2 This file is part of the lzop file compressor.
4 Copyright (C) 1996..2003 Markus Franz Xaver Johannes Oberhumer
7 Markus F.X.J. Oberhumer <markus@oberhumer.com>
8 http://www.oberhumer.com/opensource/lzop/
10 lzop and the LZO library are free software; you can redistribute them
11 and/or modify them under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2 of
13 the License, or (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; see the file COPYING.
22 If not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 "Minimalized" for busybox by Alain Knaff
28 //usage:#define lzop_trivial_usage
29 //usage: "[-cfvd123456789CF] [FILE]..."
30 //usage:#define lzop_full_usage "\n\n"
31 //usage: " -1..9 Compression level"
32 //usage: "\n -d Decompress"
33 //usage: "\n -c Write to stdout"
34 //usage: "\n -f Force"
35 //usage: "\n -v Verbose"
36 //usage: "\n -F Don't store or verify checksum"
37 //usage: "\n -C Also write checksum of compressed block"
39 //usage:#define lzopcat_trivial_usage
40 //usage: "[-vCF] [FILE]..."
41 //usage:#define lzopcat_full_usage "\n\n"
42 //usage: " -v Verbose"
43 //usage: "\n -F Don't store or verify checksum"
45 //usage:#define unlzop_trivial_usage
46 //usage: "[-cfvCF] [FILE]..."
47 //usage:#define unlzop_full_usage "\n\n"
48 //usage: " -c Write to stdout"
49 //usage: "\n -f Force"
50 //usage: "\n -v Verbose"
51 //usage: "\n -F Don't store or verify checksum"
54 #include "bb_archive.h"
55 #include "liblzo_interface.h"
57 /* lzo-2.03/src/lzo_ptr.h */
58 #define pd(a,b) ((unsigned)((a)-(b)))
60 #define lzo_version() LZO_VERSION
61 #define lzo_sizeof_dict_t (sizeof(uint8_t*))
63 /* lzo-2.03/include/lzo/lzo1x.h */
64 #define LZO1X_1_MEM_COMPRESS (16384 * lzo_sizeof_dict_t)
65 #define LZO1X_1_15_MEM_COMPRESS (32768 * lzo_sizeof_dict_t)
66 #define LZO1X_999_MEM_COMPRESS (14 * 16384 * sizeof(short))
68 /* lzo-2.03/src/lzo1x_oo.c */
69 #define NO_LIT UINT_MAX
71 /**********************************************************************/
72 static void copy2(uint8_t* ip
, const uint8_t* m_pos
, unsigned off
)
81 static void copy3(uint8_t* ip
, const uint8_t* m_pos
, unsigned off
)
85 ip
[2] = ip
[1] = m_pos
[0];
97 /**********************************************************************/
98 // optimize a block of data.
99 /**********************************************************************/
100 #define TEST_IP (ip < ip_end)
101 #define TEST_OP (op <= op_end)
103 static NOINLINE
int lzo1x_optimize(uint8_t *in
, unsigned in_len
,
104 uint8_t *out
, unsigned *out_len
,
105 void* wrkmem UNUSED_PARAM
)
111 uint8_t* const ip_end
= in
+ in_len
;
112 uint8_t* const op_end
= out
+ *out_len
;
113 uint8_t* litp
= NULL
;
115 unsigned next_lit
= NO_LIT
;
117 unsigned long o_m1_a
= 0, o_m1_b
= 0, o_m2
= 0, o_m3_a
= 0, o_m3_b
= 0;
119 // LZO_UNUSED(wrkmem);
130 goto first_literal_run
;
133 while (TEST_IP
&& TEST_OP
) {
152 do *op
++ = *ip
++; while (--t
> 0);
159 m_pos
= op
- 1 - 0x800;
161 m_pos
= op
- 1 - 0x400;
174 if (t
< 16) { /* a M1 match */
183 /* test if a match follows */
184 if (nl
== 0 && lit
== 1 && ip
[0] >= 16) {
186 /* adjust length of previous short run */
188 *litp
= (unsigned char)((*litp
& ~3) | lit
);
189 /* copy over the 2 literals that replace the match */
190 copy2(ip
-2, m_pos
, pd(op
, m_pos
));
193 /* test if a literal run follows */
198 && (lit
+ 2 + ip
[0] < 16)
201 /* remove short run */
203 /* copy over the 2 literals that replace the match */
204 copy2(ip
-3+1, m_pos
, pd(op
, m_pos
));
205 /* move literals 1 byte ahead */
208 memmove(litp
+1, litp
, lit
);
209 /* insert new length of long literal run */
211 *litp
= (unsigned char)(lit
- 3);
216 goto copy_literal_run
;
223 if (t
>= 64) { /* a M2 match */
226 m_pos
-= (t
>> 2) & 7;
230 m_pos
-= (t
>> 2) & 3;
238 /* test if in beetween two long literal runs */
239 if (t
== 1 && lit
> 3 && nl
== 0
240 && ip
[0] < 16 && ip
[0] != 0 && (lit
+ 3 + ip
[0] < 16)
243 /* copy over the 3 literals that replace the match */
244 copy3(ip
-1-2, m_pos
, pd(op
, m_pos
));
245 /* set new length of previous literal run */
247 *litp
= (unsigned char)(lit
- 3);
252 goto copy_literal_run
;
255 if (t
>= 32) { /* a M3 match */
266 } else { /* a M4 match */
268 m_pos
-= (t
& 8) << 11;
286 /* test if in beetween two matches */
287 if (t
== 1 && lit
== 0 && nl
== 0 && ip
[0] >= 16) {
289 /* make a previous short run */
291 *litp
= (unsigned char)((*litp
& ~3) | lit
);
292 /* copy over the 3 literals that replace the match */
293 copy3(ip
-3, m_pos
, pd(op
, m_pos
));
296 /* test if a literal run follows */
297 else if (t
== 1 && lit
<= 3 && nl
== 0
298 && ip
[0] < 16 && ip
[0] != 0 && (lit
+ 3 + ip
[0] < 16)
301 /* remove short run */
303 /* copy over the 3 literals that replace the match */
304 copy3(ip
-4+1, m_pos
, pd(op
, m_pos
));
305 /* move literals 1 byte ahead */
308 memmove(litp
+1,litp
,lit
);
309 /* insert new length of long literal run */
311 *litp
= (unsigned char)(lit
- 3);
317 goto copy_literal_run
;
323 do *op
++ = *m_pos
++; while (--t
> 0);
327 if (next_lit
== NO_LIT
) {
339 do *op
++ = *ip
++; while (--t
> 0);
341 } while (TEST_IP
&& TEST_OP
);
344 /* no EOF code was found */
345 *out_len
= pd(op
, out
);
346 return LZO_E_EOF_NOT_FOUND
;
349 // LZO_UNUSED(o_m1_a); LZO_UNUSED(o_m1_b); LZO_UNUSED(o_m2);
350 // LZO_UNUSED(o_m3_a); LZO_UNUSED(o_m3_b);
351 *out_len
= pd(op
, out
);
352 return (ip
== ip_end
? LZO_E_OK
:
353 (ip
< ip_end
? LZO_E_INPUT_NOT_CONSUMED
: LZO_E_INPUT_OVERRUN
));
356 /**********************************************************************/
357 #define F_OS F_OS_UNIX
358 #define F_CS F_CS_NATIVE
360 /**********************************************************************/
361 #define ADLER32_INIT_VALUE 1
362 #define CRC32_INIT_VALUE 0
364 /**********************************************************************/
371 /**********************************************************************/
373 #define F_ADLER32_D 0x00000001L
374 #define F_ADLER32_C 0x00000002L
375 #define F_H_EXTRA_FIELD 0x00000040L
376 #define F_H_GMTDIFF 0x00000080L
377 #define F_CRC32_D 0x00000100L
378 #define F_CRC32_C 0x00000200L
379 #define F_H_FILTER 0x00000800L
380 #define F_H_CRC32 0x00001000L
381 #define F_MASK 0x00003FFFL
383 /* operating system & file system that created the file [mostly unused] */
384 #define F_OS_UNIX 0x03000000L
385 #define F_OS_SHIFT 24
386 #define F_OS_MASK 0xff000000L
388 /* character set for file name encoding [mostly unused] */
389 #define F_CS_NATIVE 0x00000000L
390 #define F_CS_SHIFT 20
391 #define F_CS_MASK 0x00f00000L
393 /* these bits must be zero */
394 #define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
396 typedef struct chksum_t
{
401 typedef struct header_t
{
403 unsigned lib_version
;
404 unsigned version_needed_to_extract
;
409 uint32_t header_checksum
;
411 uint32_t extra_field_len
;
412 uint32_t extra_field_checksum
;
414 unsigned char method
;
422 /*const uint32_t *lzo_crc32_table;*/
426 #define G (*(struct globals*)&bb_common_bufsiz1)
427 #define INIT_G() do { } while (0)
428 //#define G (*ptr_to_globals)
429 //#define INIT_G() do {
430 // SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
434 /**********************************************************************/
435 #define LZOP_VERSION 0x1010
436 //#define LZOP_VERSION_STRING "1.01"
437 //#define LZOP_VERSION_DATE "Apr 27th 2003"
439 #define OPTION_STRING "cfvdt123456789CF"
442 OPT_STDOUT
= (1 << 0),
443 OPT_FORCE
= (1 << 1),
444 OPT_VERBOSE
= (1 << 2),
445 OPT_DECOMPRESS
= (1 << 3),
460 /**********************************************************************/
462 // adapted from free code by Mark Adler <madler@alumni.caltech.edu>
463 // see http://www.zlib.org/
464 /**********************************************************************/
465 static FAST_FUNC
uint32_t
466 lzo_adler32(uint32_t adler
, const uint8_t* buf
, unsigned len
)
469 LZO_BASE
= 65521, /* largest prime smaller than 65536 */
470 /* NMAX is the largest n such that
471 * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
474 uint32_t s1
= adler
& 0xffff;
475 uint32_t s2
= (adler
>> 16) & 0xffff;
482 k
= len
< LZO_NMAX
? (unsigned) len
: LZO_NMAX
;
491 return (s2
<< 16) | s1
;
494 static FAST_FUNC
uint32_t
495 lzo_crc32(uint32_t c
, const uint8_t* buf
, unsigned len
)
497 //if (buf == NULL) - impossible
500 return ~crc32_block_endian0(~c
, buf
, len
, global_crc32_table
);
503 /**********************************************************************/
504 static void init_chksum(chksum_t
*ct
)
506 ct
->f_adler32
= ADLER32_INIT_VALUE
;
507 ct
->f_crc32
= CRC32_INIT_VALUE
;
510 static void add_bytes_to_chksum(chksum_t
*ct
, const void* buf
, int cnt
)
512 /* We need to handle the two checksums at once, because at the
513 * beginning of the header, we don't know yet which one we'll
515 ct
->f_adler32
= lzo_adler32(ct
->f_adler32
, (const uint8_t*)buf
, cnt
);
516 ct
->f_crc32
= lzo_crc32(ct
->f_crc32
, (const uint8_t*)buf
, cnt
);
519 static uint32_t chksum_getresult(chksum_t
*ct
, const header_t
*h
)
521 return (h
->flags
& F_H_CRC32
) ? ct
->f_crc32
: ct
->f_adler32
;
524 /**********************************************************************/
525 static uint32_t read32(void)
532 static void write32(uint32_t v
)
538 static void f_write(const void* buf
, int cnt
)
541 add_bytes_to_chksum(&G
.chksum_out
, buf
, cnt
);
544 static void f_read(void* buf
, int cnt
)
547 add_bytes_to_chksum(&G
.chksum_in
, buf
, cnt
);
550 static int f_read8(void)
557 static void f_write8(uint8_t v
)
562 static unsigned f_read16(void)
569 static void f_write16(uint16_t v
)
575 static uint32_t f_read32(void)
582 static void f_write32(uint32_t v
)
588 /**********************************************************************/
589 static int lzo_get_method(header_t
*h
)
592 if (h
->method
== M_LZO1X_1
) {
595 } else if (h
->method
== M_LZO1X_1_15
) {
598 } else if (h
->method
== M_LZO1X_999
) {
602 return -1; /* not a LZO method */
604 /* check compression level */
605 if (h
->level
< 1 || h
->level
> 9)
611 /**********************************************************************/
612 #define LZO_BLOCK_SIZE (256 * 1024l)
613 #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
615 /* LZO may expand uncompressible data by a small amount */
616 #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
618 /**********************************************************************/
620 /**********************************************************************/
621 static NOINLINE smallint
lzo_compress(const header_t
*h
)
623 unsigned block_size
= LZO_BLOCK_SIZE
;
624 int r
= 0; /* LZO_E_OK */
625 uint8_t *const b1
= xzalloc(block_size
);
626 uint8_t *const b2
= xzalloc(MAX_COMPRESSED_SIZE(block_size
));
627 unsigned src_len
= 0, dst_len
= 0;
628 uint32_t d_adler32
= ADLER32_INIT_VALUE
;
629 uint32_t d_crc32
= CRC32_INIT_VALUE
;
632 uint8_t *wrk_mem
= NULL
;
634 if (h
->method
== M_LZO1X_1
)
635 wrk_mem
= xzalloc(LZO1X_1_MEM_COMPRESS
);
636 else if (h
->method
== M_LZO1X_1_15
)
637 wrk_mem
= xzalloc(LZO1X_1_15_MEM_COMPRESS
);
638 else if (h
->method
== M_LZO1X_999
)
639 wrk_mem
= xzalloc(LZO1X_999_MEM_COMPRESS
);
643 l
= full_read(0, b1
, block_size
);
644 src_len
= (l
> 0 ? l
: 0);
646 /* write uncompressed block size */
649 /* exit if last block */
653 /* compute checksum of uncompressed block */
654 if (h
->flags
& F_ADLER32_D
)
655 d_adler32
= lzo_adler32(ADLER32_INIT_VALUE
, b1
, src_len
);
656 if (h
->flags
& F_CRC32_D
)
657 d_crc32
= lzo_crc32(CRC32_INIT_VALUE
, b1
, src_len
);
660 if (h
->method
== M_LZO1X_1
)
661 r
= lzo1x_1_compress(b1
, src_len
, b2
, &dst_len
, wrk_mem
);
662 else if (h
->method
== M_LZO1X_1_15
)
663 r
= lzo1x_1_15_compress(b1
, src_len
, b2
, &dst_len
, wrk_mem
);
664 #if ENABLE_LZOP_COMPR_HIGH
665 else if (h
->method
== M_LZO1X_999
)
666 r
= lzo1x_999_compress_level(b1
, src_len
, b2
, &dst_len
,
670 bb_error_msg_and_die("internal error");
672 if (r
!= 0) /* not LZO_E_OK */
673 bb_error_msg_and_die("internal error - compression failed");
675 /* write compressed block size */
676 if (dst_len
< src_len
) {
678 if (h
->method
== M_LZO1X_999
) {
679 unsigned new_len
= src_len
;
680 r
= lzo1x_optimize(b2
, dst_len
, b1
, &new_len
, NULL
);
681 if (r
!= 0 /*LZO_E_OK*/ || new_len
!= src_len
)
682 bb_error_msg_and_die("internal error - optimization failed");
686 /* data actually expanded => store data uncompressed */
690 /* write checksum of uncompressed block */
691 if (h
->flags
& F_ADLER32_D
)
693 if (h
->flags
& F_CRC32_D
)
696 if (dst_len
< src_len
) {
697 /* write checksum of compressed block */
698 if (h
->flags
& F_ADLER32_C
)
699 write32(lzo_adler32(ADLER32_INIT_VALUE
, b2
, dst_len
));
700 if (h
->flags
& F_CRC32_C
)
701 write32(lzo_crc32(CRC32_INIT_VALUE
, b2
, dst_len
));
702 /* write compressed block data */
703 xwrite(1, b2
, dst_len
);
705 /* write uncompressed block data */
706 xwrite(1, b1
, src_len
);
716 static FAST_FUNC
void lzo_check(
718 uint8_t* buf
, unsigned len
,
719 uint32_t FAST_FUNC (*fn
)(uint32_t, const uint8_t*, unsigned),
722 /* This function, by having the same order of parameters
723 * as fn, and by being marked FAST_FUNC (same as fn),
724 * saves a dozen bytes of code.
726 uint32_t c
= fn(init
, buf
, len
);
728 bb_error_msg_and_die("checksum error");
731 /**********************************************************************/
733 /**********************************************************************/
734 static NOINLINE smallint
lzo_decompress(const header_t
*h
)
736 unsigned block_size
= LZO_BLOCK_SIZE
;
738 uint32_t src_len
, dst_len
;
739 uint32_t c_adler32
= ADLER32_INIT_VALUE
;
740 uint32_t d_adler32
= ADLER32_INIT_VALUE
;
741 uint32_t c_crc32
= CRC32_INIT_VALUE
, d_crc32
= CRC32_INIT_VALUE
;
744 uint32_t mcs_block_size
= MAX_COMPRESSED_SIZE(block_size
);
750 /* read uncompressed block size */
753 /* exit if last block */
757 /* error if split file */
758 if (dst_len
== 0xffffffffL
)
759 /* should not happen - not yet implemented */
760 bb_error_msg_and_die("this file is a split lzop file");
762 if (dst_len
> MAX_BLOCK_SIZE
)
763 bb_error_msg_and_die("corrupted data");
765 /* read compressed block size */
767 if (src_len
<= 0 || src_len
> dst_len
)
768 bb_error_msg_and_die("corrupted data");
770 if (dst_len
> block_size
) {
775 block_size
= dst_len
;
776 mcs_block_size
= MAX_COMPRESSED_SIZE(block_size
);
779 /* read checksum of uncompressed block */
780 if (h
->flags
& F_ADLER32_D
)
781 d_adler32
= read32();
782 if (h
->flags
& F_CRC32_D
)
785 /* read checksum of compressed block */
786 if (src_len
< dst_len
) {
787 if (h
->flags
& F_ADLER32_C
)
788 c_adler32
= read32();
789 if (h
->flags
& F_CRC32_C
)
794 b2
= xzalloc(mcs_block_size
);
795 /* read the block into the end of our buffer */
796 b1
= b2
+ mcs_block_size
- src_len
;
797 xread(0, b1
, src_len
);
799 if (src_len
< dst_len
) {
800 unsigned d
= dst_len
;
802 if (!(option_mask32
& OPT_F
)) {
803 /* verify checksum of compressed block */
804 if (h
->flags
& F_ADLER32_C
)
805 lzo_check(ADLER32_INIT_VALUE
,
807 lzo_adler32
, c_adler32
);
808 if (h
->flags
& F_CRC32_C
)
809 lzo_check(CRC32_INIT_VALUE
,
815 // if (option_mask32 & OPT_F)
816 // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
818 r
= lzo1x_decompress_safe(b1
, src_len
, b2
, &d
, NULL
);
820 if (r
!= 0 /*LZO_E_OK*/ || dst_len
!= d
) {
821 bb_error_msg_and_die("corrupted data");
825 /* "stored" block => no decompression */
829 if (!(option_mask32
& OPT_F
)) {
830 /* verify checksum of uncompressed block */
831 if (h
->flags
& F_ADLER32_D
)
832 lzo_check(ADLER32_INIT_VALUE
,
834 lzo_adler32
, d_adler32
);
835 if (h
->flags
& F_CRC32_D
)
836 lzo_check(CRC32_INIT_VALUE
,
841 /* write uncompressed block data */
842 xwrite(1, dst
, dst_len
);
849 /**********************************************************************/
850 // lzop file signature (shamelessly borrowed from PNG)
851 /**********************************************************************/
853 * The first nine bytes of a lzop file always contain the following values:
856 * --- --- --- --- --- --- --- --- ---
857 * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
858 * (decimal) 137 76 90 79 0 13 10 26 10
859 * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
862 /* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
863 * Only slight differences in header:
864 * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
865 * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
867 * version lib_version
868 * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
869 * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
870 * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
872 * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
873 * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
876 * The rest is identical.
878 static const unsigned char lzop_magic
[9] = {
879 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
882 /* This coding is derived from Alexander Lehmann's pngcheck code. */
883 static void check_magic(void)
885 unsigned char magic
[sizeof(lzop_magic
)];
886 xread(0, magic
, sizeof(magic
));
887 if (memcmp(magic
, lzop_magic
, sizeof(lzop_magic
)) != 0)
888 bb_error_msg_and_die("bad magic number");
891 /**********************************************************************/
893 /**********************************************************************/
894 static void write_header(const header_t
*h
)
898 xwrite(1, lzop_magic
, sizeof(lzop_magic
));
900 init_chksum(&G
.chksum_out
);
902 f_write16(h
->version
);
903 f_write16(h
->lib_version
);
904 f_write16(h
->version_needed_to_extract
);
910 f_write32(h
->gmtdiff
);
912 l
= (int) strlen(h
->name
);
917 f_write32(chksum_getresult(&G
.chksum_out
, h
));
920 static int read_header(header_t
*h
)
926 memset(h
, 0, sizeof(*h
));
927 h
->version_needed_to_extract
= 0x0900; /* first lzop version */
930 init_chksum(&G
.chksum_in
);
932 h
->version
= f_read16();
933 if (h
->version
< 0x0900)
935 h
->lib_version
= f_read16();
936 if (h
->version
>= 0x0940) {
937 h
->version_needed_to_extract
= f_read16();
938 if (h
->version_needed_to_extract
> LZOP_VERSION
)
940 if (h
->version_needed_to_extract
< 0x0900)
943 h
->method
= f_read8();
944 if (h
->version
>= 0x0940)
945 h
->level
= f_read8();
946 h
->flags
= f_read32();
947 if (h
->flags
& F_H_FILTER
)
948 return 16; /* filter not supported */
949 h
->mode
= f_read32();
950 h
->mtime
= f_read32();
951 if (h
->version
>= 0x0940)
952 h
->gmtdiff
= f_read32();
959 checksum
= chksum_getresult(&G
.chksum_in
, h
);
960 h
->header_checksum
= f_read32();
961 if (h
->header_checksum
!= checksum
)
966 r
= lzo_get_method(h
);
970 /* check reserved flags */
971 if (h
->flags
& F_RESERVED
)
974 /* skip extra field [not used yet] */
975 if (h
->flags
& F_H_EXTRA_FIELD
) {
978 /* note: the checksum also covers the length */
979 init_chksum(&G
.chksum_in
);
980 h
->extra_field_len
= f_read32();
981 for (k
= 0; k
< h
->extra_field_len
; k
++)
983 checksum
= chksum_getresult(&G
.chksum_in
, h
);
984 h
->extra_field_checksum
= f_read32();
985 if (h
->extra_field_checksum
!= checksum
)
992 static void p_header(header_t
*h
)
999 bb_error_msg_and_die("header_error %d", r
);
1002 /**********************************************************************/
1004 /**********************************************************************/
1005 static void lzo_set_method(header_t
*h
)
1009 if (option_mask32
& OPT_1
) {
1010 h
->method
= M_LZO1X_1_15
;
1011 } else if (option_mask32
& OPT_789
) {
1012 #if ENABLE_LZOP_COMPR_HIGH
1013 h
->method
= M_LZO1X_999
;
1014 if (option_mask32
& OPT_7
)
1016 else if (option_mask32
& OPT_8
)
1021 bb_error_msg_and_die("high compression not compiled in");
1023 } else { /* levels 2..6 or none (defaults to level 3) */
1024 h
->method
= M_LZO1X_1
;
1025 level
= 5; /* levels 2-6 are actually the same */
1031 static smallint
do_lzo_compress(void)
1036 memset(h
, 0, sizeof(*h
));
1040 h
->version
= (LZOP_VERSION
& 0xffff);
1041 h
->version_needed_to_extract
= 0x0940;
1042 h
->lib_version
= lzo_version() & 0xffff;
1044 h
->flags
= (F_OS
& F_OS_MASK
) | (F_CS
& F_CS_MASK
);
1046 if (!(option_mask32
& OPT_F
) || h
->method
== M_LZO1X_999
) {
1047 h
->flags
|= F_ADLER32_D
;
1048 if (option_mask32
& OPT_C
)
1049 h
->flags
|= F_ADLER32_C
;
1052 return lzo_compress(h
);
1056 /**********************************************************************/
1058 /**********************************************************************/
1059 static smallint
do_lzo_decompress(void)
1065 return lzo_decompress(&header
);
1068 static char* FAST_FUNC
make_new_name_lzop(char *filename
, const char *expected_ext UNUSED_PARAM
)
1070 if (option_mask32
& OPT_DECOMPRESS
) {
1071 char *extension
= strrchr(filename
, '.');
1072 if (!extension
|| strcmp(extension
+ 1, "lzo") != 0)
1073 return xasprintf("%s.out", filename
);
1077 return xasprintf("%s.lzo", filename
);
1080 static IF_DESKTOP(long long) int FAST_FUNC
pack_lzop(transformer_aux_data_t
*aux UNUSED_PARAM
)
1082 if (option_mask32
& OPT_DECOMPRESS
)
1083 return do_lzo_decompress();
1084 return do_lzo_compress();
1087 int lzop_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
1088 int lzop_main(int argc UNUSED_PARAM
, char **argv
)
1090 getopt32(argv
, OPTION_STRING
);
1093 if (applet_name
[4] == 'c')
1094 option_mask32
|= (OPT_STDOUT
| OPT_DECOMPRESS
);
1096 if (applet_name
[0] == 'u')
1097 option_mask32
|= OPT_DECOMPRESS
;
1099 global_crc32_table
= crc32_filltable(NULL
, 0);
1100 return bbunpack(argv
, pack_lzop
, make_new_name_lzop
, /*unused:*/ NULL
);