+struct reclist_sortparms *reclist_parse_sortparms(NMEM nmem, const char *parms)
+{
+ struct reclist_sortparms *res = 0;
+ struct reclist_sortparms **rp = &res;
+ struct conf_service *service = config->servers->service;
+
+ if (strlen(parms) > 256)
+ return 0;
+ while (*parms)
+ {
+ char parm[256];
+ char *pp;
+ const char *cpp;
+ int increasing;
+ int i;
+ int offset;
+ enum conf_sortkey_type type;
+ struct reclist_sortparms *new;
+
+ if (!(cpp = strchr(parms, ',')))
+ cpp = parms + strlen(parms);
+ strncpy(parm, parms, cpp - parms);
+ parm[cpp-parms] = '\0';
+
+ if ((pp = strchr(parm, ':')))
+ {
+ increasing = pp[1] == '1' ? 1 : 0;
+ *pp = '\0';
+ }
+ else
+ increasing = 0;
+ if (!strcmp(parm, "relevance"))
+ {
+ type = Metadata_sortkey_relevance;
+ offset = -1;
+ }
+ else
+ {
+ for (i = 0; i < service->num_sortkeys; i++)
+ {
+ struct conf_sortkey *sk = &service->sortkeys[i];
+ if (!strcmp(sk->name, parm))
+ {
+ type = sk->type;
+ if (type == Metadata_sortkey_skiparticle)
+ type = Metadata_sortkey_string;
+ break;
+ }
+ }
+ if (i >= service->num_sortkeys)
+ {
+ yaz_log(YLOG_FATAL, "Bad sortkey: %s", parm);
+ return 0;
+ }
+ else
+ offset = i;
+ }
+ new = *rp = nmem_malloc(nmem, sizeof(struct reclist_sortparms));
+ new->next = 0;
+ new->offset = offset;
+ new->type = type;
+ new->increasing = increasing;
+ rp = &new->next;
+ if (*(parms = cpp))
+ parms++;
+ }
+ return res;
+}
+
+static int reclist_cmp(const void *p1, const void *p2)
+{
+ struct record_cluster *r1 = (*(struct record_cluster**) p1);
+ struct record_cluster *r2 = (*(struct record_cluster**) p2);
+ struct reclist_sortparms *s;
+
+ for (s = sortparms; s; s = s->next)
+ {
+ int res;
+ switch (s->type)
+ {
+ case Metadata_sortkey_relevance:
+ res = r2->relevance - r1->relevance;
+ break;
+ case Metadata_sortkey_string:
+ res = strcmp(r2->sortkeys[s->offset]->text, r1->sortkeys[s->offset]->text);
+ break;
+ case Metadata_sortkey_numeric:
+ res = 0;
+ break;
+ default:
+ yaz_log(YLOG_FATAL, "Bad sort type: %d", s->type);
+ exit(1);
+ }
+ if (res)
+ {
+ if (s->increasing)
+ res *= -1;
+ return res;
+ }
+ }
+ return 0;
+}
+
+void reclist_sort(struct reclist *l, struct reclist_sortparms *parms)
+{
+ sortparms = parms;
+ qsort(l->flatlist, l->num_records, sizeof(struct record_cluster*), reclist_cmp);
+ reclist_rewind(l);
+}
+