(* Title: Pure/ML-Systems/alice.ML
ID: $Id$
Compatibility file for Alice 1.4 (CVS version).
val ml_system = "alice";
use "ML-Systems/alice.ML";
*)
fun exit 0 = (OS.Process.exit OS.Process.success): unit
| exit _ = OS.Process.exit OS.Process.failure;
(** ML system related **)
(*low-level pointer equality*)
fun pointer_eq (_: 'a, _: 'a) = false;
(* restore old-style character / string functions *)
exception Ord;
fun ord "" = raise Ord
| ord s = Char.ord (String.sub (s, 0));
val chr = String.str o chr;
val explode = map String.str o String.explode;
val implode = String.concat;
(* Poly/ML emulation *)
fun quit () = exit 0;
fun print_depth n = Print.depth := n;
(* compiler-independent timing functions *)
structure Timer =
struct
open Timer;
type cpu_timer = unit;
fun startCPUTimer () = ();
fun checkCPUTimer () = {sys = Time.zeroTime, usr = Time.zeroTime};
fun checkGCTime () = Time.zeroTime;
end;
fun start_timing () =
let val CPUtimer = Timer.startCPUTimer();
val time = Timer.checkCPUTimer(CPUtimer)
in (CPUtimer,time) end;
fun end_timing (CPUtimer, {sys,usr}) =
let open Time (*...for Time.toString, Time.+ and Time.- *)
val {sys=sys2,usr=usr2} = Timer.checkCPUTimer(CPUtimer)
in "User " ^ toString (usr2-usr) ^
" All "^ toString (sys2-sys + usr2-usr) ^
" secs"
handle Time => ""
end;
fun check_timer timer =
let
val {sys, usr} = Timer.checkCPUTimer timer;
val gc = Timer.checkGCTime timer; (* FIXME already included in usr? *)
in (sys, usr, gc) end;
(*prompts*)
fun ml_prompts p1 p2 = ();
(*dummy implementation*)
fun profile (n: int) f x = f x;
(*dummy implementation*)
fun exception_trace f = f ();
(*dummy implementation*)
fun print x = x;
(* toplevel pretty printing (see also Pure/install_pp.ML) *)
fun make_pp path pprint = (path, pprint);
fun install_pp (path, pp) = ();
(* ML command execution *)
fun use_text name (print, err) verbose txt = (Compiler.eval txt; ());
fun use_file _ _ name = use name;
(** interrupts **)
exception Interrupt;
fun ignore_interrupt f x = f x;
fun raise_interrupt f x = f x;
(* basis library fixes *)
structure TextIO =
struct
open TextIO;
fun inputLine is =
(case TextIO.inputLine is of
SOME str => str
| NONE => "")
handle IO.Io _ => raise Interrupt;
end;
(* bounded time execution *)
(*dummy implementation*)
fun interrupt_timeout time f x =
f x;
(** 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;
(*plain version; with return code*)
val system = OS.Process.system: string -> int;
structure OS =
struct
open OS;
structure FileSys =
struct
fun fileId name =
(case execute ("perl -e '@_ = stat(q:" ^ name ^ ":); print $_[1]'") of
"" => raise Fail "OS.FileSys.fileId" (* FIXME IO.Io!? *)
| s => (case Int.fromString s of NONE => raise Fail "OS.FileSys.fileId" | SOME i => i));
val compare = Int.compare;
open FileSys;
end;
end;
(* getenv *)
fun getenv var =
(case OS.Process.getEnv var of
NONE => ""
| SOME txt => txt);