1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE Ogg CONTAINER SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: packing variable sized words into an octet stream
14 last mod: $Id: bitwise.c 16993 2010-03-21 23:15:46Z xiphmont $
15
16 ********************************************************************/
17
18 /* We're 'LSb' endian; if we write a word but read individual bits,
19 then we'll read the lsb first */
20
21 #include <string.h>
22 #include <stdlib.h>
23 #include <ogg/ogg.h>
24
25 #define BUFFER_INCREMENT 256
26
27 static const unsigned long mask[]=
28 {0x00000000,0x00000001,0x00000003,0x00000007,0x0000000f,
29 0x0000001f,0x0000003f,0x0000007f,0x000000ff,0x000001ff,
30 0x000003ff,0x000007ff,0x00000fff,0x00001fff,0x00003fff,
31 0x00007fff,0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,
32 0x000fffff,0x001fffff,0x003fffff,0x007fffff,0x00ffffff,
33 0x01ffffff,0x03ffffff,0x07ffffff,0x0fffffff,0x1fffffff,
34 0x3fffffff,0x7fffffff,0xffffffff };
35
36 static const unsigned int mask8B[]=
37 {0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff};
38
oggpack_writeinit(oggpack_buffer * b)39 void oggpack_writeinit(oggpack_buffer *b){
40 memset(b,0,sizeof(*b));
41 b->ptr=b->buffer=_ogg_malloc(BUFFER_INCREMENT);
42 b->buffer[0]='\0';
43 b->storage=BUFFER_INCREMENT;
44 }
45
oggpackB_writeinit(oggpack_buffer * b)46 void oggpackB_writeinit(oggpack_buffer *b){
47 oggpack_writeinit(b);
48 }
49
oggpack_writecheck(oggpack_buffer * b)50 int oggpack_writecheck(oggpack_buffer *b){
51 if(!b->ptr || !b->storage)return -1;
52 return 0;
53 }
54
oggpackB_writecheck(oggpack_buffer * b)55 int oggpackB_writecheck(oggpack_buffer *b){
56 return oggpack_writecheck(b);
57 }
58
oggpack_writetrunc(oggpack_buffer * b,long bits)59 void oggpack_writetrunc(oggpack_buffer *b,long bits){
60 long bytes=bits>>3;
61 if(b->ptr){
62 bits-=bytes*8;
63 b->ptr=b->buffer+bytes;
64 b->endbit=bits;
65 b->endbyte=bytes;
66 *b->ptr&=mask[bits];
67 }
68 }
69
oggpackB_writetrunc(oggpack_buffer * b,long bits)70 void oggpackB_writetrunc(oggpack_buffer *b,long bits){
71 long bytes=bits>>3;
72 if(b->ptr){
73 bits-=bytes*8;
74 b->ptr=b->buffer+bytes;
75 b->endbit=bits;
76 b->endbyte=bytes;
77 *b->ptr&=mask8B[bits];
78 }
79 }
80
81 /* Takes only up to 32 bits. */
oggpack_write(oggpack_buffer * b,unsigned long value,int bits)82 void oggpack_write(oggpack_buffer *b,unsigned long value,int bits){
83 if(b->endbyte+4>=b->storage){
84 void *ret;
85 if(!b->ptr)return;
86 ret=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);
87 if(!ret){
88 oggpack_writeclear(b);
89 return;
90 }
91 b->buffer=ret;
92 b->storage+=BUFFER_INCREMENT;
93 b->ptr=b->buffer+b->endbyte;
94 }
95
96 value&=mask[bits];
97 bits+=b->endbit;
98
99 b->ptr[0]|=value<<b->endbit;
100
101 if(bits>=8){
102 b->ptr[1]=(unsigned char)(value>>(8-b->endbit));
103 if(bits>=16){
104 b->ptr[2]=(unsigned char)(value>>(16-b->endbit));
105 if(bits>=24){
106 b->ptr[3]=(unsigned char)(value>>(24-b->endbit));
107 if(bits>=32){
108 if(b->endbit)
109 b->ptr[4]=(unsigned char)(value>>(32-b->endbit));
110 else
111 b->ptr[4]=0;
112 }
113 }
114 }
115 }
116
117 b->endbyte+=bits/8;
118 b->ptr+=bits/8;
119 b->endbit=bits&7;
120 }
121
122 /* Takes only up to 32 bits. */
oggpackB_write(oggpack_buffer * b,unsigned long value,int bits)123 void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits){
124 if(b->endbyte+4>=b->storage){
125 void *ret;
126 if(!b->ptr)return;
127 ret=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);
128 if(!ret){
129 oggpack_writeclear(b);
130 return;
131 }
132 b->buffer=ret;
133 b->storage+=BUFFER_INCREMENT;
134 b->ptr=b->buffer+b->endbyte;
135 }
136
137 value=(value&mask[bits])<<(32-bits);
138 bits+=b->endbit;
139
140 b->ptr[0]|=value>>(24+b->endbit);
141
142 if(bits>=8){
143 b->ptr[1]=(unsigned char)(value>>(16+b->endbit));
144 if(bits>=16){
145 b->ptr[2]=(unsigned char)(value>>(8+b->endbit));
146 if(bits>=24){
147 b->ptr[3]=(unsigned char)(value>>(b->endbit));
148 if(bits>=32){
149 if(b->endbit)
150 b->ptr[4]=(unsigned char)(value<<(8-b->endbit));
151 else
152 b->ptr[4]=0;
153 }
154 }
155 }
156 }
157
158 b->endbyte+=bits/8;
159 b->ptr+=bits/8;
160 b->endbit=bits&7;
161 }
162
oggpack_writealign(oggpack_buffer * b)163 void oggpack_writealign(oggpack_buffer *b){
164 int bits=8-b->endbit;
165 if(bits<8)
166 oggpack_write(b,0,bits);
167 }
168
oggpackB_writealign(oggpack_buffer * b)169 void oggpackB_writealign(oggpack_buffer *b){
170 int bits=8-b->endbit;
171 if(bits<8)
172 oggpackB_write(b,0,bits);
173 }
174
oggpack_writecopy_helper(oggpack_buffer * b,void * source,long bits,void (* w)(oggpack_buffer *,unsigned long,int),int msb)175 static void oggpack_writecopy_helper(oggpack_buffer *b,
176 void *source,
177 long bits,
178 void (*w)(oggpack_buffer *,
179 unsigned long,
180 int),
181 int msb){
182 unsigned char *ptr=(unsigned char *)source;
183
184 long bytes=bits/8;
185 bits-=bytes*8;
186
187 if(b->endbit){
188 int i;
189 /* unaligned copy. Do it the hard way. */
190 for(i=0;i<bytes;i++)
191 w(b,(unsigned long)(ptr[i]),8);
192 }else{
193 /* aligned block copy */
194 if(b->endbyte+bytes+1>=b->storage){
195 void *ret;
196 if(!b->ptr)return;
197 b->storage=b->endbyte+bytes+BUFFER_INCREMENT;
198 ret=_ogg_realloc(b->buffer,b->storage);
199 if(!ret){
200 oggpack_writeclear(b);
201 return;
202 }
203 b->buffer=ret;
204 b->ptr=b->buffer+b->endbyte;
205 }
206
207 memmove(b->ptr,source,bytes);
208 b->ptr+=bytes;
209 b->endbyte+=bytes;
210 *b->ptr=0;
211
212 }
213 if(bits){
214 if(msb)
215 w(b,(unsigned long)(ptr[bytes]>>(8-bits)),bits);
216 else
217 w(b,(unsigned long)(ptr[bytes]),bits);
218 }
219 }
220
oggpack_writecopy(oggpack_buffer * b,void * source,long bits)221 void oggpack_writecopy(oggpack_buffer *b,void *source,long bits){
222 oggpack_writecopy_helper(b,source,bits,oggpack_write,0);
223 }
224
oggpackB_writecopy(oggpack_buffer * b,void * source,long bits)225 void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits){
226 oggpack_writecopy_helper(b,source,bits,oggpackB_write,1);
227 }
228
oggpack_reset(oggpack_buffer * b)229 void oggpack_reset(oggpack_buffer *b){
230 if(!b->ptr)return;
231 b->ptr=b->buffer;
232 b->buffer[0]=0;
233 b->endbit=b->endbyte=0;
234 }
235
oggpackB_reset(oggpack_buffer * b)236 void oggpackB_reset(oggpack_buffer *b){
237 oggpack_reset(b);
238 }
239
oggpack_writeclear(oggpack_buffer * b)240 void oggpack_writeclear(oggpack_buffer *b){
241 if(b->buffer)_ogg_free(b->buffer);
242 memset(b,0,sizeof(*b));
243 }
244
oggpackB_writeclear(oggpack_buffer * b)245 void oggpackB_writeclear(oggpack_buffer *b){
246 oggpack_writeclear(b);
247 }
248
oggpack_readinit(oggpack_buffer * b,unsigned char * buf,int bytes)249 void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
250 memset(b,0,sizeof(*b));
251 b->buffer=b->ptr=buf;
252 b->storage=bytes;
253 }
254
oggpackB_readinit(oggpack_buffer * b,unsigned char * buf,int bytes)255 void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
256 oggpack_readinit(b,buf,bytes);
257 }
258
259 /* Read in bits without advancing the bitptr; bits <= 32 */
oggpack_look(oggpack_buffer * b,int bits)260 long oggpack_look(oggpack_buffer *b,int bits){
261 unsigned long ret;
262 unsigned long m=mask[bits];
263
264 bits+=b->endbit;
265
266 if(b->endbyte+4>=b->storage){
267 /* not the main path */
268 if(b->endbyte*8+bits>b->storage*8)return(-1);
269 }
270
271 ret=b->ptr[0]>>b->endbit;
272 if(bits>8){
273 ret|=b->ptr[1]<<(8-b->endbit);
274 if(bits>16){
275 ret|=b->ptr[2]<<(16-b->endbit);
276 if(bits>24){
277 ret|=b->ptr[3]<<(24-b->endbit);
278 if(bits>32 && b->endbit)
279 ret|=b->ptr[4]<<(32-b->endbit);
280 }
281 }
282 }
283 return(m&ret);
284 }
285
286 /* Read in bits without advancing the bitptr; bits <= 32 */
oggpackB_look(oggpack_buffer * b,int bits)287 long oggpackB_look(oggpack_buffer *b,int bits){
288 unsigned long ret;
289 int m=32-bits;
290
291 bits+=b->endbit;
292
293 if(b->endbyte+4>=b->storage){
294 /* not the main path */
295 if(b->endbyte*8+bits>b->storage*8)return(-1);
296 }
297
298 ret=b->ptr[0]<<(24+b->endbit);
299 if(bits>8){
300 ret|=b->ptr[1]<<(16+b->endbit);
301 if(bits>16){
302 ret|=b->ptr[2]<<(8+b->endbit);
303 if(bits>24){
304 ret|=b->ptr[3]<<(b->endbit);
305 if(bits>32 && b->endbit)
306 ret|=b->ptr[4]>>(8-b->endbit);
307 }
308 }
309 }
310 return ((ret&0xffffffff)>>(m>>1))>>((m+1)>>1);
311 }
312
oggpack_look1(oggpack_buffer * b)313 long oggpack_look1(oggpack_buffer *b){
314 if(b->endbyte>=b->storage)return(-1);
315 return((b->ptr[0]>>b->endbit)&1);
316 }
317
oggpackB_look1(oggpack_buffer * b)318 long oggpackB_look1(oggpack_buffer *b){
319 if(b->endbyte>=b->storage)return(-1);
320 return((b->ptr[0]>>(7-b->endbit))&1);
321 }
322
oggpack_adv(oggpack_buffer * b,int bits)323 void oggpack_adv(oggpack_buffer *b,int bits){
324 bits+=b->endbit;
325 b->ptr+=bits/8;
326 b->endbyte+=bits/8;
327 b->endbit=bits&7;
328 }
329
oggpackB_adv(oggpack_buffer * b,int bits)330 void oggpackB_adv(oggpack_buffer *b,int bits){
331 oggpack_adv(b,bits);
332 }
333
oggpack_adv1(oggpack_buffer * b)334 void oggpack_adv1(oggpack_buffer *b){
335 if(++(b->endbit)>7){
336 b->endbit=0;
337 b->ptr++;
338 b->endbyte++;
339 }
340 }
341
oggpackB_adv1(oggpack_buffer * b)342 void oggpackB_adv1(oggpack_buffer *b){
343 oggpack_adv1(b);
344 }
345
346 /* bits <= 32 */
oggpack_read(oggpack_buffer * b,int bits)347 long oggpack_read(oggpack_buffer *b,int bits){
348 long ret;
349 unsigned long m=mask[bits];
350
351 bits+=b->endbit;
352
353 if(b->endbyte+4>=b->storage){
354 /* not the main path */
355 ret=-1L;
356 if(b->endbyte*8+bits>b->storage*8)goto overflow;
357 }
358
359 ret=b->ptr[0]>>b->endbit;
360 if(bits>8){
361 ret|=b->ptr[1]<<(8-b->endbit);
362 if(bits>16){
363 ret|=b->ptr[2]<<(16-b->endbit);
364 if(bits>24){
365 ret|=b->ptr[3]<<(24-b->endbit);
366 if(bits>32 && b->endbit){
367 ret|=b->ptr[4]<<(32-b->endbit);
368 }
369 }
370 }
371 }
372 ret&=m;
373
374 overflow:
375
376 b->ptr+=bits/8;
377 b->endbyte+=bits/8;
378 b->endbit=bits&7;
379 return(ret);
380 }
381
382 /* bits <= 32 */
oggpackB_read(oggpack_buffer * b,int bits)383 long oggpackB_read(oggpack_buffer *b,int bits){
384 long ret;
385 long m=32-bits;
386
387 bits+=b->endbit;
388
389 if(b->endbyte+4>=b->storage){
390 /* not the main path */
391 ret=-1L;
392 if(b->endbyte*8+bits>b->storage*8)goto overflow;
393 /* special case to avoid reading b->ptr[0], which might be past the end of
394 the buffer; also skips some useless accounting */
395 else if(!bits)return(0L);
396 }
397
398 ret=b->ptr[0]<<(24+b->endbit);
399 if(bits>8){
400 ret|=b->ptr[1]<<(16+b->endbit);
401 if(bits>16){
402 ret|=b->ptr[2]<<(8+b->endbit);
403 if(bits>24){
404 ret|=b->ptr[3]<<(b->endbit);
405 if(bits>32 && b->endbit)
406 ret|=b->ptr[4]>>(8-b->endbit);
407 }
408 }
409 }
410 ret=((ret&0xffffffffUL)>>(m>>1))>>((m+1)>>1);
411
412 overflow:
413
414 b->ptr+=bits/8;
415 b->endbyte+=bits/8;
416 b->endbit=bits&7;
417 return(ret);
418 }
419
oggpack_read1(oggpack_buffer * b)420 long oggpack_read1(oggpack_buffer *b){
421 long ret;
422
423 if(b->endbyte>=b->storage){
424 /* not the main path */
425 ret=-1L;
426 goto overflow;
427 }
428
429 ret=(b->ptr[0]>>b->endbit)&1;
430
431 overflow:
432
433 b->endbit++;
434 if(b->endbit>7){
435 b->endbit=0;
436 b->ptr++;
437 b->endbyte++;
438 }
439 return(ret);
440 }
441
oggpackB_read1(oggpack_buffer * b)442 long oggpackB_read1(oggpack_buffer *b){
443 long ret;
444
445 if(b->endbyte>=b->storage){
446 /* not the main path */
447 ret=-1L;
448 goto overflow;
449 }
450
451 ret=(b->ptr[0]>>(7-b->endbit))&1;
452
453 overflow:
454
455 b->endbit++;
456 if(b->endbit>7){
457 b->endbit=0;
458 b->ptr++;
459 b->endbyte++;
460 }
461 return(ret);
462 }
463
oggpack_bytes(oggpack_buffer * b)464 long oggpack_bytes(oggpack_buffer *b){
465 return(b->endbyte+(b->endbit+7)/8);
466 }
467
oggpack_bits(oggpack_buffer * b)468 long oggpack_bits(oggpack_buffer *b){
469 return(b->endbyte*8+b->endbit);
470 }
471
oggpackB_bytes(oggpack_buffer * b)472 long oggpackB_bytes(oggpack_buffer *b){
473 return oggpack_bytes(b);
474 }
475
oggpackB_bits(oggpack_buffer * b)476 long oggpackB_bits(oggpack_buffer *b){
477 return oggpack_bits(b);
478 }
479
oggpack_get_buffer(oggpack_buffer * b)480 unsigned char *oggpack_get_buffer(oggpack_buffer *b){
481 return(b->buffer);
482 }
483
oggpackB_get_buffer(oggpack_buffer * b)484 unsigned char *oggpackB_get_buffer(oggpack_buffer *b){
485 return oggpack_get_buffer(b);
486 }
487
488 /* Self test of the bitwise routines; everything else is based on
489 them, so they damned well better be solid. */
490
491 #ifdef _V_SELFTEST
492 #include <stdio.h>
493
ilog(unsigned int v)494 static int ilog(unsigned int v){
495 int ret=0;
496 while(v){
497 ret++;
498 v>>=1;
499 }
500 return(ret);
501 }
502
503 oggpack_buffer o;
504 oggpack_buffer r;
505
report(char * in)506 void report(char *in){
507 fprintf(stderr,"%s",in);
508 exit(1);
509 }
510
cliptest(unsigned long * b,int vals,int bits,int * comp,int compsize)511 void cliptest(unsigned long *b,int vals,int bits,int *comp,int compsize){
512 long bytes,i;
513 unsigned char *buffer;
514
515 oggpack_reset(&o);
516 for(i=0;i<vals;i++)
517 oggpack_write(&o,b[i],bits?bits:ilog(b[i]));
518 buffer=oggpack_get_buffer(&o);
519 bytes=oggpack_bytes(&o);
520 if(bytes!=compsize)report("wrong number of bytes!\n");
521 for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){
522 for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);
523 report("wrote incorrect value!\n");
524 }
525 oggpack_readinit(&r,buffer,bytes);
526 for(i=0;i<vals;i++){
527 int tbit=bits?bits:ilog(b[i]);
528 if(oggpack_look(&r,tbit)==-1)
529 report("out of data!\n");
530 if(oggpack_look(&r,tbit)!=(b[i]&mask[tbit]))
531 report("looked at incorrect value!\n");
532 if(tbit==1)
533 if(oggpack_look1(&r)!=(b[i]&mask[tbit]))
534 report("looked at single bit incorrect value!\n");
535 if(tbit==1){
536 if(oggpack_read1(&r)!=(b[i]&mask[tbit]))
537 report("read incorrect single bit value!\n");
538 }else{
539 if(oggpack_read(&r,tbit)!=(b[i]&mask[tbit]))
540 report("read incorrect value!\n");
541 }
542 }
543 if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");
544 }
545
cliptestB(unsigned long * b,int vals,int bits,int * comp,int compsize)546 void cliptestB(unsigned long *b,int vals,int bits,int *comp,int compsize){
547 long bytes,i;
548 unsigned char *buffer;
549
550 oggpackB_reset(&o);
551 for(i=0;i<vals;i++)
552 oggpackB_write(&o,b[i],bits?bits:ilog(b[i]));
553 buffer=oggpackB_get_buffer(&o);
554 bytes=oggpackB_bytes(&o);
555 if(bytes!=compsize)report("wrong number of bytes!\n");
556 for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){
557 for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);
558 report("wrote incorrect value!\n");
559 }
560 oggpackB_readinit(&r,buffer,bytes);
561 for(i=0;i<vals;i++){
562 int tbit=bits?bits:ilog(b[i]);
563 if(oggpackB_look(&r,tbit)==-1)
564 report("out of data!\n");
565 if(oggpackB_look(&r,tbit)!=(b[i]&mask[tbit]))
566 report("looked at incorrect value!\n");
567 if(tbit==1)
568 if(oggpackB_look1(&r)!=(b[i]&mask[tbit]))
569 report("looked at single bit incorrect value!\n");
570 if(tbit==1){
571 if(oggpackB_read1(&r)!=(b[i]&mask[tbit]))
572 report("read incorrect single bit value!\n");
573 }else{
574 if(oggpackB_read(&r,tbit)!=(b[i]&mask[tbit]))
575 report("read incorrect value!\n");
576 }
577 }
578 if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");
579 }
580
main(void)581 int main(void){
582 unsigned char *buffer;
583 long bytes,i;
584 static unsigned long testbuffer1[]=
585 {18,12,103948,4325,543,76,432,52,3,65,4,56,32,42,34,21,1,23,32,546,456,7,
586 567,56,8,8,55,3,52,342,341,4,265,7,67,86,2199,21,7,1,5,1,4};
587 int test1size=43;
588
589 static unsigned long testbuffer2[]=
590 {216531625L,1237861823,56732452,131,3212421,12325343,34547562,12313212,
591 1233432,534,5,346435231,14436467,7869299,76326614,167548585,
592 85525151,0,12321,1,349528352};
593 int test2size=21;
594
595 static unsigned long testbuffer3[]=
596 {1,0,14,0,1,0,12,0,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,1,1,1,1,0,0,1,
597 0,1,30,1,1,1,0,0,1,0,0,0,12,0,11,0,1,0,0,1};
598 int test3size=56;
599
600 static unsigned long large[]=
601 {2136531625L,2137861823,56732452,131,3212421,12325343,34547562,12313212,
602 1233432,534,5,2146435231,14436467,7869299,76326614,167548585,
603 85525151,0,12321,1,2146528352};
604
605 int onesize=33;
606 static int one[33]={146,25,44,151,195,15,153,176,233,131,196,65,85,172,47,40,
607 34,242,223,136,35,222,211,86,171,50,225,135,214,75,172,
608 223,4};
609 static int oneB[33]={150,101,131,33,203,15,204,216,105,193,156,65,84,85,222,
610 8,139,145,227,126,34,55,244,171,85,100,39,195,173,18,
611 245,251,128};
612
613 int twosize=6;
614 static int two[6]={61,255,255,251,231,29};
615 static int twoB[6]={247,63,255,253,249,120};
616
617 int threesize=54;
618 static int three[54]={169,2,232,252,91,132,156,36,89,13,123,176,144,32,254,
619 142,224,85,59,121,144,79,124,23,67,90,90,216,79,23,83,
620 58,135,196,61,55,129,183,54,101,100,170,37,127,126,10,
621 100,52,4,14,18,86,77,1};
622 static int threeB[54]={206,128,42,153,57,8,183,251,13,89,36,30,32,144,183,
623 130,59,240,121,59,85,223,19,228,180,134,33,107,74,98,
624 233,253,196,135,63,2,110,114,50,155,90,127,37,170,104,
625 200,20,254,4,58,106,176,144,0};
626
627 int foursize=38;
628 static int four[38]={18,6,163,252,97,194,104,131,32,1,7,82,137,42,129,11,72,
629 132,60,220,112,8,196,109,64,179,86,9,137,195,208,122,169,
630 28,2,133,0,1};
631 static int fourB[38]={36,48,102,83,243,24,52,7,4,35,132,10,145,21,2,93,2,41,
632 1,219,184,16,33,184,54,149,170,132,18,30,29,98,229,67,
633 129,10,4,32};
634
635 int fivesize=45;
636 static int five[45]={169,2,126,139,144,172,30,4,80,72,240,59,130,218,73,62,
637 241,24,210,44,4,20,0,248,116,49,135,100,110,130,181,169,
638 84,75,159,2,1,0,132,192,8,0,0,18,22};
639 static int fiveB[45]={1,84,145,111,245,100,128,8,56,36,40,71,126,78,213,226,
640 124,105,12,0,133,128,0,162,233,242,67,152,77,205,77,
641 172,150,169,129,79,128,0,6,4,32,0,27,9,0};
642
643 int sixsize=7;
644 static int six[7]={17,177,170,242,169,19,148};
645 static int sixB[7]={136,141,85,79,149,200,41};
646
647 /* Test read/write together */
648 /* Later we test against pregenerated bitstreams */
649 oggpack_writeinit(&o);
650
651 fprintf(stderr,"\nSmall preclipped packing (LSb): ");
652 cliptest(testbuffer1,test1size,0,one,onesize);
653 fprintf(stderr,"ok.");
654
655 fprintf(stderr,"\nNull bit call (LSb): ");
656 cliptest(testbuffer3,test3size,0,two,twosize);
657 fprintf(stderr,"ok.");
658
659 fprintf(stderr,"\nLarge preclipped packing (LSb): ");
660 cliptest(testbuffer2,test2size,0,three,threesize);
661 fprintf(stderr,"ok.");
662
663 fprintf(stderr,"\n32 bit preclipped packing (LSb): ");
664 oggpack_reset(&o);
665 for(i=0;i<test2size;i++)
666 oggpack_write(&o,large[i],32);
667 buffer=oggpack_get_buffer(&o);
668 bytes=oggpack_bytes(&o);
669 oggpack_readinit(&r,buffer,bytes);
670 for(i=0;i<test2size;i++){
671 if(oggpack_look(&r,32)==-1)report("out of data. failed!");
672 if(oggpack_look(&r,32)!=large[i]){
673 fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpack_look(&r,32),large[i],
674 oggpack_look(&r,32),large[i]);
675 report("read incorrect value!\n");
676 }
677 oggpack_adv(&r,32);
678 }
679 if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");
680 fprintf(stderr,"ok.");
681
682 fprintf(stderr,"\nSmall unclipped packing (LSb): ");
683 cliptest(testbuffer1,test1size,7,four,foursize);
684 fprintf(stderr,"ok.");
685
686 fprintf(stderr,"\nLarge unclipped packing (LSb): ");
687 cliptest(testbuffer2,test2size,17,five,fivesize);
688 fprintf(stderr,"ok.");
689
690 fprintf(stderr,"\nSingle bit unclipped packing (LSb): ");
691 cliptest(testbuffer3,test3size,1,six,sixsize);
692 fprintf(stderr,"ok.");
693
694 fprintf(stderr,"\nTesting read past end (LSb): ");
695 oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);
696 for(i=0;i<64;i++){
697 if(oggpack_read(&r,1)!=0){
698 fprintf(stderr,"failed; got -1 prematurely.\n");
699 exit(1);
700 }
701 }
702 if(oggpack_look(&r,1)!=-1 ||
703 oggpack_read(&r,1)!=-1){
704 fprintf(stderr,"failed; read past end without -1.\n");
705 exit(1);
706 }
707 oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);
708 if(oggpack_read(&r,30)!=0 || oggpack_read(&r,16)!=0){
709 fprintf(stderr,"failed 2; got -1 prematurely.\n");
710 exit(1);
711 }
712
713 if(oggpack_look(&r,18)!=0 ||
714 oggpack_look(&r,18)!=0){
715 fprintf(stderr,"failed 3; got -1 prematurely.\n");
716 exit(1);
717 }
718 if(oggpack_look(&r,19)!=-1 ||
719 oggpack_look(&r,19)!=-1){
720 fprintf(stderr,"failed; read past end without -1.\n");
721 exit(1);
722 }
723 if(oggpack_look(&r,32)!=-1 ||
724 oggpack_look(&r,32)!=-1){
725 fprintf(stderr,"failed; read past end without -1.\n");
726 exit(1);
727 }
728 oggpack_writeclear(&o);
729 fprintf(stderr,"ok.\n");
730
731 /********** lazy, cut-n-paste retest with MSb packing ***********/
732
733 /* Test read/write together */
734 /* Later we test against pregenerated bitstreams */
735 oggpackB_writeinit(&o);
736
737 fprintf(stderr,"\nSmall preclipped packing (MSb): ");
738 cliptestB(testbuffer1,test1size,0,oneB,onesize);
739 fprintf(stderr,"ok.");
740
741 fprintf(stderr,"\nNull bit call (MSb): ");
742 cliptestB(testbuffer3,test3size,0,twoB,twosize);
743 fprintf(stderr,"ok.");
744
745 fprintf(stderr,"\nLarge preclipped packing (MSb): ");
746 cliptestB(testbuffer2,test2size,0,threeB,threesize);
747 fprintf(stderr,"ok.");
748
749 fprintf(stderr,"\n32 bit preclipped packing (MSb): ");
750 oggpackB_reset(&o);
751 for(i=0;i<test2size;i++)
752 oggpackB_write(&o,large[i],32);
753 buffer=oggpackB_get_buffer(&o);
754 bytes=oggpackB_bytes(&o);
755 oggpackB_readinit(&r,buffer,bytes);
756 for(i=0;i<test2size;i++){
757 if(oggpackB_look(&r,32)==-1)report("out of data. failed!");
758 if(oggpackB_look(&r,32)!=large[i]){
759 fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpackB_look(&r,32),large[i],
760 oggpackB_look(&r,32),large[i]);
761 report("read incorrect value!\n");
762 }
763 oggpackB_adv(&r,32);
764 }
765 if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");
766 fprintf(stderr,"ok.");
767
768 fprintf(stderr,"\nSmall unclipped packing (MSb): ");
769 cliptestB(testbuffer1,test1size,7,fourB,foursize);
770 fprintf(stderr,"ok.");
771
772 fprintf(stderr,"\nLarge unclipped packing (MSb): ");
773 cliptestB(testbuffer2,test2size,17,fiveB,fivesize);
774 fprintf(stderr,"ok.");
775
776 fprintf(stderr,"\nSingle bit unclipped packing (MSb): ");
777 cliptestB(testbuffer3,test3size,1,sixB,sixsize);
778 fprintf(stderr,"ok.");
779
780 fprintf(stderr,"\nTesting read past end (MSb): ");
781 oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);
782 for(i=0;i<64;i++){
783 if(oggpackB_read(&r,1)!=0){
784 fprintf(stderr,"failed; got -1 prematurely.\n");
785 exit(1);
786 }
787 }
788 if(oggpackB_look(&r,1)!=-1 ||
789 oggpackB_read(&r,1)!=-1){
790 fprintf(stderr,"failed; read past end without -1.\n");
791 exit(1);
792 }
793 oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);
794 if(oggpackB_read(&r,30)!=0 || oggpackB_read(&r,16)!=0){
795 fprintf(stderr,"failed 2; got -1 prematurely.\n");
796 exit(1);
797 }
798
799 if(oggpackB_look(&r,18)!=0 ||
800 oggpackB_look(&r,18)!=0){
801 fprintf(stderr,"failed 3; got -1 prematurely.\n");
802 exit(1);
803 }
804 if(oggpackB_look(&r,19)!=-1 ||
805 oggpackB_look(&r,19)!=-1){
806 fprintf(stderr,"failed; read past end without -1.\n");
807 exit(1);
808 }
809 if(oggpackB_look(&r,32)!=-1 ||
810 oggpackB_look(&r,32)!=-1){
811 fprintf(stderr,"failed; read past end without -1.\n");
812 exit(1);
813 }
814 oggpackB_writeclear(&o);
815 fprintf(stderr,"ok.\n\n");
816
817
818 return(0);
819 }
820 #endif /* _V_SELFTEST */
821
822 #undef BUFFER_INCREMENT
823