source: trunk/j/src/org/armedbear/lisp/boole.lisp @ 3680

Last change on this file since 3680 was 3680, checked in by piso, 18 years ago

Initial checkin.

File size: 1.5 KB
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1;;; boole.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: boole.lisp,v 1.1 2003-09-10 18:01:56 piso Exp $
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(defun boole (op n1 n2)
21  (unless (and (integerp n1) (integerp n2))
22    (error 'type-error "BOOLE: ~s is not an integer"
23           (if (integerp n1) n2 n1)))
24  (case op
25    (#.boole-clr 0)
26    (#.boole-set -1)
27    (#.boole-1 n1)
28    (#.boole-2 n2)
29    (#.boole-c1 (lognot n1))
30    (#.boole-c2 (lognot n2))
31    (#.boole-and (logand n1 n2))
32    (#.boole-ior (logior n1 n2))
33    (#.boole-xor (logxor n1 n2))
34    (#.boole-eqv (logeqv n1 n2))
35    (#.boole-nand (lognand n1 n2))
36    (#.boole-nor (lognor n1 n2))
37    (#.boole-andc1 (logandc1 n1 n2))
38    (#.boole-andc2 (logandc2 n1 n2))
39    (#.boole-orc1 (logorc1 n1 n2))
40    (#.boole-orc2 (logorc2 n1 n2))
41    (t
42     (error 'type-error "BOOLE: invalid logical operation specifier: ~S" op))))
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