Function error

src/http.cpp:77–88

}

static int error(std::string& errors, const char* msg, const char* x = nullptr, const char* y = nullptr, int z = 0) {
  static const size_t buffer_size = 512;
  char buffer[buffer_size] = {};
  snprintf(buffer, buffer_size, msg, x, y, z);
  if (errno) {
    perror(buffer);
  } else {
    fprintf(stderr, "%s\n", buffer);
  }
  errors += std::string(msg) + '\n';
  return -1;
}

static void flushBuffer(const char* buffer, size_t start, int& end, std::string& file) {
  file += std::string(buffer + start, end - start);