NPLMono.NPLLex.read_numeral C# (CSharp) Method

        public static void read_numeral(LexState LS, int comma, SemInfo seminfo)
        {
            int l = 0;
            checkbuffer(LS, l);
            if (comma > 0) save(LS, '.', ref l);
            while (Char.IsDigit((char)LS.current))
            {
                checkbuffer(LS, l);
                save_and_next(LS, ref l);
            }
            if (LS.current == '.')
            {
                save_and_next(LS, ref l);
                if (LS.current == '.')
                {
                    save_and_next(LS, ref l);
                    save(LS, '\0', ref l);
                    luaX_lexerror(LS,
                        "ambiguous syntax (decimal point x string concatenation)",
                        (int)RESERVED.TK_NUMBER);
                }
            }
            while (Char.IsDigit((char)LS.current))
            {
                checkbuffer(LS, l);
                save_and_next(LS, ref l);
            }
            if (LS.current == 'e' || LS.current == 'E')
            {
                save_and_next(LS, ref l);  /* read `E' */
                if (LS.current == '+' || LS.current == '-')
                    save_and_next(LS, ref l);  /* optional exponent sign */
                while (Char.IsDigit((char)LS.current))
                {
                    checkbuffer(LS, l);
                    save_and_next(LS, ref l);
                }
            }
            save(LS, '\0', ref l);
            try
            {
                seminfo.r = Convert.ToDouble(new string(LS.buff, 0, l - 1));
            }
            catch (Exception e)
            {
                luaX_lexerror(LS, "malformed number" + e.ToString(), (int)RESERVED.TK_NUMBER);
            }
        }