read equivalent for filebuf?

Question

typedef struct {
  char c[20];
  int i;
} header;

void foo(std::string s) {
  std::ifstream ifs(s.c_str(), std::ios_base::binary | std::ios_base::in);
  if (ifs) {
             


        

Answer 1

Just use basic_istream<>::read() to read raw, unformatted byte data:

void foo(std::string s) {
  std::ifstream ifs(s.c_str(), std::ios_base::binary | std::ios_base::in);
  if (ifs) {
    char buffer[20];
    if (!ifs.read(buffer, 20)) {
      // Handle error
    }
  }
}