1 /*
2  * logorc1.java
3  *
4  * Copyright (C) 2003-2004 Peter Graves
5  * $Id$
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20  *
21  * As a special exception, the copyright holders of this library give you
22  * permission to link this library with independent modules to produce an
23  * executable, regardless of the license terms of these independent
24  * modules, and to copy and distribute the resulting executable under
25  * terms of your choice, provided that you also meet, for each linked
26  * independent module, the terms and conditions of the license of that
27  * module.  An independent module is a module which is not derived from
28  * or based on this library.  If you modify this library, you may extend
29  * this exception to your version of the library, but you are not
30  * obligated to do so.  If you do not wish to do so, delete this
31  * exception statement from your version.
32  */
33 
34 package org.armedbear.lisp;
35 
36 import static org.armedbear.lisp.Lisp.*;
37 
38 import java.math.BigInteger;
39 
40 // ### logorc1
41 // logorc1 integer-1 integer-2 => result-integer
42 // or complement of integer-1 with integer-2
43 public final class logorc1 extends Primitive
44 {
logorc1()45     private logorc1()
46     {
47         super("logorc1", "integer-1 integer-2");
48     }
49 
50     @Override
execute(LispObject first, LispObject second)51     public LispObject execute(LispObject first, LispObject second)
52 
53     {
54         if (first instanceof Fixnum) {
55             if (second instanceof Fixnum)
56                 return Fixnum.getInstance(~((Fixnum)first).value |
57                                   ((Fixnum)second).value);
58             if (second instanceof Bignum) {
59                 BigInteger n1 = ((Fixnum)first).getBigInteger();
60                 BigInteger n2 = ((Bignum)second).value;
61                 return number(n1.not().or(n2));
62             }
63             return type_error(second, Symbol.INTEGER);
64         }
65         if (first instanceof Bignum) {
66             BigInteger n1 = ((Bignum)first).value;
67             if (second instanceof Fixnum) {
68                 BigInteger n2 = ((Fixnum)second).getBigInteger();
69                 return number(n1.not().or(n2));
70             }
71             if (second instanceof Bignum) {
72                 BigInteger n2 = ((Bignum)second).value;
73                 return number(n1.not().or(n2));
74             }
75             return type_error(second, Symbol.INTEGER);
76         }
77         return type_error(first, Symbol.INTEGER);
78     }
79 
80     private static final Primitive LOGORC1 = new logorc1();
81 }
82