AForge.Math.FourierTransform.ReorderData C# (CSharp) Method

        private static void ReorderData(Complex[] data)
        {
            int len = data.Length;

            // check data length
            if ((len < minLength) || (len > maxLength) || (!Tools.IsPowerOf2(len)))
                throw new ArgumentException("Incorrect data length.");

            int[] rBits = GetReversedBits(Tools.Log2(len));

            for (int i = 0; i < len; i++)
            {
                int s = rBits[i];

                if (s > i)
                {
                    Complex t = data[i];
                    data[i] = data[s];
                    data[s] = t;
                }
            }
        }