/*

 * Fuzzing of boost property tree parsers.

 * by Paul Dreik 20180818

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <boost/property_tree/xml_parser.hpp>

#include <sstream>

int

readXml(const char* Data, size_t Size)

{

  namespace pt = boost::property_tree;

  if (Size < 1) {

    // no data to use for flags - skip.

    return 0;

  }

  std::stringstream ss;

  const auto firstbyte = Data[0];

  ss.write(Data + 1, Size - 1);

  pt::ptree tree;

  try {

    // set the parse flags based on the first byte

    int flags = 0;

    if (firstbyte & 0x1) {

      flags |= pt::xml_parser::no_concat_text;

    }

    if (firstbyte & 0x2) {

      flags |= pt::xml_parser::no_comments;

    }

    if (firstbyte & 0x4) {

      flags |= pt::xml_parser::trim_whitespace;

    }

    pt::read_xml(ss, tree, flags);

    return tree.size() ? 1 : 0;

  } catch (...) {

    return 0;

  }

}

extern "C" int

LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size)

{

  readXml(reinterpret_cast<const char*>(Data), Size);

  return 0;

}