System.Text.RegularExpressions.RegexParser.ScanHex C# (CSharp) Method

        internal char ScanHex(int c)
        {
            int i;
            int d;

            i = 0;

            if (CharsRight() >= c)
            {
                for (; c > 0 && ((d = HexDigit(MoveRightGetChar())) >= 0); c -= 1)
                {
                    i *= 0x10;
                    i += d;
                }
            }

            if (c > 0)
                throw MakeException(SR.TooFewHex);

            return (char)i;
        }