protected override byte[] HashFinal()
{
uint len = (uint)Length;
// pipelining friendly algorithm
H1 ^= len; H2 ^= len; H3 ^= len; H4 ^= len;
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
H1 = H1.FMix();
H2 = H2.FMix();
H3 = H3.FMix();
H4 = H4.FMix();
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
var result = new byte[16];
unsafe
{
fixed(byte *h = result)
{
var r = (uint *)h;
r[0] = H1;
r[1] = H2;
r[2] = H3;
r[3] = H4;
}
}
return(result);
}
protected override byte[] HashFinal()
{
uint len = (uint)Length;
H1 ^= len; H2 ^= len; H3 ^= len; H4 ^= len;
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
H1 = H1.FMix();
H2 = H2.FMix();
H3 = H3.FMix();
H4 = H4.FMix();
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
var result = new byte[16];
Array.Copy(BitConverter.GetBytes(H1), 0, result, 0, 4);
Array.Copy(BitConverter.GetBytes(H2), 0, result, 4, 4);
Array.Copy(BitConverter.GetBytes(H3), 0, result, 8, 4);
Array.Copy(BitConverter.GetBytes(H4), 0, result, 12, 4);
return(result);
}
protected override bool TryHashFinal(Span <byte> destination, out int bytesWritten)
{
if (destination.Length < 16)
{
bytesWritten = 0;
return(false);
}
var len = (uint)Length;
// pipelining friendly algorithm
H1 ^= len; H2 ^= len; H3 ^= len; H4 ^= len;
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
H1 = H1.FMix();
H2 = H2.FMix();
H3 = H3.FMix();
H4 = H4.FMix();
H1 += (H2 + H3 + H4);
H2 += H1; H3 += H1; H4 += H1;
var uintDestination = MemoryMarshal.Cast <byte, uint>(destination);
uintDestination[0] = H1;
uintDestination[1] = H2;
uintDestination[2] = H3;
uintDestination[3] = H4;
bytesWritten = 16;
return(true);
}
public override unsafe Memory <byte> FinalizeHash()
{
uint len = (uint)Length;
// pipelining friendly algorithm
H1 ^= len;
H2 ^= len;
H3 ^= len;
H4 ^= len;
H1 += (H2 + H3 + H4);
H2 += H1;
H3 += H1;
H4 += H1;
H1 = H1.FMix();
H2 = H2.FMix();
H3 = H3.FMix();
H4 = H4.FMix();
H1 += (H2 + H3 + H4);
H2 += H1;
H3 += H1;
H4 += H1;
var result = new Memory <byte>(new byte[16]);
using var hMemory = result.Pin();
var r = (uint *)hMemory.Pointer;
r[0] = H1;
r[1] = H2;
r[2] = H3;
r[3] = H4;
return(result);
}