(***********************************************************************)
INCLUDE "utils.ml"
-open Format
-open Misc
-
-module Make (T : Tree.S) =
- struct
-
- module NodeSummary =
- struct
- (* Pack into an integer the result of the is_* and has_ predicates
- for a given node *)
- type t = int
- let dummy = -1
- (*
- 4444444444443210
- 4 -> kind
- 3 -> is_left
- 2 -> is_right
- 1 -> has_left
- 0 -> has_right
- *)
-
- let has_right (s : t) : bool =
- Obj.magic (s land 1)
-
- let has_left (s : t) : bool =
- Obj.magic ((s lsr 1) land 1)
-
- let is_right (s : t) : bool =
- Obj.magic ((s lsr 2) land 1)
-
- let is_left (s : t) : bool =
- Obj.magic ((s lsr 3) land 1)
-
- let kind (s : t) : Tree.NodeKind.t =
- Obj.magic (s lsr 4)
-
- let make is_left is_right has_left has_right kind =
- ((Obj.magic kind) lsl 4) lor
- ((int_of_bool is_left) lsl 3) lor
- ((int_of_bool is_right) lsl 2) lor
- ((int_of_bool has_left) lsl 1) lor
- (int_of_bool has_right)
-
- end
-
- type node_status = {
- sat : StateSet.t;
- unsat : StateSet.t;
- todo : Ata.TransList.t;
- summary : NodeSummary.t;
- }
-(* Describe what is kept at each node for a run *)
-
- module NodeStatus = Hcons.Make(struct
- type t = node_status
- let equal c d =
- c == d ||
- c.sat == d.sat &&
- c.unsat == d.unsat &&
- c.todo == d.todo &&
- c.summary == d.summary
-
- let hash c =
- HASHINT4((c.sat.StateSet.id :> int),
- (c.unsat.StateSet.id :> int),
- (c.todo.Ata.TransList.id :> int),
- c.summary)
- end
- )
-
- let dummy_status =
- NodeStatus.make { sat = StateSet.empty;
- unsat = StateSet.empty;
- todo = Ata.TransList.nil;
- summary = NodeSummary.dummy;
- }
-
-
- type run = {
- tree : T.t ;
- (* The argument of the run *)
- auto : Ata.t;
- (* The automaton to be run *)
- status : NodeStatus.t array;
- (* A mapping from node preorders to NodeStatus *)
- unstable : Bitvector.t;
- (* A bitvector remembering whether a subtree is stable *)
- mutable redo : bool;
- (* A boolean indicating whether the run is incomplete *)
- mutable pass : int;
- (* The number of times this run was updated *)
- mutable cache2 : Ata.TransList.t Cache.N2.t;
- (* A cache from states * label to list of transitions *)
- mutable cache4 : NodeStatus.t Cache.N4.t;
- }
-
- let pass r = r.pass
- let stable r = not r.redo
- let auto r = r.auto
- let tree r = r.tree
-
-
- let dummy_trl =
- Ata.(TransList.cons
- (Transition.make
- (State.dummy,QNameSet.empty, Formula.false_))
- TransList.nil)
-
- let make auto tree =
- let len = T.size tree in
- {
- tree = tree;
- auto = auto;
- status = Array.create len dummy_status;
- unstable = Bitvector.create ~init:true len;
- redo = true;
- pass = 0;
- cache2 = Cache.N2.create dummy_trl;
- cache4 = Cache.N4.create dummy_status;
- }
-
- let get_status a i =
- if i < 0 then dummy_status else Array.get a i
-
- let unsafe_get_status a i =
- if i < 0 then dummy_status else Array.unsafe_get a i
-
-IFDEF HTMLTRACE
- THEN
-DEFINE TRACE(e) = (e)
- ELSE
-DEFINE TRACE(e) = ()
-END
-
- let html tree node i config msg =
- let config = config.NodeStatus.node in
- Html.trace (T.preorder tree node) i
- "node: %i<br/>%s<br/>sat: %a<br/>unsat: %a<br/>todo: %around: %i<br/>"
- (T.preorder tree node)
- msg
- StateSet.print config.sat
- StateSet.print config.unsat
- (Ata.TransList.print ~sep:"<br/>") config.todo i
-
-
- let debug msg tree node i config =
- let config = config.NodeStatus.node in
- eprintf
- "DEBUG:%s node: %i\nsat: %a\nunsat: %a\ntodo: %around: %i\n"
- msg
- (T.preorder tree node)
- StateSet.print config.sat
- StateSet.print config.unsat
- (Ata.TransList.print ~sep:"\n") config.todo i
-
-
- let get_trans cache2 auto tag states =
- let trs =
- Cache.N2.find cache2
- (tag.QName.id :> int) (states.StateSet.id :> int)
- in
- if trs == dummy_trl then
- let trs = Ata.get_trans auto tag states in
- (Cache.N2.add
- cache2
- (tag.QName.id :> int)
- (states.StateSet.id :> int) trs; trs)
- else trs
-
-
-
- let simplify_atom atom pos q { NodeStatus.node = status; _ } =
- if (pos && StateSet.mem q status.sat)
- || ((not pos) && StateSet.mem q status.unsat) then Ata.Formula.true_
- else if (pos && StateSet.mem q status.unsat)
- || ((not pos) && StateSet.mem q status.sat) then Ata.Formula.false_
- else atom
-
-
- let eval_form phi fcs nss ps ss summary =
- let open Ata in
- let rec loop phi =
- begin match Formula.expr phi with
- Boolean.True | Boolean.False -> phi
- | Boolean.Atom (a, b) ->
- begin
- let open NodeSummary in
- match a.Atom.node with
- | Move (m, q) ->
- let states = match m with
- `First_child -> fcs
- | `Next_sibling -> nss
- | `Parent | `Previous_sibling -> ps
- | `Stay -> ss
- in simplify_atom phi b q states
- | Is_first_child -> Formula.of_bool (b == is_left summary)
- | Is_next_sibling -> Formula.of_bool (b == is_right summary)
- | Is k -> Formula.of_bool (b == (k == kind summary))
- | Has_first_child -> Formula.of_bool (b == has_left summary)
- | Has_next_sibling -> Formula.of_bool (b == has_right summary)
- end
- | Boolean.And(phi1, phi2) -> Formula.and_ (loop phi1) (loop phi2)
- | Boolean.Or (phi1, phi2) -> Formula.or_ (loop phi1) (loop phi2)
- end
- in
- loop phi
-
-
-
- let eval_trans cache4 fcs nss ps ss =
- let fcsid = (fcs.NodeStatus.id :> int) in
- let nssid = (nss.NodeStatus.id :> int) in
- let psid = (ps.NodeStatus.id :> int) in
- let rec loop old_config =
- let oid = (old_config.NodeStatus.id :> int) in
- let res =
- let res = Cache.N4.find cache4 oid fcsid nssid psid in
- if res != dummy_status then res
- else
- let { sat = old_sat;
- unsat = old_unsat;
- todo = old_todo;
- summary = old_summary } = old_config.NodeStatus.node
- in
- let sat, unsat, removed, kept, todo =
- Ata.TransList.fold
- (fun trs acc ->
- let q, lab, phi = Ata.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 Ata.Formula.is_true new_phi then
- StateSet.add q a_sat, a_unsat, StateSet.add q a_rem, a_kept, a_todo
- else if Ata.Formula.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 = Ata.Transition.make (q, lab, new_phi) in
- (a_sat, a_unsat, a_rem, StateSet.add q a_kept, (Ata.TransList.cons new_tr a_todo))
- ) old_todo (old_sat, old_unsat, StateSet.empty, StateSet.empty, Ata.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 = NodeStatus.make { old_config.NodeStatus.node with sat; unsat; todo; } in
- Cache.N4.add cache4 oid fcsid nssid psid new_config;
- new_config
- in
- if res == old_config then res else loop res
- in
- loop ss
+INCLUDE "debug.ml"
+module Make (T : Tree.S) =
+struct
+
+ let eval_form phi tree node fcs nss pars selfs =
+ let rec loop phi =
+ let open Boolean in
+ match Ata.Formula.expr phi with
+ False -> false
+ | True -> true
+ | Or (phi1, phi2) -> loop phi1 || loop phi2
+ | And (phi1, phi2) -> loop phi1 && loop phi2
+ | Atom (a, b) -> b == Ata.(
+ match Atom.node a with
+ Is_first_child -> let par = T.parent tree node in
+ (T.first_child tree par) == node
+ | Is_next_sibling -> let par = T.parent tree node in
+ (T.next_sibling tree par) == node
+ | Is k -> k == T.kind tree node
+ | Has_first_child -> T.nil != T.first_child tree node
+ | Has_next_sibling -> T.nil != T.next_sibling tree node
+ | Move (m, q) ->
+ let set =
+ match m with
+ `First_child -> fcs
+ | `Next_sibling -> nss
+ | `Parent
+ | `Previous_sibling -> pars
+ | `Stay -> selfs
+ in
+ StateSet.mem q set
+ )
+ in
+ loop phi
+
+
+ let eval_trans_aux trans tree node fcs nss pars selfs =
+ let open Ata in
+ TransList.fold (fun trs acc ->
+ let q, _ , phi = Transition.node trs in
+ let res = eval_form phi tree node fcs nss pars selfs in
+ if false then begin
+ Format.eprintf "Formula %a evaluates to %b with context: (fcs=%a, nss=%a, pars=%a, olds=%a) @\n@."
+ Formula.print phi res
+ StateSet.print fcs
+ StateSet.print nss
+ StateSet.print pars
+ StateSet.print selfs
+ end;
+ if res then
+ StateSet.add q acc
+ else
+ acc) trans selfs
+
+ let eval_trans trans tree node fcs nss pars sstates =
+ let rec loop olds =
+
+ let news = eval_trans_aux trans tree node fcs nss pars olds in
+ if false then begin
+ Format.eprintf "Saturating formula: olds=%a, news=%a@\n@."
+ StateSet.print olds
+ StateSet.print news
+ end;
+ if news == olds then olds else
+ loop news
+ in
+ let r = loop sstates in
+ if false then begin
+ Format.eprintf "Evaluating transitions (fcs=%a, nss=%a, pars=%a, olds=%a):@\n\t%a@."
+ StateSet.print fcs
+ StateSet.print nss
+ StateSet.print pars
+ StateSet.print sstates
+ (Ata.TransList.print ~sep:"\n\t") trans;
+ Format.eprintf "Got %a@\n@." StateSet.print r;
+ end;
+ r
- let top_down run =
- let tree = run.tree in
- let auto = run.auto in
- let status = run.status in
- let cache2 = run.cache2 in
- let cache4 = run.cache4 in
- let unstable = run.unstable in
- let rec loop node =
- let node_id = T.preorder tree node in
- if node == T.nil || not (Bitvector.get unstable node_id) then false else begin
- let parent = T.parent tree node in
- let fc = T.first_child tree node in
- let fc_id = T.preorder tree fc in
- let ns = T.next_sibling tree node in
- let ns_id = T.preorder tree ns in
- let tag = T.tag tree node in
- (* We enter the node from its parent *)
-
- let status0 =
- let c = unsafe_get_status status node_id in
- if c == dummy_status then
- (* first time we visit the node *)
- NodeStatus.make
- { sat = StateSet.empty;
- unsat = Ata.get_starting_states auto;
- todo = get_trans cache2 auto tag (Ata.get_states auto);
- summary = NodeSummary.make
- (node == T.first_child tree parent) (* is_left *)
- (node == T.next_sibling tree parent) (* is_right *)
- (fc != T.nil) (* has_left *)
- (ns != T.nil) (* has_right *)
- (T.kind tree node) (* kind *)
- }
- else c
- in
-
- TRACE(html tree node _i config0 "Entering node");
-
- (* get the node_statuses for the first child, next sibling and parent *)
- let ps = unsafe_get_status status (T.preorder tree parent) in
- let fcs = unsafe_get_status status fc_id in
- let nss = unsafe_get_status status ns_id in
- (* evaluate the transitions with all this statuses *)
- let status1 = eval_trans cache4 fcs nss ps status0 in
-
- TRACE(html tree node _i config1 "Updating transitions");
-
- (* update the cache if the status of the node changed *)
-
- if status1 != status0 then status.(node_id) <- status1;
- (* recursively traverse the first child *)
- let unstable_left = loop fc in
- (* here we re-enter the node from its first child,
- get the new status of the first child *)
- let fcs1 = unsafe_get_status status fc_id in
- (* update the status *)
- let status2 = eval_trans cache4 fcs1 nss ps status1 in
-
- TRACE(html tree node _i config2 "Updating transitions (after first-child)");
-
- if status2 != status1 then status.(node_id) <- status2;
- let unstable_right = loop ns in
- let nss1 = unsafe_get_status status ns_id in
- let status3 = eval_trans cache4 fcs1 nss1 ps status2 in
-
- TRACE(html tree node _i config3 "Updating transitions (after next-sibling)");
-
- if status3 != status2 then status.(node_id) <- status3;
-
- let unstable_self =
- (* if either our left or right child is unstable or if we still have transitions
- pending, the current node is unstable *)
- unstable_left
- || unstable_right
- || Ata.TransList.nil != status3.NodeStatus.node.todo
+ let auto_run auto tree prev_nodes td_states bu_states exit_states _i =
+ if false then
+ Format.eprintf "Doing a td (with states: %a) and a bu (with states: %a), exit states are: %a @\n@."
+ StateSet.print td_states
+ StateSet.print bu_states
+ StateSet.print exit_states;
+ let rec loop res node parset =
+ if node == T.nil then StateSet.empty else begin
+ let set,lset,rset =
+ if Sequence.is_empty prev_nodes then
+ StateSet.(empty,empty,empty)
+ else
+ let set,lset,rset, node' = Sequence.peek prev_nodes in
+ if node == node' then begin
+ ignore (Sequence.pop prev_nodes);
+ set,lset,rset
+ end
+ else
+ StateSet.(empty,empty,empty)
in
- Bitvector.unsafe_set unstable node_id unstable_self;
- TRACE((if not unstable_self then
- Html.finalize_node
- node_id
- _i
- Ata.(StateSet.intersect config3.Config.node.sat auto.selection_states)));
- unstable_self
+ let tag = T.tag tree node in
+ let td_trans = Ata.get_trans auto tag td_states in
+ let status1 = eval_trans td_trans tree node lset rset parset set in
+ let fcs = loop res (T.first_child tree node) status1 in
+ let rres = Sequence.create () in
+ let nss = loop rres (T.next_sibling tree node) status1 in
+ let bu_trans = Ata.get_trans auto tag bu_states in
+ let status2 = eval_trans bu_trans tree node fcs nss parset status1 in
+ let mstates = StateSet.inter status2 exit_states in
+ if false then begin
+ Format.eprintf "On node %i (tag : %a) status0 = %a, status1 = %a, fcs = %a, nss = %a, par = %a, status2 = %a, mstates = %a@\n@."
+ (T.preorder tree node)
+ QName.print tag
+ StateSet.print set
+ StateSet.print status1
+ StateSet.print fcs
+ StateSet.print nss
+ StateSet.print parset
+ StateSet.print status2
+ StateSet.print mstates;
+ end;
+ if mstates != StateSet.empty then
+ Sequence.push_front (mstates,
+ StateSet.inter exit_states fcs,
+ StateSet.inter exit_states nss, node) res;
+ Sequence.append res rres;
+ status2
end
in
- run.redo <- loop (T.root tree);
- run.pass <- run.pass + 1
+ let res = Sequence.create () in
+ ignore (loop res (T.root tree) StateSet.empty);
+ if false then Format.eprintf "Finished pass: %i @\n-----------------------@\n@." _i;
+ res
+
+
+
+ let prepare_run auto l =
+ let res = Sequence.create () in
+ let start = Ata.get_starting_states auto in
+ Sequence.iter (fun n -> Sequence.push_back (start, StateSet.empty, StateSet.empty, n) res) l;
+ res
+
+
+ let main_eval auto tree nodes =
+ let s_nodes = prepare_run auto nodes in
+
+ let ranked_states = Ata.get_states_by_rank auto in
+ let acc = ref s_nodes in
+ let max_rank = Ata.get_max_rank auto in
+ for i = 0 to max_rank do
+ let open Ata in
+ let { td; bu; exit } = ranked_states.(i) in
+ acc := auto_run auto tree !acc td bu exit i;
+ if false then begin
+ Format.eprintf "Intermediate result is: @\n";
+ Sequence.iter (fun (s,_,_, n) ->
+ Format.eprintf "{%a, %i (%a)} "
+ StateSet.print s
+ (T.preorder tree n)
+ QName.print (T.tag tree n)) !acc;
+ Format.eprintf "@\n@.";
+ end
-(*
- let stats run =
- let count = ref 0 in
- let len = Bitvector.length run.unstable in
- for i = 0 to len - 1 do
- if not (Bitvector.unsafe_get run.unstable i) then
- incr count
done;
- Logger.msg `STATS
- "%i nodes over %i were skipped in iteration %i (%.2f %%), redo is: %b"
- !count len run.pass (100. *. (float !count /. float len))
- run.redo
-
-
- let eval auto tree node =
- let len = T.size tree in
- let run = { config = Array.create len Ata.dummy_config;
- unstable = Bitvector.create ~init:true len;
- redo = true;
- pass = 0
- }
- in
- while run.redo do
- run.redo <- false;
- Ata.reset auto; (* prevents the .cache2 and .cache4 memoization tables from growing too much *)
- run.redo <- top_down_run auto tree node run;
- stats run;
- run.pass <- run.pass + 1;
- done;
- at_exit (fun () -> Logger.msg `STATS "%i iterations" run.pass);
- at_exit (fun () -> stats run);
- let r = get_results auto tree node run.config in
-
- TRACE(Html.gen_trace (module T : Tree.S with type t = T.t) (tree));
+ !acc
+ let eval auto tree nodes =
+ let res = main_eval auto tree nodes in
+ let r = Sequence.create () in
+ Sequence.iter (fun (_,_,_, n) -> Sequence.push_back n r) res;
r
-*)
- let get_results run =
- let cache = run.status in
- let auto = run.auto in
- let tree = run.tree in
- let rec loop node acc =
- if node == T.nil then acc
- else
- let acc0 = loop (T.next_sibling tree node) acc in
- let acc1 = loop (T.first_child tree node) acc0 in
-
- if Ata.(
- StateSet.intersect
- cache.(T.preorder tree node).NodeStatus.node.sat
- (get_selecting_states auto)) then node::acc1
- else acc1
+ let full_eval auto tree nodes =
+ let res = main_eval auto tree nodes in
+ let dummy = Sequence.create () in
+ let cache = Cache.N1.create dummy in
+ Sequence.iter (fun (set, _, _, n) ->
+ StateSet.iter (fun q ->
+ let qres = Cache.N1.find cache q in
+ let qres =
+ if qres == dummy then begin
+ let s = Sequence.create () in
+ Cache.N1.add cache q s;
+ s
+ end
+ else qres
+ in
+ Sequence.push_back n qres) set )
+ res;
+ let l = StateSet.fold (fun q acc ->
+ let res = Cache.N1.find cache q in
+ (q, res) :: acc) (Ata.get_selecting_states auto) []
in
- loop (T.root tree) []
-
- let prepare_run run list =
- let tree = run.tree in
- let auto = run.auto in
- let status = run.status in
- let cache2 = run.cache2 in
- List.iter (fun node ->
- let parent = T.parent tree node in
- let fc = T.first_child tree node in
- let ns = T.next_sibling tree node in
- let tag = T.tag tree node in
-
- let status0 =
- NodeStatus.make
- { sat = Ata.get_starting_states auto;
- unsat = StateSet.empty;
- todo = get_trans cache2 auto tag (Ata.get_states auto);
- summary = NodeSummary.make
- (node == T.first_child tree parent) (* is_left *)
- (node == T.next_sibling tree parent) (* is_right *)
- (fc != T.nil) (* has_left *)
- (ns != T.nil) (* has_right *)
- (T.kind tree node) (* kind *)
- }
- in
- let node_id = T.preorder tree node in
- status.(node_id) <- status0) list
+ List.rev l
-
-
- let eval auto tree nodes =
- let run = make auto tree in
- prepare_run run nodes;
- while run.redo do
- top_down run;
- done;
- get_results run
end
projects / tatoo.git / blobdiff