iptcprint.cpp

Sample program to print the IPTC metadata of an image

// SPDX-License-Identifier: GPL-2.0-or-later
// Sample program to print the IPTC metadata of an image
 
#include <exiv2/exiv2.hpp>
 
#include <iostream>
 
int main(int argc, char* const argv[]) try {
  Exiv2::XmpParser::initialize();
  ::atexit(Exiv2::XmpParser::terminate);
 
  if (argc != 2) {
    std::cout << "Usage: " << argv[0] << " file\n";
    return EXIT_FAILURE;
  }
 
  auto image = Exiv2::ImageFactory::open(argv[1]);
  image->readMetadata();
 
  Exiv2::IptcData& iptcData = image->iptcData();
  if (iptcData.empty()) {
    std::string error(argv[1]);
    error += ": No IPTC data found in the file";
    throw Exiv2::Error(Exiv2::ErrorCode::kerErrorMessage, error);
  }
 
  auto end = iptcData.end();
  for (auto md = iptcData.begin(); md != end; ++md) {
    std::cout << std::setw(44) << std::setfill(' ') << std::left << md->key() << " "
              << "0x" << std::setw(4) << std::setfill('0') << std::right << std::hex << md->tag() << " " << std::setw(9)
              << std::setfill(' ') << std::left << md->typeName() << " " << std::dec << std::setw(3)
              << std::setfill(' ') << std::right << md->count() << "  " << std::dec << md->value() << std::endl;
  }
 
  return EXIT_SUCCESS;
} catch (Exiv2::Error& e) {
  std::cout << "Caught Exiv2 exception '" << e << "'\n";
  return EXIT_FAILURE;
} catch (const std::exception& e) {
  std::cout << "Caught exception: '" << e.what() << "'\n";
  return EXIT_FAILURE;
}