(l2gi_searchsome_reverse): New function.

(l2gi_prev): New function.

src/server/local-to-global.h

@@ -136,4 +136,44 @@ Local_text_no l2gi_end(const L2g_iterator *l2gi);
    was created.  */
 Local_text_no l2gi_begin(const L2g_iterator *l2gi);
 
+/* ================================================================ */
+
+
+/*
+ * Reverse iterator for a Local_to_global.
+ *
+ * Usage:
+ *
+ * Local_to_global  l2g;
+ * L2g_reverse_iterator l2gi;
+ *
+ * for (l2gi_searchall_reverse(&l2gi, &l2g);   // Not implemented yet.
+ *      !l2gi.search_ended;
+ *      l2gi_prev(&l2gi))
+ * {
+ *     use(l2gi.lno, l2gi.tno);
+ * }
+ *
+ * or:
+ *
+ * for (l2gi_searchsome_reverse(&l2gi, &l2g, lower_limit, upper_limit);
+ *      !l2gi.search_ended;
+ *      l2gi_prev(&l2gi)) 
+ * {
+ *     use(l2gi.lno, l2gi.tno);
+ * }
+ */
+
+/* Create an iterator that will iterate through all existing texts
+   with a local text number lno such that
+   	begin <= lno < end
+   starting at end-1 and ending at begin. */
+void l2gi_searchsome_reverse(L2g_reverse_iterator *l2gi,
+			     const Local_to_global *l2g, 
+			     Local_text_no begin,
+			     Local_text_no end);
+
+/* Step the iterator forward, eh, backwards, eh, towards begin.  */
+void l2gi_prev(L2g_reverse_iterator *l2gi);
+
 #endif /* LOCAL2GLOBAL_H_INCLUDED */