zstd_v05.h File Reference

#include <stddef.h>
#include "../common/mem.h"

Go to the source code of this file.

Data Structures
struct	ZSTDv05_parameters

Macros
#define	ZSTDv05_MAGICNUMBER   0xFD2FB525 /* v0.5 */

Enumerations
enum	ZSTDv05_strategy {   ZSTDv05_fast , ZSTDv05_greedy , ZSTDv05_lazy , ZSTDv05_lazy2 ,   ZSTDv05_btlazy2 , ZSTDv05_opt , ZSTDv05_btopt }

Functions
size_t	ZSTDv05_decompress (void *dst, size_t dstCapacity, const void *src, size_t compressedSize)
void	ZSTDv05_findFrameSizeInfoLegacy (const void *src, size_t srcSize, size_t *cSize, unsigned long long *dBound)
unsigned	ZSTDv05_isError (size_t code)
const char *	ZSTDv05_getErrorName (size_t code)
ZSTDv05_DCtx *	ZSTDv05_createDCtx (void)
size_t	ZSTDv05_freeDCtx (ZSTDv05_DCtx *dctx)
size_t	ZSTDv05_decompressDCtx (ZSTDv05_DCtx *ctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize)
size_t	ZSTDv05_decompress_usingDict (ZSTDv05_DCtx *dctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize, const void *dict, size_t dictSize)
size_t	ZSTDv05_getFrameParams (ZSTDv05_parameters *params, const void *src, size_t srcSize)
size_t	ZSTDv05_decompressBegin_usingDict (ZSTDv05_DCtx *dctx, const void *dict, size_t dictSize)
void	ZSTDv05_copyDCtx (ZSTDv05_DCtx *dstDCtx, const ZSTDv05_DCtx *srcDCtx)
size_t	ZSTDv05_nextSrcSizeToDecompress (ZSTDv05_DCtx *dctx)
size_t	ZSTDv05_decompressContinue (ZSTDv05_DCtx *dctx, void *dst, size_t dstCapacity, const void *src, size_t srcSize)
ZBUFFv05_DCtx *	ZBUFFv05_createDCtx (void)
size_t	ZBUFFv05_freeDCtx (ZBUFFv05_DCtx *dctx)
size_t	ZBUFFv05_decompressInit (ZBUFFv05_DCtx *dctx)
size_t	ZBUFFv05_decompressInitDictionary (ZBUFFv05_DCtx *dctx, const void *dict, size_t dictSize)
size_t	ZBUFFv05_decompressContinue (ZBUFFv05_DCtx *dctx, void *dst, size_t *dstCapacityPtr, const void *src, size_t *srcSizePtr)
unsigned	ZBUFFv05_isError (size_t errorCode)
const char *	ZBUFFv05_getErrorName (size_t errorCode)
size_t	ZBUFFv05_recommendedDInSize (void)
size_t	ZBUFFv05_recommendedDOutSize (void)

Macro Definition Documentation

ZSTDv05_MAGICNUMBER

#define ZSTDv05_MAGICNUMBER   0xFD2FB525 /* v0.5 */

Enumeration Type Documentation

ZSTDv05_strategy

enum ZSTDv05_strategy

Enumerator
ZSTDv05_fast
ZSTDv05_greedy
ZSTDv05_lazy
ZSTDv05_lazy2
ZSTDv05_btlazy2
ZSTDv05_opt
ZSTDv05_btopt

Function Documentation

ZBUFFv05_createDCtx()

ZBUFFv05_DCtx * ZBUFFv05_createDCtx

(

void

)

ZBUFFv05_decompressContinue()

size_t ZBUFFv05_decompressContinue	(	ZBUFFv05_DCtx *	dctx,
		void *	dst,
		size_t *	dstCapacityPtr,
		const void *	src,
		size_t *	srcSizePtr )

ZBUFFv05_decompressInit()

size_t ZBUFFv05_decompressInit

(

ZBUFFv05_DCtx *

dctx

)

ZBUFFv05_decompressInitDictionary()

size_t ZBUFFv05_decompressInitDictionary	(	ZBUFFv05_DCtx *	dctx,
		const void *	dict,
		size_t	dictSize )

ZBUFFv05_freeDCtx()

size_t ZBUFFv05_freeDCtx

(

ZBUFFv05_DCtx *

dctx

)

ZBUFFv05_getErrorName()

const char * ZBUFFv05_getErrorName

(

size_t

errorCode

)

ZBUFFv05_isError()

unsigned ZBUFFv05_isError

(

size_t

errorCode

)

ZBUFFv05_recommendedDInSize()

size_t ZBUFFv05_recommendedDInSize

(

void

)

Functions below provide recommended buffer sizes for Compression or Decompression operations. These sizes are just hints, and tend to offer better latency

ZBUFFv05_recommendedDOutSize()

size_t ZBUFFv05_recommendedDOutSize

(

void

)

ZSTDv05_copyDCtx()

void ZSTDv05_copyDCtx	(	ZSTDv05_DCtx *	dstDCtx,
		const ZSTDv05_DCtx *	srcDCtx )

ZSTDv05_createDCtx()

ZSTDv05_DCtx * ZSTDv05_createDCtx

(

void

)

ZSTDv05_decompress()

size_t ZSTDv05_decompress	(	void *	dst,
		size_t	dstCapacity,
		const void *	src,
		size_t	compressedSize )

ZSTDv05_decompress() : compressedSize : is the exact size of the compressed blob, otherwise decompression will fail. dstCapacity must be large enough, equal or larger than originalSize.

Returns

: the number of bytes decompressed into dst (<= dstCapacity), or an errorCode if it fails (which can be tested using ZSTDv05_isError())

ZSTDv05_decompress_usingDict()

size_t ZSTDv05_decompress_usingDict	(	ZSTDv05_DCtx *	dctx,
		void *	dst,
		size_t	dstCapacity,
		const void *	src,
		size_t	srcSize,
		const void *	dict,
		size_t	dictSize )

ZSTDv05_decompress_usingDict() : Decompression using a pre-defined Dictionary content (see dictBuilder). Dictionary must be identical to the one used during compression, otherwise regenerated data will be corrupted. Note : dict can be NULL, in which case, it's equivalent to ZSTDv05_decompressDCtx()

ZSTDv05_decompressBegin_usingDict()

size_t ZSTDv05_decompressBegin_usingDict	(	ZSTDv05_DCtx *	dctx,
		const void *	dict,
		size_t	dictSize )

ZSTDv05_decompressContinue()

size_t ZSTDv05_decompressContinue	(	ZSTDv05_DCtx *	dctx,
		void *	dst,
		size_t	dstCapacity,
		const void *	src,
		size_t	srcSize )

ZSTDv05_decompressDCtx()

size_t ZSTDv05_decompressDCtx	(	ZSTDv05_DCtx *	ctx,
		void *	dst,
		size_t	dstCapacity,
		const void *	src,
		size_t	srcSize )

ZSTDv05_decompressDCtx() : Same as ZSTDv05_decompress(), but requires an already allocated ZSTDv05_DCtx (see ZSTDv05_createDCtx())

ZSTDv05_findFrameSizeInfoLegacy()

void ZSTDv05_findFrameSizeInfoLegacy	(	const void *	src,
		size_t	srcSize,
		size_t *	cSize,
		unsigned long long *	dBound )

ZSTDv05_findFrameSizeInfoLegacy() : get the source length and decompressed bound of a ZSTD frame compliant with v0.5.x format srcSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src' cSize (output parameter) : the number of bytes that would be read to decompress this frame or an error code if it fails (which can be tested using ZSTDv01_isError()) dBound (output parameter) : an upper-bound for the decompressed size of the data in the frame or ZSTD_CONTENTSIZE_ERROR if an error occurs

note : assumes cSize and dBound are not NULL.

ZSTDv05_freeDCtx()

size_t ZSTDv05_freeDCtx

(

ZSTDv05_DCtx *

dctx

)

Returns

: errorCode

ZSTDv05_getErrorName()

const char * ZSTDv05_getErrorName

(

size_t

code

)

provides readable string for an error code

ZSTDv05_getErrorName() : provides error code string (useful for debugging)

ZSTDv05_getFrameParams()

size_t ZSTDv05_getFrameParams	(	ZSTDv05_parameters *	params,
		const void *	src,
		size_t	srcSize )

ZSTDv05_isError()

unsigned ZSTDv05_isError

(

size_t

code

)

tells if a size_t function result is an error code

ZSTDv05_isError() : tells if a return value is an error code

ZSTDv05_nextSrcSizeToDecompress()

size_t ZSTDv05_nextSrcSizeToDecompress

(

ZSTDv05_DCtx *

dctx

)