diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/LzmaCustomDecompressLib/Sdk/C/LzHash.h')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/LzmaCustomDecompressLib/Sdk/C/LzHash.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/LzmaCustomDecompressLib/Sdk/C/LzHash.h b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/LzmaCustomDecompressLib/Sdk/C/LzHash.h new file mode 100644 index 00000000..e7c94230 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/LzmaCustomDecompressLib/Sdk/C/LzHash.h @@ -0,0 +1,57 @@ +/* LzHash.h -- HASH functions for LZ algorithms +2015-04-12 : Igor Pavlov : Public domain */ + +#ifndef __LZ_HASH_H +#define __LZ_HASH_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 hv = cur[0] | ((UInt32)cur[1] << 8); + +#define HASH3_CALC { \ + UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ + h2 = temp & (kHash2Size - 1); \ + hv = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; } + +#define HASH4_CALC { \ + UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ + h2 = temp & (kHash2Size - 1); \ + temp ^= ((UInt32)cur[2] << 8); \ + h3 = temp & (kHash3Size - 1); \ + hv = (temp ^ (p->crc[cur[3]] << 5)) & p->hashMask; } + +#define HASH5_CALC { \ + UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ + h2 = temp & (kHash2Size - 1); \ + temp ^= ((UInt32)cur[2] << 8); \ + h3 = temp & (kHash3Size - 1); \ + temp ^= (p->crc[cur[3]] << 5); \ + h4 = temp & (kHash4Size - 1); \ + hv = (temp ^ (p->crc[cur[4]] << 3)) & p->hashMask; } + +/* #define HASH_ZIP_CALC hv = ((cur[0] | ((UInt32)cur[1] << 8)) ^ p->crc[cur[2]]) & 0xFFFF; */ +#define HASH_ZIP_CALC hv = ((cur[2] | ((UInt32)cur[0] << 8)) ^ p->crc[cur[1]]) & 0xFFFF; + + +#define MT_HASH2_CALC \ + h2 = (p->crc[cur[0]] ^ cur[1]) & (kHash2Size - 1); + +#define MT_HASH3_CALC { \ + UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ + h2 = temp & (kHash2Size - 1); \ + h3 = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); } + +#define MT_HASH4_CALC { \ + UInt32 temp = p->crc[cur[0]] ^ cur[1]; \ + h2 = temp & (kHash2Size - 1); \ + temp ^= ((UInt32)cur[2] << 8); \ + h3 = temp & (kHash3Size - 1); \ + h4 = (temp ^ (p->crc[cur[3]] << 5)) & (kHash4Size - 1); } + +#endif |