#include#include #include using namespace boost::interprocess; int main(int argc, char** argv) { // Create a file mapping object for file "file.bin". file_mapping mapping("file.bin", read_only); // Create a mapped region object to map the file into memory. mapped_region region(mapping, read_only); // Get the address of the mapped region. void* addr = region.get_address(); // Get the size of the mapped region. std::size_t size = region.get_size(); // Create a memory buffer object to hold the mapped data. boost::interprocess::basic_bufferstream buffer((char*)addr, size); // Read data from the memory buffer. char data[1024]; buffer.read(data, sizeof(data)); // Print the data that was read. std::cout << data << std::endl; return 0; }
#includeIn this example, we use the standard C++ library to read data from a file into a string object. The data is then printed to the console. The package library for the MemoryBuffer read function will depend on which library it is being used from. As mentioned before, it can be found in libraries such as Boost or the standard C++ library.#include int main() { // Open a file for reading. std::ifstream infile("file.txt"); // Read data from the file into a memory buffer. std::string data((std::istreambuf_iterator (infile)), std::istreambuf_iterator ()); // Print the data that was read. std::cout << data << std::endl; return 0; }