bool dfm_close_writer (struct dfm_writer *);
bool dfm_write_error (const struct dfm_writer *);
bool dfm_put_record (struct dfm_writer *, const char *rec, size_t len);
bool dfm_close_writer (struct dfm_writer *);
bool dfm_write_error (const struct dfm_writer *);
bool dfm_put_record (struct dfm_writer *, const char *rec, size_t len);