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

// exifprint.cpp

// Sample program to print the Exif metadata of an image

#include <exiv2/exiv2.hpp>

#include <iostream>

#include <iomanip>

#include <cassert>

// https://github.com/Exiv2/exiv2/issues/468

#if defined(EXV_UNICODE_PATH) && defined(__MINGW__)

#undef  EXV_UNICODE_PATH

#endif

#ifdef  EXV_UNICODE_PATH

#define _tchar      wchar_t

#define _tstrcmp    wcscmp

#define _t(s)       L##s

#define _tcout      wcout

#define _tmain      wmain

#else

#define _tchar      char

#define _tstrcmp    strcmp

#define _t(s)       s

#define _tcout      cout

#define _tmain      main

#endif

int _tmain(int argc, _tchar* const argv[])

try {

    const _tchar* prog = argv[0];

    const _tchar* file = argv[1];

    if (argc != 2) {

        std::_tcout << _t("Usage: ") << prog << _t(" [ file | --version || --version-test ]") << std::endl;

        return 1;

    }

    if ( _tstrcmp(file,_t("--version")) == 0 ) {

        exv_grep_keys_t keys;

        Exiv2::dumpLibraryInfo(std::cout,keys);

        return 0;

    } else if ( _tstrcmp(file,_t("--version-test")) == 0 ) {

        // verifies/test macro EXIV2_TEST_VERSION

        // described in include/exiv2/version.hpp

        std::cout << "EXV_PACKAGE_VERSION             " << EXV_PACKAGE_VERSION             << std::endl

                  << "Exiv2::version()                " << Exiv2::version()                << std::endl

                  << "strlen(Exiv2::version())        " << ::strlen(Exiv2::version())      << std::endl

                  << "Exiv2::versionNumber()          " << Exiv2::versionNumber()          << std::endl

                  << "Exiv2::versionString()          " << Exiv2::versionString()          << std::endl

                  << "Exiv2::versionNumberHexString() " << Exiv2::versionNumberHexString() << std::endl

                  ;

        // Test the Exiv2 version available at runtime but compile the if-clause only if

        // the compile-time version is at least 0.15. Earlier versions didn't have a

        // testVersion() function:

        #if EXIV2_TEST_VERSION(0,15,0)

            if (Exiv2::testVersion(0,13,0)) {

              std::cout << "Available Exiv2 version is equal to or greater than 0.13\n";

            } else {

              std::cout << "Installed Exiv2 version is less than 0.13\n";

            }

        #else

              std::cout << "Compile-time Exiv2 version doesn't have Exiv2::testVersion()\n";

        #endif

        return 0;

    }

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

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

    image->readMetadata();

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

    if (exifData.empty()) {

        std::string error("No Exif data found in file");

        throw Exiv2::Error(Exiv2::kerErrorMessage, error);

    }

    Exiv2::ExifData::const_iterator end = exifData.end();

    for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {

        const char* tn = i->typeName();

        std::cout << std::setw(44) << std::setfill(' ') << std::left

                  << i->key() << " "

                  << "0x" << std::setw(4) << std::setfill('0') << std::right

                  << std::hex << i->tag() << " "

                  << std::setw(9) << std::setfill(' ') << std::left

                  << (tn ? tn : "Unknown") << " "

                  << std::dec << std::setw(3)

                  << std::setfill(' ') << std::right

                  << i->count() << "  "

                  << std::dec << i->value()

                  << "\n";

    }

    return 0;

}

//catch (std::exception& e) {

//catch (Exiv2::AnyError& e) {

catch (Exiv2::Error& e) {

    std::cout << "Caught Exiv2 exception '" << e.what() << "'\n";

    return -1;

}