+/* int rset_forward(RSET rs, void *buf, int *indx, void *untilbuf); */
+#define rset_forward(rs, fd, buf, indx, cmpfunc, untilbuf) \
+ (*(rs)->control->f_forward)((rs), (fd), (buf), (indx), (cmpfunc), (untilbuf))
+
+/* int rset_pos(RSET rs, RSFD fd, double *current, double *total); */
+#define rset_pos(rs,fd,cur,tot) \
+ (*(rs)->control->f_pos)( (fd),(cur),(tot))