third_party/lzma_sdk/LzHash.h - Issue 658573004: Updating to new OTS repo from https://github.com/khaledhosny/ots.git

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Side by Side Diff: third_party/lzma_sdk/LzHash.h

Issue 658573004: Updating to new OTS repo from https://github.com/khaledhosny/ots.git (Closed) Base URL: https://chromium.googlesource.com/external/ots@master

Patch Set: Adding Colored Emoji changes from external/git repo Created 6 years, 2 months ago

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1 /* LzHash.h -- HASH functions for LZ algorithms

2 2009-02-07 : Igor Pavlov : Public domain

3 in the public domain */

4

5 #ifndef __LZ_HASH_H

6 #define __LZ_HASH_H

7

8 #define kHash2Size (1 << 10)

9 #define kHash3Size (1 << 16)

10 #define kHash4Size (1 << 20)

11

12 #define kFix3HashSize (kHash2Size)

13 #define kFix4HashSize (kHash2Size + kHash3Size)

14 #define kFix5HashSize (kHash2Size + kHash3Size + kHash4Size)

15

16 #define HASH2_CALC hashValue = cur[0] \| ((UInt32)cur[1] << 8);

17

18 #define HASH3_CALC { \

19 UInt32 temp = p->crc[cur[0]] ^ cur[1]; \

20 hash2Value = temp & (kHash2Size - 1); \

21 hashValue = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; }

22

23 #define HASH4_CALC { \

24 UInt32 temp = p->crc[cur[0]] ^ cur[1]; \

25 hash2Value = temp & (kHash2Size - 1); \

26 hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \

27 hashValue = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & p->hashMa sk; }

28

29 #define HASH5_CALC { \

30 UInt32 temp = p->crc[cur[0]] ^ cur[1]; \

31 hash2Value = temp & (kHash2Size - 1); \

32 hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \

33 hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)); \

34 hashValue = (hash4Value ^ (p->crc[cur[4]] << 3)) & p->hashMask; \

35 hash4Value &= (kHash4Size - 1); }

36

37 /* #define HASH_ZIP_CALC hashValue = ((cur[0] \| ((UInt32)cur[1] << 8)) ^ p->crc[ cur[2]]) & 0xFFFF; */

38 #define HASH_ZIP_CALC hashValue = ((cur[2] \| ((UInt32)cur[0] << 8)) ^ p->crc[cur [1]]) & 0xFFFF;

39

40

41 #define MT_HASH2_CALC \

42 hash2Value = (p->crc[cur[0]] ^ cur[1]) & (kHash2Size - 1);

43

44 #define MT_HASH3_CALC { \

45 UInt32 temp = p->crc[cur[0]] ^ cur[1]; \

46 hash2Value = temp & (kHash2Size - 1); \

47 hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); }

48

49 #define MT_HASH4_CALC { \

50 UInt32 temp = p->crc[cur[0]] ^ cur[1]; \

51 hash2Value = temp & (kHash2Size - 1); \

52 hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \

53 hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (p->crc[cur[3]] << 5)) & (kHash4S ize - 1); }

54

55 #endif

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