forked from blender/blender
Brecht Van Lommel
7a395e2e7f
The last good commit wasf57e4c5b98. After this one more fix was committed, this one is preserved as well:67bd678887.
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
/* LzHash.h -- HASH functions for LZ algorithms
|
|
2008-10-04 : Igor Pavlov : Public domain */
|
|
|
|
#ifndef __LZHASH_H
|
|
#define __LZHASH_H
|
|
|
|
#define kHash2Size (1 << 10)
|
|
#define kHash3Size (1 << 16)
|
|
#define kHash4Size (1 << 20)
|
|
|
|
#define kFix3HashSize (kHash2Size)
|
|
#define kFix4HashSize (kHash2Size + kHash3Size)
|
|
#define kFix5HashSize (kHash2Size + kHash3Size + kHash4Size)
|
|
|
|
#define HASH2_CALC hashValue = cur[0] | ((UInt32)cur[1] << 8);
|
|
|
|
#define HASH3_CALC { \
|
|
UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
|
|
hash2Value = temp & (kHash2Size - 1); \
|
|
hashValue = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; }
|
|
|
|
#define HASH4_CALC { \
|
|
UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
|
|
hash2Value = temp & (kHash2Size - 1); \
|
|
hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
|
|
hashValue = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & p->hashMask; }
|
|
|
|
#define HASH5_CALC { \
|
|
UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
|
|
hash2Value = temp & (kHash2Size - 1); \
|
|
hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
|
|
hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)); \
|
|
hashValue = (hash4Value ^ (p->crc[cur[4]] << 3)) & p->hashMask; \
|
|
hash4Value &= (kHash4Size - 1); }
|
|
|
|
/* #define HASH_ZIP_CALC hashValue = ((cur[0] | ((UInt32)cur[1] << 8)) ^ p->crc[cur[2]]) & 0xFFFF; */
|
|
#define HASH_ZIP_CALC hashValue = ((cur[2] | ((UInt32)cur[0] << 8)) ^ p->crc[cur[1]]) & 0xFFFF;
|
|
|
|
|
|
#define MT_HASH2_CALC \
|
|
hash2Value = (p->crc[cur[0]] ^ cur[1]) & (kHash2Size - 1);
|
|
|
|
#define MT_HASH3_CALC { \
|
|
UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
|
|
hash2Value = temp & (kHash2Size - 1); \
|
|
hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); }
|
|
|
|
#define MT_HASH4_CALC { \
|
|
UInt32 temp = p->crc[cur[0]] ^ cur[1]; \
|
|
hash2Value = temp & (kHash2Size - 1); \
|
|
hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
|
|
hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & (kHash4Size - 1); }
|
|
|
|
#endif
|