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Added advanced compression functions

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This commit is contained in:
Yann Collet
2015-10-21 09:07:25 +01:00
parent 1c00dc3e24
commit 7010c27a13
4 changed files with 93 additions and 70 deletions
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lib/zstd.h
+27 -13
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@@ -36,15 +36,15 @@
extern "C" {
#endif
/**************************************
/* *************************************
* Includes
**************************************/
***************************************/
#include <stddef.h> /* size_t */
/**************************************
/* *************************************
* Version
**************************************/
***************************************/
#define ZSTD_VERSION_MAJOR 0 /* for breaking interface changes */
#define ZSTD_VERSION_MINOR 2 /* for new (non-breaking) interface capabilities */
#define ZSTD_VERSION_RELEASE 0 /* for tweaks, bug-fixes, or development */
@@ -52,16 +52,16 @@ extern "C" {
unsigned ZSTD_versionNumber (void);
/**************************************
/* *************************************
* Simple functions
**************************************/
***************************************/
size_t ZSTD_compress( void* dst, size_t maxDstSize,
const void* src, size_t srcSize);
size_t ZSTD_decompress( void* dst, size_t maxOriginalSize,
const void* src, size_t compressedSize);
/*
/**
ZSTD_compress() :
Compresses 'srcSize' bytes from buffer 'src' into buffer 'dst', of maximum size 'dstSize'.
Destination buffer must be already allocated.
@@ -73,19 +73,33 @@ ZSTD_decompress() :
compressedSize : is the exact source size
maxOriginalSize : is the size of the 'dst' buffer, which must be already allocated.
It must be equal or larger than originalSize, otherwise decompression will fail.
return : the number of bytes decompressed into destination buffer (originalSize <= maxOriginalSize)
return : the number of bytes decompressed into destination buffer (<= maxOriginalSize)
or an errorCode if it fails (which can be tested using ZSTD_isError())
*/
/**************************************
/* *************************************
* Tool functions
**************************************/
size_t ZSTD_compressBound(size_t srcSize); /* maximum compressed size (worst case scenario) */
***************************************/
size_t ZSTD_compressBound(size_t srcSize); /** maximum compressed size (worst case scenario) */
/* Error Management */
unsigned ZSTD_isError(size_t code); /* tells if a return value is an error code */
const char* ZSTD_getErrorName(size_t code); /* provides error code string */
unsigned ZSTD_isError(size_t code); /** tells if a return value is an error code */
const char* ZSTD_getErrorName(size_t code); /** provides error code string */
/* *************************************
* Advanced functions
***************************************/
typedef struct ZSTD_Cctx_s ZSTD_Cctx; /* incomplete type */
ZSTD_Cctx* ZSTD_createCCtx(void);
size_t ZSTD_freeCCtx(ZSTD_Cctx* cctx);
/**
ZSTD_compressCCtx() :
Same as ZSTD_compress(), but requires a ZSTD_Cctx working space already allocated
*/
//size_t ZSTD_compressCCtx(ZSTD_Cctx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
#if defined (__cplusplus)