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| -rw-r--r-- | AUTHORS | 1 | ||||
| -rw-r--r-- | COPYING | 676 | ||||
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | INSTALL | 56 | ||||
| -rw-r--r-- | Makefile.in | 105 | ||||
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | README | 42 | ||||
| -rw-r--r-- | carg_parser.c | 292 | ||||
| -rw-r--r-- | carg_parser.h | 101 | ||||
| -rwxr-xr-x | configure | 194 | ||||
| -rw-r--r-- | decoder.c | 248 | ||||
| -rw-r--r-- | decoder.h | 380 | ||||
| -rw-r--r-- | doc/lunzip.1 | 53 | ||||
| -rw-r--r-- | lunzip.h | 280 | ||||
| -rw-r--r-- | main.c | 657 | ||||
| -rwxr-xr-x | testsuite/check.sh | 76 | ||||
| -rw-r--r-- | testsuite/test.txt | 676 | ||||
| -rw-r--r-- | testsuite/test_v0.lz | bin | 0 -> 11540 bytes | |||
| -rw-r--r-- | testsuite/test_v1.lz | bin | 0 -> 11548 bytes |
19 files changed, 3854 insertions, 0 deletions
@@ -0,0 +1 @@ +Lunzip was written by Antonio Diaz Diaz. @@ -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. 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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. @@ -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 @@ -0,0 +1,5 @@ +Changes in version 1.0: + +Initial release. + +Created from the decompression code of clzip 1.1-rc2. @@ -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 ); @@ -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 @@ +
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+ Nothing in this License shall be construed as excluding or limiting
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+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
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+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
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+ 14. Revised Versions of this License.
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+
+ 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
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+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
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+
+ 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/test_v0.lz b/testsuite/test_v0.lz Binary files differnew file mode 100644 index 0000000..a09b1e8 --- /dev/null +++ b/testsuite/test_v0.lz diff --git a/testsuite/test_v1.lz b/testsuite/test_v1.lz Binary files differnew file mode 100644 index 0000000..f1c79eb --- /dev/null +++ b/testsuite/test_v1.lz |