Lidgren.Network.NetBigInteger.GetLowestSetBit C# (CSharp) Method

        public int GetLowestSetBit()
        {
            if (m_sign == 0)
                return -1;

            int w = m_magnitude.Length;

            while (--w > 0)
            {
                if (m_magnitude[w] != 0)
                    break;
            }

            int word = (int)m_magnitude[w];
            Debug.Assert(word != 0);

            int b = (word & 0x0000FFFF) == 0
                ? (word & 0x00FF0000) == 0
                    ? 7
                    : 15
                : (word & 0x000000FF) == 0
                    ? 23
                    : 31;

            while (b > 0)
            {
                if ((word << b) == int.MinValue)
                    break;

                b--;
            }

            return ((m_magnitude.Length - w) * 32 - (b + 1));
        }