+
+int rfd_is_last(RSFD rfd)
+{
+ if (rfd->rset->use_list == rfd && rfd->next == 0)
+ return 1;
+ return 0;
+}
+
+RSET rset_dup (RSET rs)
+{
+ (rs->refcount)++;
+ yaz_log(log_level, "rs_dup(%s), rs=%p, refcount=%d",
+ rs->control->desc, rs, rs->refcount);
+ (*rs->keycontrol->inc)(rs->keycontrol);
+ return rs;
+}
+
+/**
+ * rset_count uses rset_pos to get the total and returns that.
+ * This is ok for rsisamb/c/s, and for some other rsets, but in case of
+ * booleans etc it will give bad estimate, as nothing has been read
+ * from that rset
+ */
+zint rset_count(RSET rs)
+{
+ double cur, tot;
+ RSFD rfd = rset_open(rs, 0);
+ rset_pos(rfd, &cur, &tot);
+ rset_close(rfd);
+ return (zint) tot;
+}
+
+/** rset_get_no_terms is a getterms function for those that don't have any */
+void rset_get_no_terms(RSET ct, TERMID *terms, int maxterms, int *curterm)
+{
+ return;
+}
+
+/* rset_get_one_term gets that one term from an rset. Used by rsisamX */
+void rset_get_one_term(RSET ct, TERMID *terms, int maxterms, int *curterm)
+{
+ if (ct->term)
+ {
+ if (*curterm < maxterms)
+ terms[*curterm] = ct->term;
+ (*curterm)++;
+ }
+}
+
+
+TERMID rset_term_create(const char *name, int length, const char *flags,
+ int type, NMEM nmem)
+
+{
+ TERMID t;
+ yaz_log (log_level, "term_create '%s' %d f=%s type=%d nmem=%p",
+ name, length, flags, type, nmem);
+ t= (TERMID) nmem_malloc(nmem, sizeof(*t));
+ if (!name)
+ t->name = NULL;
+ else if (length == -1)
+ t->name = nmem_strdup(nmem, name);
+ else
+ {
+ t->name = (char*) nmem_malloc(nmem, length+1);
+ memcpy (t->name, name, length);
+ t->name[length] = '\0';
+ }
+ if (!flags)
+ t->flags = NULL;
+ else
+ t->flags = nmem_strdup(nmem, flags);
+ t->type = type;
+ t->rankpriv = 0;
+ t->rset = 0;
+ return t;
+}
+
+int rset_default_read(RSFD rfd, void *buf, TERMID *term)
+{
+ RSET rset = rfd->rset;
+ int rc = (*rset->control->f_read)(rfd, buf, term);
+ if (rc > 0)
+ {
+ if (rfd->counted_items == 0 ||
+ (rset->keycontrol->cmp)(buf, rfd->counted_buf) >= rset->scope)
+ {
+ memcpy(rfd->counted_buf, buf, rset->keycontrol->key_size);
+ rfd->counted_items++;
+ }
+ }
+ return rc;
+}
+
+int rset_default_forward(RSFD rfd, void *buf, TERMID *term,
+ const void *untilbuf)
+{
+ RSET rset = rfd->rset;
+ int more;
+
+ if (rset->control->f_forward &&
+ rfd->counted_items >= rset->hits_limit)
+ {
+ assert (rset->control->f_forward != rset_default_forward);
+ return rset->control->f_forward(rfd, buf, term, untilbuf);
+ }
+
+ while ((more = rset_read(rfd, buf, term)) > 0)
+ {
+ if ((rfd->rset->keycontrol->cmp)(untilbuf, buf) <= 1)
+ break;
+ }
+ if (log_level)
+ yaz_log (log_level, "rset_default_forward exiting m=%d c=%d",
+ more, rset->scope);
+
+ return more;
+}
+
+void rset_visit(RSET rset, int level)
+{
+ int i;
+ yaz_log(YLOG_LOG, "%*s%c " ZINT_FORMAT, level, "",
+ rset->hits_approx ? '~' : '=',
+ rset->hits_count);
+ for (i = 0; i<rset->no_children; i++)
+ rset_visit(rset->children[i], level+1);
+}
+