CristalCaveGem » LustreC

open Lustre_types

open Machine_code_types

open Corelang

let print_statelocaltag = true

let is_memory m id =

  (List.exists (fun o -> o.var_id = id.var_id) m.mmemory) 

let rec pp_val m fmt v =

  let pp_val = pp_val m in

  match v.value_desc with

  | Cst c         -> Printers.pp_const fmt c 

  | Var v    ->

     if is_memory m v then

       if print_statelocaltag then

	 Format.fprintf fmt "%s(S)" v.var_id

       else

	 Format.pp_print_string fmt v.var_id 

     else     

       if print_statelocaltag then

	 Format.fprintf fmt "%s(L)" v.var_id

       else

	 Format.pp_print_string fmt v.var_id

  | Array vl      -> Format.fprintf fmt "[%a]" (Utils.fprintf_list ~sep:", " pp_val)  vl

  | Access (t, i) -> Format.fprintf fmt "%a[%a]" pp_val t pp_val i

  | Power (v, n)  -> Format.fprintf fmt "(%a^%a)" pp_val v pp_val n

  | Fun (n, vl)   -> Format.fprintf fmt "%s (%a)" n (Utils.fprintf_list ~sep:", " pp_val)  vl

let rec  pp_instr m fmt i =

 let     pp_val = pp_val m and

      pp_branch = pp_branch m in

  let _ =

    match i.instr_desc with

    | MLocalAssign (i,v) -> Format.fprintf fmt "%s<-l- %a" i.var_id pp_val v

    | MStateAssign (i,v) -> Format.fprintf fmt "%s<-s- %a" i.var_id pp_val v

    | MReset i           -> Format.fprintf fmt "reset %s" i

    | MNoReset i         -> Format.fprintf fmt "noreset %s" i

    | MStep (il, i, vl)  ->

       Format.fprintf fmt "%a = %s (%a)"

	 (Utils.fprintf_list ~sep:", " (fun fmt v -> Format.pp_print_string fmt v.var_id)) il

	 i

	 (Utils.fprintf_list ~sep:", " pp_val) vl

    | MBranch (g,hl)     ->

       Format.fprintf fmt "@[<v 2>case(%a) {@,%a@,}@]"

	 pp_val g

	 (Utils.fprintf_list ~sep:"@," pp_branch) hl

    | MComment s -> Format.pp_print_string fmt s

    | MSpec s -> Format.pp_print_string fmt ("@" ^ s)

  in

  (* Annotation *)

  (* let _ = *)

  (*   match i.lustre_expr with None -> () | Some e -> Format.fprintf fmt " -- original expr: %a" Printers.pp_expr e *)

  (* in *)

  let _ = 

    match i.lustre_eq with None -> () | Some eq -> Format.fprintf fmt " -- original eq: %a" Printers.pp_node_eq eq

  in

  ()

and pp_branch m fmt (t, h) =

  Format.fprintf fmt "@[<v 2>%s:@,%a@]" t (Utils.fprintf_list ~sep:"@," (pp_instr m)) h

and pp_instrs m fmt il =

  Format.fprintf fmt "@[<v 2>%a@]" (Utils.fprintf_list ~sep:"@," (pp_instr m)) il

(* merge log: get_node_def was in c0f8 *)

(* Returns the node/machine associated to id in m calls *)

let get_node_def id m =

  try

    let (decl, _) = List.assoc id m.mcalls in

    Corelang.node_of_top decl

  with Not_found -> ( 

    (* Format.eprintf "Unable to find node %s in list [%a]@.@?" *)

    (*   id *)

    (*   (Utils.fprintf_list ~sep:", " (fun fmt (n,_) -> Format.fprintf fmt "%s" n)) m.mcalls *)

    (* ; *)

    raise Not_found

  )

(* merge log: machine_vars was in 44686 *)

let machine_vars m = m.mstep.step_inputs @ m.mstep.step_locals @ m.mstep.step_outputs @ m.mmemory

let pp_step m fmt s =

  Format.fprintf fmt "@[<v>inputs : %a@ outputs: %a@ locals : %a@ checks : %a@ instrs : @[%a@]@ asserts : @[%a@]@]@ "

    (Utils.fprintf_list ~sep:", " Printers.pp_var) s.step_inputs

    (Utils.fprintf_list ~sep:", " Printers.pp_var) s.step_outputs

    (Utils.fprintf_list ~sep:", " Printers.pp_var) s.step_locals

    (Utils.fprintf_list ~sep:", " (fun fmt (_, c) -> pp_val m fmt c)) s.step_checks

    (Utils.fprintf_list ~sep:"@ " (pp_instr m)) s.step_instrs

    (Utils.fprintf_list ~sep:", " (pp_val m)) s.step_asserts

let pp_static_call fmt (node, args) =

 Format.fprintf fmt "%s<%a>"

   (node_name node)

   (Utils.fprintf_list ~sep:", " Dimension.pp_dimension) args

let pp_machine fmt m =

  Format.fprintf fmt

    "@[<v 2>machine %s@ mem      : %a@ instances: %a@ init     : %a@ const    : %a@ step     :@   @[<v 2>%a@]@ @  spec : @[%t@]@  annot : @[%a@]@]@ "

    m.mname.node_id

    (Utils.fprintf_list ~sep:", " Printers.pp_var) m.mmemory

    (Utils.fprintf_list ~sep:", " (fun fmt (o1, o2) -> Format.fprintf fmt "(%s, %a)" o1 pp_static_call o2)) m.minstances

    (Utils.fprintf_list ~sep:"@ " (pp_instr m)) m.minit

    (Utils.fprintf_list ~sep:"@ " (pp_instr m)) m.mconst

    (pp_step m) m.mstep

    (fun fmt -> match m.mspec with | None -> ()

                                   | Some (NodeSpec id) -> Format.fprintf fmt "cocospec: %s" id

                                   | Some (Contract spec) -> Printers.pp_spec fmt spec)

    (Utils.fprintf_list ~sep:"@ " Printers.pp_expr_annot) m.mannot

let pp_machines fmt ml =

  Format.fprintf fmt "@[<v 0>%a@]" (Utils.fprintf_list ~sep:"@," pp_machine) ml

let rec is_const_value v =

  match v.value_desc with

  | Cst _          -> true

  | Fun (id, args) -> Basic_library.is_value_internal_fun v && List.for_all is_const_value args

  | _              -> false

(* Returns the declared stateless status and the computed one. *)

let get_stateless_status m =

  (m.mname.node_dec_stateless,

   try

     Utils.desome m.mname.node_stateless

   with _ -> failwith ("stateless status of machine " ^ m.mname.node_id ^ " not computed"))

let is_stateless m = m.minstances = [] && m.mmemory = []

let is_input m id =

  List.exists (fun o -> o.var_id = id.var_id) m.mstep.step_inputs

let is_output m id =

  List.exists (fun o -> o.var_id = id.var_id) m.mstep.step_outputs

let mk_conditional ?lustre_eq c t e =

  mkinstr ?lustre_eq:lustre_eq  (MBranch(c, [ (tag_true, t); (tag_false, e) ]))

let mk_val v t =

  { value_desc = v; 

    value_type = t; 

    value_annot = None }

let arrow_machine =

  let state = "_first" in

  let var_state = dummy_var_decl state Type_predef.type_bool(* (Types.new_ty Types.Tbool) *) in

  let var_input1 = List.nth Arrow.arrow_desc.node_inputs 0 in

  let var_input2 = List.nth Arrow.arrow_desc.node_inputs 1 in

  let var_output = List.nth Arrow.arrow_desc.node_outputs 0 in

  let cst b = mk_val (Cst (const_of_bool b)) Type_predef.type_bool in

  assert(var_input1.var_type = var_input2.var_type);

  let t_arg = var_input1.var_type in (* TODO Xavier: c'est bien la bonne def ? Guillaume: Bof preferable de reprendre le type des variables non ? *)

  {

    mname = Arrow.arrow_desc;

    mmemory = [var_state];

    mcalls = [];

    minstances = [];

    minit = [mkinstr (MStateAssign(var_state, cst true))];

    mstatic = [];

    mconst = [];

    mstep = {

      step_inputs = Arrow.arrow_desc.node_inputs;

      step_outputs = Arrow.arrow_desc.node_outputs;

      step_locals = [];

      step_checks = [];

      step_instrs = [mk_conditional (mk_val (Var var_state) Type_predef.type_bool)

			(List.map mkinstr

			[MStateAssign(var_state, cst false);

			 MLocalAssign(var_output, mk_val (Var var_input1) t_arg)])

                        (List.map mkinstr

			[MLocalAssign(var_output, mk_val (Var var_input2) t_arg)]) ];

      step_asserts = [];

    };

    mspec = None;

    mannot = [];

    msch = None

  }

let empty_desc =

  {

    node_id = Arrow.arrow_id;

    node_type = Types.bottom;

    node_clock = Clocks.bottom;

    node_inputs= [];

    node_outputs= [];

    node_locals= [];

    node_gencalls = [];

    node_checks = [];

    node_asserts = [];

    node_stmts= [];

    node_dec_stateless = true;

    node_stateless = Some true;

    node_spec = None;

    node_annot = [];

    node_iscontract = false;

}

let empty_machine =

  {

    mname = empty_desc;

    mmemory = [];

    mcalls = [];

    minstances = [];

    minit = [];

    mstatic = [];

    mconst = [];

    mstep = {

      step_inputs = [];

      step_outputs = [];

      step_locals = [];

      step_checks = [];

      step_instrs = [];

      step_asserts = [];

    };

    mspec = None;

    mannot = [];

    msch = None

  }

let new_instance =

  let cpt = ref (-1) in

  fun callee tag ->

    begin

      let o =

	if Stateless.check_node callee then

	  node_name callee

	else

	  Printf.sprintf "ni_%d" (incr cpt; !cpt) in

      let o =

	if !Options.ansi && is_generic_node callee

	then Printf.sprintf "%s_inst_%d"

               o

               (incr cpt; !cpt)

	else o in

      o

    end

let get_machine_opt machines name =

  List.fold_left

    (fun res m ->

      match res with

      | Some _ -> res

      | None -> if m.mname.node_id = name then Some m else None)

    None machines

let get_machine machines node_name =

 try

    Utils.desome (get_machine_opt machines node_name) 

 with Utils.DeSome ->

   Format.eprintf "Unable to find machine %s in machines %a@.@?"

     node_name

     (Utils.fprintf_list ~sep:", " (fun fmt m -> Format.pp_print_string fmt m.mname.node_id)) machines

      ; assert false

let get_const_assign m id =

  try

    match get_instr_desc (List.find

	     (fun instr -> match get_instr_desc instr with

	     | MLocalAssign (v, _) -> v == id

	     | _ -> false)

	     m.mconst

    ) with

    | MLocalAssign (_, e) -> e

    | _                   -> assert false

  with Not_found -> assert false

let value_of_ident loc m id =

  (* is is a state var *)

  try

    let v = List.find (fun v -> v.var_id = id) m.mmemory

    in mk_val (Var v) v.var_type 

  with Not_found ->

    try (* id is a node var *)

      let v = get_node_var id m.mname

      in mk_val (Var v) v.var_type

  with Not_found ->

    try (* id is a constant *)

      let c = Corelang.var_decl_of_const (const_of_top (Hashtbl.find Corelang.consts_table id))

      in mk_val (Var c) c.var_type

    with Not_found ->

      (* id is a tag *)

      let t = Const_tag id

      in mk_val (Cst t) (Typing.type_const loc t)

(* type of internal fun used in dimension expression *)

let type_of_value_appl f args =

  if List.mem f Basic_library.arith_funs

  then (List.hd args).value_type

  else Type_predef.type_bool

let rec value_of_dimension m dim =

  match dim.Dimension.dim_desc with

  | Dimension.Dbool b         ->

     mk_val (Cst (Const_tag (if b then tag_true else tag_false))) Type_predef.type_bool

  | Dimension.Dint i          ->

     mk_val (Cst (Const_int i)) Type_predef.type_int

  | Dimension.Dident v        -> value_of_ident dim.Dimension.dim_loc m v

  | Dimension.Dappl (f, args) ->

     let vargs = List.map (value_of_dimension m) args

     in mk_val (Fun (f, vargs)) (type_of_value_appl f vargs) 

  | Dimension.Dite (i, t, e)  ->

     (match List.map (value_of_dimension m) [i; t; e] with

     | [vi; vt; ve] -> mk_val (Fun ("ite", [vi; vt; ve])) vt.value_type

     | _            -> assert false)

  | Dimension.Dlink dim'      -> value_of_dimension m dim'

  | _                         -> assert false

let rec dimension_of_value value =

  match value.value_desc with

  | Cst (Const_tag t) when t = tag_true  -> Dimension.mkdim_bool  Location.dummy_loc true

  | Cst (Const_tag t) when t = tag_false -> Dimension.mkdim_bool  Location.dummy_loc false

  | Cst (Const_int i)                             -> Dimension.mkdim_int   Location.dummy_loc i

  | Var v                                         -> Dimension.mkdim_ident Location.dummy_loc v.var_id

  | Fun (f, args)                                 -> Dimension.mkdim_appl  Location.dummy_loc f (List.map dimension_of_value args)

  | _                                             -> assert false

     let rec join_branches hl1 hl2 =

 match hl1, hl2 with

 | []          , _            -> hl2

 | _           , []           -> hl1

 | (t1, h1)::q1, (t2, h2)::q2 ->

   if t1 < t2 then (t1, h1) :: join_branches q1 hl2 else

   if t1 > t2 then (t2, h2) :: join_branches hl1 q2

   else (t1, List.fold_right join_guards h1 h2) :: join_branches q1 q2

and join_guards inst1 insts2 =

 match get_instr_desc inst1, List.map get_instr_desc insts2 with

 | _                   , []                               ->

   [inst1]

 | MBranch (x1, hl1), MBranch (x2, hl2) :: q when x1 = x2 ->

    mkinstr

      (* TODO on pourrait uniquement concatener les lustres de inst1 et hd(inst2) *)

      (MBranch (x1, join_branches (sort_handlers hl1) (sort_handlers hl2)))

   :: (List.tl insts2)

 | _ -> inst1 :: insts2

let join_guards_list insts =

 List.fold_right join_guards insts []