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-rw-r--r--main.c899
1 files changed, 899 insertions, 0 deletions
diff --git a/main.c b/main.c
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+++ b/main.c
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+/* Clzip - A data compressor based on the LZMA algorithm
+ 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 clzip 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>
+
+#include "carg_parser.h"
+#include "clzip.h"
+#include "decoder.h"
+#include "encoder.h"
+
+#if CHAR_BIT != 8
+#error "Environments where CHAR_BIT != 8 are not supported."
+#endif
+
+#ifndef LLONG_MAX
+#define LLONG_MAX 0x7FFFFFFFFFFFFFFFLL
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN (-LLONG_MAX - 1LL)
+#endif
+#ifndef ULLONG_MAX
+#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
+#endif
+
+
+const char * invocation_name = 0;
+const char * const Program_name = "Clzip";
+const char * const program_name = "clzip";
+const char * const program_year = "2010";
+
+#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 } };
+
+struct Lzma_options
+ {
+ int dictionary_size; // 4KiB..512MiB
+ int match_len_limit; // 5..273
+ };
+
+enum Mode { m_compress = 0, m_decompress, m_test };
+
+char * output_filename = 0;
+int outfd = -1;
+bool delete_output_on_interrupt = false;
+
+
+// assure at least a minimum size for buffer `buf'
+inline void * resize_buffer( void * buf, const int min_size )
+ {
+ if( buf ) buf = realloc( buf, min_size );
+ else buf = malloc( min_size );
+ return buf;
+ }
+
+
+static void show_help()
+ {
+ printf( "%s - A data compressor based on the LZMA algorithm.\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( " -b, --member-size=<n> set member size limit in bytes\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( " -m, --match-length=<n> set match length limit in bytes [80]\n" );
+ printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" );
+ printf( " -q, --quiet suppress all messages\n" );
+ printf( " -s, --dictionary-size=<n> set dictionary size limit in bytes [8MiB]\n" );
+ printf( " -S, --volume-size=<n> set volume size limit in bytes\n" );
+ printf( " -t, --test test compressed file integrity\n" );
+ printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" );
+ printf( " -1 .. -9 set compression level [default 6]\n" );
+ printf( " --fast alias for -1\n" );
+ printf( " --best alias for -9\n" );
+ printf( "If no file names are given, %s compresses or decompresses\n", program_name );
+ printf( "from standard input to standard output.\n" );
+ printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" );
+ printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" );
+ printf( "\nReport bugs to lzip-bug@nongnu.org\n" );
+ printf( "Clzip home page: http://www.nongnu.org/lzip/clzip.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, long long limit,
+ const int set_prefix )
+ {
+ const char * const si_prefix[8] =
+ { "k", "M", "G", "T", "P", "E", "Z", "Y" };
+ const char * const binary_prefix[8] =
+ { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
+ static bool si = false;
+ static char buf[16];
+
+ if( set_prefix ) si = ( set_prefix > 0 );
+ const int factor = ( si ) ? 1000 : 1024;
+ const char * const *prefix = ( si ) ? si_prefix : binary_prefix;
+ const char *p = "";
+ limit = max( 999LL, min( 999999LL, limit ) );
+
+ for( int i = 0; i < 8 && ( llabs( num ) > limit ||
+ ( llabs( num ) >= factor && num % factor == 0 ) ); ++i )
+ { num /= factor; p = prefix[i]; }
+ snprintf( buf, sizeof buf, "%lld %s", num, p );
+ return buf;
+ }
+
+
+static long long getnum( const char * const ptr, const int bs,
+ const long long llimit, const long long ulimit )
+ {
+ errno = 0;
+ char *tail;
+ long long result = strtoll( ptr, &tail, 0 );
+ if( tail == ptr )
+ {
+ show_error( "bad or missing numerical argument", 0, true );
+ exit( 1 );
+ }
+
+ if( !errno && tail[0] )
+ {
+ int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+ int exponent = 0;
+ bool bad_multiplier = false;
+ switch( tail[0] )
+ {
+ case ' ': break;
+ case 'b': if( bs > 0 ) { factor = bs; exponent = 1; }
+ else bad_multiplier = true;
+ break;
+ case 'Y': exponent = 8; break;
+ case 'Z': exponent = 7; break;
+ case 'E': exponent = 6; break;
+ case 'P': exponent = 5; break;
+ case 'T': exponent = 4; break;
+ case 'G': exponent = 3; break;
+ case 'M': exponent = 2; break;
+ case 'K': if( factor == 1024 ) exponent = 1; else bad_multiplier = true;
+ break;
+ case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
+ break;
+ default : bad_multiplier = true;
+ }
+ if( bad_multiplier )
+ {
+ show_error( "bad multiplier in numerical argument", 0, true );
+ exit( 1 );
+ }
+ for( int i = 0; i < exponent; ++i )
+ {
+ if( LLONG_MAX / factor >= llabs( result ) ) result *= factor;
+ else { errno = ERANGE; break; }
+ }
+ }
+ if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE;
+ if( errno )
+ {
+ show_error( "numerical argument out of limits", 0, false );
+ exit( 1 );
+ }
+ return result;
+ }
+
+
+static int get_dict_size( const char * const arg )
+ {
+ char *tail;
+ int bits = strtol( arg, &tail, 0 );
+ if( bits >= min_dictionary_bits &&
+ bits <= max_dictionary_bits && *tail == 0 )
+ return ( 1 << bits );
+ return getnum( arg, 0, min_dictionary_size, max_dictionary_size );
+ }
+
+
+static int extension_index( const char * const name )
+ {
+ for( int 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 int open_instream( const char * const name, struct stat * const in_statsp,
+ const enum Mode program_mode, const int eindex,
+ const bool force, const bool to_stdout )
+ {
+ int infd = -1;
+ if( program_mode == m_compress && !force && eindex >= 0 )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n",
+ program_name, name, known_extensions[eindex].from );
+ }
+ else
+ {
+ 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;
+ if( i < 0 || !( S_ISREG( mode ) || ( to_stdout &&
+ ( S_ISFIFO( mode ) || S_ISSOCK( mode ) ||
+ S_ISBLK( mode ) || S_ISCHR( mode ) ) ) ) )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n",
+ program_name, name,
+ to_stdout ? "" : " and `--stdout' was not specified" );
+ close( infd );
+ infd = -1;
+ }
+ }
+ }
+ return infd;
+ }
+
+
+static void set_c_outname( const char * const name, const bool multifile )
+ {
+ output_filename = resize_buffer( output_filename, strlen( name ) + 5 +
+ strlen( known_extensions[0].from ) + 1 );
+ strcpy( output_filename, name );
+ if( multifile ) strcat( output_filename, "00001" );
+ strcat( output_filename, known_extensions[0].from );
+ }
+
+
+static void set_d_outname( const char * const name, const int i )
+ {
+ 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,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH );
+ if( outfd < 0 )
+ {
+ if( errno == EEXIST ) outfd = -2; else outfd = -1;
+ if( verbosity >= 0 )
+ {
+ if( outfd == -2 )
+ 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 );
+ }
+
+
+static bool check_tty( const int infd, const enum Mode program_mode )
+ {
+ if( program_mode == m_compress && isatty( outfd ) )
+ {
+ show_error( "I won't write compressed data to a terminal.", 0, true );
+ return false;
+ }
+ if( ( program_mode == m_decompress || program_mode == m_test ) &&
+ isatty( infd ) )
+ {
+ show_error( "I won't read compressed data from a terminal.", 0, true );
+ return false;
+ }
+ return true;
+ }
+
+
+ // 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 ) error = true;
+ else (void)fchown( outfd, in_statsp->st_uid, in_statsp->st_gid );
+ // 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( "I can't change output file attributes.", 0, false );
+ cleanup_and_fail( 1 );
+ }
+ }
+
+
+static bool next_filename()
+ {
+ const unsigned int len = strlen( known_extensions[0].from );
+ if( strlen( output_filename ) >= len + 5 ) // "*00001.lz"
+ for( int i = strlen( output_filename ) - len - 1, j = 0; j < 5; --i, ++j )
+ {
+ if( output_filename[i] < '9' ) { ++output_filename[i]; return true; }
+ else output_filename[i] = '0';
+ }
+ return false;
+ }
+
+
+static int compress( const long long member_size, const long long volume_size,
+ const struct Lzma_options * const encoder_options, const int infd,
+ struct Pretty_print * const pp, const struct stat * const in_statsp )
+ {
+ if( verbosity >= 1 ) Pp_show_msg( pp, 0 );
+ File_header header;
+ Fh_set_magic( header );
+ if( !Fh_set_dictionary_size( header, encoder_options->dictionary_size ) ||
+ encoder_options->match_len_limit < min_match_len_limit ||
+ encoder_options->match_len_limit > max_match_len )
+ internal_error( "invalid argument to encoder" );
+
+ struct Matchfinder matchfinder;
+ Mf_init( &matchfinder, Fh_get_dictionary_size( header ),
+ encoder_options->match_len_limit, infd );
+ Fh_set_dictionary_size( header, Mf_dictionary_size( &matchfinder ) );
+
+ long long in_size = 0, out_size = 0, partial_volume_size = 0;
+ int retval = 0;
+ while( true ) // encode one member per iteration
+ {
+ struct LZ_encoder encoder;
+ LZe_init( &encoder, &matchfinder, header, outfd );
+ const long long size =
+ min( member_size, volume_size - partial_volume_size );
+ if( !LZe_encode_member( &encoder, size ) )
+ { Pp_show_msg( pp, 0 ); show_error( "encoder error", 0, false );
+ retval = 1; break; }
+ in_size += Mf_data_position( &matchfinder );
+ out_size += LZe_member_position( &encoder );
+ partial_volume_size += LZe_member_position( &encoder );
+ LZe_free( &encoder );
+ if( Mf_finished( &matchfinder ) ) break;
+ if( partial_volume_size >= volume_size - min_dictionary_size )
+ {
+ partial_volume_size = 0;
+ if( delete_output_on_interrupt )
+ {
+ close_and_set_permissions( in_statsp );
+ if( !next_filename() )
+ { Pp_show_msg( pp, 0 );
+ show_error( "too many volume files", 0, false );
+ retval = 1; break; }
+ if( !open_outstream( true ) ) { retval = 1; break; }
+ delete_output_on_interrupt = true;
+ }
+ }
+ if( !Mf_reset( &matchfinder ) )
+ { Pp_show_msg( pp, 0 ); show_error( "can't reset matchfinder", 0, false );
+ retval = 1; break; }
+ }
+
+ if( retval == 0 && verbosity >= 1 )
+ {
+ if( in_size <= 0 || out_size <= 0 )
+ fprintf( stderr, "no data compressed.\n" );
+ else
+ fprintf( stderr, "%6.3f:1, %6.3f bits/byte, "
+ "%5.2f%% saved, %lld in, %lld out.\n",
+ (double)in_size / out_size,
+ ( 8.0 * out_size ) / in_size,
+ 100.0 * ( 1.0 - ( (double)out_size / in_size ) ),
+ in_size, out_size );
+ }
+ Mf_free( &matchfinder );
+ return retval;
+ }
+
+
+static int decompress( const int infd, struct Pretty_print * const pp,
+ const bool testing )
+ {
+ struct Input_buffer ibuf;
+ Ib_init( &ibuf, infd );
+ long long partial_file_pos = 0;
+ int retval = 0;
+
+ for( bool first_member = true; ; first_member = false, Pp_reset( pp ) )
+ {
+ File_header header;
+ for( unsigned int i = 0; i < sizeof (File_header); ++i )
+ header[i] = Ib_get_byte( &ibuf );
+ if( Ib_finished( &ibuf ) ) // End Of File
+ {
+ if( !first_member ) break;
+ 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, newer %s needed.\n",
+ Fh_version( header ), program_name ); }
+ 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 ), 9999, 0 ) );
+ }
+ struct LZ_decoder decoder;
+ LZd_init( &decoder, header, &ibuf, outfd );
+
+ const int result = LZd_decode_member( &decoder, pp );
+ partial_file_pos += LZd_member_position( &decoder );
+ 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" ); }
+ }
+ Ib_free( &ibuf );
+ 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 );
+ }
+
+
+int verbosity = 0;
+
+
+void Pp_init( struct Pretty_print * const pp, const char * const filenames[],
+ const int num_filenames )
+ {
+ pp->name_ = 0;
+ pp->stdin_name = "(stdin)";
+ pp->longest_name = 0;
+ pp->first_post = false;
+ unsigned int stdin_name_len = strlen( pp->stdin_name );
+
+ for( int 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 )
+ {
+ pp->first_post = false;
+ fprintf( stderr, " %s: ", pp->name_ );
+ const int len = pp->longest_name - strlen( pp->name_ );
+ for( int i = 0; i < len; ++i ) fprintf( stderr, " " );
+ if( !msg ) fflush( stderr );
+ }
+ if( msg ) fprintf( stderr, "%s.\n", msg );
+ }
+ }
+
+
+void cleanup_and_fail( const int retval )
+ {
+ if( delete_output_on_interrupt )
+ {
+ 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 );
+ }
+
+
+void show_error( const char * const msg, const int errcode, const bool help )
+ {
+ if( verbosity >= 0 )
+ {
+ if( msg && msg[0] != 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] != 0 )
+ fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name );
+ }
+ }
+
+
+void internal_error( const char * const msg )
+ {
+ const char * const e = "internal error: ";
+ char * s = resize_buffer( 0, strlen( e ) + strlen( msg ) + 1 );
+ strcpy( s, e );
+ strcat( s, msg );
+ show_error( s, 0, false );
+ free( s );
+ 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;
+ errno = 0;
+ while( rest > 0 )
+ {
+ errno = 0;
+ const int 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;
+ errno = 0;
+ while( rest > 0 )
+ {
+ errno = 0;
+ const int 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;
+ }
+
+
+CRC32 crc32;
+
+int main( const int argc, const char * const argv[] )
+ {
+ // Mapping from gzip/bzip2 style 1..9 compression modes
+ // to the corresponding LZMA compression modes.
+ const struct Lzma_options option_mapping[] =
+ {
+ { 1 << 20, 10 }, // -1
+ { 3 << 19, 12 }, // -2
+ { 1 << 21, 17 }, // -3
+ { 3 << 20, 26 }, // -4
+ { 1 << 22, 44 }, // -5
+ { 1 << 23, 80 }, // -6
+ { 1 << 24, 108 }, // -7
+ { 3 << 23, 163 }, // -8
+ { 1 << 25, 273 } }; // -9
+ struct Lzma_options encoder_options = option_mapping[5]; // default = "-6"
+ long long member_size = LLONG_MAX;
+ long long volume_size = LLONG_MAX;
+ int infd = -1;
+ enum Mode program_mode = m_compress;
+ bool force = false;
+ bool keep_input_files = false;
+ bool to_stdout = false;
+ const char * input_filename = "";
+ const char * default_output_filename = "";
+ const char ** filenames = 0;
+ int num_filenames = 0;
+ invocation_name = argv[0];
+ CRC32_init();
+
+ const struct ap_Option options[] =
+ {
+ { '1', "fast", ap_no },
+ { '2', 0, ap_no },
+ { '3', 0, ap_no },
+ { '4', 0, ap_no },
+ { '5', 0, ap_no },
+ { '6', 0, ap_no },
+ { '7', 0, ap_no },
+ { '8', 0, ap_no },
+ { '9', "best", ap_no },
+ { 'b', "member-size", ap_yes },
+ { 'c', "stdout", ap_no },
+ { 'd', "decompress", ap_no },
+ { 'f', "force", ap_no },
+ { 'h', "help", ap_no },
+ { 'k', "keep", ap_no },
+ { 'm', "match-length", ap_yes },
+ { 'o', "output", ap_yes },
+ { 'q', "quiet", ap_no },
+ { 's', "dictionary-size", ap_yes },
+ { 'S', "volume-size", ap_yes },
+ { 't', "test", ap_no },
+ { 'v', "verbose", ap_no },
+ { 'V', "version", ap_no },
+ { 0 , 0, ap_no } };
+
+ struct Arg_parser parser;
+ if( !ap_init( &parser, argc, argv, options, 0 ) )
+ { show_error( "Memory exhausted", 0, 0 ); return 1; }
+ if( ap_error( &parser ) ) // bad option
+ { show_error( ap_error( &parser ), 0, 1 ); return 1; }
+
+ int argind = 0;
+ 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 '1': case '2': case '3':
+ case '4': case '5': case '6':
+ case '7': case '8': case '9':
+ encoder_options = option_mapping[code-'1']; break;
+ case 'b': member_size = getnum( arg, 0, 100000, LLONG_MAX / 2 ); break;
+ case 'c': to_stdout = true; break;
+ case 'd': program_mode = m_decompress; break;
+ case 'f': force = true; break;
+ case 'h': show_help(); return 0;
+ case 'k': keep_input_files = true; break;
+ case 'm': encoder_options.match_len_limit =
+ getnum( arg, 0, min_match_len_limit, max_match_len ); break;
+ case 'o': default_output_filename = arg; break;
+ case 'q': verbosity = -1; break;
+ case 's': encoder_options.dictionary_size = get_dict_size( arg );
+ break;
+ case 'S': volume_size = getnum( arg, 0, 100000, LLONG_MAX / 2 ); break;
+ case 't': program_mode = m_test; break;
+ case 'v': if( verbosity < 4 ) ++verbosity; break;
+ case 'V': show_version(); return 0;
+ default : internal_error( "uncaught option" );
+ }
+ }
+
+ bool filenames_given = false;
+ 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 && program_mode != m_test &&
+ ( filenames_given || default_output_filename[0] ) )
+ set_signals();
+
+ struct Pretty_print pp;
+ Pp_init( &pp, filenames, num_filenames );
+ if( program_mode == m_test )
+ outfd = -1;
+ else if( program_mode == m_compress )
+ {
+ Dis_slots_init();
+ Prob_prices_init();
+ }
+
+ output_filename = resize_buffer( output_filename, 1 );
+ int retval = 0;
+ for( int i = 0; i < num_filenames; ++i )
+ {
+ struct stat in_stats;
+ output_filename[0] = 0;
+
+ if( !filenames[i][0] || !strcmp( filenames[i], "-" ) )
+ {
+ input_filename = "";
+ infd = STDIN_FILENO;
+ if( program_mode != m_test )
+ {
+ if( to_stdout || !default_output_filename[0] )
+ outfd = STDOUT_FILENO;
+ else
+ {
+ if( program_mode == m_compress )
+ set_c_outname( default_output_filename, volume_size != LLONG_MAX );
+ else
+ {
+ output_filename = resize_buffer( output_filename,
+ strlen( default_output_filename ) + 1 );
+ strcpy( output_filename, default_output_filename );
+ }
+ if( !open_outstream( force ) )
+ {
+ if( outfd == -1 && retval < 1 ) retval = 1;
+ close( infd ); infd = -1;
+ continue;
+ }
+ }
+ }
+ }
+ else
+ {
+ input_filename = filenames[i];
+ const int eindex = extension_index( input_filename );
+ infd = open_instream( input_filename, &in_stats, program_mode,
+ eindex, force, to_stdout );
+ if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
+ if( program_mode != m_test )
+ {
+ if( to_stdout ) outfd = STDOUT_FILENO;
+ else
+ {
+ if( program_mode == m_compress )
+ set_c_outname( input_filename, volume_size != LLONG_MAX );
+ else set_d_outname( input_filename, eindex );
+ if( !open_outstream( force ) )
+ {
+ if( outfd == -1 && retval < 1 ) retval = 1;
+ close( infd ); infd = -1;
+ continue;
+ }
+ }
+ }
+ }
+
+ if( !check_tty( infd, program_mode ) ) return 1;
+
+ if( output_filename[0] && !to_stdout && program_mode != m_test )
+ delete_output_on_interrupt = true;
+ const struct stat * const in_statsp = input_filename[0] ? &in_stats : 0;
+ Pp_set_name( &pp, input_filename );
+ int tmp = 0;
+ if( program_mode == m_compress )
+ tmp = compress( member_size, volume_size, &encoder_options, infd,
+ &pp, in_statsp );
+ else
+ tmp = decompress( infd, &pp, program_mode == m_test );
+ if( tmp > retval ) retval = tmp;
+ if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
+
+ if( delete_output_on_interrupt )
+ close_and_set_permissions( in_statsp );
+ if( input_filename[0] )
+ {
+ close( infd ); infd = -1;
+ if( !keep_input_files && !to_stdout && program_mode != m_test )
+ remove( input_filename );
+ }
+ }
+ if( outfd >= 0 && close( outfd ) != 0 )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: Can't close stdout: %s.\n",
+ program_name, strerror( errno ) );
+ if( retval < 1 ) retval = 1;
+ }
+ free( output_filename );
+ free( filenames );
+ ap_free( &parser );
+ return retval;
+ }