+let exists_role_deleted v r =
+ let o = v, [] in
+ let compare r = compare_objs o (obj_of_role r) in
+ list_exists compare r
+
+let rec get_tops v = function
+ | [] -> [], []
+ | (_,r)::tl ->
+ let ds, ts = get_tops v tl in
+ if compare_versions v r.ET.v = 0 then begin
+ if r.ET.n = [] then objs_union r.ET.o ds, ts else
+ let tops = rev_objs_of_names v [] r.ET.n in
+ ds, objs_union (List.rev tops) ts
+ end else
+ ds, ts
+
+let rec match_names oi ni os ns =
+ match os, ns with
+ | _ , [] -> None
+ | [] , _ -> None
+ | (_,o)::otl,(_,n)::ntl ->
+ let b = compare_names (snd o) n in
+ if b > 0 then match_names oi (succ ni) os ntl else
+ if b < 0 then match_names (succ oi) ni otl ns else
+ Some (oi, ni)
+