01: /*
02: * logandc1.java
03: *
04: * Copyright (C) 2003 Peter Graves
05: * $Id: logandc1.java,v 1.6 2003/11/15 11:03:29 beedlem Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * 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:
22: package org.armedbear.lisp;
23:
24: import java.math.BigInteger;
25:
26: public final class logandc1 extends Primitive2 {
27: private logandc1(String name) {
28: super (name);
29: }
30:
31: public LispObject execute(LispObject first, LispObject second)
32: throws ConditionThrowable {
33: if (first instanceof Fixnum) {
34: if (second instanceof Fixnum)
35: return new Fixnum(~((Fixnum) first).getValue()
36: & ((Fixnum) second).getValue());
37: if (second instanceof Bignum) {
38: BigInteger n1 = ((Fixnum) first).getBigInteger();
39: BigInteger n2 = ((Bignum) second).getValue();
40: return number(n1.not().and(n2));
41: }
42: throw new ConditionThrowable(new TypeError(second,
43: "integer"));
44: }
45: if (first instanceof Bignum) {
46: BigInteger n1 = ((Bignum) first).getValue();
47: if (second instanceof Fixnum) {
48: BigInteger n2 = ((Fixnum) second).getBigInteger();
49: return number(n1.not().and(n2));
50: }
51: if (second instanceof Bignum) {
52: BigInteger n2 = ((Bignum) second).getValue();
53: return number(n1.not().and(n2));
54: }
55: throw new ConditionThrowable(new TypeError(second,
56: "integer"));
57: }
58: throw new ConditionThrowable(new TypeError(first, "integer"));
59: }
60:
61: private static final logandc1 LOGANDC1 = new logandc1("logandc1");
62: }
|