+RSET rset_create_base(const struct rset_control *sel,
+ NMEM nmem, const struct key_control *kcontrol,
+ int scope, TERMID term)
+{
+ RSET rnew;
+ NMEM M;
+ /* assert(nmem); */ /* can not yet be used, api/t4 fails */
+ if (!log_level_initialized)
+ {
+ log_level = yaz_log_module_level("rset");
+ log_level_initialized = 1;
+ }
+
+ if (nmem)
+ M = nmem;
+ else
+ M = nmem_create();
+ rnew = (RSET) nmem_malloc(M, sizeof(*rnew));
+ yaz_log(log_level, "rs_create(%s) rs=%p (nm=%p)", sel->desc, rnew, nmem);
+ rnew->nmem = M;
+ if (nmem)
+ rnew->my_nmem = 0;
+ else
+ rnew->my_nmem = 1;
+ rnew->control = sel;
+ rnew->count = 1; /* refcount! */
+ rnew->priv = 0;
+ rnew->free_list = NULL;
+ rnew->use_list = NULL;
+ rnew->keycontrol = kcontrol;
+ rnew->scope = scope;
+ rnew->term = term;
+ if (term)
+ term->rset = rnew;
+ return rnew;
+}
+
+void rset_delete (RSET rs)
+{
+ (rs->count)--;
+ yaz_log(log_level, "rs_delete(%s), rs=%p, count=%d",
+ rs->control->desc, rs, rs->count);
+ if (!rs->count)
+ {
+ if (rs->use_list)
+ yaz_log(YLOG_WARN, "rs_delete(%s) still has RFDs in use",
+ rs->control->desc);
+ (*rs->control->f_delete)(rs);
+ if (rs->my_nmem)
+ nmem_destroy(rs->nmem);
+ }
+}
+
+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->count)++;
+ yaz_log(log_level, "rs_dup(%s), rs=%p, count=%d",
+ rs->control->desc, rs, rs->count);
+ return rs;
+}
+
+int rset_default_forward(RSFD rfd, void *buf, TERMID *term,
+ const void *untilbuf)
+{
+ int more = 1;
+ int cmp = rfd->rset->scope;
+ if (log_level)
+ {
+ yaz_log (log_level, "rset_default_forward starting '%s' (ct=%p rfd=%p)",
+ rfd->rset->control->desc, rfd->rset, rfd);
+ /* key_logdump(log_level, untilbuf); */
+ }
+ while (cmp>=rfd->rset->scope && more)
+ {
+ if (log_level) /* time-critical, check first */
+ yaz_log(log_level, "rset_default_forward looping m=%d c=%d",
+ more, cmp);
+ more = rset_read(rfd, buf, term);
+ if (more)
+ cmp = (rfd->rset->keycontrol->cmp)(untilbuf, buf);
+ }
+ if (log_level)
+ yaz_log (log_level, "rset_default_forward exiting m=%d c=%d",
+ more, cmp);
+
+ return more;
+}
+
+/**
+ * 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;
+}