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separated ZSTD_estimateCStreamSize() from ZSTD_estimateCCtxSize()

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for clarity
This commit is contained in:
Yann Collet
2017-05-08 18:24:16 -07:00
parent 51652522a2
commit fa8dadb294
4 changed files with 32 additions and 22 deletions
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lib/zstd.h
+7 -5
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@@ -463,11 +463,8 @@ ZSTDLIB_API unsigned long long ZSTD_findDecompressedSize(const void* src, size_t
ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem);
/*! ZSTD_estimateCCtxSize() :
* Provides amount of memory needed to allocate ZSTD_CCtx with a set of compression parameters.
* Set streaming to 1 if the CCtx will be used for streaming (CStream).
* Special case : when using ZSTD_initCStream_usingDict(), init will transparently create an internal CDict.
* Use ZSTD_estimateCDictSize() and add this value to estimate total CCtx size */
ZSTDLIB_API size_t ZSTD_estimateCCtxSize(ZSTD_compressionParameters cParams, unsigned streaming);
* Provides amount of memory needed to allocate ZSTD_CCtx with a set of compression parameters. */
ZSTDLIB_API size_t ZSTD_estimateCCtxSize(ZSTD_compressionParameters cParams);
/*! ZSTD_sizeofCCtx() :
* amount of used memory is variable, depending primarily on compression level */
@@ -609,6 +606,11 @@ ZSTDLIB_API unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize);
/*===== Advanced Streaming compression functions =====*/
ZSTDLIB_API ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem);
/*! ZSTD_estimateCStreamSize() :
* Provides amount of memory needed to allocate ZSTD_CStream with a set of compression parameters.
* Special case : when using ZSTD_initCStream_usingDict(), init will transparently create an internal CDict.
* Use ZSTD_estimateCDictSize() to estimate its size, and add for total CStream size */
ZSTDLIB_API size_t ZSTD_estimateCStreamSize(ZSTD_compressionParameters cParams);
ZSTDLIB_API size_t ZSTD_sizeof_CStream(const ZSTD_CStream* zcs); /**< same as ZSTD_sizeof_CCtx */
ZSTDLIB_API size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pledgedSrcSize); /**< pledgedSrcSize must be correct, a size of 0 means unknown. for a frame size of 0 use initCStream_advanced */
ZSTDLIB_API size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel); /**< note: a dict will not be used if dict == NULL or dictSize < 8. This result in the creation of an internal CDict */