viewcvs.cgi/runtime/run_dispatch.ml

(* Running dispatchers *)

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 None fields other record

and run_disp_record' f v bindings abs 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)
  | `Absent -> run_disp_record f v bindings fields other abs
  | `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 abs 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 abs fields other l vl = function
  | `None -> assert false
  | `Ignore r -> run_disp_record' f v bindings abs 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) abs fields other bl.(codel)
1	abate	70	(* Running dispatchers *)
2
3			open Value
4
5
6			let make_result_prod v1 r1 v2 r2 v (code,r) =
7			let ret = Array.map
8			(function
9			\| `Catch -> v
10			\| `Const c -> const c
11			\| `Left i -> if (i < 0) then v1 else r1.(i)
12			\| `Right j -> if (j < 0) then v2 else r2.(j)
13			\| `Recompose (i,j) ->
14			Pair ((if (i < 0) then v1 else r1.(i)),
15			(if (j < 0) then v2 else r2.(j)))
16			\| _ -> assert false
17			) r in
18			(code,ret)
19
20			let make_result_record fields v bindings (code,r) =
21			let ret = Array.map
22			(function
23			\| `Catch -> v
24			\| `Const c -> const c
25			\| `Field (l,i) ->
26			if (i < 0) then List.assoc l fields
27			else (List.assoc l bindings).(i)
28			\| _ -> assert false
29			) r in
30			(code,ret)
31
32			let make_result_basic v (code,r) =
33			let ret = Array.map
34			(function
35			\| `Catch -> v
36			\| `Const c -> const c
37			\| _ -> assert false
38			) r in
39			(code,ret)
40
41			let dummy_r = [\|\|]
42
43			let rec run_dispatcher d v =
44			let actions = Patterns.Compile.actions d in
45			match actions with
46			\| `Ignore r -> make_result_basic v r
47			\| `Kind k -> run_disp_kind k v
48
49	abate	71	and run_disp_kind actions v =
50			match v with
51	abate	70	\| Pair (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.prod
52	abate	110	\| Xml (v1,v2) -> run_disp_prod v v1 v2 actions.Patterns.Compile.xml
53	abate	165	\| Record r -> run_disp_record r v [] r false actions.Patterns.Compile.record
54	abate	70	\| Atom a ->
55			run_disp_basic v (fun t -> Types.Atom.has_atom t a)
56			actions.Patterns.Compile.basic
57			\| Char c ->
58			run_disp_basic v (fun t -> Types.Char.has_char t c)
59			actions.Patterns.Compile.basic
60			\| Integer i ->
61			run_disp_basic v (fun t -> Types.Int.has_int t i)
62			actions.Patterns.Compile.basic
63			\| Abstraction (iface,_) ->
64			run_disp_basic v (fun t -> Types.Arrow.check_iface iface t)
65			actions.Patterns.Compile.basic
66			\| v ->
67			run_disp_kind actions (normalize v)
68
69
70	abate	71	and run_disp_basic v f x =
71			match x with
72	abate	70	\| [(_,r)] -> make_result_basic v r
73			\| (t,r)::rem -> if f t then make_result_basic v r else run_disp_basic v f rem
74			\| _ -> assert false
75
76
77	abate	71	and run_disp_prod v v1 v2 x =
78			match x with
79	abate	70	\| `None -> assert false
80			\| `TailCall d1 -> run_dispatcher d1 v1
81			\| `Ignore d2 -> run_disp_prod2 v1 dummy_r v v2 d2
82			\| `Dispatch (d1,b1) ->
83			let (code1,r1) = run_dispatcher d1 v1 in
84			run_disp_prod2 v1 r1 v v2 b1.(code1)
85
86	abate	71	and run_disp_prod2 v1 r1 v v2 x =
87			match x with
88	abate	70	\| `None -> assert false
89			\| `Ignore r -> make_result_prod v1 r1 v2 dummy_r v r
90			\| `TailCall d2 -> run_dispatcher d2 v2
91			\| `Dispatch (d2,b2) ->
92			let (code2,r2) = run_dispatcher d2 v2 in
93			make_result_prod v1 r1 v2 r2 v b2.(code2)
94
95	abate	165	and run_disp_record f v bindings fields other = function
96	abate	70	\| None -> assert false
97	abate	165	\| Some record -> run_disp_record' f v bindings None fields other record
98	abate	70
99	abate	165	and run_disp_record' f v bindings abs fields other = function
100			\| `Result r ->
101			make_result_record f v bindings r
102			\| `Result_other (r1,r2) ->
103			let other = other \|\| fields <> [] in
104			make_result_record f v bindings (if other then r1 else r2)
105			\| `Absent -> run_disp_record f v bindings fields other abs
106	abate	70	\| `Label (l, present, absent) ->
107	abate	165	let rec aux other = function
108			\| (l1,_) :: rem when l1 < l -> aux true rem
109	abate	70	\| (l1,vl) :: rem when l1 = l ->
110	abate	165	run_disp_field f v bindings abs rem other l vl present
111			\| _ -> run_disp_record f v bindings fields other absent
112	abate	70	in
113	abate	165	aux other fields
114	abate	70
115	abate	165	and run_disp_field f v bindings abs fields other l vl = function
116	abate	70	\| `None -> assert false
117	abate	165	\| `Ignore r -> run_disp_record' f v bindings abs fields other r
118	abate	70	\| `TailCall d -> run_dispatcher d vl
119			\| `Dispatch (dl,bl) ->
120			let (codel,rl) = run_dispatcher dl vl in
121	abate	165	run_disp_record' f v ((l,rl)::bindings) abs fields other bl.(codel)