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-rw-r--r--main.cc266
1 files changed, 150 insertions, 116 deletions
diff --git a/main.cc b/main.cc
index 8b2eedd..d42dbcd 100644
--- a/main.cc
+++ b/main.cc
@@ -1,5 +1,5 @@
/* Lzip - LZMA lossless data compressor
- Copyright (C) 2008-2016 Antonio Diaz Diaz.
+ Copyright (C) 2008-2017 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
@@ -75,10 +75,10 @@ namespace {
const char * const Program_name = "Lzip";
const char * const program_name = "lzip";
-const char * const program_year = "2016";
+const char * const program_year = "2017";
const char * invocation_name = 0;
-struct { const char * from; const char * to; } const known_extensions[] = {
+const struct { const char * from; const char * to; } known_extensions[] = {
{ ".lz", "" },
{ ".tlz", ".tar" },
{ 0, 0 } };
@@ -89,7 +89,7 @@ struct Lzma_options
int match_len_limit; // 5 .. 273
};
-enum Mode { m_compress, m_decompress, m_test };
+enum Mode { m_compress, m_decompress, m_list, m_test };
std::string output_filename;
int outfd = -1;
@@ -110,6 +110,7 @@ void show_help()
" -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"
@@ -148,24 +149,41 @@ void show_version()
"There is NO WARRANTY, to the extent permitted by law.\n" );
}
+} // end namespace
+
+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;
+ }
+
+namespace {
void show_header( const unsigned dictionary_size )
{
if( verbosity >= 3 )
- {
- const char * const prefix[8] =
- { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
- enum { factor = 1024 };
- 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 = ""; }
- std::fprintf( stderr, "dictionary size %s%4u %sB. ", np, num, p );
- }
+ std::fprintf( stderr, "dictionary %s. ", format_ds( dictionary_size ) );
}
@@ -184,7 +202,7 @@ unsigned long long getnum( const char * const ptr,
if( !errno && tail[0] )
{
- const int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+ const unsigned factor = ( tail[1] == 'i' ) ? 1024 : 1000;
int exponent = 0; // 0 = bad multiplier
switch( tail[0] )
{
@@ -222,7 +240,7 @@ unsigned long long getnum( const char * const ptr,
int get_dict_size( const char * const arg )
{
char * tail;
- const int bits = std::strtol( arg, &tail, 0 );
+ const long bits = std::strtol( arg, &tail, 0 );
if( bits >= min_dictionary_bits &&
bits <= max_dictionary_bits && *tail == 0 )
return ( 1 << bits );
@@ -230,62 +248,75 @@ int get_dict_size( const char * const arg )
}
+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 i = 0; known_extensions[i].from; ++i )
+ for( int eindex = 0; known_extensions[eindex].from; ++eindex )
{
- const std::string ext( known_extensions[i].from );
+ const std::string ext( known_extensions[eindex].from );
if( name.size() > ext.size() &&
name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
- return i;
+ return eindex;
}
return -1;
}
+} // end namespace
int open_instream( const char * const name, struct stat * const in_statsp,
- const Mode program_mode, const int eindex,
- const bool recompress, const bool to_stdout )
+ const bool no_ofile, const bool reg_only )
{
- int infd = -1;
- if( program_mode == m_compress && !recompress && eindex >= 0 )
- {
- if( verbosity >= 0 )
- std::fprintf( stderr, "%s: Input file '%s' already has '%s' suffix.\n",
- program_name, name, known_extensions[eindex].from );
- }
+ int infd = open( name, O_RDONLY | O_BINARY );
+ if( infd < 0 )
+ show_file_error( name, "Can't open input file", errno );
else
{
- infd = open( name, O_RDONLY | O_BINARY );
- if( infd < 0 )
+ 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: Can't open input file '%s': %s\n",
- program_name, name, std::strerror( errno ) );
- }
- else
- {
- const int i = fstat( infd, in_statsp );
- const mode_t mode = in_statsp->st_mode;
- const bool can_read = ( i == 0 &&
- ( S_ISBLK( mode ) || S_ISCHR( mode ) ||
- S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
- const bool no_ofile = ( to_stdout || program_mode == m_test );
- 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;
- }
+ 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 );
+ }
+
void set_c_outname( const std::string & name, const bool multifile )
{
@@ -295,15 +326,15 @@ void set_c_outname( const std::string & name, const bool multifile )
}
-void set_d_outname( const std::string & name, const int i )
+void set_d_outname( const std::string & name, const int eindex )
{
- if( i >= 0 )
+ if( eindex >= 0 )
{
- const std::string from( known_extensions[i].from );
+ 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[i].to;
+ output_filename += known_extensions[eindex].to;
return;
}
}
@@ -337,7 +368,8 @@ bool open_outstream( const bool force, const bool from_stdin )
}
-bool check_tty( const int infd, const Mode program_mode )
+bool check_tty( const char * const input_filename, const int infd,
+ const Mode program_mode )
{
if( program_mode == m_compress && isatty( outfd ) )
{
@@ -347,7 +379,8 @@ bool check_tty( const int infd, const Mode program_mode )
if( ( program_mode == m_decompress || program_mode == m_test ) &&
isatty( infd ) )
{
- show_error( "I won't read compressed data from a terminal.", 0, true );
+ show_file_error( input_filename,
+ "I won't read compressed data from a terminal." );
return false;
}
return true;
@@ -406,9 +439,10 @@ void close_and_set_permissions( const struct stat * const in_statsp )
bool next_filename()
{
+ const unsigned name_len = output_filename.size();
const unsigned ext_len = std::strlen( known_extensions[0].from );
- if( output_filename.size() >= ext_len + 5 ) // "*00001.lz"
- for( int i = output_filename.size() - ext_len - 1, j = 0; j < 5; --i, ++j )
+ 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';
@@ -495,10 +529,10 @@ int compress( const unsigned long long member_size,
}
-unsigned char xdigit( const int value )
+unsigned char xdigit( const unsigned value )
{
- if( value >= 0 && value <= 9 ) return '0' + value;
- if( value >= 10 && value <= 15 ) return 'A' + value - 10;
+ if( value <= 9 ) return '0' + value;
+ if( value <= 15 ) return 'A' + value - 10;
return 0;
}
@@ -512,26 +546,18 @@ bool show_trailing_data( const uint8_t * const data, const int size,
std::string msg;
if( !all ) msg = "first bytes of ";
msg += "trailing data = ";
- bool text = true;
for( int i = 0; i < size; ++i )
- if( !std::isprint( data[i] ) ) { text = false; break; }
- if( text )
{
- msg += '\'';
- msg.append( (const char *)data, size );
- msg += '\'';
- }
- else
- {
- for( int i = 0; i < size; ++i )
- {
- if( i > 0 ) msg += ' ';
- msg += xdigit( data[i] >> 4 );
- msg += xdigit( data[i] & 0x0F );
- }
+ 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 ) show_error( "Trailing data not allowed." );
+ if( !ignore_trailing ) show_file_error( pp.name(), trailing_msg );
}
return ignore_trailing;
}
@@ -562,22 +588,16 @@ int decompress( const int infd, const Pretty_print & pp,
if( !header.verify_magic() )
{
if( first_member )
- { pp( "Bad magic number (file not in lzip format)." ); retval = 2; }
+ { show_file_error( pp.name(), bad_magic_msg ); retval = 2; }
else if( !show_trailing_data( header.data, size, pp, false, ignore_trailing ) )
retval = 2;
break;
}
if( !header.verify_version() )
- {
- if( verbosity >= 0 )
- { pp();
- std::fprintf( stderr, "Version %d member format not supported.\n",
- header.version() ); }
- retval = 2; break;
- }
+ { pp( bad_version( header.version() ) ); retval = 2; break; }
const unsigned dictionary_size = header.dictionary_size();
if( !isvalid_ds( dictionary_size ) )
- { pp( "Invalid dictionary size in member header." ); retval = 2; break; }
+ { pp( bad_dict_msg ); retval = 2; break; }
if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
{ pp(); show_header( dictionary_size ); }
@@ -640,6 +660,16 @@ void show_error( const char * const msg, const int errcode, const bool help )
}
+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 )
@@ -693,7 +723,6 @@ int main( const int argc, const char * const argv[] )
const unsigned long long max_volume_size = 0x4000000000000000ULL;
unsigned long long member_size = max_member_size;
unsigned long long volume_size = 0;
- std::string input_filename;
std::string default_output_filename;
std::vector< std::string > filenames;
int infd = -1;
@@ -726,6 +755,7 @@ int main( const int argc, const char * const argv[] )
{ '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 },
@@ -746,8 +776,8 @@ int main( const int argc, const char * const argv[] )
{
const int code = parser.code( argind );
if( !code ) break; // no more options
- const std::string & arg = parser.argument( argind );
- const char * const ptr = arg.c_str();
+ 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':
@@ -755,23 +785,24 @@ int main( const int argc, const char * const argv[] )
zero = ( code == '0' );
encoder_options = option_mapping[code-'0']; break;
case 'a': ignore_trailing = false; break;
- case 'b': member_size = getnum( ptr, 100000, max_member_size ); break;
+ case 'b': member_size = getnum( arg, 100000, max_member_size ); break;
case 'c': to_stdout = true; break;
- case 'd': program_mode = m_decompress; 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( ptr, min_match_len_limit, max_match_len );
+ getnum( arg, min_match_len_limit, max_match_len );
zero = false; break;
case 'n': break;
- case 'o': default_output_filename = arg; break;
+ case 'o': default_output_filename = sarg; break;
case 'q': verbosity = -1; break;
- case 's': encoder_options.dictionary_size = get_dict_size( ptr );
+ case 's': encoder_options.dictionary_size = get_dict_size( arg );
zero = false; break;
- case 'S': volume_size = getnum( ptr, 100000, max_volume_size ); break;
- case 't': program_mode = m_test; 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;
default : internal_error( "uncaught option." );
@@ -783,6 +814,17 @@ int main( const int argc, const char * const argv[] )
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 );
+
if( program_mode == m_test )
outfd = -1;
else if( program_mode == m_compress )
@@ -791,14 +833,6 @@ int main( const int argc, const char * const argv[] )
prob_prices.init();
}
- 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( !to_stdout && program_mode != m_test &&
( filenames_given || default_output_filename.size() ) )
set_signals();
@@ -809,13 +843,13 @@ int main( const int argc, const char * const argv[] )
bool stdin_used = false;
for( unsigned i = 0; i < filenames.size(); ++i )
{
+ std::string input_filename;
struct stat in_stats;
output_filename.clear();
if( filenames[i].empty() || filenames[i] == "-" )
{
if( stdin_used ) continue; else stdin_used = true;
- input_filename.clear();
infd = STDIN_FILENO;
if( program_mode != m_test )
{
@@ -837,10 +871,9 @@ int main( const int argc, const char * const argv[] )
}
else
{
- input_filename = filenames[i];
- const int eindex = extension_index( input_filename );
- infd = open_instream( input_filename.c_str(), &in_stats, program_mode,
- eindex, recompress, to_stdout );
+ 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 )
{
@@ -860,14 +893,15 @@ int main( const int argc, const char * const argv[] )
}
}
- if( !check_tty( infd, program_mode ) )
+ 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 ); infd = -1; continue; }
cleanup_and_fail( retval );
}
const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0;
- pp.set_name( input_filename );
int tmp;
if( program_mode == m_compress )
tmp = compress( member_size, volume_size, infd, encoder_options, pp,