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

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

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

            for (int count = shiftVal; count > 0; ) {
                if (count < shiftAmount)
                    shiftAmount = count;

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

                ulong carry = 0;
                for (int i = 0; i < bufLen; i++) {
                    ulong val = ((ulong)buffer[i]) << shiftAmount;
                    val |= carry;

                    buffer[i] = (uint)(val & 0xFFFFFFFF);
                    carry = val >> 32;
                }

                if (carry != 0) {
                    if (bufLen + 1 <= buffer.Length) {
                        buffer[bufLen] = (uint)carry;
                        bufLen++;
                    }
                }
                count -= shiftAmount;
            }
            return bufLen;
        }