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iptcprint.cpp

Demonstrates Exiv2 library APIs to print Iptc data

// 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;
}
Exiv2::Error
Simple error class used for exceptions. An output operator is provided to print errors to a stream.
Definition error.hpp:236
Exiv2::ImageFactory::open
static Image::UniquePtr open(const std::string &path, bool useCurl=true)
Create an Image subclass of the appropriate type by reading the specified file. Image type is derived...
Definition image.cpp:820
Exiv2::IptcData
A container for IPTC data. This is a top-level class of the Exiv2 library.
Definition iptc.hpp:153
Exiv2::IptcData::begin
iterator begin()
Begin of the metadata.
Definition iptc.hpp:206
Exiv2::IptcData::empty
bool empty() const
Return true if there is no IPTC metadata.
Definition iptc.hpp:246
Exiv2::IptcData::end
iterator end()
End of the metadata.
Definition iptc.hpp:210
Exiv2::XmpParser::initialize
static bool initialize(XmpParser::XmpLockFct xmpLockFct=nullptr, void *pLockData=nullptr)
Initialize the XMP Toolkit.
Definition xmp.cpp:568
Exiv2::XmpParser::terminate
static void terminate()
Terminate the XMP Toolkit and unregister custom namespaces.
Definition xmp.cpp:623