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bzip2: implement -1..-9 command line flags

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This commit is contained in:
Denis Vlasenko 2007-10-14 07:51:19 +00:00
parent 6a9154b6f6
commit b6ccd32e3f
1 changed files with 30 additions and 7 deletions
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37
archival/bzip2.c
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@ -120,6 +120,7 @@ USE_DESKTOP(long long) int bz_write_tail(bz_stream *strm, void *wbuf)
return total;
}
static uint8_t level;
static
USE_DESKTOP(long long) int compressStream(void)
@ -134,7 +135,7 @@ USE_DESKTOP(long long) int compressStream(void)
iobuf = xmalloc(2 * IOBUF_SIZE);
BZ2_bzCompressInit(strm, 9 /*blockSize100k*/);
BZ2_bzCompressInit(strm, level);
while (1) {
count = full_read(STDIN_FILENO, rbuf, IOBUF_SIZE);
@ -166,17 +167,39 @@ int bzip2_main(int argc, char **argv)
{
unsigned opt;
/* standard bzip2 flags
* -d --decompress force decompression
* -z --compress force compression
* -k --keep keep (don't delete) input files
* -f --force overwrite existing output files
* -t --test test compressed file integrity
* -c --stdout output to standard out
* -q --quiet suppress noncritical error messages
* -v --verbose be verbose (a 2nd -v gives more)
* -s --small use less memory (at most 2500k)
* -1 .. -9 set block size to 100k .. 900k
* --fast alias for -1
* --best alias for -9
*/
/* Must match bbunzip's constants OPT_STDOUT, OPT_FORCE! */
opt = getopt32(argv, "cfv" USE_BUNZIP2("d") "q123456789" );
opt = getopt32(argv, "cfv" USE_BUNZIP2("d") "123456789qzs" );
#if ENABLE_BUNZIP2 /* bunzip2_main may not be visible... */
if (opt & 0x8) // -d
return bunzip2_main(argc, argv);
opt >>= 4;
#else
opt >>= 3;
#endif
option_mask32 &= 0x7; /* ignore -q, -0..9 */
//if (opt & 0x1) // -c
//if (opt & 0x2) // -f
//if (opt & 0x4) // -v
argv += optind;
opt = (uint8_t)opt; /* isolate bits for -1..-8 */
opt |= 0x100; /* if nothing else, assume -9 */
level = 1;
while (!(opt & 1)) {
level++;
opt >>= 1;
}
argv += optind;
option_mask32 &= 0x7; /* ignore all except -cfv */
return bbunpack(argv, make_new_name_bzip2, compressStream);
}