X-Git-Url: http://vcs.maemo.org/git/?a=blobdiff_plain;f=lzma%2FC%2FCompress%2FLz%2FLzHash.h;fp=lzma%2FC%2FCompress%2FLz%2FLzHash.h;h=87c28365e91eb8f5e6751bceb2c383882b48c7f6;hb=1a2e54b98aaab3669eebd38facb83687c4ac7baf;hp=0000000000000000000000000000000000000000;hpb=0b9bdac28929054558b5d7f315403fe3399a1413;p=physicsfs

diff --git a/lzma/C/Compress/Lz/LzHash.h b/lzma/C/Compress/Lz/LzHash.h
new file mode 100644
index 0000000..87c2836
--- /dev/null
+++ b/lzma/C/Compress/Lz/LzHash.h
@@ -0,0 +1,53 @@
+/* LzHash.h */
+
+#ifndef __C_LZHASH_H
+#define __C_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 = g_CrcTable[cur[0]] ^ cur[1]; \
+  hash2Value = temp & (kHash2Size - 1); \
+  hashValue = (temp ^ ((UInt32)cur[2] << 8)) & p->hashMask; }
+
+#define HASH4_CALC { \
+  UInt32 temp = g_CrcTable[cur[0]] ^ cur[1]; \
+  hash2Value = temp & (kHash2Size - 1); \
+  hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+  hashValue = (temp ^ ((UInt32)cur[2] << 8) ^ (g_CrcTable[cur[3]] << 5)) & p->hashMask; }
+
+#define HASH5_CALC { \
+  UInt32 temp = g_CrcTable[cur[0]] ^ cur[1]; \
+  hash2Value = temp & (kHash2Size - 1); \
+  hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+  hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (g_CrcTable[cur[3]] << 5)); \
+  hashValue = (hash4Value ^ (g_CrcTable[cur[4]] << 3)) & p->hashMask; \
+  hash4Value &= (kHash4Size - 1); }
+
+/* #define HASH_ZIP_CALC hashValue = ((cur[0] | ((UInt32)cur[1] << 8)) ^ g_CrcTable[cur[2]]) & 0xFFFF; */
+#define HASH_ZIP_CALC hashValue = ((cur[2] | ((UInt32)cur[0] << 8)) ^ g_CrcTable[cur[1]]) & 0xFFFF;
+
+
+#define MT_HASH2_CALC \
+  hash2Value = (g_CrcTable[cur[0]] ^ cur[1]) & (kHash2Size - 1);
+
+#define MT_HASH3_CALC { \
+  UInt32 temp = g_CrcTable[cur[0]] ^ cur[1]; \
+  hash2Value = temp & (kHash2Size - 1); \
+  hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); }
+
+#define MT_HASH4_CALC { \
+  UInt32 temp = g_CrcTable[cur[0]] ^ cur[1]; \
+  hash2Value = temp & (kHash2Size - 1); \
+  hash3Value = (temp ^ ((UInt32)cur[2] << 8)) & (kHash3Size - 1); \
+  hash4Value = (temp ^ ((UInt32)cur[2] << 8) ^ (g_CrcTable[cur[3]] << 5)) & (kHash4Size - 1); }
+
+#endif