Merging upstream version 1.3.

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

1 files changed, 1036 insertions, 0 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;
+  }