DELIMITER_NEWLINE -> {
        continue
      }

      DELIMITER_DOT, DELIMITER_SPACE, DELIMITER_SEMICOLON -> {
        throw IOException("unexpected delimiter")
      }
    }

    // "002F" or "0000..002C"
    val sourceCodePoint0 = readHexadecimalUnsignedLong()
    val sourceCodePoint1 =
      when (select(optionsDot)) {
        DELIMITER_DOT -> {