src/Pure/ML-Systems/alice.ML
author wenzelm
Tue Jul 17 22:48:39 2007 +0200 (2007-07-17)
changeset 23835 1990e9acc7d1
parent 23826 463903573934
child 23921 947152add153
permissions -rw-r--r--
tuned comment;
     1 (*  Title:      Pure/ML-Systems/alice.ML
     2     ID:         $Id$
     3 
     4 Compatibility file for Alice 1.4.
     5 
     6 NOTE: there is no wrapper script; may run it interactively as follows:
     7 
     8 $ cd Isabelle/src/Pure
     9 $ env ALICE_JIT_MODE=0 alice
    10 - val ml_system = "alice";
    11 - use "ML-Systems/alice.ML";
    12 - use "ROOT.ML";
    13 - Session.finish ();
    14 *)
    15 
    16 fun exit 0 = (OS.Process.exit OS.Process.success): unit
    17   | exit _ = OS.Process.exit OS.Process.failure;
    18 
    19 
    20 (** ML system related **)
    21 
    22 (*low-level pointer equality*)
    23 fun pointer_eq (_: 'a, _: 'a) = false;
    24 
    25 
    26 (* restore old-style character / string functions *)
    27 
    28 exception Ord;
    29 fun ord "" = raise Ord
    30   | ord s = Char.ord (String.sub (s, 0));
    31 
    32 val chr = String.str o chr;
    33 val explode = map String.str o String.explode;
    34 val implode = String.concat;
    35 
    36 
    37 (* Poly/ML emulation *)
    38 
    39 fun quit () = exit 0;
    40 
    41 fun print_depth n = Print.depth := n;
    42 
    43 
    44 (* compiler-independent timing functions *)
    45 
    46 structure Timer =
    47 struct
    48   open Timer;
    49   type cpu_timer = unit;
    50   fun startCPUTimer () = ();
    51   fun checkCPUTimer () = {sys = Time.zeroTime, usr = Time.zeroTime};
    52   fun checkGCTime () = Time.zeroTime;
    53 end;
    54 
    55 fun start_timing () =
    56   let val CPUtimer = Timer.startCPUTimer();
    57       val time = Timer.checkCPUTimer(CPUtimer)
    58   in  (CPUtimer,time)  end;
    59 
    60 fun end_timing (CPUtimer, {sys,usr}) =
    61   let open Time  (*...for Time.toString, Time.+ and Time.- *)
    62       val {sys=sys2,usr=usr2} = Timer.checkCPUTimer(CPUtimer)
    63   in  "User " ^ toString (usr2-usr) ^
    64       "  All "^ toString (sys2-sys + usr2-usr) ^
    65       " secs"
    66       handle Time => ""
    67   end;
    68 
    69 fun check_timer timer =
    70   let
    71     val {sys, usr} = Timer.checkCPUTimer timer;
    72     val gc = Timer.checkGCTime timer;    (* FIXME already included in usr? *)
    73   in (sys, usr, gc) end;
    74 
    75 
    76 (*prompts*)
    77 fun ml_prompts p1 p2 = ();
    78 
    79 (*dummy implementation*)
    80 fun profile (n: int) f x = f x;
    81 
    82 (*dummy implementation*)
    83 fun exception_trace f = f ();
    84 
    85 (*dummy implementation*)
    86 fun print x = x;
    87 
    88 
    89 (* toplevel pretty printing (see also Pure/install_pp.ML) *)
    90 
    91 fun make_pp path pprint = (path, pprint);
    92 fun install_pp (path, pp) = ();
    93 
    94 
    95 (* ML command execution *)
    96 
    97 fun use_text name (print, err) verbose txt = (Compiler.eval txt; ());
    98 
    99 fun use_file _ _ name = use name;
   100 
   101 
   102 
   103 (** interrupts **)
   104 
   105 exception Interrupt;
   106 
   107 fun ignore_interrupt f x = f x;
   108 fun raise_interrupt f x = f x;
   109 
   110 
   111 (* basis library fixes *)
   112 
   113 structure TextIO =
   114 struct
   115   open TextIO;
   116   fun inputLine is = TextIO.inputLine is
   117     handle IO.Io _ => raise Interrupt;
   118 end;
   119 
   120 
   121 (* bounded time execution *)
   122 
   123 (*dummy implementation*)
   124 fun interrupt_timeout time f x =
   125   f x;
   126 
   127 
   128 
   129 (** OS related **)
   130 
   131 (* current directory *)
   132 
   133 val cd = OS.FileSys.chDir;
   134 val pwd = OS.FileSys.getDir;
   135 
   136 
   137 (* system command execution *)
   138 
   139 (*execute Unix command which doesn't take any input from stdin and
   140   sends its output to stdout; could be done more easily by Unix.execute,
   141   but that function doesn't use the PATH*)
   142 fun execute command =
   143   let
   144     val tmp_name = OS.FileSys.tmpName ();
   145     val is = (OS.Process.system (command ^ " > " ^ tmp_name); TextIO.openIn tmp_name);
   146     val result = TextIO.inputAll is;
   147   in
   148     TextIO.closeIn is;
   149     OS.FileSys.remove tmp_name;
   150     result
   151   end;
   152 
   153 (*plain version; with return code*)
   154 val system = OS.Process.system: string -> int;
   155 
   156 structure OS =
   157 struct
   158   open OS;
   159   structure FileSys =
   160   struct
   161     fun fileId name =
   162       (case execute ("perl -e '@_ = stat(q:" ^ name ^ ":); print $_[1]'") of
   163         "" => raise Fail "OS.FileSys.fileId"   (* FIXME IO.Io!? *)
   164       | s => (case Int.fromString s of NONE => raise Fail "OS.FileSys.fileId" | SOME i => i));
   165     val compare = Int.compare;
   166     open FileSys;
   167   end;
   168 end;
   169 
   170 
   171 (* getenv *)
   172 
   173 fun getenv var =
   174   (case OS.Process.getEnv var of
   175     NONE => ""
   176   | SOME txt => txt);