// ***************************************************************** -*- C++ -*-

// exifvalue.cpp

// Sample program to print value of an exif key in an image

#include <exiv2/exiv2.hpp>

#include <iostream>

#include <iomanip>

#include <cassert>

#include <string>

int main(int argc, char* const argv[])

{

    if (argc != 3) {

        std::cerr << "Usage: " << argv[0] << " file key\n";

        return 1;

    }

    const char* file = argv[1];

    const char* key  = argv[2];

    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(file);

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

    image->readMetadata();

    Exiv2::ExifData &exifData = image->exifData();

    if ( exifData.empty()) {

		std::cerr << "no metadata found in file " << file << std::endl;

		exit(2);

	}

	try {

     	std::cout << exifData[key] << std::endl;

	} catch (Exiv2::AnyError& e) {

    	std::cerr << "Caught Exiv2 exception '" << e << "'" << std::endl;

    	exit(3);

	} catch ( ... ) {

		std::cerr << "Caught a cold!" << std::endl;

    	exit(4);

	}

    return 0;

}