// ***************************************************************** -*- C++ -*-
// exifprint.cpp
// Sample program to print the Exif metadata of an image

#include <exiv2/exiv2.hpp>

#include <iostream>
#include <iomanip>
#include <cassert>

#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 ]") << std::endl;
        return 1;
    }

    if ( _tstrcmp(file,_t("--version")) == 0 ) {
    	exv_grep_keys_t keys;
    	Exiv2::dumpLibraryInfo(std::cout,keys);
    	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;
}