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added fast mode

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This commit is contained in:
Yann Collet
2015-11-05 17:32:18 +01:00
parent 47b68908b2
commit 1f44b3f778
5 changed files with 163 additions and 58 deletions
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lib/zstdhc_static.h
+6 -6
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@@ -46,12 +46,12 @@ extern "C" {
* Types
***************************************/
/** from faster to stronger */
typedef enum { ZSTD_HC_greedy, ZSTD_HC_lazy, ZSTD_HC_lazy2, ZSTD_HC_btlazy2 } ZSTD_HC_strategy;
typedef enum { ZSTD_HC_fast, ZSTD_HC_greedy, ZSTD_HC_lazy, ZSTD_HC_lazy2, ZSTD_HC_btlazy2 } ZSTD_HC_strategy;
typedef struct
{
U32 windowLog; /* largest match distance : impact decompression buffer size */
U32 chainLog; /* full search distance : larger == more compression, slower, more memory*/
U32 contentLog; /* full search segment : larger == more compression, slower, more memory*/
U32 hashLog; /* dispatch table : larger == more memory, faster*/
U32 searchLog; /* nb of searches : larger == more compression, slower*/
U32 searchLength; /* size of matches : larger == faster decompression */
@@ -61,13 +61,13 @@ typedef struct
/* parameters boundaries */
#define ZSTD_HC_WINDOWLOG_MAX 26
#define ZSTD_HC_WINDOWLOG_MIN 18
#define ZSTD_HC_CHAINLOG_MAX (ZSTD_HC_WINDOWLOG_MAX+1)
#define ZSTD_HC_CHAINLOG_MIN 4
#define ZSTD_HC_CONTENTLOG_MAX (ZSTD_HC_WINDOWLOG_MAX+1)
#define ZSTD_HC_CONTENTLOG_MIN 4
#define ZSTD_HC_HASHLOG_MAX 28
#define ZSTD_HC_HASHLOG_MIN 4
#define ZSTD_HC_SEARCHLOG_MAX (ZSTD_HC_CHAINLOG_MAX-1)
#define ZSTD_HC_SEARCHLOG_MAX (ZSTD_HC_CONTENTLOG_MAX-1)
#define ZSTD_HC_SEARCHLOG_MIN 1
#define ZSTD_HC_SEARCHLENGTH_MAX 6
#define ZSTD_HC_SEARCHLENGTH_MAX 7
#define ZSTD_HC_SEARCHLENGTH_MIN 4