1 | /*
|
---|
2 | This file is part of the lzop file compressor.
|
---|
3 |
|
---|
4 | Copyright (C) 1996..2003 Markus Franz Xaver Johannes Oberhumer
|
---|
5 | All Rights Reserved.
|
---|
6 |
|
---|
7 | Markus F.X.J. Oberhumer <markus@oberhumer.com>
|
---|
8 | http://www.oberhumer.com/opensource/lzop/
|
---|
9 |
|
---|
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.
|
---|
14 |
|
---|
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.
|
---|
19 |
|
---|
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.
|
---|
24 |
|
---|
25 | "Minimalized" for busybox by Alain Knaff
|
---|
26 | */
|
---|
27 |
|
---|
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"
|
---|
38 | //usage:
|
---|
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"
|
---|
44 | //usage:
|
---|
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"
|
---|
52 |
|
---|
53 | #include "libbb.h"
|
---|
54 | #include "bb_archive.h"
|
---|
55 | #include "liblzo_interface.h"
|
---|
56 |
|
---|
57 | /* lzo-2.03/src/lzo_ptr.h */
|
---|
58 | #define pd(a,b) ((unsigned)((a)-(b)))
|
---|
59 |
|
---|
60 | #define lzo_version() LZO_VERSION
|
---|
61 | #define lzo_sizeof_dict_t (sizeof(uint8_t*))
|
---|
62 |
|
---|
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))
|
---|
67 |
|
---|
68 | /* lzo-2.03/src/lzo1x_oo.c */
|
---|
69 | #define NO_LIT UINT_MAX
|
---|
70 |
|
---|
71 | /**********************************************************************/
|
---|
72 | static void copy2(uint8_t* ip, const uint8_t* m_pos, unsigned off)
|
---|
73 | {
|
---|
74 | ip[0] = m_pos[0];
|
---|
75 | if (off == 1)
|
---|
76 | ip[1] = m_pos[0];
|
---|
77 | else
|
---|
78 | ip[1] = m_pos[1];
|
---|
79 | }
|
---|
80 |
|
---|
81 | static void copy3(uint8_t* ip, const uint8_t* m_pos, unsigned off)
|
---|
82 | {
|
---|
83 | ip[0] = m_pos[0];
|
---|
84 | if (off == 1) {
|
---|
85 | ip[2] = ip[1] = m_pos[0];
|
---|
86 | }
|
---|
87 | else if (off == 2) {
|
---|
88 | ip[1] = m_pos[1];
|
---|
89 | ip[2] = m_pos[0];
|
---|
90 | }
|
---|
91 | else {
|
---|
92 | ip[1] = m_pos[1];
|
---|
93 | ip[2] = m_pos[2];
|
---|
94 | }
|
---|
95 | }
|
---|
96 |
|
---|
97 | /**********************************************************************/
|
---|
98 | // optimize a block of data.
|
---|
99 | /**********************************************************************/
|
---|
100 | #define TEST_IP (ip < ip_end)
|
---|
101 | #define TEST_OP (op <= op_end)
|
---|
102 |
|
---|
103 | static NOINLINE int lzo1x_optimize(uint8_t *in, unsigned in_len,
|
---|
104 | uint8_t *out, unsigned *out_len,
|
---|
105 | void* wrkmem UNUSED_PARAM)
|
---|
106 | {
|
---|
107 | uint8_t* op;
|
---|
108 | uint8_t* ip;
|
---|
109 | unsigned t;
|
---|
110 | uint8_t* m_pos;
|
---|
111 | uint8_t* const ip_end = in + in_len;
|
---|
112 | uint8_t* const op_end = out + *out_len;
|
---|
113 | uint8_t* litp = NULL;
|
---|
114 | unsigned lit = 0;
|
---|
115 | unsigned next_lit = NO_LIT;
|
---|
116 | unsigned nl;
|
---|
117 | unsigned long o_m1_a = 0, o_m1_b = 0, o_m2 = 0, o_m3_a = 0, o_m3_b = 0;
|
---|
118 |
|
---|
119 | // LZO_UNUSED(wrkmem);
|
---|
120 |
|
---|
121 | *out_len = 0;
|
---|
122 |
|
---|
123 | op = out;
|
---|
124 | ip = in;
|
---|
125 |
|
---|
126 | if (*ip > 17) {
|
---|
127 | t = *ip++ - 17;
|
---|
128 | if (t < 4)
|
---|
129 | goto match_next;
|
---|
130 | goto first_literal_run;
|
---|
131 | }
|
---|
132 |
|
---|
133 | while (TEST_IP && TEST_OP) {
|
---|
134 | t = *ip++;
|
---|
135 | if (t >= 16)
|
---|
136 | goto match;
|
---|
137 | /* a literal run */
|
---|
138 | litp = ip - 1;
|
---|
139 | if (t == 0) {
|
---|
140 | t = 15;
|
---|
141 | while (*ip == 0)
|
---|
142 | t += 255, ip++;
|
---|
143 | t += *ip++;
|
---|
144 | }
|
---|
145 | lit = t + 3;
|
---|
146 | /* copy literals */
|
---|
147 | copy_literal_run:
|
---|
148 | *op++ = *ip++;
|
---|
149 | *op++ = *ip++;
|
---|
150 | *op++ = *ip++;
|
---|
151 | first_literal_run:
|
---|
152 | do *op++ = *ip++; while (--t > 0);
|
---|
153 |
|
---|
154 | t = *ip++;
|
---|
155 |
|
---|
156 | if (t >= 16)
|
---|
157 | goto match;
|
---|
158 | #if defined(LZO1X)
|
---|
159 | m_pos = op - 1 - 0x800;
|
---|
160 | #elif defined(LZO1Y)
|
---|
161 | m_pos = op - 1 - 0x400;
|
---|
162 | #endif
|
---|
163 | m_pos -= t >> 2;
|
---|
164 | m_pos -= *ip++ << 2;
|
---|
165 | *op++ = *m_pos++;
|
---|
166 | *op++ = *m_pos++;
|
---|
167 | *op++ = *m_pos++;
|
---|
168 | lit = 0;
|
---|
169 | goto match_done;
|
---|
170 |
|
---|
171 |
|
---|
172 | /* handle matches */
|
---|
173 | do {
|
---|
174 | if (t < 16) { /* a M1 match */
|
---|
175 | m_pos = op - 1;
|
---|
176 | m_pos -= t >> 2;
|
---|
177 | m_pos -= *ip++ << 2;
|
---|
178 |
|
---|
179 | if (litp == NULL)
|
---|
180 | goto copy_m1;
|
---|
181 |
|
---|
182 | nl = ip[-2] & 3;
|
---|
183 | /* test if a match follows */
|
---|
184 | if (nl == 0 && lit == 1 && ip[0] >= 16) {
|
---|
185 | next_lit = nl;
|
---|
186 | /* adjust length of previous short run */
|
---|
187 | lit += 2;
|
---|
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));
|
---|
191 | o_m1_a++;
|
---|
192 | }
|
---|
193 | /* test if a literal run follows */
|
---|
194 | else
|
---|
195 | if (nl == 0
|
---|
196 | && ip[0] < 16
|
---|
197 | && ip[0] != 0
|
---|
198 | && (lit + 2 + ip[0] < 16)
|
---|
199 | ) {
|
---|
200 | t = *ip++;
|
---|
201 | /* remove short run */
|
---|
202 | *litp &= ~3;
|
---|
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 */
|
---|
206 | litp += 2;
|
---|
207 | if (lit > 0)
|
---|
208 | memmove(litp+1, litp, lit);
|
---|
209 | /* insert new length of long literal run */
|
---|
210 | lit += 2 + t + 3;
|
---|
211 | *litp = (unsigned char)(lit - 3);
|
---|
212 |
|
---|
213 | o_m1_b++;
|
---|
214 | *op++ = *m_pos++;
|
---|
215 | *op++ = *m_pos++;
|
---|
216 | goto copy_literal_run;
|
---|
217 | }
|
---|
218 | copy_m1:
|
---|
219 | *op++ = *m_pos++;
|
---|
220 | *op++ = *m_pos++;
|
---|
221 | } else {
|
---|
222 | match:
|
---|
223 | if (t >= 64) { /* a M2 match */
|
---|
224 | m_pos = op - 1;
|
---|
225 | #if defined(LZO1X)
|
---|
226 | m_pos -= (t >> 2) & 7;
|
---|
227 | m_pos -= *ip++ << 3;
|
---|
228 | t = (t >> 5) - 1;
|
---|
229 | #elif defined(LZO1Y)
|
---|
230 | m_pos -= (t >> 2) & 3;
|
---|
231 | m_pos -= *ip++ << 2;
|
---|
232 | t = (t >> 4) - 3;
|
---|
233 | #endif
|
---|
234 | if (litp == NULL)
|
---|
235 | goto copy_m;
|
---|
236 |
|
---|
237 | nl = ip[-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)
|
---|
241 | ) {
|
---|
242 | t = *ip++;
|
---|
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 */
|
---|
246 | lit += 3 + t + 3;
|
---|
247 | *litp = (unsigned char)(lit - 3);
|
---|
248 | o_m2++;
|
---|
249 | *op++ = *m_pos++;
|
---|
250 | *op++ = *m_pos++;
|
---|
251 | *op++ = *m_pos++;
|
---|
252 | goto copy_literal_run;
|
---|
253 | }
|
---|
254 | } else {
|
---|
255 | if (t >= 32) { /* a M3 match */
|
---|
256 | t &= 31;
|
---|
257 | if (t == 0) {
|
---|
258 | t = 31;
|
---|
259 | while (*ip == 0)
|
---|
260 | t += 255, ip++;
|
---|
261 | t += *ip++;
|
---|
262 | }
|
---|
263 | m_pos = op - 1;
|
---|
264 | m_pos -= *ip++ >> 2;
|
---|
265 | m_pos -= *ip++ << 6;
|
---|
266 | } else { /* a M4 match */
|
---|
267 | m_pos = op;
|
---|
268 | m_pos -= (t & 8) << 11;
|
---|
269 | t &= 7;
|
---|
270 | if (t == 0) {
|
---|
271 | t = 7;
|
---|
272 | while (*ip == 0)
|
---|
273 | t += 255, ip++;
|
---|
274 | t += *ip++;
|
---|
275 | }
|
---|
276 | m_pos -= *ip++ >> 2;
|
---|
277 | m_pos -= *ip++ << 6;
|
---|
278 | if (m_pos == op)
|
---|
279 | goto eof_found;
|
---|
280 | m_pos -= 0x4000;
|
---|
281 | }
|
---|
282 | if (litp == NULL)
|
---|
283 | goto copy_m;
|
---|
284 |
|
---|
285 | nl = ip[-2] & 3;
|
---|
286 | /* test if in beetween two matches */
|
---|
287 | if (t == 1 && lit == 0 && nl == 0 && ip[0] >= 16) {
|
---|
288 | next_lit = nl;
|
---|
289 | /* make a previous short run */
|
---|
290 | lit += 3;
|
---|
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));
|
---|
294 | o_m3_a++;
|
---|
295 | }
|
---|
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)
|
---|
299 | ) {
|
---|
300 | t = *ip++;
|
---|
301 | /* remove short run */
|
---|
302 | *litp &= ~3;
|
---|
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 */
|
---|
306 | litp += 2;
|
---|
307 | if (lit > 0)
|
---|
308 | memmove(litp+1,litp,lit);
|
---|
309 | /* insert new length of long literal run */
|
---|
310 | lit += 3 + t + 3;
|
---|
311 | *litp = (unsigned char)(lit - 3);
|
---|
312 |
|
---|
313 | o_m3_b++;
|
---|
314 | *op++ = *m_pos++;
|
---|
315 | *op++ = *m_pos++;
|
---|
316 | *op++ = *m_pos++;
|
---|
317 | goto copy_literal_run;
|
---|
318 | }
|
---|
319 | }
|
---|
320 | copy_m:
|
---|
321 | *op++ = *m_pos++;
|
---|
322 | *op++ = *m_pos++;
|
---|
323 | do *op++ = *m_pos++; while (--t > 0);
|
---|
324 | }
|
---|
325 |
|
---|
326 | match_done:
|
---|
327 | if (next_lit == NO_LIT) {
|
---|
328 | t = ip[-2] & 3;
|
---|
329 | lit = t;
|
---|
330 | litp = ip - 2;
|
---|
331 | }
|
---|
332 | else
|
---|
333 | t = next_lit;
|
---|
334 | next_lit = NO_LIT;
|
---|
335 | if (t == 0)
|
---|
336 | break;
|
---|
337 | /* copy literals */
|
---|
338 | match_next:
|
---|
339 | do *op++ = *ip++; while (--t > 0);
|
---|
340 | t = *ip++;
|
---|
341 | } while (TEST_IP && TEST_OP);
|
---|
342 | }
|
---|
343 |
|
---|
344 | /* no EOF code was found */
|
---|
345 | *out_len = pd(op, out);
|
---|
346 | return LZO_E_EOF_NOT_FOUND;
|
---|
347 |
|
---|
348 | eof_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));
|
---|
354 | }
|
---|
355 |
|
---|
356 | /**********************************************************************/
|
---|
357 | #define F_OS F_OS_UNIX
|
---|
358 | #define F_CS F_CS_NATIVE
|
---|
359 |
|
---|
360 | /**********************************************************************/
|
---|
361 | #define ADLER32_INIT_VALUE 1
|
---|
362 | #define CRC32_INIT_VALUE 0
|
---|
363 |
|
---|
364 | /**********************************************************************/
|
---|
365 | enum {
|
---|
366 | M_LZO1X_1 = 1,
|
---|
367 | M_LZO1X_1_15 = 2,
|
---|
368 | M_LZO1X_999 = 3,
|
---|
369 | };
|
---|
370 |
|
---|
371 | /**********************************************************************/
|
---|
372 | /* header flags */
|
---|
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
|
---|
382 |
|
---|
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
|
---|
387 |
|
---|
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
|
---|
392 |
|
---|
393 | /* these bits must be zero */
|
---|
394 | #define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
|
---|
395 |
|
---|
396 | typedef struct chksum_t {
|
---|
397 | uint32_t f_adler32;
|
---|
398 | uint32_t f_crc32;
|
---|
399 | } chksum_t;
|
---|
400 |
|
---|
401 | typedef struct header_t {
|
---|
402 | unsigned version;
|
---|
403 | unsigned lib_version;
|
---|
404 | unsigned version_needed_to_extract;
|
---|
405 | uint32_t flags;
|
---|
406 | uint32_t mode;
|
---|
407 | uint32_t mtime;
|
---|
408 | uint32_t gmtdiff;
|
---|
409 | uint32_t header_checksum;
|
---|
410 |
|
---|
411 | uint32_t extra_field_len;
|
---|
412 | uint32_t extra_field_checksum;
|
---|
413 |
|
---|
414 | unsigned char method;
|
---|
415 | unsigned char level;
|
---|
416 |
|
---|
417 | /* info */
|
---|
418 | char name[255+1];
|
---|
419 | } header_t;
|
---|
420 |
|
---|
421 | struct globals {
|
---|
422 | /*const uint32_t *lzo_crc32_table;*/
|
---|
423 | chksum_t chksum_in;
|
---|
424 | chksum_t chksum_out;
|
---|
425 | } FIX_ALIASING;
|
---|
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)));
|
---|
431 | //} while (0)
|
---|
432 |
|
---|
433 |
|
---|
434 | /**********************************************************************/
|
---|
435 | #define LZOP_VERSION 0x1010
|
---|
436 | //#define LZOP_VERSION_STRING "1.01"
|
---|
437 | //#define LZOP_VERSION_DATE "Apr 27th 2003"
|
---|
438 |
|
---|
439 | #define OPTION_STRING "cfvdt123456789CF"
|
---|
440 |
|
---|
441 | enum {
|
---|
442 | OPT_STDOUT = (1 << 0),
|
---|
443 | OPT_FORCE = (1 << 1),
|
---|
444 | OPT_VERBOSE = (1 << 2),
|
---|
445 | OPT_DECOMPRESS = (1 << 3),
|
---|
446 | OPT_TEST = (1 << 4),
|
---|
447 | OPT_1 = (1 << 5),
|
---|
448 | OPT_2 = (1 << 6),
|
---|
449 | OPT_3 = (1 << 7),
|
---|
450 | OPT_4 = (1 << 8),
|
---|
451 | OPT_5 = (1 << 9),
|
---|
452 | OPT_6 = (1 << 10),
|
---|
453 | OPT_789 = (7 << 11),
|
---|
454 | OPT_7 = (1 << 11),
|
---|
455 | OPT_8 = (1 << 12),
|
---|
456 | OPT_C = (1 << 14),
|
---|
457 | OPT_F = (1 << 15),
|
---|
458 | };
|
---|
459 |
|
---|
460 | /**********************************************************************/
|
---|
461 | // adler32 checksum
|
---|
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)
|
---|
467 | {
|
---|
468 | enum {
|
---|
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 */
|
---|
472 | LZO_NMAX = 5552,
|
---|
473 | };
|
---|
474 | uint32_t s1 = adler & 0xffff;
|
---|
475 | uint32_t s2 = (adler >> 16) & 0xffff;
|
---|
476 | unsigned k;
|
---|
477 |
|
---|
478 | if (buf == NULL)
|
---|
479 | return 1;
|
---|
480 |
|
---|
481 | while (len > 0) {
|
---|
482 | k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
|
---|
483 | len -= k;
|
---|
484 | if (k != 0) do {
|
---|
485 | s1 += *buf++;
|
---|
486 | s2 += s1;
|
---|
487 | } while (--k > 0);
|
---|
488 | s1 %= LZO_BASE;
|
---|
489 | s2 %= LZO_BASE;
|
---|
490 | }
|
---|
491 | return (s2 << 16) | s1;
|
---|
492 | }
|
---|
493 |
|
---|
494 | static FAST_FUNC uint32_t
|
---|
495 | lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
|
---|
496 | {
|
---|
497 | //if (buf == NULL) - impossible
|
---|
498 | // return 0;
|
---|
499 |
|
---|
500 | return ~crc32_block_endian0(~c, buf, len, global_crc32_table);
|
---|
501 | }
|
---|
502 |
|
---|
503 | /**********************************************************************/
|
---|
504 | static void init_chksum(chksum_t *ct)
|
---|
505 | {
|
---|
506 | ct->f_adler32 = ADLER32_INIT_VALUE;
|
---|
507 | ct->f_crc32 = CRC32_INIT_VALUE;
|
---|
508 | }
|
---|
509 |
|
---|
510 | static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
|
---|
511 | {
|
---|
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
|
---|
514 | * eventually need */
|
---|
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);
|
---|
517 | }
|
---|
518 |
|
---|
519 | static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
|
---|
520 | {
|
---|
521 | return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
|
---|
522 | }
|
---|
523 |
|
---|
524 | /**********************************************************************/
|
---|
525 | static uint32_t read32(void)
|
---|
526 | {
|
---|
527 | uint32_t v;
|
---|
528 | xread(0, &v, 4);
|
---|
529 | return ntohl(v);
|
---|
530 | }
|
---|
531 |
|
---|
532 | static void write32(uint32_t v)
|
---|
533 | {
|
---|
534 | v = htonl(v);
|
---|
535 | xwrite(1, &v, 4);
|
---|
536 | }
|
---|
537 |
|
---|
538 | static void f_write(const void* buf, int cnt)
|
---|
539 | {
|
---|
540 | xwrite(1, buf, cnt);
|
---|
541 | add_bytes_to_chksum(&G.chksum_out, buf, cnt);
|
---|
542 | }
|
---|
543 |
|
---|
544 | static void f_read(void* buf, int cnt)
|
---|
545 | {
|
---|
546 | xread(0, buf, cnt);
|
---|
547 | add_bytes_to_chksum(&G.chksum_in, buf, cnt);
|
---|
548 | }
|
---|
549 |
|
---|
550 | static int f_read8(void)
|
---|
551 | {
|
---|
552 | uint8_t v;
|
---|
553 | f_read(&v, 1);
|
---|
554 | return v;
|
---|
555 | }
|
---|
556 |
|
---|
557 | static void f_write8(uint8_t v)
|
---|
558 | {
|
---|
559 | f_write(&v, 1);
|
---|
560 | }
|
---|
561 |
|
---|
562 | static unsigned f_read16(void)
|
---|
563 | {
|
---|
564 | uint16_t v;
|
---|
565 | f_read(&v, 2);
|
---|
566 | return ntohs(v);
|
---|
567 | }
|
---|
568 |
|
---|
569 | static void f_write16(uint16_t v)
|
---|
570 | {
|
---|
571 | v = htons(v);
|
---|
572 | f_write(&v, 2);
|
---|
573 | }
|
---|
574 |
|
---|
575 | static uint32_t f_read32(void)
|
---|
576 | {
|
---|
577 | uint32_t v;
|
---|
578 | f_read(&v, 4);
|
---|
579 | return ntohl(v);
|
---|
580 | }
|
---|
581 |
|
---|
582 | static void f_write32(uint32_t v)
|
---|
583 | {
|
---|
584 | v = htonl(v);
|
---|
585 | f_write(&v, 4);
|
---|
586 | }
|
---|
587 |
|
---|
588 | /**********************************************************************/
|
---|
589 | static int lzo_get_method(header_t *h)
|
---|
590 | {
|
---|
591 | /* check method */
|
---|
592 | if (h->method == M_LZO1X_1) {
|
---|
593 | if (h->level == 0)
|
---|
594 | h->level = 3;
|
---|
595 | } else if (h->method == M_LZO1X_1_15) {
|
---|
596 | if (h->level == 0)
|
---|
597 | h->level = 1;
|
---|
598 | } else if (h->method == M_LZO1X_999) {
|
---|
599 | if (h->level == 0)
|
---|
600 | h->level = 9;
|
---|
601 | } else
|
---|
602 | return -1; /* not a LZO method */
|
---|
603 |
|
---|
604 | /* check compression level */
|
---|
605 | if (h->level < 1 || h->level > 9)
|
---|
606 | return 15;
|
---|
607 |
|
---|
608 | return 0;
|
---|
609 | }
|
---|
610 |
|
---|
611 | /**********************************************************************/
|
---|
612 | #define LZO_BLOCK_SIZE (256 * 1024l)
|
---|
613 | #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
|
---|
614 |
|
---|
615 | /* LZO may expand uncompressible data by a small amount */
|
---|
616 | #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
|
---|
617 |
|
---|
618 | /**********************************************************************/
|
---|
619 | // compress a file
|
---|
620 | /**********************************************************************/
|
---|
621 | static NOINLINE smallint lzo_compress(const header_t *h)
|
---|
622 | {
|
---|
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;
|
---|
630 | int l;
|
---|
631 | smallint ok = 1;
|
---|
632 | uint8_t *wrk_mem = NULL;
|
---|
633 |
|
---|
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);
|
---|
640 |
|
---|
641 | for (;;) {
|
---|
642 | /* read a block */
|
---|
643 | l = full_read(0, b1, block_size);
|
---|
644 | src_len = (l > 0 ? l : 0);
|
---|
645 |
|
---|
646 | /* write uncompressed block size */
|
---|
647 | write32(src_len);
|
---|
648 |
|
---|
649 | /* exit if last block */
|
---|
650 | if (src_len == 0)
|
---|
651 | break;
|
---|
652 |
|
---|
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);
|
---|
658 |
|
---|
659 | /* compress */
|
---|
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,
|
---|
667 | wrk_mem, h->level);
|
---|
668 | #endif
|
---|
669 | else
|
---|
670 | bb_error_msg_and_die("internal error");
|
---|
671 |
|
---|
672 | if (r != 0) /* not LZO_E_OK */
|
---|
673 | bb_error_msg_and_die("internal error - compression failed");
|
---|
674 |
|
---|
675 | /* write compressed block size */
|
---|
676 | if (dst_len < src_len) {
|
---|
677 | /* optimize */
|
---|
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");
|
---|
683 | }
|
---|
684 | write32(dst_len);
|
---|
685 | } else {
|
---|
686 | /* data actually expanded => store data uncompressed */
|
---|
687 | write32(src_len);
|
---|
688 | }
|
---|
689 |
|
---|
690 | /* write checksum of uncompressed block */
|
---|
691 | if (h->flags & F_ADLER32_D)
|
---|
692 | write32(d_adler32);
|
---|
693 | if (h->flags & F_CRC32_D)
|
---|
694 | write32(d_crc32);
|
---|
695 |
|
---|
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);
|
---|
704 | } else {
|
---|
705 | /* write uncompressed block data */
|
---|
706 | xwrite(1, b1, src_len);
|
---|
707 | }
|
---|
708 | }
|
---|
709 |
|
---|
710 | free(wrk_mem);
|
---|
711 | free(b1);
|
---|
712 | free(b2);
|
---|
713 | return ok;
|
---|
714 | }
|
---|
715 |
|
---|
716 | static FAST_FUNC void lzo_check(
|
---|
717 | uint32_t init,
|
---|
718 | uint8_t* buf, unsigned len,
|
---|
719 | uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
|
---|
720 | uint32_t ref)
|
---|
721 | {
|
---|
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.
|
---|
725 | */
|
---|
726 | uint32_t c = fn(init, buf, len);
|
---|
727 | if (c != ref)
|
---|
728 | bb_error_msg_and_die("checksum error");
|
---|
729 | }
|
---|
730 |
|
---|
731 | /**********************************************************************/
|
---|
732 | // decompress a file
|
---|
733 | /**********************************************************************/
|
---|
734 | static NOINLINE smallint lzo_decompress(const header_t *h)
|
---|
735 | {
|
---|
736 | unsigned block_size = LZO_BLOCK_SIZE;
|
---|
737 | int r;
|
---|
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;
|
---|
742 | smallint ok = 1;
|
---|
743 | uint8_t *b1;
|
---|
744 | uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
|
---|
745 | uint8_t *b2 = NULL;
|
---|
746 |
|
---|
747 | for (;;) {
|
---|
748 | uint8_t *dst;
|
---|
749 |
|
---|
750 | /* read uncompressed block size */
|
---|
751 | dst_len = read32();
|
---|
752 |
|
---|
753 | /* exit if last block */
|
---|
754 | if (dst_len == 0)
|
---|
755 | break;
|
---|
756 |
|
---|
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");
|
---|
761 |
|
---|
762 | if (dst_len > MAX_BLOCK_SIZE)
|
---|
763 | bb_error_msg_and_die("corrupted data");
|
---|
764 |
|
---|
765 | /* read compressed block size */
|
---|
766 | src_len = read32();
|
---|
767 | if (src_len <= 0 || src_len > dst_len)
|
---|
768 | bb_error_msg_and_die("corrupted data");
|
---|
769 |
|
---|
770 | if (dst_len > block_size) {
|
---|
771 | if (b2) {
|
---|
772 | free(b2);
|
---|
773 | b2 = NULL;
|
---|
774 | }
|
---|
775 | block_size = dst_len;
|
---|
776 | mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
|
---|
777 | }
|
---|
778 |
|
---|
779 | /* read checksum of uncompressed block */
|
---|
780 | if (h->flags & F_ADLER32_D)
|
---|
781 | d_adler32 = read32();
|
---|
782 | if (h->flags & F_CRC32_D)
|
---|
783 | d_crc32 = read32();
|
---|
784 |
|
---|
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)
|
---|
790 | c_crc32 = read32();
|
---|
791 | }
|
---|
792 |
|
---|
793 | if (b2 == NULL)
|
---|
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);
|
---|
798 |
|
---|
799 | if (src_len < dst_len) {
|
---|
800 | unsigned d = dst_len;
|
---|
801 |
|
---|
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,
|
---|
806 | b1, src_len,
|
---|
807 | lzo_adler32, c_adler32);
|
---|
808 | if (h->flags & F_CRC32_C)
|
---|
809 | lzo_check(CRC32_INIT_VALUE,
|
---|
810 | b1, src_len,
|
---|
811 | lzo_crc32, c_crc32);
|
---|
812 | }
|
---|
813 |
|
---|
814 | /* decompress */
|
---|
815 | // if (option_mask32 & OPT_F)
|
---|
816 | // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
|
---|
817 | // else
|
---|
818 | r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
|
---|
819 |
|
---|
820 | if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
|
---|
821 | bb_error_msg_and_die("corrupted data");
|
---|
822 | }
|
---|
823 | dst = b2;
|
---|
824 | } else {
|
---|
825 | /* "stored" block => no decompression */
|
---|
826 | dst = b1;
|
---|
827 | }
|
---|
828 |
|
---|
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,
|
---|
833 | dst, dst_len,
|
---|
834 | lzo_adler32, d_adler32);
|
---|
835 | if (h->flags & F_CRC32_D)
|
---|
836 | lzo_check(CRC32_INIT_VALUE,
|
---|
837 | dst, dst_len,
|
---|
838 | lzo_crc32, d_crc32);
|
---|
839 | }
|
---|
840 |
|
---|
841 | /* write uncompressed block data */
|
---|
842 | xwrite(1, dst, dst_len);
|
---|
843 | }
|
---|
844 |
|
---|
845 | free(b2);
|
---|
846 | return ok;
|
---|
847 | }
|
---|
848 |
|
---|
849 | /**********************************************************************/
|
---|
850 | // lzop file signature (shamelessly borrowed from PNG)
|
---|
851 | /**********************************************************************/
|
---|
852 | /*
|
---|
853 | * The first nine bytes of a lzop file always contain the following values:
|
---|
854 | *
|
---|
855 | * 0 1 2 3 4 5 6 7 8
|
---|
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
|
---|
860 | */
|
---|
861 |
|
---|
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
|
---|
866 | * ^^^^^ ^^^^^
|
---|
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 | * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
|
---|
871 | * flags mode mtime
|
---|
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
|
---|
874 | * ^^^^^^^^^^^
|
---|
875 | * chksum_out
|
---|
876 | * The rest is identical.
|
---|
877 | */
|
---|
878 | static const unsigned char lzop_magic[9] = {
|
---|
879 | 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
|
---|
880 | };
|
---|
881 |
|
---|
882 | /* This coding is derived from Alexander Lehmann's pngcheck code. */
|
---|
883 | static void check_magic(void)
|
---|
884 | {
|
---|
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");
|
---|
889 | }
|
---|
890 |
|
---|
891 | /**********************************************************************/
|
---|
892 | // lzop file header
|
---|
893 | /**********************************************************************/
|
---|
894 | static void write_header(const header_t *h)
|
---|
895 | {
|
---|
896 | int l;
|
---|
897 |
|
---|
898 | xwrite(1, lzop_magic, sizeof(lzop_magic));
|
---|
899 |
|
---|
900 | init_chksum(&G.chksum_out);
|
---|
901 |
|
---|
902 | f_write16(h->version);
|
---|
903 | f_write16(h->lib_version);
|
---|
904 | f_write16(h->version_needed_to_extract);
|
---|
905 | f_write8(h->method);
|
---|
906 | f_write8(h->level);
|
---|
907 | f_write32(h->flags);
|
---|
908 | f_write32(h->mode);
|
---|
909 | f_write32(h->mtime);
|
---|
910 | f_write32(h->gmtdiff);
|
---|
911 |
|
---|
912 | l = (int) strlen(h->name);
|
---|
913 | f_write8(l);
|
---|
914 | if (l)
|
---|
915 | f_write(h->name, l);
|
---|
916 |
|
---|
917 | f_write32(chksum_getresult(&G.chksum_out, h));
|
---|
918 | }
|
---|
919 |
|
---|
920 | static int read_header(header_t *h)
|
---|
921 | {
|
---|
922 | int r;
|
---|
923 | int l;
|
---|
924 | uint32_t checksum;
|
---|
925 |
|
---|
926 | memset(h, 0, sizeof(*h));
|
---|
927 | h->version_needed_to_extract = 0x0900; /* first lzop version */
|
---|
928 | h->level = 0;
|
---|
929 |
|
---|
930 | init_chksum(&G.chksum_in);
|
---|
931 |
|
---|
932 | h->version = f_read16();
|
---|
933 | if (h->version < 0x0900)
|
---|
934 | return 3;
|
---|
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)
|
---|
939 | return 16;
|
---|
940 | if (h->version_needed_to_extract < 0x0900)
|
---|
941 | return 3;
|
---|
942 | }
|
---|
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();
|
---|
953 |
|
---|
954 | l = f_read8();
|
---|
955 | if (l > 0)
|
---|
956 | f_read(h->name, l);
|
---|
957 | h->name[l] = 0;
|
---|
958 |
|
---|
959 | checksum = chksum_getresult(&G.chksum_in, h);
|
---|
960 | h->header_checksum = f_read32();
|
---|
961 | if (h->header_checksum != checksum)
|
---|
962 | return 2;
|
---|
963 |
|
---|
964 | if (h->method <= 0)
|
---|
965 | return 14;
|
---|
966 | r = lzo_get_method(h);
|
---|
967 | if (r != 0)
|
---|
968 | return r;
|
---|
969 |
|
---|
970 | /* check reserved flags */
|
---|
971 | if (h->flags & F_RESERVED)
|
---|
972 | return -13;
|
---|
973 |
|
---|
974 | /* skip extra field [not used yet] */
|
---|
975 | if (h->flags & F_H_EXTRA_FIELD) {
|
---|
976 | uint32_t k;
|
---|
977 |
|
---|
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++)
|
---|
982 | f_read8();
|
---|
983 | checksum = chksum_getresult(&G.chksum_in, h);
|
---|
984 | h->extra_field_checksum = f_read32();
|
---|
985 | if (h->extra_field_checksum != checksum)
|
---|
986 | return 3;
|
---|
987 | }
|
---|
988 |
|
---|
989 | return 0;
|
---|
990 | }
|
---|
991 |
|
---|
992 | static void p_header(header_t *h)
|
---|
993 | {
|
---|
994 | int r;
|
---|
995 |
|
---|
996 | r = read_header(h);
|
---|
997 | if (r == 0)
|
---|
998 | return;
|
---|
999 | bb_error_msg_and_die("header_error %d", r);
|
---|
1000 | }
|
---|
1001 |
|
---|
1002 | /**********************************************************************/
|
---|
1003 | // compress
|
---|
1004 | /**********************************************************************/
|
---|
1005 | static void lzo_set_method(header_t *h)
|
---|
1006 | {
|
---|
1007 | int level = 1;
|
---|
1008 |
|
---|
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)
|
---|
1015 | level = 7;
|
---|
1016 | else if (option_mask32 & OPT_8)
|
---|
1017 | level = 8;
|
---|
1018 | else
|
---|
1019 | level = 9;
|
---|
1020 | #else
|
---|
1021 | bb_error_msg_and_die("high compression not compiled in");
|
---|
1022 | #endif
|
---|
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 */
|
---|
1026 | }
|
---|
1027 |
|
---|
1028 | h->level = level;
|
---|
1029 | }
|
---|
1030 |
|
---|
1031 | static smallint do_lzo_compress(void)
|
---|
1032 | {
|
---|
1033 | header_t header;
|
---|
1034 |
|
---|
1035 | #define h (&header)
|
---|
1036 | memset(h, 0, sizeof(*h));
|
---|
1037 |
|
---|
1038 | lzo_set_method(h);
|
---|
1039 |
|
---|
1040 | h->version = (LZOP_VERSION & 0xffff);
|
---|
1041 | h->version_needed_to_extract = 0x0940;
|
---|
1042 | h->lib_version = lzo_version() & 0xffff;
|
---|
1043 |
|
---|
1044 | h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
|
---|
1045 |
|
---|
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;
|
---|
1050 | }
|
---|
1051 | write_header(h);
|
---|
1052 | return lzo_compress(h);
|
---|
1053 | #undef h
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 | /**********************************************************************/
|
---|
1057 | // decompress
|
---|
1058 | /**********************************************************************/
|
---|
1059 | static smallint do_lzo_decompress(void)
|
---|
1060 | {
|
---|
1061 | header_t header;
|
---|
1062 |
|
---|
1063 | check_magic();
|
---|
1064 | p_header(&header);
|
---|
1065 | return lzo_decompress(&header);
|
---|
1066 | }
|
---|
1067 |
|
---|
1068 | static char* FAST_FUNC make_new_name_lzop(char *filename, const char *expected_ext UNUSED_PARAM)
|
---|
1069 | {
|
---|
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);
|
---|
1074 | *extension = '\0';
|
---|
1075 | return filename;
|
---|
1076 | }
|
---|
1077 | return xasprintf("%s.lzo", filename);
|
---|
1078 | }
|
---|
1079 |
|
---|
1080 | static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(transformer_aux_data_t *aux UNUSED_PARAM)
|
---|
1081 | {
|
---|
1082 | if (option_mask32 & OPT_DECOMPRESS)
|
---|
1083 | return do_lzo_decompress();
|
---|
1084 | return do_lzo_compress();
|
---|
1085 | }
|
---|
1086 |
|
---|
1087 | int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1088 | int lzop_main(int argc UNUSED_PARAM, char **argv)
|
---|
1089 | {
|
---|
1090 | getopt32(argv, OPTION_STRING);
|
---|
1091 | argv += optind;
|
---|
1092 | /* lzopcat? */
|
---|
1093 | if (applet_name[4] == 'c')
|
---|
1094 | option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
|
---|
1095 | /* unlzop? */
|
---|
1096 | if (applet_name[0] == 'u')
|
---|
1097 | option_mask32 |= OPT_DECOMPRESS;
|
---|
1098 |
|
---|
1099 | global_crc32_table = crc32_filltable(NULL, 0);
|
---|
1100 | return bbunpack(argv, pack_lzop, make_new_name_lzop, /*unused:*/ NULL);
|
---|
1101 | }
|
---|