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Code Issues Releases 1 Activity

Add literalCompressionMode to stable cParams

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This commit is contained in:
Sen Huang 2021-04-16 10:10:26 -07:00 committed by senhuang42
parent 12c045f74d
commit 3c595a4a79
2 changed files with 16 additions and 19 deletions
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6
doc/zstd_manual.html
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@ -270,6 +270,10 @@ size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx);
* The higher the value of selected strategy, the more complex it is,
* resulting in stronger and slower compression.
* Special: value 0 means "use default strategy". */
ZSTD_c_literalCompressionMode=108, </b>/* Controls how the literals are compressed (default is auto).<b>
* The value must be of type ZSTD_literalCompressionMode_e.
* See ZSTD_literalCompressionMode_t enum definition for details.
*/
</b>/* LDM mode parameters */<b>
ZSTD_c_enableLongDistanceMatching=160, </b>/* Enable long distance matching.<b>
@ -349,7 +353,6 @@ size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx);
* ZSTD_c_format
* ZSTD_c_forceMaxWindow
* ZSTD_c_forceAttachDict
* ZSTD_c_literalCompressionMode
* ZSTD_c_targetCBlockSize
* ZSTD_c_srcSizeHint
* ZSTD_c_enableDedicatedDictSearch
@ -365,7 +368,6 @@ size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx);
ZSTD_c_experimentalParam2=10,
ZSTD_c_experimentalParam3=1000,
ZSTD_c_experimentalParam4=1001,
ZSTD_c_experimentalParam5=1002,
ZSTD_c_experimentalParam6=1003,
ZSTD_c_experimentalParam7=1004,
ZSTD_c_experimentalParam8=1005,

29
lib/zstd.h
View File

@ -266,6 +266,14 @@ typedef enum { ZSTD_fast=1,
Only the order (from fast to strong) is guaranteed */
} ZSTD_strategy;
typedef enum {
ZSTD_lcm_auto = 0, /**< Automatically determine the compression mode based on the compression level.
* Negative compression levels will be uncompressed, and positive compression
* levels will be compressed. */
ZSTD_lcm_huffman = 1, /**< Always attempt Huffman compression. Uncompressed literals will still be
* emitted if Huffman compression is not profitable. */
ZSTD_lcm_uncompressed = 2 /**< Always emit uncompressed literals. */
} ZSTD_literalCompressionMode_e;
typedef enum {
@ -332,6 +340,10 @@ typedef enum {
* The higher the value of selected strategy, the more complex it is,
* resulting in stronger and slower compression.
* Special: value 0 means "use default strategy". */
ZSTD_c_literalCompressionMode=108, /* Controls how the literals are compressed (default is auto).
* The value must be of type ZSTD_literalCompressionMode_e.
* See ZSTD_literalCompressionMode_e enum definition for details.
*/
/* LDM mode parameters */
ZSTD_c_enableLongDistanceMatching=160, /* Enable long distance matching.
@ -411,7 +423,6 @@ typedef enum {
* ZSTD_c_format
* ZSTD_c_forceMaxWindow
* ZSTD_c_forceAttachDict
* ZSTD_c_literalCompressionMode
* ZSTD_c_targetCBlockSize
* ZSTD_c_srcSizeHint
* ZSTD_c_enableDedicatedDictSearch
@ -429,7 +440,6 @@ typedef enum {
ZSTD_c_experimentalParam2=10,
ZSTD_c_experimentalParam3=1000,
ZSTD_c_experimentalParam4=1001,
ZSTD_c_experimentalParam5=1002,
ZSTD_c_experimentalParam6=1003,
ZSTD_c_experimentalParam7=1004,
ZSTD_c_experimentalParam8=1005,
@ -1265,15 +1275,6 @@ typedef enum {
ZSTD_dictForceLoad = 3 /* Always reload the dictionary */
} ZSTD_dictAttachPref_e;
typedef enum {
ZSTD_lcm_auto = 0, /**< Automatically determine the compression mode based on the compression level.
* Negative compression levels will be uncompressed, and positive compression
* levels will be compressed. */
ZSTD_lcm_huffman = 1, /**< Always attempt Huffman compression. Uncompressed literals will still be
* emitted if Huffman compression is not profitable. */
ZSTD_lcm_uncompressed = 2 /**< Always emit uncompressed literals. */
} ZSTD_literalCompressionMode_e;
typedef enum {
ZSTD_urm_auto = 0, /* Automatically determine whether or not we use row matchfinder */
ZSTD_urm_disableRowMatchFinder = 1, /* Never use row matchfinder */
@ -1689,12 +1690,6 @@ ZSTDLIB_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const void* pre
* See the comments on that enum for an explanation of the feature. */
#define ZSTD_c_forceAttachDict ZSTD_c_experimentalParam4
/* Controls how the literals are compressed (default is auto).
* The value must be of type ZSTD_literalCompressionMode_e.
* See ZSTD_literalCompressionMode_t enum definition for details.
*/
#define ZSTD_c_literalCompressionMode ZSTD_c_experimentalParam5
/* Tries to fit compressed block size to be around targetCBlockSize.
* No target when targetCBlockSize == 0.
* There is no guarantee on compressed block size (default:0) */