public static void CastBufferToSpan()
{
var buffer = new Buffer16();
Span <ulong> ulongSpan = buffer.AsSpan <ulong>();
Assert.Equal(2, ulongSpan.Length);
Assert.True(Unsafe.AreSame(ref Unsafe.As <Buffer16, ulong>(ref buffer), ref ulongSpan[0]));
}
public int ReadBits(int bitCount)
{
Debug.Assert(bitCount < 32);
if (bitCount == 0)
{
return(0);
}
int mask = (1 << bitCount) - 1;
int value = _data.As <int>() & mask;
Span <ulong> span = _data.AsSpan <ulong>();
ulong carry = span[1] << (64 - bitCount);
span[0] = (span[0] >> bitCount) | carry;
span[1] >>= bitCount;
BitsLeft -= bitCount;
return(value);
}