avt.DynamicFlashRotator.Net.RegCore.Cryptography.BigInteger.shiftRight C# (CSharp) Method

        private static int shiftRight(uint[] buffer, int shiftVal)
        {
            int shiftAmount = 32;
            int invShift = 0;
            int bufLen = buffer.Length;

            while (bufLen > 1 && buffer[bufLen - 1] == 0)
                bufLen--;

            //Console.WriteLine("bufLen = " + bufLen + " buffer.Length = " + buffer.Length);

            for (int count = shiftVal; count > 0; ) {
                if (count < shiftAmount) {
                    shiftAmount = count;
                    invShift = 32 - shiftAmount;
                }

                //Console.WriteLine("shiftAmount = {0}", shiftAmount);

                ulong carry = 0;
                for (int i = bufLen - 1; i >= 0; i--) {
                    ulong val = ((ulong)buffer[i]) >> shiftAmount;
                    val |= carry;

                    carry = ((ulong)buffer[i]) << invShift;
                    buffer[i] = (uint)(val);
                }

                count -= shiftAmount;
            }

            while (bufLen > 1 && buffer[bufLen - 1] == 0)
                bufLen--;

            return bufLen;
        }