#define rset_forward(rs, fd, buf, indx, cmpfunc, untilbuf) \
(*(rs)->control->f_forward)((rs), (fd), (buf), (indx), (cmpfunc), (untilbuf))
#define rset_forward(rs, fd, buf, indx, cmpfunc, untilbuf) \
(*(rs)->control->f_forward)((rs), (fd), (buf), (indx), (cmpfunc), (untilbuf))