Frame content size supported
This commit is contained in:
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382ab21ea3
commit
d1b26849e5
@ -425,11 +425,11 @@ static void ZSTD_reduceIndex (ZSTD_CCtx* zc,
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FSE_ENCODING_DYNAMIC : read NCount
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*/
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size_t ZSTD_noCompressBlock (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
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size_t ZSTD_noCompressBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
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{
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BYTE* const ostart = (BYTE* const)dst;
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if (srcSize + ZSTD_blockHeaderSize > maxDstSize) return ERROR(dstSize_tooSmall);
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if (srcSize + ZSTD_blockHeaderSize > dstCapacity) return ERROR(dstSize_tooSmall);
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memcpy(ostart + ZSTD_blockHeaderSize, src, srcSize);
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/* Build header */
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@ -442,12 +442,12 @@ size_t ZSTD_noCompressBlock (void* dst, size_t maxDstSize, const void* src, size
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}
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static size_t ZSTD_noCompressLiterals (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
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static size_t ZSTD_noCompressLiterals (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
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{
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BYTE* const ostart = (BYTE* const)dst;
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const U32 flSize = 1 + (srcSize>31) + (srcSize>4095);
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if (srcSize + flSize > maxDstSize) return ERROR(dstSize_tooSmall);
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if (srcSize + flSize > dstCapacity) return ERROR(dstSize_tooSmall);
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switch(flSize)
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{
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@ -470,12 +470,12 @@ static size_t ZSTD_noCompressLiterals (void* dst, size_t maxDstSize, const void*
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return srcSize + flSize;
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}
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static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
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static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
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{
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BYTE* const ostart = (BYTE* const)dst;
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U32 flSize = 1 + (srcSize>31) + (srcSize>4095);
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(void)maxDstSize; /* maxDstSize guaranteed to be >=4, hence large enough */
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(void)dstCapacity; /* dstCapacity guaranteed to be >=4, hence large enough */
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switch(flSize)
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{
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@ -502,7 +502,7 @@ static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t maxDstSize, const
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size_t ZSTD_minGain(size_t srcSize) { return (srcSize >> 6) + 2; }
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static size_t ZSTD_compressLiterals (ZSTD_CCtx* zc,
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void* dst, size_t maxDstSize,
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void* dst, size_t dstCapacity,
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const void* src, size_t srcSize)
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{
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const size_t minGain = ZSTD_minGain(srcSize);
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@ -512,19 +512,19 @@ static size_t ZSTD_compressLiterals (ZSTD_CCtx* zc,
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U32 hType = IS_HUF;
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size_t clitSize;
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if (maxDstSize < lhSize+1) return ERROR(dstSize_tooSmall); /* not enough space for compression */
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if (dstCapacity < lhSize+1) return ERROR(dstSize_tooSmall); /* not enough space for compression */
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if (zc->flagStaticTables && (lhSize==3)) {
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hType = IS_PCH;
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singleStream = 1;
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clitSize = HUF_compress1X_usingCTable(ostart+lhSize, maxDstSize-lhSize, src, srcSize, zc->hufTable);
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clitSize = HUF_compress1X_usingCTable(ostart+lhSize, dstCapacity-lhSize, src, srcSize, zc->hufTable);
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} else {
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clitSize = singleStream ? HUF_compress1X(ostart+lhSize, maxDstSize-lhSize, src, srcSize, 255, 12)
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: HUF_compress2 (ostart+lhSize, maxDstSize-lhSize, src, srcSize, 255, 12);
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clitSize = singleStream ? HUF_compress1X(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 12)
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: HUF_compress2 (ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 12);
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}
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if ((clitSize==0) || (clitSize >= srcSize - minGain)) return ZSTD_noCompressLiterals(dst, maxDstSize, src, srcSize);
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if (clitSize==1) return ZSTD_compressRleLiteralsBlock(dst, maxDstSize, src, srcSize);
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if ((clitSize==0) || (clitSize >= srcSize - minGain)) return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize);
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if (clitSize==1) return ZSTD_compressRleLiteralsBlock(dst, dstCapacity, src, srcSize);
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/* Build header */
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switch(lhSize)
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@ -557,7 +557,7 @@ static size_t ZSTD_compressLiterals (ZSTD_CCtx* zc,
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#define LITERAL_NOENTROPY 63 /* don't even attempt to compress literals below this threshold (cheap heuristic) */
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size_t ZSTD_compressSequences(ZSTD_CCtx* zc,
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void* dst, size_t maxDstSize,
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void* dst, size_t dstCapacity,
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size_t srcSize)
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{
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const seqStore_t* seqStorePtr = &(zc->seqStore);
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@ -577,7 +577,7 @@ size_t ZSTD_compressSequences(ZSTD_CCtx* zc,
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BYTE* const offCodeTable = seqStorePtr->offCodeStart;
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BYTE* const ostart = (BYTE*)dst;
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BYTE* op = ostart;
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BYTE* const oend = ostart + maxDstSize;
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BYTE* const oend = ostart + dstCapacity;
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const size_t nbSeq = llPtr - llTable;
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const size_t minGain = ZSTD_minGain(srcSize);
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const size_t maxCSize = srcSize - minGain;
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@ -590,9 +590,9 @@ size_t ZSTD_compressSequences(ZSTD_CCtx* zc,
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const size_t minLitSize = zc->flagStaticTables ? 6 : LITERAL_NOENTROPY;
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if (litSize <= minLitSize)
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cSize = ZSTD_noCompressLiterals(op, maxDstSize, op_lit_start, litSize);
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cSize = ZSTD_noCompressLiterals(op, dstCapacity, op_lit_start, litSize);
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else
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cSize = ZSTD_compressLiterals(zc, op, maxDstSize, op_lit_start, litSize);
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cSize = ZSTD_compressLiterals(zc, op, dstCapacity, op_lit_start, litSize);
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if (ZSTD_isError(cSize)) return cSize;
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op += cSize;
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}
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@ -1940,17 +1940,17 @@ static ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, int
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}
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static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
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static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, void* dst, size_t dstCapacity, const void* src, size_t srcSize)
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{
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ZSTD_blockCompressor blockCompressor = ZSTD_selectBlockCompressor(zc->params.strategy, zc->lowLimit < zc->dictLimit);
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if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) return 0; /* don't even attempt compression below a certain srcSize */
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blockCompressor(zc, src, srcSize);
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return ZSTD_compressSequences(zc, dst, maxDstSize, srcSize);
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return ZSTD_compressSequences(zc, dst, dstCapacity, srcSize);
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}
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static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
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void* dst, size_t maxDstSize,
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void* dst, size_t dstCapacity,
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const void* src, size_t srcSize)
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{
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size_t blockSize = zc->blockSize;
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@ -1969,7 +1969,7 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
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while (remaining) {
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size_t cSize;
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if (maxDstSize < ZSTD_blockHeaderSize + MIN_CBLOCK_SIZE) return ERROR(dstSize_tooSmall); /* not enough space to store compressed block */
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if (dstCapacity < ZSTD_blockHeaderSize + MIN_CBLOCK_SIZE) return ERROR(dstSize_tooSmall); /* not enough space to store compressed block */
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if (remaining < blockSize) blockSize = remaining;
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if ((U32)(ip+blockSize - zc->base) > zc->loadedDictEnd + maxDist) { /* enforce maxDist */
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@ -1978,11 +1978,11 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
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if (zc->dictLimit < zc->lowLimit) zc->dictLimit = zc->lowLimit;
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}
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cSize = ZSTD_compressBlock_internal(zc, op+ZSTD_blockHeaderSize, maxDstSize-ZSTD_blockHeaderSize, ip, blockSize);
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cSize = ZSTD_compressBlock_internal(zc, op+ZSTD_blockHeaderSize, dstCapacity-ZSTD_blockHeaderSize, ip, blockSize);
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if (ZSTD_isError(cSize)) return cSize;
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if (cSize == 0) { /* block is not compressible */
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cSize = ZSTD_noCompressBlock(op, maxDstSize, ip, blockSize);
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cSize = ZSTD_noCompressBlock(op, dstCapacity, ip, blockSize);
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if (ZSTD_isError(cSize)) return cSize;
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} else {
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op[0] = (BYTE)(cSize>>16);
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@ -1993,7 +1993,7 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
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}
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remaining -= blockSize;
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maxDstSize -= cSize;
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dstCapacity -= cSize;
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ip += blockSize;
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op += cSize;
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}
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@ -2077,12 +2077,12 @@ size_t ZSTD_compressContinue (ZSTD_CCtx* zc,
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}
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size_t ZSTD_compressBlock(ZSTD_CCtx* zc, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
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size_t ZSTD_compressBlock(ZSTD_CCtx* zc, void* dst, size_t dstCapacity, const void* src, size_t srcSize)
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{
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if (srcSize > BLOCKSIZE) return ERROR(srcSize_wrong);
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zc->params.searchLength = MINMATCH; /* force ZSTD_btopt to MINMATCH in block mode */
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ZSTD_LOG_BLOCK("%p: ZSTD_compressBlock searchLength=%d\n", zc->base, zc->params.searchLength);
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return ZSTD_compressContinue_internal(zc, dst, maxDstSize, src, srcSize, 0);
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return ZSTD_compressContinue_internal(zc, dst, dstCapacity, src, srcSize, 0);
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}
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@ -2174,20 +2174,20 @@ static size_t ZSTD_loadDictEntropyStats(ZSTD_CCtx* zc, const void* dict, size_t
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return hufHeaderSize + offcodeHeaderSize + matchlengthHeaderSize + litlengthHeaderSize;
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}
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/** ZSTD_compress_insertDictionary() :
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* @return : 0, or an error code */
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static size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* zc, const void* dict, size_t dictSize)
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{
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if (dict && (dictSize>4)) {
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U32 magic = MEM_readLE32(dict);
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size_t eSize;
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if (magic != ZSTD_DICT_MAGIC)
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return ZSTD_loadDictionaryContent(zc, dict, dictSize);
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if ((dict==NULL) || (dictSize<=4)) return 0;
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eSize = ZSTD_loadDictEntropyStats(zc, (const char*)dict+4, dictSize-4) + 4;
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if (ZSTD_isError(eSize)) return eSize;
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return ZSTD_loadDictionaryContent(zc, (const char*)dict+eSize, dictSize-eSize);
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/* default : dict is pure content */
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if (MEM_readLE32(dict) != ZSTD_DICT_MAGIC) return ZSTD_loadDictionaryContent(zc, dict, dictSize);
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/* known magic number : dict is parsed for entropy stats and content */
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{ size_t const eSize = ZSTD_loadDictEntropyStats(zc, (const char*)dict+4 /* skip magic */, dictSize-4) + 4;
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if (ZSTD_isError(eSize)) return eSize;
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return ZSTD_loadDictionaryContent(zc, (const char*)dict+eSize, dictSize-eSize);
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}
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return 0;
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}
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@ -2197,27 +2197,42 @@ size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* zc,
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const void* dict, size_t dictSize,
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ZSTD_parameters params)
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{
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size_t errorCode;
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ZSTD_validateParams(¶ms);
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errorCode = ZSTD_resetCCtx_advanced(zc, params);
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if (ZSTD_isError(errorCode)) return errorCode;
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{ size_t const errorCode = ZSTD_resetCCtx_advanced(zc, params);
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if (ZSTD_isError(errorCode)) return errorCode; }
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/* Write Frame Header into ctx headerBuffer */
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MEM_writeLE32(zc->headerBuffer, ZSTD_MAGICNUMBER);
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{
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U32 const fcsSize[4] = { 0, 1, 2, 8 };
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U32 const fcsId = (params.srcSize>0) + (params.srcSize>=256) + (params.srcSize>=65536+256); /* 0-3 */
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BYTE fdescriptor = (BYTE)(params.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN); /* windowLog : 4 KB - 128 MB */
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fdescriptor |= (BYTE)((params.searchLength==3)<<4); /* mml : 3-4 */
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fdescriptor |= (BYTE)(fcsId << 6);
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((BYTE*)zc->headerBuffer)[4] = fdescriptor;
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switch(fcsId)
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{
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default: /* impossible */
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case 0 : break;
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case 1 : ((BYTE*)zc->headerBuffer)[5] = (BYTE)(params.srcSize); break;
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case 2 : MEM_writeLE16(((BYTE*)zc->headerBuffer)+5, (U16)(params.srcSize-256)); break;
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case 3 : MEM_writeLE64(((BYTE*)zc->headerBuffer)+5, (U64)(params.srcSize)); break;
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}
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zc->hbSize = ZSTD_frameHeaderSize_min + fcsSize[fcsId];
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}
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/* Write Frame Header */
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MEM_writeLE32(zc->headerBuffer, ZSTD_MAGICNUMBER); /* Write Header */
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((BYTE*)zc->headerBuffer)[4] = (BYTE)(params.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN + ((params.searchLength==3)<<4));
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zc->hbSize = ZSTD_frameHeaderSize_min;
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zc->stage = 0;
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return ZSTD_compress_insertDictionary(zc, dict, dictSize);
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}
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size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx* zc, const void* dict, size_t dictSize, int compressionLevel)
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{
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ZSTD_parameters params = ZSTD_getParams(compressionLevel, dictSize);
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params.srcSize = 0;
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ZSTD_LOG_BLOCK("%p: ZSTD_compressBegin_usingDict compressionLevel=%d\n", zc->base, compressionLevel);
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return ZSTD_compressBegin_advanced(zc, dict, dictSize, ZSTD_getParams(compressionLevel, MAX(128 KB, dictSize)));
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return ZSTD_compressBegin_advanced(zc, dict, dictSize, params);
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}
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size_t ZSTD_compressBegin(ZSTD_CCtx* zc, int compressionLevel)
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@ -2230,7 +2245,7 @@ size_t ZSTD_compressBegin(ZSTD_CCtx* zc, int compressionLevel)
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/*! ZSTD_compressEnd() :
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* Write frame epilogue.
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* @return : nb of bytes written into dst (or an error code) */
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size_t ZSTD_compressEnd(ZSTD_CCtx* zc, void* dst, size_t maxDstSize)
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size_t ZSTD_compressEnd(ZSTD_CCtx* zc, void* dst, size_t dstCapacity)
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{
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BYTE* op = (BYTE*)dst;
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size_t hbSize = 0;
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@ -2238,15 +2253,15 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* zc, void* dst, size_t maxDstSize)
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/* empty frame */
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if (zc->stage==0) {
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hbSize = zc->hbSize;
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if (maxDstSize <= hbSize) return ERROR(dstSize_tooSmall);
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if (dstCapacity <= hbSize) return ERROR(dstSize_tooSmall);
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zc->stage = 1;
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memcpy(dst, zc->headerBuffer, hbSize);
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maxDstSize -= hbSize;
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dstCapacity -= hbSize;
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op += hbSize;
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}
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/* frame epilogue */
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if (maxDstSize < 3) return ERROR(dstSize_tooSmall);
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if (dstCapacity < 3) return ERROR(dstSize_tooSmall);
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op[0] = (BYTE)(bt_end << 6);
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op[1] = 0;
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op[2] = 0;
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@ -2256,16 +2271,16 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* zc, void* dst, size_t maxDstSize)
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size_t ZSTD_compress_usingPreparedCCtx(ZSTD_CCtx* cctx, const ZSTD_CCtx* preparedCCtx,
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void* dst, size_t maxDstSize,
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void* dst, size_t dstCapacity,
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const void* src, size_t srcSize)
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{
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size_t outSize;
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size_t errorCode = ZSTD_copyCCtx(cctx, preparedCCtx);
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if (ZSTD_isError(errorCode)) return errorCode;
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errorCode = ZSTD_compressContinue(cctx, dst, maxDstSize, src, srcSize);
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errorCode = ZSTD_compressContinue(cctx, dst, dstCapacity, src, srcSize);
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if (ZSTD_isError(errorCode)) return errorCode;
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outSize = errorCode;
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errorCode = ZSTD_compressEnd(cctx, (char*)dst+outSize, maxDstSize-outSize);
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errorCode = ZSTD_compressEnd(cctx, (char*)dst+outSize, dstCapacity-outSize);
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if (ZSTD_isError(errorCode)) return errorCode;
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outSize += errorCode;
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return outSize;
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@ -2273,51 +2288,50 @@ size_t ZSTD_compress_usingPreparedCCtx(ZSTD_CCtx* cctx, const ZSTD_CCtx* prepare
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size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
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void* dst, size_t maxDstSize,
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void* dst, size_t dstCapacity,
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const void* src, size_t srcSize,
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const void* dict,size_t dictSize,
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ZSTD_parameters params)
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{
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BYTE* const ostart = (BYTE*)dst;
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BYTE* op = ostart;
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size_t oSize;
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/* Init */
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oSize = ZSTD_compressBegin_advanced(ctx, dict, dictSize, params);
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if(ZSTD_isError(oSize)) return oSize;
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{ size_t const errorCode = ZSTD_compressBegin_advanced(ctx, dict, dictSize, params);
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if(ZSTD_isError(errorCode)) return errorCode; }
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/* body (compression) */
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oSize = ZSTD_compressContinue (ctx, op, maxDstSize, src, srcSize);
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{ size_t const oSize = ZSTD_compressContinue (ctx, op, dstCapacity, src, srcSize);
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if(ZSTD_isError(oSize)) return oSize;
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op += oSize;
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maxDstSize -= oSize;
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dstCapacity -= oSize; }
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/* Close frame */
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oSize = ZSTD_compressEnd(ctx, op, maxDstSize);
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{ size_t const oSize = ZSTD_compressEnd(ctx, op, dstCapacity);
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if(ZSTD_isError(oSize)) return oSize;
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op += oSize;
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op += oSize; }
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return (op - ostart);
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}
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size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, const void* dict, size_t dictSize, int compressionLevel)
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size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, const void* dict, size_t dictSize, int compressionLevel)
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{
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ZSTD_LOG_BLOCK("%p: ZSTD_compress_usingDict srcSize=%d dictSize=%d compressionLevel=%d\n", ctx->base, (int)srcSize, (int)dictSize, compressionLevel);
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return ZSTD_compress_advanced(ctx, dst, maxDstSize, src, srcSize, dict, dictSize, ZSTD_getParams(compressionLevel, srcSize));
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return ZSTD_compress_advanced(ctx, dst, dstCapacity, src, srcSize, dict, dictSize, ZSTD_getParams(compressionLevel, srcSize));
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||||
}
|
||||
|
||||
size_t ZSTD_compressCCtx (ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel)
|
||||
size_t ZSTD_compressCCtx (ZSTD_CCtx* ctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel)
|
||||
{
|
||||
ZSTD_LOG_BLOCK("%p: ZSTD_compressCCtx srcSize=%d compressionLevel=%d\n", ctx->base, (int)srcSize, compressionLevel);
|
||||
return ZSTD_compress_advanced(ctx, dst, maxDstSize, src, srcSize, NULL, 0, ZSTD_getParams(compressionLevel, srcSize));
|
||||
return ZSTD_compress_advanced(ctx, dst, dstCapacity, src, srcSize, NULL, 0, ZSTD_getParams(compressionLevel, srcSize));
|
||||
}
|
||||
|
||||
size_t ZSTD_compress(void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel)
|
||||
size_t ZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel)
|
||||
{
|
||||
size_t result;
|
||||
ZSTD_CCtx ctxBody;
|
||||
memset(&ctxBody, 0, sizeof(ctxBody));
|
||||
result = ZSTD_compressCCtx(&ctxBody, dst, maxDstSize, src, srcSize, compressionLevel);
|
||||
result = ZSTD_compressCCtx(&ctxBody, dst, dstCapacity, src, srcSize, compressionLevel);
|
||||
free(ctxBody.workSpace); /* can't free ctxBody, since it's on stack; just free heap content */
|
||||
return result;
|
||||
}
|
||||
|
@ -307,15 +307,13 @@ static size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize)
|
||||
* or an error code, which can be tested using ZSTD_isError() */
|
||||
size_t ZSTD_getFrameParams(ZSTD_frameParams* fparamsPtr, const void* src, size_t srcSize)
|
||||
{
|
||||
U32 magicNumber, fcsId;
|
||||
const BYTE* ip = (const BYTE*)src;
|
||||
BYTE frameDesc;
|
||||
|
||||
if (srcSize < ZSTD_frameHeaderSize_min) return ZSTD_frameHeaderSize_min;
|
||||
magicNumber = MEM_readLE32(src);
|
||||
if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
|
||||
if (MEM_readLE32(src) != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
|
||||
|
||||
{ size_t fhsize = ZSTD_frameHeaderSize(src, srcSize);
|
||||
{ size_t const fhsize = ZSTD_frameHeaderSize(src, srcSize);
|
||||
if (srcSize < fhsize) return fhsize; }
|
||||
|
||||
memset(fparamsPtr, 0, sizeof(*fparamsPtr));
|
||||
@ -323,13 +321,12 @@ size_t ZSTD_getFrameParams(ZSTD_frameParams* fparamsPtr, const void* src, size_t
|
||||
fparamsPtr->windowLog = (frameDesc & 0xF) + ZSTD_WINDOWLOG_ABSOLUTEMIN;
|
||||
fparamsPtr->mml = (frameDesc & 0x10) ? MINMATCH-1 : MINMATCH;
|
||||
if ((frameDesc & 0x20) != 0) return ERROR(frameParameter_unsupported); /* reserved 1 bit */
|
||||
fcsId = frameDesc >> 6;
|
||||
switch(fcsId)
|
||||
switch(frameDesc >> 6) /* fcsId */
|
||||
{
|
||||
default: /* impossible */
|
||||
case 0 : fparamsPtr->frameContentSize = 0; break;
|
||||
case 1 : fparamsPtr->frameContentSize = ip[5]; break;
|
||||
case 2 : fparamsPtr->frameContentSize = MEM_readLE16(ip+5); break;
|
||||
case 2 : fparamsPtr->frameContentSize = MEM_readLE16(ip+5)+256; break;
|
||||
case 3 : fparamsPtr->frameContentSize = MEM_readLE64(ip+5); break;
|
||||
}
|
||||
return 0;
|
||||
|
Loading…
Reference in New Issue
Block a user