Thread: Using a char-array in stead of an external data file

No, not really. If you can change the function then you would be able to pass an istream to the function. Then instead of a char array you could put the data in a stringstream and pass that. If you can't change the function then you're pretty much stuck with using a temporary file:

Code:

void callee(FILE *in);

void
caller(
  char   *buffer,
  size_t  size
  )
{
  FILE *temp = tmpfile();

  if (!temp) {
    // Error
  }
  fwrite(buffer, 1, size, temp);
  rewind(temp);
  callee(temp);
  fclose(temp);
}