1 files changed, 112 insertions, 0 deletions
diff --git a/contrib/dp/dp_cvcl.ml b/contrib/dp/dp_cvcl.ml
new file mode 100644
index 00000000..05d43081
--- /dev/null
+++ b/contrib/dp/dp_cvcl.ml
@@ -0,0 +1,112 @@
+
+open Format
+open Fol
+
+let rec print_list sep print fmt = function
+  | [] -> ()
+  | [x] -> print fmt x
+  | x :: r -> print fmt x; sep fmt (); print_list sep print fmt r
+
+let space fmt () = fprintf fmt "@ "
+let comma fmt () = fprintf fmt ",@ "
+
+let rec print_term fmt = function
+  | Cst n -> 
+      fprintf fmt "%d" n
+  | Plus (a, b) ->
+      fprintf fmt "@[(%a@ +@ %a)@]" print_term a print_term b
+  | Moins (a, b) ->
+      fprintf fmt "@[(%a@ -@ %a)@]" print_term a print_term b
+  | Mult (a, b) ->
+      fprintf fmt "@[(%a@ *@ %a)@]" print_term a print_term b
+  | Div (a, b) ->
+      fprintf fmt "@[(%a@ /@ %a)@]" print_term a print_term b
+  | App (id, []) ->
+      fprintf fmt "@[%s@]" id
+  | App (id, tl) ->
+      fprintf fmt "@[%s(%a)@]" id print_terms tl
+
+and print_terms fmt tl = 
+  print_list comma print_term fmt tl
+
+let rec print_predicate fmt p = 
+  let pp = print_predicate in 
+  match p with
+  | True ->
+      fprintf fmt "TRUE"
+  | False ->
+      fprintf fmt "FALSE"
+  | Fatom (Eq (a, b)) ->
+      fprintf fmt "@[(%a = %a)@]" print_term a print_term b
+  | Fatom (Le (a, b)) ->
+      fprintf fmt "@[(%a@ <= %a)@]" print_term a print_term b
+  | Fatom (Lt (a, b))->
+      fprintf fmt "@[(%a@ < %a)@]" print_term a print_term b
+  | Fatom (Ge (a, b)) ->
+      fprintf fmt "@[(%a@ >= %a)@]" print_term a print_term b
+  | Fatom (Gt (a, b)) ->
+      fprintf fmt "@[(%a@ > %a)@]" print_term a print_term b
+  | Fatom (Pred (id, [])) ->
+      fprintf fmt "@[%s@]" id
+  | Fatom (Pred (id, tl)) ->
+      fprintf fmt "@[%s(%a)@]" id print_terms tl
+  | Imp (a, b) ->
+      fprintf fmt "@[(%a@ => %a)@]" pp a pp b
+  | And (a, b) ->
+      fprintf fmt "@[(%a@ AND@ %a)@]" pp a pp b
+  | Or (a, b) ->
+      fprintf fmt "@[(%a@ OR@ %a)@]" pp a pp b
+  | Not a ->
+      fprintf fmt "@[(NOT@ %a)@]" pp a
+  | Forall (id, t, p) -> 
+      fprintf fmt "@[(FORALL (%s:%s): %a)@]" id t pp p
+  | Exists (id, t, p) -> 
+      fprintf fmt "@[(EXISTS (%s:%s): %a)@]" id t pp p
+
+let rec string_of_type_list  = function
+  | [] -> assert false
+  | [e] -> e
+  | e :: l' -> e ^ ", " ^ (string_of_type_list l')
+
+let print_query fmt (decls,concl) =
+  let print_decl = function
+    | DeclVar (id, [], t) ->
+	fprintf fmt "@[%s: %s;@]@\n" id t
+    | DeclVar (id, [e], t) ->
+	fprintf fmt "@[%s: [%s -> %s];@]@\n"
+	  id e t
+    | DeclVar (id, l, t) ->
+	fprintf fmt "@[%s: [[%s] -> %s];@]@\n"
+	  id (string_of_type_list l) t
+    | DeclPred (id, []) ->
+	fprintf fmt "@[%s: BOOLEAN;@]@\n" id
+     | DeclPred (id, [e]) ->
+	fprintf fmt "@[%s: [%s -> BOOLEAN];@]@\n"
+	  id e
+   | DeclPred (id, l) ->
+	fprintf fmt "@[%s: [[%s] -> BOOLEAN];@]@\n"
+	  id (string_of_type_list l)
+    | DeclType id ->
+	fprintf fmt "@[%s: TYPE;@]@\n" id
+    | Assert (id, f)  -> 
+	fprintf fmt "@[ASSERT %% %s@\n %a;@]@\n" id print_predicate f
+  in
+  List.iter print_decl decls;
+  fprintf fmt "QUERY %a;" print_predicate concl
+
+let call q = 
+  let f = Filename.temp_file "coq_dp" ".cvc" in
+  let c = open_out f in
+  let fmt = formatter_of_out_channel c in
+  fprintf fmt "@[%a@]@." print_query q;
+  close_out c;
+  ignore (Sys.command (sprintf "cat %s" f));
+  let cmd = 
+    sprintf "timeout 10 cvcl < %s > out 2>&1 && grep -q -w Valid out" f
+  in
+  prerr_endline cmd; flush stderr;
+  let out = Sys.command cmd in
+  if out = 0 then Valid else if out = 1 then Invalid else Timeout
+  (* TODO: effacer le fichier f et le fichier out *)
+
+