* about bzip2 library code.
*/
+//config:config BZIP2
+//config: bool "bzip2"
+//config: default y
+//config: help
+//config: bzip2 is a compression utility using the Burrows-Wheeler block
+//config: sorting text compression algorithm, and Huffman coding. Compression
+//config: is generally considerably better than that achieved by more
+//config: conventional LZ77/LZ78-based compressors, and approaches the
+//config: performance of the PPM family of statistical compressors.
+//config:
+//config: Unless you have a specific application which requires bzip2, you
+//config: should probably say N here.
+
+//applet:IF_BZIP2(APPLET(bzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_BZIP2) += bzip2.o
+
+//usage:#define bzip2_trivial_usage
+//usage: "[OPTIONS] [FILE]..."
+//usage:#define bzip2_full_usage "\n\n"
+//usage: "Compress FILEs (or stdin) with bzip2 algorithm\n"
+//usage: "\n -1..9 Compression level"
+//usage: "\n -d Decompress"
+//usage: "\n -c Write to stdout"
+//usage: "\n -f Force"
+
#include "libbb.h"
+#include "bb_archive.h"
-#define CONFIG_BZIP2_FEATURE_SPEED 1
+#define CONFIG_BZIP2_FAST 1
/* Speed test:
* Compiled with gcc 4.2.1, run on Athlon 64 1800 MHz (512K L2 cache).
* (time to compress gcc-4.2.1.tar is 126.4% compared to bbox).
* At SPEED 5 difference is 32.7%.
*
- * Test run of all CONFIG_BZIP2_FEATURE_SPEED values on a 11Mb text file:
+ * Test run of all CONFIG_BZIP2_FAST values on a 11Mb text file:
* Size Time (3 runs)
* 0: 10828 4.145 4.146 4.148
* 1: 11097 3.845 3.860 3.861
/* Takes ~300 bytes, detects corruption caused by bad RAM etc */
#define BZ_LIGHT_DEBUG 0
-#include "bz/bzlib.h"
+#include "libarchive/bz/bzlib.h"
-#include "bz/bzlib_private.h"
+#include "libarchive/bz/bzlib_private.h"
-#include "bz/blocksort.c"
-#include "bz/bzlib.c"
-#include "bz/compress.c"
-#include "bz/huffman.c"
+#include "libarchive/bz/blocksort.c"
+#include "libarchive/bz/bzlib.c"
+#include "libarchive/bz/compress.c"
+#include "libarchive/bz/huffman.c"
/* No point in being shy and having very small buffer here.
* bzip2 internal buffers are much bigger anyway, hundreds of kbytes.
* total written bytes so far otherwise
*/
static
-USE_DESKTOP(long long) int bz_write(bz_stream *strm, void* rbuf, ssize_t rlen, void *wbuf)
+IF_DESKTOP(long long) int bz_write(bz_stream *strm, void* rbuf, ssize_t rlen, void *wbuf)
{
int n, n2, ret;
if (n2 != n) {
if (n2 >= 0)
errno = 0; /* prevent bogus error message */
- bb_perror_msg(n2 >= 0 ? "short write" : "write error");
+ bb_perror_msg(n2 >= 0 ? "short write" : bb_msg_write_error);
return -1;
}
}
if (rlen && strm->avail_in == 0)
break;
}
- return 0 USE_DESKTOP( + strm->total_out );
+ return 0 IF_DESKTOP( + strm->total_out );
}
static
-USE_DESKTOP(long long) int compressStream(void)
+IF_DESKTOP(long long) int FAST_FUNC compressStream(transformer_aux_data_t *aux UNUSED_PARAM)
{
- USE_DESKTOP(long long) int total;
+ IF_DESKTOP(long long) int total;
ssize_t count;
bz_stream bzs; /* it's small */
#define strm (&bzs)
while (1) {
count = full_read(STDIN_FILENO, rbuf, IOBUF_SIZE);
if (count < 0) {
- bb_perror_msg("read error");
+ bb_perror_msg(bb_msg_read_error);
total = -1;
break;
}
break;
}
-#if ENABLE_FEATURE_CLEAN_UP
+ /* Can't be conditional on ENABLE_FEATURE_CLEAN_UP -
+ * we are called repeatedly
+ */
BZ2_bzCompressEnd(strm);
free(iobuf);
-#endif
- return total;
-}
-static
-char* make_new_name_bzip2(char *filename)
-{
- return xasprintf("%s.bz2", filename);
+ return total;
}
int bzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int bzip2_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int bzip2_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opt;
opt_complementary = "s2"; /* -s means -2 (compatibility) */
/* Must match bbunzip's constants OPT_STDOUT, OPT_FORCE! */
- opt = getopt32(argv, "cfv" USE_BUNZIP2("d") "123456789qzs" );
+ opt = getopt32(argv, "cfv" IF_BUNZIP2("dt") "123456789qzs");
#if ENABLE_BUNZIP2 /* bunzip2_main may not be visible... */
- if (opt & 0x8) // -d
+ if (opt & 0x18) // -d and/or -t
return bunzip2_main(argc, argv);
- opt >>= 4;
+ opt >>= 5;
#else
opt >>= 3;
#endif
argv += optind;
option_mask32 &= 0x7; /* ignore all except -cfv */
- return bbunpack(argv, make_new_name_bzip2, compressStream);
+ return bbunpack(argv, compressStream, append_ext, "bz2");
}