diff options
Diffstat (limited to 'zcmp.cc')
| -rw-r--r-- | zcmp.cc | 44 |
1 files changed, 27 insertions, 17 deletions
@@ -1,5 +1,5 @@ /* Zcmp - decompress and compare two files byte by byte - Copyright (C) 2010-2016 Antonio Diaz Diaz. + Copyright (C) 2010-2017 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 @@ -57,21 +57,21 @@ void show_help() "fly; no temporary files are created.\n" "\nThe supported formats are bzip2, gzip, lzip and xz.\n" "\nUsage: zcmp [options] file1 [file2]\n" - "\nCompares <file1> to <file2>. If <file2> is omitted zcmp tries the\n" + "\nZcmp compares file1 to file2. If file2 is omitted zcmp tries the\n" "following:\n" - "\n 1. If <file1> is compressed, compares its decompressed contents with\n" - " the corresponding uncompressed file (the name of <file1> with the\n" + "\n 1. If file1 is compressed, compares its decompressed contents with\n" + " the corresponding uncompressed file (the name of file1 with the\n" " extension removed).\n" - "\n 2. If <file1> is uncompressed, compares it with the decompressed\n" - " contents of <file1>.[lz|bz2|gz|xz] (the first one that is found).\n" - "\n 3. If no suitable file is found, compares <file1> with data read from\n" + "\n 2. If file1 is uncompressed, compares it with the decompressed\n" + " contents of file1.[lz|bz2|gz|xz] (the first one that is found).\n" + "\n 3. If no suitable file is found, compares file1 with data read from\n" " standard input.\n" "\nExit status is 0 if inputs are identical, 1 if different, 2 if trouble.\n" "\nOptions:\n" " -h, --help display this help and exit\n" " -V, --version output version information and exit\n" " -b, --print-bytes print differing bytes\n" - " -i, --ignore-initial=<n>[,<n2>] ignore differences in the first <n> bytes\n" + " -i, --ignore-initial=<n>[:<n2>] ignore differences in the first <n> bytes\n" " -l, --list list position, value of all differing bytes\n" " -M, --format=<list> process only the formats in <list>\n" " -n, --bytes=<n> compare at most <n> bytes\n" @@ -94,8 +94,8 @@ long long getnum( const char * const ptr, const char ** const tailp = 0, const long long llimit = 0, const long long ulimit = LLONG_MAX ) { - errno = 0; char * tail; + errno = 0; long long result = strtoll( ptr, &tail, 0 ); if( tail == ptr ) { @@ -106,9 +106,13 @@ long long getnum( const char * const ptr, const char ** const tailp = 0, if( !errno && tail[0] && std::isalpha( tail[0] ) ) { - const int factor = ( tail[1] == 'i' ) ? 1024 : 1000; - int exponent = 0; // 0 = bad multiplier - switch( tail[0] ) + const unsigned char ch = *tail++; + int factor; + bool bsuf; // 'B' suffix is present + if( tail[0] == 'i' ) { ++tail; factor = 1024; } else factor = 1000; + if( tail[0] == 'B' ) { ++tail; bsuf = true; } else bsuf = false; + int exponent = -1; // -1 = bad multiplier + switch( ch ) { case 'Y': exponent = 8; break; case 'Z': exponent = 7; break; @@ -119,8 +123,9 @@ long long getnum( const char * const ptr, const char ** const tailp = 0, case 'M': exponent = 2; break; case 'K': if( factor == 1024 ) exponent = 1; break; case 'k': if( factor == 1000 ) exponent = 1; break; + case 'B': if( factor == 1000 && !bsuf ) exponent = 0; break; } - if( exponent <= 0 ) + if( exponent < 0 ) { show_error( "Bad multiplier in numerical argument.", 0, true ); std::exit( 2 ); @@ -146,9 +151,14 @@ void parse_ignore_initial( const char * const arg, long long ignore_initial[2] ) { const char * tail; ignore_initial[0] = getnum( arg, &tail ); - if( *tail == ',' || *tail == ':' ) + if( *tail == ':' || *tail == ',' ) ignore_initial[1] = getnum( ++tail ); - else ignore_initial[1] = ignore_initial[0]; + else if( *tail == 0 ) ignore_initial[1] = ignore_initial[0]; + else + { + show_error( "Bad separator in argument of '--ignore-initial'", 0, true ); + std::exit( 2 ); + } } @@ -418,8 +428,8 @@ int main( const int argc, const char * const argv[] ) int old_infd[2]; // copy of file descriptors of the two files old_infd[0] = infd[0]; old_infd[1] = infd[1]; Children children[2]; - if( !set_data_feeder( &infd[0], children[0], format_types[0] ) || - !set_data_feeder( &infd[1], children[1], format_types[1] ) ) + if( !set_data_feeder( filenames[0], &infd[0], children[0], format_types[0] ) || + !set_data_feeder( filenames[1], &infd[1], children[1], format_types[1] ) ) return 2; for( int i = 0; i < 2; ++i ) |