return 0;
}
-/**
- * Contains the compressed frame size and an upper-bound for the decompressed frame size.
- * Note: before using `compressedSize` you must check for errors using ZSTD_isError().
- * similarly, before using `decompressedBound`, you must check for errors using:
- * `decompressedBound` != ZSTD_CONTENTSIZE_ERROR
- */
-typedef struct {
- size_t compressedSize;
- unsigned long long decompressedBound;
-} ZSTD_frameSizeInfo;
-
static ZSTD_frameSizeInfo ZSTD_errorFrameSizeInfo(size_t ret)
{
ZSTD_frameSizeInfo frameSizeInfo;
memset(&frameSizeInfo, 0, sizeof(ZSTD_frameSizeInfo));
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1)
- if (ZSTD_isLegacy(src, srcSize))
- return ZSTD_errorFrameSizeInfo(ZSTD_findFrameCompressedSizeLegacy(src, srcSize));
+ if (ZSTD_isLegacy(src, srcSize)) {
+ return ZSTD_findFrameSizeInfoLegacy(src, srcSize);
+ }
#endif
if ((srcSize >= ZSTD_SKIPPABLEHEADERSIZE)
}
}
-MEM_STATIC size_t ZSTD_findFrameCompressedSizeLegacy(const void *src,
- size_t compressedSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
{
- U32 const version = ZSTD_isLegacy(src, compressedSize);
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+MEM_STATIC ZSTD_frameSizeInfo ZSTD_findFrameSizeInfoLegacy(const void *src, size_t srcSize)
+{
+ ZSTD_frameSizeInfo frameSizeInfo;
+ memset(&frameSizeInfo, 0, sizeof(ZSTD_frameSizeInfo));
+ U32 const version = ZSTD_isLegacy(src, srcSize);
switch(version)
{
#if (ZSTD_LEGACY_SUPPORT <= 1)
case 1 :
- return ZSTDv01_findFrameCompressedSize(src, compressedSize);
+ ZSTDv01_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 2)
case 2 :
- return ZSTDv02_findFrameCompressedSize(src, compressedSize);
+ ZSTDv02_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 3)
case 3 :
- return ZSTDv03_findFrameCompressedSize(src, compressedSize);
+ ZSTDv03_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 4)
case 4 :
- return ZSTDv04_findFrameCompressedSize(src, compressedSize);
+ ZSTDv04_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 5)
case 5 :
- return ZSTDv05_findFrameCompressedSize(src, compressedSize);
+ ZSTDv05_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 6)
case 6 :
- return ZSTDv06_findFrameCompressedSize(src, compressedSize);
+ ZSTDv06_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
#if (ZSTD_LEGACY_SUPPORT <= 7)
case 7 :
- return ZSTDv07_findFrameCompressedSize(src, compressedSize);
+ ZSTDv07_findFrameSizeInfoLegacy(src, srcSize,
+ &frameSizeInfo.compressedSize, &frameSizeInfo.decompressedBound);
+ break;
#endif
default :
- return ERROR(prefix_unknown);
+ ZSTD_errorFrameSizeInfoLegacy(&frameSizeInfo.compressedSize,
+ &frameSizeInfo.decompressedBound, ERROR(prefix_unknown));
+ break;
}
+ return frameSizeInfo;
+}
+
+MEM_STATIC size_t ZSTD_findFrameCompressedSizeLegacy(const void *src, size_t srcSize)
+{
+ ZSTD_frameSizeInfo frameSizeInfo = ZSTD_findFrameSizeInfoLegacy(src, srcSize);
+ return frameSizeInfo.compressedSize;
}
MEM_STATIC size_t ZSTD_freeLegacyStreamContext(void* legacyContext, U32 version)
#define LITERAL_NOENTROPY 63
#define COMMAND_NOENTROPY 7 /* to remove */
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
static const size_t ZSTD_blockHeaderSize = 3;
static const size_t ZSTD_frameHeaderSize = 4;
return ZSTDv01_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize);
}
-size_t ZSTDv01_findFrameCompressedSize(const void* src, size_t srcSize)
+static void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv01_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
U32 magicNumber;
blockProperties_t blockProperties;
/* Frame Header */
- if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
magicNumber = ZSTD_readBE32(src);
- if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown);
+ if (magicNumber != ZSTD_magicNumber) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_frameHeaderSize;
/* Loop on each block */
while (1)
{
size_t blockSize = ZSTDv01_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTDv01_isError(blockSize)) return blockSize;
+ if (ZSTDv01_isError(blockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, blockSize);
+ return;
+ }
ip += ZSTD_blockHeaderSize;
remainingSize -= ZSTD_blockHeaderSize;
- if (blockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (blockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (blockSize == 0) break; /* bt_end */
ip += blockSize;
remainingSize -= blockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * BLOCKSIZE;
}
/*******************************
size_t ZSTDv01_decompress( void* dst, size_t maxOriginalSize,
const void* src, size_t compressedSize);
-/**
-ZSTDv01_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.1.x format
- compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
- return : the number of bytes that would be read to decompress this frame
- or an errorCode if it fails (which can be tested using ZSTDv01_isError())
-*/
-size_t ZSTDv01_findFrameCompressedSize(const void* src, size_t compressedSize);
+ /**
+ ZSTDv01_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.1.x format
+ compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
+ return : the number of bytes that would be read to decompress this frame
+ or an errorCode if it fails (which can be tested using ZSTDv01_isError())
+ */
+void ZSTDv01_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/**
ZSTDv01_isError() : tells if the result of ZSTDv01_decompress() is an error
#define LITERAL_NOENTROPY 63
#define COMMAND_NOENTROPY 7 /* to remove */
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
static const size_t ZSTD_blockHeaderSize = 3;
static const size_t ZSTD_frameHeaderSize = 4;
return ZSTD_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize);
}
-static size_t ZSTD_findFrameCompressedSize(const void *src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+void ZSTDv02_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
+{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
U32 magicNumber;
blockProperties_t blockProperties;
/* Frame Header */
- if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
magicNumber = MEM_readLE32(src);
- if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown);
+ if (magicNumber != ZSTD_magicNumber) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_frameHeaderSize;
/* Loop on each block */
while (1)
{
size_t cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTD_isError(cBlockSize)) return cBlockSize;
+ if (ZSTD_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTD_blockHeaderSize;
remainingSize -= ZSTD_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (cBlockSize == 0) break; /* bt_end */
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * BLOCKSIZE;
}
/*******************************
return ZSTD_decompress(dst, maxOriginalSize, src, compressedSize);
}
-size_t ZSTDv02_findFrameCompressedSize(const void *src, size_t compressedSize)
-{
- return ZSTD_findFrameCompressedSize(src, compressedSize);
-}
-
ZSTDv02_Dctx* ZSTDv02_createDCtx(void)
{
return (ZSTDv02_Dctx*)ZSTD_createDCtx();
size_t ZSTDv02_decompress( void* dst, size_t maxOriginalSize,
const void* src, size_t compressedSize);
-/**
-ZSTDv02_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.2.x format
- compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
- return : the number of bytes that would be read to decompress this frame
- or an errorCode if it fails (which can be tested using ZSTDv02_isError())
-*/
-size_t ZSTDv02_findFrameCompressedSize(const void* src, size_t compressedSize);
+ /**
+ ZSTDv02_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.2.x format
+ compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
+ return : the number of bytes that would be read to decompress this frame
+ or an errorCode if it fails (which can be tested using ZSTDv02_isError())
+ */
+void ZSTDv02_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/**
ZSTDv02_isError() : tells if the result of ZSTDv02_decompress() is an error
#define LITERAL_NOENTROPY 63
#define COMMAND_NOENTROPY 7 /* to remove */
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
static const size_t ZSTD_blockHeaderSize = 3;
static const size_t ZSTD_frameHeaderSize = 4;
return ZSTD_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize);
}
-static size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv03_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
U32 magicNumber;
blockProperties_t blockProperties;
/* Frame Header */
- if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
magicNumber = MEM_readLE32(src);
- if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown);
+ if (magicNumber != ZSTD_magicNumber) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_frameHeaderSize;
/* Loop on each block */
while (1)
{
size_t cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTD_isError(cBlockSize)) return cBlockSize;
+ if (ZSTD_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTD_blockHeaderSize;
remainingSize -= ZSTD_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (cBlockSize == 0) break; /* bt_end */
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * BLOCKSIZE;
}
return ZSTD_decompress(dst, maxOriginalSize, src, compressedSize);
}
-size_t ZSTDv03_findFrameCompressedSize(const void* src, size_t srcSize)
-{
- return ZSTD_findFrameCompressedSize(src, srcSize);
-}
-
ZSTDv03_Dctx* ZSTDv03_createDCtx(void)
{
return (ZSTDv03_Dctx*)ZSTD_createDCtx();
size_t ZSTDv03_decompress( void* dst, size_t maxOriginalSize,
const void* src, size_t compressedSize);
-/**
-ZSTDv03_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.3.x format
- compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
- return : the number of bytes that would be read to decompress this frame
- or an errorCode if it fails (which can be tested using ZSTDv03_isError())
-*/
-size_t ZSTDv03_findFrameCompressedSize(const void* src, size_t compressedSize);
+ /**
+ ZSTDv03_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.3.x format
+ compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
+ return : the number of bytes that would be read to decompress this frame
+ or an errorCode if it fails (which can be tested using ZSTDv03_isError())
+ */
+ void ZSTDv03_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/**
ZSTDv03_isError() : tells if the result of ZSTDv03_decompress() is an error
#define MIN_SEQUENCES_SIZE (2 /*seqNb*/ + 2 /*dumps*/ + 3 /*seqTables*/ + 1 /*bitStream*/)
#define MIN_CBLOCK_SIZE (3 /*litCSize*/ + MIN_SEQUENCES_SIZE)
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
typedef enum { bt_compressed, bt_raw, bt_rle, bt_end } blockType_t;
return op-ostart;
}
-static size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv04_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
blockProperties_t blockProperties;
/* Frame Header */
- if (srcSize < ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong);
- if (MEM_readLE32(src) != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
+ if (srcSize < ZSTD_frameHeaderSize_min) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
+ if (MEM_readLE32(src) != ZSTD_MAGICNUMBER) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
ip += ZSTD_frameHeaderSize_min; remainingSize -= ZSTD_frameHeaderSize_min;
/* Loop on each block */
while (1)
{
size_t cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTD_isError(cBlockSize)) return cBlockSize;
+ if (ZSTD_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTD_blockHeaderSize;
remainingSize -= ZSTD_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (cBlockSize == 0) break; /* bt_end */
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * BLOCKSIZE;
}
/* ******************************
#endif
}
-size_t ZSTDv04_findFrameCompressedSize(const void* src, size_t srcSize)
-{
- return ZSTD_findFrameCompressedSize(src, srcSize);
-}
-
size_t ZSTDv04_resetDCtx(ZSTDv04_Dctx* dctx) { return ZSTD_resetDCtx(dctx); }
size_t ZSTDv04_nextSrcSizeToDecompress(ZSTDv04_Dctx* dctx)
size_t ZSTDv04_decompress( void* dst, size_t maxOriginalSize,
const void* src, size_t compressedSize);
-/**
-ZSTDv04_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.4.x format
- compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
- return : the number of bytes that would be read to decompress this frame
- or an errorCode if it fails (which can be tested using ZSTDv04_isError())
-*/
-size_t ZSTDv04_findFrameCompressedSize(const void* src, size_t compressedSize);
+ /**
+ ZSTDv04_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.4.x format
+ compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
+ return : the number of bytes that would be read to decompress this frame
+ or an errorCode if it fails (which can be tested using ZSTDv04_isError())
+ */
+ void ZSTDv04_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/**
ZSTDv04_isError() : tells if the result of ZSTDv04_decompress() is an error
#define WILDCOPY_OVERLENGTH 8
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
typedef enum { bt_compressed, bt_raw, bt_rle, bt_end } blockType_t;
#endif
}
-size_t ZSTDv05_findFrameCompressedSize(const void *src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv05_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
blockProperties_t blockProperties;
/* Frame Header */
- if (srcSize < ZSTDv05_frameHeaderSize_min) return ERROR(srcSize_wrong);
- if (MEM_readLE32(src) != ZSTDv05_MAGICNUMBER) return ERROR(prefix_unknown);
+ if (srcSize < ZSTDv05_frameHeaderSize_min) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
+ if (MEM_readLE32(src) != ZSTDv05_MAGICNUMBER) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
ip += ZSTDv05_frameHeaderSize_min; remainingSize -= ZSTDv05_frameHeaderSize_min;
/* Loop on each block */
while (1)
{
size_t cBlockSize = ZSTDv05_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTDv05_isError(cBlockSize)) return cBlockSize;
+ if (ZSTDv05_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTDv05_blockHeaderSize;
remainingSize -= ZSTDv05_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (cBlockSize == 0) break; /* bt_end */
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * BLOCKSIZE;
}
/* ******************************
size_t ZSTDv05_decompress( void* dst, size_t dstCapacity,
const void* src, size_t compressedSize);
-/**
-ZSTDv05_getFrameSrcSize() : get the source length of a ZSTD frame
- compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
- return : the number of bytes that would be read to decompress this frame
- or an errorCode if it fails (which can be tested using ZSTDv05_isError())
-*/
-size_t ZSTDv05_findFrameCompressedSize(const void* src, size_t compressedSize);
+ /**
+ ZSTDv05_getFrameSrcSize() : get the source length of a ZSTD frame
+ compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src'
+ return : the number of bytes that would be read to decompress this frame
+ or an errorCode if it fails (which can be tested using ZSTDv05_isError())
+ */
+void ZSTDv05_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/* *************************************
* Helper functions
#define FSEv06_ENCODING_STATIC 2
#define FSEv06_ENCODING_DYNAMIC 3
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
static const U32 LL_bits[MaxLL+1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9,10,11,12,
13,14,15,16 };
#endif
}
-size_t ZSTDv06_findFrameCompressedSize(const void* src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv06_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
blockProperties_t blockProperties = { bt_compressed, 0 };
/* Frame Header */
{ size_t const frameHeaderSize = ZSTDv06_frameHeaderSize(src, ZSTDv06_frameHeaderSize_min);
- if (ZSTDv06_isError(frameHeaderSize)) return frameHeaderSize;
- if (MEM_readLE32(src) != ZSTDv06_MAGICNUMBER) return ERROR(prefix_unknown);
- if (srcSize < frameHeaderSize+ZSTDv06_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (ZSTDv06_isError(frameHeaderSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, frameHeaderSize);
+ return;
+ }
+ if (MEM_readLE32(src) != ZSTDv06_MAGICNUMBER) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
+ if (srcSize < frameHeaderSize+ZSTDv06_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
ip += frameHeaderSize; remainingSize -= frameHeaderSize;
}
/* Loop on each block */
while (1) {
size_t const cBlockSize = ZSTDv06_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTDv06_isError(cBlockSize)) return cBlockSize;
+ if (ZSTDv06_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTDv06_blockHeaderSize;
remainingSize -= ZSTDv06_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
if (cBlockSize == 0) break; /* bt_end */
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * ZSTDv06_BLOCKSIZE_MAX;
}
/*_******************************
return : the number of bytes that would be read to decompress this frame
or an errorCode if it fails (which can be tested using ZSTDv06_isError())
*/
-size_t ZSTDv06_findFrameCompressedSize(const void* src, size_t compressedSize);
+void ZSTDv06_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/* *************************************
* Helper functions
#define FSEv07_ENCODING_STATIC 2
#define FSEv07_ENCODING_DYNAMIC 3
+#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1)
+#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
+
static const U32 LL_bits[MaxLL+1] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9,10,11,12,
13,14,15,16 };
#endif
}
-size_t ZSTDv07_findFrameCompressedSize(const void* src, size_t srcSize)
+MEM_STATIC void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
+{
+ *cSize = ret;
+ *dBound = ZSTD_CONTENTSIZE_ERROR;
+}
+
+void ZSTDv07_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound)
{
const BYTE* ip = (const BYTE*)src;
size_t remainingSize = srcSize;
+ size_t nbBlocks = 0;
/* check */
- if (srcSize < ZSTDv07_frameHeaderSize_min+ZSTDv07_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (srcSize < ZSTDv07_frameHeaderSize_min+ZSTDv07_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
/* Frame Header */
{ size_t const frameHeaderSize = ZSTDv07_frameHeaderSize(src, ZSTDv07_frameHeaderSize_min);
- if (ZSTDv07_isError(frameHeaderSize)) return frameHeaderSize;
- if (MEM_readLE32(src) != ZSTDv07_MAGICNUMBER) return ERROR(prefix_unknown);
- if (srcSize < frameHeaderSize+ZSTDv07_blockHeaderSize) return ERROR(srcSize_wrong);
+ if (ZSTDv07_isError(frameHeaderSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, frameHeaderSize);
+ return;
+ }
+ if (MEM_readLE32(src) != ZSTDv07_MAGICNUMBER) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
+ return;
+ }
+ if (srcSize < frameHeaderSize+ZSTDv07_blockHeaderSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
ip += frameHeaderSize; remainingSize -= frameHeaderSize;
}
while (1) {
blockProperties_t blockProperties;
size_t const cBlockSize = ZSTDv07_getcBlockSize(ip, remainingSize, &blockProperties);
- if (ZSTDv07_isError(cBlockSize)) return cBlockSize;
+ if (ZSTDv07_isError(cBlockSize)) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
+ return;
+ }
ip += ZSTDv07_blockHeaderSize;
remainingSize -= ZSTDv07_blockHeaderSize;
if (blockProperties.blockType == bt_end) break;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+ if (cBlockSize > remainingSize) {
+ ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
+ return;
+ }
ip += cBlockSize;
remainingSize -= cBlockSize;
+ nbBlocks++;
}
- return ip - (const BYTE*)src;
+ *cSize = ip - (const BYTE*)src;
+ *dBound = nbBlocks * ZSTDv07_BLOCKSIZE_ABSOLUTEMAX;
}
/*_******************************
return : the number of bytes that would be read to decompress this frame
or an errorCode if it fails (which can be tested using ZSTDv07_isError())
*/
-size_t ZSTDv07_findFrameCompressedSize(const void* src, size_t compressedSize);
+void ZSTDv07_findFrameSizeInfoLegacy(const void *src, size_t srcSize,
+ size_t* cSize, unsigned long long* dBound);
/*====== Helper functions ======*/
ZSTDLIBv07_API unsigned ZSTDv07_isError(size_t code); /*!< tells if a `size_t` function result is an error code */
* Frame size functions
***************************************/
+/**
+ * Contains the compressed frame size and an upper-bound for the decompressed frame size.
+ * Note: before using `compressedSize` you must check for errors using ZSTD_isError().
+ * similarly, before using `decompressedBound`, you must check for errors using:
+ * `decompressedBound` != ZSTD_CONTENTSIZE_ERROR
+ */
+typedef struct {
+ size_t compressedSize;
+ unsigned long long decompressedBound;
+} ZSTD_frameSizeInfo;
+
/*! ZSTD_findDecompressedSize() :
* `src` should point to the start of a series of ZSTD encoded and/or skippable frames
* `srcSize` must be the _exact_ size of this series
static int testFrameDecoding(void)
{
- if (ZSTD_decompressBound(COMPRESSED, COMPRESSED_SIZE) != ZSTD_CONTENTSIZE_ERROR) {
- DISPLAY("ERROR: ZSTD_decompressBound: Expected to receive ZSTD_CONTENTSIZE_ERROR\n");
+ if (strlen(EXPECTED) > ZSTD_decompressBound(COMPRESSED, COMPRESSED_SIZE)) {
+ DISPLAY("ERROR: ZSTD_decompressBound: decompressed bound too small\n");
return 1;
}
DISPLAY("Frame Decoding OK\n");
projects / thirdparty / zstd.git / commitdiff
