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

        private static int[] ShiftRightInPlace(
			int start,
			int[] mag,
			int n)
        {
            int nInts = (int)((uint)n >> 5) + start;
            int nBits = n & 0x1f;
            int magEnd = mag.Length - 1;

            if (nInts != start)
            {
                int delta = (nInts - start);

                for (int i = magEnd; i >= nInts; i--)
                {
                    mag[i] = mag[i - delta];
                }
                for (int i = nInts - 1; i >= start; i--)
                {
                    mag[i] = 0;
                }
            }

            if (nBits != 0)
            {
                int nBits2 = 32 - nBits;
                int m = mag[magEnd];

                for (int i = magEnd; i > nInts; --i)
                {
                    int next = mag[i - 1];

                    mag[i] = (int)((uint)m >> nBits) | (next << nBits2);
                    m = next;
                }

                mag[nInts] = (int)((uint)mag[nInts] >> nBits);
            }

            return mag;
        }