#include <exiv2/exiv2.hpp>

#include <cassert>

#include <iomanip>

#include <iostream>

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

  // Invalid files generate a lot of warnings, so switch off logging.

  Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);

  Exiv2::XmpParser::initialize();

  ::atexit(Exiv2::XmpParser::terminate);

  try {

    Exiv2::DataBuf data_copy(data, size);

    Exiv2::Image::UniquePtr image = Exiv2::ImageFactory::open(data_copy.c_data(), size);

    assert(image.get() != 0);

    image->readMetadata();

    for (auto& md : image->exifData()) {

      if (md.tagName().substr(0, 2) != "0x") {

        md.print();

        md.print(&image->exifData());

      }

    }

    for (auto& md : image->iptcData()) {

      if (md.tagName().substr(0, 2) != "0x") {

        md.print();

        md.print(&image->exifData());

      }

    }

    for (auto& md : image->xmpData()) {

      if (md.tagName().substr(0, 2) != "0x") {

        md.print();

        md.print(&image->exifData());

      }

    }

    // Print to a std::ostringstream so that the fuzzer doesn't

    // produce lots of garbage on stdout.

    std::ostringstream buffer;

    image->printStructure(buffer, Exiv2::kpsNone);

    image->printStructure(buffer, Exiv2::kpsBasic);

    image->printStructure(buffer, Exiv2::kpsXMP);

    image->printStructure(buffer, Exiv2::kpsRecursive);

    image->printStructure(buffer, Exiv2::kpsIccProfile);

    image->printStructure(buffer, Exiv2::kpsIptcErase);

    image->writeMetadata();

  } catch (...) {

    // Exiv2 throws an exception if the metadata is invalid.

  }

  return 0;

}