CristalCaveGem » LustreC

open Format

open Machine_code_types

open Lustre_types

open Corelang

open Machine_code_common

(** Exception for unsupported features in Ada backend **)

exception Ada_not_supported of string

(** All the pretty print functions common to the ada backend **)

(* Misc pretty print functions *)

(** Print a cleaned an identifier for ada exportation : Ada names must not start by an

    underscore and must not contain a double underscore

   @param var name to be cleaned*)

let pp_clean_ada_identifier fmt name =

  let base_size = String.length name in

  assert(base_size > 0);

  let rec remove_double_underscore s = function

    | i when i == String.length s - 1 -> s

    | i when String.get s i == '_' && String.get s (i+1) == '_' ->

        remove_double_underscore (sprintf "%s%s" (String.sub s 0 i) (String.sub s (i+1) (String.length s-i-1))) i

    | i -> remove_double_underscore s (i+1)

  in

  let name = remove_double_underscore name 0 in

  let prefix = if String.length name != base_size

                  || String.get name 0 == '_' then

                  "ada"

               else

                  ""

  in

  fprintf fmt "%s%s" prefix name

(* Package pretty print functions *)

(** Print the name of a package associated to a machine.

   @param fmt the formater to print on

   @param machine the machine

**)

let pp_package_name fmt node =

    fprintf fmt "%a" pp_clean_ada_identifier node.node_id

(** Print the ada package introduction sentence it can be used for body and

declaration. Boolean parameter body should be true if it is a body delcaration.

   @param fmt the formater to print on

   @param fmt the formater to print on

   @param machine the machine

**)

let pp_begin_package body fmt machine =

  fprintf fmt "package %s%a is"

    (if body then "body " else "")

    pp_package_name machine.mname

(** Print the ada package conclusion sentence.

   @param fmt the formater to print on

   @param machine the machine

**)

let pp_end_package fmt machine =

  fprintf fmt "end %a" pp_package_name machine.mname

(** Print the access of an item from an other package.

   @param fmt the formater to print on

   @param package the package to use

   @param item the item which is accessed

**)

let pp_package_access fmt (package, item) =

  fprintf fmt "%t.%t" package item

(** Print the name of the main procedure.

   @param fmt the formater to print on

   @param main_machine the machine associated to the main node

**)

let pp_main_procedure_name main_machine fmt =

  fprintf fmt "main"

(** Print the name of the main ada file.

   @param fmt the formater to print on

   @param main_machine the machine associated to the main node

**)

let pp_main_filename fmt main_machine =

  fprintf fmt "%t.adb" (pp_main_procedure_name main_machine)

(** Extract a node from an instance.

   @param instance the instance

**)

let extract_node instance =

  let (_, (node, _)) = instance in

  match node.top_decl_desc with

    | Node nd         -> nd

    | _ -> assert false (*TODO*)

(** Print a with statement to include a node.

   @param fmt the formater to print on

   @param node the node

**)

let pp_with_node fmt node =

  fprintf fmt "private with %a" pp_package_name node

(* Type pretty print functions *)

(** Print a type declaration

   @param fmt the formater to print on

   @param pp_name a format printer which print the type name

   @param pp_value a format printer which print the type definition

**)

let pp_type_decl fmt (pp_name, pp_definition) =

  fprintf fmt "type %t is %t" pp_name pp_definition

(** Print a private type declaration

   @param fmt the formater to print on

   @param pp_name a format printer which print the type name

**)

let pp_private_limited_type_decl fmt pp_name =

  let pp_definition fmt = fprintf fmt "limited private" in

  pp_type_decl fmt (pp_name, pp_definition)

(** Print the type of the state variable.

   @param fmt the formater to print on

**)

let pp_state_type fmt =

  (* Type and variable names live in the same environement in Ada so name of

     this type and of the associated parameter : pp_state_name must be

     different *)

  fprintf fmt "TState"

(** Print the integer type name.

   @param fmt the formater to print on

**)

let pp_integer_type fmt = fprintf fmt "Integer"

(** Print the float type name.

   @param fmt the formater to print on

**)

let pp_float_type fmt = fprintf fmt "Float"

(** Print the boolean type name.

   @param fmt the formater to print on

**)

let pp_boolean_type fmt = fprintf fmt "Boolean"

(** Print the type of a variable.

   @param fmt the formater to print on

   @param id the variable

**)

let pp_var_type fmt id =

  (match (Types.repr id.var_type).Types.tdesc with

    | Types.Tbasic Types.Basic.Tint -> pp_integer_type fmt

    | Types.Tbasic Types.Basic.Treal -> pp_float_type fmt

    | Types.Tbasic Types.Basic.Tbool -> pp_boolean_type fmt

    | _ -> eprintf "Type error : %a@." Types.print_ty id.var_type; assert false (*TODO*)

  )

(* Variable pretty print functions *)

(** Represent the possible mode for a type of a procedure parameter **)

type parameter_mode = NoMode | In | Out | InOut

(** Print a parameter_mode.

   @param fmt the formater to print on

   @param mode the modifier

**)

let pp_parameter_mode fmt mode =

  fprintf fmt "%s" (match mode with

                     | NoMode -> ""

                     | In     -> "in"

                     | Out    -> "out"

                     | InOut  -> "in out")

(** Print the name of the state variable.

   @param fmt the formater to print on

**)

let pp_state_name fmt =

  fprintf fmt "state"

(** Print the name of a variable.

   @param fmt the formater to print on

   @param id the variable

**)

let pp_var_name fmt id =

  fprintf fmt "%a" pp_clean_ada_identifier id.var_id

(** Print a variable declaration

   @param mode input/output mode of the parameter

   @param pp_name a format printer wich print the variable name

   @param pp_type a format printer wich print the variable type

   @param fmt the formater to print on

   @param id the variable

**)

let pp_var_decl fmt (mode, pp_name, pp_type) =

  fprintf fmt "%t: %a%s%t"

    pp_name

    pp_parameter_mode mode

    (if mode = NoMode then "" else " ")

    pp_type

(** Print variable declaration for machine variable

   @param mode input/output mode of the parameter

   @param fmt the formater to print on

   @param id the variable

**)

let pp_machine_var_decl mode fmt id =

  let pp_name = function fmt -> pp_var_name fmt id in

  let pp_type = function fmt -> pp_var_type fmt id in

  pp_var_decl fmt (mode, pp_name, pp_type)

(** Print variable declaration for state variable

   @param fmt the formater to print on

   @param mode input/output mode of the parameter

**)

let pp_state_var_decl fmt mode =

  let pp_name = pp_state_name in

  let pp_type = pp_state_type in

  pp_var_decl fmt (mode, pp_name, pp_type)

(** Print the declaration of a state element of node.

   @param instance name of the variable

   @param fmt the formater to print on

   @param instance node

**)

let pp_node_state_decl name fmt node =

  let pp_package fmt = pp_package_name fmt node in

  let pp_type fmt = pp_package_access fmt (pp_package, pp_state_type) in

  let pp_name fmt = pp_clean_ada_identifier fmt name in

  pp_var_decl fmt (NoMode, pp_name, pp_type)

(* Prototype pretty print functions *)

(** Print the name of the reset procedure **)

let pp_reset_procedure_name fmt = fprintf fmt "reset"

(** Print the name of the step procedure **)

let pp_step_procedure_name fmt = fprintf fmt "step"

(** Print the name of the init procedure **)

let pp_init_procedure_name fmt = fprintf fmt "init"

(** Print the name of the clear procedure **)

let pp_clear_procedure_name fmt = fprintf fmt "clear"

(** Print the prototype of a procedure with non input/outputs

   @param fmt the formater to print on

   @param name the name of the procedure

**)

let pp_simple_prototype pp_name fmt =

  fprintf fmt "procedure %t" pp_name

(** Print the prototype of a machine procedure. The first parameter is always

the state, state_modifier specify the modifier applying to it. The next

parameters are inputs and the last parameters are the outputs.

   @param state_mode the input/output mode for the state parameter

   @param input list of the input parameter of the procedure

   @param output list of the output parameter of the procedure

   @param fmt the formater to print on

   @param name the name of the procedure

**)

let pp_base_prototype state_mode input output fmt pp_name =

  fprintf fmt "procedure %t(@[<v>%a%t@[%a@]%t@[%a@])@]"

    pp_name

    pp_state_var_decl state_mode

    (Utils.pp_final_char_if_non_empty ";@," input)

    (Utils.fprintf_list ~sep:";@ " (pp_machine_var_decl In)) input

    (Utils.pp_final_char_if_non_empty ";@," output)

    (Utils.fprintf_list ~sep:";@ " (pp_machine_var_decl Out)) output

(** Print the prototype of the step procedure of a machine.

   @param m the machine

   @param fmt the formater to print on

   @param pp_name name function printer

**)

let pp_step_prototype m fmt =

  pp_base_prototype InOut m.mstep.step_inputs m.mstep.step_outputs fmt pp_step_procedure_name

(** Print the prototype of the reset procedure of a machine.

   @param m the machine

   @param fmt the formater to print on

   @param pp_name name function printer

**)

let pp_reset_prototype m fmt =

  pp_base_prototype InOut m.mstatic [] fmt pp_reset_procedure_name

(** Print the prototype of the init procedure of a machine.

   @param m the machine

   @param fmt the formater to print on

   @param pp_name name function printer

**)

let pp_init_prototype m fmt =

  pp_base_prototype Out m.mstatic [] fmt pp_init_procedure_name

(** Print the prototype of the clear procedure of a machine.

   @param m the machine

   @param fmt the formater to print on

   @param pp_name name function printer

**)

let pp_clear_prototype m fmt =

  pp_base_prototype InOut m.mstatic [] fmt pp_clear_procedure_name

(* Procedure pretty print functions *)

(** Print the definition of a procedure

   @param pp_name the procedure name printer

   @param pp_prototype the prototype printer

   @param pp_instr local var printer

   @param pp_instr instruction printer

   @param fmt the formater to print on

   @param locals locals var list

   @param instrs instructions list

**)

let pp_procedure_definition pp_name pp_prototype pp_local pp_instr fmt (locals, instrs) =

  fprintf fmt "@[<v>%t is%t@[<v>%a%t@]@,begin@,  @[<v>%a%t@]@,end %t@]"

    pp_prototype

    (Utils.pp_final_char_if_non_empty "@,  " locals)

    (Utils.fprintf_list ~sep:";@," pp_local) locals

    (Utils.pp_final_char_if_non_empty ";" locals)

    (Utils.fprintf_list ~sep:";@," pp_instr) instrs

    (Utils.pp_final_char_if_non_empty ";" instrs)

    pp_name