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-rw-r--r--main.cc174
1 files changed, 88 insertions, 86 deletions
diff --git a/main.cc b/main.cc
index f8fdb93..d96fdb7 100644
--- a/main.cc
+++ b/main.cc
@@ -1,6 +1,6 @@
/* Plzip - A parallel compressor compatible with lzip
Copyright (C) 2009 Laszlo Ersek.
- Copyright (C) 2009, 2010 Antonio Diaz Diaz.
+ 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
@@ -63,7 +63,7 @@ namespace {
const char * const Program_name = "Plzip";
const char * const program_name = "plzip";
-const char * const program_year = "2010";
+const char * const program_year = "2012";
const char * invocation_name = 0;
#ifdef O_BINARY
@@ -97,50 +97,55 @@ void show_help() throw()
{
std::printf( "%s - A parallel compressor compatible with lzip.\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, --data-size=<n> set input data block size 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 [36]\n" );
- std::printf( " -n, --threads=<n> set the number of (de)compression threads\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( " -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( "\nOptions:\n"
+ " -h, --help display this help and exit\n"
+ " -V, --version output version information and exit\n"
+ " -B, --data-size=<bytes> set input data block size 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"
+ " -n, --threads=<n> set the number of (de)compression threads\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"
+ " -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( verbosity > 0 )
{
std::printf( " -D, --debug=<level> (0-1) print debug statistics to stderr\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( "Plzip home page: http://www.nongnu.org/lzip/plzip.html\n" );
+ std::printf( "If no file names are given, plzip 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"
+ "Plzip home page: http://www.nongnu.org/lzip/plzip.html\n" );
}
void show_version() throw()
{
std::printf( "%s %s\n", Program_name, PROGVERSION );
- std::printf( "Copyright (C) 2009 Laszlo Ersek.\n" );
- std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+ std::printf( "Copyright (C) 2009 Laszlo Ersek.\n"
+ "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
std::printf( "Using Lzlib %s\n", LZ_version() );
- 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" );
+ std::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" );
}
-long long getnum( const char * const ptr, const int bs = 0,
+long long getnum( const char * const ptr,
const long long llimit = LLONG_MIN + 1,
const long long ulimit = LLONG_MAX ) throw()
{
@@ -161,9 +166,6 @@ long long getnum( const char * const ptr, const int bs = 0,
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;
@@ -205,7 +207,7 @@ int get_dict_size( const char * const arg ) throw()
if( bits >= LZ_min_dictionary_bits() &&
bits <= LZ_max_dictionary_bits() && *tail == 0 )
return ( 1 << bits );
- return getnum( arg, 0, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
+ return getnum( arg, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
}
@@ -224,13 +226,13 @@ int extension_index( const std::string & name ) throw()
int open_instream( const std::string & name, struct stat * const in_statsp,
const Mode program_mode, const int eindex,
- const bool force, const bool to_stdout ) throw()
+ const bool recompress, const bool to_stdout ) throw()
{
int infd = -1;
- if( program_mode == m_compress && !force && eindex >= 0 )
+ if( program_mode == m_compress && !recompress && eindex >= 0 )
{
if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Input file `%s' already has `%s' suffix.\n",
+ std::fprintf( stderr, "%s: Input file '%s' already has '%s' suffix.\n",
program_name, name.c_str(),
known_extensions[eindex].from );
}
@@ -240,7 +242,7 @@ int open_instream( const std::string & name, struct stat * const in_statsp,
if( infd < 0 )
{
if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
+ std::fprintf( stderr, "%s: Can't open input file '%s': %s.\n",
program_name, name.c_str(), std::strerror( errno ) );
}
else
@@ -253,10 +255,10 @@ int open_instream( const std::string & name, struct stat * const in_statsp,
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",
+ 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" : "" );
+ " and '--stdout' was not specified" : "" );
close( infd );
infd = -1;
}
@@ -286,8 +288,8 @@ void set_d_outname( const std::string & name, const int i ) throw()
}
}
output_filename = name; output_filename += ".out";
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Can't guess original name for `%s' -- using `%s'.\n",
+ 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() );
}
@@ -301,10 +303,10 @@ bool open_outstream( const bool force ) throw()
if( outfd < 0 && verbosity >= 0 )
{
if( errno == EEXIST )
- std::fprintf( stderr, "%s: Output file `%s' already exists, skipping.\n",
+ 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",
+ std::fprintf( stderr, "%s: Can't create output file '%s': %s.\n",
program_name, output_filename.c_str(), std::strerror( errno ) );
}
return ( outfd >= 0 );
@@ -334,10 +336,10 @@ void cleanup_and_fail( const int retval ) throw()
{
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() );
+ 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 )
+ if( std::remove( output_filename.c_str() ) != 0 && errno != ENOENT )
show_error( "WARNING: deletion of output file (apparently) failed." );
}
std::exit( retval );
@@ -347,30 +349,26 @@ void cleanup_and_fail( const int retval ) throw()
// Set permissions, owner and times.
void close_and_set_permissions( const struct stat * const in_statsp )
{
- bool error = false;
+ bool warning = false;
if( in_statsp )
{
- if( fchmod( outfd, in_statsp->st_mode ) != 0 ||
- ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
- errno != EPERM ) ) error = true;
// 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 ) outfd = -1;
- else cleanup_and_fail( 1 );
+ if( close( outfd ) != 0 ) cleanup_and_fail( 1 );
+ outfd = -1;
delete_output_on_interrupt = false;
- if( !in_statsp ) return;
- if( !error )
+ 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 ) error = true;
+ if( utime( output_filename.c_str(), &t ) != 0 ) warning = true;
}
- if( error )
- {
+ if( warning && verbosity >= 1 )
show_error( "Can't change output file attributes." );
- cleanup_and_fail( 1 );
- }
}
@@ -397,8 +395,9 @@ void set_signals() throw()
int verbosity = 0;
-// This can be called from any thread, main thread or sub-threads alike, since
-// they all call common helper functions that call fatal() in case of an error.
+// This can be called from any thread, main thread or sub-threads alike,
+// since they all call common helper functions that call fatal() in case
+// of an error.
//
void fatal() { signal_handler( SIGUSR1 ); }
@@ -432,13 +431,13 @@ void show_error( const char * const msg, const int errcode, const bool help ) th
std::fprintf( stderr, "\n" );
}
if( help && invocation_name && invocation_name[0] )
- std::fprintf( stderr, "Try `%s --help' for more information.\n",
+ std::fprintf( stderr, "Try '%s --help' for more information.\n",
invocation_name );
}
}
-void internal_error( const char * const msg )
+void internal_error( const char * const msg ) throw()
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: internal error: %s.\n", program_name, msg );
@@ -477,7 +476,7 @@ int writeblock( const int fd, const uint8_t * const buf, const int size ) throw(
errno = 0;
const int n = write( fd, buf + size - rest, rest );
if( n > 0 ) rest -= n;
- else if( errno && errno != EINTR && errno != EAGAIN ) break;
+ else if( n < 0 && errno != EINTR && errno != EAGAIN ) break;
}
return ( rest > 0 ) ? size - rest : size;
}
@@ -507,6 +506,7 @@ int main( const int argc, const char * const argv[] )
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;
@@ -518,11 +518,8 @@ int main( const int argc, const char * const argv[] )
if( LZ_version()[0] != LZ_version_string[0] )
internal_error( "bad library version" );
- const int slots_per_worker = 2;
long max_workers = sysconf( _SC_THREAD_THREADS_MAX );
- if( max_workers < 1 || max_workers > INT_MAX / slots_per_worker )
- max_workers = INT_MAX / slots_per_worker;
- if( max_workers > INT_MAX / (int)sizeof (pthread_t) )
+ if( max_workers < 1 || max_workers > INT_MAX / (int)sizeof (pthread_t) )
max_workers = INT_MAX / sizeof (pthread_t);
const Arg_parser::Option options[] =
@@ -541,9 +538,9 @@ int main( const int argc, const char * const argv[] )
{ 'B', "data-size", Arg_parser::yes },
{ 'c', "stdout", Arg_parser::no },
{ 'd', "decompress", Arg_parser::no },
- { 'e', "extreme", Arg_parser::no },
{ 'D', "debug", Arg_parser::yes },
{ '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 },
@@ -573,20 +570,20 @@ int main( const int argc, const char * const argv[] )
case '5': case '6': case '7': case '8': case '9':
encoder_options = option_mapping[code-'0']; break;
case 'b': break;
- case 'B': data_size = getnum( arg, 0, 2 * LZ_min_dictionary_size(),
+ case 'B': data_size = getnum( arg, 2 * LZ_min_dictionary_size(),
2 * LZ_max_dictionary_size() ); break;
case 'c': to_stdout = true; break;
case 'd': program_mode = m_decompress; break;
- case 'D': debug_level = getnum( arg, 0, 0, 3 ); break;
- case 'e': break; // ignored by now
+ case 'D': debug_level = getnum( arg, 0, 3 ); 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, 0, LZ_min_match_len_limit(),
- LZ_max_match_len_limit() ); break;
+ getnum( arg, LZ_min_match_len_limit(),
+ LZ_max_match_len_limit() ); break;
case 'o': default_output_filename = arg; break;
- case 'n': num_workers = getnum( arg, 0, 1, max_workers ); break;
+ case 'n': num_workers = getnum( arg, 1, max_workers ); break;
case 'q': verbosity = -1; break;
case 's': encoder_options.dictionary_size = get_dict_size( arg );
break;
@@ -598,6 +595,14 @@ int main( const int argc, const char * const argv[] )
}
} // end process options
+#if defined(__OS2__)
+ _fsetmode( stdin, "b" );
+ _fsetmode( stdout, "b" );
+#endif
+
+ if( program_mode == m_test )
+ outfd = -1;
+
if( data_size <= 0 )
data_size = 2 * std::max( 65536, encoder_options.dictionary_size );
else if( data_size < encoder_options.dictionary_size )
@@ -609,7 +614,6 @@ int main( const int argc, const char * const argv[] )
if( num_online <= 0 ) num_online = 1;
num_workers = std::min( num_online, max_workers );
}
- const int num_slots = num_workers * slots_per_worker;
bool filenames_given = false;
for( ; argind < parser.arguments(); ++argind )
@@ -625,8 +629,6 @@ int main( const int argc, const char * const argv[] )
std::signal( SIGUSR1, signal_handler );
Pretty_print pp( filenames );
- if( program_mode == m_test )
- outfd = -1;
int retval = 0;
for( unsigned int i = 0; i < filenames.size(); ++i )
@@ -662,7 +664,7 @@ int main( const int argc, const char * const argv[] )
input_filename = filenames[i];
const int eindex = extension_index( input_filename );
infd = open_instream( input_filename, &in_stats, program_mode,
- eindex, force, to_stdout );
+ eindex, recompress, to_stdout );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
if( program_mode != m_test )
{
@@ -693,11 +695,11 @@ int main( const int argc, const char * const argv[] )
int tmp = 0;
if( program_mode == m_compress )
tmp = compress( data_size, encoder_options.dictionary_size,
- encoder_options.match_len_limit, num_workers,
- num_slots, infd, outfd, pp, debug_level );
+ encoder_options.match_len_limit,
+ num_workers, infd, outfd, pp, debug_level );
else
- tmp = decompress( num_workers, num_slots, infd, outfd, pp,
- debug_level, program_mode == m_test );
+ tmp = decompress( num_workers, infd, outfd, pp, debug_level,
+ program_mode == m_test );
if( tmp > retval ) retval = tmp;
if( tmp && program_mode != m_test ) cleanup_and_fail( retval );