+/**
+ \brief Closes a result set RFD handle
+ \param rfd the RFD handle.
+*/
+void rset_close(RSFD rfd)
+{
+ RSFD *pfd;
+ RSET rs = rfd->rset;
+
+ if (rs->hits_count == 0)
+ {
+ TERMID termid;
+ char buf[100];
+ while(rfd->counted_items <= rs->hits_limit
+ && rset_default_read(rfd, buf, &termid))
+ ;
+
+ rs->hits_count = rfd->counted_items;
+ yaz_log(log_level, "rset_close rset=%p hits_count=" ZINT_FORMAT
+ " hits_limit=" ZINT_FORMAT,
+ rs, rs->hits_count, rs->hits_limit);
+ rs->hits_approx = 0;
+ if (rs->hits_count > rs->hits_limit)
+ {
+ double cur, tot;
+ zint est;
+ rset_pos(rfd, &cur, &tot);
+ if (tot > 0) {
+ int i;
+ double ratio = cur/tot;
+ est = (zint)(0.5 + rs->hits_count / ratio);
+ yaz_log(log_level, "Estimating hits (%s) "
+ "%0.1f->" ZINT_FORMAT
+ "; %0.1f->" ZINT_FORMAT,
+ rs->control->desc,
+ cur, rs->hits_count,
+ tot, est);
+ i = 0; /* round to significant digits */
+ while (est > rs->hits_round) {
+ est /= 10;
+ i++;
+ }
+ while (i--)
+ est *= 10;
+ rs->hits_count = est;
+ rs->hits_approx = 1;
+ }
+ }
+ yaz_log(log_level, "rset_close p=%p count=" ZINT_FORMAT, rs,
+ rs->hits_count);
+ }
+ (*rs->control->f_close)(rfd);
+
+ yaz_log(log_level, "rfd_delete_base: rfd=%p rs=%p priv=%p fl=%p",
+ rfd, rs, rfd->priv, rs->free_list);
+ for (pfd = &rs->use_list; *pfd; pfd = &(*pfd)->next)
+ if (*pfd == rfd)
+ {
+ *pfd = (*pfd)->next;
+ rfd->next = rs->free_list;
+ rs->free_list = rfd;
+ return;
+ }
+ yaz_log(YLOG_WARN, "rset_close handle not found. type=%s",
+ rs->control->desc);
+}
+
+/**
+ \brief Common constuctor for RSETs
+ \param sel The interface control handle
+ \param nmem The memory handle for it.
+ \param kcontrol Key control info (decode, encode, comparison etc)
+ \param scope scope for set
+ \param term Information about term for it (NULL for none).
+ \param no_children number of child rsets (0 for none)
+ \param children child rsets (NULL for none).
+
+ Creates an rfd. Either allocates a new one, in which case the priv
+ pointer is null, and will have to be filled in, or picks up one
+ from the freelist, in which case the priv is already allocated,
+ and presumably everything that hangs from it as well
+*/
+RSET rset_create_base(const struct rset_control *sel,
+ NMEM nmem, struct rset_key_control *kcontrol,
+ int scope, TERMID term,
+ int no_children, RSET *children)
+{
+ RSET rset;
+ assert(nmem);
+ if (!log_level_initialized)
+ {
+ log_level = yaz_log_module_level("rset");
+ log_level_initialized = 1;
+ }
+
+ rset = (RSET) nmem_malloc(nmem, sizeof(*rset));
+ yaz_log(log_level, "rs_create(%s) rs=%p (nm=%p)", sel->desc, rset, nmem);
+ yaz_log(log_level, " ref_id=%s limit=" ZINT_FORMAT,
+ (term && term->ref_id ? term->ref_id : "null"),
+ rset->hits_limit);
+ rset->nmem = nmem;
+ rset->control = sel;
+ rset->refcount = 1;
+ rset->priv = 0;
+ rset->free_list = NULL;
+ rset->use_list = NULL;
+ rset->hits_count = 0;
+ rset->hits_limit = 0;
+ rset->hits_round = 1000;
+ rset->keycontrol = kcontrol;
+
+ (*kcontrol->inc)(kcontrol);
+ rset->scope = scope;
+ rset->term = term;
+ if (term)
+ {
+ term->rset = rset;
+ rset->hits_limit = term->hits_limit;
+ }
+ rset->no_children = no_children;
+ rset->children = 0;
+ if (no_children)
+ {
+ rset->children = (RSET*)
+ nmem_malloc(rset->nmem, no_children*sizeof(RSET *));
+ memcpy(rset->children, children, no_children*sizeof(RSET *));
+ }
+ return rset;
+}
+
+/**
+ \brief Destructor RSETs
+ \param rs Handle for result set.
+
+ Destroys a result set and all its children.
+ The f_delete method of control is called for the result set.
+*/
+void rset_delete(RSET rs)