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zstd/zlibWrapper/zstd_zlibwrapper.c

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/**
* 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 <stdio.h> /* vsprintf */
#include <stdarg.h> /* va_list, for z_gzprintf */
#include <zlib.h>
#include "zstd_zlibwrapper.h"
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_MAGICNUMBER */
#include "zstd.h"
#define ZBUFF_STATIC_LINKING_ONLY /* ZBUFF_createCCtx_advanced */
#include "zbuff.h"
#include "zstd_internal.h" /* defaultCustomMem */
#define Z_INFLATE_SYNC 8
#define ZWRAP_HEADERSIZE 4
#define ZWRAP_DEFAULT_CLEVEL 5 /* Z_DEFAULT_COMPRESSION is translated to ZWRAP_DEFAULT_CLEVEL for zstd */
#define LOG_WRAPPER(...) /* printf(__VA_ARGS__) */
#define FINISH_WITH_GZ_ERR(msg) { \
(void)msg; \
return Z_MEM_ERROR; \
}
#define FINISH_WITH_ERR(strm, message) { \
strm->msg = message; \
return Z_MEM_ERROR; \
}
#define FINISH_WITH_NULL_ERR(msg) { \
(void)msg; \
return NULL; \
}
#ifndef ZWRAP_USE_ZSTD
#define ZWRAP_USE_ZSTD 0
#endif
static int g_useZSTD = ZWRAP_USE_ZSTD; /* 0 = don't use ZSTD */
void useZSTD(int turn_on) { g_useZSTD = turn_on; }
int isUsingZSTD(void) { return g_useZSTD; }
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 struct {
ZBUFF_CCtx* zbc;
size_t bytesLeft;
int compressionLevel;
ZSTD_customMem customMem;
z_stream allocFunc; /* copy of zalloc, zfree, opaque */
} ZWRAP_CCtx;
size_t ZWRAP_freeCCtx(ZWRAP_CCtx* zwc)
{
if (zwc==NULL) return 0; /* support free on NULL */
ZBUFF_freeCCtx(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));
}
zwc->zbc = ZBUFF_createCCtx_advanced(zwc->customMem);
if (zwc->zbc == NULL) { ZWRAP_freeCCtx(zwc); return NULL; }
return zwc;
}
ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level,
const char *version, int stream_size))
{
ZWRAP_CCtx* zwc;
if (!g_useZSTD) {
LOG_WRAPPER("- deflateInit level=%d\n", level);
return deflateInit_((strm), (level), version, stream_size);
}
LOG_WRAPPER("- deflateInit level=%d\n", level);
zwc = ZWRAP_createCCtx(strm);
if (zwc == NULL) return Z_MEM_ERROR;
if (level == Z_DEFAULT_COMPRESSION)
level = ZWRAP_DEFAULT_CLEVEL;
{ size_t const errorCode = ZBUFF_compressInit(zwc->zbc, level);
if (ZSTD_isError(errorCode)) return Z_MEM_ERROR; }
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;
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_useZSTD)
return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, version, stream_size);
return z_deflateInit_ (strm, level, version, stream_size);
}
ZEXTERN int ZEXPORT z_deflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dictLength))
{
if (!g_useZSTD)
return deflateSetDictionary(strm, dictionary, dictLength);
{ ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
LOG_WRAPPER("- deflateSetDictionary level=%d\n", (int)strm->data_type);
{ size_t const errorCode = ZBUFF_compressInitDictionary(zwc->zbc, dictionary, dictLength, zwc->compressionLevel);
if (ZSTD_isError(errorCode)) return Z_MEM_ERROR; }
}
return Z_OK;
}
ZEXTERN int ZEXPORT z_deflate OF((z_streamp strm, int flush))
{
ZWRAP_CCtx* zwc;
if (!g_useZSTD) {
int res = deflate(strm, flush);
LOG_WRAPPER("- avail_in=%d total_in=%d total_out=%d\n", (int)strm->avail_in, (int)strm->total_in, (int)strm->total_out);
return res;
}
zwc = (ZWRAP_CCtx*) strm->state;
LOG_WRAPPER("deflate 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) {
size_t dstCapacity = strm->avail_out;
size_t srcSize = strm->avail_in;
size_t const errorCode = ZBUFF_compressContinue(zwc->zbc, strm->next_out, &dstCapacity, strm->next_in, &srcSize);
LOG_WRAPPER("ZBUFF_compressContinue srcSize=%d dstCapacity=%d\n", (int)srcSize, (int)dstCapacity);
if (ZSTD_isError(errorCode)) return Z_MEM_ERROR;
strm->next_out += dstCapacity;
strm->total_out += dstCapacity;
strm->avail_out -= dstCapacity;
strm->total_in += srcSize;
strm->next_in += srcSize;
strm->avail_in -= srcSize;
}
if (flush == Z_FULL_FLUSH) FINISH_WITH_ERR(strm, "Z_FULL_FLUSH is not supported!");
if (flush == Z_FINISH) {
size_t bytesLeft;
size_t dstCapacity = strm->avail_out;
if (zwc->bytesLeft) {
bytesLeft = ZBUFF_compressFlush(zwc->zbc, strm->next_out, &dstCapacity);
LOG_WRAPPER("ZBUFF_compressFlush avail_out=%d dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)dstCapacity, (int)bytesLeft);
} else {
bytesLeft = ZBUFF_compressEnd(zwc->zbc, strm->next_out, &dstCapacity);
LOG_WRAPPER("ZBUFF_compressEnd dstCapacity=%d bytesLeft=%d\n", (int)dstCapacity, (int)bytesLeft);
}
if (ZSTD_isError(bytesLeft)) return Z_MEM_ERROR;
strm->next_out += dstCapacity;
strm->total_out += dstCapacity;
strm->avail_out -= dstCapacity;
if (flush == Z_FINISH && bytesLeft == 0) return Z_STREAM_END;
zwc->bytesLeft = bytesLeft;
}
if (flush == Z_SYNC_FLUSH) {
size_t bytesLeft;
size_t dstCapacity = strm->avail_out;
bytesLeft = ZBUFF_compressFlush(zwc->zbc, strm->next_out, &dstCapacity);
LOG_WRAPPER("ZBUFF_compressFlush avail_out=%d dstCapacity=%d bytesLeft=%d\n", (int)strm->avail_out, (int)dstCapacity, (int)bytesLeft);
if (ZSTD_isError(bytesLeft)) return Z_MEM_ERROR;
strm->next_out += dstCapacity;
strm->total_out += dstCapacity;
strm->avail_out -= dstCapacity;
zwc->bytesLeft = bytesLeft;
}
return Z_OK;
}
ZEXTERN int ZEXPORT z_deflateEnd OF((z_streamp strm))
{
if (!g_useZSTD) {
LOG_WRAPPER("- deflateEnd\n");
return deflateEnd(strm);
}
LOG_WRAPPER("- deflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out));
{ ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
size_t const errorCode = ZWRAP_freeCCtx(zwc);
if (ZSTD_isError(errorCode)) return Z_MEM_ERROR;
}
return Z_OK;
}
ZEXTERN uLong ZEXPORT z_deflateBound OF((z_streamp strm,
uLong sourceLen))
{
if (!g_useZSTD)
return deflateBound(strm, sourceLen);
return ZSTD_compressBound(sourceLen);
}
ZEXTERN int ZEXPORT z_deflateParams OF((z_streamp strm,
int level,
int strategy))
{
if (!g_useZSTD) {
LOG_WRAPPER("- deflateParams level=%d strategy=%d\n", level, strategy);
return deflateParams(strm, level, strategy);
}
return Z_OK;
}
/* *** Decompression *** */
typedef struct {
ZBUFF_DCtx* zbd;
char headerBuf[ZWRAP_HEADERSIZE];
int errorCount;
/* zlib params */
int stream_size;
char *version;
int windowBits;
ZSTD_customMem customMem;
z_stream allocFunc; /* copy of zalloc, zfree, opaque */
} ZWRAP_DCtx;
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));
}
return zwd;
}
size_t ZWRAP_freeDCtx(ZWRAP_DCtx* zwd)
{
if (zwd==NULL) return 0; /* support free on null */
ZBUFF_freeDCtx(zwd->zbd);
if (zwd->version) zwd->customMem.customFree(zwd->customMem.opaque, zwd->version);
zwd->customMem.customFree(zwd->customMem.opaque, zwd);
return 0;
}
ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm,
const char *version, int stream_size))
{
ZWRAP_DCtx* zwd = ZWRAP_createDCtx(strm);
LOG_WRAPPER("- inflateInit\n");
if (zwd == NULL) { strm->state = NULL; return Z_MEM_ERROR; }
zwd->version = zwd->customMem.customAlloc(zwd->customMem.opaque, strlen(version) + 1);
if (zwd->version == NULL) { ZWRAP_freeDCtx(zwd); strm->state = NULL; return Z_MEM_ERROR; }
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 = 1; /* mark as unknown steam */
return Z_OK;
}
ZEXTERN int ZEXPORT z_inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size))
{
int ret = z_inflateInit_ (strm, version, stream_size);
if (ret == Z_OK) {
ZWRAP_DCtx* zwd = (ZWRAP_DCtx*)strm->state;
zwd->windowBits = windowBits;
}
return ret;
}
ZEXTERN int ZEXPORT z_inflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dictLength))
{
if (!strm->reserved)
return inflateSetDictionary(strm, dictionary, dictLength);
LOG_WRAPPER("- inflateSetDictionary\n");
{ size_t errorCode;
ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state;
if (strm->state == NULL) return Z_MEM_ERROR;
errorCode = ZBUFF_decompressInitDictionary(zwd->zbd, dictionary, dictLength);
if (ZSTD_isError(errorCode)) { ZWRAP_freeDCtx(zwd); strm->state = NULL; return Z_MEM_ERROR; }
if (strm->total_in == ZSTD_frameHeaderSize_min) {
size_t dstCapacity = 0;
size_t srcSize = strm->total_in;
errorCode = ZBUFF_decompressContinue(zwd->zbd, strm->next_out, &dstCapacity, zwd->headerBuf, &srcSize);
LOG_WRAPPER("ZBUFF_decompressContinue3 errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)srcSize, (int)dstCapacity);
if (dstCapacity > 0 || ZSTD_isError(errorCode)) {
LOG_WRAPPER("ERROR: ZBUFF_decompressContinue %s\n", ZSTD_getErrorName(errorCode));
ZWRAP_freeDCtx(zwd); strm->state = NULL;
return Z_MEM_ERROR;
}
}
}
return Z_OK;
}
ZEXTERN int ZEXPORT z_inflate OF((z_streamp strm, int flush))
{
if (!strm->reserved)
return inflate(strm, flush);
if (strm->avail_in > 0) {
size_t errorCode, dstCapacity, srcSize;
ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state;
if (strm->state == NULL) return Z_MEM_ERROR;
LOG_WRAPPER("inflate 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);
if (strm->total_in < ZWRAP_HEADERSIZE)
{
srcSize = MIN(strm->avail_in, ZWRAP_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 < ZWRAP_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_WRAPPER("ZLIB inflateInit errorCode=%d\n", (int)errorCode);
if (errorCode != Z_OK) { ZWRAP_freeDCtx(zwd); strm->state = NULL; return errorCode; }
/* inflate header */
strm->next_in = (unsigned char*)zwd->headerBuf;
strm->avail_in = ZWRAP_HEADERSIZE;
strm->avail_out = 0;
errorCode = inflate(strm, Z_NO_FLUSH);
LOG_WRAPPER("ZLIB inflate errorCode=%d strm->avail_in=%d\n", (int)errorCode, (int)strm->avail_in);
if (errorCode != Z_OK) { ZWRAP_freeDCtx(zwd); strm->state = NULL; return 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 = 0; /* mark as zlib stream */
errorCode = ZWRAP_freeDCtx(zwd);
if (ZSTD_isError(errorCode)) goto error;
if (flush == Z_INFLATE_SYNC) return inflateSync(strm);
return inflate(strm, flush);
}
zwd->zbd = ZBUFF_createDCtx_advanced(zwd->customMem);
if (zwd->zbd == NULL) goto error;
errorCode = ZBUFF_decompressInit(zwd->zbd);
if (ZSTD_isError(errorCode)) goto error;
srcSize = ZWRAP_HEADERSIZE;
dstCapacity = 0;
errorCode = ZBUFF_decompressContinue(zwd->zbd, strm->next_out, &dstCapacity, zwd->headerBuf, &srcSize);
LOG_WRAPPER("ZBUFF_decompressContinue1 errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)srcSize, (int)dstCapacity);
if (ZSTD_isError(errorCode)) {
LOG_WRAPPER("ERROR: ZBUFF_decompressContinue %s\n", ZSTD_getErrorName(errorCode));
goto error;
}
if (strm->avail_in == 0) return Z_OK;
}
srcSize = strm->avail_in;
dstCapacity = strm->avail_out;
errorCode = ZBUFF_decompressContinue(zwd->zbd, strm->next_out, &dstCapacity, strm->next_in, &srcSize);
LOG_WRAPPER("ZBUFF_decompressContinue2 errorCode=%d srcSize=%d dstCapacity=%d\n", (int)errorCode, (int)srcSize, (int)dstCapacity);
if (ZSTD_isError(errorCode)) {
LOG_WRAPPER("ERROR: ZBUFF_decompressContinue %s\n", ZSTD_getErrorName(errorCode));
zwd->errorCount++;
if (zwd->errorCount<=1) return Z_NEED_DICT; else goto error;
}
strm->next_out += dstCapacity;
strm->total_out += dstCapacity;
strm->avail_out -= dstCapacity;
strm->total_in += srcSize;
strm->next_in += srcSize;
strm->avail_in -= srcSize;
if (errorCode == 0) return Z_STREAM_END;
return Z_OK;
error:
ZWRAP_freeDCtx(zwd);
strm->state = NULL;
return Z_MEM_ERROR;
}
return Z_OK;
}
ZEXTERN int ZEXPORT z_inflateEnd OF((z_streamp strm))
{
int ret = Z_OK;
if (!strm->reserved)
return inflateEnd(strm);
LOG_WRAPPER("- inflateEnd total_in=%d total_out=%d\n", (int)(strm->total_in), (int)(strm->total_out));
{ ZWRAP_DCtx* zwd = (ZWRAP_DCtx*) strm->state;
size_t const errorCode = ZWRAP_freeDCtx(zwd);
strm->state = NULL;
if (ZSTD_isError(errorCode)) return Z_MEM_ERROR;
}
return ret;
}
ZEXTERN int ZEXPORT z_inflateSync OF((z_streamp 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_useZSTD)
return deflateCopy(dest, source);
FINISH_WITH_ERR(source, "deflateCopy is not supported!");
}
ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm))
{
if (!g_useZSTD)
return deflateReset(strm);
FINISH_WITH_ERR(strm, "deflateReset 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_useZSTD)
return deflateTune(strm, good_length, max_lazy, nice_length, max_chain);
FINISH_WITH_ERR(strm, "deflateTune is not supported!");
}
#if ZLIB_VERNUM >= 0x1260
ZEXTERN int ZEXPORT z_deflatePending OF((z_streamp strm,
unsigned *pending,
int *bits))
{
if (!g_useZSTD)
return deflatePending(strm, pending, bits);
FINISH_WITH_ERR(strm, "deflatePending is not supported!");
}
#endif
ZEXTERN int ZEXPORT z_deflatePrime OF((z_streamp strm,
int bits,
int value))
{
if (!g_useZSTD)
return deflatePrime(strm, bits, value);
FINISH_WITH_ERR(strm, "deflatePrime is not supported!");
}
ZEXTERN int ZEXPORT z_deflateSetHeader OF((z_streamp strm,
gz_headerp head))
{
if (!g_useZSTD)
return deflateSetHeader(strm, head);
FINISH_WITH_ERR(strm, "deflateSetHeader is not supported!");
}
/* Advanced compression functions */
#if ZLIB_VERNUM >= 0x1280
ZEXTERN int ZEXPORT z_inflateGetDictionary OF((z_streamp strm,
Bytef *dictionary,
uInt *dictLength))
{
if (!strm->reserved)
return inflateGetDictionary(strm, dictionary, dictLength);
FINISH_WITH_ERR(strm, "inflateGetDictionary is not supported!");
}
#endif
ZEXTERN int ZEXPORT z_inflateCopy OF((z_streamp dest,
z_streamp source))
{
if (!g_useZSTD)
return inflateCopy(dest, source);
FINISH_WITH_ERR(source, "inflateCopy is not supported!");
}
ZEXTERN int ZEXPORT z_inflateReset OF((z_streamp strm))
{
if (!strm->reserved)
return inflateReset(strm);
FINISH_WITH_ERR(strm, "inflateReset is not supported!");
}
#if ZLIB_VERNUM >= 0x1240
ZEXTERN int ZEXPORT z_inflateReset2 OF((z_streamp strm,
int windowBits))
{
if (!strm->reserved)
return inflateReset2(strm, windowBits);
FINISH_WITH_ERR(strm, "inflateReset2 is not supported!");
}
#endif
#if ZLIB_VERNUM >= 0x1240
ZEXTERN long ZEXPORT z_inflateMark OF((z_streamp strm))
{
if (!strm->reserved)
return inflateMark(strm);
FINISH_WITH_ERR(strm, "inflateMark is not supported!");
}
#endif
ZEXTERN int ZEXPORT z_inflatePrime OF((z_streamp strm,
int bits,
int value))
{
if (!strm->reserved)
return inflatePrime(strm, bits, value);
FINISH_WITH_ERR(strm, "inflatePrime is not supported!");
}
ZEXTERN int ZEXPORT z_inflateGetHeader OF((z_streamp strm,
gz_headerp head))
{
if (!strm->reserved)
return inflateGetHeader(strm, head);
FINISH_WITH_ERR(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 (!strm->reserved)
return inflateBackInit_(strm, windowBits, window, version, stream_size);
FINISH_WITH_ERR(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 (!strm->reserved)
return inflateBack(strm, in, in_desc, out, out_desc);
FINISH_WITH_ERR(strm, "inflateBack is not supported!");
}
ZEXTERN int ZEXPORT z_inflateBackEnd OF((z_streamp strm))
{
if (!strm->reserved)
return inflateBackEnd(strm);
FINISH_WITH_ERR(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_useZSTD)
return compress(dest, destLen, source, sourceLen);
{ size_t dstCapacity = *destLen;
size_t const errorCode = ZSTD_compress(dest, dstCapacity, source, sourceLen, ZWRAP_DEFAULT_CLEVEL);
LOG_WRAPPER("z_compress sourceLen=%d dstCapacity=%d\n", (int)sourceLen, (int)dstCapacity);
if (ZSTD_isError(errorCode)) return Z_MEM_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_useZSTD)
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_MEM_ERROR;
*destLen = errorCode;
}
return Z_OK;
}
ZEXTERN uLong ZEXPORT z_compressBound OF((uLong sourceLen))
{
if (!g_useZSTD)
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_MEM_ERROR;
*destLen = errorCode;
}
return Z_OK;
}
/* gzip file access functions */
ZEXTERN gzFile ZEXPORT z_gzopen OF((const char *path, const char *mode))
{
if (!g_useZSTD)
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_useZSTD)
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_useZSTD)
return gzbuffer(file, size);
FINISH_WITH_GZ_ERR("gzbuffer is not supported!");
}
ZEXTERN z_off_t ZEXPORT z_gzoffset OF((gzFile file))
{
if (!g_useZSTD)
return gzoffset(file);
FINISH_WITH_GZ_ERR("gzoffset is not supported!");
}
ZEXTERN int ZEXPORT z_gzclose_r OF((gzFile file))
{
if (!g_useZSTD)
return gzclose_r(file);
FINISH_WITH_GZ_ERR("gzclose_r is not supported!");
}
ZEXTERN int ZEXPORT z_gzclose_w OF((gzFile file))
{
if (!g_useZSTD)
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_useZSTD)
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_useZSTD)
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_useZSTD)
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_useZSTD) {
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_useZSTD)
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_useZSTD)
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_useZSTD)
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_useZSTD)
return gzgetc(file);
FINISH_WITH_GZ_ERR("gzgetc is not supported!");
}
ZEXTERN int ZEXPORT z_gzungetc OF((int c, gzFile file))
{
if (!g_useZSTD)
return gzungetc(c, file);
FINISH_WITH_GZ_ERR("gzungetc is not supported!");
}
ZEXTERN int ZEXPORT z_gzflush OF((gzFile file, int flush))
{
if (!g_useZSTD)
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_useZSTD)
return gzseek(file, offset, whence);
FINISH_WITH_GZ_ERR("gzseek is not supported!");
}
ZEXTERN int ZEXPORT z_gzrewind OF((gzFile file))
{
if (!g_useZSTD)
return gzrewind(file);
FINISH_WITH_GZ_ERR("gzrewind is not supported!");
}
ZEXTERN z_off_t ZEXPORT z_gztell OF((gzFile file))
{
if (!g_useZSTD)
return gztell(file);
FINISH_WITH_GZ_ERR("gztell is not supported!");
}
ZEXTERN int ZEXPORT z_gzeof OF((gzFile file))
{
if (!g_useZSTD)
return gzeof(file);
FINISH_WITH_GZ_ERR("gzeof is not supported!");
}
ZEXTERN int ZEXPORT z_gzdirect OF((gzFile file))
{
if (!g_useZSTD)
return gzdirect(file);
FINISH_WITH_GZ_ERR("gzdirect is not supported!");
}
ZEXTERN int ZEXPORT z_gzclose OF((gzFile file))
{
if (!g_useZSTD)
return gzclose(file);
FINISH_WITH_GZ_ERR("gzclose is not supported!");
}
ZEXTERN const char * ZEXPORT z_gzerror OF((gzFile file, int *errnum))
{
if (!g_useZSTD)
return gzerror(file, errnum);
FINISH_WITH_NULL_ERR("gzerror is not supported!");
}
ZEXTERN void ZEXPORT z_gzclearerr OF((gzFile file))
{
if (!g_useZSTD)
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);
}
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