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 1994-2009 * 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 16051 2009-05-27 05:00:06Z 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 27static 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 36static const unsigned int mask8B[]= 37{0x00,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff}; 38 39void 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 46void oggpackB_writeinit(oggpack_buffer *b){ 47 oggpack_writeinit(b); 48} 49 50int oggpack_writecheck(oggpack_buffer *b){ 51 if(!b->ptr || !b->storage)return -1; 52 return 0; 53} 54 55int oggpackB_writecheck(oggpack_buffer *b){ 56 return oggpack_writecheck(b); 57} 58 59void 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 70void 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. */ 82void 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. */ 123void 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 163void oggpack_writealign(oggpack_buffer *b){ 164 int bits=8-b->endbit; 165 if(bits<8) 166 oggpack_write(b,0,bits); 167} 168 169void oggpackB_writealign(oggpack_buffer *b){ 170 int bits=8-b->endbit; 171 if(bits<8) 172 oggpackB_write(b,0,bits); 173} 174 175static 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 221void oggpack_writecopy(oggpack_buffer *b,void *source,long bits){ 222 oggpack_writecopy_helper(b,source,bits,oggpack_write,0); 223} 224 225void oggpackB_writecopy(oggpack_buffer *b,void *source,long bits){ 226 oggpack_writecopy_helper(b,source,bits,oggpackB_write,1); 227} 228 229void 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 236void oggpackB_reset(oggpack_buffer *b){ 237 oggpack_reset(b); 238} 239 240void oggpack_writeclear(oggpack_buffer *b){ 241 if(b->buffer)_ogg_free(b->buffer); 242 memset(b,0,sizeof(*b)); 243} 244 245void oggpackB_writeclear(oggpack_buffer *b){ 246 oggpack_writeclear(b); 247} 248 249void 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 255void 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 */ 260long 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 */ 287long 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 313long oggpack_look1(oggpack_buffer *b){ 314 if(b->endbyte>=b->storage)return(-1); 315 return((b->ptr[0]>>b->endbit)&1); 316} 317 318long oggpackB_look1(oggpack_buffer *b){ 319 if(b->endbyte>=b->storage)return(-1); 320 return((b->ptr[0]>>(7-b->endbit))&1); 321} 322 323void 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 330void oggpackB_adv(oggpack_buffer *b,int bits){ 331 oggpack_adv(b,bits); 332} 333 334void oggpack_adv1(oggpack_buffer *b){ 335 if(++(b->endbit)>7){ 336 b->endbit=0; 337 b->ptr++; 338 b->endbyte++; 339 } 340} 341 342void oggpackB_adv1(oggpack_buffer *b){ 343 oggpack_adv1(b); 344} 345 346/* bits <= 32 */ 347long 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 */ 383long 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 420long 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 442long 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 464long oggpack_bytes(oggpack_buffer *b){ 465 return(b->endbyte+(b->endbit+7)/8); 466} 467 468long oggpack_bits(oggpack_buffer *b){ 469 return(b->endbyte*8+b->endbit); 470} 471 472long oggpackB_bytes(oggpack_buffer *b){ 473 return oggpack_bytes(b); 474} 475 476long oggpackB_bits(oggpack_buffer *b){ 477 return oggpack_bits(b); 478} 479 480unsigned char *oggpack_get_buffer(oggpack_buffer *b){ 481 return(b->buffer); 482} 483 484unsigned 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 494static int ilog(unsigned int v){ 495 int ret=0; 496 while(v){ 497 ret++; 498 v>>=1; 499 } 500 return(ret); 501} 502 503oggpack_buffer o; 504oggpack_buffer r; 505 506void report(char *in){ 507 fprintf(stderr,"%s",in); 508 exit(1); 509} 510 511void 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 546void 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 581int 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