} else {
          quotient = divide(x, radix);
        }
        long rem = x - quotient * radix;
        buf[--i] = Character.forDigit((int) rem, radix);
        x = quotient;
        // Simple modulo/division approach
        while (x > 0) {
          buf[--i] = Character.forDigit((int) (x % radix), radix);
          x /= radix;
        }
      }
      // Generate string

     * @param i
     *            the number to convert
     */
    public static void appendHex(final StringBuilder buf, final byte i) {
        buf.append(Character.forDigit((i & 0xf0) >> 4, 16));
        buf.append(Character.forDigit(i & 0x0f, 16));
    }

    /**
     * Appends the hexadecimal string representation of a number to the given StringBuilder.
     *
     * @param buf