bigloo.foreign.parselong C# (CSharp) Method

        public static long parselong( byte[] buf, int pos, int bout, int radix )
        {
            long result = 0;
            bool neg = false;
            byte cn;

            if (buf[pos] == (byte) '-')
            {
               ++pos;
               neg= true;
            }
            if (buf[pos] == (byte) '+')
            {
               ++pos;
               neg= false;
            }

            while (pos < bout)
            {
               cn= buf[pos++];
               if  (((byte)'0' <= cn) && (cn <= (byte)'9'))
              result= result * radix + (cn - (byte) '0');
               else if (cn <= (byte)'Z')
              result= result * radix + 10 + (cn - (byte) 'A');
               else
              result= result * radix + 10 + (cn - (byte) 'a');
            }

            return (neg ? -result : result);
        }