Adding upstream version 1.6~pre1.upstream/1.6_pre1

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 831 insertions, 0 deletions

diff --git a/main.cc b/main.cc
new file mode 100644
index 0000000..fa91d9d
--- /dev/null
+++ b/main.cc
@@ -0,0 +1,831 @@
+/*  Lzip - A data compressor based on the LZMA algorithm
+    Copyright (C) 2008, 2009 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 lzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <algorithm>
+#include <cerrno>
+#include <climits>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+#include <vector>
+#include <fcntl.h>
+#include <stdint.h>
+#include <signal.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#include "arg_parser.h"
+#include "lzip.h"
+#include "decoder.h"
+#include "encoder.h"
+
+#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
+
+
+namespace {
+
+const char * invocation_name = 0;
+const char * const Program_name    = "Lzip";
+const char * const program_name    = "lzip";
+const char * const program_year    = "2009";
+
+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 };
+
+std::string output_filename;
+int outhandle = -1;
+bool delete_output_on_interrupt = false;
+
+
+void show_help() throw()
+  {
+  std::printf( "%s - A data compressor based on the LZMA algorithm.\n", Program_name );
+  std::printf( "\nUsage: %s [options] [files]\n", invocation_name );
+  std::printf( "Options:\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( "  -k, --keep                 keep (don't delete) input files\n" );
+  std::printf( "  -m, --match-length=<n>     set match length limit in bytes [80]\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, lzip compresses or decompresses\n" );
+  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( "Lzip home page: http://www.nongnu.org/lzip/lzip.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, long long limit = 9999,
+                         const int set_prefix = 0 ) throw()
+  {
+  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 = std::max( 999LL, std::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;
+  }
+
+
+long long getnum( const char * ptr, const int bs,
+                  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 '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 );
+      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 * arg ) throw()
+  {
+  char *tail;
+  int bits = std::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 );
+  }
+
+
+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 * in_statsp,
+                   const Mode program_mode, const int eindex,
+                   const bool force, const bool to_stdout ) throw()
+  {
+  int inhandle = -1;
+  if( program_mode == m_compress && !force && 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
+    {
+    inhandle = open( name.c_str(), O_RDONLY );
+    if( inhandle < 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( inhandle, 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 )
+          std::fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n",
+                        program_name, name.c_str(),
+                        to_stdout ? "" : " and `--stdout' was not specified" );
+        close( inhandle );
+        inhandle = -1;
+        }
+      }
+    }
+  return inhandle;
+  }
+
+
+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 >= 0 )
+    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()
+  {
+  if( force )
+    outhandle = open( output_filename.c_str(), O_CREAT | O_TRUNC | O_WRONLY,
+                      S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+  else outhandle = open( output_filename.c_str(), O_CREAT | O_EXCL | O_WRONLY,
+                         S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+  if( outhandle < 0 )
+    {
+    if( errno == EEXIST ) outhandle = -2; else outhandle = -1;
+    if( verbosity >= 0 )
+      {
+      if( outhandle == -2 )
+        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 ( outhandle >= 0 );
+  }
+
+
+bool check_tty( const int inhandle, const Mode program_mode ) throw()
+  {
+  if( program_mode == m_compress && isatty( outhandle ) )
+    {
+    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( inhandle ) )
+    {
+    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 )
+    {
+    if( verbosity >= 0 )
+      std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
+               program_name, output_filename.c_str() );
+    if( outhandle >= 0 ) { close( outhandle ); outhandle = -1; }
+    if( std::remove( output_filename.c_str() ) != 0 )
+      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 * in_statsp, int * retvalp )
+  {
+  int tmp = 0;
+  if( in_statsp )
+    {
+    if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1;
+    if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
+    // fchown will in many cases return with EPERM, which can be safely ignored.
+    }
+  if( close( outhandle ) == 0 ) outhandle = -1;
+  else cleanup_and_fail( 1 );
+  delete_output_on_interrupt = false;
+  if( !in_statsp ) return;
+  if( !tmp )
+    {
+    struct utimbuf t;
+    t.actime = in_statsp->st_atime;
+    t.modtime = in_statsp->st_mtime;
+    tmp = utime( output_filename.c_str(), &t );
+    }
+  if( tmp )
+    {
+    if( tmp > *retvalp ) *retvalp = tmp;
+    show_error( "I can't change output file attributes." );
+    cleanup_and_fail( *retvalp );
+    }
+  }
+
+
+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 compress( const long long member_size, const long long volume_size,
+              lzma_options encoder_options, const int inhandle,
+              const Pretty_print & pp, const struct stat * in_statsp,
+              int * retvalp )
+  {
+  if( verbosity >= 1 ) pp();
+  File_header header;
+  header.set_magic();
+  if( !header.dictionary_size( encoder_options.dictionary_size ) ||
+      encoder_options.match_len_limit < 5 ||
+      encoder_options.match_len_limit > max_match_len )
+    internal_error( "invalid argument to encoder" );
+
+  try {
+    Matchfinder matchfinder( header.dictionary_size(),
+                             encoder_options.match_len_limit, inhandle );
+    header.dictionary_size( matchfinder.dictionary_size() );
+
+    long long in_size = 0, out_size = 0, partial_volume_size = 0;
+    while( true )
+      {
+      LZ_encoder encoder( matchfinder, header, outhandle );
+      const long long size =
+        std::min( member_size, volume_size - partial_volume_size );
+      if( !encoder.encode_member( size ) )
+        { pp(); show_error( "read error", errno ); return 1; }
+      in_size += matchfinder.data_position();
+      out_size += encoder.member_position();
+      if( matchfinder.finished() ) break;
+      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, retvalp );
+          if( !next_filename() )
+            { pp(); show_error( "too many volume files" ); return 1; }
+          if( !open_outstream( true ) ) return 1;
+          delete_output_on_interrupt = true;
+          }
+        }
+      if( !matchfinder.reset() )
+        { pp(); show_error( "read error", errno ); return 1; }
+      }
+
+    if( verbosity >= 1 )
+      {
+      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 );
+      }
+    }
+  catch( std::bad_alloc )
+    {
+    pp( "not enough memory. Try a smaller dictionary size" );
+    return 1;
+    }
+  catch( Error e ) { pp(); show_error( e.s, errno ); return 1; }
+  return 0;
+  }
+
+
+int decompress( const int inhandle, const Pretty_print & pp,
+                const bool testing )
+  {
+  try {
+    Input_buffer ibuf( inhandle );
+    long long partial_file_pos = 0;
+    for( bool first_pass = true; ; first_pass = false, pp.reset() )
+      {
+      File_header header;
+      for( unsigned int i = 0; i < sizeof header; ++i )
+        ((uint8_t *)&header)[i] = ibuf.read_byte();
+      if( ibuf.finished() )
+        {
+        if( first_pass ) { pp( "error reading member header" ); return 1; }
+        else break;
+        }
+      if( !header.verify_magic() )
+        {
+        if( !first_pass ) break;
+        if( verbosity >= 0 )
+          { pp();
+            std::fprintf( stderr, "bad magic number (file not created by %s).\n",
+                          program_name ); }
+        return 2;
+        }
+      if( !header.verify_version() )
+        {
+        if( verbosity >= 0 )
+          { pp();
+            std::fprintf( stderr, "version %d member format not supported, newer %s needed.\n",
+                          header.version, program_name ); }
+        return 2;
+        }
+      if( header.dictionary_size() < min_dictionary_size ||
+          header.dictionary_size() > max_dictionary_size )
+        { pp( "invalid dictionary size in member header" ); return 2; }
+
+      if( verbosity >= 1 )
+        {
+        pp();
+        if( verbosity >= 2 )
+          std::fprintf( stderr, "version %d, dictionary size %7sB.  ",
+                        header.version,
+                        format_num( header.dictionary_size() ) );
+        }
+      LZ_decoder decoder( header, ibuf, outhandle );
+
+      const int result = decoder.decode_member( pp );
+      partial_file_pos += decoder.member_position();
+      if( result != 0 )
+        {
+        if( verbosity >= 0 && result <= 2 )
+          {
+          pp();
+          if( result == 2 )
+            std::fprintf( stderr, "file ends unexpectedly at pos %lld\n",
+                          partial_file_pos );
+          else
+            std::fprintf( stderr, "decoder error at pos %lld\n",
+                          partial_file_pos );
+          }
+        return 2;
+        }
+      if( verbosity >= 1 )
+        { if( testing ) std::fprintf( stderr, "ok\n" );
+          else std::fprintf( stderr, "done\n" ); }
+      }
+    }
+  catch( std::bad_alloc )
+    {
+    pp( "not enough memory. Find a machine with more memory" );
+    return 1;
+    }
+  catch( Error e ) { pp(); show_error( e.s, errno ); return 1; }
+  return 0;
+  }
+
+
+void signal_handler( const int ) throw()
+  {
+  show_error( "Control-C or similar caught, quitting." );
+  cleanup_and_fail( 0 );
+  }
+
+
+void set_signals() throw()
+  {
+  signal( SIGTERM, signal_handler );
+  signal( SIGHUP, signal_handler );
+  signal( SIGINT, signal_handler );
+  }
+
+} // end namespace
+
+
+int verbosity = 0;
+
+
+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 * msg, const int errcode, const bool help ) throw()
+  {
+  if( verbosity >= 0 )
+    {
+    if( msg && msg[0] != 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] != 0 )
+      std::fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name );
+    }
+  }
+
+
+void internal_error( const char * msg )
+  {
+  std::string s( "internal error: " ); s += msg;
+  show_error( s.c_str() );
+  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, char * 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 char * 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 * argv[] )
+  {
+  // Mapping from gzip/bzip2 style 1..9 compression modes
+  // to the corresponding LZMA compression modes.
+  const lzma_options option_mapping[] =
+    {
+    { 1 << 22,  10 },		// -1
+    { 1 << 22,  12 },		// -2
+    { 1 << 22,  17 },		// -3
+    { 1 << 22,  26 },		// -4
+    { 1 << 22,  44 },		// -5
+    { 1 << 23,  80 },		// -6
+    { 1 << 24, 108 },		// -7
+    { 1 << 24, 163 },		// -8
+    { 1 << 25, 273 } };		// -9
+  lzma_options encoder_options = option_mapping[5];	// default = "-6"
+  long long member_size = LLONG_MAX;
+  long long volume_size = LLONG_MAX;
+  int inhandle = -1;
+  Mode program_mode = m_compress;
+  bool force = false;
+  bool keep_input_files = false;
+  bool to_stdout = false;
+  std::string input_filename;
+  std::string default_output_filename;
+  std::vector< std::string > filenames;
+  invocation_name = argv[0];
+
+  const Arg_parser::Option options[] =
+    {
+    { '1', "fast",            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  },
+    { 'f', "force",           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  } };
+
+  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 * arg = parser.argument( argind ).c_str();
+    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, 5, 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 < parser.arguments(); ++argind )
+    {
+    if( parser.argument( argind ) != "-" ) filenames_given = true;
+    filenames.push_back( parser.argument( argind ) );
+    }
+
+  if( filenames.empty() ) filenames.push_back("-");
+  if( filenames_given ) set_signals();
+
+  Pretty_print pp( filenames );
+  if( program_mode == m_compress )
+    {
+    dis_slots.init();
+    prob_prices.init();
+    }
+  else if( program_mode == m_test )
+    outhandle = -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();
+      inhandle = STDIN_FILENO;
+      if( program_mode != m_test )
+        {
+        if( to_stdout || !default_output_filename.size() )
+          outhandle = STDOUT_FILENO;
+        else
+          {
+          if( program_mode == m_compress )
+            set_c_outname( default_output_filename, volume_size != LLONG_MAX );
+          else output_filename = default_output_filename;
+          if( !open_outstream( force ) )
+            {
+            if( outhandle == -1 && retval < 1 ) retval = 1;
+            close( inhandle ); inhandle = -1;
+            continue;
+            }
+          }
+        }
+      }
+    else
+      {
+      input_filename = filenames[i];
+      const int eindex = extension_index( input_filename );
+      inhandle = open_instream( input_filename, &in_stats, program_mode,
+                                eindex, force, to_stdout );
+      if( inhandle < 0 ) continue;
+      if( program_mode != m_test )
+        {
+        if( to_stdout ) outhandle = 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( outhandle == -1 && retval < 1 ) retval = 1;
+            close( inhandle ); inhandle = -1;
+            continue;
+            }
+          }
+        }
+      }
+
+    if( !check_tty( inhandle, program_mode ) ) return 1;
+
+    if( output_filename.size() && !to_stdout && program_mode != m_test )
+      delete_output_on_interrupt = true;
+    const struct stat * 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, inhandle,
+                      pp, in_statsp, &retval );
+    else
+      tmp = decompress( inhandle, 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, &retval );
+    if( input_filename.size() )
+      {
+      close( inhandle ); inhandle = -1;
+      if( !keep_input_files && !to_stdout && program_mode != m_test )
+        std::remove( input_filename.c_str() );
+      }
+    }
+  if( outhandle >= 0 ) close( outhandle );
+  return retval;
+  }