Method parse

src/svg/xml/XMLParser.cpp:124–169

XMLParser::~XMLParser() = default;

bool XMLParser::parse(Stream& stream) {
  ParsingContext parsingContext(this);
  if (!parsingContext._XMLParser) {
    LOGE("could not create XML parser\n");
    return false;
  }

  // Avoid calls to rand_s if this is not set. This seed helps prevent DOS
  // with a known hash sequence so an address is sufficient. The provided
  // seed should not be zero as that results in a call to rand_s.
  auto seed = static_cast<unsigned long>(reinterpret_cast<size_t>(HASH_SEED) & 0xFFFFFFFF);
  XML_SetHashSalt(parsingContext._XMLParser, seed ? seed : 1);

  XML_SetUserData(parsingContext._XMLParser, &parsingContext);
  XML_SetElementHandler(parsingContext._XMLParser, start_element_handler, end_element_handler);
  XML_SetCharacterDataHandler(parsingContext._XMLParser, text_handler);

  // Disable entity processing, to inhibit internal entity expansion. See expat CVE-2013-0340.
  XML_SetEntityDeclHandler(parsingContext._XMLParser, entity_decl_handler);

  XML_Status status = XML_STATUS_OK;
  if (stream.getMemoryBase() && stream.size() != 0) {
    const char* base = reinterpret_cast<const char*>(stream.getMemoryBase());
    status = XML_Parse(parsingContext._XMLParser, base, static_cast<int>(stream.size()), true);
  } else {
    static constexpr int BUFFER_SIZE = 4096;
    bool done = false;
    size_t length = stream.size();
    size_t currentPos = 0;
    do {
      void* buffer = XML_GetBuffer(parsingContext._XMLParser, BUFFER_SIZE);
      if (!buffer) {
        return false;
      }

      size_t readLength = stream.read(buffer, BUFFER_SIZE);
      currentPos += readLength;
      done = currentPos >= length;
      status = XML_ParseBuffer(parsingContext._XMLParser, static_cast<int>(readLength), done);
      if (XML_STATUS_ERROR == status) {
        break;
      }
    } while (!done);
  }
  return XML_STATUS_ERROR != status;
}

bool XMLParser::startElement(const std::string& element) {
  return this->onStartElement(element);