jSignature.Tools.Base30Converter.FromBase30 C# (CSharp) Method

        private int FromBase30(List<int> data)
        {
            int len = data.Count;
            if (len == 1)
            {
                return data[0];
            }
            else
            {
                data.Reverse();
                // now we know that we have at least 2 elems.
                double answer = data[0] + data[1] * bitness;
                for (int i = 2; i < len; i++)
                {
                    answer = answer + data[i] * Math.Pow(bitness, i);
                }
                return (int)answer;
            }
        }