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()
      target.writeUtf8CodePoint(targetCodePoint)
      skipWhitespace()
    }

      }
    }

    // "002F" or "0000..002C"
    val sourceCodePoint0 = readHexadecimalUnsignedLong()
    val sourceCodePoint1 =
      when (select(optionsDot)) {
        DELIMITER_DOT -> {
          if (readByte() != '.'.code.toByte()) throw IOException("expected '..'")
          readHexadecimalUnsignedLong()
        }

        else -> sourceCodePoint0
      }

    skipWhitespace()

      // Read the suffix of the previous chunk.
      if (bytesRemainingInChunk != NO_CHUNK_YET) {
        source.readUtf8LineStrict()
      }
      try {
        bytesRemainingInChunk = source.readHexadecimalUnsignedLong()
        val extensions = source.readUtf8LineStrict().trim()
        if (bytesRemainingInChunk < 0L || extensions.isNotEmpty() && !extensions.startsWith(";")) {
          throw ProtocolException(