binary_ofstream.cc

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#include "binary_ofstream.h"
 
#include <cstdio>
#include <iostream>
 
struct binary_ofstream_error {};
 
binary_ofstream::binary_ofstream(const char* name) : file_(nullptr) { init(name); }
 
binary_ofstream::binary_ofstream(const std::string& name) : file_(nullptr) { init(name.c_str()); }
 
void binary_ofstream::init(const char* name) {
  file_ = fopen(name, "wb");
  if (file_ == nullptr) {
    std::cout << "file " << name << " cannot be opened for writing" << std::endl;
    throw binary_ofstream_error();
  }
}
 
binary_ofstream::~binary_ofstream() { close(); }
void binary_ofstream::close() {
  if (file_ != nullptr)
    fclose(file_);
  file_ = nullptr;
}
 
binary_ofstream& binary_ofstream::operator<<(char n) {
  fputc(n, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(unsigned char n) {
  fputc(n, file_);
  return *this;
}
 
binary_ofstream& binary_ofstream::operator<<(short n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(unsigned short n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(int n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(unsigned int n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(long n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(unsigned long n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(float n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
binary_ofstream& binary_ofstream::operator<<(double n) {
  fwrite(&n, sizeof(n), 1, file_);
  return *this;
}
 
binary_ofstream& binary_ofstream::operator<<(bool n) { return operator<<(static_cast<char>(n)); }
 
binary_ofstream& binary_ofstream::operator<<(const std::string& s) {
  (*this)
      << (uint32_t)
             s.size();  // Use uint32 for backward compatibilty of binary files that were generated on 32-bit machines.
  fwrite(s.data(), 1, s.size(), file_);
  return *this;
}