private static void PostProcess(ref UInt32 h, UInt32[] initValues, ulong dataCount, byte[] remainder) { if (dataCount >= 16) { h = initValues[0].RotateLeft(1) + initValues[1].RotateLeft(7) + initValues[2].RotateLeft(12) + initValues[3].RotateLeft(18); } h += (UInt32)dataCount; if (remainder != null) { // In 4-byte chunks, process all process all full chunks for (int x = 0; x < remainder.Length / 4; ++x) { h += BitConverter.ToUInt32(remainder, x * 4) * _primes32[2]; h = h.RotateLeft(17) * _primes32[3]; } // Process last 4 bytes in 1-byte chunks (only runs if data.Length % 4 != 0) for (int x = remainder.Length - (remainder.Length % 4); x < remainder.Length; ++x) { h += (UInt32)remainder[x] * _primes32[4]; h = h.RotateLeft(11) * _primes32[0]; } } h ^= h >> 15; h *= _primes32[1]; h ^= h >> 13; h *= _primes32[2]; h ^= h >> 16; }
//______________________________________________________________________ private void II(ref UInt32 a, UInt32 b, UInt32 c, UInt32 d, UInt32 x, SS s, UInt32 ac ) { unchecked { #if !XX_inOneInstruction a += I(b, c, d) + x + ac; a = a.RotateLeft((int)s); a += b; #else a = (a += I(b, c, d) + x + ac).RotateLeft((int)s) + b; #endif } }
public void RotationLeft(UInt32 original, Int32 amount, UInt32 expected) { UInt32 rotated = original.RotateLeft(amount); Assert.Equal(expected, rotated); }