1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
:- object(msglog).
:- info([
version is 1.0,
author is 'Paulo Moura',
date is 2003/03/04,
comment is 'Monitor for recording, replaying, and saving user messages.']).
:- public(record/0).
:- mode(record, one).
:- info(record/0,
[comment is 'Starts recording messages.']).
:- public(stop/0).
:- mode(stop, one).
:- info(stop/0,
[comment is 'Stops recording messages.']).
:- public(replay/0).
:- mode(replay, one).
:- info(replay/0,
[comment is 'Replays all recorded messages.']).
:- public(print/0).
:- mode(print, one).
:- info(print/0,
[comment is 'Prints recorded messages, one per line.']).
:- public(erase/0).
:- mode(erase, one).
:- info(erase/0,
[comment is 'Erases recorded messages.']).
:- private(log_/2).
:- dynamic(log_/2).
:- mode(log_(+object, +nonvar), zero_or_more).
:- info(log_/2,
[comment is 'Table of recorded messages.',
argnames is ['Object', 'Message']]).
record :-
self(Self),
abolish_events(_, _, _, _, Self),
define_events(before, _, _, user, Self).
stop :-
self(Self),
abolish_events(_, _, _, _, Self).
replay :-
self(Self),
abolish_events(_, _, _, _, Self),
forall(::log_(Object, Message), {Object::Message}).
print :-
forall(
::log_(Object, Message),
(writeq(Object), write('::'), writeq(Message), write('.'), nl)).
erase :-
::retractall(log_(_, _)).
before(Object, Message, _) :-
self(Self),
(Self = Object ->
true
;
::assertz(log_(Object, Message))).
:- end_object.
|
