BF_FILE_TYPE
SM_FILE_T SM_IO_SET_TYPE(vector, BF_FILE_TYPE, sm_bfopen, sm_bfclose,
SM_IO_INIT_TYPE(vector, BF_FILE_TYPE, sm_bfopen, sm_bfclose,
if (sm_io_getinfo(e->e_dfp, SM_IO_WHAT_ISTYPE, BF_FILE_TYPE))
sm_io_getinfo(e->e_dfp, SM_IO_WHAT_ISTYPE, BF_FILE_TYPE))