_dr_next_file
while((file_name = _dr_next_file(cf->dr)) != NULL && !waserr) {
char *_dr_next_file(DirReader *dr);
while((file=_dr_next_file(dr)) != NULL) {
while((filename = _dr_next_file(pc->dr))) {
while((filename = _dr_next_file(pc->dr))) {