) {
  var codePoint: Int
  var i = pos
  while (i < limit) {
    codePoint = encoded.codePointAt(i)
    if (codePoint == '%'.code && i + 2 < limit) {
      val d1 = encoded[i + 1].parseHexDigit()
      val d2 = encoded[i + 2].parseHexDigit()
      if (d1 != -1 && d2 != -1) {
        writeByte((d1 shl 4) + d2)
        i += 2
        i += Character.charCount(codePoint)
        continue
      }