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

     ID:         $Id$

 Compatibility wrapper for Poly/ML (after 5.1).

 *)

 use "ML-Systems/polyml_common.ML";

 use "ML-Systems/multithreading_polyml.ML";

 val pointer_eq = PolyML.pointerEq;

 (* single-threaded profiling *)

 local val profile_orig = profile in

 fun profile 0 f x = f x

   | profile n f x = NAMED_CRITICAL "profile" (fn () => profile_orig n f x);

 end;

 (* improved versions of use_text/file *)

 fun use_text (tune: string -> string) (line, name) (print, err) verbose txt =

   let

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

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

     fun output () = implode (rev (case ! out_buffer of "\n" :: cs => cs | cs => cs));

     val current_line = ref line;

     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;

     val _ =

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

         PolyML.compiler

           {getChar = get, putString = put, lineNumber = fn () => ! current_line, fileName = name,

             nameSpace = PolyML.globalNameSpace} ())

       handle exn => (err (output ()); raise exn);

   in

     if verbose then print (output ()) else ()

   end;

 fun use_file tune output verbose name =

   let

     val instream = TextIO.openIn name;

     val txt = TextIO.inputAll instream before TextIO.closeIn instream;

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