_out_size( decoder ) > 0 )
@@ -568,15 +556,18 @@ int decompress( const int inhandle, const Pretty_print & pp,
pp( "not enough memory. Find a machine with more memory" );
return 1;
}
+ pp();
if( lz_errno == LZ_unexpected_eof )
{
if( verbosity >= 0 )
- { pp();
- std::fprintf( stderr, "file ends unexpectedly at pos %lld\n",
- LZ_decompress_total_in_size( decoder ) ); }
+ std::fprintf( stderr, "file ends unexpectedly at pos %lld\n",
+ LZ_decompress_total_in_size( decoder ) );
return 2;
}
- pp(); show_error( "read error", errno ); return 1;
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "LZ_decompress_read error: %s.\n",
+ LZ_strerror( LZ_decompress_errno( decoder ) ) );
+ return 1;
}
else if( out_size > 0 && outhandle >= 0 )
{
@@ -585,17 +576,34 @@ int decompress( const int inhandle, const Pretty_print & pp,
{ pp(); show_error( "write error", errno ); return 1; }
}
if( LZ_decompress_finished( decoder ) == 1 ) break;
- if( finished && in_size == 0 && out_size == 0 )
- internal_error( "library error" );
+ if( in_size == 0 && out_size == 0 )
+ internal_error( "library error (LZ_decompress_read)" );
}
if( verbosity >= 1 )
{ if( testing ) std::fprintf( stderr, "ok\n" );
else std::fprintf( stderr, "done\n" ); }
- LZ_decompress_close( decoder );
return 0;
}
+int decompress( const int inhandle, const Pretty_print & pp,
+ const bool testing )
+ {
+ LZ_Decoder * const decoder = LZ_decompress_open();
+ int retval;
+
+ if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+ {
+ pp( "not enough memory. Find a machine with more memory" );
+ retval = 1;
+ }
+ else retval = do_decompress( decoder, inhandle, pp, testing );
+
+ LZ_decompress_close( decoder );
+ return retval;
+ }
+
+
extern "C" void signal_handler( int ) throw()
{
show_error( "Control-C or similar caught, quitting." );
@@ -775,7 +783,8 @@ int main( const int argc, const char * argv[] )
case 'h': show_help(); return 0;
case 'k': keep_input_files = true; break;
case 'm': encoder_options.match_len_limit =
- getnum( arg, 0, 5, 273 ); break;
+ getnum( arg, 0, LZ_min_match_len_limit(),
+ LZ_max_match_len_limit() ); break;
case 'o': default_output_filename = arg; break;
case 'q': verbosity = -1; break;
case 's': encoder_options.dictionary_size = get_dict_size( arg );
@@ -859,19 +868,19 @@ int main( const int argc, const char * argv[] )
if( output_filename.size() && !to_stdout && program_mode != m_test )
delete_output_on_interrupt = true;
- const struct stat * in_statsp = input_filename.size() ? &in_stats : 0;
+ const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0;
pp.set_name( input_filename );
int tmp = 0;
if( program_mode == m_compress )
tmp = compress( member_size, volume_size, encoder_options, inhandle,
- pp, in_statsp, &retval );
+ pp, in_statsp );
else
tmp = decompress( inhandle, pp, program_mode == m_test );
if( tmp > retval ) retval = tmp;
if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
if( delete_output_on_interrupt )
- close_and_set_permissions( in_statsp, &retval );
+ close_and_set_permissions( in_statsp );
if( input_filename.size() )
{
close( inhandle ); inhandle = -1;
@@ -879,6 +888,12 @@ int main( const int argc, const char * argv[] )
std::remove( input_filename.c_str() );
}
}
- if( outhandle >= 0 ) close( outhandle );
+ if( outhandle >= 0 && close( outhandle ) != 0 )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: Can't close stdout: %s.\n",
+ program_name, std::strerror( errno ) );
+ if( retval < 1 ) retval = 1;
+ }
return retval;
}
diff --git a/testsuite/check.sh b/testsuite/check.sh
index 62f9e49..e35876d 100755
--- a/testsuite/check.sh
+++ b/testsuite/check.sh
@@ -1,6 +1,6 @@
#! /bin/sh
# check script for Lzlib - A compression library for lzip files
-# Copyright (C) 2009 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010 Antonio Diaz Diaz.
#
# This script is free software: you have unlimited permission
# to copy, distribute and modify it.
@@ -20,13 +20,13 @@ fi
if [ -d tmp ] ; then rm -rf tmp ; fi
mkdir tmp
-echo -n "testing minilzip..."
+echo -n "testing lzlib..."
cd "${objdir}"/tmp
-cat "${testdir}"/../COPYING > in || framework_failure
+cat "${testdir}"/test1 > in || framework_failure
fail=0
-"${LZIP}" -cd "${testdir}"/COPYING.lz > copy || fail=1
+"${LZIP}" -cd "${testdir}"/test1.lz > copy || fail=1
cmp in copy || fail=1
for i in s4096 1 2 3 4 5 6 7 8; do
@@ -47,7 +47,7 @@ for i in s4096 1 2 3 4 5 6 7 8; do
done
for i in s4096 1 2 3 4 5 6 7 8; do
- "${LZIP}" -c -$i < in > out || fail=1
+ "${LZIP}" -$i < in > out || fail=1
"${LZIP}" -d < out > copy || fail=1
cmp in copy || fail=1
echo -n .
diff --git a/testsuite/test1 b/testsuite/test1
new file mode 100644
index 0000000..5b244d5
--- /dev/null
+++ b/testsuite/test1
@@ -0,0 +1,676 @@
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
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+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+ You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+ 11. Patents.
+
+ A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+ A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+ In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+ If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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 3 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
diff --git a/testsuite/COPYING.lz b/testsuite/test1.lz
index a09b1e8..a09b1e8 100644
--- a/testsuite/COPYING.lz
+++ b/testsuite/test1.lz
Binary files differ