(*  Title:      Pure/ML-Systems/polyml.ML

 Compatibility wrapper for experimental versions of Poly/ML after 5.2.1.

 *)

 open Thread;

 use "ML-Systems/polyml_common.ML";

 use "ML-Systems/multithreading_polyml.ML";

 val pointer_eq = PolyML.pointerEq;

 fun share_common_data () = PolyML.shareCommonData PolyML.rootFunction;

 (* toplevel pretty printers *)

 (*dummy version*)

 fun make_pp path pprint = ();

 fun install_pp _ = ();

 (* runtime compilation *)

 structure ML_NameSpace =

 struct

   open PolyML.NameSpace;

   val global = PolyML.globalNameSpace;

 end;

 local

 fun drop_newline s =

   if String.isSuffix "\n" s then String.substring (s, 0, size s - 1)

   else s;

 in

 fun use_text (tune: string -> string) str_of_pos

     name_space (start_line, name) (print, err) verbose txt =

   let

     val current_line = ref start_line;

     val in_buffer = ref (String.explode (tune txt));

     val out_buffer = ref ([]: string list);

     fun output () = drop_newline (implode (rev (! out_buffer)));

     fun get () =

       (case ! in_buffer of

         [] => NONE

       | c :: cs =>

           (in_buffer := cs; if c = #"\n" then current_line := ! current_line + 1 else (); SOME c));

     fun put s = out_buffer := s :: ! out_buffer;

     fun put_message {message, hard, location = {startLine = line, ...}, context} =

      (put (if hard then "Error: " else "Warning: ");

       PolyML.prettyPrint (put, 76) message;

       put (str_of_pos line name ^ "\n"));

     val parameters =

      [PolyML.Compiler.CPOutStream put,

       PolyML.Compiler.CPLineNo (fn () => ! current_line),

       PolyML.Compiler.CPErrorMessageProc put_message,

       PolyML.Compiler.CPNameSpace name_space,

       PolyML.Compiler.CPPrintInAlphabeticalOrder false];

     val _ =

       (while not (List.null (! in_buffer)) do

         PolyML.compiler (get, parameters) ())

       handle exn =>

        (put ("Exception- " ^ General.exnMessage exn ^ " raised");

         err (output ()); raise exn);

   in if verbose then print (output ()) else () end;

 fun use_file tune str_of_pos name_space output verbose name =

   let

     val instream = TextIO.openIn name;

     val txt = Exn.release (Exn.capture TextIO.inputAll instream before TextIO.closeIn instream);

   in use_text tune str_of_pos name_space (1, name) output verbose txt end;

 end;