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Merge pull request #1174 from duc0/document_default_level

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Expose ZSTD_CLEVEL_DEFAULT and update documentation
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Yann Collet 2018-06-12 12:09:01 -07:00 committed by GitHub
commit b2632bcf6c
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2 changed files with 7 additions and 10 deletions
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9
lib/compress/zstd_compress.c
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@ -8,15 +8,6 @@
* You may select, at your option, one of the above-listed licenses.
*/
/*-*************************************
* Tuning parameters
***************************************/
#ifndef ZSTD_CLEVEL_DEFAULT
# define ZSTD_CLEVEL_DEFAULT 3
#endif
/*-*************************************
* Dependencies
***************************************/

8
lib/zstd.h
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@ -70,6 +70,12 @@ ZSTDLIB_API unsigned ZSTD_versionNumber(void); /**< useful to check dll versio
#define ZSTD_VERSION_STRING ZSTD_EXPAND_AND_QUOTE(ZSTD_LIB_VERSION)
ZSTDLIB_API const char* ZSTD_versionString(void); /* added in v1.3.0 */
/***************************************
* Default constant
***************************************/
#ifndef ZSTD_CLEVEL_DEFAULT
# define ZSTD_CLEVEL_DEFAULT 3
#endif
/***************************************
* Simple API
@ -948,7 +954,7 @@ typedef enum {
/* compression parameters */
ZSTD_p_compressionLevel=100, /* Update all compression parameters according to pre-defined cLevel table
* Default level is ZSTD_CLEVEL_DEFAULT==3.
* Special: value 0 means "do not change cLevel".
* Special: value 0 means default, which is controlled by ZSTD_CLEVEL_DEFAULT.
* Note 1 : it's possible to pass a negative compression level by casting it to unsigned type.
* Note 2 : setting a level sets all default values of other compression parameters.
* Note 3 : setting compressionLevel automatically updates ZSTD_p_compressLiterals. */