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-rw-r--r--lib/decompress/zstd_decompress.c334
1 files changed, 115 insertions, 219 deletions
diff --git a/lib/decompress/zstd_decompress.c b/lib/decompress/zstd_decompress.c
index 2aaa4a3df3c50..910f9ab783c31 100644
--- a/lib/decompress/zstd_decompress.c
+++ b/lib/decompress/zstd_decompress.c
@@ -177,30 +177,6 @@ void ZSTD_copyDCtx(ZSTD_DCtx* dstDCtx, const ZSTD_DCtx* srcDCtx)
memcpy(dstDCtx, srcDCtx, sizeof(ZSTD_DCtx) - workSpaceSize); /* no need to copy workspace */
}
-#if 0
-/* deprecated */
-static void ZSTD_refDCtx(ZSTD_DCtx* dstDCtx, const ZSTD_DCtx* srcDCtx)
-{
- ZSTD_decompressBegin(dstDCtx); /* init */
- if (srcDCtx) { /* support refDCtx on NULL */
- dstDCtx->dictEnd = srcDCtx->dictEnd;
- dstDCtx->vBase = srcDCtx->vBase;
- dstDCtx->base = srcDCtx->base;
- dstDCtx->previousDstEnd = srcDCtx->previousDstEnd;
- dstDCtx->dictID = srcDCtx->dictID;
- dstDCtx->litEntropy = srcDCtx->litEntropy;
- dstDCtx->fseEntropy = srcDCtx->fseEntropy;
- dstDCtx->LLTptr = srcDCtx->entropy.LLTable;
- dstDCtx->MLTptr = srcDCtx->entropy.MLTable;
- dstDCtx->OFTptr = srcDCtx->entropy.OFTable;
- dstDCtx->HUFptr = srcDCtx->entropy.hufTable;
- dstDCtx->entropy.rep[0] = srcDCtx->entropy.rep[0];
- dstDCtx->entropy.rep[1] = srcDCtx->entropy.rep[1];
- dstDCtx->entropy.rep[2] = srcDCtx->entropy.rep[2];
- }
-}
-#endif
-
static void ZSTD_refDDict(ZSTD_DCtx* dstDCtx, const ZSTD_DDict* ddict);
@@ -431,7 +407,8 @@ typedef struct
/*! ZSTD_getcBlockSize() :
* Provides the size of compressed block from block header `src` */
-size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr)
+size_t ZSTD_getcBlockSize(const void* src, size_t srcSize,
+ blockProperties_t* bpPtr)
{
if (srcSize < ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
{ U32 const cBlockHeader = MEM_readLE24(src);
@@ -446,7 +423,8 @@ size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bp
}
-static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
+static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity,
+ const void* src, size_t srcSize)
{
if (srcSize > dstCapacity) return ERROR(dstSize_tooSmall);
memcpy(dst, src, srcSize);
@@ -454,7 +432,9 @@ static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity, const void* src,
}
-static size_t ZSTD_setRleBlock(void* dst, size_t dstCapacity, const void* src, size_t srcSize, size_t regenSize)
+static size_t ZSTD_setRleBlock(void* dst, size_t dstCapacity,
+ const void* src, size_t srcSize,
+ size_t regenSize)
{
if (srcSize != 1) return ERROR(srcSize_wrong);
if (regenSize > dstCapacity) return ERROR(dstSize_tooSmall);
@@ -595,176 +575,70 @@ typedef union {
U32 alignedBy4;
} FSE_decode_t4;
+/* Default FSE distribution table for Literal Lengths */
static const FSE_decode_t4 LL_defaultDTable[(1<<LL_DEFAULTNORMLOG)+1] = {
{ { LL_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */
- { { 0, 0, 4 } }, /* 0 : base, symbol, bits */
- { { 16, 0, 4 } },
- { { 32, 1, 5 } },
- { { 0, 3, 5 } },
- { { 0, 4, 5 } },
- { { 0, 6, 5 } },
- { { 0, 7, 5 } },
- { { 0, 9, 5 } },
- { { 0, 10, 5 } },
- { { 0, 12, 5 } },
- { { 0, 14, 6 } },
- { { 0, 16, 5 } },
- { { 0, 18, 5 } },
- { { 0, 19, 5 } },
- { { 0, 21, 5 } },
- { { 0, 22, 5 } },
- { { 0, 24, 5 } },
- { { 32, 25, 5 } },
- { { 0, 26, 5 } },
- { { 0, 27, 6 } },
- { { 0, 29, 6 } },
- { { 0, 31, 6 } },
- { { 32, 0, 4 } },
- { { 0, 1, 4 } },
- { { 0, 2, 5 } },
- { { 32, 4, 5 } },
- { { 0, 5, 5 } },
- { { 32, 7, 5 } },
- { { 0, 8, 5 } },
- { { 32, 10, 5 } },
- { { 0, 11, 5 } },
- { { 0, 13, 6 } },
- { { 32, 16, 5 } },
- { { 0, 17, 5 } },
- { { 32, 19, 5 } },
- { { 0, 20, 5 } },
- { { 32, 22, 5 } },
- { { 0, 23, 5 } },
- { { 0, 25, 4 } },
- { { 16, 25, 4 } },
- { { 32, 26, 5 } },
- { { 0, 28, 6 } },
- { { 0, 30, 6 } },
- { { 48, 0, 4 } },
- { { 16, 1, 4 } },
- { { 32, 2, 5 } },
- { { 32, 3, 5 } },
- { { 32, 5, 5 } },
- { { 32, 6, 5 } },
- { { 32, 8, 5 } },
- { { 32, 9, 5 } },
- { { 32, 11, 5 } },
- { { 32, 12, 5 } },
- { { 0, 15, 6 } },
- { { 32, 17, 5 } },
- { { 32, 18, 5 } },
- { { 32, 20, 5 } },
- { { 32, 21, 5 } },
- { { 32, 23, 5 } },
- { { 32, 24, 5 } },
- { { 0, 35, 6 } },
- { { 0, 34, 6 } },
- { { 0, 33, 6 } },
- { { 0, 32, 6 } },
+ /* base, symbol, bits */
+ { { 0, 0, 4 } }, { { 16, 0, 4 } }, { { 32, 1, 5 } }, { { 0, 3, 5 } },
+ { { 0, 4, 5 } }, { { 0, 6, 5 } }, { { 0, 7, 5 } }, { { 0, 9, 5 } },
+ { { 0, 10, 5 } }, { { 0, 12, 5 } }, { { 0, 14, 6 } }, { { 0, 16, 5 } },
+ { { 0, 18, 5 } }, { { 0, 19, 5 } }, { { 0, 21, 5 } }, { { 0, 22, 5 } },
+ { { 0, 24, 5 } }, { { 32, 25, 5 } }, { { 0, 26, 5 } }, { { 0, 27, 6 } },
+ { { 0, 29, 6 } }, { { 0, 31, 6 } }, { { 32, 0, 4 } }, { { 0, 1, 4 } },
+ { { 0, 2, 5 } }, { { 32, 4, 5 } }, { { 0, 5, 5 } }, { { 32, 7, 5 } },
+ { { 0, 8, 5 } }, { { 32, 10, 5 } }, { { 0, 11, 5 } }, { { 0, 13, 6 } },
+ { { 32, 16, 5 } }, { { 0, 17, 5 } }, { { 32, 19, 5 } }, { { 0, 20, 5 } },
+ { { 32, 22, 5 } }, { { 0, 23, 5 } }, { { 0, 25, 4 } }, { { 16, 25, 4 } },
+ { { 32, 26, 5 } }, { { 0, 28, 6 } }, { { 0, 30, 6 } }, { { 48, 0, 4 } },
+ { { 16, 1, 4 } }, { { 32, 2, 5 } }, { { 32, 3, 5 } }, { { 32, 5, 5 } },
+ { { 32, 6, 5 } }, { { 32, 8, 5 } }, { { 32, 9, 5 } }, { { 32, 11, 5 } },
+ { { 32, 12, 5 } }, { { 0, 15, 6 } }, { { 32, 17, 5 } }, { { 32, 18, 5 } },
+ { { 32, 20, 5 } }, { { 32, 21, 5 } }, { { 32, 23, 5 } }, { { 32, 24, 5 } },
+ { { 0, 35, 6 } }, { { 0, 34, 6 } }, { { 0, 33, 6 } }, { { 0, 32, 6 } },
}; /* LL_defaultDTable */
+/* Default FSE distribution table for Match Lengths */
static const FSE_decode_t4 ML_defaultDTable[(1<<ML_DEFAULTNORMLOG)+1] = {
{ { ML_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */
- { { 0, 0, 6 } }, /* 0 : base, symbol, bits */
- { { 0, 1, 4 } },
- { { 32, 2, 5 } },
- { { 0, 3, 5 } },
- { { 0, 5, 5 } },
- { { 0, 6, 5 } },
- { { 0, 8, 5 } },
- { { 0, 10, 6 } },
- { { 0, 13, 6 } },
- { { 0, 16, 6 } },
- { { 0, 19, 6 } },
- { { 0, 22, 6 } },
- { { 0, 25, 6 } },
- { { 0, 28, 6 } },
- { { 0, 31, 6 } },
- { { 0, 33, 6 } },
- { { 0, 35, 6 } },
- { { 0, 37, 6 } },
- { { 0, 39, 6 } },
- { { 0, 41, 6 } },
- { { 0, 43, 6 } },
- { { 0, 45, 6 } },
- { { 16, 1, 4 } },
- { { 0, 2, 4 } },
- { { 32, 3, 5 } },
- { { 0, 4, 5 } },
- { { 32, 6, 5 } },
- { { 0, 7, 5 } },
- { { 0, 9, 6 } },
- { { 0, 12, 6 } },
- { { 0, 15, 6 } },
- { { 0, 18, 6 } },
- { { 0, 21, 6 } },
- { { 0, 24, 6 } },
- { { 0, 27, 6 } },
- { { 0, 30, 6 } },
- { { 0, 32, 6 } },
- { { 0, 34, 6 } },
- { { 0, 36, 6 } },
- { { 0, 38, 6 } },
- { { 0, 40, 6 } },
- { { 0, 42, 6 } },
- { { 0, 44, 6 } },
- { { 32, 1, 4 } },
- { { 48, 1, 4 } },
- { { 16, 2, 4 } },
- { { 32, 4, 5 } },
- { { 32, 5, 5 } },
- { { 32, 7, 5 } },
- { { 32, 8, 5 } },
- { { 0, 11, 6 } },
- { { 0, 14, 6 } },
- { { 0, 17, 6 } },
- { { 0, 20, 6 } },
- { { 0, 23, 6 } },
- { { 0, 26, 6 } },
- { { 0, 29, 6 } },
- { { 0, 52, 6 } },
- { { 0, 51, 6 } },
- { { 0, 50, 6 } },
- { { 0, 49, 6 } },
- { { 0, 48, 6 } },
- { { 0, 47, 6 } },
- { { 0, 46, 6 } },
+ /* base, symbol, bits */
+ { { 0, 0, 6 } }, { { 0, 1, 4 } }, { { 32, 2, 5 } }, { { 0, 3, 5 } },
+ { { 0, 5, 5 } }, { { 0, 6, 5 } }, { { 0, 8, 5 } }, { { 0, 10, 6 } },
+ { { 0, 13, 6 } }, { { 0, 16, 6 } }, { { 0, 19, 6 } }, { { 0, 22, 6 } },
+ { { 0, 25, 6 } }, { { 0, 28, 6 } }, { { 0, 31, 6 } }, { { 0, 33, 6 } },
+ { { 0, 35, 6 } }, { { 0, 37, 6 } }, { { 0, 39, 6 } }, { { 0, 41, 6 } },
+ { { 0, 43, 6 } }, { { 0, 45, 6 } }, { { 16, 1, 4 } }, { { 0, 2, 4 } },
+ { { 32, 3, 5 } }, { { 0, 4, 5 } }, { { 32, 6, 5 } }, { { 0, 7, 5 } },
+ { { 0, 9, 6 } }, { { 0, 12, 6 } }, { { 0, 15, 6 } }, { { 0, 18, 6 } },
+ { { 0, 21, 6 } }, { { 0, 24, 6 } }, { { 0, 27, 6 } }, { { 0, 30, 6 } },
+ { { 0, 32, 6 } }, { { 0, 34, 6 } }, { { 0, 36, 6 } }, { { 0, 38, 6 } },
+ { { 0, 40, 6 } }, { { 0, 42, 6 } }, { { 0, 44, 6 } }, { { 32, 1, 4 } },
+ { { 48, 1, 4 } }, { { 16, 2, 4 } }, { { 32, 4, 5 } }, { { 32, 5, 5 } },
+ { { 32, 7, 5 } }, { { 32, 8, 5 } }, { { 0, 11, 6 } }, { { 0, 14, 6 } },
+ { { 0, 17, 6 } }, { { 0, 20, 6 } }, { { 0, 23, 6 } }, { { 0, 26, 6 } },
+ { { 0, 29, 6 } }, { { 0, 52, 6 } }, { { 0, 51, 6 } }, { { 0, 50, 6 } },
+ { { 0, 49, 6 } }, { { 0, 48, 6 } }, { { 0, 47, 6 } }, { { 0, 46, 6 } },
}; /* ML_defaultDTable */
+/* Default FSE distribution table for Offset Codes */
static const FSE_decode_t4 OF_defaultDTable[(1<<OF_DEFAULTNORMLOG)+1] = {
{ { OF_DEFAULTNORMLOG, 1, 1 } }, /* header : tableLog, fastMode, fastMode */
- { { 0, 0, 5 } }, /* 0 : base, symbol, bits */
- { { 0, 6, 4 } },
- { { 0, 9, 5 } },
- { { 0, 15, 5 } },
- { { 0, 21, 5 } },
- { { 0, 3, 5 } },
- { { 0, 7, 4 } },
- { { 0, 12, 5 } },
- { { 0, 18, 5 } },
- { { 0, 23, 5 } },
- { { 0, 5, 5 } },
- { { 0, 8, 4 } },
- { { 0, 14, 5 } },
- { { 0, 20, 5 } },
- { { 0, 2, 5 } },
- { { 16, 7, 4 } },
- { { 0, 11, 5 } },
- { { 0, 17, 5 } },
- { { 0, 22, 5 } },
- { { 0, 4, 5 } },
- { { 16, 8, 4 } },
- { { 0, 13, 5 } },
- { { 0, 19, 5 } },
- { { 0, 1, 5 } },
- { { 16, 6, 4 } },
- { { 0, 10, 5 } },
- { { 0, 16, 5 } },
- { { 0, 28, 5 } },
- { { 0, 27, 5 } },
- { { 0, 26, 5 } },
- { { 0, 25, 5 } },
- { { 0, 24, 5 } },
+ /* base, symbol, bits */
+ { { 0, 0, 5 } }, { { 0, 6, 4 } },
+ { { 0, 9, 5 } }, { { 0, 15, 5 } },
+ { { 0, 21, 5 } }, { { 0, 3, 5 } },
+ { { 0, 7, 4 } }, { { 0, 12, 5 } },
+ { { 0, 18, 5 } }, { { 0, 23, 5 } },
+ { { 0, 5, 5 } }, { { 0, 8, 4 } },
+ { { 0, 14, 5 } }, { { 0, 20, 5 } },
+ { { 0, 2, 5 } }, { { 16, 7, 4 } },
+ { { 0, 11, 5 } }, { { 0, 17, 5 } },
+ { { 0, 22, 5 } }, { { 0, 4, 5 } },
+ { { 16, 8, 4 } }, { { 0, 13, 5 } },
+ { { 0, 19, 5 } }, { { 0, 1, 5 } },
+ { { 16, 6, 4 } }, { { 0, 10, 5 } },
+ { { 0, 16, 5 } }, { { 0, 28, 5 } },
+ { { 0, 27, 5 } }, { { 0, 26, 5 } },
+ { { 0, 25, 5 } }, { { 0, 24, 5 } },
}; /* OF_defaultDTable */
/*! ZSTD_buildSeqTable() :
@@ -927,8 +801,6 @@ size_t ZSTD_execSequenceLast7(BYTE* op,
}
-
-
static seq_t ZSTD_decodeSequence(seqState_t* seqState)
{
seq_t seq;
@@ -943,21 +815,26 @@ static seq_t ZSTD_decodeSequence(seqState_t* seqState)
U32 const totalBits = llBits+mlBits+ofBits;
static const U32 LL_base[MaxLL+1] = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
- 16, 18, 20, 22, 24, 28, 32, 40, 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
+ 0, 1, 2, 3, 4, 5, 6, 7,
+ 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 18, 20, 22, 24, 28, 32, 40,
+ 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
0x2000, 0x4000, 0x8000, 0x10000 };
static const U32 ML_base[MaxML+1] = {
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
- 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
- 35, 37, 39, 41, 43, 47, 51, 59, 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803,
+ 3, 4, 5, 6, 7, 8, 9, 10,
+ 11, 12, 13, 14, 15, 16, 17, 18,
+ 19, 20, 21, 22, 23, 24, 25, 26,
+ 27, 28, 29, 30, 31, 32, 33, 34,
+ 35, 37, 39, 41, 43, 47, 51, 59,
+ 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803,
0x1003, 0x2003, 0x4003, 0x8003, 0x10003 };
static const U32 OF_base[MaxOff+1] = {
- 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D,
- 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD,
- 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD,
- 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD };
+ 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D,
+ 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD,
+ 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD,
+ 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD };
/* sequence */
{ size_t offset;
@@ -1031,7 +908,7 @@ size_t ZSTD_execSequence(BYTE* op,
/* copy Match */
if (sequence.offset > (size_t)(oLitEnd - base)) {
- /* offset beyond prefix */
+ /* offset beyond prefix -> go into extDict */
if (sequence.offset > (size_t)(oLitEnd - vBase)) return ERROR(corruption_detected);
match = dictEnd + (match - base);
if (match + sequence.matchLength <= dictEnd) {
@@ -1156,21 +1033,26 @@ FORCE_INLINE seq_t ZSTD_decodeSequenceLong_generic(seqState_t* seqState, int con
U32 const totalBits = llBits+mlBits+ofBits;
static const U32 LL_base[MaxLL+1] = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
- 16, 18, 20, 22, 24, 28, 32, 40, 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
+ 0, 1, 2, 3, 4, 5, 6, 7,
+ 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 18, 20, 22, 24, 28, 32, 40,
+ 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
0x2000, 0x4000, 0x8000, 0x10000 };
static const U32 ML_base[MaxML+1] = {
- 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
- 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
- 35, 37, 39, 41, 43, 47, 51, 59, 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803,
+ 3, 4, 5, 6, 7, 8, 9, 10,
+ 11, 12, 13, 14, 15, 16, 17, 18,
+ 19, 20, 21, 22, 23, 24, 25, 26,
+ 27, 28, 29, 30, 31, 32, 33, 34,
+ 35, 37, 39, 41, 43, 47, 51, 59,
+ 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803,
0x1003, 0x2003, 0x4003, 0x8003, 0x10003 };
static const U32 OF_base[MaxOff+1] = {
- 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D,
- 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD,
- 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD,
- 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD };
+ 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D,
+ 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD,
+ 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD,
+ 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD };
/* sequence */
{ size_t offset;
@@ -1476,7 +1358,7 @@ size_t ZSTD_findFrameCompressedSize(const void *src, size_t srcSize)
if (ZSTD_isLegacy(src, srcSize)) return ZSTD_findFrameCompressedSizeLegacy(src, srcSize);
#endif
if (srcSize >= ZSTD_skippableHeaderSize &&
- (MEM_readLE32(src) & 0xFFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) {
+ (MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) {
return ZSTD_skippableHeaderSize + MEM_readLE32((const BYTE*)src + 4);
} else {
const BYTE* ip = (const BYTE*)src;
@@ -2115,15 +1997,18 @@ unsigned ZSTD_getDictID_fromDDict(const ZSTD_DDict* ddict)
}
/*! ZSTD_getDictID_fromFrame() :
- * Provides the dictID required to decompressed the frame stored within `src`.
+ * Provides the dictID required to decompresse frame stored within `src`.
* If @return == 0, the dictID could not be decoded.
* This could for one of the following reasons :
- * - The frame does not require a dictionary to be decoded (most common case).
- * - The frame was built with dictID intentionally removed. Whatever dictionary is necessary is a hidden information.
+ * - The frame does not require a dictionary (most common case).
+ * - The frame was built with dictID intentionally removed.
+ * Needed dictionary is a hidden information.
* Note : this use case also happens when using a non-conformant dictionary.
- * - `srcSize` is too small, and as a result, the frame header could not be decoded (only possible if `srcSize < ZSTD_FRAMEHEADERSIZE_MAX`).
+ * - `srcSize` is too small, and as a result, frame header could not be decoded.
+ * Note : possible if `srcSize < ZSTD_FRAMEHEADERSIZE_MAX`.
* - This is not a Zstandard frame.
- * When identifying the exact failure cause, it's possible to used ZSTD_getFrameParams(), which will provide a more precise error code. */
+ * When identifying the exact failure cause, it's possible to use
+ * ZSTD_getFrameParams(), which will provide a more precise error code. */
unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize)
{
ZSTD_frameParams zfp = { 0 , 0 , 0 , 0 };
@@ -2209,9 +2094,13 @@ size_t ZSTD_freeDStream(ZSTD_DStream* zds)
if (zds==NULL) return 0; /* support free on null */
{ ZSTD_customMem const cMem = zds->customMem;
ZSTD_freeDCtx(zds->dctx);
+ zds->dctx = NULL;
ZSTD_freeDDict(zds->ddictLocal);
+ zds->ddictLocal = NULL;
ZSTD_free(zds->inBuff, cMem);
+ zds->inBuff = NULL;
ZSTD_free(zds->outBuff, cMem);
+ zds->outBuff = NULL;
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1)
if (zds->legacyContext)
ZSTD_freeLegacyStreamContext(zds->legacyContext, zds->previousLegacyVersion);
@@ -2247,7 +2136,9 @@ size_t ZSTD_initDStream(ZSTD_DStream* zds)
return ZSTD_initDStream_usingDict(zds, NULL, 0);
}
-size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* zds, const ZSTD_DDict* ddict) /**< note : ddict will just be referenced, and must outlive decompression session */
+/* ZSTD_initDStream_usingDDict() :
+ * ddict will just be referenced, and must outlive decompression session */
+size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* zds, const ZSTD_DDict* ddict)
{
size_t const initResult = ZSTD_initDStream(zds);
zds->ddict = ddict;
@@ -2277,8 +2168,11 @@ size_t ZSTD_setDStreamParameter(ZSTD_DStream* zds,
size_t ZSTD_sizeof_DStream(const ZSTD_DStream* zds)
{
- if (zds==NULL) return 0; /* support sizeof on NULL */
- return sizeof(*zds) + ZSTD_sizeof_DCtx(zds->dctx) + ZSTD_sizeof_DDict(zds->ddictLocal) + zds->inBuffSize + zds->outBuffSize;
+ if (zds==NULL) return 0; /* support sizeof NULL */
+ return sizeof(*zds)
+ + ZSTD_sizeof_DCtx(zds->dctx)
+ + ZSTD_sizeof_DDict(zds->ddictLocal)
+ + zds->inBuffSize + zds->outBuffSize;
}
@@ -2376,15 +2270,17 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
zds->blockSize = blockSize;
if (zds->inBuffSize < blockSize) {
ZSTD_free(zds->inBuff, zds->customMem);
- zds->inBuffSize = blockSize;
+ zds->inBuffSize = 0;
zds->inBuff = (char*)ZSTD_malloc(blockSize, zds->customMem);
if (zds->inBuff == NULL) return ERROR(memory_allocation);
+ zds->inBuffSize = blockSize;
}
if (zds->outBuffSize < neededOutSize) {
ZSTD_free(zds->outBuff, zds->customMem);
- zds->outBuffSize = neededOutSize;
+ zds->outBuffSize = 0;
zds->outBuff = (char*)ZSTD_malloc(neededOutSize, zds->customMem);
if (zds->outBuff == NULL) return ERROR(memory_allocation);
+ zds->outBuffSize = neededOutSize;
} }
zds->stage = zdss_read;
/* pass-through */
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-05 06:06:23 +0000