+void rset_default_pos (RSFD rfd, double *current, double *total)
+{ /* This should never really be needed, but it is still used in */
+ /* those rsets that we don't really plan to use, like isam-s */
+ assert(rfd);
+ assert(current);
+ assert(total);
+ *current=-1; /* signal that pos is not implemented */
+ *total=-1;
+} /* rset_default_pos */
+
+int rset_default_forward(RSET ct, RSFD rfd, void *buf,
+ int (*cmpfunc)(const void *p1, const void *p2),
+ const void *untilbuf)