source: trunk/minix/commands/bzip2-1.0.3/bzlib.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 46.4 KB
Line 
1
2/*-------------------------------------------------------------*/
3/*--- Library top-level functions. ---*/
4/*--- bzlib.c ---*/
5/*-------------------------------------------------------------*/
6
7/*--
8 This file is a part of bzip2 and/or libbzip2, a program and
9 library for lossless, block-sorting data compression.
10
11 Copyright (C) 1996-2005 Julian R Seward. All rights reserved.
12
13 Redistribution and use in source and binary forms, with or without
14 modification, are permitted provided that the following conditions
15 are met:
16
17 1. Redistributions of source code must retain the above copyright
18 notice, this list of conditions and the following disclaimer.
19
20 2. The origin of this software must not be misrepresented; you must
21 not claim that you wrote the original software. If you use this
22 software in a product, an acknowledgment in the product
23 documentation would be appreciated but is not required.
24
25 3. Altered source versions must be plainly marked as such, and must
26 not be misrepresented as being the original software.
27
28 4. The name of the author may not be used to endorse or promote
29 products derived from this software without specific prior written
30 permission.
31
32 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
33 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
34 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
36 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
38 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
40 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
41 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
42 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43
44 Julian Seward, Cambridge, UK.
45 jseward@bzip.org
46 bzip2/libbzip2 version 1.0 of 21 March 2000
47
48 This program is based on (at least) the work of:
49 Mike Burrows
50 David Wheeler
51 Peter Fenwick
52 Alistair Moffat
53 Radford Neal
54 Ian H. Witten
55 Robert Sedgewick
56 Jon L. Bentley
57
58 For more information on these sources, see the manual.
59--*/
60
61/*--
62 CHANGES
63 ~~~~~~~
64 0.9.0 -- original version.
65
66 0.9.0a/b -- no changes in this file.
67
68 0.9.0c
69 * made zero-length BZ_FLUSH work correctly in bzCompress().
70 * fixed bzWrite/bzRead to ignore zero-length requests.
71 * fixed bzread to correctly handle read requests after EOF.
72 * wrong parameter order in call to bzDecompressInit in
73 bzBuffToBuffDecompress. Fixed.
74--*/
75
76#include "bzlib_private.h"
77
78
79/*---------------------------------------------------*/
80/*--- Compression stuff ---*/
81/*---------------------------------------------------*/
82
83
84/*---------------------------------------------------*/
85#ifndef BZ_NO_STDIO
86void BZ2_bz__AssertH__fail ( int errcode )
87{
88 fprintf(stderr,
89 "\n\nbzip2/libbzip2: internal error number %d.\n"
90 "This is a bug in bzip2/libbzip2, %s.\n"
91 "Please report it to me at: jseward@bzip.org. If this happened\n"
92 "when you were using some program which uses libbzip2 as a\n"
93 "component, you should also report this bug to the author(s)\n"
94 "of that program. Please make an effort to report this bug;\n"
95 "timely and accurate bug reports eventually lead to higher\n"
96 "quality software. Thanks. Julian Seward, 15 February 2005.\n\n",
97 errcode,
98 BZ2_bzlibVersion()
99 );
100
101 if (errcode == 1007) {
102 fprintf(stderr,
103 "\n*** A special note about internal error number 1007 ***\n"
104 "\n"
105 "Experience suggests that a common cause of i.e. 1007\n"
106 "is unreliable memory or other hardware. The 1007 assertion\n"
107 "just happens to cross-check the results of huge numbers of\n"
108 "memory reads/writes, and so acts (unintendedly) as a stress\n"
109 "test of your memory system.\n"
110 "\n"
111 "I suggest the following: try compressing the file again,\n"
112 "possibly monitoring progress in detail with the -vv flag.\n"
113 "\n"
114 "* If the error cannot be reproduced, and/or happens at different\n"
115 " points in compression, you may have a flaky memory system.\n"
116 " Try a memory-test program. I have used Memtest86\n"
117 " (www.memtest86.com). At the time of writing it is free (GPLd).\n"
118 " Memtest86 tests memory much more thorougly than your BIOSs\n"
119 " power-on test, and may find failures that the BIOS doesn't.\n"
120 "\n"
121 "* If the error can be repeatably reproduced, this is a bug in\n"
122 " bzip2, and I would very much like to hear about it. Please\n"
123 " let me know, and, ideally, save a copy of the file causing the\n"
124 " problem -- without which I will be unable to investigate it.\n"
125 "\n"
126 );
127 }
128
129 exit(3);
130}
131#endif
132
133
134/*---------------------------------------------------*/
135static
136int bz_config_ok ( void )
137{
138 if (sizeof(int) != 4) return 0;
139 if (sizeof(short) != 2) return 0;
140 if (sizeof(char) != 1) return 0;
141 return 1;
142}
143
144
145/*---------------------------------------------------*/
146static
147void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
148{
149 void* v = malloc ( items * size );
150 return v;
151}
152
153static
154void default_bzfree ( void* opaque, void* addr )
155{
156 if (addr != NULL) free ( addr );
157}
158
159
160/*---------------------------------------------------*/
161static
162void prepare_new_block ( EState* s )
163{
164 Int32 i;
165 s->nblock = 0;
166 s->numZ = 0;
167 s->state_out_pos = 0;
168 BZ_INITIALISE_CRC ( s->blockCRC );
169 for (i = 0; i < 256; i++) s->inUse[i] = False;
170 s->blockNo++;
171}
172
173
174/*---------------------------------------------------*/
175static
176void init_RL ( EState* s )
177{
178 s->state_in_ch = 256;
179 s->state_in_len = 0;
180}
181
182
183static
184Bool isempty_RL ( EState* s )
185{
186 if (s->state_in_ch < 256 && s->state_in_len > 0)
187 return False; else
188 return True;
189}
190
191
192/*---------------------------------------------------*/
193int BZ_API(BZ2_bzCompressInit)
194 ( bz_stream* strm,
195 int blockSize100k,
196 int verbosity,
197 int workFactor )
198{
199 Int32 n;
200 EState* s;
201
202 if (!bz_config_ok()) return BZ_CONFIG_ERROR;
203
204 if (strm == NULL ||
205 blockSize100k < 1 || blockSize100k > 9 ||
206 workFactor < 0 || workFactor > 250)
207 return BZ_PARAM_ERROR;
208
209 if (workFactor == 0) workFactor = 30;
210 if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
211 if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
212
213 s = BZALLOC( sizeof(EState) );
214 if (s == NULL) return BZ_MEM_ERROR;
215 s->strm = strm;
216
217 s->arr1 = NULL;
218 s->arr2 = NULL;
219 s->ftab = NULL;
220
221 n = 100000 * blockSize100k;
222 s->arr1 = BZALLOC( n * sizeof(UInt32) );
223 s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
224 s->ftab = BZALLOC( 65537 * sizeof(UInt32) );
225
226 if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) {
227 if (s->arr1 != NULL) BZFREE(s->arr1);
228 if (s->arr2 != NULL) BZFREE(s->arr2);
229 if (s->ftab != NULL) BZFREE(s->ftab);
230 if (s != NULL) BZFREE(s);
231 return BZ_MEM_ERROR;
232 }
233
234 s->blockNo = 0;
235 s->state = BZ_S_INPUT;
236 s->mode = BZ_M_RUNNING;
237 s->combinedCRC = 0;
238 s->blockSize100k = blockSize100k;
239 s->nblockMAX = 100000 * blockSize100k - 19;
240 s->verbosity = verbosity;
241 s->workFactor = workFactor;
242
243 s->block = (UChar*)s->arr2;
244 s->mtfv = (UInt16*)s->arr1;
245 s->zbits = NULL;
246 s->ptr = (UInt32*)s->arr1;
247
248 strm->state = s;
249 strm->total_in_lo32 = 0;
250 strm->total_in_hi32 = 0;
251 strm->total_out_lo32 = 0;
252 strm->total_out_hi32 = 0;
253 init_RL ( s );
254 prepare_new_block ( s );
255 return BZ_OK;
256}
257
258
259/*---------------------------------------------------*/
260static
261void add_pair_to_block ( EState* s )
262{
263 Int32 i;
264 UChar ch = (UChar)(s->state_in_ch);
265 for (i = 0; i < s->state_in_len; i++) {
266 BZ_UPDATE_CRC( s->blockCRC, ch );
267 }
268 s->inUse[s->state_in_ch] = True;
269 switch (s->state_in_len) {
270 case 1:
271 s->block[s->nblock] = (UChar)ch; s->nblock++;
272 break;
273 case 2:
274 s->block[s->nblock] = (UChar)ch; s->nblock++;
275 s->block[s->nblock] = (UChar)ch; s->nblock++;
276 break;
277 case 3:
278 s->block[s->nblock] = (UChar)ch; s->nblock++;
279 s->block[s->nblock] = (UChar)ch; s->nblock++;
280 s->block[s->nblock] = (UChar)ch; s->nblock++;
281 break;
282 default:
283 s->inUse[s->state_in_len-4] = True;
284 s->block[s->nblock] = (UChar)ch; s->nblock++;
285 s->block[s->nblock] = (UChar)ch; s->nblock++;
286 s->block[s->nblock] = (UChar)ch; s->nblock++;
287 s->block[s->nblock] = (UChar)ch; s->nblock++;
288 s->block[s->nblock] = ((UChar)(s->state_in_len-4));
289 s->nblock++;
290 break;
291 }
292}
293
294
295/*---------------------------------------------------*/
296static
297void flush_RL ( EState* s )
298{
299 if (s->state_in_ch < 256) add_pair_to_block ( s );
300 init_RL ( s );
301}
302
303
304/*---------------------------------------------------*/
305#define ADD_CHAR_TO_BLOCK(zs,zchh0) \
306{ \
307 UInt32 zchh = (UInt32)(zchh0); \
308 /*-- fast track the common case --*/ \
309 if (zchh != zs->state_in_ch && \
310 zs->state_in_len == 1) { \
311 UChar ch = (UChar)(zs->state_in_ch); \
312 BZ_UPDATE_CRC( zs->blockCRC, ch ); \
313 zs->inUse[zs->state_in_ch] = True; \
314 zs->block[zs->nblock] = (UChar)ch; \
315 zs->nblock++; \
316 zs->state_in_ch = zchh; \
317 } \
318 else \
319 /*-- general, uncommon cases --*/ \
320 if (zchh != zs->state_in_ch || \
321 zs->state_in_len == 255) { \
322 if (zs->state_in_ch < 256) \
323 add_pair_to_block ( zs ); \
324 zs->state_in_ch = zchh; \
325 zs->state_in_len = 1; \
326 } else { \
327 zs->state_in_len++; \
328 } \
329}
330
331
332/*---------------------------------------------------*/
333static
334Bool copy_input_until_stop ( EState* s )
335{
336 Bool progress_in = False;
337
338 if (s->mode == BZ_M_RUNNING) {
339
340 /*-- fast track the common case --*/
341 while (True) {
342 /*-- block full? --*/
343 if (s->nblock >= s->nblockMAX) break;
344 /*-- no input? --*/
345 if (s->strm->avail_in == 0) break;
346 progress_in = True;
347 ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
348 s->strm->next_in++;
349 s->strm->avail_in--;
350 s->strm->total_in_lo32++;
351 if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
352 }
353
354 } else {
355
356 /*-- general, uncommon case --*/
357 while (True) {
358 /*-- block full? --*/
359 if (s->nblock >= s->nblockMAX) break;
360 /*-- no input? --*/
361 if (s->strm->avail_in == 0) break;
362 /*-- flush/finish end? --*/
363 if (s->avail_in_expect == 0) break;
364 progress_in = True;
365 ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
366 s->strm->next_in++;
367 s->strm->avail_in--;
368 s->strm->total_in_lo32++;
369 if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
370 s->avail_in_expect--;
371 }
372 }
373 return progress_in;
374}
375
376
377/*---------------------------------------------------*/
378static
379Bool copy_output_until_stop ( EState* s )
380{
381 Bool progress_out = False;
382
383 while (True) {
384
385 /*-- no output space? --*/
386 if (s->strm->avail_out == 0) break;
387
388 /*-- block done? --*/
389 if (s->state_out_pos >= s->numZ) break;
390
391 progress_out = True;
392 *(s->strm->next_out) = s->zbits[s->state_out_pos];
393 s->state_out_pos++;
394 s->strm->avail_out--;
395 s->strm->next_out++;
396 s->strm->total_out_lo32++;
397 if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
398 }
399
400 return progress_out;
401}
402
403
404/*---------------------------------------------------*/
405static
406Bool handle_compress ( bz_stream* strm )
407{
408 Bool progress_in = False;
409 Bool progress_out = False;
410 EState* s = strm->state;
411
412 while (True) {
413
414 if (s->state == BZ_S_OUTPUT) {
415 progress_out |= copy_output_until_stop ( s );
416 if (s->state_out_pos < s->numZ) break;
417 if (s->mode == BZ_M_FINISHING &&
418 s->avail_in_expect == 0 &&
419 isempty_RL(s)) break;
420 prepare_new_block ( s );
421 s->state = BZ_S_INPUT;
422 if (s->mode == BZ_M_FLUSHING &&
423 s->avail_in_expect == 0 &&
424 isempty_RL(s)) break;
425 }
426
427 if (s->state == BZ_S_INPUT) {
428 progress_in |= copy_input_until_stop ( s );
429 if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) {
430 flush_RL ( s );
431 BZ2_compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) );
432 s->state = BZ_S_OUTPUT;
433 }
434 else
435 if (s->nblock >= s->nblockMAX) {
436 BZ2_compressBlock ( s, False );
437 s->state = BZ_S_OUTPUT;
438 }
439 else
440 if (s->strm->avail_in == 0) {
441 break;
442 }
443 }
444
445 }
446
447 return progress_in || progress_out;
448}
449
450
451/*---------------------------------------------------*/
452int BZ_API(BZ2_bzCompress) ( bz_stream *strm, int action )
453{
454 Bool progress;
455 EState* s;
456 if (strm == NULL) return BZ_PARAM_ERROR;
457 s = strm->state;
458 if (s == NULL) return BZ_PARAM_ERROR;
459 if (s->strm != strm) return BZ_PARAM_ERROR;
460
461 preswitch:
462 switch (s->mode) {
463
464 case BZ_M_IDLE:
465 return BZ_SEQUENCE_ERROR;
466
467 case BZ_M_RUNNING:
468 if (action == BZ_RUN) {
469 progress = handle_compress ( strm );
470 return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
471 }
472 else
473 if (action == BZ_FLUSH) {
474 s->avail_in_expect = strm->avail_in;
475 s->mode = BZ_M_FLUSHING;
476 goto preswitch;
477 }
478 else
479 if (action == BZ_FINISH) {
480 s->avail_in_expect = strm->avail_in;
481 s->mode = BZ_M_FINISHING;
482 goto preswitch;
483 }
484 else
485 return BZ_PARAM_ERROR;
486
487 case BZ_M_FLUSHING:
488 if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR;
489 if (s->avail_in_expect != s->strm->avail_in)
490 return BZ_SEQUENCE_ERROR;
491 progress = handle_compress ( strm );
492 if (s->avail_in_expect > 0 || !isempty_RL(s) ||
493 s->state_out_pos < s->numZ) return BZ_FLUSH_OK;
494 s->mode = BZ_M_RUNNING;
495 return BZ_RUN_OK;
496
497 case BZ_M_FINISHING:
498 if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR;
499 if (s->avail_in_expect != s->strm->avail_in)
500 return BZ_SEQUENCE_ERROR;
501 progress = handle_compress ( strm );
502 if (!progress) return BZ_SEQUENCE_ERROR;
503 if (s->avail_in_expect > 0 || !isempty_RL(s) ||
504 s->state_out_pos < s->numZ) return BZ_FINISH_OK;
505 s->mode = BZ_M_IDLE;
506 return BZ_STREAM_END;
507 }
508 return BZ_OK; /*--not reached--*/
509}
510
511
512/*---------------------------------------------------*/
513int BZ_API(BZ2_bzCompressEnd) ( bz_stream *strm )
514{
515 EState* s;
516 if (strm == NULL) return BZ_PARAM_ERROR;
517 s = strm->state;
518 if (s == NULL) return BZ_PARAM_ERROR;
519 if (s->strm != strm) return BZ_PARAM_ERROR;
520
521 if (s->arr1 != NULL) BZFREE(s->arr1);
522 if (s->arr2 != NULL) BZFREE(s->arr2);
523 if (s->ftab != NULL) BZFREE(s->ftab);
524 BZFREE(strm->state);
525
526 strm->state = NULL;
527
528 return BZ_OK;
529}
530
531
532/*---------------------------------------------------*/
533/*--- Decompression stuff ---*/
534/*---------------------------------------------------*/
535
536/*---------------------------------------------------*/
537int BZ_API(BZ2_bzDecompressInit)
538 ( bz_stream* strm,
539 int verbosity,
540 int small )
541{
542 DState* s;
543
544 if (!bz_config_ok()) return BZ_CONFIG_ERROR;
545
546 if (strm == NULL) return BZ_PARAM_ERROR;
547 if (small != 0 && small != 1) return BZ_PARAM_ERROR;
548 if (verbosity < 0 || verbosity > 4) return BZ_PARAM_ERROR;
549
550 if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
551 if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
552
553 s = BZALLOC( sizeof(DState) );
554 if (s == NULL) return BZ_MEM_ERROR;
555 s->strm = strm;
556 strm->state = s;
557 s->state = BZ_X_MAGIC_1;
558 s->bsLive = 0;
559 s->bsBuff = 0;
560 s->calculatedCombinedCRC = 0;
561 strm->total_in_lo32 = 0;
562 strm->total_in_hi32 = 0;
563 strm->total_out_lo32 = 0;
564 strm->total_out_hi32 = 0;
565 s->smallDecompress = (Bool)small;
566 s->ll4 = NULL;
567 s->ll16 = NULL;
568 s->tt = NULL;
569 s->currBlockNo = 0;
570 s->verbosity = verbosity;
571
572 return BZ_OK;
573}
574
575
576/*---------------------------------------------------*/
577/* Return True iff data corruption is discovered.
578 Returns False if there is no problem.
579*/
580static
581Bool unRLE_obuf_to_output_FAST ( DState* s )
582{
583 UChar k1;
584
585 if (s->blockRandomised) {
586
587 while (True) {
588 /* try to finish existing run */
589 while (True) {
590 if (s->strm->avail_out == 0) return False;
591 if (s->state_out_len == 0) break;
592 *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
593 BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
594 s->state_out_len--;
595 s->strm->next_out++;
596 s->strm->avail_out--;
597 s->strm->total_out_lo32++;
598 if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
599 }
600
601 /* can a new run be started? */
602 if (s->nblock_used == s->save_nblock+1) return False;
603
604 /* Only caused by corrupt data stream? */
605 if (s->nblock_used > s->save_nblock+1)
606 return True;
607
608 s->state_out_len = 1;
609 s->state_out_ch = s->k0;
610 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
611 k1 ^= BZ_RAND_MASK; s->nblock_used++;
612 if (s->nblock_used == s->save_nblock+1) continue;
613 if (k1 != s->k0) { s->k0 = k1; continue; };
614
615 s->state_out_len = 2;
616 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
617 k1 ^= BZ_RAND_MASK; s->nblock_used++;
618 if (s->nblock_used == s->save_nblock+1) continue;
619 if (k1 != s->k0) { s->k0 = k1; continue; };
620
621 s->state_out_len = 3;
622 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
623 k1 ^= BZ_RAND_MASK; s->nblock_used++;
624 if (s->nblock_used == s->save_nblock+1) continue;
625 if (k1 != s->k0) { s->k0 = k1; continue; };
626
627 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
628 k1 ^= BZ_RAND_MASK; s->nblock_used++;
629 s->state_out_len = ((Int32)k1) + 4;
630 BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK;
631 s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
632 }
633
634 } else {
635
636 /* restore */
637 UInt32 c_calculatedBlockCRC = s->calculatedBlockCRC;
638 UChar c_state_out_ch = s->state_out_ch;
639 Int32 c_state_out_len = s->state_out_len;
640 Int32 c_nblock_used = s->nblock_used;
641 Int32 c_k0 = s->k0;
642 UInt32* c_tt = s->tt;
643 UInt32 c_tPos = s->tPos;
644 char* cs_next_out = s->strm->next_out;
645 unsigned int cs_avail_out = s->strm->avail_out;
646 /* end restore */
647
648 UInt32 avail_out_INIT = cs_avail_out;
649 Int32 s_save_nblockPP = s->save_nblock+1;
650 unsigned int total_out_lo32_old;
651
652 while (True) {
653
654 /* try to finish existing run */
655 if (c_state_out_len > 0) {
656 while (True) {
657 if (cs_avail_out == 0) goto return_notr;
658 if (c_state_out_len == 1) break;
659 *( (UChar*)(cs_next_out) ) = c_state_out_ch;
660 BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
661 c_state_out_len--;
662 cs_next_out++;
663 cs_avail_out--;
664 }
665 s_state_out_len_eq_one:
666 {
667 if (cs_avail_out == 0) {
668 c_state_out_len = 1; goto return_notr;
669 };
670 *( (UChar*)(cs_next_out) ) = c_state_out_ch;
671 BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
672 cs_next_out++;
673 cs_avail_out--;
674 }
675 }
676 /* Only caused by corrupt data stream? */
677 if (c_nblock_used > s_save_nblockPP)
678 return True;
679
680 /* can a new run be started? */
681 if (c_nblock_used == s_save_nblockPP) {
682 c_state_out_len = 0; goto return_notr;
683 };
684 c_state_out_ch = c_k0;
685 BZ_GET_FAST_C(k1); c_nblock_used++;
686 if (k1 != c_k0) {
687 c_k0 = k1; goto s_state_out_len_eq_one;
688 };
689 if (c_nblock_used == s_save_nblockPP)
690 goto s_state_out_len_eq_one;
691
692 c_state_out_len = 2;
693 BZ_GET_FAST_C(k1); c_nblock_used++;
694 if (c_nblock_used == s_save_nblockPP) continue;
695 if (k1 != c_k0) { c_k0 = k1; continue; };
696
697 c_state_out_len = 3;
698 BZ_GET_FAST_C(k1); c_nblock_used++;
699 if (c_nblock_used == s_save_nblockPP) continue;
700 if (k1 != c_k0) { c_k0 = k1; continue; };
701
702 BZ_GET_FAST_C(k1); c_nblock_used++;
703 c_state_out_len = ((Int32)k1) + 4;
704 BZ_GET_FAST_C(c_k0); c_nblock_used++;
705 }
706
707 return_notr:
708 total_out_lo32_old = s->strm->total_out_lo32;
709 s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out);
710 if (s->strm->total_out_lo32 < total_out_lo32_old)
711 s->strm->total_out_hi32++;
712
713 /* save */
714 s->calculatedBlockCRC = c_calculatedBlockCRC;
715 s->state_out_ch = c_state_out_ch;
716 s->state_out_len = c_state_out_len;
717 s->nblock_used = c_nblock_used;
718 s->k0 = c_k0;
719 s->tt = c_tt;
720 s->tPos = c_tPos;
721 s->strm->next_out = cs_next_out;
722 s->strm->avail_out = cs_avail_out;
723 /* end save */
724 }
725 return False;
726}
727
728
729
730/*---------------------------------------------------*/
731__inline__ Int32 BZ2_indexIntoF ( Int32 indx, Int32 *cftab )
732{
733 Int32 nb, na, mid;
734 nb = 0;
735 na = 256;
736 do {
737 mid = (nb + na) >> 1;
738 if (indx >= cftab[mid]) nb = mid; else na = mid;
739 }
740 while (na - nb != 1);
741 return nb;
742}
743
744
745/*---------------------------------------------------*/
746/* Return True iff data corruption is discovered.
747 Returns False if there is no problem.
748*/
749static
750Bool unRLE_obuf_to_output_SMALL ( DState* s )
751{
752 UChar k1;
753
754 if (s->blockRandomised) {
755
756 while (True) {
757 /* try to finish existing run */
758 while (True) {
759 if (s->strm->avail_out == 0) return False;
760 if (s->state_out_len == 0) break;
761 *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
762 BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
763 s->state_out_len--;
764 s->strm->next_out++;
765 s->strm->avail_out--;
766 s->strm->total_out_lo32++;
767 if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
768 }
769
770 /* can a new run be started? */
771 if (s->nblock_used == s->save_nblock+1) return False;
772
773 /* Only caused by corrupt data stream? */
774 if (s->nblock_used > s->save_nblock+1)
775 return True;
776
777 s->state_out_len = 1;
778 s->state_out_ch = s->k0;
779 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
780 k1 ^= BZ_RAND_MASK; s->nblock_used++;
781 if (s->nblock_used == s->save_nblock+1) continue;
782 if (k1 != s->k0) { s->k0 = k1; continue; };
783
784 s->state_out_len = 2;
785 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
786 k1 ^= BZ_RAND_MASK; s->nblock_used++;
787 if (s->nblock_used == s->save_nblock+1) continue;
788 if (k1 != s->k0) { s->k0 = k1; continue; };
789
790 s->state_out_len = 3;
791 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
792 k1 ^= BZ_RAND_MASK; s->nblock_used++;
793 if (s->nblock_used == s->save_nblock+1) continue;
794 if (k1 != s->k0) { s->k0 = k1; continue; };
795
796 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
797 k1 ^= BZ_RAND_MASK; s->nblock_used++;
798 s->state_out_len = ((Int32)k1) + 4;
799 BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK;
800 s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
801 }
802
803 } else {
804
805 while (True) {
806 /* try to finish existing run */
807 while (True) {
808 if (s->strm->avail_out == 0) return False;
809 if (s->state_out_len == 0) break;
810 *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
811 BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
812 s->state_out_len--;
813 s->strm->next_out++;
814 s->strm->avail_out--;
815 s->strm->total_out_lo32++;
816 if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
817 }
818
819 /* can a new run be started? */
820 if (s->nblock_used == s->save_nblock+1) return False;
821
822 /* Only caused by corrupt data stream? */
823 if (s->nblock_used > s->save_nblock+1)
824 return True;
825
826 s->state_out_len = 1;
827 s->state_out_ch = s->k0;
828 BZ_GET_SMALL(k1); s->nblock_used++;
829 if (s->nblock_used == s->save_nblock+1) continue;
830 if (k1 != s->k0) { s->k0 = k1; continue; };
831
832 s->state_out_len = 2;
833 BZ_GET_SMALL(k1); s->nblock_used++;
834 if (s->nblock_used == s->save_nblock+1) continue;
835 if (k1 != s->k0) { s->k0 = k1; continue; };
836
837 s->state_out_len = 3;
838 BZ_GET_SMALL(k1); s->nblock_used++;
839 if (s->nblock_used == s->save_nblock+1) continue;
840 if (k1 != s->k0) { s->k0 = k1; continue; };
841
842 BZ_GET_SMALL(k1); s->nblock_used++;
843 s->state_out_len = ((Int32)k1) + 4;
844 BZ_GET_SMALL(s->k0); s->nblock_used++;
845 }
846
847 }
848}
849
850
851/*---------------------------------------------------*/
852int BZ_API(BZ2_bzDecompress) ( bz_stream *strm )
853{
854 Bool corrupt;
855 DState* s;
856 if (strm == NULL) return BZ_PARAM_ERROR;
857 s = strm->state;
858 if (s == NULL) return BZ_PARAM_ERROR;
859 if (s->strm != strm) return BZ_PARAM_ERROR;
860
861 while (True) {
862 if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR;
863 if (s->state == BZ_X_OUTPUT) {
864 if (s->smallDecompress)
865 corrupt = unRLE_obuf_to_output_SMALL ( s ); else
866 corrupt = unRLE_obuf_to_output_FAST ( s );
867 if (corrupt) return BZ_DATA_ERROR;
868 if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) {
869 BZ_FINALISE_CRC ( s->calculatedBlockCRC );
870 if (s->verbosity >= 3)
871 VPrintf2 ( " {0x%08x, 0x%08x}", s->storedBlockCRC,
872 s->calculatedBlockCRC );
873 if (s->verbosity >= 2) VPrintf0 ( "]" );
874 if (s->calculatedBlockCRC != s->storedBlockCRC)
875 return BZ_DATA_ERROR;
876 s->calculatedCombinedCRC
877 = (s->calculatedCombinedCRC << 1) |
878 (s->calculatedCombinedCRC >> 31);
879 s->calculatedCombinedCRC ^= s->calculatedBlockCRC;
880 s->state = BZ_X_BLKHDR_1;
881 } else {
882 return BZ_OK;
883 }
884 }
885 if (s->state >= BZ_X_MAGIC_1) {
886 Int32 r = BZ2_decompress ( s );
887 if (r == BZ_STREAM_END) {
888 if (s->verbosity >= 3)
889 VPrintf2 ( "\n combined CRCs: stored = 0x%08x, computed = 0x%08x",
890 s->storedCombinedCRC, s->calculatedCombinedCRC );
891 if (s->calculatedCombinedCRC != s->storedCombinedCRC)
892 return BZ_DATA_ERROR;
893 return r;
894 }
895 if (s->state != BZ_X_OUTPUT) return r;
896 }
897 }
898
899 AssertH ( 0, 6001 );
900
901 return 0; /*NOTREACHED*/
902}
903
904
905/*---------------------------------------------------*/
906int BZ_API(BZ2_bzDecompressEnd) ( bz_stream *strm )
907{
908 DState* s;
909 if (strm == NULL) return BZ_PARAM_ERROR;
910 s = strm->state;
911 if (s == NULL) return BZ_PARAM_ERROR;
912 if (s->strm != strm) return BZ_PARAM_ERROR;
913
914 if (s->tt != NULL) BZFREE(s->tt);
915 if (s->ll16 != NULL) BZFREE(s->ll16);
916 if (s->ll4 != NULL) BZFREE(s->ll4);
917
918 BZFREE(strm->state);
919 strm->state = NULL;
920
921 return BZ_OK;
922}
923
924
925#ifndef BZ_NO_STDIO
926/*---------------------------------------------------*/
927/*--- File I/O stuff ---*/
928/*---------------------------------------------------*/
929
930#define BZ_SETERR(eee) \
931{ \
932 if (bzerror != NULL) *bzerror = eee; \
933 if (bzf != NULL) bzf->lastErr = eee; \
934}
935
936typedef
937 struct {
938 FILE* handle;
939 Char buf[BZ_MAX_UNUSED];
940 Int32 bufN;
941 Bool writing;
942 bz_stream strm;
943 Int32 lastErr;
944 Bool initialisedOk;
945 }
946 bzFile;
947
948
949/*---------------------------------------------*/
950static Bool myfeof ( FILE* f )
951{
952 Int32 c = fgetc ( f );
953 if (c == EOF) return True;
954 ungetc ( c, f );
955 return False;
956}
957
958
959/*---------------------------------------------------*/
960BZFILE* BZ_API(BZ2_bzWriteOpen)
961 ( int* bzerror,
962 FILE* f,
963 int blockSize100k,
964 int verbosity,
965 int workFactor )
966{
967 Int32 ret;
968 bzFile* bzf = NULL;
969
970 BZ_SETERR(BZ_OK);
971
972 if (f == NULL ||
973 (blockSize100k < 1 || blockSize100k > 9) ||
974 (workFactor < 0 || workFactor > 250) ||
975 (verbosity < 0 || verbosity > 4))
976 { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
977
978 if (ferror(f))
979 { BZ_SETERR(BZ_IO_ERROR); return NULL; };
980
981 bzf = malloc ( sizeof(bzFile) );
982 if (bzf == NULL)
983 { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
984
985 BZ_SETERR(BZ_OK);
986 bzf->initialisedOk = False;
987 bzf->bufN = 0;
988 bzf->handle = f;
989 bzf->writing = True;
990 bzf->strm.bzalloc = NULL;
991 bzf->strm.bzfree = NULL;
992 bzf->strm.opaque = NULL;
993
994 if (workFactor == 0) workFactor = 30;
995 ret = BZ2_bzCompressInit ( &(bzf->strm), blockSize100k,
996 verbosity, workFactor );
997 if (ret != BZ_OK)
998 { BZ_SETERR(ret); free(bzf); return NULL; };
999
1000 bzf->strm.avail_in = 0;
1001 bzf->initialisedOk = True;
1002 return bzf;
1003}
1004
1005
1006
1007/*---------------------------------------------------*/
1008void BZ_API(BZ2_bzWrite)
1009 ( int* bzerror,
1010 BZFILE* b,
1011 void* buf,
1012 int len )
1013{
1014 Int32 n, n2, ret;
1015 bzFile* bzf = (bzFile*)b;
1016
1017 BZ_SETERR(BZ_OK);
1018 if (bzf == NULL || buf == NULL || len < 0)
1019 { BZ_SETERR(BZ_PARAM_ERROR); return; };
1020 if (!(bzf->writing))
1021 { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
1022 if (ferror(bzf->handle))
1023 { BZ_SETERR(BZ_IO_ERROR); return; };
1024
1025 if (len == 0)
1026 { BZ_SETERR(BZ_OK); return; };
1027
1028 bzf->strm.avail_in = len;
1029 bzf->strm.next_in = buf;
1030
1031 while (True) {
1032 bzf->strm.avail_out = BZ_MAX_UNUSED;
1033 bzf->strm.next_out = bzf->buf;
1034 ret = BZ2_bzCompress ( &(bzf->strm), BZ_RUN );
1035 if (ret != BZ_RUN_OK)
1036 { BZ_SETERR(ret); return; };
1037
1038 if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
1039 n = BZ_MAX_UNUSED - bzf->strm.avail_out;
1040 n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
1041 n, bzf->handle );
1042 if (n != n2 || ferror(bzf->handle))
1043 { BZ_SETERR(BZ_IO_ERROR); return; };
1044 }
1045
1046 if (bzf->strm.avail_in == 0)
1047 { BZ_SETERR(BZ_OK); return; };
1048 }
1049}
1050
1051
1052/*---------------------------------------------------*/
1053void BZ_API(BZ2_bzWriteClose)
1054 ( int* bzerror,
1055 BZFILE* b,
1056 int abandon,
1057 unsigned int* nbytes_in,
1058 unsigned int* nbytes_out )
1059{
1060 BZ2_bzWriteClose64 ( bzerror, b, abandon,
1061 nbytes_in, NULL, nbytes_out, NULL );
1062}
1063
1064
1065void BZ_API(BZ2_bzWriteClose64)
1066 ( int* bzerror,
1067 BZFILE* b,
1068 int abandon,
1069 unsigned int* nbytes_in_lo32,
1070 unsigned int* nbytes_in_hi32,
1071 unsigned int* nbytes_out_lo32,
1072 unsigned int* nbytes_out_hi32 )
1073{
1074 Int32 n, n2, ret;
1075 bzFile* bzf = (bzFile*)b;
1076
1077 if (bzf == NULL)
1078 { BZ_SETERR(BZ_OK); return; };
1079 if (!(bzf->writing))
1080 { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
1081 if (ferror(bzf->handle))
1082 { BZ_SETERR(BZ_IO_ERROR); return; };
1083
1084 if (nbytes_in_lo32 != NULL) *nbytes_in_lo32 = 0;
1085 if (nbytes_in_hi32 != NULL) *nbytes_in_hi32 = 0;
1086 if (nbytes_out_lo32 != NULL) *nbytes_out_lo32 = 0;
1087 if (nbytes_out_hi32 != NULL) *nbytes_out_hi32 = 0;
1088
1089 if ((!abandon) && bzf->lastErr == BZ_OK) {
1090 while (True) {
1091 bzf->strm.avail_out = BZ_MAX_UNUSED;
1092 bzf->strm.next_out = bzf->buf;
1093 ret = BZ2_bzCompress ( &(bzf->strm), BZ_FINISH );
1094 if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END)
1095 { BZ_SETERR(ret); return; };
1096
1097 if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
1098 n = BZ_MAX_UNUSED - bzf->strm.avail_out;
1099 n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
1100 n, bzf->handle );
1101 if (n != n2 || ferror(bzf->handle))
1102 { BZ_SETERR(BZ_IO_ERROR); return; };
1103 }
1104
1105 if (ret == BZ_STREAM_END) break;
1106 }
1107 }
1108
1109 if ( !abandon && !ferror ( bzf->handle ) ) {
1110 fflush ( bzf->handle );
1111 if (ferror(bzf->handle))
1112 { BZ_SETERR(BZ_IO_ERROR); return; };
1113 }
1114
1115 if (nbytes_in_lo32 != NULL)
1116 *nbytes_in_lo32 = bzf->strm.total_in_lo32;
1117 if (nbytes_in_hi32 != NULL)
1118 *nbytes_in_hi32 = bzf->strm.total_in_hi32;
1119 if (nbytes_out_lo32 != NULL)
1120 *nbytes_out_lo32 = bzf->strm.total_out_lo32;
1121 if (nbytes_out_hi32 != NULL)
1122 *nbytes_out_hi32 = bzf->strm.total_out_hi32;
1123
1124 BZ_SETERR(BZ_OK);
1125 BZ2_bzCompressEnd ( &(bzf->strm) );
1126 free ( bzf );
1127}
1128
1129
1130/*---------------------------------------------------*/
1131BZFILE* BZ_API(BZ2_bzReadOpen)
1132 ( int* bzerror,
1133 FILE* f,
1134 int verbosity,
1135 int small,
1136 void* unused,
1137 int nUnused )
1138{
1139 bzFile* bzf = NULL;
1140 int ret;
1141
1142 BZ_SETERR(BZ_OK);
1143
1144 if (f == NULL ||
1145 (small != 0 && small != 1) ||
1146 (verbosity < 0 || verbosity > 4) ||
1147 (unused == NULL && nUnused != 0) ||
1148 (unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED)))
1149 { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
1150
1151 if (ferror(f))
1152 { BZ_SETERR(BZ_IO_ERROR); return NULL; };
1153
1154 bzf = malloc ( sizeof(bzFile) );
1155 if (bzf == NULL)
1156 { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
1157
1158 BZ_SETERR(BZ_OK);
1159
1160 bzf->initialisedOk = False;
1161 bzf->handle = f;
1162 bzf->bufN = 0;
1163 bzf->writing = False;
1164 bzf->strm.bzalloc = NULL;
1165 bzf->strm.bzfree = NULL;
1166 bzf->strm.opaque = NULL;
1167
1168 while (nUnused > 0) {
1169 bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++;
1170 unused = ((void*)( 1 + ((UChar*)(unused)) ));
1171 nUnused--;
1172 }
1173
1174 ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small );
1175 if (ret != BZ_OK)
1176 { BZ_SETERR(ret); free(bzf); return NULL; };
1177
1178 bzf->strm.avail_in = bzf->bufN;
1179 bzf->strm.next_in = bzf->buf;
1180
1181 bzf->initialisedOk = True;
1182 return bzf;
1183}
1184
1185
1186/*---------------------------------------------------*/
1187void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b )
1188{
1189 bzFile* bzf = (bzFile*)b;
1190
1191 BZ_SETERR(BZ_OK);
1192 if (bzf == NULL)
1193 { BZ_SETERR(BZ_OK); return; };
1194
1195 if (bzf->writing)
1196 { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
1197
1198 if (bzf->initialisedOk)
1199 (void)BZ2_bzDecompressEnd ( &(bzf->strm) );
1200 free ( bzf );
1201}
1202
1203
1204/*---------------------------------------------------*/
1205int BZ_API(BZ2_bzRead)
1206 ( int* bzerror,
1207 BZFILE* b,
1208 void* buf,
1209 int len )
1210{
1211 Int32 n, ret;
1212 bzFile* bzf = (bzFile*)b;
1213
1214 BZ_SETERR(BZ_OK);
1215
1216 if (bzf == NULL || buf == NULL || len < 0)
1217 { BZ_SETERR(BZ_PARAM_ERROR); return 0; };
1218
1219 if (bzf->writing)
1220 { BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; };
1221
1222 if (len == 0)
1223 { BZ_SETERR(BZ_OK); return 0; };
1224
1225 bzf->strm.avail_out = len;
1226 bzf->strm.next_out = buf;
1227
1228 while (True) {
1229
1230 if (ferror(bzf->handle))
1231 { BZ_SETERR(BZ_IO_ERROR); return 0; };
1232
1233 if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) {
1234 n = fread ( bzf->buf, sizeof(UChar),
1235 BZ_MAX_UNUSED, bzf->handle );
1236 if (ferror(bzf->handle))
1237 { BZ_SETERR(BZ_IO_ERROR); return 0; };
1238 bzf->bufN = n;
1239 bzf->strm.avail_in = bzf->bufN;
1240 bzf->strm.next_in = bzf->buf;
1241 }
1242
1243 ret = BZ2_bzDecompress ( &(bzf->strm) );
1244
1245 if (ret != BZ_OK && ret != BZ_STREAM_END)
1246 { BZ_SETERR(ret); return 0; };
1247
1248 if (ret == BZ_OK && myfeof(bzf->handle) &&
1249 bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0)
1250 { BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; };
1251
1252 if (ret == BZ_STREAM_END)
1253 { BZ_SETERR(BZ_STREAM_END);
1254 return len - bzf->strm.avail_out; };
1255 if (bzf->strm.avail_out == 0)
1256 { BZ_SETERR(BZ_OK); return len; };
1257
1258 }
1259
1260 return 0; /*not reached*/
1261}
1262
1263
1264/*---------------------------------------------------*/
1265void BZ_API(BZ2_bzReadGetUnused)
1266 ( int* bzerror,
1267 BZFILE* b,
1268 void** unused,
1269 int* nUnused )
1270{
1271 bzFile* bzf = (bzFile*)b;
1272 if (bzf == NULL)
1273 { BZ_SETERR(BZ_PARAM_ERROR); return; };
1274 if (bzf->lastErr != BZ_STREAM_END)
1275 { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
1276 if (unused == NULL || nUnused == NULL)
1277 { BZ_SETERR(BZ_PARAM_ERROR); return; };
1278
1279 BZ_SETERR(BZ_OK);
1280 *nUnused = bzf->strm.avail_in;
1281 *unused = bzf->strm.next_in;
1282}
1283#endif
1284
1285
1286/*---------------------------------------------------*/
1287/*--- Misc convenience stuff ---*/
1288/*---------------------------------------------------*/
1289
1290/*---------------------------------------------------*/
1291int BZ_API(BZ2_bzBuffToBuffCompress)
1292 ( char* dest,
1293 unsigned int* destLen,
1294 char* source,
1295 unsigned int sourceLen,
1296 int blockSize100k,
1297 int verbosity,
1298 int workFactor )
1299{
1300 bz_stream strm;
1301 int ret;
1302
1303 if (dest == NULL || destLen == NULL ||
1304 source == NULL ||
1305 blockSize100k < 1 || blockSize100k > 9 ||
1306 verbosity < 0 || verbosity > 4 ||
1307 workFactor < 0 || workFactor > 250)
1308 return BZ_PARAM_ERROR;
1309
1310 if (workFactor == 0) workFactor = 30;
1311 strm.bzalloc = NULL;
1312 strm.bzfree = NULL;
1313 strm.opaque = NULL;
1314 ret = BZ2_bzCompressInit ( &strm, blockSize100k,
1315 verbosity, workFactor );
1316 if (ret != BZ_OK) return ret;
1317
1318 strm.next_in = source;
1319 strm.next_out = dest;
1320 strm.avail_in = sourceLen;
1321 strm.avail_out = *destLen;
1322
1323 ret = BZ2_bzCompress ( &strm, BZ_FINISH );
1324 if (ret == BZ_FINISH_OK) goto output_overflow;
1325 if (ret != BZ_STREAM_END) goto errhandler;
1326
1327 /* normal termination */
1328 *destLen -= strm.avail_out;
1329 BZ2_bzCompressEnd ( &strm );
1330 return BZ_OK;
1331
1332 output_overflow:
1333 BZ2_bzCompressEnd ( &strm );
1334 return BZ_OUTBUFF_FULL;
1335
1336 errhandler:
1337 BZ2_bzCompressEnd ( &strm );
1338 return ret;
1339}
1340
1341
1342/*---------------------------------------------------*/
1343int BZ_API(BZ2_bzBuffToBuffDecompress)
1344 ( char* dest,
1345 unsigned int* destLen,
1346 char* source,
1347 unsigned int sourceLen,
1348 int small,
1349 int verbosity )
1350{
1351 bz_stream strm;
1352 int ret;
1353
1354 if (dest == NULL || destLen == NULL ||
1355 source == NULL ||
1356 (small != 0 && small != 1) ||
1357 verbosity < 0 || verbosity > 4)
1358 return BZ_PARAM_ERROR;
1359
1360 strm.bzalloc = NULL;
1361 strm.bzfree = NULL;
1362 strm.opaque = NULL;
1363 ret = BZ2_bzDecompressInit ( &strm, verbosity, small );
1364 if (ret != BZ_OK) return ret;
1365
1366 strm.next_in = source;
1367 strm.next_out = dest;
1368 strm.avail_in = sourceLen;
1369 strm.avail_out = *destLen;
1370
1371 ret = BZ2_bzDecompress ( &strm );
1372 if (ret == BZ_OK) goto output_overflow_or_eof;
1373 if (ret != BZ_STREAM_END) goto errhandler;
1374
1375 /* normal termination */
1376 *destLen -= strm.avail_out;
1377 BZ2_bzDecompressEnd ( &strm );
1378 return BZ_OK;
1379
1380 output_overflow_or_eof:
1381 if (strm.avail_out > 0) {
1382 BZ2_bzDecompressEnd ( &strm );
1383 return BZ_UNEXPECTED_EOF;
1384 } else {
1385 BZ2_bzDecompressEnd ( &strm );
1386 return BZ_OUTBUFF_FULL;
1387 };
1388
1389 errhandler:
1390 BZ2_bzDecompressEnd ( &strm );
1391 return ret;
1392}
1393
1394
1395/*---------------------------------------------------*/
1396/*--
1397 Code contributed by Yoshioka Tsuneo
1398 (QWF00133@niftyserve.or.jp/tsuneo-y@is.aist-nara.ac.jp),
1399 to support better zlib compatibility.
1400 This code is not _officially_ part of libbzip2 (yet);
1401 I haven't tested it, documented it, or considered the
1402 threading-safeness of it.
1403 If this code breaks, please contact both Yoshioka and me.
1404--*/
1405/*---------------------------------------------------*/
1406
1407/*---------------------------------------------------*/
1408/*--
1409 return version like "0.9.0c".
1410--*/
1411const char * BZ_API(BZ2_bzlibVersion)(void)
1412{
1413 return BZ_VERSION;
1414}
1415
1416
1417#ifndef BZ_NO_STDIO
1418/*---------------------------------------------------*/
1419
1420#if defined(_WIN32) || defined(OS2) || defined(MSDOS)
1421# include <fcntl.h>
1422# include <io.h>
1423# define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY)
1424#else
1425# define SET_BINARY_MODE(file)
1426#endif
1427static
1428BZFILE * bzopen_or_bzdopen
1429 ( const char *path, /* no use when bzdopen */
1430 int fd, /* no use when bzdopen */
1431 const char *mode,
1432 int open_mode) /* bzopen: 0, bzdopen:1 */
1433{
1434 int bzerr;
1435 char unused[BZ_MAX_UNUSED];
1436 int blockSize100k = 9;
1437 int writing = 0;
1438 char mode2[10] = "";
1439 FILE *fp = NULL;
1440 BZFILE *bzfp = NULL;
1441 int verbosity = 0;
1442 int workFactor = 30;
1443 int smallMode = 0;
1444 int nUnused = 0;
1445
1446 if (mode == NULL) return NULL;
1447 while (*mode) {
1448 switch (*mode) {
1449 case 'r':
1450 writing = 0; break;
1451 case 'w':
1452 writing = 1; break;
1453 case 's':
1454 smallMode = 1; break;
1455 default:
1456 if (isdigit((int)(*mode))) {
1457 blockSize100k = *mode-BZ_HDR_0;
1458 }
1459 }
1460 mode++;
1461 }
1462 strcat(mode2, writing ? "w" : "r" );
1463 strcat(mode2,"b"); /* binary mode */
1464
1465 if (open_mode==0) {
1466 if (path==NULL || strcmp(path,"")==0) {
1467 fp = (writing ? stdout : stdin);
1468 SET_BINARY_MODE(fp);
1469 } else {
1470 fp = fopen(path,mode2);
1471 }
1472 } else {
1473#ifdef BZ_STRICT_ANSI
1474 fp = NULL;
1475#else
1476 fp = fdopen(fd,mode2);
1477#endif
1478 }
1479 if (fp == NULL) return NULL;
1480
1481 if (writing) {
1482 /* Guard against total chaos and anarchy -- JRS */
1483 if (blockSize100k < 1) blockSize100k = 1;
1484 if (blockSize100k > 9) blockSize100k = 9;
1485 bzfp = BZ2_bzWriteOpen(&bzerr,fp,blockSize100k,
1486 verbosity,workFactor);
1487 } else {
1488 bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode,
1489 unused,nUnused);
1490 }
1491 if (bzfp == NULL) {
1492 if (fp != stdin && fp != stdout) fclose(fp);
1493 return NULL;
1494 }
1495 return bzfp;
1496}
1497
1498
1499/*---------------------------------------------------*/
1500/*--
1501 open file for read or write.
1502 ex) bzopen("file","w9")
1503 case path="" or NULL => use stdin or stdout.
1504--*/
1505BZFILE * BZ_API(BZ2_bzopen)
1506 ( const char *path,
1507 const char *mode )
1508{
1509 return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
1510}
1511
1512
1513/*---------------------------------------------------*/
1514BZFILE * BZ_API(BZ2_bzdopen)
1515 ( int fd,
1516 const char *mode )
1517{
1518 return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
1519}
1520
1521
1522/*---------------------------------------------------*/
1523int BZ_API(BZ2_bzread) (BZFILE* b, void* buf, int len )
1524{
1525 int bzerr, nread;
1526 if (((bzFile*)b)->lastErr == BZ_STREAM_END) return 0;
1527 nread = BZ2_bzRead(&bzerr,b,buf,len);
1528 if (bzerr == BZ_OK || bzerr == BZ_STREAM_END) {
1529 return nread;
1530 } else {
1531 return -1;
1532 }
1533}
1534
1535
1536/*---------------------------------------------------*/
1537int BZ_API(BZ2_bzwrite) (BZFILE* b, void* buf, int len )
1538{
1539 int bzerr;
1540
1541 BZ2_bzWrite(&bzerr,b,buf,len);
1542 if(bzerr == BZ_OK){
1543 return len;
1544 }else{
1545 return -1;
1546 }
1547}
1548
1549
1550/*---------------------------------------------------*/
1551int BZ_API(BZ2_bzflush) (BZFILE *b)
1552{
1553 /* do nothing now... */
1554 return 0;
1555}
1556
1557
1558/*---------------------------------------------------*/
1559void BZ_API(BZ2_bzclose) (BZFILE* b)
1560{
1561 int bzerr;
1562 FILE *fp = ((bzFile *)b)->handle;
1563
1564 if (b==NULL) {return;}
1565 if(((bzFile*)b)->writing){
1566 BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL);
1567 if(bzerr != BZ_OK){
1568 BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
1569 }
1570 }else{
1571 BZ2_bzReadClose(&bzerr,b);
1572 }
1573 if(fp!=stdin && fp!=stdout){
1574 fclose(fp);
1575 }
1576}
1577
1578
1579/*---------------------------------------------------*/
1580/*--
1581 return last error code
1582--*/
1583static char *bzerrorstrings[] = {
1584 "OK"
1585 ,"SEQUENCE_ERROR"
1586 ,"PARAM_ERROR"
1587 ,"MEM_ERROR"
1588 ,"DATA_ERROR"
1589 ,"DATA_ERROR_MAGIC"
1590 ,"IO_ERROR"
1591 ,"UNEXPECTED_EOF"
1592 ,"OUTBUFF_FULL"
1593 ,"CONFIG_ERROR"
1594 ,"???" /* for future */
1595 ,"???" /* for future */
1596 ,"???" /* for future */
1597 ,"???" /* for future */
1598 ,"???" /* for future */
1599 ,"???" /* for future */
1600};
1601
1602
1603const char * BZ_API(BZ2_bzerror) (BZFILE *b, int *errnum)
1604{
1605 int err = ((bzFile *)b)->lastErr;
1606
1607 if(err>0) err = 0;
1608 *errnum = err;
1609 return bzerrorstrings[err*-1];
1610}
1611#endif
1612
1613
1614/*-------------------------------------------------------------*/
1615/*--- end bzlib.c ---*/
1616/*-------------------------------------------------------------*/
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