-let next = Uid.make_maker ()
-
-let dummy2 = TransList.cons
- (Transition.make (State.dummy,QNameSet.empty, SFormula.false_))
- TransList.nil
-
-
-
-let dummy_config =
- Config.make { sat = StateSet.empty;
- unsat = StateSet.empty;
- todo = TransList.nil;
- summary = dummy_summary
- }
-
-
-let create s ss =
- let auto = { id = next ();
- states = s;
- selection_states = ss;
- transitions = Hashtbl.create 17;
- cache2 = Cache.N2.create dummy2;
- cache4 = Cache.N4.create dummy_config;
- }
- in
- at_exit (fun () ->
- let n4 = ref 0 in
- let n2 = ref 0 in
- Cache.N2.iteri (fun _ _ _ b -> if b then incr n2) auto.cache2;
- Cache.N4.iteri (fun _ _ _ _ _ b -> if b then incr n4) auto.cache4;
- Logger.msg `STATS "automaton %i, cache2: %i entries, cache6: %i entries"
- (auto.id :> int) !n2 !n4;
- let c2l, c2u = Cache.N2.stats auto.cache2 in
- let c4l, c4u = Cache.N4.stats auto.cache4 in
- Logger.msg `STATS
- "cache2: length: %i, used: %i, occupation: %f"
- c2l c2u (float c2u /. float c2l);
- Logger.msg `STATS
- "cache4: length: %i, used: %i, occupation: %f"
- c4l c4u (float c4u /. float c4l)
-
- );
- auto
-
-let reset a =
- a.cache4 <- Cache.N4.create (Cache.N4.dummy a.cache4)
-
-let full_reset a =
- reset a;
- a.cache2 <- Cache.N2.create (Cache.N2.dummy a.cache2)
-
-
-let get_trans_aux a tag states =
- StateSet.fold (fun q acc0 ->
- try
- let trs = Hashtbl.find a.transitions q in
- List.fold_left (fun acc1 (labs, phi) ->
- if QNameSet.mem tag labs then TransList.cons (Transition.make (q, labs, phi)) acc1 else acc1) acc0 trs
- with Not_found -> acc0
- ) states TransList.nil
-
-
-let get_trans a tag states =
- let trs =
- Cache.N2.find a.cache2
- (tag.QName.id :> int) (states.StateSet.id :> int)
- in
- if trs == dummy2 then
- let trs = get_trans_aux a tag states in
- (Cache.N2.add
- a.cache2
- (tag.QName.id :> int)
- (states.StateSet.id :> int) trs; trs)
- else trs
-
-let simplify_atom atom pos q { Config.node=config; _ } =
- if (pos && StateSet.mem q config.sat)
- || ((not pos) && StateSet.mem q config.unsat) then SFormula.true_
- else if (pos && StateSet.mem q config.unsat)
- || ((not pos) && StateSet.mem q config.sat) then SFormula.false_
- else atom
-
-let eval_form phi fcs nss ps ss summary =
- let rec loop phi =
- begin match SFormula.expr phi with
- Formula.True | Formula.False -> phi
- | Formula.Atom a ->
- let p, b, q = Atom.node a in begin
- match p with
- | First_child -> simplify_atom phi b q fcs
- | Next_sibling -> simplify_atom phi b q nss
- | Parent | Previous_sibling -> simplify_atom phi b q ps
- | Stay -> simplify_atom phi b q ss
- | Is_first_child -> SFormula.of_bool (b == (is_left summary))
- | Is_next_sibling -> SFormula.of_bool (b == (is_right summary))
- | Is k -> SFormula.of_bool (b == (k == (kind summary)))
- | Has_first_child -> SFormula.of_bool (b == (has_left summary))
- | Has_next_sibling -> SFormula.of_bool (b == (has_right summary))
- end
- | Formula.And(phi1, phi2) -> SFormula.and_ (loop phi1) (loop phi2)
- | Formula.Or (phi1, phi2) -> SFormula.or_ (loop phi1) (loop phi2)
- end
- in
- loop phi
-
-
-
-let eval_trans auto fcs nss ps ss =
- let fcsid = (fcs.Config.id :> int) in
- let nssid = (nss.Config.id :> int) in
- let psid = (ps.Config.id :> int) in
- let rec loop old_config =
- let oid = (old_config.Config.id :> int) in
- let res =
- let res = Cache.N4.find auto.cache4 oid fcsid nssid psid in
- if res != dummy_config then res
- else
- let { sat = old_sat;
- unsat = old_unsat;
- todo = old_todo;
- summary = old_summary } = old_config.Config.node
- in
- let sat, unsat, removed, kept, todo =
- TransList.fold
- (fun trs acc ->
- let q, lab, phi = Transition.node trs in
- let a_sat, a_unsat, a_rem, a_kept, a_todo = acc in
- if StateSet.mem q a_sat || StateSet.mem q a_unsat then acc else
- let new_phi =
- eval_form phi fcs nss ps old_config old_summary
- in
- if SFormula.is_true new_phi then
- StateSet.add q a_sat, a_unsat, StateSet.add q a_rem, a_kept, a_todo
- else if SFormula.is_false new_phi then
- a_sat, StateSet.add q a_unsat, StateSet.add q a_rem, a_kept, a_todo
- else
- let new_tr = Transition.make (q, lab, new_phi) in
- (a_sat, a_unsat, a_rem, StateSet.add q a_kept, (TransList.cons new_tr a_todo))
- ) old_todo (old_sat, old_unsat, StateSet.empty, StateSet.empty, TransList.nil)
- in
- (* States that have been removed from the todo list and not kept are now
- unsatisfiable *)
- let unsat = StateSet.union unsat (StateSet.diff removed kept) in
- (* States that were found once to be satisfiable remain so *)
- let unsat = StateSet.diff unsat sat in
- let new_config = Config.make { old_config.Config.node with sat; unsat; todo; } in
- Cache.N4.add auto.cache4 oid fcsid nssid psid new_config;
- new_config
- in
- if res == old_config then res else loop res
- in
- loop ss