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minor code refactor in HUF module

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This commit is contained in:
Yann Collet 2017-03-05 21:07:20 -08:00
parent 5d801278dc
commit 1f2c95c5f3
3 changed files with 11 additions and 20 deletions
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14
lib/common/entropy_common.c
View File

@ -43,25 +43,15 @@
#include "huf.h"
/*-****************************************
* Version
******************************************/
/*=== Version ===*/
unsigned FSE_versionNumber(void) { return FSE_VERSION_NUMBER; }
/*-****************************************
* FSE Error Management
******************************************/
/*=== Error Management ===*/
unsigned FSE_isError(size_t code) { return ERR_isError(code); }
const char* FSE_getErrorName(size_t code) { return ERR_getErrorName(code); }
/* **************************************************************
* HUF Error Management
****************************************************************/
unsigned HUF_isError(size_t code) { return ERR_isError(code); }
const char* HUF_getErrorName(size_t code) { return ERR_getErrorName(code); }

7
lib/common/huf.h
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@ -102,10 +102,11 @@ size_t HUF_compress4X_wksp (void* dst, size_t dstSize, const void* src, size_t s
/* *** Constants *** */
#define HUF_TABLELOG_ABSOLUTEMAX 15 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
#define HUF_TABLELOG_MAX 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
#define HUF_TABLELOG_MAX 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
#define HUF_TABLELOG_DEFAULT 11 /* tableLog by default, when not specified */
#define HUF_SYMBOLVALUE_MAX 255
#define HUF_SYMBOLVALUE_MAX 255
#define HUF_TABLELOG_ABSOLUTEMAX 15 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
#if (HUF_TABLELOG_MAX > HUF_TABLELOG_ABSOLUTEMAX)
# error "HUF_TABLELOG_MAX is too large !"
#endif

10
lib/decompress/huf_decompress.c
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@ -108,10 +108,10 @@ size_t HUF_readDTableX2 (HUF_DTable* DTable, const void* src, size_t srcSize)
memcpy(DTable, &dtd, sizeof(dtd));
}
/* Prepare ranks */
/* Calculate starting value for each rank */
{ U32 n, nextRankStart = 0;
for (n=1; n<tableLog+1; n++) {
U32 current = nextRankStart;
U32 const current = nextRankStart;
nextRankStart += (rankVal[n] << (n-1));
rankVal[n] = current;
} }
@ -121,11 +121,11 @@ size_t HUF_readDTableX2 (HUF_DTable* DTable, const void* src, size_t srcSize)
for (n=0; n<nbSymbols; n++) {
U32 const w = huffWeight[n];
U32 const length = (1 << w) >> 1;
U32 i;
U32 u;
HUF_DEltX2 D;
D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w);
for (i = rankVal[w]; i < rankVal[w] + length; i++)
dt[i] = D;
for (u = rankVal[w]; u < rankVal[w] + length; u++)
dt[u] = D;
rankVal[w] += length;
} }