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"
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);
214 *op++ = *m_pos++; *op++ = *m_pos++;
215 goto copy_literal_run;
222 if (t >= 64) { /* a M2 match */
225 m_pos -= (t >> 2) & 7;
229 m_pos -= (t >> 2) & 3;
237 /* test if in beetween two long literal runs */
238 if (t == 1 && lit > 3 && nl == 0
239 && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
242 /* copy over the 3 literals that replace the match */
243 copy3(ip-1-2,m_pos,pd(op,m_pos));
244 /* set new length of previous literal run */
246 *litp = (unsigned char)(lit - 3);
251 goto copy_literal_run;
254 if (t >= 32) { /* a M3 match */
265 } else { /* a M4 match */
267 m_pos -= (t & 8) << 11;
285 /* test if in beetween two matches */
286 if (t == 1 && lit == 0 && nl == 0 && ip[0] >= 16) {
288 /* make a previous short run */
290 *litp = (unsigned char)((*litp & ~3) | lit);
291 /* copy over the 3 literals that replace the match */
292 copy3(ip-3,m_pos,pd(op,m_pos));
295 /* test if a literal run follows */
296 else if (t == 1 && lit <= 3 && nl == 0
297 && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
300 /* remove short run */
302 /* copy over the 3 literals that replace the match */
303 copy3(ip-4+1,m_pos,pd(op,m_pos));
304 /* move literals 1 byte ahead */
307 memmove(litp+1,litp,lit);
308 /* insert new length of long literal run */
310 *litp = (unsigned char)(lit - 3);
316 goto copy_literal_run;
322 do *op++ = *m_pos++; while (--t > 0);
326 if (next_lit == NO_LIT) {
338 do *op++ = *ip++; while (--t > 0);
340 } while (TEST_IP && TEST_OP);
343 /* no EOF code was found */
344 *out_len = pd(op, out);
345 return LZO_E_EOF_NOT_FOUND;
348 // LZO_UNUSED(o_m1_a); LZO_UNUSED(o_m1_b); LZO_UNUSED(o_m2);
349 // LZO_UNUSED(o_m3_a); LZO_UNUSED(o_m3_b);
350 *out_len = pd(op, out);
351 return (ip == ip_end ? LZO_E_OK :
352 (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
355 /**********************************************************************/
356 #define F_OS F_OS_UNIX
357 #define F_CS F_CS_NATIVE
359 /**********************************************************************/
360 #define ADLER32_INIT_VALUE 1
361 #define CRC32_INIT_VALUE 0
363 /**********************************************************************/
370 /**********************************************************************/
372 #define F_ADLER32_D 0x00000001L
373 #define F_ADLER32_C 0x00000002L
374 #define F_H_EXTRA_FIELD 0x00000040L
375 #define F_H_GMTDIFF 0x00000080L
376 #define F_CRC32_D 0x00000100L
377 #define F_CRC32_C 0x00000200L
378 #define F_H_FILTER 0x00000800L
379 #define F_H_CRC32 0x00001000L
380 #define F_MASK 0x00003FFFL
382 /* operating system & file system that created the file [mostly unused] */
383 #define F_OS_UNIX 0x03000000L
384 #define F_OS_SHIFT 24
385 #define F_OS_MASK 0xff000000L
387 /* character set for file name encoding [mostly unused] */
388 #define F_CS_NATIVE 0x00000000L
389 #define F_CS_SHIFT 20
390 #define F_CS_MASK 0x00f00000L
392 /* these bits must be zero */
393 #define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
395 typedef struct chksum_t {
400 typedef struct header_t {
402 unsigned lib_version;
403 unsigned version_needed_to_extract;
408 uint32_t header_checksum;
410 uint32_t extra_field_len;
411 uint32_t extra_field_checksum;
413 unsigned char method;
421 /*const uint32_t *lzo_crc32_table;*/
425 #define G (*(struct globals*)&bb_common_bufsiz1)
426 #define INIT_G() do { } while (0)
427 //#define G (*ptr_to_globals)
428 //#define INIT_G() do {
429 // SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
433 /**********************************************************************/
434 #define LZOP_VERSION 0x1010
435 //#define LZOP_VERSION_STRING "1.01"
436 //#define LZOP_VERSION_DATE "Apr 27th 2003"
438 #define OPTION_STRING "cfvdt123456789CF"
441 OPT_STDOUT = (1 << 0),
442 OPT_FORCE = (1 << 1),
443 OPT_VERBOSE = (1 << 2),
444 OPT_DECOMPRESS = (1 << 3),
459 /**********************************************************************/
461 // adapted from free code by Mark Adler <madler@alumni.caltech.edu>
462 // see http://www.zlib.org/
463 /**********************************************************************/
464 static FAST_FUNC uint32_t
465 lzo_adler32(uint32_t adler, const uint8_t* buf, unsigned len)
468 LZO_BASE = 65521, /* largest prime smaller than 65536 */
469 /* NMAX is the largest n such that
470 * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
473 uint32_t s1 = adler & 0xffff;
474 uint32_t s2 = (adler >> 16) & 0xffff;
481 k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
490 return (s2 << 16) | s1;
493 static FAST_FUNC uint32_t
494 lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
496 //if (buf == NULL) - impossible
499 return ~crc32_block_endian0(~c, buf, len, global_crc32_table);
502 /**********************************************************************/
503 static void init_chksum(chksum_t *ct)
505 ct->f_adler32 = ADLER32_INIT_VALUE;
506 ct->f_crc32 = CRC32_INIT_VALUE;
509 static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
511 /* We need to handle the two checksums at once, because at the
512 * beginning of the header, we don't know yet which one we'll
514 ct->f_adler32 = lzo_adler32(ct->f_adler32, (const uint8_t*)buf, cnt);
515 ct->f_crc32 = lzo_crc32(ct->f_crc32, (const uint8_t*)buf, cnt);
518 static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
520 return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
523 /**********************************************************************/
524 static uint32_t read32(void)
531 static void write32(uint32_t v)
537 static void f_write(const void* buf, int cnt)
540 add_bytes_to_chksum(&G.chksum_out, buf, cnt);
543 static void f_read(void* buf, int cnt)
546 add_bytes_to_chksum(&G.chksum_in, buf, cnt);
549 static int f_read8(void)
556 static void f_write8(uint8_t v)
561 static unsigned f_read16(void)
568 static void f_write16(uint16_t v)
574 static uint32_t f_read32(void)
581 static void f_write32(uint32_t v)
587 /**********************************************************************/
588 static int lzo_get_method(header_t *h)
591 if (h->method == M_LZO1X_1) {
594 } else if (h->method == M_LZO1X_1_15) {
597 } else if (h->method == M_LZO1X_999) {
601 return -1; /* not a LZO method */
603 /* check compression level */
604 if (h->level < 1 || h->level > 9)
610 /**********************************************************************/
611 #define LZO_BLOCK_SIZE (256 * 1024l)
612 #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
614 /* LZO may expand uncompressible data by a small amount */
615 #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
617 /**********************************************************************/
619 /**********************************************************************/
620 static NOINLINE smallint lzo_compress(const header_t *h)
622 unsigned block_size = LZO_BLOCK_SIZE;
623 int r = 0; /* LZO_E_OK */
624 uint8_t *const b1 = xzalloc(block_size);
625 uint8_t *const b2 = xzalloc(MAX_COMPRESSED_SIZE(block_size));
626 unsigned src_len = 0, dst_len = 0;
627 uint32_t d_adler32 = ADLER32_INIT_VALUE;
628 uint32_t d_crc32 = CRC32_INIT_VALUE;
631 uint8_t *wrk_mem = NULL;
633 if (h->method == M_LZO1X_1)
634 wrk_mem = xzalloc(LZO1X_1_MEM_COMPRESS);
635 else if (h->method == M_LZO1X_1_15)
636 wrk_mem = xzalloc(LZO1X_1_15_MEM_COMPRESS);
637 else if (h->method == M_LZO1X_999)
638 wrk_mem = xzalloc(LZO1X_999_MEM_COMPRESS);
642 l = full_read(0, b1, block_size);
643 src_len = (l > 0 ? l : 0);
645 /* write uncompressed block size */
648 /* exit if last block */
652 /* compute checksum of uncompressed block */
653 if (h->flags & F_ADLER32_D)
654 d_adler32 = lzo_adler32(ADLER32_INIT_VALUE, b1, src_len);
655 if (h->flags & F_CRC32_D)
656 d_crc32 = lzo_crc32(CRC32_INIT_VALUE, b1, src_len);
659 if (h->method == M_LZO1X_1)
660 r = lzo1x_1_compress(b1, src_len, b2, &dst_len, wrk_mem);
661 else if (h->method == M_LZO1X_1_15)
662 r = lzo1x_1_15_compress(b1, src_len, b2, &dst_len, wrk_mem);
663 #if ENABLE_LZOP_COMPR_HIGH
664 else if (h->method == M_LZO1X_999)
665 r = lzo1x_999_compress_level(b1, src_len, b2, &dst_len,
669 bb_error_msg_and_die("internal error");
671 if (r != 0) /* not LZO_E_OK */
672 bb_error_msg_and_die("internal error - compression failed");
674 /* write compressed block size */
675 if (dst_len < src_len) {
677 if (h->method == M_LZO1X_999) {
678 unsigned new_len = src_len;
679 r = lzo1x_optimize(b2, dst_len, b1, &new_len, NULL);
680 if (r != 0 /*LZO_E_OK*/ || new_len != src_len)
681 bb_error_msg_and_die("internal error - optimization failed");
685 /* data actually expanded => store data uncompressed */
689 /* write checksum of uncompressed block */
690 if (h->flags & F_ADLER32_D)
692 if (h->flags & F_CRC32_D)
695 if (dst_len < src_len) {
696 /* write checksum of compressed block */
697 if (h->flags & F_ADLER32_C)
698 write32(lzo_adler32(ADLER32_INIT_VALUE, b2, dst_len));
699 if (h->flags & F_CRC32_C)
700 write32(lzo_crc32(CRC32_INIT_VALUE, b2, dst_len));
701 /* write compressed block data */
702 xwrite(1, b2, dst_len);
704 /* write uncompressed block data */
705 xwrite(1, b1, src_len);
715 static FAST_FUNC void lzo_check(
717 uint8_t* buf, unsigned len,
718 uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
721 /* This function, by having the same order of parameters
722 * as fn, and by being marked FAST_FUNC (same as fn),
723 * saves a dozen bytes of code.
725 uint32_t c = fn(init, buf, len);
727 bb_error_msg_and_die("checksum error");
730 /**********************************************************************/
732 /**********************************************************************/
733 static NOINLINE smallint lzo_decompress(const header_t *h)
735 unsigned block_size = LZO_BLOCK_SIZE;
737 uint32_t src_len, dst_len;
738 uint32_t c_adler32 = ADLER32_INIT_VALUE;
739 uint32_t d_adler32 = ADLER32_INIT_VALUE;
740 uint32_t c_crc32 = CRC32_INIT_VALUE, d_crc32 = CRC32_INIT_VALUE;
743 uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
749 /* read uncompressed block size */
752 /* exit if last block */
756 /* error if split file */
757 if (dst_len == 0xffffffffL)
758 /* should not happen - not yet implemented */
759 bb_error_msg_and_die("this file is a split lzop file");
761 if (dst_len > MAX_BLOCK_SIZE)
762 bb_error_msg_and_die("corrupted data");
764 /* read compressed block size */
766 if (src_len <= 0 || src_len > dst_len)
767 bb_error_msg_and_die("corrupted data");
769 if (dst_len > block_size) {
774 block_size = dst_len;
775 mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
778 /* read checksum of uncompressed block */
779 if (h->flags & F_ADLER32_D)
780 d_adler32 = read32();
781 if (h->flags & F_CRC32_D)
784 /* read checksum of compressed block */
785 if (src_len < dst_len) {
786 if (h->flags & F_ADLER32_C)
787 c_adler32 = read32();
788 if (h->flags & F_CRC32_C)
793 b2 = xzalloc(mcs_block_size);
794 /* read the block into the end of our buffer */
795 b1 = b2 + mcs_block_size - src_len;
796 xread(0, b1, src_len);
798 if (src_len < dst_len) {
799 unsigned d = dst_len;
801 if (!(option_mask32 & OPT_F)) {
802 /* verify checksum of compressed block */
803 if (h->flags & F_ADLER32_C)
804 lzo_check(ADLER32_INIT_VALUE,
806 lzo_adler32, c_adler32);
807 if (h->flags & F_CRC32_C)
808 lzo_check(CRC32_INIT_VALUE,
814 // if (option_mask32 & OPT_F)
815 // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
817 r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
819 if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
820 bb_error_msg_and_die("corrupted data");
824 /* "stored" block => no decompression */
828 if (!(option_mask32 & OPT_F)) {
829 /* verify checksum of uncompressed block */
830 if (h->flags & F_ADLER32_D)
831 lzo_check(ADLER32_INIT_VALUE,
833 lzo_adler32, d_adler32);
834 if (h->flags & F_CRC32_D)
835 lzo_check(CRC32_INIT_VALUE,
840 /* write uncompressed block data */
841 xwrite(1, dst, dst_len);
848 /**********************************************************************/
849 // lzop file signature (shamelessly borrowed from PNG)
850 /**********************************************************************/
852 * The first nine bytes of a lzop file always contain the following values:
855 * --- --- --- --- --- --- --- --- ---
856 * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
857 * (decimal) 137 76 90 79 0 13 10 26 10
858 * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
861 /* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
862 * Only slight differences in header:
863 * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
864 * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
866 * version lib_version
867 * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
868 * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
869 * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
871 * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
872 * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
875 * The rest is identical.
877 static const unsigned char lzop_magic[9] = {
878 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
881 /* This coding is derived from Alexander Lehmann's pngcheck code. */
882 static void check_magic(void)
884 unsigned char magic[sizeof(lzop_magic)];
885 xread(0, magic, sizeof(magic));
886 if (memcmp(magic, lzop_magic, sizeof(lzop_magic)) != 0)
887 bb_error_msg_and_die("bad magic number");
890 /**********************************************************************/
892 /**********************************************************************/
893 static void write_header(const header_t *h)
897 xwrite(1, lzop_magic, sizeof(lzop_magic));
899 init_chksum(&G.chksum_out);
901 f_write16(h->version);
902 f_write16(h->lib_version);
903 f_write16(h->version_needed_to_extract);
909 f_write32(h->gmtdiff);
911 l = (int) strlen(h->name);
916 f_write32(chksum_getresult(&G.chksum_out, h));
919 static int read_header(header_t *h)
925 memset(h, 0, sizeof(*h));
926 h->version_needed_to_extract = 0x0900; /* first lzop version */
929 init_chksum(&G.chksum_in);
931 h->version = f_read16();
932 if (h->version < 0x0900)
934 h->lib_version = f_read16();
935 if (h->version >= 0x0940) {
936 h->version_needed_to_extract = f_read16();
937 if (h->version_needed_to_extract > LZOP_VERSION)
939 if (h->version_needed_to_extract < 0x0900)
942 h->method = f_read8();
943 if (h->version >= 0x0940)
944 h->level = f_read8();
945 h->flags = f_read32();
946 if (h->flags & F_H_FILTER)
947 return 16; /* filter not supported */
948 h->mode = f_read32();
949 h->mtime = f_read32();
950 if (h->version >= 0x0940)
951 h->gmtdiff = f_read32();
958 checksum = chksum_getresult(&G.chksum_in, h);
959 h->header_checksum = f_read32();
960 if (h->header_checksum != checksum)
965 r = lzo_get_method(h);
969 /* check reserved flags */
970 if (h->flags & F_RESERVED)
973 /* skip extra field [not used yet] */
974 if (h->flags & F_H_EXTRA_FIELD) {
977 /* note: the checksum also covers the length */
978 init_chksum(&G.chksum_in);
979 h->extra_field_len = f_read32();
980 for (k = 0; k < h->extra_field_len; k++)
982 checksum = chksum_getresult(&G.chksum_in, h);
983 h->extra_field_checksum = f_read32();
984 if (h->extra_field_checksum != checksum)
991 static void p_header(header_t *h)
998 bb_error_msg_and_die("header_error %d", r);
1001 /**********************************************************************/
1003 /**********************************************************************/
1004 static void lzo_set_method(header_t *h)
1008 if (option_mask32 & OPT_1) {
1009 h->method = M_LZO1X_1_15;
1010 } else if (option_mask32 & OPT_789) {
1011 #if ENABLE_LZOP_COMPR_HIGH
1012 h->method = M_LZO1X_999;
1013 if (option_mask32 & OPT_7)
1015 else if (option_mask32 & OPT_8)
1020 bb_error_msg_and_die("high compression not compiled in");
1022 } else { /* levels 2..6 or none (defaults to level 3) */
1023 h->method = M_LZO1X_1;
1024 level = 5; /* levels 2-6 are actually the same */
1030 static smallint do_lzo_compress(void)
1035 memset(h, 0, sizeof(*h));
1039 h->version = (LZOP_VERSION & 0xffff);
1040 h->version_needed_to_extract = 0x0940;
1041 h->lib_version = lzo_version() & 0xffff;
1043 h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
1045 if (!(option_mask32 & OPT_F) || h->method == M_LZO1X_999) {
1046 h->flags |= F_ADLER32_D;
1047 if (option_mask32 & OPT_C)
1048 h->flags |= F_ADLER32_C;
1051 return lzo_compress(h);
1055 /**********************************************************************/
1057 /**********************************************************************/
1058 static smallint do_lzo_decompress(void)
1064 return lzo_decompress(&header);
1067 static char* FAST_FUNC make_new_name_lzop(char *filename, const char *expected_ext UNUSED_PARAM)
1069 if (option_mask32 & OPT_DECOMPRESS) {
1070 char *extension = strrchr(filename, '.');
1071 if (!extension || strcmp(extension + 1, "lzo") != 0)
1072 return xasprintf("%s.out", filename);
1076 return xasprintf("%s.lzo", filename);
1079 static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(unpack_info_t *info UNUSED_PARAM)
1081 if (option_mask32 & OPT_DECOMPRESS)
1082 return do_lzo_decompress();
1083 return do_lzo_compress();
1086 int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1087 int lzop_main(int argc UNUSED_PARAM, char **argv)
1089 getopt32(argv, OPTION_STRING);
1092 if (applet_name[4] == 'c')
1093 option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
1095 if (applet_name[0] == 'u')
1096 option_mask32 |= OPT_DECOMPRESS;
1098 global_crc32_table = crc32_filltable(NULL, 0);
1099 return bbunpack(argv, pack_lzop, make_new_name_lzop, /*unused:*/ NULL);