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lzip/main.cc
Daniel Baumann 9968013fce
Merging upstream version 1.20. 
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-20 23:04:29 +01:00

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/* Lzip - LZMA lossless data compressor
Copyright (C) 2008-2018 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 2 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/>.
*/
/*
Exit status: 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 lzip to panic.
*/
#define _FILE_OFFSET_BITS 64
#include <algorithm>
#include <cctype>
#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>
#if defined(__MSVCRT__)
#include <io.h>
#define fchmod(x,y) 0
#define fchown(x,y,z) 0
#define strtoull std::strtoul
#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 "arg_parser.h"
#include "lzip.h"
#include "decoder.h"
#include "encoder_base.h"
#include "encoder.h"
#include "fast_encoder.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
#if CHAR_BIT != 8
#error "Environments where CHAR_BIT != 8 are not supported."
#endif
int verbosity = 0;
namespace {
const char * const Program_name = "Lzip";
const char * const program_name = "lzip";
const char * const program_year = "2018";
const char * invocation_name = 0;
const struct { const char * from; const char * to; } known_extensions[] = {
{ ".lz", "" },
{ ".tlz", ".tar" },
{ 0, 0 } };
struct Lzma_options
{
int dictionary_size; // 4 KiB .. 512 MiB
int match_len_limit; // 5 .. 273
};
enum Mode { m_compress, m_decompress, m_list, m_test };
std::string output_filename;
int outfd = -1;
bool delete_output_on_interrupt = false;
void show_help()
{
std::printf( "%s - LZMA lossless data compressor.\n", Program_name );
std::printf( "\nUsage: %s [options] [files]\n", invocation_name );
std::printf( "\nOptions:\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
" -a, --trailing-error exit with error status if trailing data\n"
" -b, --member-size=<bytes> set member size limit in bytes\n"
" -c, --stdout write to standard output, keep input files\n"
" -d, --decompress decompress\n"
" -f, --force overwrite existing output files\n"
" -F, --recompress force re-compression of compressed files\n"
" -k, --keep keep (don't delete) input files\n"
" -l, --list print (un)compressed file sizes\n"
" -m, --match-length=<bytes> set match length limit in bytes [36]\n"
" -o, --output=<file> if reading standard input, write to <file>\n"
" -q, --quiet suppress all messages\n"
" -s, --dictionary-size=<bytes> set dictionary size limit in bytes [8 MiB]\n"
" -S, --volume-size=<bytes> set volume size limit in bytes, implies -k\n"
" -t, --test test compressed file integrity\n"
" -v, --verbose be verbose (a 2nd -v gives more)\n"
" -0 .. -9 set compression level [default 6]\n"
" --fast alias for -0\n"
" --best alias for -9\n"
" --loose-trailing allow trailing data seeming corrupt header\n"
"If no file names are given, or if a file is '-', lzip compresses or\n"
"decompresses 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"
"Dictionary sizes 12 to 29 are interpreted as powers of two, meaning 2^12\n"
"to 2^29 bytes.\n"
"\nThe 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 --dictionary-size and --match-length\n"
"options directly to achieve optimal performance.\n"
"\nExit status: 0 for a normal exit, 1 for environmental problems (file\n"
"not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or\n"
"invalid input file, 3 for an internal consistency error (eg, bug) which\n"
"caused lzip to panic.\n"
"\nReport bugs to lzip-bug@nongnu.org\n"
"Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" );
}
void show_version()
{
std::printf( "%s %s\n", program_name, PROGVERSION );
std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
std::printf( "License GPLv2+: GNU GPL version 2 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" );
}
} // end namespace
void Pretty_print::operator()( const char * const msg ) const
{
if( verbosity >= 0 )
{
if( first_post )
{
first_post = false;
std::fputs( padded_name.c_str(), stderr );
if( !msg ) std::fflush( stderr );
}
if( msg ) std::fprintf( stderr, "%s\n", msg );
}
}
const char * bad_version( const unsigned version )
{
static char buf[80];
snprintf( buf, sizeof buf, "Version %u member format not supported.",
version );
return buf;
}
const char * format_ds( const unsigned dictionary_size )
{
enum { bufsize = 16, factor = 1024 };
static char buf[bufsize];
const char * const prefix[8] =
{ "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
const char * p = "";
const char * np = " ";
unsigned num = dictionary_size;
bool exact = ( num % factor == 0 );
for( int i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
{ num /= factor; if( num % factor != 0 ) exact = false;
p = prefix[i]; np = ""; }
snprintf( buf, bufsize, "%s%4u %sB", np, num, p );
return buf;
}
void show_header( const unsigned dictionary_size )
{
std::fprintf( stderr, "dictionary %s, ", format_ds( dictionary_size ) );
}
namespace {
unsigned long long getnum( const char * const ptr,
const unsigned long long llimit,
const unsigned long long ulimit )
{
char * tail;
errno = 0;
unsigned long long result = strtoull( ptr, &tail, 0 );
if( tail == ptr )
{
show_error( "Bad or missing numerical argument.", 0, true );
std::exit( 1 );
}
if( !errno && tail[0] )
{
const unsigned factor = ( tail[1] == 'i' ) ? 1024 : 1000;
int exponent = 0; // 0 = bad multiplier
switch( tail[0] )
{
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; break;
case 'k': if( factor == 1000 ) exponent = 1; break;
}
if( exponent <= 0 )
{
show_error( "Bad multiplier in numerical argument.", 0, true );
std::exit( 1 );
}
for( int i = 0; i < exponent; ++i )
{
if( ulimit / factor >= 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 )
{
char * tail;
const long bits = std::strtol( arg, &tail, 0 );
if( bits >= min_dictionary_bits &&
bits <= max_dictionary_bits && *tail == 0 )
return ( 1 << bits );
return getnum( arg, min_dictionary_size, max_dictionary_size );
}
void set_mode( Mode & program_mode, const Mode new_mode )
{
if( program_mode != m_compress && program_mode != new_mode )
{
show_error( "Only one operation can be specified.", 0, true );
std::exit( 1 );
}
program_mode = new_mode;
}
int extension_index( const std::string & name )
{
for( int eindex = 0; known_extensions[eindex].from; ++eindex )
{
const std::string ext( known_extensions[eindex].from );
if( name.size() > ext.size() &&
name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
return eindex;
}
return -1;
}
void set_c_outname( const std::string & name, const bool force_ext,
const bool multifile )
{
output_filename = name;
if( multifile ) output_filename += "00001";
if( force_ext || multifile || extension_index( output_filename ) < 0 )
output_filename += known_extensions[0].from;
}
void set_d_outname( const std::string & name, const int eindex )
{
if( eindex >= 0 )
{
const std::string from( known_extensions[eindex].from );
if( name.size() > from.size() )
{
output_filename.assign( name, 0, name.size() - from.size() );
output_filename += known_extensions[eindex].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() );
}
} // end namespace
int open_instream( const char * const name, struct stat * const in_statsp,
const bool no_ofile, const bool reg_only )
{
int infd = open( name, O_RDONLY | O_BINARY );
if( infd < 0 )
show_file_error( name, "Can't open input file", errno );
else
{
const int i = fstat( infd, in_statsp );
const mode_t mode = in_statsp->st_mode;
const bool can_read = ( i == 0 && !reg_only &&
( S_ISBLK( mode ) || S_ISCHR( mode ) ||
S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || !no_ofile ) ) )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Input file '%s' is not a regular file%s.\n",
program_name, name,
( can_read && !no_ofile ) ?
",\n and '--stdout' was not specified" : "" );
close( infd );
infd = -1;
}
}
return infd;
}
namespace {
int open_instream2( const char * const name, struct stat * const in_statsp,
const Mode program_mode, const int eindex,
const bool recompress, const bool to_stdout )
{
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, known_extensions[eindex].from );
return -1;
}
const bool no_ofile = ( to_stdout || program_mode == m_test );
return open_instream( name, in_statsp, no_ofile, false );
}
bool open_outstream( const bool force, const bool from_stdin )
{
const mode_t usr_rw = S_IRUSR | S_IWUSR;
const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
const mode_t outfd_mode = from_stdin ? all_rw : usr_rw;
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 ) delete_output_on_interrupt = true;
else if( 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 char * const input_filename, const int infd,
const 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_file_error( input_filename,
"I won't read compressed data from a terminal." );
return false;
}
return true;
}
void cleanup_and_fail( const int retval )
{
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 warning = false;
if( in_statsp )
{
const mode_t mode = in_statsp->st_mode;
// 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 )
{ if( fchmod( outfd, mode ) != 0 ) warning = true; }
else
if( errno != EPERM ||
fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 )
warning = true;
}
if( close( outfd ) != 0 )
{
show_error( "Error closing output file", errno );
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.c_str(), &t ) != 0 ) warning = true;
}
if( warning && verbosity >= 1 )
show_error( "Can't change output file attributes." );
}
bool next_filename()
{
const unsigned name_len = output_filename.size();
const unsigned ext_len = std::strlen( known_extensions[0].from );
if( name_len >= ext_len + 5 ) // "*00001.lz"
for( int i = name_len - ext_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 compress( const unsigned long long cfile_size,
const unsigned long long member_size,
const unsigned long long volume_size, const int infd,
const Lzma_options & encoder_options, const Pretty_print & pp,
const struct stat * const in_statsp, const bool zero )
{
int retval = 0;
LZ_encoder_base * encoder = 0; // polymorphic encoder
if( verbosity >= 1 ) pp();
try {
if( zero )
encoder = new FLZ_encoder( infd, outfd );
else
{
File_header header;
if( header.dictionary_size( encoder_options.dictionary_size ) &&
encoder_options.match_len_limit >= min_match_len_limit &&
encoder_options.match_len_limit <= max_match_len )
encoder = new LZ_encoder( header.dictionary_size(),
encoder_options.match_len_limit, infd, outfd );
else internal_error( "invalid argument to encoder." );
}
unsigned long long in_size = 0, out_size = 0, partial_volume_size = 0;
while( true ) // encode one member per iteration
{
const unsigned long long size = ( volume_size > 0 ) ?
std::min( member_size, volume_size - partial_volume_size ) : member_size;
show_cprogress( cfile_size, in_size, encoder, &pp ); // init
if( !encoder->encode_member( size ) )
{ pp( "Encoder error." ); retval = 1; break; }
in_size += encoder->data_position();
out_size += encoder->member_position();
if( encoder->data_finished() ) break;
if( volume_size > 0 )
{
partial_volume_size += encoder->member_position();
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( "Too many volume files." ); retval = 1; break; }
if( !open_outstream( true, !in_statsp ) ) { retval = 1; break; }
}
}
}
encoder->reset();
}
if( retval == 0 && verbosity >= 1 )
{
if( in_size == 0 || out_size == 0 )
std::fputs( " no data compressed.\n", stderr );
else
std::fprintf( stderr, "%6.3f:1, %5.2f%% ratio, %5.2f%% saved, "
"%llu in, %llu out.\n",
(double)in_size / out_size,
( 100.0 * out_size ) / in_size,
100.0 - ( ( 100.0 * out_size ) / in_size ),
in_size, out_size );
}
}
catch( std::bad_alloc )
{
pp( "Not enough memory. Try a smaller dictionary size." );
retval = 1;
}
catch( Error e ) { pp(); show_error( e.msg, errno ); retval = 1; }
delete encoder;
return retval;
}
unsigned char xdigit( const unsigned value )
{
if( value <= 9 ) return '0' + value;
if( value <= 15 ) return 'A' + value - 10;
return 0;
}
bool show_trailing_data( const uint8_t * const data, const int size,
const Pretty_print & pp, const bool all,
const int ignore_trailing ) // -1 = show
{
if( verbosity >= 4 || ignore_trailing <= 0 )
{
std::string msg;
if( !all ) msg = "first bytes of ";
msg += "trailing data = ";
for( int i = 0; i < size; ++i )
{
msg += xdigit( data[i] >> 4 );
msg += xdigit( data[i] & 0x0F );
msg += ' ';
}
msg += '\'';
for( int i = 0; i < size; ++i )
{ if( std::isprint( data[i] ) ) msg += data[i]; else msg += '.'; }
msg += '\'';
pp( msg.c_str() );
if( ignore_trailing == 0 ) show_file_error( pp.name(), trailing_msg );
}
return ( ignore_trailing > 0 );
}
int decompress( const unsigned long long cfile_size, const int infd,
const Pretty_print & pp, const bool ignore_trailing,
const bool loose_trailing, const bool testing )
{
int retval = 0;
try {
unsigned long long partial_file_pos = 0;
Range_decoder rdec( infd );
for( bool first_member = true; ; first_member = false )
{
File_header header;
rdec.reset_member_position();
const int size = rdec.read_data( header.data, File_header::size );
if( rdec.finished() ) // End Of File
{
if( first_member )
{ show_file_error( pp.name(), "File ends unexpectedly at member header." );
retval = 2; }
else if( header.verify_prefix( size ) )
{ pp( "Truncated header in multimember file." );
show_trailing_data( header.data, size, pp, true, -1 );
retval = 2; }
else if( size > 0 && !show_trailing_data( header.data, size, pp,
true, ignore_trailing ) )
retval = 2;
break;
}
if( !header.verify_magic() )
{
if( first_member )
{ show_file_error( pp.name(), bad_magic_msg ); retval = 2; }
else if( !loose_trailing && header.verify_corrupt() )
{ pp( corrupt_mm_msg );
show_trailing_data( header.data, size, pp, false, -1 );
retval = 2; }
else if( !show_trailing_data( header.data, size, pp, false, ignore_trailing ) )
retval = 2;
break;
}
if( !header.verify_version() )
{ pp( bad_version( header.version() ) ); retval = 2; break; }
const unsigned dictionary_size = header.dictionary_size();
if( !isvalid_ds( dictionary_size ) )
{ pp( bad_dict_msg ); retval = 2; break; }
if( verbosity >= 2 || ( verbosity == 1 && first_member ) ) pp();
LZ_decoder decoder( rdec, dictionary_size, outfd );
show_dprogress( cfile_size, partial_file_pos, &rdec, &pp ); // init
const int result = decoder.decode_member( pp );
partial_file_pos += rdec.member_position();
if( result != 0 )
{
if( verbosity >= 0 && result <= 2 )
{
pp();
std::fprintf( stderr, "%s at pos %llu\n", ( result == 2 ) ?
"File ends unexpectedly" : "Decoder error",
partial_file_pos );
}
retval = 2; break;
}
if( verbosity >= 2 )
{ std::fputs( testing ? "ok\n" : "done\n", stderr ); pp.reset(); }
}
}
catch( std::bad_alloc ) { pp( "Not enough memory." ); retval = 1; }
catch( Error e ) { pp(); show_error( e.msg, errno ); retval = 1; }
if( verbosity == 1 && retval == 0 )
std::fputs( testing ? "ok\n" : "done\n", stderr );
return retval;
}
extern "C" void signal_handler( int )
{
show_error( "Control-C or similar caught, quitting." );
cleanup_and_fail( 1 );
}
void set_signals()
{
std::signal( SIGHUP, signal_handler );
std::signal( SIGINT, signal_handler );
std::signal( SIGTERM, signal_handler );
}
} // end namespace
void show_error( const char * const msg, const int errcode, const bool help )
{
if( verbosity < 0 ) return;
if( msg && msg[0] )
{
std::fprintf( stderr, "%s: %s", program_name, msg );
if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
std::fputc( '\n', stderr );
}
if( help )
std::fprintf( stderr, "Try '%s --help' for more information.\n",
invocation_name );
}
void show_file_error( const char * const filename, const char * const msg,
const int errcode )
{
if( verbosity < 0 ) return;
std::fprintf( stderr, "%s: %s: %s", program_name, filename, msg );
if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
std::fputc( '\n', stderr );
}
void internal_error( const char * const msg )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: internal error: %s\n", program_name, msg );
std::exit( 3 );
}
void show_cprogress( const unsigned long long cfile_size,
const unsigned long long partial_size,
const Matchfinder_base * const m,
const Pretty_print * const p )
{
static unsigned long long csize = 0; // file_size / 100
static unsigned long long psize = 0;
static const Matchfinder_base * mb = 0;
static const Pretty_print * pp = 0;
static bool enabled = true;
if( !enabled ) return;
if( p ) // initialize static vars
{
if( verbosity < 2 || !isatty( STDERR_FILENO ) ) { enabled = false; return; }
csize = cfile_size; psize = partial_size; mb = m; pp = p;
}
if( mb && pp )
{
const unsigned long long pos = psize + mb->data_position();
if( csize > 0 )
std::fprintf( stderr, "%4llu%% %.1f MB\r", pos / csize, pos / 1000000.0 );
else
std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 );
pp->reset(); (*pp)(); // restore cursor position
}
}
void show_dprogress( const unsigned long long cfile_size,
const unsigned long long partial_size,
const Range_decoder * const d,
const Pretty_print * const p )
{
static unsigned long long csize = 0; // file_size / 100
static unsigned long long psize = 0;
static const Range_decoder * rdec = 0;
static const Pretty_print * pp = 0;
static int counter = 0;
static bool enabled = true;
if( !enabled ) return;
if( p ) // initialize static vars
{
if( verbosity < 2 || !isatty( STDERR_FILENO ) ) { enabled = false; return; }
csize = cfile_size; psize = partial_size; rdec = d; pp = p; counter = 0;
}
if( rdec && pp && --counter <= 0 )
{
const unsigned long long pos = psize + rdec->member_position();
counter = 7; // update display every 114688 bytes
if( csize > 0 )
std::fprintf( stderr, "%4llu%% %.1f MB\r", pos / csize, pos / 1000000.0 );
else
std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 );
pp->reset(); (*pp)(); // restore cursor position
}
}
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 << 16, 16 }, // -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"
const unsigned long long max_member_size = 0x0008000000000000ULL;
const unsigned long long max_volume_size = 0x4000000000000000ULL;
unsigned long long member_size = max_member_size;
unsigned long long volume_size = 0;
std::string default_output_filename;
std::vector< std::string > filenames;
Mode program_mode = m_compress;
bool force = false;
bool ignore_trailing = true;
bool keep_input_files = false;
bool loose_trailing = false;
bool recompress = false;
bool to_stdout = false;
bool zero = false;
invocation_name = argv[0];
enum { opt_lt = 256 };
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 },
{ 'a', "trailing-error", Arg_parser::no },
{ 'b', "member-size", Arg_parser::yes },
{ 'c', "stdout", Arg_parser::no },
{ 'd', "decompress", Arg_parser::no },
{ 'f', "force", Arg_parser::no },
{ 'F', "recompress", Arg_parser::no },
{ 'h', "help", Arg_parser::no },
{ 'k', "keep", Arg_parser::no },
{ 'l', "list", Arg_parser::no },
{ 'm', "match-length", Arg_parser::yes },
{ 'n', "threads", 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 },
{ opt_lt, "loose-trailing", 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 std::string & sarg = parser.argument( argind );
const char * const arg = sarg.c_str();
switch( code )
{
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
zero = ( code == '0' );
encoder_options = option_mapping[code-'0']; break;
case 'a': ignore_trailing = false; break;
case 'b': member_size = getnum( arg, 100000, max_member_size ); break;
case 'c': to_stdout = true; break;
case 'd': set_mode( 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 'l': set_mode( program_mode, m_list ); break;
case 'm': encoder_options.match_len_limit =
getnum( arg, min_match_len_limit, max_match_len );
zero = false; break;
case 'n': break;
case 'o': default_output_filename = sarg; break;
case 'q': verbosity = -1; break;
case 's': encoder_options.dictionary_size = get_dict_size( arg );
zero = false; break;
case 'S': volume_size = getnum( arg, 100000, max_volume_size ); break;
case 't': set_mode( program_mode, m_test ); break;
case 'v': if( verbosity < 4 ) ++verbosity; break;
case 'V': show_version(); return 0;
case opt_lt: loose_trailing = true; break;
default : internal_error( "uncaught option." );
}
} // end process options
#if defined(__MSVCRT__) || defined(__OS2__)
setmode( STDIN_FILENO, O_BINARY );
setmode( STDOUT_FILENO, O_BINARY );
#endif
bool filenames_given = false;
for( ; argind < parser.arguments(); ++argind )
{
filenames.push_back( parser.argument( argind ) );
if( filenames.back() != "-" ) filenames_given = true;
}
if( filenames.empty() ) filenames.push_back("-");
if( program_mode == m_list )
return list_files( filenames, ignore_trailing, loose_trailing );
if( program_mode == m_test )
outfd = -1;
else if( program_mode == m_compress )
{
dis_slots.init();
prob_prices.init();
}
if( !to_stdout && program_mode != m_test &&
( filenames_given || default_output_filename.size() ) )
set_signals();
Pretty_print pp( filenames );
int failed_tests = 0;
int retval = 0;
bool stdin_used = false;
for( unsigned i = 0; i < filenames.size(); ++i )
{
std::string input_filename;
int infd;
struct stat in_stats;
output_filename.clear();
if( filenames[i].empty() || filenames[i] == "-" )
{
if( stdin_used ) continue; else stdin_used = true;
infd = STDIN_FILENO;
if( program_mode != m_test )
{
if( to_stdout || default_output_filename.empty() )
outfd = STDOUT_FILENO;
else
{
if( program_mode == m_compress )
set_c_outname( default_output_filename, false, volume_size > 0 );
else output_filename = default_output_filename;
if( !open_outstream( force, true ) )
{
if( retval < 1 ) retval = 1;
close( infd );
continue;
}
}
}
}
else
{
const int eindex = extension_index( input_filename = filenames[i] );
infd = open_instream2( input_filename.c_str(), &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, true, volume_size > 0 );
else set_d_outname( input_filename, eindex );
if( !open_outstream( force, false ) )
{
if( retval < 1 ) retval = 1;
close( infd );
continue;
}
}
}
}
pp.set_name( input_filename );
if( !check_tty( pp.name(), infd, program_mode ) )
{
if( retval < 1 ) retval = 1;
if( program_mode == m_test ) { close( infd ); continue; }
cleanup_and_fail( retval );
}
const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0;
const unsigned long long cfile_size =
( in_statsp && S_ISREG( in_statsp->st_mode ) ) ?
( in_statsp->st_size + 99 ) / 100 : 0;
int tmp;
if( program_mode == m_compress )
tmp = compress( cfile_size, member_size, volume_size, infd,
encoder_options, pp, in_statsp, zero );
else
tmp = decompress( cfile_size, infd, pp, ignore_trailing,
loose_trailing, program_mode == m_test );
if( tmp > retval ) retval = tmp;
if( tmp )
{ if( program_mode != m_test ) cleanup_and_fail( retval );
else ++failed_tests; }
if( delete_output_on_interrupt )
close_and_set_permissions( in_statsp );
if( input_filename.size() )
{
close( infd );
if( !keep_input_files && !to_stdout && program_mode != m_test &&
( program_mode != m_compress || volume_size == 0 ) )
std::remove( input_filename.c_str() );
}
}
if( outfd >= 0 && close( outfd ) != 0 )
{
show_error( "Error closing stdout", errno );
if( retval < 1 ) retval = 1;
}
if( failed_tests > 0 && verbosity >= 1 && filenames.size() > 1 )
std::fprintf( stderr, "%s: warning: %d %s failed the test.\n",
program_name, failed_tests,
( failed_tests == 1 ) ? "file" : "files" );
return retval;
}
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