val result = mutableMapOf<Int, String>()
  val target = Buffer()
  while (!exhausted()) {
    skipWhitespace()
    val sourceCodePoint = readHexadecimalUnsignedLong().toInt()
    skipWhitespace()
    if (select(optionsSemicolon) != 0) throw IOException("expected ';'")
    skipWhitespace()
    while (select(optionsSemicolon) == -1) {
      val targetCodePoint = readHexadecimalUnsignedLong().toInt()

        }

        else -> sourceCodePoint0
      }

    skipWhitespace()
    if (readByte() != ';'.code.toByte()) throw IOException("expected ';'")

    // "valid" or "mapped"
    skipWhitespace()
    val type = select(optionsType)

    when (type) {
      TYPE_DEVIATION, TYPE_MAPPED, TYPE_DISALLOWED_STD3_MAPPED -> {
        skipWhitespace()