1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC 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 1994-2002 *
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 7675 2004-09-01 00:34:39Z 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_writetrunc(oggpack_buffer * b,long bits)50 void oggpack_writetrunc(oggpack_buffer *b,long bits){
51 long bytes=bits>>3;
52 bits-=bytes*8;
53 b->ptr=b->buffer+bytes;
54 b->endbit=bits;
55 b->endbyte=bytes;
56 *b->ptr&=mask[bits];
57 }
58
oggpackB_writetrunc(oggpack_buffer * b,long bits)59 void oggpackB_writetrunc(oggpack_buffer *b,long bits){
60 long bytes=bits>>3;
61 bits-=bytes*8;
62 b->ptr=b->buffer+bytes;
63 b->endbit=bits;
64 b->endbyte=bytes;
65 *b->ptr&=mask8B[bits];
66 }
67
68 /* Takes only up to 32 bits. */
oggpack_write(oggpack_buffer * b,unsigned long value,int bits)69 void oggpack_write(oggpack_buffer *b,unsigned long value,int bits){
70 if(b->endbyte+4>=b->storage){
71 b->buffer=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);
72 b->storage+=BUFFER_INCREMENT;
73 b->ptr=b->buffer+b->endbyte;
74 }
75
76 value&=mask[bits];
77 bits+=b->endbit;
78
79 b->ptr[0]|=value<<b->endbit;
80
81 if(bits>=8){
82 b->ptr[1]=(unsigned char)(value>>(8-b->endbit));
83 if(bits>=16){
84 b->ptr[2]=(unsigned char)(value>>(16-b->endbit));
85 if(bits>=24){
86 b->ptr[3]=(unsigned char)(value>>(24-b->endbit));
87 if(bits>=32){
88 if(b->endbit)
89 b->ptr[4]=(unsigned char)(value>>(32-b->endbit));
90 else
91 b->ptr[4]=0;
92 }
93 }
94 }
95 }
96
97 b->endbyte+=bits/8;
98 b->ptr+=bits/8;
99 b->endbit=bits&7;
100 }
101
102 /* Takes only up to 32 bits. */
oggpackB_write(oggpack_buffer * b,unsigned long value,int bits)103 void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits){
104 if(b->endbyte+4>=b->storage){
105 b->buffer=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT);
106 b->storage+=BUFFER_INCREMENT;
107 b->ptr=b->buffer+b->endbyte;
108 }
109
110 value=(value&mask[bits])<<(32-bits);
111 bits+=b->endbit;
112
113 b->ptr[0]|=value>>(24+b->endbit);
114
115 if(bits>=8){
116 b->ptr[1]=(unsigned char)(value>>(16+b->endbit));
117 if(bits>=16){
118 b->ptr[2]=(unsigned char)(value>>(8+b->endbit));
119 if(bits>=24){
120 b->ptr[3]=(unsigned char)(value>>(b->endbit));
121 if(bits>=32){
122 if(b->endbit)
123 b->ptr[4]=(unsigned char)(value<<(8-b->endbit));
124 else
125 b->ptr[4]=0;
126 }
127 }
128 }
129 }
130
131 b->endbyte+=bits/8;
132 b->ptr+=bits/8;
133 b->endbit=bits&7;
134 }
135
oggpack_writealign(oggpack_buffer * b)136 void oggpack_writealign(oggpack_buffer *b){
137 int bits=8-b->endbit;
138 if(bits<8)
139 oggpack_write(b,0,bits);
140 }
141
oggpackB_writealign(oggpack_buffer * b)142 void oggpackB_writealign(oggpack_buffer *b){
143 int bits=8-b->endbit;
144 if(bits<8)
145 oggpackB_write(b,0,bits);
146 }
147
oggpack_writecopy_helper(oggpack_buffer * b,void * source,long bits,void (* w)(oggpack_buffer *,unsigned long,int),int msb)148 static void oggpack_writecopy_helper(oggpack_buffer *b,
149 void *source,
150 long bits,
151 void (*w)(oggpack_buffer *,
152 unsigned long,
153 int),
154 int msb){
155 unsigned char *ptr=(unsigned char *)source;
156
157 long bytes=bits/8;
158 bits-=bytes*8;
159
160 if(b->endbit){
161 int i;
162 /* unaligned copy. Do it the hard way. */
163 for(i=0;i<bytes;i++)
164 w(b,(unsigned long)(ptr[i]),8);
165 }else{
166 /* aligned block copy */
167 if(b->endbyte+bytes+1>=b->storage){
168 b->storage=b->endbyte+bytes+BUFFER_INCREMENT;
169 b->buffer=_ogg_realloc(b->buffer,b->storage);
170 b->ptr=b->buffer+b->endbyte;
171 }
172
173 memmove(b->ptr,source,bytes);
174 b->ptr+=bytes;
175 b->endbyte+=bytes;
176 *b->ptr=0;
177
178 }
179 if(bits){
180 if(msb)
181 w(b,(unsigned long)(ptr[bytes]>>(8-bits)),bits);
182 else
183 w(b,(unsigned long)(ptr[bytes]),bits);
184 }
185 }
186
oggpack_writecopy(oggpack_buffer * b,void * source,long bits)187 void oggpack_writecopy(oggpack_buffer *b,void *source,long bits){
188 oggpack_writecopy_helper(b,source,bits,oggpack_write,0);
189 }
190
oggpackB_writecopy(oggpack_buffer * b,void * source,long bits)191 void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits){
192 oggpack_writecopy_helper(b,source,bits,oggpackB_write,1);
193 }
194
oggpack_reset(oggpack_buffer * b)195 void oggpack_reset(oggpack_buffer *b){
196 b->ptr=b->buffer;
197 b->buffer[0]=0;
198 b->endbit=b->endbyte=0;
199 }
200
oggpackB_reset(oggpack_buffer * b)201 void oggpackB_reset(oggpack_buffer *b){
202 oggpack_reset(b);
203 }
204
oggpack_writeclear(oggpack_buffer * b)205 void oggpack_writeclear(oggpack_buffer *b){
206 _ogg_free(b->buffer);
207 memset(b,0,sizeof(*b));
208 }
209
oggpackB_writeclear(oggpack_buffer * b)210 void oggpackB_writeclear(oggpack_buffer *b){
211 oggpack_writeclear(b);
212 }
213
oggpack_readinit(oggpack_buffer * b,unsigned char * buf,int bytes)214 void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
215 memset(b,0,sizeof(*b));
216 b->buffer=b->ptr=buf;
217 b->storage=bytes;
218 }
219
oggpackB_readinit(oggpack_buffer * b,unsigned char * buf,int bytes)220 void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){
221 oggpack_readinit(b,buf,bytes);
222 }
223
224 /* Read in bits without advancing the bitptr; bits <= 32 */
oggpack_look(oggpack_buffer * b,int bits)225 long oggpack_look(oggpack_buffer *b,int bits){
226 unsigned long ret;
227 unsigned long m=mask[bits];
228
229 bits+=b->endbit;
230
231 if(b->endbyte+4>=b->storage){
232 /* not the main path */
233 if(b->endbyte*8+bits>b->storage*8)return(-1);
234 }
235
236 ret=b->ptr[0]>>b->endbit;
237 if(bits>8){
238 ret|=b->ptr[1]<<(8-b->endbit);
239 if(bits>16){
240 ret|=b->ptr[2]<<(16-b->endbit);
241 if(bits>24){
242 ret|=b->ptr[3]<<(24-b->endbit);
243 if(bits>32 && b->endbit)
244 ret|=b->ptr[4]<<(32-b->endbit);
245 }
246 }
247 }
248 return(m&ret);
249 }
250
251 /* Read in bits without advancing the bitptr; bits <= 32 */
oggpackB_look(oggpack_buffer * b,int bits)252 long oggpackB_look(oggpack_buffer *b,int bits){
253 unsigned long ret;
254 int m=32-bits;
255
256 bits+=b->endbit;
257
258 if(b->endbyte+4>=b->storage){
259 /* not the main path */
260 if(b->endbyte*8+bits>b->storage*8)return(-1);
261 }
262
263 ret=b->ptr[0]<<(24+b->endbit);
264 if(bits>8){
265 ret|=b->ptr[1]<<(16+b->endbit);
266 if(bits>16){
267 ret|=b->ptr[2]<<(8+b->endbit);
268 if(bits>24){
269 ret|=b->ptr[3]<<(b->endbit);
270 if(bits>32 && b->endbit)
271 ret|=b->ptr[4]>>(8-b->endbit);
272 }
273 }
274 }
275 return ((ret&0xffffffff)>>(m>>1))>>((m+1)>>1);
276 }
277
oggpack_look1(oggpack_buffer * b)278 long oggpack_look1(oggpack_buffer *b){
279 if(b->endbyte>=b->storage)return(-1);
280 return((b->ptr[0]>>b->endbit)&1);
281 }
282
oggpackB_look1(oggpack_buffer * b)283 long oggpackB_look1(oggpack_buffer *b){
284 if(b->endbyte>=b->storage)return(-1);
285 return((b->ptr[0]>>(7-b->endbit))&1);
286 }
287
oggpack_adv(oggpack_buffer * b,int bits)288 void oggpack_adv(oggpack_buffer *b,int bits){
289 bits+=b->endbit;
290 b->ptr+=bits/8;
291 b->endbyte+=bits/8;
292 b->endbit=bits&7;
293 }
294
oggpackB_adv(oggpack_buffer * b,int bits)295 void oggpackB_adv(oggpack_buffer *b,int bits){
296 oggpack_adv(b,bits);
297 }
298
oggpack_adv1(oggpack_buffer * b)299 void oggpack_adv1(oggpack_buffer *b){
300 if(++(b->endbit)>7){
301 b->endbit=0;
302 b->ptr++;
303 b->endbyte++;
304 }
305 }
306
oggpackB_adv1(oggpack_buffer * b)307 void oggpackB_adv1(oggpack_buffer *b){
308 oggpack_adv1(b);
309 }
310
311 /* bits <= 32 */
oggpack_read(oggpack_buffer * b,int bits)312 long oggpack_read(oggpack_buffer *b,int bits){
313 long ret;
314 unsigned long m=mask[bits];
315
316 bits+=b->endbit;
317
318 if(b->endbyte+4>=b->storage){
319 /* not the main path */
320 ret=-1L;
321 if(b->endbyte*8+bits>b->storage*8)goto overflow;
322 }
323
324 ret=b->ptr[0]>>b->endbit;
325 if(bits>8){
326 ret|=b->ptr[1]<<(8-b->endbit);
327 if(bits>16){
328 ret|=b->ptr[2]<<(16-b->endbit);
329 if(bits>24){
330 ret|=b->ptr[3]<<(24-b->endbit);
331 if(bits>32 && b->endbit){
332 ret|=b->ptr[4]<<(32-b->endbit);
333 }
334 }
335 }
336 }
337 ret&=m;
338
339 overflow:
340
341 b->ptr+=bits/8;
342 b->endbyte+=bits/8;
343 b->endbit=bits&7;
344 return(ret);
345 }
346
347 /* bits <= 32 */
oggpackB_read(oggpack_buffer * b,int bits)348 long oggpackB_read(oggpack_buffer *b,int bits){
349 long ret;
350 long m=32-bits;
351
352 bits+=b->endbit;
353
354 if(b->endbyte+4>=b->storage){
355 /* not the main path */
356 ret=-1L;
357 if(b->endbyte*8+bits>b->storage*8)goto overflow;
358 }
359
360 ret=b->ptr[0]<<(24+b->endbit);
361 if(bits>8){
362 ret|=b->ptr[1]<<(16+b->endbit);
363 if(bits>16){
364 ret|=b->ptr[2]<<(8+b->endbit);
365 if(bits>24){
366 ret|=b->ptr[3]<<(b->endbit);
367 if(bits>32 && b->endbit)
368 ret|=b->ptr[4]>>(8-b->endbit);
369 }
370 }
371 }
372 ret=((ret&0xffffffffUL)>>(m>>1))>>((m+1)>>1);
373
374 overflow:
375
376 b->ptr+=bits/8;
377 b->endbyte+=bits/8;
378 b->endbit=bits&7;
379 return(ret);
380 }
381
oggpack_read1(oggpack_buffer * b)382 long oggpack_read1(oggpack_buffer *b){
383 long ret;
384
385 if(b->endbyte>=b->storage){
386 /* not the main path */
387 ret=-1L;
388 goto overflow;
389 }
390
391 ret=(b->ptr[0]>>b->endbit)&1;
392
393 overflow:
394
395 b->endbit++;
396 if(b->endbit>7){
397 b->endbit=0;
398 b->ptr++;
399 b->endbyte++;
400 }
401 return(ret);
402 }
403
oggpackB_read1(oggpack_buffer * b)404 long oggpackB_read1(oggpack_buffer *b){
405 long ret;
406
407 if(b->endbyte>=b->storage){
408 /* not the main path */
409 ret=-1L;
410 goto overflow;
411 }
412
413 ret=(b->ptr[0]>>(7-b->endbit))&1;
414
415 overflow:
416
417 b->endbit++;
418 if(b->endbit>7){
419 b->endbit=0;
420 b->ptr++;
421 b->endbyte++;
422 }
423 return(ret);
424 }
425
oggpack_bytes(oggpack_buffer * b)426 long oggpack_bytes(oggpack_buffer *b){
427 return(b->endbyte+(b->endbit+7)/8);
428 }
429
oggpack_bits(oggpack_buffer * b)430 long oggpack_bits(oggpack_buffer *b){
431 return(b->endbyte*8+b->endbit);
432 }
433
oggpackB_bytes(oggpack_buffer * b)434 long oggpackB_bytes(oggpack_buffer *b){
435 return oggpack_bytes(b);
436 }
437
oggpackB_bits(oggpack_buffer * b)438 long oggpackB_bits(oggpack_buffer *b){
439 return oggpack_bits(b);
440 }
441
oggpack_get_buffer(oggpack_buffer * b)442 unsigned char *oggpack_get_buffer(oggpack_buffer *b){
443 return(b->buffer);
444 }
445
oggpackB_get_buffer(oggpack_buffer * b)446 unsigned char *oggpackB_get_buffer(oggpack_buffer *b){
447 return oggpack_get_buffer(b);
448 }
449
450 /* Self test of the bitwise routines; everything else is based on
451 them, so they damned well better be solid. */
452
453 #ifdef _V_SELFTEST
454 #include <stdio.h>
455
ilog(unsigned int v)456 static int ilog(unsigned int v){
457 int ret=0;
458 while(v){
459 ret++;
460 v>>=1;
461 }
462 return(ret);
463 }
464
465 oggpack_buffer o;
466 oggpack_buffer r;
467
report(char * in)468 void report(char *in){
469 fprintf(stderr,"%s",in);
470 exit(1);
471 }
472
cliptest(unsigned long * b,int vals,int bits,int * comp,int compsize)473 void cliptest(unsigned long *b,int vals,int bits,int *comp,int compsize){
474 long bytes,i;
475 unsigned char *buffer;
476
477 oggpack_reset(&o);
478 for(i=0;i<vals;i++)
479 oggpack_write(&o,b[i],bits?bits:ilog(b[i]));
480 buffer=oggpack_get_buffer(&o);
481 bytes=oggpack_bytes(&o);
482 if(bytes!=compsize)report("wrong number of bytes!\n");
483 for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){
484 for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);
485 report("wrote incorrect value!\n");
486 }
487 oggpack_readinit(&r,buffer,bytes);
488 for(i=0;i<vals;i++){
489 int tbit=bits?bits:ilog(b[i]);
490 if(oggpack_look(&r,tbit)==-1)
491 report("out of data!\n");
492 if(oggpack_look(&r,tbit)!=(b[i]&mask[tbit]))
493 report("looked at incorrect value!\n");
494 if(tbit==1)
495 if(oggpack_look1(&r)!=(b[i]&mask[tbit]))
496 report("looked at single bit incorrect value!\n");
497 if(tbit==1){
498 if(oggpack_read1(&r)!=(b[i]&mask[tbit]))
499 report("read incorrect single bit value!\n");
500 }else{
501 if(oggpack_read(&r,tbit)!=(b[i]&mask[tbit]))
502 report("read incorrect value!\n");
503 }
504 }
505 if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");
506 }
507
cliptestB(unsigned long * b,int vals,int bits,int * comp,int compsize)508 void cliptestB(unsigned long *b,int vals,int bits,int *comp,int compsize){
509 long bytes,i;
510 unsigned char *buffer;
511
512 oggpackB_reset(&o);
513 for(i=0;i<vals;i++)
514 oggpackB_write(&o,b[i],bits?bits:ilog(b[i]));
515 buffer=oggpackB_get_buffer(&o);
516 bytes=oggpackB_bytes(&o);
517 if(bytes!=compsize)report("wrong number of bytes!\n");
518 for(i=0;i<bytes;i++)if(buffer[i]!=comp[i]){
519 for(i=0;i<bytes;i++)fprintf(stderr,"%x %x\n",(int)buffer[i],(int)comp[i]);
520 report("wrote incorrect value!\n");
521 }
522 oggpackB_readinit(&r,buffer,bytes);
523 for(i=0;i<vals;i++){
524 int tbit=bits?bits:ilog(b[i]);
525 if(oggpackB_look(&r,tbit)==-1)
526 report("out of data!\n");
527 if(oggpackB_look(&r,tbit)!=(b[i]&mask[tbit]))
528 report("looked at incorrect value!\n");
529 if(tbit==1)
530 if(oggpackB_look1(&r)!=(b[i]&mask[tbit]))
531 report("looked at single bit incorrect value!\n");
532 if(tbit==1){
533 if(oggpackB_read1(&r)!=(b[i]&mask[tbit]))
534 report("read incorrect single bit value!\n");
535 }else{
536 if(oggpackB_read(&r,tbit)!=(b[i]&mask[tbit]))
537 report("read incorrect value!\n");
538 }
539 }
540 if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");
541 }
542
main(void)543 int main(void){
544 unsigned char *buffer;
545 long bytes,i;
546 static unsigned long testbuffer1[]=
547 {18,12,103948,4325,543,76,432,52,3,65,4,56,32,42,34,21,1,23,32,546,456,7,
548 567,56,8,8,55,3,52,342,341,4,265,7,67,86,2199,21,7,1,5,1,4};
549 int test1size=43;
550
551 static unsigned long testbuffer2[]=
552 {216531625L,1237861823,56732452,131,3212421,12325343,34547562,12313212,
553 1233432,534,5,346435231,14436467,7869299,76326614,167548585,
554 85525151,0,12321,1,349528352};
555 int test2size=21;
556
557 static unsigned long testbuffer3[]=
558 {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,
559 0,1,30,1,1,1,0,0,1,0,0,0,12,0,11,0,1,0,0,1};
560 int test3size=56;
561
562 static unsigned long large[]=
563 {2136531625L,2137861823,56732452,131,3212421,12325343,34547562,12313212,
564 1233432,534,5,2146435231,14436467,7869299,76326614,167548585,
565 85525151,0,12321,1,2146528352};
566
567 int onesize=33;
568 static int one[33]={146,25,44,151,195,15,153,176,233,131,196,65,85,172,47,40,
569 34,242,223,136,35,222,211,86,171,50,225,135,214,75,172,
570 223,4};
571 static int oneB[33]={150,101,131,33,203,15,204,216,105,193,156,65,84,85,222,
572 8,139,145,227,126,34,55,244,171,85,100,39,195,173,18,
573 245,251,128};
574
575 int twosize=6;
576 static int two[6]={61,255,255,251,231,29};
577 static int twoB[6]={247,63,255,253,249,120};
578
579 int threesize=54;
580 static int three[54]={169,2,232,252,91,132,156,36,89,13,123,176,144,32,254,
581 142,224,85,59,121,144,79,124,23,67,90,90,216,79,23,83,
582 58,135,196,61,55,129,183,54,101,100,170,37,127,126,10,
583 100,52,4,14,18,86,77,1};
584 static int threeB[54]={206,128,42,153,57,8,183,251,13,89,36,30,32,144,183,
585 130,59,240,121,59,85,223,19,228,180,134,33,107,74,98,
586 233,253,196,135,63,2,110,114,50,155,90,127,37,170,104,
587 200,20,254,4,58,106,176,144,0};
588
589 int foursize=38;
590 static int four[38]={18,6,163,252,97,194,104,131,32,1,7,82,137,42,129,11,72,
591 132,60,220,112,8,196,109,64,179,86,9,137,195,208,122,169,
592 28,2,133,0,1};
593 static int fourB[38]={36,48,102,83,243,24,52,7,4,35,132,10,145,21,2,93,2,41,
594 1,219,184,16,33,184,54,149,170,132,18,30,29,98,229,67,
595 129,10,4,32};
596
597 int fivesize=45;
598 static int five[45]={169,2,126,139,144,172,30,4,80,72,240,59,130,218,73,62,
599 241,24,210,44,4,20,0,248,116,49,135,100,110,130,181,169,
600 84,75,159,2,1,0,132,192,8,0,0,18,22};
601 static int fiveB[45]={1,84,145,111,245,100,128,8,56,36,40,71,126,78,213,226,
602 124,105,12,0,133,128,0,162,233,242,67,152,77,205,77,
603 172,150,169,129,79,128,0,6,4,32,0,27,9,0};
604
605 int sixsize=7;
606 static int six[7]={17,177,170,242,169,19,148};
607 static int sixB[7]={136,141,85,79,149,200,41};
608
609 /* Test read/write together */
610 /* Later we test against pregenerated bitstreams */
611 oggpack_writeinit(&o);
612
613 fprintf(stderr,"\nSmall preclipped packing (LSb): ");
614 cliptest(testbuffer1,test1size,0,one,onesize);
615 fprintf(stderr,"ok.");
616
617 fprintf(stderr,"\nNull bit call (LSb): ");
618 cliptest(testbuffer3,test3size,0,two,twosize);
619 fprintf(stderr,"ok.");
620
621 fprintf(stderr,"\nLarge preclipped packing (LSb): ");
622 cliptest(testbuffer2,test2size,0,three,threesize);
623 fprintf(stderr,"ok.");
624
625 fprintf(stderr,"\n32 bit preclipped packing (LSb): ");
626 oggpack_reset(&o);
627 for(i=0;i<test2size;i++)
628 oggpack_write(&o,large[i],32);
629 buffer=oggpack_get_buffer(&o);
630 bytes=oggpack_bytes(&o);
631 oggpack_readinit(&r,buffer,bytes);
632 for(i=0;i<test2size;i++){
633 if(oggpack_look(&r,32)==-1)report("out of data. failed!");
634 if(oggpack_look(&r,32)!=large[i]){
635 fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpack_look(&r,32),large[i],
636 oggpack_look(&r,32),large[i]);
637 report("read incorrect value!\n");
638 }
639 oggpack_adv(&r,32);
640 }
641 if(oggpack_bytes(&r)!=bytes)report("leftover bytes after read!\n");
642 fprintf(stderr,"ok.");
643
644 fprintf(stderr,"\nSmall unclipped packing (LSb): ");
645 cliptest(testbuffer1,test1size,7,four,foursize);
646 fprintf(stderr,"ok.");
647
648 fprintf(stderr,"\nLarge unclipped packing (LSb): ");
649 cliptest(testbuffer2,test2size,17,five,fivesize);
650 fprintf(stderr,"ok.");
651
652 fprintf(stderr,"\nSingle bit unclipped packing (LSb): ");
653 cliptest(testbuffer3,test3size,1,six,sixsize);
654 fprintf(stderr,"ok.");
655
656 fprintf(stderr,"\nTesting read past end (LSb): ");
657 oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);
658 for(i=0;i<64;i++){
659 if(oggpack_read(&r,1)!=0){
660 fprintf(stderr,"failed; got -1 prematurely.\n");
661 exit(1);
662 }
663 }
664 if(oggpack_look(&r,1)!=-1 ||
665 oggpack_read(&r,1)!=-1){
666 fprintf(stderr,"failed; read past end without -1.\n");
667 exit(1);
668 }
669 oggpack_readinit(&r,"\0\0\0\0\0\0\0\0",8);
670 if(oggpack_read(&r,30)!=0 || oggpack_read(&r,16)!=0){
671 fprintf(stderr,"failed 2; got -1 prematurely.\n");
672 exit(1);
673 }
674
675 if(oggpack_look(&r,18)!=0 ||
676 oggpack_look(&r,18)!=0){
677 fprintf(stderr,"failed 3; got -1 prematurely.\n");
678 exit(1);
679 }
680 if(oggpack_look(&r,19)!=-1 ||
681 oggpack_look(&r,19)!=-1){
682 fprintf(stderr,"failed; read past end without -1.\n");
683 exit(1);
684 }
685 if(oggpack_look(&r,32)!=-1 ||
686 oggpack_look(&r,32)!=-1){
687 fprintf(stderr,"failed; read past end without -1.\n");
688 exit(1);
689 }
690 oggpack_writeclear(&o);
691 fprintf(stderr,"ok.\n");
692
693 /********** lazy, cut-n-paste retest with MSb packing ***********/
694
695 /* Test read/write together */
696 /* Later we test against pregenerated bitstreams */
697 oggpackB_writeinit(&o);
698
699 fprintf(stderr,"\nSmall preclipped packing (MSb): ");
700 cliptestB(testbuffer1,test1size,0,oneB,onesize);
701 fprintf(stderr,"ok.");
702
703 fprintf(stderr,"\nNull bit call (MSb): ");
704 cliptestB(testbuffer3,test3size,0,twoB,twosize);
705 fprintf(stderr,"ok.");
706
707 fprintf(stderr,"\nLarge preclipped packing (MSb): ");
708 cliptestB(testbuffer2,test2size,0,threeB,threesize);
709 fprintf(stderr,"ok.");
710
711 fprintf(stderr,"\n32 bit preclipped packing (MSb): ");
712 oggpackB_reset(&o);
713 for(i=0;i<test2size;i++)
714 oggpackB_write(&o,large[i],32);
715 buffer=oggpackB_get_buffer(&o);
716 bytes=oggpackB_bytes(&o);
717 oggpackB_readinit(&r,buffer,bytes);
718 for(i=0;i<test2size;i++){
719 if(oggpackB_look(&r,32)==-1)report("out of data. failed!");
720 if(oggpackB_look(&r,32)!=large[i]){
721 fprintf(stderr,"%ld != %ld (%lx!=%lx):",oggpackB_look(&r,32),large[i],
722 oggpackB_look(&r,32),large[i]);
723 report("read incorrect value!\n");
724 }
725 oggpackB_adv(&r,32);
726 }
727 if(oggpackB_bytes(&r)!=bytes)report("leftover bytes after read!\n");
728 fprintf(stderr,"ok.");
729
730 fprintf(stderr,"\nSmall unclipped packing (MSb): ");
731 cliptestB(testbuffer1,test1size,7,fourB,foursize);
732 fprintf(stderr,"ok.");
733
734 fprintf(stderr,"\nLarge unclipped packing (MSb): ");
735 cliptestB(testbuffer2,test2size,17,fiveB,fivesize);
736 fprintf(stderr,"ok.");
737
738 fprintf(stderr,"\nSingle bit unclipped packing (MSb): ");
739 cliptestB(testbuffer3,test3size,1,sixB,sixsize);
740 fprintf(stderr,"ok.");
741
742 fprintf(stderr,"\nTesting read past end (MSb): ");
743 oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);
744 for(i=0;i<64;i++){
745 if(oggpackB_read(&r,1)!=0){
746 fprintf(stderr,"failed; got -1 prematurely.\n");
747 exit(1);
748 }
749 }
750 if(oggpackB_look(&r,1)!=-1 ||
751 oggpackB_read(&r,1)!=-1){
752 fprintf(stderr,"failed; read past end without -1.\n");
753 exit(1);
754 }
755 oggpackB_readinit(&r,"\0\0\0\0\0\0\0\0",8);
756 if(oggpackB_read(&r,30)!=0 || oggpackB_read(&r,16)!=0){
757 fprintf(stderr,"failed 2; got -1 prematurely.\n");
758 exit(1);
759 }
760
761 if(oggpackB_look(&r,18)!=0 ||
762 oggpackB_look(&r,18)!=0){
763 fprintf(stderr,"failed 3; got -1 prematurely.\n");
764 exit(1);
765 }
766 if(oggpackB_look(&r,19)!=-1 ||
767 oggpackB_look(&r,19)!=-1){
768 fprintf(stderr,"failed; read past end without -1.\n");
769 exit(1);
770 }
771 if(oggpackB_look(&r,32)!=-1 ||
772 oggpackB_look(&r,32)!=-1){
773 fprintf(stderr,"failed; read past end without -1.\n");
774 exit(1);
775 }
776 oggpackB_writeclear(&o);
777 fprintf(stderr,"ok.\n\n");
778
779
780 return(0);
781 }
782 #endif /* _V_SELFTEST */
783
784 #undef BUFFER_INCREMENT
785