viewcvs.cgi/runtime/run_dispatch.ml

(* Running dispatchers *)

(* TODO: remove `Absent and clean .... *)

open Value


let make_result_prod v1 r1 v2 r2 v (code,r) = 
  let ret = Array.map
    (function
       | `Catch -> v
       | `Const c -> const c
       | `Left i -> if (i < 0) then v1 else r1.(i)
       | `Right j -> if (j < 0) then v2 else r2.(j)
       | `Recompose (i,j) -> 
           Pair ((if (i < 0) then v1 else r1.(i)),
                 (if (j < 0) then v2 else r2.(j)))
       | _ -> assert false
    ) r in
  (code,ret)

let make_result_record fields v bindings (code,r) =
  let ret = Array.map
    (function
       | `Catch -> v
       | `Const c -> const c
       | `Field (l,i) -> 
           if (i < 0) then List.assoc l fields
           else (List.assoc l bindings).(i)
       | _ -> assert false
    ) r in
  (code,ret)

let make_result_basic v (code,r) = 
  let ret = Array.map
    (function
       | `Catch -> v
       | `Const c -> const c
       | _ -> assert false
    ) r in
  (code,ret)

let dummy_r = [||]

let rec run_dispatcher d v = 
  let actions = Patterns.Compile.actions d in
  match actions with
    | `Ignore r -> make_result_basic v r
    | `Kind k -> run_disp_kind k v

and run_disp_kind actions v =
  match v with
  | Pair (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.prod
  | Xml (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.xml
  | Record r -> run_disp_record r v [] r false actions.Patterns.Compile.record
  | Atom a -> 
      run_disp_basic v (fun t -> Types.Atom.has_atom t a) 
        actions.Patterns.Compile.basic
  | Char c ->
      run_disp_basic v (fun t -> Types.Char.has_char t c) 
        actions.Patterns.Compile.basic
  | Integer i ->
      run_disp_basic v (fun t -> Types.Int.has_int t i) 
        actions.Patterns.Compile.basic
  | Abstraction (iface,_) ->
      run_disp_basic v (fun t -> Types.Arrow.check_iface iface t) 
        actions.Patterns.Compile.basic
  | v ->
      run_disp_kind actions (normalize v) 


and run_disp_basic v f x = 
  match x with
  | [(_,r)] -> make_result_basic v r
  | (t,r)::rem -> if f t then make_result_basic v r else run_disp_basic v f rem
  | _ -> assert false
  

and run_disp_prod v v1 v2 x =
  match x with
  | `None -> assert false
  | `TailCall d1 -> run_dispatcher d1 v1
  | `Ignore d2 -> run_disp_prod2 v1 dummy_r v v2 d2
  | `Dispatch (d1,b1) ->
      let (code1,r1) = run_dispatcher d1 v1 in
      run_disp_prod2 v1 r1 v v2 b1.(code1)

and run_disp_prod2 v1 r1 v v2 x =
  match x with
  | `None -> assert false
  | `Ignore r -> make_result_prod v1 r1 v2 dummy_r v r
  | `TailCall d2 -> run_dispatcher d2 v2
  | `Dispatch (d2,b2) ->
      let (code2,r2) = run_dispatcher d2 v2 in
      make_result_prod v1 r1 v2 r2 v b2.(code2)
            
and run_disp_record f v bindings fields other = function
  | None -> assert false
  | Some record -> run_disp_record' f v bindings fields other record

and run_disp_record' f v bindings fields other = function
  | `Result r ->
      make_result_record f v bindings r
  | `Result_other (_,r1,r2) -> 
      let other = other || fields <> [] in
      make_result_record f v bindings (if other then r1 else r2)
  | `Label (l, present, absent) ->
      let rec aux other = function
        | (l1,_) :: rem when l1 < l -> aux true rem
        | (l1,vl) :: rem when l1 = l -> 
            run_disp_field f v bindings rem other l vl present
        | _ -> run_disp_record f v bindings fields other absent
      in
      aux other fields

and run_disp_field f v bindings fields other l vl = function
  | `None -> assert false
  | `Ignore r -> run_disp_record' f v bindings fields other r
  | `TailCall d -> run_dispatcher d vl
  | `Dispatch (dl,bl) ->
      let (codel,rl) = run_dispatcher dl vl in
      run_disp_record' f v ((l,rl)::bindings) fields other bl.(codel)
1	(* Running dispatchers *)
2
3	(* TODO: remove `Absent and clean .... *)
4
5	open Value
6
7
8	let make_result_prod v1 r1 v2 r2 v (code,r) =
9	let ret = Array.map
10	(function
11	\| `Catch -> v
12	\| `Const c -> const c
13	\| `Left i -> if (i < 0) then v1 else r1.(i)
14	\| `Right j -> if (j < 0) then v2 else r2.(j)
15	\| `Recompose (i,j) ->
16	Pair ((if (i < 0) then v1 else r1.(i)),
17	(if (j < 0) then v2 else r2.(j)))
18	\| _ -> assert false
19	) r in
20	(code,ret)
21
22	let make_result_record fields v bindings (code,r) =
23	let ret = Array.map
24	(function
25	\| `Catch -> v
26	\| `Const c -> const c
27	\| `Field (l,i) ->
28	if (i < 0) then List.assoc l fields
29	else (List.assoc l bindings).(i)
30	\| _ -> assert false
31	) r in
32	(code,ret)
33
34	let make_result_basic v (code,r) =
35	let ret = Array.map
36	(function
37	\| `Catch -> v
38	\| `Const c -> const c
39	\| _ -> assert false
40	) r in
41	(code,ret)
42
43	let dummy_r = [\|\|]
44
45	let rec run_dispatcher d v =
46	let actions = Patterns.Compile.actions d in
47	match actions with
48	\| `Ignore r -> make_result_basic v r
49	\| `Kind k -> run_disp_kind k v
50
51	and run_disp_kind actions v =
52	match v with
53	\| Pair (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.prod
54	\| Xml (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.xml
55	\| Record r -> run_disp_record r v [] r false actions.Patterns.Compile.record
56	\| Atom a ->
57	run_disp_basic v (fun t -> Types.Atom.has_atom t a)
58	actions.Patterns.Compile.basic
59	\| Char c ->
60	run_disp_basic v (fun t -> Types.Char.has_char t c)
61	actions.Patterns.Compile.basic
62	\| Integer i ->
63	run_disp_basic v (fun t -> Types.Int.has_int t i)
64	actions.Patterns.Compile.basic
65	\| Abstraction (iface,_) ->
66	run_disp_basic v (fun t -> Types.Arrow.check_iface iface t)
67	actions.Patterns.Compile.basic
68	\| v ->
69	run_disp_kind actions (normalize v)
70
71
72	and run_disp_basic v f x =
73	match x with
74	\| [(_,r)] -> make_result_basic v r
75	\| (t,r)::rem -> if f t then make_result_basic v r else run_disp_basic v f rem
76	\| _ -> assert false
77
78
79	and run_disp_prod v v1 v2 x =
80	match x with
81	\| `None -> assert false
82	\| `TailCall d1 -> run_dispatcher d1 v1
83	\| `Ignore d2 -> run_disp_prod2 v1 dummy_r v v2 d2
84	\| `Dispatch (d1,b1) ->
85	let (code1,r1) = run_dispatcher d1 v1 in
86	run_disp_prod2 v1 r1 v v2 b1.(code1)
87
88	and run_disp_prod2 v1 r1 v v2 x =
89	match x with
90	\| `None -> assert false
91	\| `Ignore r -> make_result_prod v1 r1 v2 dummy_r v r
92	\| `TailCall d2 -> run_dispatcher d2 v2
93	\| `Dispatch (d2,b2) ->
94	let (code2,r2) = run_dispatcher d2 v2 in
95	make_result_prod v1 r1 v2 r2 v b2.(code2)
96
97	and run_disp_record f v bindings fields other = function
98	\| None -> assert false
99	\| Some record -> run_disp_record' f v bindings fields other record
100
101	and run_disp_record' f v bindings fields other = function
102	\| `Result r ->
103	make_result_record f v bindings r
104	\| `Result_other (_,r1,r2) ->
105	let other = other \|\| fields <> [] in
106	make_result_record f v bindings (if other then r1 else r2)
107	\| `Label (l, present, absent) ->
108	let rec aux other = function
109	\| (l1,_) :: rem when l1 < l -> aux true rem
110	\| (l1,vl) :: rem when l1 = l ->
111	run_disp_field f v bindings rem other l vl present
112	\| _ -> run_disp_record f v bindings fields other absent
113	in
114	aux other fields
115
116	and run_disp_field f v bindings fields other l vl = function
117	\| `None -> assert false
118	\| `Ignore r -> run_disp_record' f v bindings fields other r
119	\| `TailCall d -> run_dispatcher d vl
120	\| `Dispatch (dl,bl) ->
121	let (codel,rl) = run_dispatcher dl vl in
122	run_disp_record' f v ((l,rl)::bindings) fields other bl.(codel)