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// SPDX-License-Identifier: GPL-2.0-or-later
// Simple mmap tests
#include <exiv2/exiv2.hpp>
#include <iostream>
using namespace Exiv2;
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;
}
const char* path = argv[1];
FileIo file(path);
// Open the file in read mode
if (file.open("rb") != 0) {
throw Error(ErrorCode::kerFileOpenFailed, path, "rb", strError());
}
// Map it to memory
const Exiv2::byte* pData = file.mmap();
std::vector<byte> buf(file.size());
// Read from the memory mapped region
std::copy_n(pData, buf.size(), buf.begin());
// Reopen file in write mode and write to it
file.write(buf.data(), buf.size());
// Read from the mapped region again
std::copy_n(pData, buf.size(), buf.begin());
file.close();
return EXIT_SUCCESS;
} catch (const Error& e) {
std::cout << e << "\n";
return EXIT_FAILURE;
}
}
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