(* Title: Pure/ML-Systems/mlworks.ML
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1996 University of Cambridge
Compatibility file for MLWorks version 1.0r2 or later.
*)
(** ML system related **)
(* restore old-style character / string functions *)
fun ord s = Char.ord (String.sub (s, 0));
val chr = str o Char.chr;
val explode = (map str) o String.explode;
val implode = String.concat;
(* MLWorks parameters *)
MLWorks.Internal.Runtime.Event.stack_overflow_handler
(fn () => MLWorks.Internal.Runtime.Memory.max_stack_blocks :=
! MLWorks.Internal.Runtime.Memory.max_stack_blocks + 20);
(* Poly/ML emulation *)
(*To exit the system with an exit code -- an alternative to ^D *)
fun exit 0 = (OS.Process.exit OS.Process.success): unit
| exit _ = OS.Process.exit OS.Process.failure;
fun quit () = exit 0;
(*n.a.*)
fun print_depth n = ();
(*interface for toplevel pretty printers, see also Pure/install_pp.ML*)
(*n.a.*)
fun make_pp path pprint = ();
fun install_pp _ = ();
(** Compiler-independent timing functions **)
(*Note start point for timing*)
fun startTiming() =
let val CPUtimer = Timer.startCPUTimer();
val time = Timer.checkCPUTimer(CPUtimer)
in (CPUtimer,time) end;
(*Finish timing and return string*)
fun endTiming (CPUtimer, {gc,sys,usr}) =
let open Time (*...for Time.toString, Time.+ and Time.- *)
val {gc=gc2,sys=sys2,usr=usr2} = Timer.checkCPUTimer(CPUtimer)
in "User " ^ toString (usr2-usr) ^
" GC " ^ toString (gc2-gc) ^
" All "^ toString (sys2-sys + usr2-usr + gc2-gc) ^
" secs"
handle Time => ""
end;
(* ML command execution *)
(*Can one redirect 'use' directly to an instream?*)
fun use_strings strs =
let
val tmp_name = OS.FileSys.tmpName ();
val tmp_file = TextIO.openOut tmp_name;
in app (fn s => TextIO.output (tmp_file, s)) strs;
TextIO.closeOut tmp_file;
use tmp_name;
OS.FileSys.remove tmp_name
end;
(** OS related **)
(* system command execution *)
(*execute Unix command which doesn't take any input from stdin and
sends its output to stdout; could be done more easily by Unix.execute,
but that function doesn't use the PATH*)
fun execute command =
let
val tmp_name = OS.FileSys.tmpName ();
val is = (OS.Process.system (command ^ " > " ^ tmp_name); TextIO.openIn tmp_name);
val result = TextIO.inputAll is;
in
TextIO.closeIn is;
OS.FileSys.remove tmp_name;
result
end;
(* file handling *)
(*get time of last modification; if file doesn't exist return an empty string*)
fun file_info "" = "" (* FIXME !? *)
| file_info name = Time.toString (OS.FileSys.modTime name) handle _ => "";
(* getenv *)
fun getenv var =
(case OS.Process.getEnv var of
NONE => ""
| SOME txt => txt);
(* non-ASCII input (see also Thy/use.ML) *)
val needs_filtered_use = false;