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 "cfvqdt123456789CF"
441 /* Note: must be kept in sync with archival/bbunzip.c */
443 OPT_STDOUT = (1 << 0),
444 OPT_FORCE = (1 << 1),
445 OPT_VERBOSE = (1 << 2),
446 OPT_QUIET = (1 << 3),
447 OPT_DECOMPRESS = (1 << 4),
462 /**********************************************************************/
464 // adapted from free code by Mark Adler <madler@alumni.caltech.edu>
465 // see http://www.zlib.org/
466 /**********************************************************************/
467 static FAST_FUNC uint32_t
468 lzo_adler32(uint32_t adler, const uint8_t* buf, unsigned len)
471 LZO_BASE = 65521, /* largest prime smaller than 65536 */
472 /* NMAX is the largest n such that
473 * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
476 uint32_t s1 = adler & 0xffff;
477 uint32_t s2 = (adler >> 16) & 0xffff;
484 k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
493 return (s2 << 16) | s1;
496 static FAST_FUNC uint32_t
497 lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
499 //if (buf == NULL) - impossible
502 return ~crc32_block_endian0(~c, buf, len, global_crc32_table);
505 /**********************************************************************/
506 static void init_chksum(chksum_t *ct)
508 ct->f_adler32 = ADLER32_INIT_VALUE;
509 ct->f_crc32 = CRC32_INIT_VALUE;
512 static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
514 /* We need to handle the two checksums at once, because at the
515 * beginning of the header, we don't know yet which one we'll
517 ct->f_adler32 = lzo_adler32(ct->f_adler32, (const uint8_t*)buf, cnt);
518 ct->f_crc32 = lzo_crc32(ct->f_crc32, (const uint8_t*)buf, cnt);
521 static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
523 return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
526 /**********************************************************************/
527 static uint32_t read32(void)
534 static void write32(uint32_t v)
540 static void f_write(const void* buf, int cnt)
543 add_bytes_to_chksum(&G.chksum_out, buf, cnt);
546 static void f_read(void* buf, int cnt)
549 add_bytes_to_chksum(&G.chksum_in, buf, cnt);
552 static int f_read8(void)
559 static void f_write8(uint8_t v)
564 static unsigned f_read16(void)
571 static void f_write16(uint16_t v)
577 static uint32_t f_read32(void)
584 static void f_write32(uint32_t v)
590 /**********************************************************************/
591 static int lzo_get_method(header_t *h)
594 if (h->method == M_LZO1X_1) {
597 } else if (h->method == M_LZO1X_1_15) {
600 } else if (h->method == M_LZO1X_999) {
604 return -1; /* not a LZO method */
606 /* check compression level */
607 if (h->level < 1 || h->level > 9)
613 /**********************************************************************/
614 #define LZO_BLOCK_SIZE (256 * 1024l)
615 #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
617 /* LZO may expand uncompressible data by a small amount */
618 #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
620 /**********************************************************************/
622 /**********************************************************************/
623 static NOINLINE smallint lzo_compress(const header_t *h)
625 unsigned block_size = LZO_BLOCK_SIZE;
626 int r = 0; /* LZO_E_OK */
627 uint8_t *const b1 = xzalloc(block_size);
628 uint8_t *const b2 = xzalloc(MAX_COMPRESSED_SIZE(block_size));
629 unsigned src_len = 0, dst_len = 0;
630 uint32_t d_adler32 = ADLER32_INIT_VALUE;
631 uint32_t d_crc32 = CRC32_INIT_VALUE;
634 uint8_t *wrk_mem = NULL;
636 if (h->method == M_LZO1X_1)
637 wrk_mem = xzalloc(LZO1X_1_MEM_COMPRESS);
638 else if (h->method == M_LZO1X_1_15)
639 wrk_mem = xzalloc(LZO1X_1_15_MEM_COMPRESS);
640 else if (h->method == M_LZO1X_999)
641 wrk_mem = xzalloc(LZO1X_999_MEM_COMPRESS);
645 l = full_read(0, b1, block_size);
646 src_len = (l > 0 ? l : 0);
648 /* write uncompressed block size */
651 /* exit if last block */
655 /* compute checksum of uncompressed block */
656 if (h->flags & F_ADLER32_D)
657 d_adler32 = lzo_adler32(ADLER32_INIT_VALUE, b1, src_len);
658 if (h->flags & F_CRC32_D)
659 d_crc32 = lzo_crc32(CRC32_INIT_VALUE, b1, src_len);
662 if (h->method == M_LZO1X_1)
663 r = lzo1x_1_compress(b1, src_len, b2, &dst_len, wrk_mem);
664 else if (h->method == M_LZO1X_1_15)
665 r = lzo1x_1_15_compress(b1, src_len, b2, &dst_len, wrk_mem);
666 #if ENABLE_LZOP_COMPR_HIGH
667 else if (h->method == M_LZO1X_999)
668 r = lzo1x_999_compress_level(b1, src_len, b2, &dst_len,
672 bb_error_msg_and_die("internal error");
674 if (r != 0) /* not LZO_E_OK */
675 bb_error_msg_and_die("internal error - compression failed");
677 /* write compressed block size */
678 if (dst_len < src_len) {
680 if (h->method == M_LZO1X_999) {
681 unsigned new_len = src_len;
682 r = lzo1x_optimize(b2, dst_len, b1, &new_len, NULL);
683 if (r != 0 /*LZO_E_OK*/ || new_len != src_len)
684 bb_error_msg_and_die("internal error - optimization failed");
688 /* data actually expanded => store data uncompressed */
692 /* write checksum of uncompressed block */
693 if (h->flags & F_ADLER32_D)
695 if (h->flags & F_CRC32_D)
698 if (dst_len < src_len) {
699 /* write checksum of compressed block */
700 if (h->flags & F_ADLER32_C)
701 write32(lzo_adler32(ADLER32_INIT_VALUE, b2, dst_len));
702 if (h->flags & F_CRC32_C)
703 write32(lzo_crc32(CRC32_INIT_VALUE, b2, dst_len));
704 /* write compressed block data */
705 xwrite(1, b2, dst_len);
707 /* write uncompressed block data */
708 xwrite(1, b1, src_len);
718 static FAST_FUNC void lzo_check(
720 uint8_t* buf, unsigned len,
721 uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
724 /* This function, by having the same order of parameters
725 * as fn, and by being marked FAST_FUNC (same as fn),
726 * saves a dozen bytes of code.
728 uint32_t c = fn(init, buf, len);
730 bb_error_msg_and_die("checksum error");
733 /**********************************************************************/
735 /**********************************************************************/
736 static NOINLINE smallint lzo_decompress(const header_t *h)
738 unsigned block_size = LZO_BLOCK_SIZE;
740 uint32_t src_len, dst_len;
741 uint32_t c_adler32 = ADLER32_INIT_VALUE;
742 uint32_t d_adler32 = ADLER32_INIT_VALUE;
743 uint32_t c_crc32 = CRC32_INIT_VALUE, d_crc32 = CRC32_INIT_VALUE;
746 uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
752 /* read uncompressed block size */
755 /* exit if last block */
759 /* error if split file */
760 if (dst_len == 0xffffffffL)
761 /* should not happen - not yet implemented */
762 bb_error_msg_and_die("this file is a split lzop file");
764 if (dst_len > MAX_BLOCK_SIZE)
765 bb_error_msg_and_die("corrupted data");
767 /* read compressed block size */
769 if (src_len <= 0 || src_len > dst_len)
770 bb_error_msg_and_die("corrupted data");
772 if (dst_len > block_size) {
777 block_size = dst_len;
778 mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
781 /* read checksum of uncompressed block */
782 if (h->flags & F_ADLER32_D)
783 d_adler32 = read32();
784 if (h->flags & F_CRC32_D)
787 /* read checksum of compressed block */
788 if (src_len < dst_len) {
789 if (h->flags & F_ADLER32_C)
790 c_adler32 = read32();
791 if (h->flags & F_CRC32_C)
796 b2 = xzalloc(mcs_block_size);
797 /* read the block into the end of our buffer */
798 b1 = b2 + mcs_block_size - src_len;
799 xread(0, b1, src_len);
801 if (src_len < dst_len) {
802 unsigned d = dst_len;
804 if (!(option_mask32 & OPT_F)) {
805 /* verify checksum of compressed block */
806 if (h->flags & F_ADLER32_C)
807 lzo_check(ADLER32_INIT_VALUE,
809 lzo_adler32, c_adler32);
810 if (h->flags & F_CRC32_C)
811 lzo_check(CRC32_INIT_VALUE,
817 // if (option_mask32 & OPT_F)
818 // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
820 r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
822 if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
823 bb_error_msg_and_die("corrupted data");
827 /* "stored" block => no decompression */
831 if (!(option_mask32 & OPT_F)) {
832 /* verify checksum of uncompressed block */
833 if (h->flags & F_ADLER32_D)
834 lzo_check(ADLER32_INIT_VALUE,
836 lzo_adler32, d_adler32);
837 if (h->flags & F_CRC32_D)
838 lzo_check(CRC32_INIT_VALUE,
843 /* write uncompressed block data */
844 xwrite(1, dst, dst_len);
851 /**********************************************************************/
852 // lzop file signature (shamelessly borrowed from PNG)
853 /**********************************************************************/
855 * The first nine bytes of a lzop file always contain the following values:
858 * --- --- --- --- --- --- --- --- ---
859 * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
860 * (decimal) 137 76 90 79 0 13 10 26 10
861 * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
864 /* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
865 * Only slight differences in header:
866 * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
867 * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
869 * version lib_version
870 * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
871 * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
872 * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
874 * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
875 * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
878 * The rest is identical.
880 static const unsigned char lzop_magic[9] = {
881 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
884 /* This coding is derived from Alexander Lehmann's pngcheck code. */
885 static void check_magic(void)
887 unsigned char magic[sizeof(lzop_magic)];
888 xread(0, magic, sizeof(magic));
889 if (memcmp(magic, lzop_magic, sizeof(lzop_magic)) != 0)
890 bb_error_msg_and_die("bad magic number");
893 /**********************************************************************/
895 /**********************************************************************/
896 static void write_header(const header_t *h)
900 xwrite(1, lzop_magic, sizeof(lzop_magic));
902 init_chksum(&G.chksum_out);
904 f_write16(h->version);
905 f_write16(h->lib_version);
906 f_write16(h->version_needed_to_extract);
912 f_write32(h->gmtdiff);
914 l = (int) strlen(h->name);
919 f_write32(chksum_getresult(&G.chksum_out, h));
922 static int read_header(header_t *h)
928 memset(h, 0, sizeof(*h));
929 h->version_needed_to_extract = 0x0900; /* first lzop version */
932 init_chksum(&G.chksum_in);
934 h->version = f_read16();
935 if (h->version < 0x0900)
937 h->lib_version = f_read16();
938 if (h->version >= 0x0940) {
939 h->version_needed_to_extract = f_read16();
940 if (h->version_needed_to_extract > LZOP_VERSION)
942 if (h->version_needed_to_extract < 0x0900)
945 h->method = f_read8();
946 if (h->version >= 0x0940)
947 h->level = f_read8();
948 h->flags = f_read32();
949 if (h->flags & F_H_FILTER)
950 return 16; /* filter not supported */
951 h->mode = f_read32();
952 h->mtime = f_read32();
953 if (h->version >= 0x0940)
954 h->gmtdiff = f_read32();
961 checksum = chksum_getresult(&G.chksum_in, h);
962 h->header_checksum = f_read32();
963 if (h->header_checksum != checksum)
968 r = lzo_get_method(h);
972 /* check reserved flags */
973 if (h->flags & F_RESERVED)
976 /* skip extra field [not used yet] */
977 if (h->flags & F_H_EXTRA_FIELD) {
980 /* note: the checksum also covers the length */
981 init_chksum(&G.chksum_in);
982 h->extra_field_len = f_read32();
983 for (k = 0; k < h->extra_field_len; k++)
985 checksum = chksum_getresult(&G.chksum_in, h);
986 h->extra_field_checksum = f_read32();
987 if (h->extra_field_checksum != checksum)
994 static void p_header(header_t *h)
1001 bb_error_msg_and_die("header_error %d", r);
1004 /**********************************************************************/
1006 /**********************************************************************/
1007 static void lzo_set_method(header_t *h)
1011 if (option_mask32 & OPT_1) {
1012 h->method = M_LZO1X_1_15;
1013 } else if (option_mask32 & OPT_789) {
1014 #if ENABLE_LZOP_COMPR_HIGH
1015 h->method = M_LZO1X_999;
1016 if (option_mask32 & OPT_7)
1018 else if (option_mask32 & OPT_8)
1023 bb_error_msg_and_die("high compression not compiled in");
1025 } else { /* levels 2..6 or none (defaults to level 3) */
1026 h->method = M_LZO1X_1;
1027 level = 5; /* levels 2-6 are actually the same */
1033 static smallint do_lzo_compress(void)
1038 memset(h, 0, sizeof(*h));
1042 h->version = (LZOP_VERSION & 0xffff);
1043 h->version_needed_to_extract = 0x0940;
1044 h->lib_version = lzo_version() & 0xffff;
1046 h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
1048 if (!(option_mask32 & OPT_F) || h->method == M_LZO1X_999) {
1049 h->flags |= F_ADLER32_D;
1050 if (option_mask32 & OPT_C)
1051 h->flags |= F_ADLER32_C;
1054 return lzo_compress(h);
1058 /**********************************************************************/
1060 /**********************************************************************/
1061 static smallint do_lzo_decompress(void)
1067 return lzo_decompress(&header);
1070 static char* FAST_FUNC make_new_name_lzop(char *filename, const char *expected_ext UNUSED_PARAM)
1072 if (option_mask32 & OPT_DECOMPRESS) {
1073 char *extension = strrchr(filename, '.');
1074 if (!extension || strcmp(extension + 1, "lzo") != 0)
1075 return xasprintf("%s.out", filename);
1079 return xasprintf("%s.lzo", filename);
1082 static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(transformer_aux_data_t *aux UNUSED_PARAM)
1084 if (option_mask32 & OPT_DECOMPRESS)
1085 return do_lzo_decompress();
1086 return do_lzo_compress();
1089 int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1090 int lzop_main(int argc UNUSED_PARAM, char **argv)
1092 getopt32(argv, OPTION_STRING);
1095 if (applet_name[4] == 'c')
1096 option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
1098 if (applet_name[4] == 'o')
1099 option_mask32 |= OPT_DECOMPRESS;
1101 global_crc32_table = crc32_filltable(NULL, 0);
1102 return bbunpack(argv, pack_lzop, make_new_name_lzop, /*unused:*/ NULL);