#include <stdio.h>
#include <sys/types.h>

size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) {
  // FIXME: Check for overflow
  ssize_t bytes_to_write = nmemb * size;
  size_t rc = stream->write(stream, ptr, bytes_to_write);
  // On  success, fwrite() return the number of items
  // written.
  rc /= size;
  return rc;
}