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49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Simple mmap tests
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#include <exiv2/exiv2.hpp>
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#include <iostream>
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using namespace Exiv2;
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int main(int argc, char* const argv[]) {
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try {
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Exiv2::XmpParser::initialize();
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::atexit(Exiv2::XmpParser::terminate);
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#ifdef EXV_ENABLE_BMFF
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Exiv2::enableBMFF();
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#endif
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if (argc != 2) {
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std::cout << "Usage: " << argv[0] << " file\n";
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return EXIT_FAILURE;
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}
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const char* path = argv[1];
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FileIo file(path);
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// Open the file in read mode
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if (file.open("rb") != 0) {
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throw Error(ErrorCode::kerFileOpenFailed, path, "rb", strError());
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}
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// Map it to memory
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const Exiv2::byte* pData = file.mmap();
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std::vector<byte> buf(file.size());
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// Read from the memory mapped region
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std::copy_n(pData, buf.size(), buf.begin());
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// Reopen file in write mode and write to it
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file.write(buf.data(), buf.size());
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// Read from the mapped region again
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std::copy_n(pData, buf.size(), buf.begin());
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file.close();
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return EXIT_SUCCESS;
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} catch (const Error& e) {
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std::cout << e << "\n";
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return EXIT_FAILURE;
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}
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}
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