source: trunk/abcl/src/org/armedbear/lisp/dribble.lisp @ 14207

Last change on this file since 14207 was 11391, checked in by vvoutilainen, 13 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see
http://sourceforge.net/mailarchive/forum.php?thread_name=20040721115302.839%40prufrock&forum_name=armedbear-j-announce

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.6 KB
Line 
1;;; dribble.lisp
2;;;
3;;; Copyright (C) 2004 Peter Graves
4;;; $Id: dribble.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19;;;
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32
33;;; Each time we start dribbling to a new stream, we put it in
34;;; *DRIBBLE-STREAM*, and push a list of *DRIBBLE-STREAM*, *STANDARD-INPUT*,
35;;; *STANDARD-OUTPUT* and *ERROR-OUTPUT* in *PREVIOUS-DRIBBLE-STREAMS*.
36;;; *STANDARD-OUTPUT* and *ERROR-OUTPUT* is changed to a broadcast stream that
37;;; broadcasts to *DRIBBLE-STREAM* and to the old values of the variables.
38;;; *STANDARD-INPUT* is changed to an echo stream that echos input from the old
39;;; value of standard input to *DRIBBLE-STREAM*.
40;;;
41;;; When dribble is called with no arguments, *DRIBBLE-STREAM* is closed,
42;;; and the values of *DRIBBLE-STREAM*, *STANDARD-INPUT*, and
43;;; *STANDARD-OUTPUT* are popped from *PREVIOUS-DRIBBLE-STREAMS*.
44
45;;; From SBCL.
46
47(in-package "SYSTEM")
48
49(defvar *previous-dribble-streams* nil)
50(defvar *dribble-stream* nil)
51
52(defun dribble (&optional pathname &key (if-exists :append))
53  "With a file name as an argument, dribble opens the file and sends a
54  record of further I/O to that file. Without an argument, it closes
55  the dribble file, and quits logging."
56  (cond (pathname
57   (let* ((new-dribble-stream
58     (open pathname
59           :direction :output
60           :if-exists if-exists
61           :if-does-not-exist :create))
62    (new-standard-output
63     (make-broadcast-stream *standard-output* new-dribble-stream))
64    (new-error-output
65     (make-broadcast-stream *error-output* new-dribble-stream))
66    (new-standard-input
67     (make-echo-stream *standard-input* new-dribble-stream)))
68     (push (list *dribble-stream* *standard-input* *standard-output*
69           *error-output*)
70     *previous-dribble-streams*)
71     (setf *dribble-stream* new-dribble-stream)
72     (setf *standard-input* new-standard-input)
73     (setf *standard-output* new-standard-output)
74     (setf *error-output* new-error-output)))
75  ((null *dribble-stream*)
76   (error "Not currently dribbling."))
77  (t
78   (let ((old-streams (pop *previous-dribble-streams*)))
79     (close *dribble-stream*)
80     (setf *dribble-stream* (first old-streams))
81     (setf *standard-input* (second old-streams))
82     (setf *standard-output* (third old-streams))
83     (setf *error-output* (fourth old-streams)))))
84  (values))
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