(* Title: Pure/ML-Systems/smlnj-0.93.ML
ID: $Id$
Author: Carsten Clasohm, TU Muenchen
Copyright 1996 TU Muenchen
Compatibility file for Standard ML of New Jersey version 0.93.
*)
(*needs the Basis Library emulation*)
use "basis.ML";
(** ML system related **)
(* New Jersey ML parameters *)
System.Control.Runtime.gcmessages := 0;
(* Poly/ML emulation *)
fun quit () = exit 0;
(*limit the printing depth -- divided by 2 for comparibility with Poly/ML*)
fun print_depth n =
(System.Control.Print.printDepth := n div 2;
System.Control.Print.printLength := n);
(* timing *)
(*Note start point for timing*)
fun startTiming() = System.Timer.start_timer();
(*Finish timing and return string*)
local
(*print microseconds, suppressing trailing zeroes*)
fun umakestring 0 = ""
| umakestring n =
chr (ord "0" + n div 100000) ^ umakestring (10 * (n mod 100000));
fun string_of_time (System.Timer.TIME {sec, usec}) =
makestring sec ^ "." ^ (if usec=0 then "0" else umakestring usec)
in
fun endTiming start =
let val nongc = System.Timer.check_timer(start)
and gc = System.Timer.check_timer_gc(start);
val both = System.Timer.add_time(nongc, gc)
in "Non GC " ^ string_of_time nongc ^
" GC " ^ string_of_time gc ^
" both "^ string_of_time both ^ " secs\n"
end
end;
(* prompts *)
fun ml_prompts p1 p2 = ();
(* toplevel pretty printing (see also Pure/install_pp.ML) *)
fun make_pp path pprint =
let
open System.PrettyPrint;
fun pp pps obj =
pprint obj
(add_string pps, begin_block pps INCONSISTENT,
fn wd => add_break pps (wd, 0), fn () => add_newline pps,
fn () => end_block pps);
in
(path, pp)
end;
fun install_pp (path, pp) = System.PrettyPrint.install_pp path pp;
(* ML command execution *)
fun use_text _ = System.Compile.use_stream o open_string;
(** 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 IO.execute,
but that function seems to be buggy in SML/NJ 0.93*)
fun execute command =
let
val tmp_name = "/tmp/isabelle-execute";
val is = (System.system (command ^ " > " ^ tmp_name); open_in tmp_name);
val result = input (is, 999999);
in
close_in is;
System.Unsafe.SysIO.unlink tmp_name;
result
end;
(* file handling *)
(*Get time of last modification; if file doesn't exist return an empty string*)
local
open System.Timer System.Unsafe.SysIO;
in
fun file_info "" = ""
| file_info name = makestring (mtime (PATH name)) handle _ => "";
end;
structure OS =
struct
structure FileSys =
struct
val chDir = System.Directory.cd;
val remove = System.Unsafe.SysIO.unlink;
val getDir = System.Directory.getWD;
end;
end;
(*redefine to flush its output immediately -- temporary patch suggested
by Kim Dam Petersen*) (* FIXME !? *)
val output = fn (s, t) => (output (s, t); flush_out s);
(* getenv *)
local
fun drop_last [] = []
| drop_last [x] = []
| drop_last (x :: xs) = x :: drop_last xs;
val drop_last_char = implode o drop_last o explode;
in
fun getenv var = drop_last_char
(execute ("env | grep '^" ^ var ^ "=' | sed -e 's/" ^ var ^ "=//'"));
end;
(* non-ASCII input (see also Thy/use.ML) *)
val needs_filtered_use = false;