src/ast_to_c.ml

@@ -84,8 +84,6 @@ let rec pp_asnprevarlist node_name fmt : t_varlist -> unit = function
 
 let reset_expressions_counter = ref 0;;
 
-let outputs = ref [];;
-
 let pp_expression node_name =
   let rec pp_expression_aux fmt expression =
     let rec pp_expression_list fmt exprs =
@@ -189,27 +187,10 @@ let pp_expression node_name =
     in
   pp_expression_aux
 
-(* deterministic *)
-let nodes_outputs = Hashtbl.create Config.maxvar;;
-
-let prepend_output_aux node_name name =
-    "output_" ^ node_name ^ "_" ^ name
-
-let prepend_output output node_name =
-    match output with
-    | BVar name -> BVar (prepend_output_aux node_name name)
-    | IVar name -> IVar (prepend_output_aux node_name name)
-    | RVar name -> RVar (prepend_output_aux node_name name)
-
 let rec pp_equations node_name fmt: t_eqlist -> unit = function
   | [] -> ()
-  | ((l_types, vars), (EApp (r_types, node, exprs))) :: eqs when l_types <> [] -> Format.fprintf fmt "%a" (pp_equations node_name) ((([], []), (EApp (r_types, node, exprs))) :: ((l_types, vars), (ETuple (fst node.n_outputs, List.map (fun output -> EVar (fst node.n_outputs, prepend_output output node.n_name)) (snd node.n_outputs)))) :: eqs)
   | (([], []), (ETuple ([], []))) :: eqs -> Format.fprintf fmt "%a" (pp_equations node_name) eqs
   | ((l_type :: l_types, var :: vars), (ETuple (r_type :: r_types, expr :: exprs))) :: eqs -> Format.fprintf fmt "%a" (pp_equations node_name) ((([l_type], [var]), expr) :: ((l_types, vars), (ETuple (r_types, exprs))) :: eqs)
-  | (([], []), expr) :: eqs ->
-      Format.fprintf fmt "\t%a;\n%a"
-        (pp_expression node_name) expr
-        (pp_equations node_name) eqs
   | (patt, expr) :: eqs ->
       Format.fprintf fmt "\t%a = %a;\n%a"
         (pp_varlist Base) patt
@@ -221,31 +202,24 @@ let pp_resvars reset_expressions_counter =
     (* use the fact that any boolean and any integer can be encoded as a float, concerning integers [-2^(23+1) + 1; 2^(23+1) + 1] are correctly encoded (cf https://stackoverflow.com/a/53254438) *)
     Format.sprintf "float tmp_reset[%i], init[%i];" reset_expressions_counter reset_expressions_counter
 
-let pp_return node_name fmt outputs =
-    if node_name = "main" then
-    (Format.fprintf fmt "return %a;"
-    (pp_varlist Base) outputs)
-    else
-        Format.fprintf fmt "%s" (String.concat "\n\t" (List.map (fun output -> match output with | BVar name | IVar name | RVar name -> "output_" ^ node_name ^ "_" ^ name ^ " = " ^ name ^ ";") (snd outputs)))
-
+(* TODO: manage general outputs *)
 let pp_node fmt node =
     (* undefined behavior if the initial code uses a variable with name:
         - `init_{NODE_NAME}`
         - `tmp_reset_{int}`
         - `init_{int}`
-        - `pre_{NODE_NAME}_{VARIABLE}`
-        - `output_{NODE_NAME}_{VARIABLE}` *)
+        - `pre_{NODE_MAIN}_{VARIABLE}` *)
   reset_expressions_counter := 0;
   let _ = (pp_equations node.n_name) Format.str_formatter node.n_equations in
   reset_expressions_counter := 0;
-  Format.fprintf fmt "bool init_%s = true;\n\n%a\n\n%a\n\n%a\n\n%s\n\n%s %s(%a)\n{\n\t%a\n\n\t%a\n\n%a\n\n\tinit_%s = false;\n\n%a\n\n%a\n\n%a\n\n\t%a\n}\n"
+  Format.fprintf fmt "bool init_%s = true;\n\n%a\n\n%a\n\n%a\n\n%s\n\n%a %s(%a)\n{\n\t%a\n\n\t%a\n\n%a\n\tinit_%s = false;\n\n%a\n\n%a\n\n%a\n\n\treturn %a;\n}\n"
     node.n_name
     (* could avoid declaring unused variables *)
     (pp_prevarlist node.n_name) node.n_inputs
     (pp_prevarlist node.n_name) node.n_local_vars
     (pp_prevarlist node.n_name) node.n_outputs
     (pp_resvars !reset_expressions_counter)
-    (if node.n_name = "main" then "int" else "void")
+    pp_retvarlist node.n_outputs
     node.n_name
     (* could avoid newlines if they aren't used to seperate statements *)
     (pp_varlist Arg) node.n_inputs
@@ -256,7 +230,7 @@ let pp_node fmt node =
     (pp_asnprevarlist node.n_name) node.n_inputs
     (pp_asnprevarlist node.n_name) node.n_local_vars
     (pp_asnprevarlist node.n_name) node.n_outputs
-    (pp_return node.n_name) node.n_outputs
+    (pp_varlist Base) node.n_outputs
 
 let rec pp_nodes fmt nodes =
   match nodes with
@@ -264,24 +238,9 @@ let rec pp_nodes fmt nodes =
   | node :: nodes ->
     Format.fprintf fmt "%a\n%a" pp_node node pp_nodes nodes
 
-let rec load_outputs_from_vars node_name n_outputs =
-  match n_outputs with
-  | [] -> ()
-  | BVar n_output :: n_outputs
-  | IVar n_output :: n_outputs
-  | RVar n_output :: n_outputs ->
-    (if (not (List.mem n_output !outputs)) then outputs := (node_name ^ "_" ^ n_output) :: !outputs;); load_outputs_from_vars node_name n_outputs
-
-let rec load_outputs_from_nodes nodes =
-  match nodes with
-  | [] -> ()
-  | node :: nodes ->
-          (if node.n_name <> "main" then (load_outputs_from_vars node.n_name (snd node.n_outputs)); Hashtbl.add nodes_outputs node.n_name (snd node.n_outputs)); load_outputs_from_nodes nodes
-
 let ast_to_c fmt prog =
-  load_outputs_from_nodes prog;
   Format.fprintf fmt
     (* could verify that uses, possibly indirectly (cf `->` implementation), a boolean in the ast before including `<stdbool.h>` *)
-    "#include <stdbool.h>\n\n%s\n\n%a"
-    ("float " ^ (String.concat ", " (List.map (fun output -> "output_" ^ output) !outputs)) ^ ";") pp_nodes prog
+    "#include <stdbool.h>\n\n%a"
+    pp_nodes prog