source: trunk/abcl/src/org/armedbear/lisp/tree-equal.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: 2.2 KB
Line 
1;;; tree-equal.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: tree-equal.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(in-package "SYSTEM")
33
34;;; From SBCL.
35
36(defun tree-equal-test-not (x y test-not)
37  (cond ((consp x)
38   (and (consp y)
39        (tree-equal-test-not (car x) (car y) test-not)
40        (tree-equal-test-not (cdr x) (cdr y) test-not)))
41  ((consp y) nil)
42  ((not (funcall test-not x y)) t)
43  (t ())))
44
45(defun tree-equal-test (x y test)
46  (cond ((consp x)
47   (and (consp y)
48        (tree-equal-test (car x) (car y) test)
49        (tree-equal-test (cdr x) (cdr y) test)))
50  ((consp y) nil)
51  ((funcall test x y) t)
52  (t ())))
53
54(defun tree-equal (x y &key (test #'eql testp) (test-not nil notp))
55  (when (and testp notp)
56    (error "test and test-not both supplied"))
57  (if test-not
58      (tree-equal-test-not x y test-not)
59      (tree-equal-test x y test)))
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