1/* 2 * Copyright (c) 2016-2021, Przemyslaw Skibinski, Yann Collet, Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 12/* === Tuning parameters === */ 13#ifndef ZWRAP_USE_ZSTD 14 #define ZWRAP_USE_ZSTD 0 15#endif 16 17 18/* === Dependencies === */ 19#include <stdlib.h> 20#include <stdio.h> /* vsprintf */ 21#include <stdarg.h> /* va_list, for z_gzprintf */ 22#include <string.h> 23#define NO_DUMMY_DECL 24#define ZLIB_CONST 25#include <zlib.h> /* without #define Z_PREFIX */ 26#include "zstd_zlibwrapper.h" 27#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_isFrame, ZSTD_MAGICNUMBER, ZSTD_customMem */ 28#include "zstd.h" 29 30 31/* === Constants === */ 32#define Z_INFLATE_SYNC 8 33#define ZLIB_HEADERSIZE 4 34#define ZSTD_HEADERSIZE ZSTD_FRAMEHEADERSIZE_MIN(ZSTD_f_zstd1) 35#define ZWRAP_DEFAULT_CLEVEL 3 /* Z_DEFAULT_COMPRESSION is translated to ZWRAP_DEFAULT_CLEVEL for zstd */ 36 37 38/* === Debug === */ 39#define LOG_WRAPPERC(...) /* fprintf(stderr, __VA_ARGS__) */ 40#define LOG_WRAPPERD(...) /* fprintf(stderr, __VA_ARGS__) */ 41 42#define FINISH_WITH_GZ_ERR(msg) { (void)msg; return Z_STREAM_ERROR; } 43#define FINISH_WITH_NULL_ERR(msg) { (void)msg; return NULL; } 44 45/* === Utility === */ 46 47#define MIN(x,y) ((x) < (y) ? (x) : (y)) 48 49static unsigned ZWRAP_isLittleEndian(void) 50{ 51 const union { unsigned u; char c[4]; } one = { 1 }; /* don't use static : performance detrimental */ 52 return one.c[0]; 53} 54 55#ifndef __has_builtin 56# define __has_builtin(x) 0 57#endif 58 59static unsigned ZWRAP_swap32(unsigned in) 60{ 61#if defined(_MSC_VER) /* Visual Studio */ 62 return _byteswap_ulong(in); 63#elif (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \ 64 || (defined(__clang__) && __has_builtin(__builtin_bswap32)) 65 return __builtin_bswap32(in); 66#else 67 return ((in << 24) & 0xff000000 ) | 68 ((in << 8) & 0x00ff0000 ) | 69 ((in >> 8) & 0x0000ff00 ) | 70 ((in >> 24) & 0x000000ff ); 71#endif 72} 73 74static unsigned ZWRAP_readLE32(const void* ptr) 75{ 76 unsigned value; 77 memcpy(&value, ptr, sizeof(value)); 78 if (ZWRAP_isLittleEndian()) 79 return value; 80 else 81 return ZWRAP_swap32(value); 82} 83 84 85/* === Wrapper === */ 86static int g_ZWRAP_useZSTDcompression = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */ 87 88void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; } 89 90int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; } 91 92 93 94static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO; 95 96void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; } 97 98ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; } 99 100 101 102const char * zstdVersion(void) { return ZSTD_VERSION_STRING; } 103 104ZEXTERN const char * ZEXPORT z_zlibVersion OF((void)) { return zlibVersion(); } 105 106static void* ZWRAP_allocFunction(void* opaque, size_t size) 107{ 108 z_streamp strm = (z_streamp) opaque; 109 void* address = strm->zalloc(strm->opaque, 1, (uInt)size); 110 /* LOG_WRAPPERC("ZWRAP alloc %p, %d \n", address, (int)size); */ 111 return address; 112} 113 114static void ZWRAP_freeFunction(void* opaque, void* address) 115{ 116 z_streamp strm = (z_streamp) opaque; 117 strm->zfree(strm->opaque, address); 118 /* if (address) LOG_WRAPPERC("ZWRAP free %p \n", address); */ 119} 120 121static void* ZWRAP_customMalloc(size_t size, ZSTD_customMem customMem) 122{ 123 if (customMem.customAlloc) 124 return customMem.customAlloc(customMem.opaque, size); 125 return malloc(size); 126} 127 128static void* ZWRAP_customCalloc(size_t size, ZSTD_customMem customMem) 129{ 130 if (customMem.customAlloc) { 131 /* calloc implemented as malloc+memset; 132 * not as efficient as calloc, but next best guess for custom malloc */ 133 void* const ptr = customMem.customAlloc(customMem.opaque, size); 134 memset(ptr, 0, size); 135 return ptr; 136 } 137 return calloc(1, size); 138} 139 140static void ZWRAP_customFree(void* ptr, ZSTD_customMem customMem) 141{ 142 if (ptr!=NULL) { 143 if (customMem.customFree) 144 customMem.customFree(customMem.opaque, ptr); 145 else 146 free(ptr); 147 } 148} 149 150 151 152/* === Compression === */ 153typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t; 154 155typedef struct { 156 ZSTD_CStream* zbc; 157 int compressionLevel; 158 int streamEnd; /* a flag to signal the end of a stream */ 159 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */ 160 ZSTD_customMem customMem; 161 z_stream allocFunc; /* copy of zalloc, zfree, opaque */ 162 ZSTD_inBuffer inBuffer; 163 ZSTD_outBuffer outBuffer; 164 ZWRAP_state_t comprState; 165 unsigned long long pledgedSrcSize; 166} ZWRAP_CCtx; 167 168/* typedef ZWRAP_CCtx internal_state; */ 169 170 171 172static size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc) 173{ 174 if (zwc==NULL) return 0; /* support free on NULL */ 175 ZSTD_freeCStream(zwc->zbc); 176 ZWRAP_customFree(zwc, zwc->customMem); 177 return 0; 178} 179 180 181static ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm) 182{ 183 ZWRAP_CCtx* zwc; 184 ZSTD_customMem customMem = { NULL, NULL, NULL }; 185 186 if (strm->zalloc && strm->zfree) { 187 customMem.customAlloc = ZWRAP_allocFunction; 188 customMem.customFree = ZWRAP_freeFunction; 189 } 190 customMem.opaque = strm; 191 192 zwc = (ZWRAP_CCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_CCtx), customMem); 193 if (zwc == NULL) return NULL; 194 zwc->allocFunc = *strm; 195 customMem.opaque = &zwc->allocFunc; 196 zwc->customMem = customMem; 197 198 return zwc; 199} 200 201 202static int ZWRAP_initializeCStream(ZWRAP_CCtx* zwc, const void* dict, size_t dictSize, unsigned long long pledgedSrcSize) 203{ 204 LOG_WRAPPERC("- ZWRAP_initializeCStream=%p\n", zwc); 205 if (zwc == NULL || zwc->zbc == NULL) return Z_STREAM_ERROR; 206 207 if (!pledgedSrcSize) pledgedSrcSize = zwc->pledgedSrcSize; 208 { unsigned initErr = 0; 209 ZSTD_parameters const params = ZSTD_getParams(zwc->compressionLevel, pledgedSrcSize, dictSize); 210 ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams(); 211 if (!cctxParams) return Z_STREAM_ERROR; 212 LOG_WRAPPERC("pledgedSrcSize=%d windowLog=%d chainLog=%d hashLog=%d searchLog=%d minMatch=%d strategy=%d\n", 213 (int)pledgedSrcSize, params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.minMatch, params.cParams.strategy); 214 215 initErr |= ZSTD_isError(ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only)); 216 initErr |= ZSTD_isError(ZSTD_CCtxParams_init_advanced(cctxParams, params)); 217 initErr |= ZSTD_isError(ZSTD_CCtx_setParametersUsingCCtxParams(zwc->zbc, cctxParams)); 218 initErr |= ZSTD_isError(ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, pledgedSrcSize)); 219 initErr |= ZSTD_isError(ZSTD_CCtx_loadDictionary(zwc->zbc, dict, dictSize)); 220 221 ZSTD_freeCCtxParams(cctxParams); 222 if (initErr) return Z_STREAM_ERROR; 223 } 224 225 return Z_OK; 226} 227 228 229static int ZWRAPC_finishWithError(ZWRAP_CCtx* zwc, z_streamp strm, int error) 230{ 231 LOG_WRAPPERC("- ZWRAPC_finishWithError=%d\n", error); 232 if (zwc) ZWRAP_freeCCtx(zwc); 233 if (strm) strm->state = NULL; 234 return (error) ? error : Z_STREAM_ERROR; 235} 236 237 238static int ZWRAPC_finishWithErrorMsg(z_streamp strm, char* message) 239{ 240 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 241 strm->msg = message; 242 if (zwc == NULL) return Z_STREAM_ERROR; 243 244 return ZWRAPC_finishWithError(zwc, strm, 0); 245} 246 247 248int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize) 249{ 250 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 251 if (zwc == NULL) return Z_STREAM_ERROR; 252 253 zwc->pledgedSrcSize = pledgedSrcSize; 254 zwc->comprState = ZWRAP_useInit; 255 return Z_OK; 256} 257 258static struct internal_state* convert_into_sis(void* ptr) 259{ 260 return (struct internal_state*) ptr; 261} 262 263ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level, 264 const char *version, int stream_size)) 265{ 266 ZWRAP_CCtx* zwc; 267 268 LOG_WRAPPERC("- deflateInit level=%d\n", level); 269 if (!g_ZWRAP_useZSTDcompression) { 270 return deflateInit_((strm), (level), version, stream_size); 271 } 272 273 zwc = ZWRAP_createCCtx(strm); 274 if (zwc == NULL) return Z_MEM_ERROR; 275 276 if (level == Z_DEFAULT_COMPRESSION) 277 level = ZWRAP_DEFAULT_CLEVEL; 278 279 zwc->streamEnd = 0; 280 zwc->totalInBytes = 0; 281 zwc->compressionLevel = level; 282 strm->state = convert_into_sis(zwc); /* use state which in not used by user */ 283 strm->total_in = 0; 284 strm->total_out = 0; 285 strm->adler = 0; 286 return Z_OK; 287} 288 289 290ZEXTERN int ZEXPORT z_deflateInit2_ OF((z_streamp strm, int level, int method, 291 int windowBits, int memLevel, 292 int strategy, const char *version, 293 int stream_size)) 294{ 295 if (!g_ZWRAP_useZSTDcompression) 296 return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, version, stream_size); 297 298 return z_deflateInit_ (strm, level, version, stream_size); 299} 300 301 302int ZWRAP_deflateReset_keepDict(z_streamp strm) 303{ 304 LOG_WRAPPERC("- ZWRAP_deflateReset_keepDict\n"); 305 if (!g_ZWRAP_useZSTDcompression) 306 return deflateReset(strm); 307 308 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 309 if (zwc) { 310 zwc->streamEnd = 0; 311 zwc->totalInBytes = 0; 312 } 313 } 314 315 strm->total_in = 0; 316 strm->total_out = 0; 317 strm->adler = 0; 318 return Z_OK; 319} 320 321 322ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm)) 323{ 324 LOG_WRAPPERC("- deflateReset\n"); 325 if (!g_ZWRAP_useZSTDcompression) 326 return deflateReset(strm); 327 328 ZWRAP_deflateReset_keepDict(strm); 329 330 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 331 if (zwc) zwc->comprState = ZWRAP_useInit; 332 } 333 return Z_OK; 334} 335 336 337ZEXTERN int ZEXPORT z_deflateSetDictionary OF((z_streamp strm, 338 const Bytef *dictionary, 339 uInt dictLength)) 340{ 341 if (!g_ZWRAP_useZSTDcompression) { 342 LOG_WRAPPERC("- deflateSetDictionary\n"); 343 return deflateSetDictionary(strm, dictionary, dictLength); 344 } 345 346 { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 347 LOG_WRAPPERC("- deflateSetDictionary level=%d\n", (int)zwc->compressionLevel); 348 if (!zwc) return Z_STREAM_ERROR; 349 if (zwc->zbc == NULL) { 350 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem); 351 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0); 352 } 353 { int res = ZWRAP_initializeCStream(zwc, dictionary, dictLength, ZSTD_CONTENTSIZE_UNKNOWN); 354 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); } 355 zwc->comprState = ZWRAP_useReset; 356 } 357 358 return Z_OK; 359} 360 361 362ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush)) 363{ 364 ZWRAP_CCtx* zwc; 365 366 if (!g_ZWRAP_useZSTDcompression) { 367 LOG_WRAPPERC("- deflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", 368 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); 369 return deflate(strm, flush); 370 } 371 372 zwc = (ZWRAP_CCtx*) strm->state; 373 if (zwc == NULL) { LOG_WRAPPERC("zwc == NULL\n"); return Z_STREAM_ERROR; } 374 375 if (zwc->zbc == NULL) { 376 zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem); 377 if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0); 378 { int const initErr = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN); 379 if (initErr != Z_OK) return ZWRAPC_finishWithError(zwc, strm, initErr); } 380 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset; 381 } else { 382 if (zwc->totalInBytes == 0) { 383 if (zwc->comprState == ZWRAP_useReset) { 384 size_t resetErr = ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only); 385 if (ZSTD_isError(resetErr)) { 386 LOG_WRAPPERC("ERROR: ZSTD_CCtx_reset errorCode=%s\n", 387 ZSTD_getErrorName(resetErr)); 388 return ZWRAPC_finishWithError(zwc, strm, 0); 389 } 390 resetErr = ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, (flush == Z_FINISH) ? strm->avail_in : zwc->pledgedSrcSize); 391 if (ZSTD_isError(resetErr)) { 392 LOG_WRAPPERC("ERROR: ZSTD_CCtx_setPledgedSrcSize errorCode=%s\n", 393 ZSTD_getErrorName(resetErr)); 394 return ZWRAPC_finishWithError(zwc, strm, 0); 395 } 396 } else { 397 int const res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN); 398 if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); 399 if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset; 400 } 401 } /* (zwc->totalInBytes == 0) */ 402 } /* ! (zwc->zbc == NULL) */ 403 404 LOG_WRAPPERC("- deflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); 405 if (strm->avail_in > 0) { 406 zwc->inBuffer.src = strm->next_in; 407 zwc->inBuffer.size = strm->avail_in; 408 zwc->inBuffer.pos = 0; 409 zwc->outBuffer.dst = strm->next_out; 410 zwc->outBuffer.size = strm->avail_out; 411 zwc->outBuffer.pos = 0; 412 { size_t const cErr = ZSTD_compressStream(zwc->zbc, &zwc->outBuffer, &zwc->inBuffer); 413 LOG_WRAPPERC("deflate ZSTD_compressStream srcSize=%d dstCapacity=%d\n", (int)zwc->inBuffer.size, (int)zwc->outBuffer.size); 414 if (ZSTD_isError(cErr)) return ZWRAPC_finishWithError(zwc, strm, 0); 415 } 416 strm->next_out += zwc->outBuffer.pos; 417 strm->total_out += zwc->outBuffer.pos; 418 strm->avail_out -= zwc->outBuffer.pos; 419 strm->total_in += zwc->inBuffer.pos; 420 zwc->totalInBytes += zwc->inBuffer.pos; 421 strm->next_in += zwc->inBuffer.pos; 422 strm->avail_in -= zwc->inBuffer.pos; 423 } 424 425 if (flush == Z_FULL_FLUSH 426#if ZLIB_VERNUM >= 0x1240 427 || flush == Z_TREES 428#endif 429 || flush == Z_BLOCK) 430 return ZWRAPC_finishWithErrorMsg(strm, "Z_FULL_FLUSH, Z_BLOCK and Z_TREES are not supported!"); 431 432 if (flush == Z_FINISH) { 433 size_t bytesLeft; 434 if (zwc->streamEnd) return Z_STREAM_END; 435 zwc->outBuffer.dst = strm->next_out; 436 zwc->outBuffer.size = strm->avail_out; 437 zwc->outBuffer.pos = 0; 438 bytesLeft = ZSTD_endStream(zwc->zbc, &zwc->outBuffer); 439 LOG_WRAPPERC("deflate ZSTD_endStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft); 440 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0); 441 strm->next_out += zwc->outBuffer.pos; 442 strm->total_out += zwc->outBuffer.pos; 443 strm->avail_out -= zwc->outBuffer.pos; 444 if (bytesLeft == 0) { 445 zwc->streamEnd = 1; 446 LOG_WRAPPERC("Z_STREAM_END2 strm->total_in=%d strm->avail_out=%d strm->total_out=%d\n", 447 (int)strm->total_in, (int)strm->avail_out, (int)strm->total_out); 448 return Z_STREAM_END; 449 } } 450 else 451 if (flush == Z_SYNC_FLUSH || flush == Z_PARTIAL_FLUSH) { 452 size_t bytesLeft; 453 zwc->outBuffer.dst = strm->next_out; 454 zwc->outBuffer.size = strm->avail_out; 455 zwc->outBuffer.pos = 0; 456 bytesLeft = ZSTD_flushStream(zwc->zbc, &zwc->outBuffer); 457 LOG_WRAPPERC("deflate ZSTD_flushStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft); 458 if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0); 459 strm->next_out += zwc->outBuffer.pos; 460 strm->total_out += zwc->outBuffer.pos; 461 strm->avail_out -= zwc->outBuffer.pos; 462 } 463 LOG_WRAPPERC("- deflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); 464 return Z_OK; 465} 466 467 468ZEXTERN int ZEXPORT z_deflateEnd OF((z_streamp strm)) 469{ 470 if (!g_ZWRAP_useZSTDcompression) { 471 LOG_WRAPPERC("- deflateEnd\n"); 472 return deflateEnd(strm); 473 } 474 LOG_WRAPPERC("- deflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out)); 475 { size_t errorCode; 476 ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; 477 if (zwc == NULL) return Z_OK; /* structures are already freed */ 478 strm->state = NULL; 479 errorCode = ZWRAP_freeCCtx(zwc); 480 if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; 481 } 482 return Z_OK; 483} 484 485 486ZEXTERN uLong ZEXPORT z_deflateBound OF((z_streamp strm, 487 uLong sourceLen)) 488{ 489 if (!g_ZWRAP_useZSTDcompression) 490 return deflateBound(strm, sourceLen); 491 492 return ZSTD_compressBound(sourceLen); 493} 494 495 496ZEXTERN int ZEXPORT z_deflateParams OF((z_streamp strm, 497 int level, 498 int strategy)) 499{ 500 if (!g_ZWRAP_useZSTDcompression) { 501 LOG_WRAPPERC("- deflateParams level=%d strategy=%d\n", level, strategy); 502 return deflateParams(strm, level, strategy); 503 } 504 505 return Z_OK; 506} 507 508 509 510 511 512/* === Decompression === */ 513 514typedef enum { ZWRAP_ZLIB_STREAM, ZWRAP_ZSTD_STREAM, ZWRAP_UNKNOWN_STREAM } ZWRAP_stream_type; 515 516typedef struct { 517 ZSTD_DStream* zbd; 518 char headerBuf[16]; /* must be >= ZSTD_frameHeaderSize_min */ 519 int errorCount; 520 unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */ 521 ZWRAP_state_t decompState; 522 ZSTD_inBuffer inBuffer; 523 ZSTD_outBuffer outBuffer; 524 525 /* zlib params */ 526 int stream_size; 527 char *version; 528 int windowBits; 529 ZSTD_customMem customMem; 530 z_stream allocFunc; /* just to copy zalloc, zfree, opaque */ 531} ZWRAP_DCtx; 532 533 534static void ZWRAP_initDCtx(ZWRAP_DCtx* zwd) 535{ 536 zwd->errorCount = 0; 537 zwd->outBuffer.pos = 0; 538 zwd->outBuffer.size = 0; 539} 540 541static ZWRAP_DCtx* ZWRAP_createDCtx(z_streamp strm) 542{ 543 ZWRAP_DCtx* zwd; 544 ZSTD_customMem customMem = { NULL, NULL, NULL }; 545 546 if (strm->zalloc && strm->zfree) { 547 customMem.customAlloc = ZWRAP_allocFunction; 548 customMem.customFree = ZWRAP_freeFunction; 549 } 550 customMem.opaque = strm; 551 552 zwd = (ZWRAP_DCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_DCtx), customMem); 553 if (zwd == NULL) return NULL; 554 zwd->allocFunc = *strm; 555 customMem.opaque = &zwd->allocFunc; 556 zwd->customMem = customMem; 557 558 ZWRAP_initDCtx(zwd); 559 return zwd; 560} 561 562static size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd) 563{ 564 if (zwd==NULL) return 0; /* support free on null */ 565 ZSTD_freeDStream(zwd->zbd); 566 ZWRAP_customFree(zwd->version, zwd->customMem); 567 ZWRAP_customFree(zwd, zwd->customMem); 568 return 0; 569} 570 571 572int ZWRAP_isUsingZSTDdecompression(z_streamp strm) 573{ 574 if (strm == NULL) return 0; 575 return (strm->reserved == ZWRAP_ZSTD_STREAM); 576} 577 578 579static int ZWRAPD_finishWithError(ZWRAP_DCtx* zwd, z_streamp strm, int error) 580{ 581 LOG_WRAPPERD("- ZWRAPD_finishWithError=%d\n", error); 582 ZWRAP_freeDCtx(zwd); 583 strm->state = NULL; 584 return (error) ? error : Z_STREAM_ERROR; 585} 586 587static int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message) 588{ 589 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; 590 strm->msg = message; 591 if (zwd == NULL) return Z_STREAM_ERROR; 592 593 return ZWRAPD_finishWithError(zwd, strm, 0); 594} 595 596 597ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm, 598 const char* version, int stream_size)) 599{ 600 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) { 601 strm->reserved = ZWRAP_ZLIB_STREAM; 602 return inflateInit(strm); 603 } 604 605 { ZWRAP_DCtx* const zwd = ZWRAP_createDCtx(strm); 606 LOG_WRAPPERD("- inflateInit\n"); 607 if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0); 608 609 zwd->version = (char*)ZWRAP_customMalloc(strlen(version)+1, zwd->customMem); 610 if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0); 611 strcpy(zwd->version, version); 612 613 zwd->stream_size = stream_size; 614 zwd->totalInBytes = 0; 615 strm->state = convert_into_sis(zwd); 616 strm->total_in = 0; 617 strm->total_out = 0; 618 strm->reserved = ZWRAP_UNKNOWN_STREAM; 619 strm->adler = 0; 620 } 621 622 return Z_OK; 623} 624 625 626ZEXTERN int ZEXPORT z_inflateInit2_ OF((z_streamp strm, int windowBits, 627 const char *version, int stream_size)) 628{ 629 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) { 630 return inflateInit2_(strm, windowBits, version, stream_size); 631 } 632 633 { int const ret = z_inflateInit_ (strm, version, stream_size); 634 LOG_WRAPPERD("- inflateInit2 windowBits=%d\n", windowBits); 635 if (ret == Z_OK) { 636 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state; 637 if (zwd == NULL) return Z_STREAM_ERROR; 638 zwd->windowBits = windowBits; 639 } 640 return ret; 641 } 642} 643 644int ZWRAP_inflateReset_keepDict(z_streamp strm) 645{ 646 LOG_WRAPPERD("- ZWRAP_inflateReset_keepDict\n"); 647 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 648 return inflateReset(strm); 649 650 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; 651 if (zwd == NULL) return Z_STREAM_ERROR; 652 ZWRAP_initDCtx(zwd); 653 zwd->decompState = ZWRAP_useReset; 654 zwd->totalInBytes = 0; 655 } 656 657 strm->total_in = 0; 658 strm->total_out = 0; 659 return Z_OK; 660} 661 662 663ZEXTERN int ZEXPORT z_inflateReset OF((z_streamp strm)) 664{ 665 LOG_WRAPPERD("- inflateReset\n"); 666 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 667 return inflateReset(strm); 668 669 { int const ret = ZWRAP_inflateReset_keepDict(strm); 670 if (ret != Z_OK) return ret; } 671 672 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; 673 if (zwd == NULL) return Z_STREAM_ERROR; 674 zwd->decompState = ZWRAP_useInit; } 675 676 return Z_OK; 677} 678 679 680#if ZLIB_VERNUM >= 0x1240 681ZEXTERN int ZEXPORT z_inflateReset2 OF((z_streamp strm, 682 int windowBits)) 683{ 684 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 685 return inflateReset2(strm, windowBits); 686 687 { int const ret = z_inflateReset (strm); 688 if (ret == Z_OK) { 689 ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*)strm->state; 690 if (zwd == NULL) return Z_STREAM_ERROR; 691 zwd->windowBits = windowBits; 692 } 693 return ret; 694 } 695} 696#endif 697 698 699ZEXTERN int ZEXPORT z_inflateSetDictionary OF((z_streamp strm, 700 const Bytef *dictionary, 701 uInt dictLength)) 702{ 703 LOG_WRAPPERD("- inflateSetDictionary\n"); 704 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 705 return inflateSetDictionary(strm, dictionary, dictLength); 706 707 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; 708 if (zwd == NULL || zwd->zbd == NULL) return Z_STREAM_ERROR; 709 { size_t const initErr = ZSTD_initDStream_usingDict(zwd->zbd, dictionary, dictLength); 710 if (ZSTD_isError(initErr)) return ZWRAPD_finishWithError(zwd, strm, 0); } 711 zwd->decompState = ZWRAP_useReset; 712 713 if (zwd->totalInBytes == ZSTD_HEADERSIZE) { 714 zwd->inBuffer.src = zwd->headerBuf; 715 zwd->inBuffer.size = zwd->totalInBytes; 716 zwd->inBuffer.pos = 0; 717 zwd->outBuffer.dst = strm->next_out; 718 zwd->outBuffer.size = 0; 719 zwd->outBuffer.pos = 0; 720 { size_t const errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); 721 LOG_WRAPPERD("inflateSetDictionary ZSTD_decompressStream errorCode=%d srcSize=%d dstCapacity=%d\n", 722 (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); 723 if (zwd->inBuffer.pos < zwd->outBuffer.size || ZSTD_isError(errorCode)) { 724 LOG_WRAPPERD("ERROR: ZSTD_decompressStream %s\n", 725 ZSTD_getErrorName(errorCode)); 726 return ZWRAPD_finishWithError(zwd, strm, 0); 727 } } } } 728 729 return Z_OK; 730} 731 732 733ZEXTERN int ZEXPORT z_inflate OF((z_streamp strm, int flush)) 734{ 735 ZWRAP_DCtx* zwd; 736 737 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { 738 int const result = inflate(strm, flush); 739 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", 740 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, result); 741 return result; 742 } 743 744 if (strm->avail_in <= 0) return Z_OK; 745 746 zwd = (ZWRAP_DCtx*) strm->state; 747 LOG_WRAPPERD("- inflate1 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d\n", 748 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); 749 750 if (zwd == NULL) return Z_STREAM_ERROR; 751 if (zwd->decompState == ZWRAP_streamEnd) return Z_STREAM_END; 752 753 if (zwd->totalInBytes < ZLIB_HEADERSIZE) { 754 if (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) { 755 if (ZWRAP_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) { 756 { int const initErr = (zwd->windowBits) ? 757 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) : 758 inflateInit_(strm, zwd->version, zwd->stream_size); 759 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr); 760 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr); 761 } 762 763 strm->reserved = ZWRAP_ZLIB_STREAM; 764 { size_t const freeErr = ZWRAP_freeDCtx(zwd); 765 if (ZSTD_isError(freeErr)) goto error; } 766 767 { int const result = (flush == Z_INFLATE_SYNC) ? 768 inflateSync(strm) : 769 inflate(strm, flush); 770 LOG_WRAPPERD("- inflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", 771 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); 772 return result; 773 } } 774 } else { /* ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */ 775 size_t const srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - zwd->totalInBytes); 776 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize); 777 strm->total_in += srcSize; 778 zwd->totalInBytes += srcSize; 779 strm->next_in += srcSize; 780 strm->avail_in -= srcSize; 781 if (zwd->totalInBytes < ZLIB_HEADERSIZE) return Z_OK; 782 783 if (ZWRAP_readLE32(zwd->headerBuf) != ZSTD_MAGICNUMBER) { 784 z_stream strm2; 785 strm2.next_in = strm->next_in; 786 strm2.avail_in = strm->avail_in; 787 strm2.next_out = strm->next_out; 788 strm2.avail_out = strm->avail_out; 789 790 { int const initErr = (zwd->windowBits) ? 791 inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) : 792 inflateInit_(strm, zwd->version, zwd->stream_size); 793 LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr); 794 if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr); 795 } 796 797 /* inflate header */ 798 strm->next_in = (unsigned char*)zwd->headerBuf; 799 strm->avail_in = ZLIB_HEADERSIZE; 800 strm->avail_out = 0; 801 { int const dErr = inflate(strm, Z_NO_FLUSH); 802 LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n", 803 dErr, (int)strm->avail_in); 804 if (dErr != Z_OK) 805 return ZWRAPD_finishWithError(zwd, strm, dErr); 806 } 807 if (strm->avail_in > 0) goto error; 808 809 strm->next_in = strm2.next_in; 810 strm->avail_in = strm2.avail_in; 811 strm->next_out = strm2.next_out; 812 strm->avail_out = strm2.avail_out; 813 814 strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */ 815 { size_t const freeErr = ZWRAP_freeDCtx(zwd); 816 if (ZSTD_isError(freeErr)) goto error; } 817 818 { int const result = (flush == Z_INFLATE_SYNC) ? 819 inflateSync(strm) : 820 inflate(strm, flush); 821 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", 822 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); 823 return result; 824 } } } /* if ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */ 825 } /* (zwd->totalInBytes < ZLIB_HEADERSIZE) */ 826 827 strm->reserved = ZWRAP_ZSTD_STREAM; /* mark as zstd steam */ 828 829 if (flush == Z_INFLATE_SYNC) { strm->msg = "inflateSync is not supported!"; goto error; } 830 831 if (!zwd->zbd) { 832 zwd->zbd = ZSTD_createDStream_advanced(zwd->customMem); 833 if (zwd->zbd == NULL) { LOG_WRAPPERD("ERROR: ZSTD_createDStream_advanced\n"); goto error; } 834 zwd->decompState = ZWRAP_useInit; 835 } 836 837 if (zwd->totalInBytes < ZSTD_HEADERSIZE) { 838 if (zwd->totalInBytes == 0 && strm->avail_in >= ZSTD_HEADERSIZE) { 839 if (zwd->decompState == ZWRAP_useInit) { 840 size_t const initErr = ZSTD_initDStream(zwd->zbd); 841 if (ZSTD_isError(initErr)) { 842 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", 843 ZSTD_getErrorName(initErr)); 844 goto error; 845 } 846 } else { 847 size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only); 848 if (ZSTD_isError(resetErr)) goto error; 849 } 850 } else { 851 size_t const srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - zwd->totalInBytes); 852 memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize); 853 strm->total_in += srcSize; 854 zwd->totalInBytes += srcSize; 855 strm->next_in += srcSize; 856 strm->avail_in -= srcSize; 857 if (zwd->totalInBytes < ZSTD_HEADERSIZE) return Z_OK; 858 859 if (zwd->decompState == ZWRAP_useInit) { 860 size_t const initErr = ZSTD_initDStream(zwd->zbd); 861 if (ZSTD_isError(initErr)) { 862 LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", 863 ZSTD_getErrorName(initErr)); 864 goto error; 865 } 866 } else { 867 size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only); 868 if (ZSTD_isError(resetErr)) goto error; 869 } 870 871 zwd->inBuffer.src = zwd->headerBuf; 872 zwd->inBuffer.size = ZSTD_HEADERSIZE; 873 zwd->inBuffer.pos = 0; 874 zwd->outBuffer.dst = strm->next_out; 875 zwd->outBuffer.size = 0; 876 zwd->outBuffer.pos = 0; 877 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); 878 LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n", 879 (int)dErr, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); 880 if (ZSTD_isError(dErr)) { 881 LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(dErr)); 882 goto error; 883 } } 884 if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */ 885 } 886 } /* (zwd->totalInBytes < ZSTD_HEADERSIZE) */ 887 888 zwd->inBuffer.src = strm->next_in; 889 zwd->inBuffer.size = strm->avail_in; 890 zwd->inBuffer.pos = 0; 891 zwd->outBuffer.dst = strm->next_out; 892 zwd->outBuffer.size = strm->avail_out; 893 zwd->outBuffer.pos = 0; 894 { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); 895 LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n", 896 (int)dErr, (int)strm->avail_in, (int)strm->avail_out); 897 if (ZSTD_isError(dErr)) { 898 zwd->errorCount++; 899 LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n", 900 ZSTD_getErrorName(dErr), zwd->errorCount); 901 if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error; 902 } 903 LOG_WRAPPERD("inflate inBuffer.pos=%d inBuffer.size=%d outBuffer.pos=%d outBuffer.size=%d o\n", 904 (int)zwd->inBuffer.pos, (int)zwd->inBuffer.size, (int)zwd->outBuffer.pos, (int)zwd->outBuffer.size); 905 strm->next_out += zwd->outBuffer.pos; 906 strm->total_out += zwd->outBuffer.pos; 907 strm->avail_out -= zwd->outBuffer.pos; 908 strm->total_in += zwd->inBuffer.pos; 909 zwd->totalInBytes += zwd->inBuffer.pos; 910 strm->next_in += zwd->inBuffer.pos; 911 strm->avail_in -= zwd->inBuffer.pos; 912 if (dErr == 0) { 913 LOG_WRAPPERD("inflate Z_STREAM_END1 avail_in=%d avail_out=%d total_in=%d total_out=%d\n", 914 (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); 915 zwd->decompState = ZWRAP_streamEnd; 916 return Z_STREAM_END; 917 } 918 } /* dErr lifetime */ 919 920 LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", 921 (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, Z_OK); 922 return Z_OK; 923 924error: 925 return ZWRAPD_finishWithError(zwd, strm, 0); 926} 927 928 929ZEXTERN int ZEXPORT z_inflateEnd OF((z_streamp strm)) 930{ 931 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 932 return inflateEnd(strm); 933 934 LOG_WRAPPERD("- inflateEnd total_in=%d total_out=%d\n", 935 (int)(strm->total_in), (int)(strm->total_out)); 936 { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state; 937 if (zwd == NULL) return Z_OK; /* structures are already freed */ 938 { size_t const freeErr = ZWRAP_freeDCtx(zwd); 939 if (ZSTD_isError(freeErr)) return Z_STREAM_ERROR; } 940 strm->state = NULL; 941 } 942 return Z_OK; 943} 944 945 946ZEXTERN int ZEXPORT z_inflateSync OF((z_streamp strm)) 947{ 948 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { 949 return inflateSync(strm); 950 } 951 952 return z_inflate(strm, Z_INFLATE_SYNC); 953} 954 955 956 957/* Advanced compression functions */ 958ZEXTERN int ZEXPORT z_deflateCopy OF((z_streamp dest, 959 z_streamp source)) 960{ 961 if (!g_ZWRAP_useZSTDcompression) 962 return deflateCopy(dest, source); 963 return ZWRAPC_finishWithErrorMsg(source, "deflateCopy is not supported!"); 964} 965 966 967ZEXTERN int ZEXPORT z_deflateTune OF((z_streamp strm, 968 int good_length, 969 int max_lazy, 970 int nice_length, 971 int max_chain)) 972{ 973 if (!g_ZWRAP_useZSTDcompression) 974 return deflateTune(strm, good_length, max_lazy, nice_length, max_chain); 975 return ZWRAPC_finishWithErrorMsg(strm, "deflateTune is not supported!"); 976} 977 978 979#if ZLIB_VERNUM >= 0x1260 980ZEXTERN int ZEXPORT z_deflatePending OF((z_streamp strm, 981 unsigned *pending, 982 int *bits)) 983{ 984 if (!g_ZWRAP_useZSTDcompression) 985 return deflatePending(strm, pending, bits); 986 return ZWRAPC_finishWithErrorMsg(strm, "deflatePending is not supported!"); 987} 988#endif 989 990 991ZEXTERN int ZEXPORT z_deflatePrime OF((z_streamp strm, 992 int bits, 993 int value)) 994{ 995 if (!g_ZWRAP_useZSTDcompression) 996 return deflatePrime(strm, bits, value); 997 return ZWRAPC_finishWithErrorMsg(strm, "deflatePrime is not supported!"); 998} 999 1000 1001ZEXTERN int ZEXPORT z_deflateSetHeader OF((z_streamp strm, 1002 gz_headerp head)) 1003{ 1004 if (!g_ZWRAP_useZSTDcompression) 1005 return deflateSetHeader(strm, head); 1006 return ZWRAPC_finishWithErrorMsg(strm, "deflateSetHeader is not supported!"); 1007} 1008 1009 1010 1011 1012/* Advanced decompression functions */ 1013#if ZLIB_VERNUM >= 0x1280 1014ZEXTERN int ZEXPORT z_inflateGetDictionary OF((z_streamp strm, 1015 Bytef *dictionary, 1016 uInt *dictLength)) 1017{ 1018 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1019 return inflateGetDictionary(strm, dictionary, dictLength); 1020 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetDictionary is not supported!"); 1021} 1022#endif 1023 1024 1025ZEXTERN int ZEXPORT z_inflateCopy OF((z_streamp dest, 1026 z_streamp source)) 1027{ 1028 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !source->reserved) 1029 return inflateCopy(dest, source); 1030 return ZWRAPD_finishWithErrorMsg(source, "inflateCopy is not supported!"); 1031} 1032 1033 1034#if ZLIB_VERNUM >= 0x1240 1035ZEXTERN long ZEXPORT z_inflateMark OF((z_streamp strm)) 1036{ 1037 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1038 return inflateMark(strm); 1039 return ZWRAPD_finishWithErrorMsg(strm, "inflateMark is not supported!"); 1040} 1041#endif 1042 1043 1044ZEXTERN int ZEXPORT z_inflatePrime OF((z_streamp strm, 1045 int bits, 1046 int value)) 1047{ 1048 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1049 return inflatePrime(strm, bits, value); 1050 return ZWRAPD_finishWithErrorMsg(strm, "inflatePrime is not supported!"); 1051} 1052 1053 1054ZEXTERN int ZEXPORT z_inflateGetHeader OF((z_streamp strm, 1055 gz_headerp head)) 1056{ 1057 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1058 return inflateGetHeader(strm, head); 1059 return ZWRAPD_finishWithErrorMsg(strm, "inflateGetHeader is not supported!"); 1060} 1061 1062 1063ZEXTERN int ZEXPORT z_inflateBackInit_ OF((z_streamp strm, int windowBits, 1064 unsigned char FAR *window, 1065 const char *version, 1066 int stream_size)) 1067{ 1068 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1069 return inflateBackInit_(strm, windowBits, window, version, stream_size); 1070 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackInit is not supported!"); 1071} 1072 1073 1074ZEXTERN int ZEXPORT z_inflateBack OF((z_streamp strm, 1075 in_func in, void FAR *in_desc, 1076 out_func out, void FAR *out_desc)) 1077{ 1078 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1079 return inflateBack(strm, in, in_desc, out, out_desc); 1080 return ZWRAPD_finishWithErrorMsg(strm, "inflateBack is not supported!"); 1081} 1082 1083 1084ZEXTERN int ZEXPORT z_inflateBackEnd OF((z_streamp strm)) 1085{ 1086 if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) 1087 return inflateBackEnd(strm); 1088 return ZWRAPD_finishWithErrorMsg(strm, "inflateBackEnd is not supported!"); 1089} 1090 1091 1092ZEXTERN uLong ZEXPORT z_zlibCompileFlags OF((void)) { return zlibCompileFlags(); } 1093 1094 1095 1096 /* === utility functions === */ 1097#ifndef Z_SOLO 1098 1099ZEXTERN int ZEXPORT z_compress OF((Bytef *dest, uLongf *destLen, 1100 const Bytef *source, uLong sourceLen)) 1101{ 1102 if (!g_ZWRAP_useZSTDcompression) 1103 return compress(dest, destLen, source, sourceLen); 1104 1105 { size_t dstCapacity = *destLen; 1106 size_t const cSize = ZSTD_compress(dest, dstCapacity, 1107 source, sourceLen, 1108 ZWRAP_DEFAULT_CLEVEL); 1109 LOG_WRAPPERD("z_compress sourceLen=%d dstCapacity=%d\n", 1110 (int)sourceLen, (int)dstCapacity); 1111 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR; 1112 *destLen = cSize; 1113 } 1114 return Z_OK; 1115} 1116 1117 1118ZEXTERN int ZEXPORT z_compress2 OF((Bytef *dest, uLongf *destLen, 1119 const Bytef *source, uLong sourceLen, 1120 int level)) 1121{ 1122 if (!g_ZWRAP_useZSTDcompression) 1123 return compress2(dest, destLen, source, sourceLen, level); 1124 1125 { size_t dstCapacity = *destLen; 1126 size_t const cSize = ZSTD_compress(dest, dstCapacity, source, sourceLen, level); 1127 if (ZSTD_isError(cSize)) return Z_STREAM_ERROR; 1128 *destLen = cSize; 1129 } 1130 return Z_OK; 1131} 1132 1133 1134ZEXTERN uLong ZEXPORT z_compressBound OF((uLong sourceLen)) 1135{ 1136 if (!g_ZWRAP_useZSTDcompression) 1137 return compressBound(sourceLen); 1138 1139 return ZSTD_compressBound(sourceLen); 1140} 1141 1142 1143ZEXTERN int ZEXPORT z_uncompress OF((Bytef *dest, uLongf *destLen, 1144 const Bytef *source, uLong sourceLen)) 1145{ 1146 if (!ZSTD_isFrame(source, sourceLen)) 1147 return uncompress(dest, destLen, source, sourceLen); 1148 1149 { size_t dstCapacity = *destLen; 1150 size_t const dSize = ZSTD_decompress(dest, dstCapacity, source, sourceLen); 1151 if (ZSTD_isError(dSize)) return Z_STREAM_ERROR; 1152 *destLen = dSize; 1153 } 1154 return Z_OK; 1155} 1156 1157#endif /* !Z_SOLO */ 1158 1159 1160 /* checksum functions */ 1161 1162ZEXTERN uLong ZEXPORT z_adler32 OF((uLong adler, const Bytef *buf, uInt len)) 1163{ 1164 return adler32(adler, buf, len); 1165} 1166 1167ZEXTERN uLong ZEXPORT z_crc32 OF((uLong crc, const Bytef *buf, uInt len)) 1168{ 1169 return crc32(crc, buf, len); 1170} 1171 1172 1173#if ZLIB_VERNUM >= 0x12B0 1174ZEXTERN uLong ZEXPORT z_adler32_z OF((uLong adler, const Bytef *buf, z_size_t len)) 1175{ 1176 return adler32_z(adler, buf, len); 1177} 1178 1179ZEXTERN uLong ZEXPORT z_crc32_z OF((uLong crc, const Bytef *buf, z_size_t len)) 1180{ 1181 return crc32_z(crc, buf, len); 1182} 1183#endif 1184 1185 1186#if ZLIB_VERNUM >= 0x1270 1187ZEXTERN const z_crc_t FAR * ZEXPORT z_get_crc_table OF((void)) 1188{ 1189 return get_crc_table(); 1190} 1191#endif 1192 1193 /* Error function */ 1194ZEXTERN const char * ZEXPORT z_zError OF((int err)) 1195{ 1196 /* Just use zlib Error function */ 1197 return zError(err); 1198} 1199