diff options
Diffstat (limited to 'src/hash/buzhash.c')
| -rw-r--r-- | src/hash/buzhash.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/src/hash/buzhash.c b/src/hash/buzhash.c index 9e1b560..ec2705d 100644 --- a/src/hash/buzhash.c +++ b/src/hash/buzhash.c @@ -19,28 +19,20 @@ static uint8_t T[256] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14, 234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251, 252,253,254,255}; -uint8_t i_lr8(uint8_t y, uint8_t offset){ - return ( y << offset ) | ( y >> (8 - offset)); -} - -uint16_t i_lr16(uint16_t y, uint16_t offset){ - return ( y << offset ) | ( y >> (16 - offset)); -} - -uint8_t i_buzhash8(uint8_t* in, size_t len){ +uint8_t buzhash8(uint8_t* in, size_t len){ uint8_t hash = 0; for(int i = 0; i != len; i++){ - hash ^= i_lr8(T[(uint8_t)in[i]],len - (i + 1)); + hash ^= rotl8(T[(uint8_t)in[i]],len - (i + 1)); } return hash; } -uint16_t i_buzhash16(uint8_t* in, size_t len){ +uint16_t buzhash16(uint8_t* in, size_t len){ uint16_t hash = 0; for(int i = 0; i != len; i++){ - hash ^= i_lr16(T[(uint8_t)in[i]],len - (i + 1)); + hash ^= rotl16(T[(uint8_t)in[i]],len - (i + 1)); } return hash; @@ -72,7 +64,7 @@ int l_buzhash8(lua_State* L){ uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); char digest[3]; - uint8_t u = i_buzhash8(a, len); + uint8_t u = buzhash8(a, len); sprintf(digest,"%x",u); @@ -86,7 +78,7 @@ int l_buzhash16(lua_State* L){ uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); char digest[6]; - uint16_t u = i_buzhash16(a, len); + uint16_t u = buzhash16(a, len); sprintf(digest,"%04x",u); |