/** * Copyright (c) 2016-present, Przemyslaw Skibinski, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ #include /* vsprintf */ #include /* va_list, for z_gzprintf */ #include #include "zstd_zlibwrapper.h" #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_MAGICNUMBER */ #include "zstd.h" #include "zstd_internal.h" /* defaultCustomMem */ #define Z_INFLATE_SYNC 8 #define ZLIB_HEADERSIZE 4 #define ZSTD_HEADERSIZE ZSTD_frameHeaderSize_min #define ZWRAP_DEFAULT_CLEVEL 3 /* Z_DEFAULT_COMPRESSION is translated to ZWRAP_DEFAULT_CLEVEL for zstd */ #define LOG_WRAPPERC(...) /* printf(__VA_ARGS__) */ #define LOG_WRAPPERD(...) /* printf(__VA_ARGS__) */ #define FINISH_WITH_GZ_ERR(msg) { (void)msg; return Z_STREAM_ERROR; } #define FINISH_WITH_NULL_ERR(msg) { (void)msg; return NULL; } #ifndef ZWRAP_USE_ZSTD #define ZWRAP_USE_ZSTD 0 #endif static int g_ZWRAP_useZSTDcompression = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */ void ZWRAP_useZSTDcompression(int turn_on) { g_ZWRAP_useZSTDcompression = turn_on; } int ZWRAP_isUsingZSTDcompression(void) { return g_ZWRAP_useZSTDcompression; } static ZWRAP_decompress_type g_ZWRAPdecompressionType = ZWRAP_AUTO; void ZWRAP_setDecompressionType(ZWRAP_decompress_type type) { g_ZWRAPdecompressionType = type; }; ZWRAP_decompress_type ZWRAP_getDecompressionType(void) { return g_ZWRAPdecompressionType; } const char * zstdVersion(void) { return ZSTD_VERSION_STRING; } ZEXTERN const char * ZEXPORT z_zlibVersion OF((void)) { return zlibVersion(); } static void* ZWRAP_allocFunction(void* opaque, size_t size) { z_streamp strm = (z_streamp) opaque; void* address = strm->zalloc(strm->opaque, 1, size); /* printf("ZWRAP alloc %p, %d \n", address, (int)size); */ return address; } static void ZWRAP_freeFunction(void* opaque, void* address) { z_streamp strm = (z_streamp) opaque; strm->zfree(strm->opaque, address); /* if (address) printf("ZWRAP free %p \n", address); */ } /* *** Compression *** */ typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t; typedef struct { ZSTD_CStream* zbc; int compressionLevel; ZSTD_customMem customMem; z_stream allocFunc; /* copy of zalloc, zfree, opaque */ ZSTD_inBuffer inBuffer; ZSTD_outBuffer outBuffer; ZWRAP_state_t comprState; unsigned long long pledgedSrcSize; } ZWRAP_CCtx; size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc) { if (zwc==NULL) return 0; /* support free on NULL */ if (zwc->zbc) ZSTD_freeCStream(zwc->zbc); zwc->customMem.customFree(zwc->customMem.opaque, zwc); return 0; } ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm) { ZWRAP_CCtx* zwc; if (strm->zalloc && strm->zfree) { zwc = (ZWRAP_CCtx*)strm->zalloc(strm->opaque, 1, sizeof(ZWRAP_CCtx)); if (zwc==NULL) return NULL; memset(zwc, 0, sizeof(ZWRAP_CCtx)); memcpy(&zwc->allocFunc, strm, sizeof(z_stream)); { ZSTD_customMem ZWRAP_customMem = { ZWRAP_allocFunction, ZWRAP_freeFunction, &zwc->allocFunc }; memcpy(&zwc->customMem, &ZWRAP_customMem, sizeof(ZSTD_customMem)); } } else { zwc = (ZWRAP_CCtx*)defaultCustomMem.customAlloc(defaultCustomMem.opaque, sizeof(ZWRAP_CCtx)); if (zwc==NULL) return NULL; memset(zwc, 0, sizeof(ZWRAP_CCtx)); memcpy(&zwc->customMem, &defaultCustomMem, sizeof(ZSTD_customMem)); } return zwc; } int ZWRAP_initializeCStream(ZWRAP_CCtx* zwc, const void* dict, size_t dictSize, unsigned long long pledgedSrcSize) { LOG_WRAPPERC("- ZWRAP_initializeCStream=%p\n", zwc); if (zwc == NULL || zwc->zbc == NULL) return Z_STREAM_ERROR; if (!pledgedSrcSize) pledgedSrcSize = zwc->pledgedSrcSize; { ZSTD_parameters const params = ZSTD_getParams(zwc->compressionLevel, pledgedSrcSize, dictSize); size_t errorCode; LOG_WRAPPERC("pledgedSrcSize=%d windowLog=%d chainLog=%d hashLog=%d searchLog=%d searchLength=%d strategy=%d\n", (int)pledgedSrcSize, params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.searchLength, params.cParams.strategy); errorCode = ZSTD_initCStream_advanced(zwc->zbc, dict, dictSize, params, pledgedSrcSize); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; } return Z_OK; } int ZWRAPC_finishWithError(ZWRAP_CCtx* zwc, z_streamp strm, int error) { LOG_WRAPPERC("- ZWRAPC_finishWithError=%d\n", error); if (zwc) ZWRAP_freeCCtx(zwc); if (strm) strm->state = NULL; return (error) ? error : Z_STREAM_ERROR; } int ZWRAPC_finishWithErrorMsg(z_streamp strm, char* message) { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; strm->msg = message; if (zwc == NULL) return Z_STREAM_ERROR; return ZWRAPC_finishWithError(zwc, strm, 0); } int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize) { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; if (zwc == NULL) return Z_STREAM_ERROR; zwc->pledgedSrcSize = pledgedSrcSize; zwc->comprState = ZWRAP_useInit; return Z_OK; } ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level, const char *version, int stream_size)) { ZWRAP_CCtx* zwc; LOG_WRAPPERC("- deflateInit level=%d\n", level); if (!g_ZWRAP_useZSTDcompression) { return deflateInit_((strm), (level), version, stream_size); } zwc = ZWRAP_createCCtx(strm); if (zwc == NULL) return Z_MEM_ERROR; if (level == Z_DEFAULT_COMPRESSION) level = ZWRAP_DEFAULT_CLEVEL; zwc->compressionLevel = level; strm->state = (struct internal_state*) zwc; /* use state which in not used by user */ strm->total_in = 0; strm->total_out = 0; strm->adler = 0; return Z_OK; } ZEXTERN int ZEXPORT z_deflateInit2_ OF((z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy, const char *version, int stream_size)) { if (!g_ZWRAP_useZSTDcompression) return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, version, stream_size); return z_deflateInit_ (strm, level, version, stream_size); } int ZWRAP_deflateReset_keepDict(z_streamp strm) { LOG_WRAPPERC("- ZWRAP_deflateReset_keepDict\n"); if (!g_ZWRAP_useZSTDcompression) return deflateReset(strm); strm->total_in = 0; strm->total_out = 0; strm->adler = 0; return Z_OK; } ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm)) { LOG_WRAPPERC("- deflateReset\n"); if (!g_ZWRAP_useZSTDcompression) return deflateReset(strm); ZWRAP_deflateReset_keepDict(strm); { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; if (zwc) zwc->comprState = 0; } return Z_OK; } ZEXTERN int ZEXPORT z_deflateSetDictionary OF((z_streamp strm, const Bytef *dictionary, uInt dictLength)) { if (!g_ZWRAP_useZSTDcompression) { LOG_WRAPPERC("- deflateSetDictionary\n"); return deflateSetDictionary(strm, dictionary, dictLength); } { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; LOG_WRAPPERC("- deflateSetDictionary level=%d\n", (int)zwc->compressionLevel); if (!zwc) return Z_STREAM_ERROR; if (zwc->zbc == NULL) { zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem); if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0); } { int res = ZWRAP_initializeCStream(zwc, dictionary, dictLength, 0); if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); } zwc->comprState = ZWRAP_useReset; } return Z_OK; } ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush)) { ZWRAP_CCtx* zwc; if (!g_ZWRAP_useZSTDcompression) { int res; LOG_WRAPPERC("- deflate1 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); res = deflate(strm, flush); return res; } zwc = (ZWRAP_CCtx*) strm->state; if (zwc == NULL) { LOG_WRAPPERC("zwc == NULL\n"); return Z_STREAM_ERROR; } if (zwc->zbc == NULL) { int res; zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem); if (zwc->zbc == NULL) return ZWRAPC_finishWithError(zwc, strm, 0); res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : 0); if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset; } else { if (strm->total_in == 0) { if (zwc->comprState == ZWRAP_useReset) { size_t const errorCode = ZSTD_resetCStream(zwc->zbc, (flush == Z_FINISH) ? strm->avail_in : zwc->pledgedSrcSize); if (ZSTD_isError(errorCode)) { LOG_WRAPPERC("ERROR: ZSTD_resetCStream errorCode=%s\n", ZSTD_getErrorName(errorCode)); return ZWRAPC_finishWithError(zwc, strm, 0); } } else { int res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : 0); if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res); if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset; } } } LOG_WRAPPERC("- deflate1 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); if (strm->avail_in > 0) { zwc->inBuffer.src = strm->next_in; zwc->inBuffer.size = strm->avail_in; zwc->inBuffer.pos = 0; zwc->outBuffer.dst = strm->next_out; zwc->outBuffer.size = strm->avail_out; zwc->outBuffer.pos = 0; { size_t const errorCode = ZSTD_compressStream(zwc->zbc, &zwc->outBuffer, &zwc->inBuffer); LOG_WRAPPERC("deflate ZSTD_compressStream srcSize=%d dstCapacity=%d\n", (int)zwc->inBuffer.size, (int)zwc->outBuffer.size); if (ZSTD_isError(errorCode)) return ZWRAPC_finishWithError(zwc, strm, 0); } strm->next_out += zwc->outBuffer.pos; strm->total_out += zwc->outBuffer.pos; strm->avail_out -= zwc->outBuffer.pos; strm->total_in += zwc->inBuffer.pos; strm->next_in += zwc->inBuffer.pos; strm->avail_in -= zwc->inBuffer.pos; } if (flush == Z_FULL_FLUSH || flush == Z_BLOCK || flush == Z_TREES) return ZWRAPC_finishWithErrorMsg(strm, "Z_FULL_FLUSH, Z_BLOCK and Z_TREES are not supported!"); if (flush == Z_FINISH) { size_t bytesLeft; zwc->outBuffer.dst = strm->next_out; zwc->outBuffer.size = strm->avail_out; zwc->outBuffer.pos = 0; bytesLeft = ZSTD_endStream(zwc->zbc, &zwc->outBuffer); LOG_WRAPPERC("deflate ZSTD_endStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft); if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0); strm->next_out += zwc->outBuffer.pos; strm->total_out += zwc->outBuffer.pos; strm->avail_out -= zwc->outBuffer.pos; if (bytesLeft == 0) { LOG_WRAPPERC("Z_STREAM_END2 strm->total_in=%d strm->avail_out=%d strm->total_out=%d\n", (int)strm->total_in, (int)strm->avail_out, (int)strm->total_out); return Z_STREAM_END; } } else if (flush == Z_SYNC_FLUSH || flush == Z_PARTIAL_FLUSH) { size_t bytesLeft; zwc->outBuffer.dst = strm->next_out; zwc->outBuffer.size = strm->avail_out; zwc->outBuffer.pos = 0; bytesLeft = ZSTD_flushStream(zwc->zbc, &zwc->outBuffer); LOG_WRAPPERC("deflate ZSTD_flushStream dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)bytesLeft); if (ZSTD_isError(bytesLeft)) return ZWRAPC_finishWithError(zwc, strm, 0); strm->next_out += zwc->outBuffer.pos; strm->total_out += zwc->outBuffer.pos; strm->avail_out -= zwc->outBuffer.pos; } 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); return Z_OK; } ZEXTERN int ZEXPORT z_deflateEnd OF((z_streamp strm)) { if (!g_ZWRAP_useZSTDcompression) { LOG_WRAPPERC("- deflateEnd\n"); return deflateEnd(strm); } LOG_WRAPPERC("- deflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out)); { size_t errorCode; ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state; if (zwc == NULL) return Z_OK; /* structures are already freed */ strm->state = NULL; errorCode = ZWRAP_freeCCtx(zwc); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; } return Z_OK; } ZEXTERN uLong ZEXPORT z_deflateBound OF((z_streamp strm, uLong sourceLen)) { if (!g_ZWRAP_useZSTDcompression) return deflateBound(strm, sourceLen); return ZSTD_compressBound(sourceLen); } ZEXTERN int ZEXPORT z_deflateParams OF((z_streamp strm, int level, int strategy)) { if (!g_ZWRAP_useZSTDcompression) { LOG_WRAPPERC("- deflateParams level=%d strategy=%d\n", level, strategy); return deflateParams(strm, level, strategy); } return Z_OK; } /* *** Decompression *** */ typedef enum { ZWRAP_ZLIB_STREAM, ZWRAP_ZSTD_STREAM, ZWRAP_UNKNOWN_STREAM } ZWRAP_stream_type; typedef struct { ZSTD_DStream* zbd; char headerBuf[16]; /* should be equal or bigger than ZSTD_frameHeaderSize_min */ int errorCount; ZWRAP_state_t decompState; ZSTD_inBuffer inBuffer; ZSTD_outBuffer outBuffer; /* zlib params */ int stream_size; char *version; int windowBits; ZSTD_customMem customMem; z_stream allocFunc; /* copy of zalloc, zfree, opaque */ } ZWRAP_DCtx; int ZWRAP_isUsingZSTDdecompression(z_streamp strm) { if (strm == NULL) return 0; return (strm->reserved == ZWRAP_ZSTD_STREAM); } void ZWRAP_initDCtx(ZWRAP_DCtx* zwd) { zwd->errorCount = 0; zwd->outBuffer.pos = 0; zwd->outBuffer.size = 0; } ZWRAP_DCtx* ZWRAP_createDCtx(z_streamp strm) { ZWRAP_DCtx* zwd; if (strm->zalloc && strm->zfree) { zwd = (ZWRAP_DCtx*)strm->zalloc(strm->opaque, 1, sizeof(ZWRAP_DCtx)); if (zwd==NULL) return NULL; memset(zwd, 0, sizeof(ZWRAP_DCtx)); memcpy(&zwd->allocFunc, strm, sizeof(z_stream)); { ZSTD_customMem ZWRAP_customMem = { ZWRAP_allocFunction, ZWRAP_freeFunction, &zwd->allocFunc }; memcpy(&zwd->customMem, &ZWRAP_customMem, sizeof(ZSTD_customMem)); } } else { zwd = (ZWRAP_DCtx*)defaultCustomMem.customAlloc(defaultCustomMem.opaque, sizeof(ZWRAP_DCtx)); if (zwd==NULL) return NULL; memset(zwd, 0, sizeof(ZWRAP_DCtx)); memcpy(&zwd->customMem, &defaultCustomMem, sizeof(ZSTD_customMem)); } MEM_STATIC_ASSERT(sizeof(zwd->headerBuf) >= ZSTD_frameHeaderSize_min); /* if compilation fails here, assertion is false */ ZWRAP_initDCtx(zwd); return zwd; } size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd) { if (zwd==NULL) return 0; /* support free on null */ if (zwd->zbd) ZSTD_freeDStream(zwd->zbd); if (zwd->version) zwd->customMem.customFree(zwd->customMem.opaque, zwd->version); zwd->customMem.customFree(zwd->customMem.opaque, zwd); return 0; } int ZWRAPD_finishWithError(ZWRAP_DCtx* zwd, z_streamp strm, int error) { LOG_WRAPPERD("- ZWRAPD_finishWithError=%d\n", error); if (zwd) ZWRAP_freeDCtx(zwd); if (strm) strm->state = NULL; return (error) ? error : Z_STREAM_ERROR; } int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message) { ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state; strm->msg = message; if (zwd == NULL) return Z_STREAM_ERROR; return ZWRAPD_finishWithError(zwd, strm, 0); } ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm, const char *version, int stream_size)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) { strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */ return inflateInit(strm); } { ZWRAP_DCtx* zwd = ZWRAP_createDCtx(strm); LOG_WRAPPERD("- inflateInit\n"); if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0); zwd->version = zwd->customMem.customAlloc(zwd->customMem.opaque, strlen(version) + 1); if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0); strcpy(zwd->version, version); zwd->stream_size = stream_size; strm->state = (struct internal_state*) zwd; /* use state which in not used by user */ strm->total_in = 0; strm->total_out = 0; strm->reserved = ZWRAP_UNKNOWN_STREAM; /* mark as unknown steam */ strm->adler = 0; } return Z_OK; } ZEXTERN int ZEXPORT z_inflateInit2_ OF((z_streamp strm, int windowBits, const char *version, int stream_size)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) { return inflateInit2_(strm, windowBits, version, stream_size); } { int ret = z_inflateInit_ (strm, version, stream_size); if (ret == Z_OK) { ZWRAP_DCtx* zwd = (ZWRAP_DCtx*)strm->state; if (zwd == NULL) return Z_STREAM_ERROR; zwd->windowBits = windowBits; } return ret; } } int ZWRAP_inflateReset_keepDict(z_streamp strm) { LOG_WRAPPERD("- ZWRAP_inflateReset_keepDict\n"); if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateReset(strm); { ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state; if (zwd == NULL) return Z_STREAM_ERROR; ZWRAP_initDCtx(zwd); zwd->decompState = ZWRAP_useReset; } strm->total_in = 0; strm->total_out = 0; return Z_OK; } ZEXTERN int ZEXPORT z_inflateReset OF((z_streamp strm)) { LOG_WRAPPERD("- inflateReset\n"); if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateReset(strm); { int ret = ZWRAP_inflateReset_keepDict(strm); if (ret != Z_OK) return ret; } { ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state; if (zwd == NULL) return Z_STREAM_ERROR; zwd->decompState = ZWRAP_useInit; } return Z_OK; } #if ZLIB_VERNUM >= 0x1240 ZEXTERN int ZEXPORT z_inflateReset2 OF((z_streamp strm, int windowBits)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateReset2(strm, windowBits); { int ret = z_inflateReset (strm); if (ret == Z_OK) { ZWRAP_DCtx* zwd = (ZWRAP_DCtx*)strm->state; if (zwd == NULL) return Z_STREAM_ERROR; zwd->windowBits = windowBits; } return ret; } } #endif ZEXTERN int ZEXPORT z_inflateSetDictionary OF((z_streamp strm, const Bytef *dictionary, uInt dictLength)) { LOG_WRAPPERD("- inflateSetDictionary\n"); if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateSetDictionary(strm, dictionary, dictLength); { size_t errorCode; ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state; if (zwd == NULL || zwd->zbd == NULL) return Z_STREAM_ERROR; errorCode = ZSTD_initDStream_usingDict(zwd->zbd, dictionary, dictLength); if (ZSTD_isError(errorCode)) return ZWRAPD_finishWithError(zwd, strm, 0); zwd->decompState = ZWRAP_useReset; if (strm->total_in == ZSTD_HEADERSIZE) { zwd->inBuffer.src = zwd->headerBuf; zwd->inBuffer.size = strm->total_in; zwd->inBuffer.pos = 0; zwd->outBuffer.dst = strm->next_out; zwd->outBuffer.size = 0; zwd->outBuffer.pos = 0; errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); LOG_WRAPPERD("inflateSetDictionary ZSTD_decompressStream errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); if (zwd->inBuffer.pos < zwd->outBuffer.size || ZSTD_isError(errorCode)) { LOG_WRAPPERD("ERROR: ZSTD_decompressStream %s\n", ZSTD_getErrorName(errorCode)); return ZWRAPD_finishWithError(zwd, strm, 0); } } } return Z_OK; } ZEXTERN int ZEXPORT z_inflate OF((z_streamp strm, int flush)) { ZWRAP_DCtx* zwd; int res; if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { LOG_WRAPPERD("- inflate1 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); res = inflate(strm, flush); LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); return res; } if (strm->avail_in <= 0) return Z_OK; { size_t errorCode, srcSize; zwd = (ZWRAP_DCtx*) strm->state; LOG_WRAPPERD("- inflate1 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); if (zwd == NULL) return Z_STREAM_ERROR; if (zwd->decompState == ZWRAP_streamEnd) return Z_STREAM_END; if (strm->total_in < ZLIB_HEADERSIZE) { if (strm->total_in == 0 && strm->avail_in >= ZLIB_HEADERSIZE) { if (MEM_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) { if (zwd->windowBits) errorCode = inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size); else errorCode = inflateInit_(strm, zwd->version, zwd->stream_size); strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */ errorCode = ZWRAP_freeDCtx(zwd); if (ZSTD_isError(errorCode)) goto error; if (flush == Z_INFLATE_SYNC) res = inflateSync(strm); else res = inflate(strm, flush); LOG_WRAPPERD("- inflate3 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); return res; } } else { srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - strm->total_in); memcpy(zwd->headerBuf+strm->total_in, strm->next_in, srcSize); strm->total_in += srcSize; strm->next_in += srcSize; strm->avail_in -= srcSize; if (strm->total_in < ZLIB_HEADERSIZE) return Z_OK; if (MEM_readLE32(zwd->headerBuf) != ZSTD_MAGICNUMBER) { z_stream strm2; strm2.next_in = strm->next_in; strm2.avail_in = strm->avail_in; strm2.next_out = strm->next_out; strm2.avail_out = strm->avail_out; if (zwd->windowBits) errorCode = inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size); else errorCode = inflateInit_(strm, zwd->version, zwd->stream_size); LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", (int)errorCode); if (errorCode != Z_OK) return ZWRAPD_finishWithError(zwd, strm, (int)errorCode); /* inflate header */ strm->next_in = (unsigned char*)zwd->headerBuf; strm->avail_in = ZLIB_HEADERSIZE; strm->avail_out = 0; errorCode = inflate(strm, Z_NO_FLUSH); LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n", (int)errorCode, (int)strm->avail_in); if (errorCode != Z_OK) return ZWRAPD_finishWithError(zwd, strm, (int)errorCode); if (strm->avail_in > 0) goto error; strm->next_in = strm2.next_in; strm->avail_in = strm2.avail_in; strm->next_out = strm2.next_out; strm->avail_out = strm2.avail_out; strm->reserved = ZWRAP_ZLIB_STREAM; /* mark as zlib stream */ errorCode = ZWRAP_freeDCtx(zwd); if (ZSTD_isError(errorCode)) goto error; if (flush == Z_INFLATE_SYNC) res = inflateSync(strm); else res = inflate(strm, flush); LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, res); return res; } } } strm->reserved = ZWRAP_ZSTD_STREAM; /* mark as zstd steam */ if (flush == Z_INFLATE_SYNC) { strm->msg = "inflateSync is not supported!"; goto error; } if (!zwd->zbd) { zwd->zbd = ZSTD_createDStream_advanced(zwd->customMem); if (zwd->zbd == NULL) { LOG_WRAPPERD("ERROR: ZSTD_createDStream_advanced\n"); goto error; } zwd->decompState = ZWRAP_useInit; } if (strm->total_in < ZSTD_HEADERSIZE) { if (strm->total_in == 0 && strm->avail_in >= ZSTD_HEADERSIZE) { if (zwd->decompState == ZWRAP_useInit) { errorCode = ZSTD_initDStream(zwd->zbd); if (ZSTD_isError(errorCode)) { LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", ZSTD_getErrorName(errorCode)); goto error; } } else { errorCode = ZSTD_resetDStream(zwd->zbd); if (ZSTD_isError(errorCode)) goto error; } } else { srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - strm->total_in); memcpy(zwd->headerBuf+strm->total_in, strm->next_in, srcSize); strm->total_in += srcSize; strm->next_in += srcSize; strm->avail_in -= srcSize; if (strm->total_in < ZSTD_HEADERSIZE) return Z_OK; if (zwd->decompState == ZWRAP_useInit) { errorCode = ZSTD_initDStream(zwd->zbd); if (ZSTD_isError(errorCode)) { LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n", ZSTD_getErrorName(errorCode)); goto error; } } else { errorCode = ZSTD_resetDStream(zwd->zbd); if (ZSTD_isError(errorCode)) goto error; } zwd->inBuffer.src = zwd->headerBuf; zwd->inBuffer.size = ZSTD_HEADERSIZE; zwd->inBuffer.pos = 0; zwd->outBuffer.dst = strm->next_out; zwd->outBuffer.size = 0; zwd->outBuffer.pos = 0; errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size); if (ZSTD_isError(errorCode)) { LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(errorCode)); goto error; } if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */ } } zwd->inBuffer.src = strm->next_in; zwd->inBuffer.size = strm->avail_in; zwd->inBuffer.pos = 0; zwd->outBuffer.dst = strm->next_out; zwd->outBuffer.size = strm->avail_out; zwd->outBuffer.pos = 0; errorCode = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer); LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)strm->avail_in, (int)strm->avail_out); if (ZSTD_isError(errorCode)) { zwd->errorCount++; LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n", ZSTD_getErrorName(errorCode), zwd->errorCount); if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error; } LOG_WRAPPERD("inflate inBuffer.pos=%d inBuffer.size=%d outBuffer.pos=%d outBuffer.size=%d o\n", (int)zwd->inBuffer.pos, (int)zwd->inBuffer.size, (int)zwd->outBuffer.pos, (int)zwd->outBuffer.size); strm->next_out += zwd->outBuffer.pos; strm->total_out += zwd->outBuffer.pos; strm->avail_out -= zwd->outBuffer.pos; strm->total_in += zwd->inBuffer.pos; strm->next_in += zwd->inBuffer.pos; strm->avail_in -= zwd->inBuffer.pos; if (errorCode == 0) { LOG_WRAPPERD("inflate Z_STREAM_END1 avail_in=%d avail_out=%d total_in=%d total_out=%d\n", (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out); zwd->decompState = ZWRAP_streamEnd; return Z_STREAM_END; } } LOG_WRAPPERD("- inflate2 flush=%d avail_in=%d avail_out=%d total_in=%d total_out=%d res=%d\n", (int)flush, (int)strm->avail_in, (int)strm->avail_out, (int)strm->total_in, (int)strm->total_out, Z_OK); return Z_OK; error: return ZWRAPD_finishWithError(zwd, strm, 0); } ZEXTERN int ZEXPORT z_inflateEnd OF((z_streamp strm)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateEnd(strm); LOG_WRAPPERD("- inflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out)); { size_t errorCode; ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state; if (zwd == NULL) return Z_OK; /* structures are already freed */ strm->state = NULL; errorCode = ZWRAP_freeDCtx(zwd); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; } return Z_OK; } ZEXTERN int ZEXPORT z_inflateSync OF((z_streamp strm)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) { return inflateSync(strm); } return z_inflate(strm, Z_INFLATE_SYNC); } /* Advanced compression functions */ ZEXTERN int ZEXPORT z_deflateCopy OF((z_streamp dest, z_streamp source)) { if (!g_ZWRAP_useZSTDcompression) return deflateCopy(dest, source); return ZWRAPC_finishWithErrorMsg(source, "deflateCopy is not supported!"); } ZEXTERN int ZEXPORT z_deflateTune OF((z_streamp strm, int good_length, int max_lazy, int nice_length, int max_chain)) { if (!g_ZWRAP_useZSTDcompression) return deflateTune(strm, good_length, max_lazy, nice_length, max_chain); return ZWRAPC_finishWithErrorMsg(strm, "deflateTune is not supported!"); } #if ZLIB_VERNUM >= 0x1260 ZEXTERN int ZEXPORT z_deflatePending OF((z_streamp strm, unsigned *pending, int *bits)) { if (!g_ZWRAP_useZSTDcompression) return deflatePending(strm, pending, bits); return ZWRAPC_finishWithErrorMsg(strm, "deflatePending is not supported!"); } #endif ZEXTERN int ZEXPORT z_deflatePrime OF((z_streamp strm, int bits, int value)) { if (!g_ZWRAP_useZSTDcompression) return deflatePrime(strm, bits, value); return ZWRAPC_finishWithErrorMsg(strm, "deflatePrime is not supported!"); } ZEXTERN int ZEXPORT z_deflateSetHeader OF((z_streamp strm, gz_headerp head)) { if (!g_ZWRAP_useZSTDcompression) return deflateSetHeader(strm, head); return ZWRAPC_finishWithErrorMsg(strm, "deflateSetHeader is not supported!"); } /* Advanced decompression functions */ #if ZLIB_VERNUM >= 0x1280 ZEXTERN int ZEXPORT z_inflateGetDictionary OF((z_streamp strm, Bytef *dictionary, uInt *dictLength)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateGetDictionary(strm, dictionary, dictLength); return ZWRAPD_finishWithErrorMsg(strm, "inflateGetDictionary is not supported!"); } #endif ZEXTERN int ZEXPORT z_inflateCopy OF((z_streamp dest, z_streamp source)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !source->reserved) return inflateCopy(dest, source); return ZWRAPD_finishWithErrorMsg(source, "inflateCopy is not supported!"); } #if ZLIB_VERNUM >= 0x1240 ZEXTERN long ZEXPORT z_inflateMark OF((z_streamp strm)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateMark(strm); return ZWRAPD_finishWithErrorMsg(strm, "inflateMark is not supported!"); } #endif ZEXTERN int ZEXPORT z_inflatePrime OF((z_streamp strm, int bits, int value)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflatePrime(strm, bits, value); return ZWRAPD_finishWithErrorMsg(strm, "inflatePrime is not supported!"); } ZEXTERN int ZEXPORT z_inflateGetHeader OF((z_streamp strm, gz_headerp head)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateGetHeader(strm, head); return ZWRAPD_finishWithErrorMsg(strm, "inflateGetHeader is not supported!"); } ZEXTERN int ZEXPORT z_inflateBackInit_ OF((z_streamp strm, int windowBits, unsigned char FAR *window, const char *version, int stream_size)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateBackInit_(strm, windowBits, window, version, stream_size); return ZWRAPD_finishWithErrorMsg(strm, "inflateBackInit is not supported!"); } ZEXTERN int ZEXPORT z_inflateBack OF((z_streamp strm, in_func in, void FAR *in_desc, out_func out, void FAR *out_desc)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateBack(strm, in, in_desc, out, out_desc); return ZWRAPD_finishWithErrorMsg(strm, "inflateBack is not supported!"); } ZEXTERN int ZEXPORT z_inflateBackEnd OF((z_streamp strm)) { if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) return inflateBackEnd(strm); return ZWRAPD_finishWithErrorMsg(strm, "inflateBackEnd is not supported!"); } ZEXTERN uLong ZEXPORT z_zlibCompileFlags OF((void)) { return zlibCompileFlags(); }; /* utility functions */ #ifndef Z_SOLO ZEXTERN int ZEXPORT z_compress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)) { if (!g_ZWRAP_useZSTDcompression) return compress(dest, destLen, source, sourceLen); { size_t dstCapacity = *destLen; size_t const errorCode = ZSTD_compress(dest, dstCapacity, source, sourceLen, ZWRAP_DEFAULT_CLEVEL); LOG_WRAPPERD("z_compress sourceLen=%d dstCapacity=%d\n", (int)sourceLen, (int)dstCapacity); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; *destLen = errorCode; } return Z_OK; } ZEXTERN int ZEXPORT z_compress2 OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level)) { if (!g_ZWRAP_useZSTDcompression) return compress2(dest, destLen, source, sourceLen, level); { size_t dstCapacity = *destLen; size_t const errorCode = ZSTD_compress(dest, dstCapacity, source, sourceLen, level); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; *destLen = errorCode; } return Z_OK; } ZEXTERN uLong ZEXPORT z_compressBound OF((uLong sourceLen)) { if (!g_ZWRAP_useZSTDcompression) return compressBound(sourceLen); return ZSTD_compressBound(sourceLen); } ZEXTERN int ZEXPORT z_uncompress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)) { if (sourceLen < 4 || MEM_readLE32(source) != ZSTD_MAGICNUMBER) return uncompress(dest, destLen, source, sourceLen); { size_t dstCapacity = *destLen; size_t const errorCode = ZSTD_decompress(dest, dstCapacity, source, sourceLen); if (ZSTD_isError(errorCode)) return Z_STREAM_ERROR; *destLen = errorCode; } return Z_OK; } /* gzip file access functions */ ZEXTERN gzFile ZEXPORT z_gzopen OF((const char *path, const char *mode)) { if (!g_ZWRAP_useZSTDcompression) return gzopen(path, mode); FINISH_WITH_NULL_ERR("gzopen is not supported!"); } ZEXTERN gzFile ZEXPORT z_gzdopen OF((int fd, const char *mode)) { if (!g_ZWRAP_useZSTDcompression) return gzdopen(fd, mode); FINISH_WITH_NULL_ERR("gzdopen is not supported!"); } #if ZLIB_VERNUM >= 0x1240 ZEXTERN int ZEXPORT z_gzbuffer OF((gzFile file, unsigned size)) { if (!g_ZWRAP_useZSTDcompression) return gzbuffer(file, size); FINISH_WITH_GZ_ERR("gzbuffer is not supported!"); } ZEXTERN z_off_t ZEXPORT z_gzoffset OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzoffset(file); FINISH_WITH_GZ_ERR("gzoffset is not supported!"); } ZEXTERN int ZEXPORT z_gzclose_r OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzclose_r(file); FINISH_WITH_GZ_ERR("gzclose_r is not supported!"); } ZEXTERN int ZEXPORT z_gzclose_w OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzclose_w(file); FINISH_WITH_GZ_ERR("gzclose_w is not supported!"); } #endif ZEXTERN int ZEXPORT z_gzsetparams OF((gzFile file, int level, int strategy)) { if (!g_ZWRAP_useZSTDcompression) return gzsetparams(file, level, strategy); FINISH_WITH_GZ_ERR("gzsetparams is not supported!"); } ZEXTERN int ZEXPORT z_gzread OF((gzFile file, voidp buf, unsigned len)) { if (!g_ZWRAP_useZSTDcompression) return gzread(file, buf, len); FINISH_WITH_GZ_ERR("gzread is not supported!"); } ZEXTERN int ZEXPORT z_gzwrite OF((gzFile file, voidpc buf, unsigned len)) { if (!g_ZWRAP_useZSTDcompression) return gzwrite(file, buf, len); FINISH_WITH_GZ_ERR("gzwrite is not supported!"); } #if ZLIB_VERNUM >= 0x1260 ZEXTERN int ZEXPORTVA z_gzprintf Z_ARG((gzFile file, const char *format, ...)) #else ZEXTERN int ZEXPORTVA z_gzprintf OF((gzFile file, const char *format, ...)) #endif { if (!g_ZWRAP_useZSTDcompression) { int ret; char buf[1024]; va_list args; va_start (args, format); ret = vsprintf (buf, format, args); va_end (args); ret = gzprintf(file, buf); return ret; } FINISH_WITH_GZ_ERR("gzprintf is not supported!"); } ZEXTERN int ZEXPORT z_gzputs OF((gzFile file, const char *s)) { if (!g_ZWRAP_useZSTDcompression) return gzputs(file, s); FINISH_WITH_GZ_ERR("gzputs is not supported!"); } ZEXTERN char * ZEXPORT z_gzgets OF((gzFile file, char *buf, int len)) { if (!g_ZWRAP_useZSTDcompression) return gzgets(file, buf, len); FINISH_WITH_NULL_ERR("gzgets is not supported!"); } ZEXTERN int ZEXPORT z_gzputc OF((gzFile file, int c)) { if (!g_ZWRAP_useZSTDcompression) return gzputc(file, c); FINISH_WITH_GZ_ERR("gzputc is not supported!"); } #if ZLIB_VERNUM == 0x1260 ZEXTERN int ZEXPORT z_gzgetc_ OF((gzFile file)) #else ZEXTERN int ZEXPORT z_gzgetc OF((gzFile file)) #endif { if (!g_ZWRAP_useZSTDcompression) return gzgetc(file); FINISH_WITH_GZ_ERR("gzgetc is not supported!"); } ZEXTERN int ZEXPORT z_gzungetc OF((int c, gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzungetc(c, file); FINISH_WITH_GZ_ERR("gzungetc is not supported!"); } ZEXTERN int ZEXPORT z_gzflush OF((gzFile file, int flush)) { if (!g_ZWRAP_useZSTDcompression) return gzflush(file, flush); FINISH_WITH_GZ_ERR("gzflush is not supported!"); } ZEXTERN z_off_t ZEXPORT z_gzseek OF((gzFile file, z_off_t offset, int whence)) { if (!g_ZWRAP_useZSTDcompression) return gzseek(file, offset, whence); FINISH_WITH_GZ_ERR("gzseek is not supported!"); } ZEXTERN int ZEXPORT z_gzrewind OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzrewind(file); FINISH_WITH_GZ_ERR("gzrewind is not supported!"); } ZEXTERN z_off_t ZEXPORT z_gztell OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gztell(file); FINISH_WITH_GZ_ERR("gztell is not supported!"); } ZEXTERN int ZEXPORT z_gzeof OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzeof(file); FINISH_WITH_GZ_ERR("gzeof is not supported!"); } ZEXTERN int ZEXPORT z_gzdirect OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzdirect(file); FINISH_WITH_GZ_ERR("gzdirect is not supported!"); } ZEXTERN int ZEXPORT z_gzclose OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) return gzclose(file); FINISH_WITH_GZ_ERR("gzclose is not supported!"); } ZEXTERN const char * ZEXPORT z_gzerror OF((gzFile file, int *errnum)) { if (!g_ZWRAP_useZSTDcompression) return gzerror(file, errnum); FINISH_WITH_NULL_ERR("gzerror is not supported!"); } ZEXTERN void ZEXPORT z_gzclearerr OF((gzFile file)) { if (!g_ZWRAP_useZSTDcompression) gzclearerr(file); } #endif /* !Z_SOLO */ /* checksum functions */ ZEXTERN uLong ZEXPORT z_adler32 OF((uLong adler, const Bytef *buf, uInt len)) { return adler32(adler, buf, len); } ZEXTERN uLong ZEXPORT z_crc32 OF((uLong crc, const Bytef *buf, uInt len)) { return crc32(crc, buf, len); }