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Java > Open Source Codes > soot > dava > toolkits > base > misc > ConditionFlipper


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2003 Jerome Miecznikowski
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 package soot.dava.toolkits.base.misc;
21
22 import soot.jimple.*;
23 import soot.grimp.internal.*;
24
25 public class ConditionFlipper
26 {
27     public static ConditionExpr flip( ConditionExpr ce)
28     {
29     if (ce instanceof EqExpr)
30         return new GNeExpr( ce.getOp1(), ce.getOp2());
31
32     if (ce instanceof NeExpr)
33         return new GEqExpr( ce.getOp1(), ce.getOp2());
34
35     if (ce instanceof GtExpr)
36         return new GLeExpr( ce.getOp1(), ce.getOp2());
37
38     if (ce instanceof LtExpr)
39         return new GGeExpr( ce.getOp1(), ce.getOp2());
40
41     if (ce instanceof GeExpr)
42         return new GLtExpr( ce.getOp1(), ce.getOp2());
43
44     if (ce instanceof LeExpr)
45         return new GGtExpr( ce.getOp1(), ce.getOp2());
46
47     return null;
48     }
49 }
50
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