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// ***************************************************************** -*- C++ -*-
// mmap-test.cpp, $Rev: 1967 $
// Simple mmap tests
#include <exiv2/basicio.hpp>
#include <exiv2/error.hpp>
#include <exiv2/futils.hpp>
#include <iostream>
#include <cstring>
using namespace Exiv2;
int main(int argc, char* const argv[])
try {
if (argc != 2) {
std::cout << "Usage: " << argv[0] << " file\n";
return 1;
}
const char* path = argv[1];
FileIo file(path);
// Open the file in read mode
if (file.open("rb") != 0) {
throw Error(10, path, "rb", strError());
}
// Map it to memory
const Exiv2::byte* pData = file.mmap();
long size = file.size();
DataBuf buf(size);
// Read from the memory mapped region
memcpy(buf.pData_, pData, buf.size_);
// Reopen file in write mode and write to it
file.write(buf.pData_, buf.size_);
// Read from the mapped region again
memcpy(buf.pData_, pData, buf.size_);
file.close();
return 0;
}
catch (const AnyError& e) {
std::cout << e << "\n";
}
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