PrimeWorldEditor/Common/CHashFNV1A.cpp

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#include "CHashFNV1A.h"
const u64 CHashFNV1A::skFNVOffsetBasis32 = 0x811C9DC5;
const u64 CHashFNV1A::skFNVOffsetBasis64 = 0xCBF29CE484222325;
const u64 CHashFNV1A::skFNVPrime32 = 0x1000193;
const u64 CHashFNV1A::skFNVPrime64 = 0x100000001B3;
CHashFNV1A::CHashFNV1A()
{
Init32();
}
void CHashFNV1A::Init32()
{
mHashLength = e32Bit;
mHash = skFNVOffsetBasis32;
}
void CHashFNV1A::Init64()
{
mHashLength = e64Bit;
mHash = skFNVOffsetBasis64;
}
void CHashFNV1A::HashData(const void *pData, u32 Size)
{
const char *pCharData = (const char*) pData;
u64 FNVPrime = (mHashLength == e32Bit) ? skFNVPrime32 : skFNVPrime64;
for (u32 i = 0; i < Size; i++)
{
mHash ^= *pCharData;
mHash *= FNVPrime;
pCharData++;
}
}
u32 CHashFNV1A::GetHash32()
{
return (u32) mHash;
}
u64 CHashFNV1A::GetHash64()
{
return mHash;
}
// ************ CONVENIENCE FUNCTIONS ************
void CHashFNV1A::HashByte(const u8& v)
{
HashData(&v, 1);
}
void CHashFNV1A::HashShort(const u16& v)
{
HashData(&v, 2);
}
void CHashFNV1A::HashLong(const u32& v)
{
HashData(&v, 4);
}
void CHashFNV1A::HashFloat(const float& v)
{
HashData(&v, 4);
}
void CHashFNV1A::HashString(const TString& v)
{
HashData(v.Data(), v.Size());
}