private void Body(byte[] data, int start, int length)
{
int remainder = length & 15;
int alignedLength = start + (length - remainder);
for (int i = start; i < alignedLength; i += 16)
{
uint k1 = data.ToUInt32(i),
k2 = data.ToUInt32(i + 4),
k3 = data.ToUInt32(i + 8),
k4 = data.ToUInt32(i + 12);
H1 ^= (k1 * C1).RotateLeft(15) * C2;
H1 = (H1.RotateLeft(19) + H2) * 5 + 0x561ccd1b;
H2 ^= (k2 * C2).RotateLeft(16) * C3;
H2 = (H2.RotateLeft(17) + H3) * 5 + 0x0bcaa747;
H3 ^= (k3 * C3).RotateLeft(17) * C4;
H3 = (H3.RotateLeft(15) + H4) * 5 + 0x96cd1c35;
H4 ^= (k4 * C4).RotateLeft(18) * C1;
H4 = (H4.RotateLeft(13) + H1) * 5 + 0x32ac3b17;
}
if (remainder > 0)
{
Tail(data, alignedLength, remainder);
}
}
private void Body(byte[] data, int start, int length)
{
if (length == 0)
{
return;
}
int remainder = length & 15;
int blocks = length / 16;
unsafe
{
fixed(byte *d = &data[start])
{
// grab a reference to blocks
uint *b = (uint *)d;
while (blocks-- > 0)
{
// K1 - consume first integer
H1 ^= (*b++ *C1).RotateLeft(15) * C2;
H1 = (H1.RotateLeft(19) + H2) * 5 + 0x561ccd1b;
// K2 - consume second integer
H2 ^= (*b++ *C2).RotateLeft(16) * C3;
H2 = (H2.RotateLeft(17) + H3) * 5 + 0x0bcaa747;
// K3 - consume third integer
H3 ^= (*b++ *C3).RotateLeft(17) * C4;
H3 = (H3.RotateLeft(15) + H4) * 5 + 0x96cd1c35;
// K4 - consume fourth integer
H4 ^= (*b++ *C4).RotateLeft(18) * C1;
H4 = (H4.RotateLeft(13) + H1) * 5 + 0x32ac3b17;
}
if (remainder > 0)
{
Tail(d + (length - remainder), remainder);
}
}
}
}
private void Body(ReadOnlySpan <byte> source)
{
if (source.Length == 0)
{
return;
}
var remainder = source.Length & 15;
var blocks = 4 * (source.Length / 16);
if (blocks > 0)
{
var uintSource = MemoryMarshal.Cast <byte, uint>(source);
var block = 0;
while (block < blocks)
{
var k1 = uintSource[block++];
var k2 = uintSource[block++];
var k3 = uintSource[block++];
var k4 = uintSource[block++];
H1 ^= (k1 * C1).RotateLeft(15) * C2;
H1 = ((H1.RotateLeft(19) + H2) * 5) + 0x561ccd1b;
H2 ^= (k2 * C2).RotateLeft(16) * C3;
H2 = ((H2.RotateLeft(17) + H3) * 5) + 0x0bcaa747;
H3 ^= (k3 * C3).RotateLeft(17) * C4;
H3 = ((H3.RotateLeft(15) + H4) * 5) + 0x96cd1c35;
H4 ^= (k4 * C4).RotateLeft(18) * C1;
H4 = ((H4.RotateLeft(13) + H1) * 5) + 0x32ac3b17;
}
}
if (remainder > 0)
{
Tail(source.Slice(4 * blocks));
}
}