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Integrate dictBuilder into libzstd

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This commit is contained in:
Yann Collet
2016-02-12 00:10:25 +01:00
parent 82260ddd8a
commit 7d36028078
24 changed files with 2658 additions and 3153 deletions
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lib/zstd_internal.h
+55 -10
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@@ -32,11 +32,7 @@
#ifndef ZSTD_CCOMMON_H_MODULE
#define ZSTD_CCOMMON_H_MODULE
#if defined (__cplusplus)
extern "C" {
#endif
/* *************************************
/*-*************************************
* Dependencies
***************************************/
#include "mem.h"
@@ -44,14 +40,14 @@ extern "C" {
#include "zstd_static.h"
/* *************************************
/*-*************************************
* Common macros
***************************************/
#define MIN(a,b) ((a)<(b) ? (a) : (b))
#define MAX(a,b) ((a)>(b) ? (a) : (b))
/* *************************************
/*-*************************************
* Common constants
***************************************/
#define ZSTD_MAGICNUMBER 0xFD2FB525 /* v0.5 */
@@ -130,9 +126,58 @@ MEM_STATIC void ZSTD_wildcopy(void* dst, const void* src, size_t length)
while (op < oend);
}
#if defined (__cplusplus)
MEM_STATIC unsigned ZSTD_highbit(U32 val)
{
# if defined(_MSC_VER) /* Visual */
unsigned long r=0;
_BitScanReverse(&r, val);
return (unsigned)r;
# elif defined(__GNUC__) && (__GNUC__ >= 3) /* GCC Intrinsic */
return 31 - __builtin_clz(val);
# else /* Software version */
static const int DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 };
U32 v = val;
int r;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
r = DeBruijnClz[(U32)(v * 0x07C4ACDDU) >> 27];
return r;
# endif
}
#endif
/*-*******************************************
* Private interfaces
*********************************************/
typedef struct {
void* buffer;
U32* offsetStart;
U32* offset;
BYTE* offCodeStart;
BYTE* offCode;
BYTE* litStart;
BYTE* lit;
BYTE* litLengthStart;
BYTE* litLength;
BYTE* matchLengthStart;
BYTE* matchLength;
BYTE* dumpsStart;
BYTE* dumps;
/* opt */
U32* matchLengthFreq;
U32* litLengthFreq;
U32* litFreq;
U32* offCodeFreq;
U32 matchLengthSum;
U32 litLengthSum;
U32 litSum;
U32 offCodeSum;
} seqStore_t;
seqStore_t ZSTD_copySeqStore(const ZSTD_CCtx* ctx);
#endif /* ZSTD_CCOMMON_H_MODULE */