ST_BLANK_READ
if (ISSET(st->flags, ST_BLANK_READ)) {
CLR(st->flags, ST_BLANK_READ);
if (ISSET(st->flags, ST_BLANK_READ) && (number < 0)) {
CLR(st->flags, ST_BLANK_READ);
} else if (!ISSET(st->flags, ST_2FM_AT_EOD | ST_BLANK_READ)) {
SET(st->flags, ST_BLANK_READ);
ST_BLANK_READ)