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- /*
- * Copyright (c) 2016-2021, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under both the BSD-style license (found in the
- * LICENSE file in the root directory of this source tree) and the GPLv2 (found
- * in the COPYING file in the root directory of this source tree).
- * You may select, at your option, one of the above-listed licenses.
- */
- /* === Tuning parameters === */
- #ifndef ZWRAP_USE_ZSTD
- #define ZWRAP_USE_ZSTD 0
- #endif
- /* === Dependencies === */
- #include <stdlib.h>
- #include <stdio.h> /* vsprintf */
- #include <stdarg.h> /* va_list, for z_gzprintf */
- #include <string.h>
- #define NO_DUMMY_DECL
- #define ZLIB_CONST
- #include <zlib.h> /* without #define Z_PREFIX */
- #include "zstd_zlibwrapper.h"
- #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_isFrame, ZSTD_MAGICNUMBER, ZSTD_customMem */
- #include "zstd.h"
- /* === Constants === */
- #define Z_INFLATE_SYNC 8
- #define ZLIB_HEADERSIZE 4
- #define ZSTD_HEADERSIZE ZSTD_FRAMEHEADERSIZE_MIN(ZSTD_f_zstd1)
- #define ZWRAP_DEFAULT_CLEVEL 3 /* Z_DEFAULT_COMPRESSION is translated to ZWRAP_DEFAULT_CLEVEL for zstd */
- /* === Debug === */
- #define LOG_WRAPPERC(...) /* fprintf(stderr, __VA_ARGS__) */
- #define LOG_WRAPPERD(...) /* fprintf(stderr, __VA_ARGS__) */
- #define FINISH_WITH_GZ_ERR(msg) { (void)msg; return Z_STREAM_ERROR; }
- #define FINISH_WITH_NULL_ERR(msg) { (void)msg; return NULL; }
- /* === Utility === */
- #define MIN(x,y) ((x) < (y) ? (x) : (y))
- static unsigned ZWRAP_isLittleEndian(void)
- {
- const union { unsigned u; char c[4]; } one = { 1 }; /* don't use static : performance detrimental */
- return one.c[0];
- }
- #ifndef __has_builtin
- # define __has_builtin(x) 0
- #endif
- static unsigned ZWRAP_swap32(unsigned in)
- {
- #if defined(_MSC_VER) /* Visual Studio */
- return _byteswap_ulong(in);
- #elif (defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403)) \
- || (defined(__clang__) && __has_builtin(__builtin_bswap32))
- return __builtin_bswap32(in);
- #else
- return ((in << 24) & 0xff000000 ) |
- ((in << 8) & 0x00ff0000 ) |
- ((in >> 8) & 0x0000ff00 ) |
- ((in >> 24) & 0x000000ff );
- #endif
- }
- static unsigned ZWRAP_readLE32(const void* ptr)
- {
- unsigned value;
- memcpy(&value, ptr, sizeof(value));
- if (ZWRAP_isLittleEndian())
- return value;
- else
- return ZWRAP_swap32(value);
- }
- /* === Wrapper === */
- 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, (uInt)size);
- /* LOG_WRAPPERC("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) LOG_WRAPPERC("ZWRAP free %p \n", address); */
- }
- static void* ZWRAP_customMalloc(size_t size, ZSTD_customMem customMem)
- {
- if (customMem.customAlloc)
- return customMem.customAlloc(customMem.opaque, size);
- return malloc(size);
- }
- static void* ZWRAP_customCalloc(size_t size, ZSTD_customMem customMem)
- {
- if (customMem.customAlloc) {
- /* calloc implemented as malloc+memset;
- * not as efficient as calloc, but next best guess for custom malloc */
- void* const ptr = customMem.customAlloc(customMem.opaque, size);
- memset(ptr, 0, size);
- return ptr;
- }
- return calloc(1, size);
- }
- static void ZWRAP_customFree(void* ptr, ZSTD_customMem customMem)
- {
- if (ptr!=NULL) {
- if (customMem.customFree)
- customMem.customFree(customMem.opaque, ptr);
- else
- free(ptr);
- }
- }
- /* === Compression === */
- typedef enum { ZWRAP_useInit, ZWRAP_useReset, ZWRAP_streamEnd } ZWRAP_state_t;
- typedef struct {
- ZSTD_CStream* zbc;
- int compressionLevel;
- int streamEnd; /* a flag to signal the end of a stream */
- unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
- 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;
- /* typedef ZWRAP_CCtx internal_state; */
- static size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc)
- {
- if (zwc==NULL) return 0; /* support free on NULL */
- ZSTD_freeCStream(zwc->zbc);
- ZWRAP_customFree(zwc, zwc->customMem);
- return 0;
- }
- static ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm)
- {
- ZWRAP_CCtx* zwc;
- ZSTD_customMem customMem = { NULL, NULL, NULL };
- if (strm->zalloc && strm->zfree) {
- customMem.customAlloc = ZWRAP_allocFunction;
- customMem.customFree = ZWRAP_freeFunction;
- }
- customMem.opaque = strm;
- zwc = (ZWRAP_CCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_CCtx), customMem);
- if (zwc == NULL) return NULL;
- zwc->allocFunc = *strm;
- customMem.opaque = &zwc->allocFunc;
- zwc->customMem = customMem;
- return zwc;
- }
- static 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 initErr;
- LOG_WRAPPERC("pledgedSrcSize=%d windowLog=%d chainLog=%d hashLog=%d searchLog=%d minMatch=%d strategy=%d\n",
- (int)pledgedSrcSize, params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.minMatch, params.cParams.strategy);
- initErr = ZSTD_initCStream_advanced(zwc->zbc, dict, dictSize, params, pledgedSrcSize);
- if (ZSTD_isError(initErr)) return Z_STREAM_ERROR;
- }
- return Z_OK;
- }
- static 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;
- }
- static 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;
- }
- static struct internal_state* convert_into_sis(void* ptr)
- {
- return (struct internal_state*) ptr;
- }
- 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->streamEnd = 0;
- zwc->totalInBytes = 0;
- zwc->compressionLevel = level;
- strm->state = convert_into_sis(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);
- { ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
- if (zwc) {
- zwc->streamEnd = 0;
- zwc->totalInBytes = 0;
- }
- }
- 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 = ZWRAP_useInit;
- }
- 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, ZSTD_CONTENTSIZE_UNKNOWN);
- 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) {
- 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);
- return deflate(strm, flush);
- }
- zwc = (ZWRAP_CCtx*) strm->state;
- if (zwc == NULL) { LOG_WRAPPERC("zwc == NULL\n"); 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 const initErr = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
- if (initErr != Z_OK) return ZWRAPC_finishWithError(zwc, strm, initErr); }
- if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
- } else {
- if (zwc->totalInBytes == 0) {
- if (zwc->comprState == ZWRAP_useReset) {
- size_t resetErr = ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only);
- if (ZSTD_isError(resetErr)) {
- LOG_WRAPPERC("ERROR: ZSTD_CCtx_reset errorCode=%s\n",
- ZSTD_getErrorName(resetErr));
- return ZWRAPC_finishWithError(zwc, strm, 0);
- }
- resetErr = ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, (flush == Z_FINISH) ? strm->avail_in : zwc->pledgedSrcSize);
- if (ZSTD_isError(resetErr)) {
- LOG_WRAPPERC("ERROR: ZSTD_CCtx_setPledgedSrcSize errorCode=%s\n",
- ZSTD_getErrorName(resetErr));
- return ZWRAPC_finishWithError(zwc, strm, 0);
- }
- } else {
- int const res = ZWRAP_initializeCStream(zwc, NULL, 0, (flush == Z_FINISH) ? strm->avail_in : ZSTD_CONTENTSIZE_UNKNOWN);
- if (res != Z_OK) return ZWRAPC_finishWithError(zwc, strm, res);
- if (flush != Z_FINISH) zwc->comprState = ZWRAP_useReset;
- }
- } /* (zwc->totalInBytes == 0) */
- } /* ! (zwc->zbc == NULL) */
- 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);
- 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 cErr = 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(cErr)) 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;
- zwc->totalInBytes += zwc->inBuffer.pos;
- strm->next_in += zwc->inBuffer.pos;
- strm->avail_in -= zwc->inBuffer.pos;
- }
- if (flush == Z_FULL_FLUSH
- #if ZLIB_VERNUM >= 0x1240
- || flush == Z_TREES
- #endif
- || flush == Z_BLOCK)
- return ZWRAPC_finishWithErrorMsg(strm, "Z_FULL_FLUSH, Z_BLOCK and Z_TREES are not supported!");
- if (flush == Z_FINISH) {
- size_t bytesLeft;
- if (zwc->streamEnd) return Z_STREAM_END;
- 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) {
- zwc->streamEnd = 1;
- 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("- 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);
- 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]; /* must be >= ZSTD_frameHeaderSize_min */
- int errorCount;
- unsigned long long totalInBytes; /* we need it as strm->total_in can be reset by user */
- 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; /* just to copy zalloc, zfree, opaque */
- } ZWRAP_DCtx;
- static void ZWRAP_initDCtx(ZWRAP_DCtx* zwd)
- {
- zwd->errorCount = 0;
- zwd->outBuffer.pos = 0;
- zwd->outBuffer.size = 0;
- }
- static ZWRAP_DCtx* ZWRAP_createDCtx(z_streamp strm)
- {
- ZWRAP_DCtx* zwd;
- ZSTD_customMem customMem = { NULL, NULL, NULL };
- if (strm->zalloc && strm->zfree) {
- customMem.customAlloc = ZWRAP_allocFunction;
- customMem.customFree = ZWRAP_freeFunction;
- }
- customMem.opaque = strm;
- zwd = (ZWRAP_DCtx*)ZWRAP_customCalloc(sizeof(ZWRAP_DCtx), customMem);
- if (zwd == NULL) return NULL;
- zwd->allocFunc = *strm;
- customMem.opaque = &zwd->allocFunc;
- zwd->customMem = customMem;
- ZWRAP_initDCtx(zwd);
- return zwd;
- }
- static size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd)
- {
- if (zwd==NULL) return 0; /* support free on null */
- ZSTD_freeDStream(zwd->zbd);
- ZWRAP_customFree(zwd->version, zwd->customMem);
- ZWRAP_customFree(zwd, zwd->customMem);
- return 0;
- }
- int ZWRAP_isUsingZSTDdecompression(z_streamp strm)
- {
- if (strm == NULL) return 0;
- return (strm->reserved == ZWRAP_ZSTD_STREAM);
- }
- static int ZWRAPD_finishWithError(ZWRAP_DCtx* zwd, z_streamp strm, int error)
- {
- LOG_WRAPPERD("- ZWRAPD_finishWithError=%d\n", error);
- ZWRAP_freeDCtx(zwd);
- strm->state = NULL;
- return (error) ? error : Z_STREAM_ERROR;
- }
- static int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message)
- {
- ZWRAP_DCtx* const 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;
- return inflateInit(strm);
- }
- { ZWRAP_DCtx* const zwd = ZWRAP_createDCtx(strm);
- LOG_WRAPPERD("- inflateInit\n");
- if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
- zwd->version = (char*)ZWRAP_customMalloc(strlen(version)+1, zwd->customMem);
- if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
- strcpy(zwd->version, version);
- zwd->stream_size = stream_size;
- zwd->totalInBytes = 0;
- strm->state = convert_into_sis(zwd);
- strm->total_in = 0;
- strm->total_out = 0;
- strm->reserved = ZWRAP_UNKNOWN_STREAM;
- 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 const ret = z_inflateInit_ (strm, version, stream_size);
- LOG_WRAPPERD("- inflateInit2 windowBits=%d\n", windowBits);
- if (ret == Z_OK) {
- ZWRAP_DCtx* const 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* const zwd = (ZWRAP_DCtx*) strm->state;
- if (zwd == NULL) return Z_STREAM_ERROR;
- ZWRAP_initDCtx(zwd);
- zwd->decompState = ZWRAP_useReset;
- zwd->totalInBytes = 0;
- }
- 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 const ret = ZWRAP_inflateReset_keepDict(strm);
- if (ret != Z_OK) return ret; }
- { ZWRAP_DCtx* const 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 const ret = z_inflateReset (strm);
- if (ret == Z_OK) {
- ZWRAP_DCtx* const 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);
- { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
- if (zwd == NULL || zwd->zbd == NULL) return Z_STREAM_ERROR;
- { size_t const initErr = ZSTD_initDStream_usingDict(zwd->zbd, dictionary, dictLength);
- if (ZSTD_isError(initErr)) return ZWRAPD_finishWithError(zwd, strm, 0); }
- zwd->decompState = ZWRAP_useReset;
- if (zwd->totalInBytes == ZSTD_HEADERSIZE) {
- zwd->inBuffer.src = zwd->headerBuf;
- zwd->inBuffer.size = zwd->totalInBytes;
- zwd->inBuffer.pos = 0;
- zwd->outBuffer.dst = strm->next_out;
- zwd->outBuffer.size = 0;
- zwd->outBuffer.pos = 0;
- { size_t const 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;
- if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB || !strm->reserved) {
- int const result = 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, result);
- return result;
- }
- if (strm->avail_in <= 0) return Z_OK;
- 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 (zwd->totalInBytes < ZLIB_HEADERSIZE) {
- if (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) {
- if (ZWRAP_readLE32(strm->next_in) != ZSTD_MAGICNUMBER) {
- { int const initErr = (zwd->windowBits) ?
- inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
- inflateInit_(strm, zwd->version, zwd->stream_size);
- LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
- if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
- }
- strm->reserved = ZWRAP_ZLIB_STREAM;
- { size_t const freeErr = ZWRAP_freeDCtx(zwd);
- if (ZSTD_isError(freeErr)) goto error; }
- { int const result = (flush == Z_INFLATE_SYNC) ?
- inflateSync(strm) :
- 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 result;
- } }
- } else { /* ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
- size_t const srcSize = MIN(strm->avail_in, ZLIB_HEADERSIZE - zwd->totalInBytes);
- memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
- strm->total_in += srcSize;
- zwd->totalInBytes += srcSize;
- strm->next_in += srcSize;
- strm->avail_in -= srcSize;
- if (zwd->totalInBytes < ZLIB_HEADERSIZE) return Z_OK;
- if (ZWRAP_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;
- { int const initErr = (zwd->windowBits) ?
- inflateInit2_(strm, zwd->windowBits, zwd->version, zwd->stream_size) :
- inflateInit_(strm, zwd->version, zwd->stream_size);
- LOG_WRAPPERD("ZLIB inflateInit errorCode=%d\n", initErr);
- if (initErr != Z_OK) return ZWRAPD_finishWithError(zwd, strm, initErr);
- }
- /* inflate header */
- strm->next_in = (unsigned char*)zwd->headerBuf;
- strm->avail_in = ZLIB_HEADERSIZE;
- strm->avail_out = 0;
- { int const dErr = inflate(strm, Z_NO_FLUSH);
- LOG_WRAPPERD("ZLIB inflate errorCode=%d strm->avail_in=%d\n",
- dErr, (int)strm->avail_in);
- if (dErr != Z_OK)
- return ZWRAPD_finishWithError(zwd, strm, dErr);
- }
- 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 */
- { size_t const freeErr = ZWRAP_freeDCtx(zwd);
- if (ZSTD_isError(freeErr)) goto error; }
- { int const result = (flush == Z_INFLATE_SYNC) ?
- inflateSync(strm) :
- 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 result;
- } } } /* if ! (zwd->totalInBytes == 0 && strm->avail_in >= ZLIB_HEADERSIZE) */
- } /* (zwd->totalInBytes < ZLIB_HEADERSIZE) */
- 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 (zwd->totalInBytes < ZSTD_HEADERSIZE) {
- if (zwd->totalInBytes == 0 && strm->avail_in >= ZSTD_HEADERSIZE) {
- if (zwd->decompState == ZWRAP_useInit) {
- size_t const initErr = ZSTD_initDStream(zwd->zbd);
- if (ZSTD_isError(initErr)) {
- LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
- ZSTD_getErrorName(initErr));
- goto error;
- }
- } else {
- size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only);
- if (ZSTD_isError(resetErr)) goto error;
- }
- } else {
- size_t const srcSize = MIN(strm->avail_in, ZSTD_HEADERSIZE - zwd->totalInBytes);
- memcpy(zwd->headerBuf+zwd->totalInBytes, strm->next_in, srcSize);
- strm->total_in += srcSize;
- zwd->totalInBytes += srcSize;
- strm->next_in += srcSize;
- strm->avail_in -= srcSize;
- if (zwd->totalInBytes < ZSTD_HEADERSIZE) return Z_OK;
- if (zwd->decompState == ZWRAP_useInit) {
- size_t const initErr = ZSTD_initDStream(zwd->zbd);
- if (ZSTD_isError(initErr)) {
- LOG_WRAPPERD("ERROR: ZSTD_initDStream errorCode=%s\n",
- ZSTD_getErrorName(initErr));
- goto error;
- }
- } else {
- size_t const resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only);
- if (ZSTD_isError(resetErr)) 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;
- { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
- LOG_WRAPPERD("inflate ZSTD_decompressStream1 errorCode=%d srcSize=%d dstCapacity=%d\n",
- (int)dErr, (int)zwd->inBuffer.size, (int)zwd->outBuffer.size);
- if (ZSTD_isError(dErr)) {
- LOG_WRAPPERD("ERROR: ZSTD_decompressStream1 %s\n", ZSTD_getErrorName(dErr));
- goto error;
- } }
- if (zwd->inBuffer.pos != zwd->inBuffer.size) goto error; /* not consumed */
- }
- } /* (zwd->totalInBytes < ZSTD_HEADERSIZE) */
- 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;
- { size_t const dErr = ZSTD_decompressStream(zwd->zbd, &zwd->outBuffer, &zwd->inBuffer);
- LOG_WRAPPERD("inflate ZSTD_decompressStream2 errorCode=%d srcSize=%d dstCapacity=%d\n",
- (int)dErr, (int)strm->avail_in, (int)strm->avail_out);
- if (ZSTD_isError(dErr)) {
- zwd->errorCount++;
- LOG_WRAPPERD("ERROR: ZSTD_decompressStream2 %s zwd->errorCount=%d\n",
- ZSTD_getErrorName(dErr), 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;
- zwd->totalInBytes += zwd->inBuffer.pos;
- strm->next_in += zwd->inBuffer.pos;
- strm->avail_in -= zwd->inBuffer.pos;
- if (dErr == 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;
- }
- } /* dErr lifetime */
- 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));
- { ZWRAP_DCtx* const zwd = (ZWRAP_DCtx*) strm->state;
- if (zwd == NULL) return Z_OK; /* structures are already freed */
- { size_t const freeErr = ZWRAP_freeDCtx(zwd);
- if (ZSTD_isError(freeErr)) return Z_STREAM_ERROR; }
- strm->state = NULL;
- }
- 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 cSize = 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(cSize)) return Z_STREAM_ERROR;
- *destLen = cSize;
- }
- 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 cSize = ZSTD_compress(dest, dstCapacity, source, sourceLen, level);
- if (ZSTD_isError(cSize)) return Z_STREAM_ERROR;
- *destLen = cSize;
- }
- 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 (!ZSTD_isFrame(source, sourceLen))
- return uncompress(dest, destLen, source, sourceLen);
- { size_t dstCapacity = *destLen;
- size_t const dSize = ZSTD_decompress(dest, dstCapacity, source, sourceLen);
- if (ZSTD_isError(dSize)) return Z_STREAM_ERROR;
- *destLen = dSize;
- }
- return Z_OK;
- }
- #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);
- }
- #if ZLIB_VERNUM >= 0x12B0
- ZEXTERN uLong ZEXPORT z_adler32_z OF((uLong adler, const Bytef *buf, z_size_t len))
- {
- return adler32_z(adler, buf, len);
- }
- ZEXTERN uLong ZEXPORT z_crc32_z OF((uLong crc, const Bytef *buf, z_size_t len))
- {
- return crc32_z(crc, buf, len);
- }
- #endif
- #if ZLIB_VERNUM >= 0x1270
- ZEXTERN const z_crc_t FAR * ZEXPORT z_get_crc_table OF((void))
- {
- return get_crc_table();
- }
- #endif
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