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-rw-r--r--AUTHORS1
-rw-r--r--COPYING676
-rw-r--r--ChangeLog12
-rw-r--r--INSTALL56
-rw-r--r--Makefile.in105
-rw-r--r--NEWS5
-rw-r--r--README42
-rw-r--r--carg_parser.c292
-rw-r--r--carg_parser.h101
-rwxr-xr-xconfigure194
-rw-r--r--decoder.c248
-rw-r--r--decoder.h380
-rw-r--r--doc/lunzip.153
-rw-r--r--lunzip.h280
-rw-r--r--main.c657
-rwxr-xr-xtestsuite/check.sh76
-rw-r--r--testsuite/test.txt676
-rw-r--r--testsuite/test_v0.lzbin0 -> 11540 bytes
-rw-r--r--testsuite/test_v1.lzbin0 -> 11548 bytes
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diff --git a/AUTHORS b/AUTHORS
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index 0000000..fe4a97f
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1 @@
+Lunzip was written by Antonio Diaz Diaz.
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..4432540
--- /dev/null
+++ b/COPYING
@@ -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
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+ 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
new file mode 100644
index 0000000..838387e
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1,12 @@
+2010-12-17 Antonio Diaz Diaz <ant_diaz@teleline.es>
+
+ * Version 1.0-rc1 released.
+ * Initial release.
+ * Created from the decompression code of clzip 1.1-rc2.
+
+
+Copyright (C) 2010 Antonio Diaz Diaz.
+
+This file is a collection of facts, and thus it is not copyrightable,
+but just in case, you have unlimited permission to copy, distribute and
+modify it.
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..fdecdff
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,56 @@
+Requirements
+------------
+You will need a C compiler.
+I use gcc 4.3.5 and 3.3.6, but the code should compile with any
+standards compliant compiler.
+Gcc is available at http://gcc.gnu.org.
+
+
+Procedure
+---------
+1. Unpack the archive if you have not done so already:
+
+ lzip -cd lunzip[version].tar.lz | tar -xf -
+or
+ gzip -cd lunzip[version].tar.gz | tar -xf -
+
+This creates the directory ./lunzip[version] containing the source from
+the main archive.
+
+2. Change to lunzip directory and run configure.
+ (Try `configure --help' for usage instructions).
+
+ cd lunzip[version]
+ ./configure
+
+3. Run make.
+
+ make
+
+4. Optionally, type `make check' to run the tests that come with lunzip.
+
+5. Type `make install' to install the program and any data files and
+ documentation.
+
+
+Another way
+-----------
+You can also compile lunzip into a separate directory. To do this, you
+must use a version of `make' that supports the `VPATH' variable, such
+as GNU `make'. `cd' to the directory where you want the object files
+and executables to go and run the `configure' script. `configure'
+automatically checks for the source code in `.', in `..' and in the
+directory that `configure' is in.
+
+`configure' recognizes the option `--srcdir=DIR' to control where to
+look for the sources. Usually `configure' can determine that directory
+automatically.
+
+After running `configure', you can run `make' and `make install' as
+explained above.
+
+
+Copyright (C) 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
new file mode 100644
index 0000000..4880eb1
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,105 @@
+
+DISTNAME = $(pkgname)-$(pkgversion)
+INSTALL = install
+INSTALL_PROGRAM = $(INSTALL) -p -m 755
+INSTALL_DATA = $(INSTALL) -p -m 644
+INSTALL_DIR = $(INSTALL) -d -m 755
+SHELL = /bin/sh
+
+objs = carg_parser.o decoder.o main.o
+
+
+.PHONY : all install install-info install-man install-strip \
+ uninstall uninstall-info uninstall-man \
+ doc info man check dist clean distclean
+
+all : $(progname)
+
+$(progname) : $(objs)
+ $(CC) $(LDFLAGS) -o $@ $^
+
+$(progname)_profiled : $(objs)
+ $(CC) $(LDFLAGS) -pg -o $@ $^
+
+main.o : main.c
+ $(CC) $(CPPFLAGS) $(CFLAGS) -DPROGVERSION=\"$(pkgversion)\" -c -o $@ $<
+
+%.o : %.c
+ $(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
+
+$(objs) : Makefile
+carg_parser.o : carg_parser.h
+decoder.o : lunzip.h decoder.h
+main.o : carg_parser.h lunzip.h decoder.h
+
+
+doc : man
+
+info : $(VPATH)/doc/$(pkgname).info
+
+$(VPATH)/doc/$(pkgname).info : $(VPATH)/doc/$(pkgname).texinfo
+ cd $(VPATH)/doc && makeinfo $(pkgname).texinfo
+
+man : $(VPATH)/doc/$(progname).1
+
+$(VPATH)/doc/$(progname).1 : $(progname)
+ help2man -n 'small decompressor for lzip files' \
+ -o $@ --no-info ./$(progname)
+
+Makefile : $(VPATH)/configure $(VPATH)/Makefile.in
+ ./config.status
+
+check : all
+ @$(VPATH)/testsuite/check.sh $(VPATH)/testsuite $(pkgversion)
+
+install : all install-man
+ if [ ! -d "$(DESTDIR)$(bindir)" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(bindir)" ; fi
+ $(INSTALL_PROGRAM) ./$(progname) "$(DESTDIR)$(bindir)/$(progname)"
+
+install-info :
+ if [ ! -d "$(DESTDIR)$(infodir)" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(infodir)" ; fi
+ $(INSTALL_DATA) $(VPATH)/doc/$(pkgname).info "$(DESTDIR)$(infodir)/$(pkgname).info"
+ -install-info --info-dir="$(DESTDIR)$(infodir)" $(DESTDIR)$(infodir)/$(pkgname).info
+
+install-man :
+ if [ ! -d "$(DESTDIR)$(mandir)/man1" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(mandir)/man1" ; fi
+ $(INSTALL_DATA) $(VPATH)/doc/$(progname).1 "$(DESTDIR)$(mandir)/man1/$(progname).1"
+
+install-strip : all
+ $(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install
+
+uninstall : uninstall-man
+ -rm -f "$(DESTDIR)$(bindir)/$(progname)"
+
+uninstall-info :
+ -install-info --info-dir="$(DESTDIR)$(infodir)" --remove "$(DESTDIR)$(infodir)/$(pkgname).info"
+ -rm -f "$(DESTDIR)$(infodir)/$(pkgname).info"
+
+uninstall-man :
+ -rm -f "$(DESTDIR)$(mandir)/man1/$(progname).1"
+
+dist : doc
+ ln -sf $(VPATH) $(DISTNAME)
+ tar -cvf $(DISTNAME).tar \
+ $(DISTNAME)/AUTHORS \
+ $(DISTNAME)/COPYING \
+ $(DISTNAME)/ChangeLog \
+ $(DISTNAME)/INSTALL \
+ $(DISTNAME)/Makefile.in \
+ $(DISTNAME)/NEWS \
+ $(DISTNAME)/README \
+ $(DISTNAME)/configure \
+ $(DISTNAME)/doc/$(progname).1 \
+ $(DISTNAME)/testsuite/check.sh \
+ $(DISTNAME)/testsuite/test.txt \
+ $(DISTNAME)/testsuite/test_v[01].lz \
+ $(DISTNAME)/*.h \
+ $(DISTNAME)/*.c
+ rm -f $(DISTNAME)
+ lzip -v -9 $(DISTNAME).tar
+
+clean :
+ -rm -f $(progname) $(progname)_profiled $(objs)
+
+distclean : clean
+ -rm -f Makefile config.status *.tar *.tar.lz
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..3c9f549
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,5 @@
+Changes in version 1.0:
+
+Initial release.
+
+Created from the decompression code of clzip 1.1-rc2.
diff --git a/README b/README
new file mode 100644
index 0000000..4a5a621
--- /dev/null
+++ b/README
@@ -0,0 +1,42 @@
+Description
+
+Lunzip is a decompressor for lzip files. It is written in C and its
+small size makes it well suited for embedded devices or software
+installers that need to decompress files but do not need compression
+capabilities.
+
+Lunzip replaces every file given in the command line with a decompressed
+version of itself. Each decompressed file has the same modification
+date, permissions, and, when possible, ownership as the corresponding
+compressed file. Lunzip is able to read from some types of non regular
+files if the "--stdout" option is specified.
+
+Lunzip attempts to guess the name for the decompressed file from that of
+the compressed file as follows:
+
+filename.lz becomes filename
+filename.tlz becomes filename.tar
+anyothername becomes anyothername.out
+
+If no file names are specified, lunzip decompresses from standard input
+to standard output. In this case, lunzip will decline to read compressed
+input from a terminal.
+
+Lunzip will correctly decompress a file which is the concatenation of
+two or more compressed files. The result is the concatenation of the
+corresponding uncompressed files. Integrity testing of concatenated
+compressed files is also supported.
+
+The amount of memory required by lunzip to decompress a file is only a
+few tens of KiB larger than the dictionary size used to compress that
+file.
+
+
+Copyright (C) 2010 Antonio Diaz Diaz.
+
+This file is free documentation: you have unlimited permission to copy,
+distribute and modify it.
+
+The file Makefile.in is a data file used by configure to produce the
+Makefile. It has the same copyright owner and permissions that configure
+itself.
diff --git a/carg_parser.c b/carg_parser.c
new file mode 100644
index 0000000..ff14a87
--- /dev/null
+++ b/carg_parser.c
@@ -0,0 +1,292 @@
+/* Arg_parser - A POSIX/GNU command line argument parser. (C version)
+ Copyright (C) 2006, 2007, 2008, 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ 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 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 <stdlib.h>
+#include <string.h>
+
+#include "carg_parser.h"
+
+
+/* assure at least a minimum size for buffer `buf' */
+static void * ap_resize_buffer( void * buf, const int min_size )
+ {
+ if( buf ) buf = realloc( buf, min_size );
+ else buf = malloc( min_size );
+ return buf;
+ }
+
+
+static char push_back_record( struct Arg_parser * const ap,
+ const int code, const char * const argument )
+ {
+ const int len = strlen( argument );
+ struct ap_Record *p;
+ void * tmp = ap_resize_buffer( ap->data, ( ap->data_size + 1 ) * sizeof (struct ap_Record) );
+ if( !tmp ) return 0;
+ ap->data = (struct ap_Record *)tmp;
+ p = &(ap->data[ap->data_size]);
+ p->code = code;
+ p->argument = 0;
+ tmp = ap_resize_buffer( p->argument, len + 1 );
+ if( !tmp ) return 0;
+ p->argument = (char *)tmp;
+ strncpy( p->argument, argument, len + 1 );
+ ++ap->data_size;
+ return 1;
+ }
+
+
+static char add_error( struct Arg_parser * const ap, const char * const msg )
+ {
+ const int len = strlen( msg );
+ void * tmp = ap_resize_buffer( ap->error, ap->error_size + len + 1 );
+ if( !tmp ) return 0;
+ ap->error = (char *)tmp;
+ strncpy( ap->error + ap->error_size, msg, len + 1 );
+ ap->error_size += len;
+ return 1;
+ }
+
+
+static void free_data( struct Arg_parser * const ap )
+ {
+ int i;
+ for( i = 0; i < ap->data_size; ++i ) free( ap->data[i].argument );
+ if( ap->data ) { free( ap->data ); ap->data = 0; }
+ ap->data_size = 0;
+ }
+
+
+static char parse_long_option( struct Arg_parser * const ap,
+ const char * const opt, const char * const arg,
+ const struct ap_Option options[],
+ int * const argindp )
+ {
+ unsigned int len;
+ int index = -1;
+ int i;
+ char exact = 0, ambig = 0;
+
+ for( len = 0; opt[len+2] && opt[len+2] != '='; ++len ) ;
+
+ /* Test all long options for either exact match or abbreviated matches. */
+ for( i = 0; options[i].code != 0; ++i )
+ if( options[i].name && !strncmp( options[i].name, &opt[2], len ) )
+ {
+ if( strlen( options[i].name ) == len ) /* Exact match found */
+ { index = i; exact = 1; break; }
+ else if( index < 0 ) index = i; /* First nonexact match found */
+ else if( options[index].code != options[i].code ||
+ options[index].has_arg != options[i].has_arg )
+ ambig = 1; /* Second or later nonexact match found */
+ }
+
+ if( ambig && !exact )
+ {
+ add_error( ap, "option `" ); add_error( ap, opt );
+ add_error( ap, "' is ambiguous" );
+ return 1;
+ }
+
+ if( index < 0 ) /* nothing found */
+ {
+ add_error( ap, "unrecognized option `" ); add_error( ap, opt );
+ add_error( ap, "'" );
+ return 1;
+ }
+
+ ++*argindp;
+
+ if( opt[len+2] ) /* `--<long_option>=<argument>' syntax */
+ {
+ if( options[index].has_arg == ap_no )
+ {
+ add_error( ap, "option `--" ); add_error( ap, options[index].name );
+ add_error( ap, "' doesn't allow an argument" );
+ return 1;
+ }
+ if( options[index].has_arg == ap_yes && !opt[len+3] )
+ {
+ add_error( ap, "option `--" ); add_error( ap, options[index].name );
+ add_error( ap, "' requires an argument" );
+ return 1;
+ }
+ return push_back_record( ap, options[index].code, &opt[len+3] );
+ }
+
+ if( options[index].has_arg == ap_yes )
+ {
+ if( !arg || !arg[0] )
+ {
+ add_error( ap, "option `--" ); add_error( ap, options[index].name );
+ add_error( ap, "' requires an argument" );
+ return 1;
+ }
+ ++*argindp;
+ return push_back_record( ap, options[index].code, arg );
+ }
+
+ return push_back_record( ap, options[index].code, "" );
+ }
+
+
+static char parse_short_option( struct Arg_parser * const ap,
+ const char * const opt, const char * const arg,
+ const struct ap_Option options[],
+ int * const argindp )
+ {
+ int cind = 1; /* character index in opt */
+
+ while( cind > 0 )
+ {
+ int index = -1;
+ int i;
+ const unsigned char code = opt[cind];
+ char code_str[2];
+ code_str[0] = code; code_str[1] = 0;
+
+ if( code != 0 )
+ for( i = 0; options[i].code; ++i )
+ if( code == options[i].code )
+ { index = i; break; }
+
+ if( index < 0 )
+ {
+ add_error( ap, "invalid option -- " ); add_error( ap, code_str );
+ return 1;
+ }
+
+ if( opt[++cind] == 0 ) { ++*argindp; cind = 0; } /* opt finished */
+
+ if( options[index].has_arg != ap_no && cind > 0 && opt[cind] )
+ {
+ if( !push_back_record( ap, code, &opt[cind] ) ) return 0;
+ ++*argindp; cind = 0;
+ }
+ else if( options[index].has_arg == ap_yes )
+ {
+ if( !arg || !arg[0] )
+ {
+ add_error( ap, "option requires an argument -- " );
+ add_error( ap, code_str );
+ return 1;
+ }
+ ++*argindp; cind = 0;
+ if( !push_back_record( ap, code, arg ) ) return 0;
+ }
+ else if( !push_back_record( ap, code, "" ) ) return 0;
+ }
+ return 1;
+ }
+
+
+char ap_init( struct Arg_parser * const ap,
+ const int argc, const char * const argv[],
+ const struct ap_Option options[], const char in_order )
+ {
+ const char ** non_options = 0; /* skipped non-options */
+ int non_options_size = 0; /* number of skipped non-options */
+ int argind = 1; /* index in argv */
+ int i;
+
+ ap->data = 0;
+ ap->error = 0;
+ ap->data_size = 0;
+ ap->error_size = 0;
+ if( argc < 2 || !argv || !options ) return 1;
+
+ while( argind < argc )
+ {
+ const unsigned char ch1 = argv[argind][0];
+ const unsigned char ch2 = ( ch1 ? argv[argind][1] : 0 );
+
+ if( ch1 == '-' && ch2 ) /* we found an option */
+ {
+ const char * const opt = argv[argind];
+ const char * const arg = (argind + 1 < argc) ? argv[argind+1] : 0;
+ if( ch2 == '-' )
+ {
+ if( !argv[argind][2] ) { ++argind; break; } /* we found "--" */
+ else if( !parse_long_option( ap, opt, arg, options, &argind ) ) return 0;
+ }
+ else if( !parse_short_option( ap, opt, arg, options, &argind ) ) return 0;
+ if( ap->error ) break;
+ }
+ else
+ {
+ if( !in_order )
+ {
+ void * tmp = ap_resize_buffer( non_options,
+ ( non_options_size + 1 ) * sizeof *non_options );
+ if( !tmp ) return 0;
+ non_options = (const char **)tmp;
+ non_options[non_options_size++] = argv[argind++];
+ }
+ else if( !push_back_record( ap, 0, argv[argind++] ) ) return 0;
+ }
+ }
+ if( ap->error ) free_data( ap );
+ else
+ {
+ for( i = 0; i < non_options_size; ++i )
+ if( !push_back_record( ap, 0, non_options[i] ) ) return 0;
+ while( argind < argc )
+ if( !push_back_record( ap, 0, argv[argind++] ) ) return 0;
+ }
+ if( non_options ) free( non_options );
+ return 1;
+ }
+
+
+void ap_free( struct Arg_parser * const ap )
+ {
+ free_data( ap );
+ if( ap->error ) { free( ap->error ); ap->error = 0; }
+ ap->error_size = 0;
+ }
+
+
+const char * ap_error( const struct Arg_parser * const ap )
+ { return ap->error; }
+
+
+int ap_arguments( const struct Arg_parser * const ap )
+ { return ap->data_size; }
+
+
+int ap_code( const struct Arg_parser * const ap, const int i )
+ {
+ if( i >= 0 && i < ap_arguments( ap ) ) return ap->data[i].code;
+ else return 0;
+ }
+
+
+const char * ap_argument( const struct Arg_parser * const ap, const int i )
+ {
+ if( i >= 0 && i < ap_arguments( ap ) ) return ap->data[i].argument;
+ else return "";
+ }
diff --git a/carg_parser.h b/carg_parser.h
new file mode 100644
index 0000000..4dccb5f
--- /dev/null
+++ b/carg_parser.h
@@ -0,0 +1,101 @@
+/* Arg_parser - A POSIX/GNU command line argument parser. (C version)
+ Copyright (C) 2006, 2007, 2008, 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ 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 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
+ option codes, option arguments and non-option arguments.
+
+ In case of error, `ap_error' returns a non-null pointer to an error
+ message.
+
+ `options' is an array of `struct ap_Option' terminated by an element
+ containing a code which is zero. A null name means a short-only
+ option. A code value outside the unsigned char range means a
+ long-only option.
+
+ Arg_parser normally makes it appear as if all the option arguments
+ were specified before all the non-option arguments for the purposes
+ of parsing, even if the user of your program intermixed option and
+ non-option arguments. If you want the arguments in the exact order
+ the user typed them, call `ap_init' with `in_order' = true.
+
+ The argument `--' terminates all options; any following arguments are
+ treated as non-option arguments, even if they begin with a hyphen.
+
+ The syntax for optional option arguments is `-<short_option><argument>'
+ (without whitespace), or `--<long_option>=<argument>'.
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum ap_Has_arg { ap_no, ap_yes, ap_maybe };
+
+struct ap_Option
+ {
+ int code; /* Short option letter or code ( code != 0 ) */
+ const char * name; /* Long option name (maybe null) */
+ enum ap_Has_arg has_arg;
+ };
+
+
+struct ap_Record
+ {
+ int code;
+ char * argument;
+ };
+
+
+struct Arg_parser
+ {
+ struct ap_Record * data;
+ char * error;
+ int data_size;
+ int error_size;
+ };
+
+
+char ap_init( struct Arg_parser * const ap,
+ const int argc, const char * const argv[],
+ const struct ap_Option options[], const char in_order );
+
+void ap_free( struct Arg_parser * const ap );
+
+const char * ap_error( const struct Arg_parser * const ap );
+
+ /* The number of arguments parsed (may be different from argc) */
+int ap_arguments( const struct Arg_parser * const ap );
+
+ /* If ap_code( i ) is 0, ap_argument( i ) is a non-option.
+ Else ap_argument( i ) is the option's argument (or empty). */
+int ap_code( const struct Arg_parser * const ap, const int i );
+
+const char * ap_argument( const struct Arg_parser * const ap, const int i );
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/configure b/configure
new file mode 100755
index 0000000..a7b8339
--- /dev/null
+++ b/configure
@@ -0,0 +1,194 @@
+#! /bin/sh
+# configure script for Lunzip - Decompressor for lzip files
+# Copyright (C) 2010 Antonio Diaz Diaz.
+#
+# This configure script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+#
+# Date of this version: 2010-12-17
+
+args=
+no_create=
+pkgname=lunzip
+pkgversion=1.0-rc1
+progname=lunzip
+srctrigger=lunzip.h
+
+# clear some things potentially inherited from environment.
+LC_ALL=C
+export LC_ALL
+srcdir=
+prefix=/usr/local
+exec_prefix='$(prefix)'
+bindir='$(exec_prefix)/bin'
+datadir='$(prefix)/share'
+infodir='$(datadir)/info'
+mandir='$(datadir)/man'
+sysconfdir='$(prefix)/etc'
+CC=
+CPPFLAGS=
+CFLAGS='-Wall -W -O2'
+LDFLAGS=
+
+# Loop over all args
+while [ -n "$1" ] ; do
+
+ # Get the first arg, and shuffle
+ option=$1
+ shift
+
+ # Add the argument quoted to args
+ args="${args} \"${option}\""
+
+ # Split out the argument for options that take them
+ case ${option} in
+ *=*) optarg=`echo ${option} | sed -e 's,^[^=]*=,,'` ;;
+ esac
+
+ # Process the options
+ case ${option} in
+ --help | --he* | -h)
+ echo "Usage: configure [options]"
+ echo
+ echo "Options: [defaults in brackets]"
+ echo " -h, --help display this help and exit"
+ echo " -V, --version output version information and exit"
+ echo " --srcdir=DIR find the sources in DIR [. or ..]"
+ echo " --prefix=DIR install into DIR [${prefix}]"
+ echo " --exec-prefix=DIR base directory for arch-dependent files [${exec_prefix}]"
+ echo " --bindir=DIR user executables directory [${bindir}]"
+ echo " --datadir=DIR base directory for doc and data [${datadir}]"
+ echo " --infodir=DIR info files directory [${infodir}]"
+ echo " --mandir=DIR man pages directory [${mandir}]"
+ echo " --sysconfdir=DIR read-only single-machine data directory [${sysconfdir}]"
+ echo " CC=COMPILER C compiler to use [gcc]"
+ echo " CPPFLAGS=OPTIONS command line options for the preprocessor [${CPPFLAGS}]"
+ echo " CFLAGS=OPTIONS command line options for the C compiler [${CFLAGS}]"
+ echo " LDFLAGS=OPTIONS command line options for the linker [${LDFLAGS}]"
+ echo
+ exit 0 ;;
+ --version | --ve* | -V)
+ echo "Configure script for ${pkgname} version ${pkgversion}"
+ exit 0 ;;
+ --srcdir* | --sr*)
+ srcdir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --prefix* | --pr*)
+ prefix=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --exec-prefix* | --ex*)
+ exec_prefix=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --bindir* | --bi*)
+ bindir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --datadir* | --da*)
+ datadir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --infodir* | --inf*)
+ infodir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --mandir* | --ma*)
+ mandir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --sysconfdir* | --sy*)
+ sysconfdir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+ --no-create | --no-c*)
+ no_create=yes ;;
+
+ CC=*) CC=${optarg} ;;
+ CPPFLAGS=*) CPPFLAGS=${optarg} ;;
+ CFLAGS=*) CFLAGS=${optarg} ;;
+ LDFLAGS=*) LDFLAGS=${optarg} ;;
+
+ --* | *=* | *-*-*) ;;
+ *)
+ echo "configure: Unrecognized option: \"${option}\"; use --help for usage." 1>&2
+ exit 1 ;;
+ esac
+done
+
+# Find the source files, if location was not specified.
+srcdirtext=
+if [ -z "${srcdir}" ] ; then
+ srcdirtext="or . or .." ; srcdir=.
+ if [ ! -r ${srcdir}/${srctrigger} ] ; then srcdir=.. ; fi
+ if [ ! -r ${srcdir}/${srctrigger} ] ; then
+ ## the sed command below emulates the dirname command
+ srcdir=`echo $0 | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+ fi
+fi
+
+if [ ! -r ${srcdir}/${srctrigger} ] ; then
+ exec 1>&2
+ echo
+ echo "configure: Can't find sources in ${srcdir} ${srcdirtext}"
+ echo "configure: (At least ${srctrigger} is missing)."
+ exit 1
+fi
+
+# Set srcdir to . if that's what it is.
+if [ "`pwd`" = "`cd ${srcdir} ; pwd`" ] ; then srcdir=. ; fi
+
+# checking whether we are using GNU C.
+if [ -z "${CC}" ] ; 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
+
+echo
+if [ -z "${no_create}" ] ; then
+ echo "creating config.status"
+ rm -f config.status
+ cat > config.status << EOF
+#! /bin/sh
+# This file was generated automatically by configure. Do not edit.
+# Run this file to recreate the current configuration.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+exec /bin/sh $0 ${args} --no-create
+EOF
+ chmod +x config.status
+fi
+
+echo "creating Makefile"
+echo "VPATH = ${srcdir}"
+echo "prefix = ${prefix}"
+echo "exec_prefix = ${exec_prefix}"
+echo "bindir = ${bindir}"
+echo "datadir = ${datadir}"
+echo "infodir = ${infodir}"
+echo "mandir = ${mandir}"
+echo "sysconfdir = ${sysconfdir}"
+echo "CC = ${CC}"
+echo "CPPFLAGS = ${CPPFLAGS}"
+echo "CFLAGS = ${CFLAGS}"
+echo "LDFLAGS = ${LDFLAGS}"
+rm -f Makefile
+cat > Makefile << EOF
+# Makefile for Lunzip - Decompressor for lzip files
+# Copyright (C) 2010 Antonio Diaz Diaz.
+# This file was generated automatically by configure. Do not edit.
+#
+# This Makefile is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+pkgname = ${pkgname}
+pkgversion = ${pkgversion}
+progname = ${progname}
+VPATH = ${srcdir}
+prefix = ${prefix}
+exec_prefix = ${exec_prefix}
+bindir = ${bindir}
+datadir = ${datadir}
+infodir = ${infodir}
+mandir = ${mandir}
+sysconfdir = ${sysconfdir}
+CC = ${CC}
+CPPFLAGS = ${CPPFLAGS}
+CFLAGS = ${CFLAGS}
+LDFLAGS = ${LDFLAGS}
+EOF
+cat ${srcdir}/Makefile.in >> Makefile
+
+echo "OK. Now you can run make."
diff --git a/decoder.c b/decoder.c
new file mode 100644
index 0000000..e6af722
--- /dev/null
+++ b/decoder.c
@@ -0,0 +1,248 @@
+/* Lunzip - Decompressor for lzip files
+ Copyright (C) 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
+ 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/>.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lunzip.h"
+#include "decoder.h"
+
+
+CRC32 crc32;
+
+bool Rd_read_block( struct Range_decoder * const rdec )
+ {
+ if( !rdec->at_stream_end )
+ {
+ rdec->stream_pos = readblock( rdec->infd, rdec->buffer, rd_buffer_size );
+ if( rdec->stream_pos != rd_buffer_size && errno )
+ { show_error( "Read error", errno, false ); cleanup_and_fail( 1 ); }
+ rdec->at_stream_end = ( rdec->stream_pos < rd_buffer_size );
+ rdec->partial_member_pos += rdec->pos;
+ rdec->pos = 0;
+ }
+ return rdec->pos < rdec->stream_pos;
+ }
+
+
+void LZd_flush_data( struct LZ_decoder * const decoder )
+ {
+ const int size = decoder->pos - decoder->stream_pos;
+ if( size > 0 )
+ {
+ CRC32_update_buf( &decoder->crc_, decoder->buffer + decoder->stream_pos, size );
+ if( decoder->outfd >= 0 &&
+ writeblock( decoder->outfd, decoder->buffer + decoder->stream_pos, size ) != size )
+ { show_error( "write error", errno, false ); cleanup_and_fail( 1 ); }
+ if( decoder->pos >= decoder->buffer_size )
+ { decoder->partial_data_pos += decoder->pos; decoder->pos = 0; }
+ decoder->stream_pos = decoder->pos;
+ }
+ }
+
+
+bool LZd_verify_trailer( struct LZ_decoder * const decoder,
+ struct Pretty_print * const pp )
+ {
+ int i;
+ File_trailer trailer;
+ const int trailer_size = Ft_versioned_size( decoder->member_version );
+ const long long member_size =
+ Rd_member_position( decoder->range_decoder ) + trailer_size;
+ bool error = false;
+
+ for( i = 0; i < trailer_size && !error; ++i )
+ {
+ if( !Rd_finished( decoder->range_decoder ) )
+ trailer[i] = Rd_get_byte( decoder->range_decoder );
+ else
+ {
+ error = true;
+ if( pp->verbosity >= 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ fprintf( stderr, "Trailer truncated at trailer position %d;"
+ " some checks may fail.\n", i );
+ }
+ for( ; i < trailer_size; ++i ) trailer[i] = 0;
+ }
+ }
+ if( decoder->member_version == 0 ) Ft_set_member_size( trailer, member_size );
+ if( !Rd_code_is_zero( decoder->range_decoder ) )
+ {
+ error = true;
+ Pp_show_msg( pp, "Range decoder final code is not zero" );
+ }
+ if( Ft_get_data_crc( trailer ) != LZd_crc( decoder ) )
+ {
+ error = true;
+ if( pp->verbosity >= 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ fprintf( stderr, "CRC mismatch; trailer says %08X, data CRC is %08X.\n",
+ (unsigned int)Ft_get_data_crc( trailer ),
+ (unsigned int)LZd_crc( decoder ) );
+ }
+ }
+ if( Ft_get_data_size( trailer ) != LZd_data_position( decoder ) )
+ {
+ error = true;
+ if( pp->verbosity >= 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ fprintf( stderr, "Data size mismatch; trailer says %lld, data size is %lld (0x%llX).\n",
+ Ft_get_data_size( trailer ), LZd_data_position( decoder ), LZd_data_position( decoder ) );
+ }
+ }
+ if( Ft_get_member_size( trailer ) != member_size )
+ {
+ error = true;
+ if( pp->verbosity >= 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ fprintf( stderr, "Member size mismatch; trailer says %lld, member size is %lld (0x%llX).\n",
+ Ft_get_member_size( trailer ), member_size, member_size );
+ }
+ }
+ if( !error && pp->verbosity >= 4 && LZd_data_position( decoder ) > 0 && member_size > 0 )
+ fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ",
+ (double)LZd_data_position( decoder ) / member_size,
+ ( 8.0 * member_size ) / LZd_data_position( decoder ),
+ 100.0 * ( 1.0 - ( (double)member_size / LZd_data_position( decoder ) ) ) );
+ if( !error && pp->verbosity >= 3 )
+ fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld. ",
+ (unsigned int)Ft_get_data_crc( trailer ),
+ Ft_get_data_size( trailer ), Ft_get_member_size( trailer ) );
+ return !error;
+ }
+
+
+/* Return value: 0 = OK, 1 = decoder error, 2 = unexpected EOF,
+ 3 = trailer error, 4 = unknown marker found. */
+int LZd_decode_member( struct LZ_decoder * const decoder,
+ struct Pretty_print * const pp )
+ {
+ unsigned int rep0 = 0; /* rep[0-3] latest four distances */
+ unsigned int rep1 = 0; /* used for efficient coding of */
+ unsigned int rep2 = 0; /* repeated distances */
+ unsigned int rep3 = 0;
+ State state = 0;
+ Rd_load( decoder->range_decoder );
+
+ while( true )
+ {
+ const int pos_state = LZd_data_position( decoder ) & pos_state_mask;
+ if( Rd_finished( decoder->range_decoder ) )
+ { LZd_flush_data( decoder ); return 2; }
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_match[state][pos_state] ) == 0 )
+ {
+ const uint8_t prev_byte = LZd_get_prev_byte( decoder );
+ if( St_is_char( state ) )
+ LZd_put_byte( decoder, Lid_decode( &decoder->literal_decoder,
+ decoder->range_decoder, prev_byte ) );
+ else
+ LZd_put_byte( decoder, Lid_decode_matched( &decoder->literal_decoder,
+ decoder->range_decoder, prev_byte, LZd_get_byte( decoder, rep0 ) ) );
+ St_set_char( &state );
+ }
+ else
+ {
+ int len;
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep[state] ) == 1 )
+ {
+ len = 0;
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep0[state] ) == 1 )
+ {
+ unsigned int distance;
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep1[state] ) == 0 )
+ distance = rep1;
+ else
+ {
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep2[state] ) == 0 )
+ distance = rep2;
+ else { distance = rep3; rep3 = rep2; }
+ rep2 = rep1;
+ }
+ rep1 = rep0;
+ rep0 = distance;
+ }
+ else
+ {
+ if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_len[state][pos_state] ) == 0 )
+ { St_set_short_rep( &state ); len = 1; }
+ }
+ if( len == 0 )
+ {
+ St_set_rep( &state );
+ len = min_match_len + Led_decode( &decoder->rep_match_len_decoder, decoder->range_decoder, pos_state );
+ }
+ }
+ else
+ {
+ int dis_slot;
+ const unsigned int rep0_saved = rep0;
+ len = min_match_len + Led_decode( &decoder->len_decoder, decoder->range_decoder, pos_state );
+ dis_slot = Rd_decode_tree( decoder->range_decoder, decoder->bm_dis_slot[get_dis_state(len)], dis_slot_bits );
+ if( dis_slot < start_dis_model ) rep0 = dis_slot;
+ else
+ {
+ const int direct_bits = ( dis_slot >> 1 ) - 1;
+ rep0 = ( 2 | ( dis_slot & 1 ) ) << direct_bits;
+ if( dis_slot < end_dis_model )
+ rep0 += Rd_decode_tree_reversed( decoder->range_decoder, decoder->bm_dis + rep0 - dis_slot, direct_bits );
+ else
+ {
+ rep0 += Rd_decode( decoder->range_decoder, direct_bits - dis_align_bits ) << dis_align_bits;
+ rep0 += Rd_decode_tree_reversed( decoder->range_decoder, decoder->bm_align, dis_align_bits );
+ if( rep0 == 0xFFFFFFFFU ) /* Marker found */
+ {
+ rep0 = rep0_saved;
+ Rd_normalize( decoder->range_decoder );
+ LZd_flush_data( decoder );
+ if( len == min_match_len ) /* End Of Stream marker */
+ {
+ if( LZd_verify_trailer( decoder, pp ) ) return 0; else return 3;
+ }
+ if( len == min_match_len + 1 ) /* Sync Flush marker */
+ {
+ Rd_load( decoder->range_decoder ); continue;
+ }
+ if( pp->verbosity >= 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ fprintf( stderr, "Unsupported marker code `%d'.\n", len );
+ }
+ return 4;
+ }
+ }
+ }
+ rep3 = rep2; rep2 = rep1; rep1 = rep0_saved;
+ St_set_match( &state );
+ if( rep0 >= (unsigned int)decoder->dictionary_size ||
+ ( rep0 >= (unsigned int)decoder->pos && !decoder->partial_data_pos ) )
+ { LZd_flush_data( decoder ); return 1; }
+ }
+ LZd_copy_block( decoder, rep0, len );
+ }
+ }
+ }
diff --git a/decoder.h b/decoder.h
new file mode 100644
index 0000000..efb9472
--- /dev/null
+++ b/decoder.h
@@ -0,0 +1,380 @@
+/* Lunzip - Decompressor for lzip files
+ Copyright (C) 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
+ 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/>.
+*/
+
+enum { rd_buffer_size = 16384 };
+
+struct Range_decoder
+ {
+ long long partial_member_pos;
+ uint8_t * buffer; /* input buffer */
+ int pos; /* current pos in buffer */
+ int stream_pos; /* when reached, a new block must be read */
+ uint32_t code;
+ uint32_t range;
+ int infd; /* input file descriptor */
+ bool at_stream_end;
+ };
+
+bool Rd_read_block( struct Range_decoder * const rdec );
+
+static inline void Rd_init( struct Range_decoder * const rdec, const int ifd )
+ {
+ rdec->partial_member_pos = 0;
+ rdec->buffer = (uint8_t *)malloc( rd_buffer_size );
+ if( !rdec->buffer )
+ {
+ show_error( "Not enough memory. Find a machine with more memory.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+ rdec->pos = 0;
+ rdec->stream_pos = 0;
+ rdec->code = 0;
+ rdec->range = 0xFFFFFFFFU;
+ rdec->infd = ifd;
+ rdec->at_stream_end = false;
+ }
+
+static inline void Rd_free( struct Range_decoder * const rdec )
+ { free( rdec->buffer ); rdec->buffer = 0; }
+
+static inline bool Rd_code_is_zero( struct Range_decoder * const rdec )
+ { return ( rdec->code == 0 ); }
+
+static inline bool Rd_finished( struct Range_decoder * const rdec )
+ { return rdec->pos >= rdec->stream_pos && !Rd_read_block( rdec ); }
+
+static inline long long Rd_member_position( struct Range_decoder * const rdec )
+ { return rdec->partial_member_pos + rdec->pos; }
+
+static inline void Rd_reset_member_position( struct Range_decoder * const rdec )
+ { rdec->partial_member_pos = -rdec->pos; }
+
+static inline uint8_t Rd_get_byte( struct Range_decoder * const rdec )
+ {
+ if( Rd_finished( rdec ) ) return 0;
+ return rdec->buffer[rdec->pos++];
+ }
+
+static inline void Rd_load( struct Range_decoder * const rdec )
+ {
+ int i;
+ rdec->code = 0;
+ rdec->range = 0xFFFFFFFFU;
+ for( i = 0; i < 5; ++i )
+ rdec->code = (rdec->code << 8) | Rd_get_byte( rdec );
+ }
+
+static inline void Rd_normalize( struct Range_decoder * const rdec )
+ {
+ if( rdec->range <= 0x00FFFFFFU )
+ {
+ rdec->range <<= 8;
+ rdec->code = (rdec->code << 8) | Rd_get_byte( rdec );
+ }
+ }
+
+static inline int Rd_decode( struct Range_decoder * const rdec,
+ const int num_bits )
+ {
+ int symbol = 0;
+ int i;
+ for( i = num_bits; i > 0; --i )
+ {
+ symbol <<= 1;
+ if( rdec->range <= 0x00FFFFFFU )
+ {
+ rdec->range <<= 7;
+ rdec->code = (rdec->code << 8) | Rd_get_byte( rdec );
+ if( rdec->code >= rdec->range )
+ { rdec->code -= rdec->range; symbol |= 1; }
+ }
+ else
+ {
+ rdec->range >>= 1;
+ if( rdec->code >= rdec->range )
+ { rdec->code -= rdec->range; symbol |= 1; }
+ }
+ }
+ return symbol;
+ }
+
+static inline int Rd_decode_bit( struct Range_decoder * const rdec,
+ Bit_model * const probability )
+ {
+ uint32_t bound;
+ Rd_normalize( rdec );
+ bound = ( rdec->range >> bit_model_total_bits ) * *probability;
+ if( rdec->code < bound )
+ {
+ rdec->range = bound;
+ *probability += (bit_model_total - *probability) >> bit_model_move_bits;
+ return 0;
+ }
+ else
+ {
+ rdec->range -= bound;
+ rdec->code -= bound;
+ *probability -= *probability >> bit_model_move_bits;
+ return 1;
+ }
+ }
+
+static inline int Rd_decode_tree( struct Range_decoder * const rdec,
+ Bit_model bm[], const int num_bits )
+ {
+ int model = 1;
+ int i;
+ for( i = num_bits; i > 0; --i )
+ model = ( model << 1 ) | Rd_decode_bit( rdec, &bm[model] );
+ return model - (1 << num_bits);
+ }
+
+static inline int Rd_decode_tree_reversed( struct Range_decoder * const rdec,
+ Bit_model bm[], const int num_bits )
+ {
+ int model = 1;
+ int symbol = 0;
+ int i;
+ for( i = 0; i < num_bits; ++i )
+ {
+ const int bit = Rd_decode_bit( rdec, &bm[model] );
+ model <<= 1;
+ if( bit ) { model |= 1; symbol |= (1 << i); }
+ }
+ return symbol;
+ }
+
+static inline int Rd_decode_matched( struct Range_decoder * const rdec,
+ Bit_model bm[], const int match_byte )
+ {
+ Bit_model * const bm1 = bm + 0x100;
+ int symbol = 1;
+ int i;
+ for( i = 7; i >= 0; --i )
+ {
+ const int match_bit = ( match_byte >> i ) & 1;
+ const int bit = Rd_decode_bit( rdec, &bm1[(match_bit<<8)+symbol] );
+ symbol = ( symbol << 1 ) | bit;
+ if( match_bit != bit )
+ {
+ while( --i >= 0 )
+ symbol = ( symbol << 1 ) | Rd_decode_bit( rdec, &bm[symbol] );
+ break;
+ }
+ }
+ return symbol & 0xFF;
+ }
+
+
+struct Len_decoder
+ {
+ Bit_model choice1;
+ Bit_model choice2;
+ Bit_model bm_low[pos_states][len_low_symbols];
+ Bit_model bm_mid[pos_states][len_mid_symbols];
+ Bit_model bm_high[len_high_symbols];
+ };
+
+static inline void Led_init( struct Len_decoder * const len_decoder )
+ {
+ int i, j;
+ Bm_init( &len_decoder->choice1 );
+ Bm_init( &len_decoder->choice2 );
+ for( i = 0; i < pos_states; ++i )
+ for( j = 0; j < len_low_symbols; ++j )
+ Bm_init( &len_decoder->bm_low[i][j] );
+ for( i = 0; i < pos_states; ++i )
+ for( j = 0; j < len_mid_symbols; ++j )
+ Bm_init( &len_decoder->bm_mid[i][j] );
+ for( i = 0; i < len_high_symbols; ++i )
+ Bm_init( &len_decoder->bm_high[i] );
+ }
+
+static inline int Led_decode( struct Len_decoder * const len_decoder,
+ struct Range_decoder * const rdec,
+ const int pos_state )
+ {
+ if( Rd_decode_bit( rdec, &len_decoder->choice1 ) == 0 )
+ return Rd_decode_tree( rdec, len_decoder->bm_low[pos_state], len_low_bits );
+ if( Rd_decode_bit( rdec, &len_decoder->choice2 ) == 0 )
+ return len_low_symbols +
+ Rd_decode_tree( rdec, len_decoder->bm_mid[pos_state], len_mid_bits );
+ return len_low_symbols + len_mid_symbols +
+ Rd_decode_tree( rdec, len_decoder->bm_high, len_high_bits );
+ }
+
+
+struct Literal_decoder
+ {
+ Bit_model bm_literal[1<<literal_context_bits][0x300];
+ };
+
+static inline void Lid_init( struct Literal_decoder * const literal_decoder )
+ {
+ int i, j;
+ for( i = 0; i < 1<<literal_context_bits; ++i )
+ for( j = 0; j < 0x300; ++j )
+ Bm_init( &literal_decoder->bm_literal[i][j] );
+ }
+
+static inline int Lid_state( const int prev_byte )
+ { return ( prev_byte >> ( 8 - literal_context_bits ) ); }
+
+static inline uint8_t Lid_decode( struct Literal_decoder * const literal_decoder,
+ struct Range_decoder * const rdec,
+ const uint8_t prev_byte )
+ { return Rd_decode_tree( rdec, literal_decoder->bm_literal[Lid_state(prev_byte)], 8 ); }
+
+static inline uint8_t Lid_decode_matched( struct Literal_decoder * const literal_decoder,
+ struct Range_decoder * const rdec,
+ const uint8_t prev_byte,
+ const uint8_t match_byte )
+ { return Rd_decode_matched( rdec, literal_decoder->bm_literal[Lid_state(prev_byte)], match_byte ); }
+
+
+struct LZ_decoder
+ {
+ long long partial_data_pos;
+ int dictionary_size;
+ int buffer_size;
+ uint8_t * buffer; /* output buffer */
+ int pos; /* current pos in buffer */
+ int stream_pos; /* first byte not yet written to file */
+ uint32_t crc_;
+ int outfd; /* output file descriptor */
+ int member_version;
+
+ Bit_model bm_match[states][pos_states];
+ Bit_model bm_rep[states];
+ Bit_model bm_rep0[states];
+ Bit_model bm_rep1[states];
+ Bit_model bm_rep2[states];
+ Bit_model bm_len[states][pos_states];
+ Bit_model bm_dis_slot[max_dis_states][1<<dis_slot_bits];
+ Bit_model bm_dis[modeled_distances-end_dis_model+1];
+ Bit_model bm_align[dis_align_size];
+
+ struct Range_decoder * range_decoder;
+ struct Len_decoder len_decoder;
+ struct Len_decoder rep_match_len_decoder;
+ struct Literal_decoder literal_decoder;
+ };
+
+void LZd_flush_data( struct LZ_decoder * const decoder );
+
+bool LZd_verify_trailer( struct LZ_decoder * const decoder,
+ struct Pretty_print * const pp );
+
+static inline uint8_t LZd_get_prev_byte( struct LZ_decoder * const decoder )
+ {
+ const int i =
+ ( ( decoder->pos > 0 ) ? decoder->pos : decoder->buffer_size ) - 1;
+ return decoder->buffer[i];
+ }
+
+static inline uint8_t LZd_get_byte( struct LZ_decoder * const decoder,
+ const int distance )
+ {
+ int i = decoder->pos - distance - 1;
+ if( i < 0 ) i += decoder->buffer_size;
+ return decoder->buffer[i];
+ }
+
+static inline void LZd_put_byte( struct LZ_decoder * const decoder,
+ const uint8_t b )
+ {
+ decoder->buffer[decoder->pos] = b;
+ if( ++decoder->pos >= decoder->buffer_size ) LZd_flush_data( decoder );
+ }
+
+static inline void LZd_copy_block( struct LZ_decoder * const decoder,
+ const int distance, int len )
+ {
+ int i = decoder->pos - distance - 1;
+ if( i < 0 ) i += decoder->buffer_size;
+ if( len < decoder->buffer_size - max( decoder->pos, i ) &&
+ len <= abs( decoder->pos - i ) )
+ {
+ memcpy( decoder->buffer + decoder->pos, decoder->buffer + i, len );
+ decoder->pos += len;
+ }
+ else for( ; len > 0 ; --len )
+ {
+ decoder->buffer[decoder->pos] = decoder->buffer[i];
+ if( ++decoder->pos >= decoder->buffer_size ) LZd_flush_data( decoder );
+ if( ++i >= decoder->buffer_size ) i = 0;
+ }
+ }
+
+static inline void LZd_init( struct LZ_decoder * const decoder,
+ const File_header header,
+ struct Range_decoder * const rdec, const int ofd )
+ {
+ int i, j;
+ decoder->partial_data_pos = 0;
+ decoder->dictionary_size = Fh_get_dictionary_size( header );
+ decoder->buffer_size = max( 65536, decoder->dictionary_size );
+ decoder->buffer = (uint8_t *)malloc( decoder->buffer_size );
+ if( !decoder->buffer )
+ {
+ show_error( "Not enough memory. Find a machine with more memory.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+ decoder->pos = 0;
+ decoder->stream_pos = 0;
+ decoder->crc_ = 0xFFFFFFFFU;
+ decoder->outfd = ofd;
+ decoder->member_version = Fh_version( header );
+
+ for( i = 0; i < states; ++i )
+ {
+ for( j = 0; j < pos_states; ++j )
+ {
+ Bm_init( &decoder->bm_match[i][j] );
+ Bm_init( &decoder->bm_len[i][j] );
+ }
+ Bm_init( &decoder->bm_rep[i] );
+ Bm_init( &decoder->bm_rep0[i] );
+ Bm_init( &decoder->bm_rep1[i] );
+ Bm_init( &decoder->bm_rep2[i] );
+ }
+ for( i = 0; i < max_dis_states; ++i )
+ for( j = 0; j < 1<<dis_slot_bits; ++j )
+ Bm_init( &decoder->bm_dis_slot[i][j] );
+ for( i = 0; i < modeled_distances-end_dis_model+1; ++i )
+ Bm_init( &decoder->bm_dis[i] );
+ for( i = 0; i < dis_align_size; ++i )
+ Bm_init( &decoder->bm_align[i] );
+
+ decoder->range_decoder = rdec;
+ Led_init( &decoder->len_decoder );
+ Led_init( &decoder->rep_match_len_decoder );
+ Lid_init( &decoder->literal_decoder );
+ decoder->buffer[decoder->buffer_size-1] = 0; /* prev_byte of first_byte */
+ }
+
+static inline void LZd_free( struct LZ_decoder * const decoder )
+ { free( decoder->buffer ); decoder->buffer = 0; }
+
+static inline uint32_t LZd_crc( struct LZ_decoder * const decoder )
+ { return decoder->crc_ ^ 0xFFFFFFFFU; }
+
+static inline long long LZd_data_position( struct LZ_decoder * const decoder )
+ { return decoder->partial_data_pos + decoder->pos; }
+
+int LZd_decode_member( struct LZ_decoder * const decoder,
+ struct Pretty_print * const pp );
diff --git a/doc/lunzip.1 b/doc/lunzip.1
new file mode 100644
index 0000000..c8e20df
--- /dev/null
+++ b/doc/lunzip.1
@@ -0,0 +1,53 @@
+.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.37.1.
+.TH LUNZIP "1" "December 2010" "Lunzip 1.0-rc1" "User Commands"
+.SH NAME
+Lunzip \- small decompressor for lzip files
+.SH SYNOPSIS
+.B lunzip
+[\fIoptions\fR] [\fIfiles\fR]
+.SH DESCRIPTION
+Lunzip \- Decompressor for lzip files.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+output version information and exit
+.TP
+\fB\-c\fR, \fB\-\-stdout\fR
+send output to standard output
+.TP
+\fB\-d\fR, \fB\-\-decompress\fR
+decompress
+.TP
+\fB\-f\fR, \fB\-\-force\fR
+overwrite existing output files
+.TP
+\fB\-k\fR, \fB\-\-keep\fR
+keep (don't delete) input files
+.TP
+\fB\-o\fR, \fB\-\-output=\fR<file>
+if reading stdin, place the output into <file>
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+suppress all messages
+.TP
+\fB\-t\fR, \fB\-\-test\fR
+test compressed file integrity
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+be verbose (a 2nd \fB\-v\fR gives more)
+.PP
+If no file names are given, lunzip decompresses from standard input to
+standard output.
+.SH "REPORTING BUGS"
+Report bugs to lzip\-bug@nongnu.org
+.br
+Lunzip home page: http://www.nongnu.org/lzip/lunzip.html
+.SH COPYRIGHT
+Copyright \(co 2010 Antonio Diaz Diaz.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
+.br
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
diff --git a/lunzip.h b/lunzip.h
new file mode 100644
index 0000000..52b0f27
--- /dev/null
+++ b/lunzip.h
@@ -0,0 +1,280 @@
+/* Lunzip - Decompressor for lzip files
+ Copyright (C) 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
+ 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/>.
+*/
+
+#ifndef max
+ #define max(x,y) ((x) >= (y) ? (x) : (y))
+#endif
+#ifndef min
+ #define min(x,y) ((x) <= (y) ? (x) : (y))
+#endif
+
+typedef unsigned char State;
+
+enum { states = 12 };
+
+static inline bool St_is_char( const State st ) { return st < 7; }
+
+static inline void St_set_char( State * const st )
+ {
+ static const unsigned char next[states] =
+ { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5 };
+ *st = next[*st];
+ }
+
+static inline void St_set_match( State * const st )
+ {
+ static const unsigned char next[states] =
+ { 7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10 };
+ *st = next[*st];
+ }
+
+static inline void St_set_rep( State * const st )
+ {
+ static const unsigned char next[states] =
+ { 8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11 };
+ *st = next[*st];
+ }
+
+static inline void St_set_short_rep( State * const st )
+ {
+ static const unsigned char next[states] =
+ { 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11 };
+ *st = next[*st];
+ }
+
+enum {
+ min_dictionary_bits = 12,
+ min_dictionary_size = 1 << min_dictionary_bits,
+ max_dictionary_bits = 29,
+ max_dictionary_size = 1 << max_dictionary_bits,
+ literal_context_bits = 3,
+ pos_state_bits = 2,
+ pos_states = 1 << pos_state_bits,
+ pos_state_mask = pos_states - 1,
+
+ dis_slot_bits = 6,
+ start_dis_model = 4,
+ end_dis_model = 14,
+ modeled_distances = 1 << (end_dis_model / 2),
+ dis_align_bits = 4,
+ dis_align_size = 1 << dis_align_bits,
+
+ len_low_bits = 3,
+ len_mid_bits = 3,
+ len_high_bits = 8,
+ len_low_symbols = 1 << len_low_bits,
+ len_mid_symbols = 1 << len_mid_bits,
+ len_high_symbols = 1 << len_high_bits,
+ max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols,
+
+ min_match_len = 2, /* must be 2 */
+ max_match_len = min_match_len + max_len_symbols - 1, /* 273 */
+ min_match_len_limit = 5,
+
+ max_dis_states = 4 };
+
+static inline int get_dis_state( int len )
+ {
+ len -= min_match_len;
+ if( len >= max_dis_states ) len = max_dis_states - 1;
+ return len;
+ }
+
+
+enum { bit_model_move_bits = 5,
+ bit_model_total_bits = 11,
+ bit_model_total = 1 << bit_model_total_bits };
+
+typedef unsigned int Bit_model;
+
+static inline void Bm_init( Bit_model * const probability )
+ { *probability = bit_model_total / 2; }
+
+
+struct Pretty_print
+ {
+ const char * name_;
+ const char * stdin_name;
+ int longest_name;
+ int verbosity;
+ bool first_post;
+ };
+
+void Pp_init( struct Pretty_print * const pp, const char * const filenames[],
+ const int num_filenames, const int v );
+
+static inline void Pp_set_name( struct Pretty_print * const pp,
+ const char * const filename )
+ {
+ if( filename && filename[0] && strcmp( filename, "-" ) )
+ pp->name_ = filename;
+ else pp->name_ = pp->stdin_name;
+ pp->first_post = true;
+ }
+
+static inline void Pp_reset( struct Pretty_print * const pp )
+ { if( pp->name_ && pp->name_[0] ) pp->first_post = true; }
+void Pp_show_msg( struct Pretty_print * const pp, const char * const msg );
+
+
+typedef uint32_t CRC32[256]; /* Table of CRCs of all 8-bit messages. */
+
+extern CRC32 crc32;
+
+static inline void CRC32_init()
+ {
+ unsigned int n;
+ for( n = 0; n < 256; ++n )
+ {
+ unsigned int c = n;
+ int k;
+ for( k = 0; k < 8; ++k )
+ { if( c & 1 ) c = 0xEDB88320U ^ ( c >> 1 ); else c >>= 1; }
+ crc32[n] = c;
+ }
+ }
+
+static inline void CRC32_update_byte( uint32_t * crc, const uint8_t byte )
+ { *crc = crc32[(*crc^byte)&0xFF] ^ ( *crc >> 8 ); }
+static inline void CRC32_update_buf( uint32_t * crc, const uint8_t * const buffer,
+ const int size )
+ {
+ int i;
+ for( i = 0; i < size; ++i )
+ *crc = crc32[(*crc^buffer[i])&0xFF] ^ ( *crc >> 8 );
+ }
+
+
+static inline int real_bits( const int value )
+ {
+ int bits = 0, i, mask;
+ for( i = 1, mask = 1; mask > 0; ++i, mask <<= 1 )
+ if( value & mask ) bits = i;
+ return bits;
+ }
+
+
+static const uint8_t magic_string[4] = { 'L', 'Z', 'I', 'P' };
+
+typedef uint8_t File_header[6]; /* 0-3 magic bytes */
+ /* 4 version */
+ /* 5 coded_dict_size; */
+enum { Fh_size = 6 };
+
+static inline void Fh_set_magic( File_header data )
+ {
+ memcpy( data, magic_string, 4 );
+ data[4] = 1;
+ }
+
+static inline bool Fh_verify_magic( const File_header data )
+ {
+ return ( memcmp( data, magic_string, 4 ) == 0 );
+ }
+
+static inline uint8_t Fh_version( const File_header data )
+ { return data[4]; }
+
+static inline bool Fh_verify_version( const File_header data )
+ { return ( data[4] <= 1 ); }
+
+static inline int Fh_get_dictionary_size( const File_header data )
+ {
+ int sz = ( 1 << ( data[5] & 0x1F ) );
+ if( sz > min_dictionary_size && sz <= max_dictionary_size )
+ sz -= ( sz / 16 ) * ( ( data[5] >> 5 ) & 0x07 );
+ return sz;
+ }
+
+static inline bool Fh_set_dictionary_size( File_header data, const int sz )
+ {
+ if( sz >= min_dictionary_size && sz <= max_dictionary_size )
+ {
+ data[5] = real_bits( sz - 1 );
+ if( sz > min_dictionary_size )
+ {
+ const int base_size = 1 << data[5];
+ const int wedge = base_size / 16;
+ int i;
+ for( i = 7; i >= 1; --i )
+ if( base_size - ( i * wedge ) >= sz )
+ { data[5] |= ( i << 5 ); break; }
+ }
+ return true;
+ }
+ return false;
+ }
+
+
+typedef uint8_t File_trailer[20];
+ /* 0-3 CRC32 of the uncompressed data */
+ /* 4-11 size of the uncompressed data */
+ /* 12-19 member size including header and trailer */
+
+enum { Ft_size = 20 };
+
+static inline int Ft_versioned_size( const int version )
+ { return ( ( version >= 1 ) ? 20 : 12 ); }
+
+static inline uint32_t Ft_get_data_crc( const File_trailer data )
+ {
+ uint32_t tmp = 0;
+ int i;
+ for( i = 3; i >= 0; --i ) { tmp <<= 8; tmp += data[i]; }
+ return tmp;
+ }
+
+static inline void Ft_set_data_crc( File_trailer data, uint32_t crc )
+ {
+ int i;
+ for( i = 0; i <= 3; ++i ) { data[i] = (uint8_t)crc; crc >>= 8; }
+ }
+
+static inline long long Ft_get_data_size( const File_trailer data )
+ {
+ long long tmp = 0;
+ int i;
+ for( i = 11; i >= 4; --i ) { tmp <<= 8; tmp += data[i]; }
+ return tmp;
+ }
+
+static inline void Ft_set_data_size( File_trailer data, long long sz )
+ {
+ int i;
+ for( i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+ }
+
+static inline long long Ft_get_member_size( const File_trailer data )
+ {
+ long long tmp = 0;
+ int i;
+ for( i = 19; i >= 12; --i ) { tmp <<= 8; tmp += data[i]; }
+ return tmp;
+ }
+
+static inline void Ft_set_member_size( File_trailer data, long long sz )
+ {
+ int i;
+ for( i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+ }
+
+
+/* defined in main.c */
+void cleanup_and_fail( const int retval );
+void show_error( const char * const msg, const int errcode, const bool help );
+int readblock( const int fd, uint8_t * const buf, const int size );
+int writeblock( const int fd, const uint8_t * const buf, const int size );
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..11d733b
--- /dev/null
+++ b/main.c
@@ -0,0 +1,657 @@
+/* Lunzip - Decompressor for lzip files
+ Copyright (C) 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
+ 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/>.
+*/
+/*
+ Return values: 0 for a normal exit, 1 for environmental problems
+ (file not found, invalid flags, I/O errors, etc), 2 to indicate a
+ corrupt or invalid input file, 3 for an internal consistency error
+ (eg, bug) which caused lunzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#if defined(__MSVCRT__)
+#include <io.h>
+#define fchmod(x,y) 0
+#define fchown(x,y,z) 0
+#define SIGHUP SIGTERM
+#define S_ISSOCK(x) 0
+#define S_IRGRP 0
+#define S_IWGRP 0
+#define S_IROTH 0
+#define S_IWOTH 0
+#endif
+#if defined(__OS2__)
+#include <io.h>
+#endif
+
+#include "carg_parser.h"
+#include "lunzip.h"
+#include "decoder.h"
+
+#if CHAR_BIT != 8
+#error "Environments where CHAR_BIT != 8 are not supported."
+#endif
+
+long long int llabs( long long int number );
+
+
+const char * const Program_name = "Lunzip";
+const char * const program_name = "lunzip";
+const char * const program_year = "2010";
+const char * invocation_name = 0;
+
+#ifdef O_BINARY
+const int o_binary = O_BINARY;
+#else
+const int o_binary = 0;
+#endif
+
+struct { const char * from; const char * to; } const known_extensions[] = {
+ { ".lz", "" },
+ { ".tlz", ".tar" },
+ { 0, 0 } };
+
+char * output_filename = 0;
+int outfd = -1;
+int verbosity = 0;
+mode_t outfd_mode = S_IRUSR | S_IWUSR;
+bool delete_output_on_interrupt = false;
+
+
+/* assure at least a minimum size for buffer `buf' */
+static void * resize_buffer( void * buf, const int min_size )
+ {
+ if( buf ) buf = realloc( buf, min_size );
+ else buf = malloc( min_size );
+ if( !buf )
+ {
+ show_error( "Not enough memory.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+ return buf;
+ }
+
+
+static void show_help()
+ {
+ printf( "%s - Decompressor for lzip files.\n", Program_name );
+ printf( "\nUsage: %s [options] [files]\n", invocation_name );
+ printf( "\nOptions:\n" );
+ printf( " -h, --help display this help and exit\n" );
+ printf( " -V, --version output version information and exit\n" );
+ printf( " -c, --stdout send output to standard output\n" );
+ printf( " -d, --decompress decompress\n" );
+ printf( " -f, --force overwrite existing output files\n" );
+ printf( " -k, --keep keep (don't delete) input files\n" );
+ printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" );
+ printf( " -q, --quiet suppress all messages\n" );
+ printf( " -t, --test test compressed file integrity\n" );
+ printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" );
+ printf( "If no file names are given, %s decompresses from standard input to\n", program_name );
+ printf( "standard output.\n" );
+ printf( "\nReport bugs to lzip-bug@nongnu.org\n" );
+ printf( "Lunzip home page: http://www.nongnu.org/lzip/lunzip.html\n" );
+ }
+
+
+static void show_version()
+ {
+ printf( "%s %s\n", Program_name, PROGVERSION );
+ printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+ printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" );
+ printf( "This is free software: you are free to change and redistribute it.\n" );
+ printf( "There is NO WARRANTY, to the extent permitted by law.\n" );
+ }
+
+
+static const char * format_num( long long num )
+ {
+ const char * const prefix[8] =
+ { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
+ enum { buf_size = 16, factor = 1024 };
+ static char buf[buf_size];
+ const char *p = "";
+ int i;
+
+ for( i = 0; i < 8 && ( llabs( num ) > 9999 ||
+ ( llabs( num ) >= factor && num % factor == 0 ) ); ++i )
+ { num /= factor; p = prefix[i]; }
+ snprintf( buf, buf_size, "%lld %s", num, p );
+ return buf;
+ }
+
+
+static int open_instream( const char * const name,
+ struct stat * const in_statsp, const bool to_stdout )
+ {
+ int infd = -1;
+ infd = open( name, O_RDONLY | o_binary );
+ if( infd < 0 )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
+ program_name, name, strerror( errno ) );
+ }
+ else
+ {
+ const int i = fstat( infd, in_statsp );
+ const mode_t mode = in_statsp->st_mode;
+ const bool can_read = ( i == 0 &&
+ ( S_ISBLK( mode ) || S_ISCHR( mode ) ||
+ S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
+ if( i != 0 || ( !S_ISREG( mode ) && ( !to_stdout || !can_read ) ) )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: Input file `%s' is not a regular file%s.\n",
+ program_name, name,
+ ( can_read && !to_stdout ) ?
+ " and `--stdout' was not specified" : "" );
+ close( infd );
+ infd = -1;
+ }
+ }
+ return infd;
+ }
+
+
+static int extension_index( const char * const name )
+ {
+ int i;
+ for( i = 0; known_extensions[i].from; ++i )
+ {
+ const char * const ext = known_extensions[i].from;
+ if( strlen( name ) > strlen( ext ) &&
+ strncmp( name + strlen( name ) - strlen( ext ), ext, strlen( ext ) ) == 0 )
+ return i;
+ }
+ return -1;
+ }
+
+
+static void set_d_outname( const char * const name )
+ {
+ const int i = extension_index( name );
+ if( i >= 0 )
+ {
+ const char * const from = known_extensions[i].from;
+ if( strlen( name ) > strlen( from ) )
+ {
+ output_filename = resize_buffer( output_filename, strlen( name ) +
+ strlen( known_extensions[0].to ) + 1 );
+ strcpy( output_filename, name );
+ strcpy( output_filename + strlen( name ) - strlen( from ),
+ known_extensions[i].to );
+ return;
+ }
+ }
+ output_filename = resize_buffer( output_filename, strlen( name ) + 4 + 1 );
+ strcpy( output_filename, name );
+ strcat( output_filename, ".out" );
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: Can't guess original name for `%s' -- using `%s'.\n",
+ program_name, name, output_filename );
+ }
+
+
+static bool open_outstream( const bool force )
+ {
+ int flags = O_CREAT | O_WRONLY | o_binary;
+ if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
+
+ outfd = open( output_filename, flags, outfd_mode );
+ if( outfd < 0 && verbosity >= 0 )
+ {
+ if( errno == EEXIST )
+ fprintf( stderr, "%s: Output file %s already exists, skipping.\n",
+ program_name, output_filename );
+ else
+ fprintf( stderr, "%s: Can't create output file `%s': %s.\n",
+ program_name, output_filename, strerror( errno ) );
+ }
+ return ( outfd >= 0 );
+ }
+
+
+void cleanup_and_fail( const int retval )
+ {
+ if( delete_output_on_interrupt )
+ {
+ delete_output_on_interrupt = false;
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
+ program_name, output_filename );
+ if( outfd >= 0 ) { close( outfd ); outfd = -1; }
+ if( remove( output_filename ) != 0 )
+ show_error( "WARNING: deletion of output file (apparently) failed.", 0, false );
+ }
+ exit( retval );
+ }
+
+
+ /* Set permissions, owner and times. */
+static void close_and_set_permissions( const struct stat * const in_statsp )
+ {
+ bool error = false;
+ if( in_statsp )
+ {
+ if( fchmod( outfd, in_statsp->st_mode ) != 0 ||
+ ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
+ errno != EPERM ) ) error = true;
+ /* fchown will in many cases return with EPERM, which can be safely ignored. */
+ }
+ if( close( outfd ) == 0 ) outfd = -1;
+ else cleanup_and_fail( 1 );
+ delete_output_on_interrupt = false;
+ if( !in_statsp ) return;
+ if( !error )
+ {
+ struct utimbuf t;
+ t.actime = in_statsp->st_atime;
+ t.modtime = in_statsp->st_mtime;
+ if( utime( output_filename, &t ) != 0 ) error = true;
+ }
+ if( error )
+ {
+ show_error( "Can't change output file attributes.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+ }
+
+
+static int decompress( const int infd, struct Pretty_print * const pp,
+ const bool testing )
+ {
+ long long partial_file_pos = 0;
+ struct Range_decoder rdec;
+ int retval = 0, i, result;
+ bool first_member;
+ Rd_init( &rdec, infd );
+
+ for( first_member = true; ; first_member = false, Pp_reset( pp ) )
+ {
+ File_header header;
+ struct LZ_decoder decoder;
+ Rd_reset_member_position( &rdec );
+ for( i = 0; i < Fh_size; ++i )
+ header[i] = Rd_get_byte( &rdec );
+ if( Rd_finished( &rdec ) ) /* End Of File */
+ {
+ if( first_member )
+ { Pp_show_msg( pp, "Error reading member header" ); retval = 1; }
+ break;
+ }
+ if( !Fh_verify_magic( header ) )
+ {
+ if( !first_member ) break; /* trailing garbage */
+ Pp_show_msg( pp, "Bad magic number (file not in lzip format)" );
+ retval = 2; break;
+ }
+ if( !Fh_verify_version( header ) )
+ {
+ if( verbosity >= 0 )
+ { Pp_show_msg( pp, 0 );
+ fprintf( stderr, "Version %d member format not supported.\n",
+ Fh_version( header ) ); }
+ retval = 2; break;
+ }
+ if( Fh_get_dictionary_size( header ) < min_dictionary_size ||
+ Fh_get_dictionary_size( header ) > max_dictionary_size )
+ { Pp_show_msg( pp, "Invalid dictionary size in member header" );
+ retval = 2; break; }
+
+ if( verbosity >= 1 )
+ {
+ Pp_show_msg( pp, 0 );
+ if( verbosity >= 2 )
+ fprintf( stderr, "version %d, dictionary size %7sB. ",
+ Fh_version( header ),
+ format_num( Fh_get_dictionary_size( header ) ) );
+ }
+ LZd_init( &decoder, header, &rdec, outfd );
+
+ result = LZd_decode_member( &decoder, pp );
+ partial_file_pos += Rd_member_position( &rdec );
+ LZd_free( &decoder );
+ if( result != 0 )
+ {
+ if( verbosity >= 0 && result <= 2 )
+ {
+ Pp_show_msg( pp, 0 );
+ if( result == 2 )
+ fprintf( stderr, "File ends unexpectedly at pos %lld\n",
+ partial_file_pos );
+ else
+ fprintf( stderr, "Decoder error at pos %lld\n", partial_file_pos );
+ }
+ retval = 2; break;
+ }
+ if( verbosity >= 1 )
+ { if( testing ) fprintf( stderr, "ok\n" );
+ else fprintf( stderr, "done\n" ); }
+ }
+ Rd_free( &rdec );
+ return retval;
+ }
+
+
+void signal_handler( int sig )
+ {
+ sig = 0; /* keep compiler happy */
+ show_error( "Control-C or similar caught, quitting.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+
+
+static void set_signals()
+ {
+ signal( SIGHUP, signal_handler );
+ signal( SIGINT, signal_handler );
+ signal( SIGTERM, signal_handler );
+ }
+
+
+void Pp_init( struct Pretty_print * const pp, const char * const filenames[],
+ const int num_filenames, const int v )
+ {
+ unsigned int stdin_name_len;
+ int i;
+ pp->name_ = 0;
+ pp->stdin_name = "(stdin)";
+ pp->longest_name = 0;
+ pp->verbosity = v;
+ pp->first_post = false;
+ stdin_name_len = strlen( pp->stdin_name );
+
+ for( i = 0; i < num_filenames; ++i )
+ {
+ const char * const s = filenames[i];
+ const int len = ( !strcmp( s, "-" ) ? stdin_name_len : strlen( s ) );
+ if( len > pp->longest_name ) pp->longest_name = len;
+ }
+ if( pp->longest_name == 0 ) pp->longest_name = stdin_name_len;
+ }
+
+
+void Pp_show_msg( struct Pretty_print * const pp, const char * const msg )
+ {
+ if( verbosity >= 0 )
+ {
+ if( pp->first_post )
+ {
+ int i, len;
+ pp->first_post = false;
+ fprintf( stderr, " %s: ", pp->name_ );
+ len = pp->longest_name - strlen( pp->name_ );
+ for( i = 0; i < len; ++i ) fprintf( stderr, " " );
+ if( !msg ) fflush( stderr );
+ }
+ if( msg ) fprintf( stderr, "%s.\n", msg );
+ }
+ }
+
+
+void show_error( const char * const msg, const int errcode, const bool help )
+ {
+ if( verbosity >= 0 )
+ {
+ if( msg && msg[0] )
+ {
+ fprintf( stderr, "%s: %s", program_name, msg );
+ if( errcode > 0 ) fprintf( stderr, ": %s", strerror( errcode ) );
+ fprintf( stderr, "\n" );
+ }
+ if( help && invocation_name && invocation_name[0] )
+ fprintf( stderr, "Try `%s --help' for more information.\n",
+ invocation_name );
+ }
+ }
+
+
+void internal_error( const char * const msg )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: internal error: %s.\n", program_name, msg );
+ exit( 3 );
+ }
+
+
+/* Returns the number of bytes really read.
+ If (returned value < size) and (errno == 0), means EOF was reached.
+*/
+int readblock( const int fd, uint8_t * const buf, const int size )
+ {
+ int rest = size;
+ while( true )
+ {
+ int n;
+ errno = 0;
+ if( rest <= 0 ) break;
+ n = read( fd, buf + size - rest, rest );
+ if( n > 0 ) rest -= n;
+ else if( n == 0 ) break;
+ else if( errno != EINTR && errno != EAGAIN ) break;
+ }
+ return ( rest > 0 ) ? size - rest : size;
+ }
+
+
+/* Returns the number of bytes really written.
+ If (returned value < size), it is always an error.
+*/
+int writeblock( const int fd, const uint8_t * const buf, const int size )
+ {
+ int rest = size;
+ while( true )
+ {
+ int n;
+ errno = 0;
+ if( rest <= 0 ) break;
+ n = write( fd, buf + size - rest, rest );
+ if( n > 0 ) rest -= n;
+ else if( errno && errno != EINTR && errno != EAGAIN ) break;
+ }
+ return ( rest > 0 ) ? size - rest : size;
+ }
+
+
+int main( const int argc, const char * const argv[] )
+ {
+ const char * input_filename = "";
+ const char * default_output_filename = "";
+ const char ** filenames = 0;
+ int num_filenames = 0;
+ int infd = -1;
+ int argind = 0;
+ int retval = 0;
+ int i;
+ bool filenames_given = false;
+ bool force = false;
+ bool keep_input_files = false;
+ bool testing = false;
+ bool to_stdout = false;
+ struct Pretty_print pp;
+
+ const struct ap_Option options[] =
+ {
+ { 'c', "stdout", ap_no },
+ { 'd', "decompress", ap_no },
+ { 'f', "force", ap_no },
+ { 'h', "help", ap_no },
+ { 'k', "keep", ap_no },
+ { 'o', "output", ap_yes },
+ { 'q', "quiet", ap_no },
+ { 't', "test", ap_no },
+ { 'v', "verbose", ap_no },
+ { 'V', "version", ap_no },
+ { 0 , 0, ap_no } };
+
+ struct Arg_parser parser;
+
+ invocation_name = argv[0];
+ CRC32_init();
+ if( !ap_init( &parser, argc, argv, options, 0 ) )
+ { show_error( "Memory exhausted.", 0, false ); return 1; }
+ if( ap_error( &parser ) ) /* bad option */
+ { show_error( ap_error( &parser ), 0, true ); return 1; }
+
+ for( ; argind < ap_arguments( &parser ); ++argind )
+ {
+ const int code = ap_code( &parser, argind );
+ const char * const arg = ap_argument( &parser, argind );
+ if( !code ) break; /* no more options */
+ switch( code )
+ {
+ case 'c': to_stdout = true; break;
+ case 'd': testing = false; break;
+ case 'f': force = true; break;
+ case 'h': show_help(); return 0;
+ case 'k': keep_input_files = true; break;
+ case 'o': default_output_filename = arg; break;
+ case 'q': verbosity = -1; break;
+ case 't': testing = true; break;
+ case 'v': if( verbosity < 4 ) ++verbosity; break;
+ case 'V': show_version(); return 0;
+ default : internal_error( "uncaught option" );
+ }
+ } /* end process options */
+
+#if defined(__MSVCRT__) || defined(__OS2__)
+ _fsetmode( stdin, "b" );
+ _fsetmode( stdout, "b" );
+#endif
+
+ for( ; argind < ap_arguments( &parser ); ++argind )
+ {
+ if( strcmp( ap_argument( &parser, argind ), "-" ) )
+ filenames_given = true;
+ ++num_filenames;
+ filenames = resize_buffer( filenames, num_filenames * sizeof (char *) );
+ filenames[num_filenames-1] = ap_argument( &parser, argind );
+ }
+
+ if( num_filenames == 0 )
+ {
+ ++num_filenames;
+ filenames = resize_buffer( filenames, sizeof (char *) );
+ filenames[num_filenames-1] = "-";
+ }
+ if( !to_stdout && !testing &&
+ ( filenames_given || default_output_filename[0] ) )
+ set_signals();
+
+ Pp_init( &pp, filenames, num_filenames, verbosity );
+ if( testing )
+ outfd = -1;
+
+ output_filename = resize_buffer( output_filename, 1 );
+ for( i = 0; i < num_filenames; ++i )
+ {
+ int tmp;
+ struct stat in_stats;
+ const struct stat * in_statsp;
+ output_filename[0] = 0;
+
+ if( !filenames[i][0] || !strcmp( filenames[i], "-" ) )
+ {
+ input_filename = "";
+ infd = STDIN_FILENO;
+ if( !testing )
+ {
+ if( to_stdout || !default_output_filename[0] )
+ outfd = STDOUT_FILENO;
+ else
+ {
+ output_filename = resize_buffer( output_filename,
+ strlen( default_output_filename ) + 1 );
+ strcpy( output_filename, default_output_filename );
+ outfd_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+ if( !open_outstream( force ) )
+ {
+ if( outfd == -1 && retval < 1 ) retval = 1;
+ close( infd ); infd = -1;
+ continue;
+ }
+ }
+ }
+ }
+ else
+ {
+ input_filename = filenames[i];
+ infd = open_instream( input_filename, &in_stats, to_stdout );
+ if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
+ if( !testing )
+ {
+ if( to_stdout ) outfd = STDOUT_FILENO;
+ else
+ {
+ set_d_outname( input_filename );
+ outfd_mode = S_IRUSR | S_IWUSR;
+ if( !open_outstream( force ) )
+ {
+ if( outfd == -1 && retval < 1 ) retval = 1;
+ close( infd ); infd = -1;
+ continue;
+ }
+ }
+ }
+ }
+
+ if( isatty( infd ) )
+ {
+ show_error( "I won't read compressed data from a terminal.", 0, true );
+ return 1;
+ }
+
+ if( output_filename[0] && !to_stdout && !testing )
+ delete_output_on_interrupt = true;
+ in_statsp = input_filename[0] ? &in_stats : 0;
+ Pp_set_name( &pp, input_filename );
+ tmp = decompress( infd, &pp, testing );
+ if( tmp > retval ) retval = tmp;
+ if( tmp && !testing ) cleanup_and_fail( retval );
+
+ if( delete_output_on_interrupt )
+ close_and_set_permissions( in_statsp );
+ if( input_filename[0] )
+ {
+ close( infd ); infd = -1;
+ if( !keep_input_files && !to_stdout && !testing )
+ remove( input_filename );
+ }
+ }
+ if( outfd >= 0 && close( outfd ) != 0 )
+ {
+ show_error( "Can't close stdout", errno, false );
+ if( retval < 1 ) retval = 1;
+ }
+ free( output_filename );
+ free( filenames );
+ ap_free( &parser );
+ return retval;
+ }
diff --git a/testsuite/check.sh b/testsuite/check.sh
new file mode 100755
index 0000000..5743d4a
--- /dev/null
+++ b/testsuite/check.sh
@@ -0,0 +1,76 @@
+#! /bin/sh
+# check script for Lunzip - Decompressor for lzip files
+# Copyright (C) 2010 Antonio Diaz Diaz.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+LC_ALL=C
+export LC_ALL
+objdir=`pwd`
+testdir=`cd "$1" ; pwd`
+LZIP="${objdir}"/lunzip
+framework_failure() { echo "failure in testing framework" ; exit 1 ; }
+
+if [ ! -x "${LZIP}" ] ; then
+ echo "${LZIP}: cannot execute"
+ exit 1
+fi
+
+if [ -d tmp ] ; then rm -rf tmp ; fi
+mkdir tmp
+printf "testing lunzip-%s..." "$2"
+cd "${objdir}"/tmp
+
+cat "${testdir}"/test.txt > in || framework_failure
+cat in in > in2 || framework_failure
+cat "${testdir}"/test_v1.lz > in.lz || framework_failure
+cat in.lz in.lz > in2.lz || framework_failure
+fail=0
+
+"${LZIP}" -t "${testdir}"/test_v0.lz || fail=1
+printf .
+"${LZIP}" -cd "${testdir}"/test_v0.lz > copy || fail=1
+cmp in copy || fail=1
+printf .
+
+"${LZIP}" -t "${testdir}"/test_v1.lz || fail=1
+printf .
+"${LZIP}" -cd "${testdir}"/test_v1.lz > copy || fail=1
+cmp in copy || fail=1
+printf .
+
+"${LZIP}" -t in2.lz || fail=1
+printf .
+"${LZIP}" -cd in2.lz > copy2 || fail=1
+cmp in2 copy2 || fail=1
+printf .
+
+cat in2.lz > copy2.lz || framework_failure
+printf "garbage" >> copy2.lz || framework_failure
+printf "to be overwritten" > copy2 || framework_failure
+"${LZIP}" -t copy2.lz || fail=1
+printf .
+"${LZIP}" -dfk copy2.lz || fail=1
+cmp in2 copy2 || fail=1
+printf .
+
+cat in.lz > out.lz || framework_failure
+printf "to be overwritten" > copy || framework_failure
+"${LZIP}" -df -o copy < out.lz || fail=1
+cmp in copy || fail=1
+printf .
+
+cat in.lz > anyothername || framework_failure
+"${LZIP}" -q anyothername || fail=1
+cmp in anyothername.out || fail=1
+printf .
+
+echo
+if [ ${fail} = 0 ] ; then
+ echo "tests completed successfully."
+ cd "${objdir}" && rm -r tmp
+else
+ echo "tests failed."
+fi
+exit ${fail}
diff --git a/testsuite/test.txt b/testsuite/test.txt
new file mode 100644
index 0000000..5b244d5
--- /dev/null
+++ b/testsuite/test.txt
@@ -0,0 +1,676 @@
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too, receive
+or can get the source code. And you must show them these terms so they
+know their rights.
+
+ Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+ For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+ Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so. This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software. The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable. Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products. If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+ Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary. To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+ "The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+ To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+ A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+ To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+ To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+ An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
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+
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