(*  Title:      Pure/ML-Systems/polyml-5.1.ML

     ID:         $Id$

 Compatibility wrapper for Poly/ML 5.1.

 *)

 use "ML-Systems/polyml.ML";

 use "ML-Systems/multithreading_polyml.ML";

 val pointer_eq = PolyML.pointerEq;

 (* improved versions of use_text/file *)

 fun use_text name (print, err) verbose txt =

   let

     val in_buffer = ref (explode txt);

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

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

     val line_no = ref 1;

     fun line () = ! line_no;

     fun get () =

       (case ! in_buffer of

         [] => ""

       | c :: cs => (in_buffer := cs; if c = "\n" then line_no := ! line_no + 1 else (); c));

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

     fun exec () =

       (case ! in_buffer of

         [] => ()

       | _ => (PolyML.compilerEx (get, put, line, name) (); exec ()));

   in

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

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

   end;

 fun use_file output verbose name =

   let

     val instream = TextIO.openIn name;

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

   in use_text name output verbose txt end;