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-rw-r--r--main.c1036
-rw-r--r--main.cc966
2 files changed, 1036 insertions, 966 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..fe31871
--- /dev/null
+++ b/main.c
@@ -0,0 +1,1036 @@
+/* Minilzip - A test program for the lzlib library
+ Copyright (C) 2009, 2010, 2011, 2012 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 minilzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+
+#include "carg_parser.h"
+#include "lzlib.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
+
+#ifndef min
+ #define min(x,y) ((x) <= (y) ? (x) : (y))
+#endif
+
+long long int llabs( long long int number );
+
+
+const char * const Program_name = "Minilzip";
+const char * const program_name = "minilzip";
+const char * const program_year = "2012";
+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 } };
+
+struct Lzma_options
+ {
+ int dictionary_size; /* 4KiB..512MiB */
+ int match_len_limit; /* 5..273 */
+ };
+
+enum Mode { m_compress, m_decompress, m_test };
+
+char * output_filename = 0;
+int outfd = -1;
+int verbosity = 0;
+const mode_t usr_rw = S_IRUSR | S_IWUSR;
+const mode_t all_rw = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+mode_t outfd_mode = S_IRUSR | S_IWUSR;
+bool delete_output_on_interrupt = false;
+
+
+struct Pretty_print
+ {
+ const char * name;
+ const char * stdin_name;
+ int longest_name;
+ bool first_post;
+ };
+
+static void Pp_init( struct Pretty_print * const pp,
+ const char * const filenames[], const int num_filenames )
+ {
+ unsigned int stdin_name_len;
+ int i;
+ pp->name = 0;
+ pp->stdin_name = "(stdin)";
+ pp->longest_name = 0;
+ 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;
+ }
+
+
+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; }
+
+
+static 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 );
+ }
+ }
+
+
+static void show_help( void )
+ {
+ printf( "%s - A test program for the lzlib library.\n", Program_name );
+ printf( "\nUsage: %s [options] [files]\n", invocation_name );
+ printf( "\nOptions:\n"
+ " -h, --help display this help and exit\n"
+ " -V, --version output version information and exit\n"
+ " -b, --member-size=<bytes> set member size limit in bytes\n"
+ " -c, --stdout send output to standard output\n"
+ " -d, --decompress decompress\n"
+ " -f, --force overwrite existing output files\n"
+ " -F, --recompress force recompression of compressed files\n"
+ " -k, --keep keep (don't delete) input files\n"
+ " -m, --match-length=<bytes> set match length limit in bytes [36]\n"
+ " -o, --output=<file> if reading stdin, place the output into <file>\n"
+ " -q, --quiet suppress all messages\n"
+ " -s, --dictionary-size=<bytes> set dictionary size limit in bytes [8MiB]\n"
+ " -S, --volume-size=<bytes> set volume size limit in bytes\n"
+ " -t, --test test compressed file integrity\n"
+ " -v, --verbose be verbose (a 2nd -v gives more)\n"
+ " -1 .. -9 set compression level [default 6]\n"
+ " --fast alias for -1\n"
+ " --best alias for -9\n"
+ "If no file names are given, minilzip compresses or decompresses\n"
+ "from standard input to standard output.\n"
+ "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n"
+ "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n"
+ "The bidimensional parameter space of LZMA can't be mapped to a linear\n"
+ "scale optimal for all files. If your files are large, very repetitive,\n"
+ "etc, you may need to use the --match-length and --dictionary-size\n"
+ "options directly to achieve optimal performance.\n"
+ "\nReport bugs to lzip-bug@nongnu.org\n"
+ "Lzlib home page: http://www.nongnu.org/lzip/lzlib.html\n" );
+ }
+
+
+static void show_version( void )
+ {
+ printf( "%s %s\n", Program_name, PROGVERSION );
+ printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+ printf( "Using Lzlib %s\n", LZ_version() );
+ printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n"
+ "This is free software: you are free to change and redistribute it.\n"
+ "There is NO WARRANTY, to the extent permitted by law.\n" );
+ }
+
+
+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 );
+ }
+
+
+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 = "";
+ bool exact = ( num % factor == 0 );
+ int i;
+
+ for( i = 0; i < 8 && ( llabs( num ) > 9999 ||
+ ( exact && llabs( num ) >= factor ) ); ++i )
+ { num /= factor; if( num % factor != 0 ) exact = false; p = prefix[i]; }
+ snprintf( buf, buf_size, "%lld %s", num, p );
+ return buf;
+ }
+
+
+static long long getnum( const char * const ptr,
+ const long long llimit, const long long ulimit )
+ {
+ long long result;
+ char *tail;
+ errno = 0;
+ 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;
+ int i;
+ bool bad_multiplier = false;
+ switch( tail[0] )
+ {
+ case ' ': 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( 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 >= LZ_min_dictionary_bits() &&
+ bits <= LZ_max_dictionary_bits() && *tail == 0 )
+ return ( 1 << bits );
+ return getnum( arg, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
+ }
+
+
+static int open_instream( const char * const name, struct stat * const in_statsp,
+ const enum Mode program_mode, const int eindex,
+ const bool recompress, const bool to_stdout )
+ {
+ int infd = -1;
+ if( program_mode == m_compress && !recompress && 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;
+ 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;
+ }
+
+
+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 && errno != ENOENT )
+ show_error( "WARNING: deletion of output file (apparently) failed.", 0, false );
+ }
+ exit( retval );
+ }
+
+
+/* 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 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 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 )
+ {
+ 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 >= 1 )
+ 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 );
+ }
+
+
+static bool check_tty( const int infd, const enum Mode program_mode )
+ {
+ if( program_mode == m_compress && outfd >= 0 && 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 warning = false;
+ if( in_statsp )
+ {
+ /* fchown will in many cases return with EPERM, which can be safely ignored. */
+ if( ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
+ errno != EPERM ) ||
+ fchmod( outfd, in_statsp->st_mode ) != 0 ) warning = true;
+ }
+ if( close( outfd ) != 0 ) cleanup_and_fail( 1 );
+ outfd = -1;
+ delete_output_on_interrupt = false;
+ if( in_statsp )
+ {
+ struct utimbuf t;
+ t.actime = in_statsp->st_atime;
+ t.modtime = in_statsp->st_mtime;
+ if( utime( output_filename, &t ) != 0 ) warning = true;
+ }
+ if( warning && verbosity >= 1 )
+ show_error( "Can't change output file attributes.", 0, false );
+ }
+
+
+/* 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( n < 0 && errno != EINTR && errno != EAGAIN ) break;
+ }
+ return ( rest > 0 ) ? size - rest : size;
+ }
+
+
+static bool next_filename( void )
+ {
+ const unsigned int len = strlen( known_extensions[0].from );
+ int i, j;
+
+ if( strlen( output_filename ) >= len + 5 ) /* "*00001.lz" */
+ for( 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 do_compress( struct LZ_Encoder * const encoder, const long long member_size,
+ const long long volume_size, const int infd,
+ struct Pretty_print * const pp,
+ const struct stat * const in_statsp )
+ {
+ long long partial_volume_size = 0;
+ enum { buffer_size = 65536 };
+ uint8_t buffer[buffer_size];
+
+ if( verbosity >= 1 ) Pp_show_msg( pp, 0 );
+ while( true )
+ {
+ int in_size = 0;
+ while( LZ_compress_write_size( encoder ) > 0 )
+ {
+ const int size = min( LZ_compress_write_size( encoder ), buffer_size );
+ const int rd = readblock( infd, buffer, size );
+ if( rd != size && errno )
+ {
+ Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
+ return 1;
+ }
+ if( rd > 0 && rd != LZ_compress_write( encoder, buffer, rd ) )
+ internal_error( "library error (LZ_compress_write)" );
+ if( rd < size ) LZ_compress_finish( encoder );
+/* else LZ_compress_sync_flush( encoder ); */
+ in_size += rd;
+ }
+ const int out_size = LZ_compress_read( encoder, buffer, buffer_size );
+ if( out_size < 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: LZ_compress_read error: %s.\n",
+ program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
+ return 1;
+ }
+ else if( out_size > 0 )
+ {
+ const int wr = writeblock( outfd, buffer, out_size );
+ if( wr != out_size )
+ {
+ Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
+ return 1;
+ }
+ }
+ else if( in_size == 0 ) internal_error( "library error (LZ_compress_read)" );
+ if( LZ_compress_member_finished( encoder ) )
+ {
+ if( LZ_compress_finished( encoder ) == 1 ) break;
+ partial_volume_size += LZ_compress_member_position( encoder );
+ if( partial_volume_size >= volume_size - LZ_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, "Too many volume files" ); return 1; }
+ if( !open_outstream( true ) ) return 1;
+ delete_output_on_interrupt = true;
+ }
+ }
+ const long long size =
+ min( member_size, volume_size - partial_volume_size );
+ if( LZ_compress_restart_member( encoder, size ) < 0 )
+ {
+ Pp_show_msg( pp, 0 );
+ if( verbosity >= 0 )
+ fprintf( stderr, "%s: LZ_compress_restart_member error: %s.\n",
+ program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
+ return 1;
+ }
+ }
+ }
+
+ if( verbosity >= 1 )
+ {
+ const long long in_size = LZ_compress_total_in_size( encoder );
+ const long long out_size = LZ_compress_total_out_size( encoder );
+ 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 );
+ }
+ return 0;
+ }
+
+
+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 )
+ {
+ struct LZ_Encoder * const encoder =
+ LZ_compress_open( encoder_options->dictionary_size,
+ encoder_options->match_len_limit,
+ min( member_size, volume_size ) );
+ int retval;
+
+ if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
+ {
+ if( !encoder || LZ_compress_errno( encoder ) == LZ_mem_error )
+ Pp_show_msg( pp, "Not enough memory. Try a smaller dictionary size" );
+ else
+ internal_error( "invalid argument to encoder" );
+ retval = 1;
+ }
+ else retval = do_compress( encoder, member_size, volume_size,
+ infd, pp, in_statsp );
+ LZ_compress_close( encoder );
+ return retval;
+ }
+
+
+int do_decompress( struct LZ_Decoder * const decoder, const int infd,
+ struct Pretty_print * const pp, const bool testing )
+ {
+ enum { buffer_size = 65536 };
+ uint8_t buffer[buffer_size];
+ bool first_member;
+
+ for( first_member = true; ; )
+ {
+ int in_size = min( LZ_decompress_write_size( decoder ), buffer_size );
+ if( in_size > 0 )
+ {
+ const int max_in_size = in_size;
+ in_size = readblock( infd, buffer, max_in_size );
+ if( in_size != max_in_size && errno )
+ {
+ Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
+ return 1;
+ }
+ if( in_size > 0 && in_size != LZ_decompress_write( decoder, buffer, in_size ) )
+ internal_error( "library error (LZ_decompress_write)" );
+ if( in_size < max_in_size ) LZ_decompress_finish( decoder );
+ }
+ int out_size = 0;
+ while( true )
+ {
+ const int rd = LZ_decompress_read( decoder, buffer, buffer_size );
+ if( rd > 0 )
+ {
+ out_size += rd;
+ if( outfd >= 0 )
+ {
+ const int wr = writeblock( outfd, buffer, rd );
+ if( wr != rd )
+ {
+ Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
+ return 1;
+ }
+ }
+ }
+ else if( rd < 0 ) { out_size = rd; break; }
+ if( verbosity >= 1 && LZ_decompress_member_finished( decoder ) == 1 )
+ {
+ const long long data_position = LZ_decompress_data_position( decoder );
+ const long long member_size = LZ_decompress_member_position( decoder );
+ Pp_show_msg( pp, 0 );
+ if( verbosity >= 2 )
+ fprintf( stderr, "version %d, dictionary size %7sB. ",
+ LZ_decompress_member_version( decoder ),
+ format_num( LZ_decompress_dictionary_size( decoder ) ) );
+ if( verbosity >= 3 && data_position > 0 && member_size > 0 )
+ fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ",
+ (double)data_position / member_size,
+ ( 8.0 * member_size ) / data_position,
+ 100.0 * ( 1.0 - ( (double)member_size / data_position ) ) );
+ if( verbosity >= 4 )
+ fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld. ",
+ LZ_decompress_data_crc( decoder ),
+ data_position, member_size );
+ if( testing ) fprintf( stderr, "ok\n" );
+ else fprintf( stderr, "done\n" );
+ }
+ if( LZ_decompress_member_finished( decoder ) == 1 )
+ { first_member = false; Pp_reset( pp ); }
+ if( rd <= 0 ) break;
+ }
+ if( out_size < 0 )
+ {
+ const enum LZ_Errno lz_errno = LZ_decompress_errno( decoder );
+ if( lz_errno == LZ_header_error )
+ {
+ if( !first_member ) break; /* trailing garbage */
+ Pp_show_msg( pp, "Error reading member header" );
+ return 1;
+ }
+ if( lz_errno == LZ_mem_error )
+ {
+ Pp_show_msg( pp, "Not enough memory. Find a machine with more memory" );
+ return 1;
+ }
+ Pp_show_msg( pp, 0 );
+ if( lz_errno == LZ_unexpected_eof )
+ {
+ if( verbosity >= 0 )
+ fprintf( stderr, "File ends unexpectedly at pos %lld\n",
+ LZ_decompress_total_in_size( decoder ) );
+ return 2;
+ }
+ if( verbosity >= 0 )
+ fprintf( stderr, "LZ_decompress_read error: %s.\n",
+ LZ_strerror( LZ_decompress_errno( decoder ) ) );
+ return 1;
+ }
+ if( LZ_decompress_finished( decoder ) == 1 ) break;
+ if( in_size == 0 && out_size == 0 )
+ internal_error( "library error (LZ_decompress_read)" );
+ }
+ return 0;
+ }
+
+
+int decompress( const int infd, struct Pretty_print * const pp,
+ const bool testing )
+ {
+ struct LZ_Decoder * const decoder = LZ_decompress_open();
+ int retval;
+
+ if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+ {
+ Pp_show_msg( pp, "Not enough memory. Find a machine with more memory" );
+ retval = 1;
+ }
+ else retval = do_decompress( decoder, infd, pp, testing );
+
+ LZ_decompress_close( decoder );
+ 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( void )
+ {
+ signal( SIGHUP, signal_handler );
+ signal( SIGINT, signal_handler );
+ signal( SIGTERM, signal_handler );
+ }
+
+
+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, 5 }, /* -0 */
+ { 1 << 20, 5 }, /* -1 */
+ { 3 << 19, 6 }, /* -2 */
+ { 1 << 21, 8 }, /* -3 */
+ { 3 << 20, 12 }, /* -4 */
+ { 1 << 22, 20 }, /* -5 */
+ { 1 << 23, 36 }, /* -6 */
+ { 1 << 24, 68 }, /* -7 */
+ { 3 << 23, 132 }, /* -8 */
+ { 1 << 25, 273 } }; /* -9 */
+ struct Lzma_options encoder_options = option_mapping[6]; /* default = "-6" */
+ long long member_size = LLONG_MAX;
+ long long volume_size = LLONG_MAX;
+ const char * input_filename = "";
+ const char * default_output_filename = "";
+ const char ** filenames = 0;
+ int num_filenames = 0;
+ int infd = -1;
+ enum Mode program_mode = m_compress;
+ int argind = 0;
+ int retval = 0;
+ int i;
+ bool filenames_given = false;
+ bool force = false;
+ bool keep_input_files = false;
+ bool recompress = false;
+ bool to_stdout = false;
+ struct Pretty_print pp;
+
+ const struct ap_Option options[] =
+ {
+ { '0', "fast", ap_no },
+ { '1', 0, 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 },
+ { 'F', "recompress", 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;
+
+ invocation_name = argv[0];
+ if( LZ_version()[0] != LZ_version_string[0] )
+ internal_error( "bad library version" );
+ if( strcmp( PROGVERSION, LZ_version_string ) )
+ internal_error( "bad library version_string" );
+
+ 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 '0':
+ case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ encoder_options = option_mapping[code-'0']; break;
+ case 'b': member_size = getnum( arg, 100000, LLONG_MAX / 2 ); break;
+ case 'c': to_stdout = true; break;
+ case 'd': program_mode = m_decompress; break;
+ case 'f': force = true; break;
+ case 'F': recompress = true; break;
+ case 'h': show_help(); return 0;
+ case 'k': keep_input_files = true; break;
+ case 'm': encoder_options.match_len_limit =
+ getnum( arg, LZ_min_match_len_limit(),
+ LZ_max_match_len_limit() ); break;
+ case 'o': default_output_filename = arg; break;
+ case 'q': verbosity = -1; break;
+ case 's': encoder_options.dictionary_size = get_dict_size( arg );
+ break;
+ case 'S': volume_size = getnum( arg, 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" );
+ }
+ } /* end process options */
+
+#if defined(__OS2__)
+ _fsetmode( stdin, "b" );
+ _fsetmode( stdout, "b" );
+#endif
+
+ if( program_mode == m_test )
+ outfd = -1;
+
+ 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();
+
+ Pp_init( &pp, filenames, num_filenames );
+
+ 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( 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 );
+ }
+ outfd_mode = all_rw;
+ if( !open_outstream( force ) )
+ {
+ if( outfd == -1 && retval < 1 ) retval = 1;
+ close( infd ); infd = -1;
+ continue;
+ }
+ }
+ }
+ }
+ else
+ {
+ const int eindex = extension_index( filenames[i] );
+ input_filename = filenames[i];
+ infd = open_instream( input_filename, &in_stats, program_mode,
+ eindex, recompress, 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 );
+ outfd_mode = usr_rw;
+ 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;
+ in_statsp = input_filename[0] ? &in_stats : 0;
+ Pp_set_name( &pp, input_filename );
+ 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 )
+ {
+ 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/main.cc b/main.cc
deleted file mode 100644
index 5c5d572..0000000
--- a/main.cc
+++ /dev/null
@@ -1,966 +0,0 @@
-/* Minilzip - A test program for the lzlib library
- Copyright (C) 2009, 2010, 2011 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 minilzip to panic.
-*/
-
-#define _FILE_OFFSET_BITS 64
-
-#include <algorithm>
-#include <cerrno>
-#include <climits>
-#include <csignal>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <string>
-#include <vector>
-#include <fcntl.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <utime.h>
-#include <sys/stat.h>
-
-#include "arg_parser.h"
-#include "lzlib.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
-
-void show_error( const char * const msg, const int errcode = 0, const bool help = false ) throw();
-void internal_error( const char * const msg );
-int readblock( const int fd, uint8_t * const buf, const int size ) throw();
-int writeblock( const int fd, const uint8_t * const buf, const int size ) throw();
-
-
-namespace {
-
-const char * const Program_name = "Minilzip";
-const char * const program_name = "minilzip";
-const char * const program_year = "2011";
-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 } };
-
-struct Lzma_options
- {
- int dictionary_size; // 4KiB..512MiB
- int match_len_limit; // 5..273
- };
-
-enum Mode { m_compress, m_decompress, m_test };
-
-std::string output_filename;
-int outfd = -1;
-int verbosity = 0;
-mode_t outfd_mode = S_IRUSR | S_IWUSR;
-bool delete_output_on_interrupt = false;
-
-class Pretty_print
- {
- const char * const stdin_name;
- unsigned int longest_name;
- std::string name_;
- mutable bool first_post;
-
-public:
- Pretty_print( const std::vector< std::string > & filenames )
- : stdin_name( "(stdin)" ), longest_name( 0 ), first_post( false )
- {
- const unsigned int stdin_name_len = std::strlen( stdin_name );
- for( unsigned int i = 0; i < filenames.size(); ++i )
- {
- const std::string & s = filenames[i];
- const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() );
- if( len > longest_name ) longest_name = len;
- }
- if( longest_name == 0 ) longest_name = stdin_name_len;
- }
-
- void set_name( const std::string & filename )
- {
- if( filename.size() && filename != "-" ) name_ = filename;
- else name_ = stdin_name;
- first_post = true;
- }
-
- void reset() const throw() { if( name_.size() ) first_post = true; }
- const char * name() const throw() { return name_.c_str(); }
- void operator()( const char * const msg = 0 ) const throw();
- };
-
-
-void show_help() throw()
- {
- std::printf( "%s - A test program for the lzlib library.\n", Program_name );
- std::printf( "\nUsage: %s [options] [files]\n", invocation_name );
- std::printf( "\nOptions:\n" );
- std::printf( " -h, --help display this help and exit\n" );
- std::printf( " -V, --version output version information and exit\n" );
- std::printf( " -b, --member-size=<n> set member size limit in bytes\n" );
- std::printf( " -c, --stdout send output to standard output\n" );
- std::printf( " -d, --decompress decompress\n" );
- std::printf( " -f, --force overwrite existing output files\n" );
- std::printf( " -F, --recompress force recompression of compressed files\n" );
- std::printf( " -k, --keep keep (don't delete) input files\n" );
- std::printf( " -m, --match-length=<n> set match length limit in bytes [36]\n" );
- std::printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" );
- std::printf( " -q, --quiet suppress all messages\n" );
- std::printf( " -s, --dictionary-size=<n> set dictionary size limit in bytes [8MiB]\n" );
- std::printf( " -S, --volume-size=<n> set volume size limit in bytes\n" );
- std::printf( " -t, --test test compressed file integrity\n" );
- std::printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" );
- std::printf( " -1 .. -9 set compression level [default 6]\n" );
- std::printf( " --fast alias for -1\n" );
- std::printf( " --best alias for -9\n" );
- std::printf( "If no file names are given, %s compresses or decompresses\n", program_name );
- std::printf( "from standard input to standard output.\n" );
- std::printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" );
- std::printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" );
- std::printf( "\nReport bugs to lzip-bug@nongnu.org\n" );
- std::printf( "Lzlib home page: http://www.nongnu.org/lzip/lzlib.html\n" );
- }
-
-
-void show_version() throw()
- {
- std::printf( "%s %s\n", Program_name, PROGVERSION );
- std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
- std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" );
- std::printf( "This is free software: you are free to change and redistribute it.\n" );
- std::printf( "There is NO WARRANTY, to the extent permitted by law.\n" );
- }
-
-
-const char * format_num( long long num ) throw()
- {
- 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 = "";
-
- for( int 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;
- }
-
-
-long long getnum( const char * const ptr,
- const long long llimit = LLONG_MIN + 1,
- const long long ulimit = LLONG_MAX ) throw()
- {
- errno = 0;
- char *tail;
- long long result = strtoll( ptr, &tail, 0 );
- if( tail == ptr )
- {
- show_error( "Bad or missing numerical argument.", 0, true );
- std::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 '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 );
- std::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." );
- std::exit( 1 );
- }
- return result;
- }
-
-
-int get_dict_size( const char * const arg ) throw()
- {
- char *tail;
- int bits = std::strtol( arg, &tail, 0 );
- if( bits >= LZ_min_dictionary_bits() &&
- bits <= LZ_max_dictionary_bits() && *tail == 0 )
- return ( 1 << bits );
- return getnum( arg, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
- }
-
-
-int extension_index( const std::string & name ) throw()
- {
- for( int i = 0; known_extensions[i].from; ++i )
- {
- const std::string ext( known_extensions[i].from );
- if( name.size() > ext.size() &&
- name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
- return i;
- }
- return -1;
- }
-
-
-int open_instream( const std::string & name, struct stat * const in_statsp,
- const Mode program_mode, const int eindex,
- const bool recompress, const bool to_stdout ) throw()
- {
- int infd = -1;
- if( program_mode == m_compress && !recompress && eindex >= 0 )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Input file `%s' already has `%s' suffix.\n",
- program_name, name.c_str(),
- known_extensions[eindex].from );
- }
- else
- {
- infd = open( name.c_str(), O_RDONLY | o_binary );
- if( infd < 0 )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
- program_name, name.c_str(), std::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 )
- std::fprintf( stderr, "%s: Input file `%s' is not a regular file%s.\n",
- program_name, name.c_str(),
- ( can_read && !to_stdout ) ?
- " and `--stdout' was not specified" : "" );
- close( infd );
- infd = -1;
- }
- }
- }
- return infd;
- }
-
-
-void set_c_outname( const std::string & name, const bool multifile ) throw()
- {
- output_filename = name;
- if( multifile ) output_filename += "00001";
- output_filename += known_extensions[0].from;
- }
-
-
-void set_d_outname( const std::string & name, const int i ) throw()
- {
- if( i >= 0 )
- {
- const std::string from( known_extensions[i].from );
- if( name.size() > from.size() )
- {
- output_filename.assign( name, 0, name.size() - from.size() );
- output_filename += known_extensions[i].to;
- return;
- }
- }
- output_filename = name; output_filename += ".out";
- if( verbosity >= 1 )
- std::fprintf( stderr, "%s: Can't guess original name for `%s' -- using `%s'.\n",
- program_name, name.c_str(), output_filename.c_str() );
- }
-
-
-bool open_outstream( const bool force ) throw()
- {
- int flags = O_CREAT | O_WRONLY | o_binary;
- if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
-
- outfd = open( output_filename.c_str(), flags, outfd_mode );
- if( outfd < 0 && verbosity >= 0 )
- {
- if( errno == EEXIST )
- std::fprintf( stderr, "%s: Output file `%s' already exists, skipping.\n",
- program_name, output_filename.c_str() );
- else
- std::fprintf( stderr, "%s: Can't create output file `%s': %s.\n",
- program_name, output_filename.c_str(), std::strerror( errno ) );
- }
- return ( outfd >= 0 );
- }
-
-
-bool check_tty( const int infd, const Mode program_mode ) throw()
- {
- if( program_mode == m_compress && outfd >= 0 && 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;
- }
-
-
-void cleanup_and_fail( const int retval ) throw()
- {
- if( delete_output_on_interrupt )
- {
- delete_output_on_interrupt = false;
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
- program_name, output_filename.c_str() );
- if( outfd >= 0 ) { close( outfd ); outfd = -1; }
- if( std::remove( output_filename.c_str() ) != 0 && errno != ENOENT )
- show_error( "WARNING: deletion of output file (apparently) failed." );
- }
- std::exit( retval );
- }
-
-
- // Set permissions, owner and times.
-void close_and_set_permissions( const struct stat * const in_statsp )
- {
- bool error = false;
- if( in_statsp )
- {
- if( ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
- errno != EPERM ) ||
- fchmod( outfd, in_statsp->st_mode ) != 0 )
- 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.c_str(), &t ) != 0 ) error = true;
- }
- if( error )
- {
- show_error( "Can't change output file attributes." );
- cleanup_and_fail( 1 );
- }
- }
-
-
-bool next_filename()
- {
- const unsigned int len = std::strlen( known_extensions[0].from );
- if( output_filename.size() >= len + 5 ) // "*00001.lz"
- for( int i = output_filename.size() - 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;
- }
-
-
-int do_compress( LZ_Encoder * const encoder, const long long member_size,
- const long long volume_size, const int infd,
- const Pretty_print & pp, const struct stat * const in_statsp )
- {
- long long partial_volume_size = 0;
- const int buffer_size = 65536;
- uint8_t buffer[buffer_size];
-
- if( verbosity >= 1 ) pp();
- while( true )
- {
- int in_size = 0;
- while( LZ_compress_write_size( encoder ) > 0 )
- {
- const int size = std::min( LZ_compress_write_size( encoder ),
- buffer_size );
- const int rd = readblock( infd, buffer, size );
- if( rd != size && errno )
- { pp(); show_error( "Read error", errno ); return 1; }
- if( rd > 0 && rd != LZ_compress_write( encoder, buffer, rd ) )
- internal_error( "library error (LZ_compress_write)" );
- if( rd < size ) LZ_compress_finish( encoder );
-// else LZ_compress_sync_flush( encoder );
- in_size += rd;
- }
- const int out_size = LZ_compress_read( encoder, buffer, buffer_size );
- if( out_size < 0 )
- {
- pp();
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: LZ_compress_read error: %s.\n",
- program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
- return 1;
- }
- else if( out_size > 0 )
- {
- const int wr = writeblock( outfd, buffer, out_size );
- if( wr != out_size )
- { pp(); show_error( "Write error", errno ); return 1; }
- }
- else if( in_size == 0 ) internal_error( "library error (LZ_compress_read)" );
- if( LZ_compress_member_finished( encoder ) )
- {
- if( LZ_compress_finished( encoder ) == 1 ) break;
- partial_volume_size += LZ_compress_member_position( encoder );
- if( partial_volume_size >= volume_size - LZ_min_dictionary_size() )
- {
- partial_volume_size = 0;
- if( delete_output_on_interrupt )
- {
- close_and_set_permissions( in_statsp );
- if( !next_filename() )
- { pp( "Too many volume files." ); return 1; }
- if( !open_outstream( true ) ) return 1;
- delete_output_on_interrupt = true;
- }
- }
- const long long size =
- std::min( member_size, volume_size - partial_volume_size );
- if( LZ_compress_restart_member( encoder, size ) < 0 )
- {
- pp();
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: LZ_compress_restart_member error: %s.\n",
- program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
- return 1;
- }
- }
- }
-
- if( verbosity >= 1 )
- {
- const long long in_size = LZ_compress_total_in_size( encoder );
- const long long out_size = LZ_compress_total_out_size( encoder );
- if( in_size <= 0 || out_size <= 0 )
- std::fprintf( stderr, "No data compressed.\n" );
- else
- std::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 );
- }
- return 0;
- }
-
-
-int compress( const long long member_size, const long long volume_size,
- const Lzma_options & encoder_options, const int infd,
- const Pretty_print & pp, const struct stat * const in_statsp )
- {
- LZ_Encoder * const encoder =
- LZ_compress_open( encoder_options.dictionary_size,
- encoder_options.match_len_limit,
- std::min( member_size, volume_size ) );
- int retval;
-
- if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
- {
- if( !encoder || LZ_compress_errno( encoder ) == LZ_mem_error )
- pp( "Not enough memory. Try a smaller dictionary size" );
- else
- internal_error( "invalid argument to encoder" );
- retval = 1;
- }
- else retval = do_compress( encoder, member_size, volume_size,
- infd, pp, in_statsp );
- LZ_compress_close( encoder );
- return retval;
- }
-
-
-int do_decompress( LZ_Decoder * const decoder, const int infd,
- const Pretty_print & pp, const bool testing )
- {
- const int buffer_size = 65536;
- uint8_t buffer[buffer_size];
-
- while( true )
- {
- int in_size = std::min( LZ_decompress_write_size( decoder ), buffer_size );
- if( in_size > 0 )
- {
- const int max_in_size = in_size;
- in_size = readblock( infd, buffer, max_in_size );
- if( in_size != max_in_size && errno )
- { pp(); show_error( "Read error", errno ); return 1; }
- if( in_size > 0 && in_size != LZ_decompress_write( decoder, buffer, in_size ) )
- internal_error( "library error (LZ_decompress_write)" );
- if( in_size < max_in_size ) LZ_decompress_finish( decoder );
- }
- int out_size = 0;
- while( true )
- {
- const int rd = LZ_decompress_read( decoder, buffer, buffer_size );
- if( rd > 0 )
- {
- out_size += rd;
- if( outfd >= 0 )
- {
- const int wr = writeblock( outfd, buffer, rd );
- if( wr != rd )
- { pp(); show_error( "Write error", errno ); return 1; }
- }
- }
- else if( rd < 0 ) { out_size = rd; break; }
- if( verbosity >= 1 && LZ_decompress_member_finished( decoder ) == 1 )
- {
- const long long data_position = LZ_decompress_data_position( decoder );
- const long long member_size = LZ_decompress_member_position( decoder );
- pp();
- if( verbosity >= 2 )
- std::fprintf( stderr, "version %d, dictionary size %7sB. ",
- LZ_decompress_member_version( decoder ),
- format_num( LZ_decompress_dictionary_size( decoder ) ) );
- if( verbosity >= 3 && data_position > 0 && member_size > 0 )
- std::fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ",
- (double)data_position / member_size,
- ( 8.0 * member_size ) / data_position,
- 100.0 * ( 1.0 - ( (double)member_size / data_position ) ) );
- if( verbosity >= 4 )
- std::fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld. ",
- LZ_decompress_data_crc( decoder ),
- data_position, member_size );
- if( testing ) std::fprintf( stderr, "ok\n" );
- else std::fprintf( stderr, "done\n" );
- pp.reset();
- }
- if( rd <= 0 ) break;
- }
- if( out_size < 0 )
- {
- const LZ_Errno lz_errno = LZ_decompress_errno( decoder );
- if( lz_errno == LZ_header_error )
- {
- if( LZ_decompress_total_out_size( decoder ) > 0 )
- break; // trailing garbage
- pp( "Error reading member header" );
- return 1;
- }
- if( lz_errno == LZ_mem_error )
- {
- pp( "Not enough memory. Find a machine with more memory" );
- return 1;
- }
- pp();
- if( lz_errno == LZ_unexpected_eof )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "File ends unexpectedly at pos %lld\n",
- LZ_decompress_total_in_size( decoder ) );
- return 2;
- }
- if( verbosity >= 0 )
- std::fprintf( stderr, "LZ_decompress_read error: %s.\n",
- LZ_strerror( LZ_decompress_errno( decoder ) ) );
- return 1;
- }
- if( LZ_decompress_finished( decoder ) == 1 ) break;
- if( in_size == 0 && out_size == 0 )
- internal_error( "library error (LZ_decompress_read)" );
- }
- return 0;
- }
-
-
-int decompress( const int infd, const Pretty_print & pp,
- const bool testing )
- {
- LZ_Decoder * const decoder = LZ_decompress_open();
- int retval;
-
- if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
- {
- pp( "Not enough memory. Find a machine with more memory" );
- retval = 1;
- }
- else retval = do_decompress( decoder, infd, pp, testing );
-
- LZ_decompress_close( decoder );
- return retval;
- }
-
-
-extern "C" void signal_handler( int ) throw()
- {
- show_error( "Control-C or similar caught, quitting." );
- cleanup_and_fail( 1 );
- }
-
-
-void set_signals() throw()
- {
- std::signal( SIGHUP, signal_handler );
- std::signal( SIGINT, signal_handler );
- std::signal( SIGTERM, signal_handler );
- }
-
-} // end namespace
-
-
-void Pretty_print::operator()( const char * const msg ) const throw()
- {
- if( verbosity >= 0 )
- {
- if( first_post )
- {
- first_post = false;
- std::fprintf( stderr, " %s: ", name_.c_str() );
- for( unsigned int i = 0; i < longest_name - name_.size(); ++i )
- std::fprintf( stderr, " " );
- if( !msg ) std::fflush( stderr );
- }
- if( msg ) std::fprintf( stderr, "%s.\n", msg );
- }
- }
-
-
-void show_error( const char * const msg, const int errcode, const bool help ) throw()
- {
- if( verbosity >= 0 )
- {
- if( msg && msg[0] )
- {
- std::fprintf( stderr, "%s: %s", program_name, msg );
- if( errcode > 0 )
- std::fprintf( stderr, ": %s", std::strerror( errcode ) );
- std::fprintf( stderr, "\n" );
- }
- if( help && invocation_name && invocation_name[0] )
- std::fprintf( stderr, "Try `%s --help' for more information.\n",
- invocation_name );
- }
- }
-
-
-void internal_error( const char * const msg )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: internal error: %s.\n", program_name, msg );
- std::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 ) throw()
- {
- 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 ) throw()
- {
- 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;
- }
-
-
-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 Lzma_options option_mapping[] =
- {
- { 1 << 20, 5 }, // -0
- { 1 << 20, 5 }, // -1
- { 3 << 19, 6 }, // -2
- { 1 << 21, 8 }, // -3
- { 3 << 20, 12 }, // -4
- { 1 << 22, 20 }, // -5
- { 1 << 23, 36 }, // -6
- { 1 << 24, 68 }, // -7
- { 3 << 23, 132 }, // -8
- { 1 << 25, 273 } }; // -9
- Lzma_options encoder_options = option_mapping[6]; // default = "-6"
- long long member_size = LLONG_MAX;
- long long volume_size = LLONG_MAX;
- int infd = -1;
- Mode program_mode = m_compress;
- bool force = false;
- bool keep_input_files = false;
- bool recompress = false;
- bool to_stdout = false;
- std::string input_filename;
- std::string default_output_filename;
- std::vector< std::string > filenames;
- invocation_name = argv[0];
-
- if( LZ_version()[0] != LZ_version_string[0] )
- internal_error( "bad library version" );
-
- if( std::strcmp( PROGVERSION, LZ_version_string ) )
- internal_error( "bad library version_string" );
-
- const Arg_parser::Option options[] =
- {
- { '0', "fast", Arg_parser::no },
- { '1', 0, Arg_parser::no },
- { '2', 0, Arg_parser::no },
- { '3', 0, Arg_parser::no },
- { '4', 0, Arg_parser::no },
- { '5', 0, Arg_parser::no },
- { '6', 0, Arg_parser::no },
- { '7', 0, Arg_parser::no },
- { '8', 0, Arg_parser::no },
- { '9', "best", Arg_parser::no },
- { 'b', "member-size", Arg_parser::yes },
- { 'c', "stdout", Arg_parser::no },
- { 'd', "decompress", Arg_parser::no },
- { 'e', "extreme", Arg_parser::no },
- { 'f', "force", Arg_parser::no },
- { 'F', "recompress", Arg_parser::no },
- { 'h', "help", Arg_parser::no },
- { 'k', "keep", Arg_parser::no },
- { 'm', "match-length", Arg_parser::yes },
- { 'o', "output", Arg_parser::yes },
- { 'q', "quiet", Arg_parser::no },
- { 's', "dictionary-size", Arg_parser::yes },
- { 'S', "volume-size", Arg_parser::yes },
- { 't', "test", Arg_parser::no },
- { 'v', "verbose", Arg_parser::no },
- { 'V', "version", Arg_parser::no },
- { 0 , 0, Arg_parser::no } };
-
- const Arg_parser parser( argc, argv, options );
- if( parser.error().size() ) // bad option
- { show_error( parser.error().c_str(), 0, true ); return 1; }
-
- int argind = 0;
- for( ; argind < parser.arguments(); ++argind )
- {
- const int code = parser.code( argind );
- if( !code ) break; // no more options
- const char * const arg = parser.argument( argind ).c_str();
- switch( code )
- {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- encoder_options = option_mapping[code-'0']; break;
- case 'b': member_size = getnum( arg, 100000, LLONG_MAX / 2 ); break;
- case 'c': to_stdout = true; break;
- case 'd': program_mode = m_decompress; break;
- case 'e': break; // ignored by now
- case 'f': force = true; break;
- case 'F': recompress = true; break;
- case 'h': show_help(); return 0;
- case 'k': keep_input_files = true; break;
- case 'm': encoder_options.match_len_limit =
- getnum( arg, LZ_min_match_len_limit(),
- LZ_max_match_len_limit() ); break;
- case 'o': default_output_filename = arg; break;
- case 'q': verbosity = -1; break;
- case 's': encoder_options.dictionary_size = get_dict_size( arg );
- break;
- case 'S': volume_size = getnum( arg, 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" );
- }
- } // end process options
-
-#if defined(__OS2__)
- _fsetmode( stdin, "b" );
- _fsetmode( stdout, "b" );
-#endif
-
- bool filenames_given = false;
- for( ; argind < parser.arguments(); ++argind )
- {
- if( parser.argument( argind ) != "-" ) filenames_given = true;
- filenames.push_back( parser.argument( argind ) );
- }
-
- if( filenames.empty() ) filenames.push_back("-");
- if( !to_stdout && program_mode != m_test &&
- ( filenames_given || default_output_filename.size() ) )
- set_signals();
-
- Pretty_print pp( filenames );
- if( program_mode == m_test )
- outfd = -1;
-
- int retval = 0;
- for( unsigned int i = 0; i < filenames.size(); ++i )
- {
- struct stat in_stats;
- output_filename.clear();
-
- if( !filenames[i].size() || filenames[i] == "-" )
- {
- input_filename.clear();
- infd = STDIN_FILENO;
- if( program_mode != m_test )
- {
- if( to_stdout || !default_output_filename.size() )
- outfd = STDOUT_FILENO;
- else
- {
- if( program_mode == m_compress )
- set_c_outname( default_output_filename, volume_size != LLONG_MAX );
- else 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];
- const int eindex = extension_index( input_filename );
- infd = open_instream( input_filename, &in_stats, program_mode,
- eindex, recompress, 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 );
- outfd_mode = S_IRUSR | S_IWUSR;
- 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.size() && !to_stdout && program_mode != m_test )
- delete_output_on_interrupt = true;
- const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0;
- pp.set_name( input_filename );
- int tmp = 0;
- if( program_mode == m_compress )
- tmp = compress( member_size, volume_size, encoder_options, 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.size() )
- {
- close( infd ); infd = -1;
- if( !keep_input_files && !to_stdout && program_mode != m_test )
- std::remove( input_filename.c_str() );
- }
- }
- if( outfd >= 0 && close( outfd ) != 0 )
- {
- show_error( "Can't close stdout", errno );
- if( retval < 1 ) retval = 1;
- }
- return retval;
- }