--- /dev/null
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * 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 _Z_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;
+ { unsigned initErr = 0;
+ ZSTD_parameters const params = ZSTD_getParams(zwc->compressionLevel, pledgedSrcSize, dictSize);
+ ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams();
+ if (!cctxParams) return Z_STREAM_ERROR;
+ 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_isError(ZSTD_CCtx_reset(zwc->zbc, ZSTD_reset_session_only));
+ initErr |= ZSTD_isError(ZSTD_CCtxParams_init_advanced(cctxParams, params));
+ initErr |= ZSTD_isError(ZSTD_CCtx_setParametersUsingCCtxParams(zwc->zbc, cctxParams));
+ initErr |= ZSTD_isError(ZSTD_CCtx_setPledgedSrcSize(zwc->zbc, pledgedSrcSize));
+ initErr |= ZSTD_isError(ZSTD_CCtx_loadDictionary(zwc->zbc, dict, dictSize));
+
+ ZSTD_freeCCtxParams(cctxParams);
+ if (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_ _Z_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_ _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_OF((z_streamp strm,
+ uLong sourceLen))
+{
+ if (!g_ZWRAP_useZSTDcompression)
+ return deflateBound(strm, sourceLen);
+
+ return ZSTD_compressBound(sourceLen);
+}
+
+
+ZEXTERN int ZEXPORT z_deflateParams _Z_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_ _Z_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_ _Z_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 _Z_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 _Z_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 _Z_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 resetErr = ZSTD_DCtx_reset(zwd->zbd, ZSTD_reset_session_only);
+ if (ZSTD_isError(resetErr)) return ZWRAPD_finishWithError(zwd, strm, 0); }
+ { size_t const loadErr = ZSTD_DCtx_loadDictionary(zwd->zbd, dictionary, dictLength);
+ if (ZSTD_isError(loadErr)) 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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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 _Z_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_ _Z_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 _Z_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 _Z_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 _Z_OF((void)) { return zlibCompileFlags(); }
+
+
+
+ /* === utility functions === */
+#ifndef Z_SOLO
+
+ZEXTERN int ZEXPORT z_compress _Z_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 _Z_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 _Z_OF((uLong sourceLen))
+{
+ if (!g_ZWRAP_useZSTDcompression)
+ return compressBound(sourceLen);
+
+ return ZSTD_compressBound(sourceLen);
+}
+
+
+ZEXTERN int ZEXPORT z_uncompress _Z_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 _Z_OF((uLong adler, const Bytef *buf, uInt len))
+{
+ return adler32(adler, buf, len);
+}
+
+ZEXTERN uLong ZEXPORT z_crc32 _Z_OF((uLong crc, const Bytef *buf, uInt len))
+{
+ return crc32(crc, buf, len);
+}
+
+
+#if ZLIB_VERNUM >= 0x12B0
+ZEXTERN uLong ZEXPORT z_adler32_z _Z_OF((uLong adler, const Bytef *buf, z_size_t len))
+{
+ return adler32_z(adler, buf, len);
+}
+
+ZEXTERN uLong ZEXPORT z_crc32_z _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 _Z_OF((void))
+{
+ return get_crc_table();
+}
+#endif
+
+ /* Error function */
+ZEXTERN const char * ZEXPORT z_zError _Z_OF((int err))
+{
+ /* Just use zlib Error function */
+ return zError(err);
+}
notaz.gp2x.de / pcsx_rearmed.git / blobdiff