ima_exe.ml 11.3 KB
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(*-----------------------------------------------------------------------
 ** Copyright (C) 2001, 2002 - Verimag.
 ** This file may only be copied under the terms of the GNU Library General
 ** Public License 
 **-----------------------------------------------------------------------
 **
 ** File: ima_exe.ml
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 ** Author: jahier@imag.fr
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 *)

(*------------------------------------------------------------------------*)

open Util
open Formula
open Env_state
open List
open Command_line_ima_exe

(*------------------------------------------------------------------------*)


let (options:Command_line_ima_exe.optionsT) = {
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  show_automata = false ;
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  user_seed = 0 ;
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  boot = false ;
  verbose = false
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}

(*------------------------------------------------------------------------*)

type rif_token = Genlex.token 
type rif_stream = Genlex.token Stream.t

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let rec (parse_ima_files : rif_stream -> string list list -> string list list) =
  fun stream sll -> 
    try (
      match (Stream.next stream) with
	  (Genlex.String str) -> parse_ima_files stream ([str]::sll)
	| (Genlex.Kwd "x")    -> 
	    ( match (sll, (Stream.next stream)) with
		  ((sl::tail), (Genlex.String str2)) -> 
		    parse_ima_files stream ((append sl [str2])::tail)  
		| _ -> 
		    failwith "### parse error.\n" 
	    )
	| _  -> failwith "### parse error. A string (wrapped with double quotes) or `x' was expected. \n"  
    )
    with Stream.Failure -> 
      sll

(* Dynamically change the current env automata *)
let (replace_env_dynamically: rif_stream -> unit) =
  fun stream -> 
    let ima_files = parse_ima_files stream [] in
      Env_state.clear_ima ();
      output_string stderr "loading ";
      List.iter (fun x -> output_string stderr (x ^ " ")) (List.flatten ima_files);
      output_string stderr "  ...\n  ";
      Env_state.read_env_state ima_files;
      output_string stderr "  ...  ok\n";      
      Env_state.set_output_var_names (Env_state.out_env_unsorted ()) ;
      if options.show_automata then (
	Show_env.generate_env_graph (flatten (Env_state.current_nodes ())) [] 
		("automata" ^ (string_of_int (Hashtbl.hash Sys.argv))) 
		(Env_state.graph ()) ;
      ) ;

      print_string "#inputs ";
      List.iter 
	(fun (vn,vt) -> 
	   print_string (vn ^ ":" ^ (var_type_to_string2 vt) ^ " ")
	) 
	(Env_state.out_env_unsorted ());
      print_string "\n";

      flush stdout;
      flush stderr
	

(*------------------------------------------------------------------------*)
(* RIF parsing *)

let lexer = Genlex.make_lexer ["#"; "x"; "load_ima"; "#@"; "@#"]
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let rif_pragmas = ["inputs"]

(* Which pragmas should be defined ? *)
(* let rif_pragmas = ["outs";"outputs";"program";"inputs";"step";"reset"] *)

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let rec (read_rif_input : vnt list -> env_in) =
  fun vntl -> 
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    (** Reads the environment input values on stdin. It should
      follow the rif format. *)
    let tbl = Hashtbl.create (List.length vntl) in
      if vntl = []
      then tbl
      else 
	let line = read_line () in
	let stream = lexer(Stream.of_string line) in
	  parse_rif_stream vntl stream tbl
	    
and (parse_rif_stream : vnt list -> rif_stream -> env_in -> env_in) =
  fun vntl stream tbl -> 
    if vntl = []
    then tbl
    else 
      let tok_list = Stream.npeek 2 stream in
	match tok_list with 
	  | [Genlex.Kwd "#"; Genlex.Ident id] ->
	      if List.mem id rif_pragmas
	      then 
		(
		  Stream.junk stream ;
		  Stream.junk stream ; 
		  parse_rif_stream vntl stream tbl
		)
	      else
		(* We skip everything that occurs after a [#] not followed by a
		   member of [rif_pragmas], until the next eol. *)
		(
		  Stream.junk stream ; 
		  parse_rif_stream vntl (lexer (Stream.of_string (read_line ()))) tbl
		)

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	  | [Genlex.Kwd "#" ; Genlex.Kwd "load_ima"]
	      (* dynamically change the environment *)
	    ->
	      (
		Stream.junk stream ; 
		Stream.junk stream ; 
		replace_env_dynamically stream;
		parse_rif_stream (Env_state.in_env_unsorted ()) (lexer (Stream.of_string (read_line ()))) tbl
	      )

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	  | (Genlex.Kwd "#")::_ 
	      (* Ditto *)
	    ->
	      Stream.junk stream ; 
	      parse_rif_stream vntl (lexer (Stream.of_string (read_line ()))) tbl
		
	  | (Genlex.Kwd "#@")::_ ->
	      (* Beginning of multi-line comment. Note that here,
		 unlike the rif format, we ignore multi line pragmas;
		 namely, we handle them as a lusti-line comment. *)
	      (
		Stream.junk stream ;
		ignore_toks_until_end_of_pragmas vntl stream tbl
	      ) 

	  | (Genlex.Float f)::_ ->
	      (
		Stream.junk stream ;
		Hashtbl.add tbl (fst (hd vntl)) (N(F(f))) ;
		parse_rif_stream (tl vntl) stream tbl
	      )

	  | (Genlex.Int i)::_ ->
	      (
		Stream.junk stream ;
		if ((var_type_to_string (snd (hd vntl))) = "bool")
		then 
		  if i = 0 
		  then Hashtbl.add tbl (fst (hd vntl)) (B(false))
		  else Hashtbl.add tbl (fst (hd vntl)) (B(true))
		else Hashtbl.add tbl (fst (hd vntl)) (N(I(i))) ;
		parse_rif_stream (tl vntl) stream tbl
	      )
	      
	  | (Genlex.Ident b)::_ ->
	      (
		Stream.junk stream ;
		if mem b ["f"; "F";"false"]
		then Hashtbl.add tbl (fst (hd vntl)) (B(false))
		else if  mem b ["t"; "T";"true"]
		    then Hashtbl.add tbl (fst (hd vntl)) (B(true))
		else 
		  failwith ("### parse error. " ^ b ^ " is unknown \n") ;
		
		parse_rif_stream (tl vntl) stream tbl
	      )
	      
	  | [] -> 
	      (* Eol is is reached; proceed with the next one *)
	      parse_rif_stream vntl (lexer (Stream.of_string (read_line ()))) tbl

	  | _ -> failwith ("### parse error.\n")
	      
and (ignore_toks_until_end_of_pragmas : vnt list -> rif_stream -> env_in 
       -> env_in) =
  fun vntl stream tbl -> 
    (* ignore all tokens until "@#" is reached *)
    let tok_opt = Stream.peek stream in
      match tok_opt  with
	| Some(Genlex.Kwd "@#") ->
	    (
	      Stream.junk stream ;
	      parse_rif_stream vntl stream tbl
	    )
	| Some(_) ->
	    (
	      Stream.junk stream ;
	      ignore_toks_until_end_of_pragmas vntl stream tbl 
	    )
	| None -> 
	    (* Eol is is reached; proceed with the next one *)
	    ignore_toks_until_end_of_pragmas vntl 
	    (lexer (Stream.of_string (read_line ()))) tbl
	    
    
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let (write_rif_output : vnt list -> env_out -> unit) =
  fun vntl output -> 
    let ae_l = List.map (fun (vn, _) -> List.assoc vn output) vntl in
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      List.iter (print_var_value stdout) ae_l
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(*------------------------------------------------------------------------*)

let arg_nb = (Array.length Sys.argv) 

external random_seed: unit -> int = "sys_random_seed";;

let rec (main : unit -> 'a) =
  fun _ ->
    try
      if (arg_nb < 2) 
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      then output_string stderr usage 
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      else
	main2 ()
    with 
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	Failure(errmsg) -> output_string stderr errmsg
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      | e -> raise e	

and 
  (get_ima_exe_options: int -> int) =
  fun n -> 
    try 
      begin
	let opt = List.assoc Sys.argv.(n) Command_line_ima_exe.string_to_option in
	  match opt with
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	      ShowAut -> options.show_automata <- true ; (n+1)
	    | NoShowAut -> options.show_automata <- false ; (n+1)
	    | Boot -> options.boot <- true ; (n+1)
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	    | Verbose  -> options.verbose <- true ; (n+1)
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	    | Seed ->
		let str = (Sys.argv.(n+1)) in
		  options.user_seed <- cmd_line_string_to_int str 
		    ("*** Error when calling ima_exe: an " ^
		     "integer is expected after the " ^
		     "option --with-seed\n") ;
		  n+2
      end
    with Not_found -> n
and
  (get_env_from_args: int -> string list list -> string list list) =
  fun n file_ll -> 
    (** Returns the environment file names given at top-level into a
      list of list.  E.g., if the call [ima_exe env1 x env2 x env3
      env4] is done, then [get_env_from_args 10 []] (where 10 is the
      arg nb) returns [[["env1"; "env2"; "env3"]; ["env4"]]].

      Also set the command line options if any.  *)
    if (n = arg_nb) then file_ll
    else
      let m = get_ima_exe_options n in
	(* m > n iff Sys.argv.(n) is an option *)
	if 
	  (m > n) 
	then 
	  get_env_from_args m file_ll
	else
	  let arg = Sys.argv.(m) in
	    if 
	      (arg = "x") 
	    then
	      match file_ll with
		  sl::sll -> 
		    let env = Sys.argv.(n+1) in
                      get_env_from_args (n+2) ((env::sl)::sll)
		| []  -> assert false
	    else 
	      get_env_from_args (n+1) ([arg]::file_ll)
and
  (main2 : unit -> 'a) =
  fun _ -> 
    (* Initialisation of `Env_state.env_state' *)
    let env_llist = (get_env_from_args 1 []) in
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    let () = Env_state.read_env_state env_llist in
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    (* Initialisation of the random engine *)
    let seed = 
      if (options.user_seed = 0)
      then (random_seed ())
      else  options.user_seed
    in
      Random.init seed ;
      print_string "#The random engine was initialized with the seed ";
      print_int seed;
      print_string "\n ";
      flush stdout ;      


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      if options.show_automata then (
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	Show_env.generate_env_graph (flatten (Env_state.current_nodes ())) [] 
		("automata" ^ (string_of_int (Hashtbl.hash Sys.argv))) 
		(Env_state.graph ()) ;
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	Util.gv ("automata" ^ (string_of_int (Hashtbl.hash Sys.argv)) ^ ".ps")
      ) ;

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      Env_state.set_output_var_names (Env_state.out_env_unsorted ()) ;
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      (* Initializing the solution number table *)
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      Env_state.set_sol_number 
	(Bdd.dtrue (Env_state.bdd_manager ())) (Util.one_sol, Util.zero_sol);
      Env_state.set_sol_number 
	(Bdd.dfalse (Env_state.bdd_manager ())) (Util.zero_sol, Util.one_sol);
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      print_string "#inputs ";
      List.iter 
	(fun (vn,vt) -> 
	   print_string (vn ^ ":" ^ (var_type_to_string2 vt) ^ " ")
	) 
	(Env_state.out_env_unsorted ());
      print_string "\n";
      flush stdout;

      if options.boot 
      then
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	let nll_call_out_loc_list = Env.env_try 1 1 (Hashtbl.create 0) in
	let (nll, call, out, loc) = 
	  match nll_call_out_loc_list with
	      [(nll, call, out, loc)] -> (nll, call, out, loc)
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	    | _ -> assert false
	in
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	  Env.env_step nll call out loc ;
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	  Env.update_pre (Env_state.input ()) (Env_state.output ()) (Env_state.local ()) ;
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	  write_rif_output (Env_state.out_env_unsorted ()) out ;
      else ();  

      main_loop 1 ;
      flush stdout

and
  main_loop t = 

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  let previous_nodes = (Env_state.current_nodes ()) in
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  let nl = List.flatten previous_nodes in
  let _ = 
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    if options.verbose then
      (
	List.iter  
	 (fun n -> output_string stderr ("current nodes:" ^ (string_of_int n) ^ "\n "))  
	 nl; 
	flush stderr
      ) ;
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    print_string ("\n# step " ^ (string_of_int t) ^ " (") ;
    if (List.length nl)  > 1
    then 
      (
	print_string "current nodes are ";
	List.iter 
	  (fun n -> print_string ((string_of_int n) ^ " ")) 
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	  nl
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      )
    else 
      (
	print_string "current node is ";
	print_string (string_of_int (List.hd nl))
      );
 
    print_string ("):\n") ;
    flush stdout 
  in
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  let input = read_rif_input (Env_state.in_env_unsorted ()) in
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  let nll_call_out_loc_list = Env.env_try 1 1 input in
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  let (nll, call, out, loc) = 
    match nll_call_out_loc_list with
	[(nll, call, out, loc)] -> (nll, call, out, loc)
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      | _ -> assert false
  in
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    Env.env_step nll call out loc ;
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    Env.update_pre (Env_state.input ()) (Env_state.output ()) (Env_state.local ()) ;
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    (* Inputs and pre vars may change at ech new step, therefore we need to clear
       that table. *)
    Env_state.clear_bdd () ;

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    write_rif_output (Env_state.out_env_unsorted ()) out ;
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    if options.show_automata then (
      Show_env.generate_env_graph (flatten (Env_state.current_nodes ()))
          [] ("automata" ^ (string_of_int (Hashtbl.hash Sys.argv))) 
	  (Env_state.graph ())
    );
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    main_loop (t+1) 
;;
      


main ();;