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

        private int calcBitLength(
			int indx,
			int[] mag)
        {
            for (; ; )
            {
                if (indx >= mag.Length)
                    return 0;

                if (mag[indx] != 0)
                    break;

                ++indx;
            }

            // bit length for everything after the first int
            int bitLength = 32 * ((mag.Length - indx) - 1);

            // and determine bitlength of first int
            int firstMag = mag[indx];
            bitLength += BitLen(firstMag);

            // Check for negative powers of two
            if (m_sign < 0 && ((firstMag & -firstMag) == firstMag))
            {
                do
                {
                    if (++indx >= mag.Length)
                    {
                        --bitLength;
                        break;
                    }
                }
                while (mag[indx] == 0);
            }

            return bitLength;
        }