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Java > Open Source Codes > soot > grimp > internal > AbstractGrimpFloatBinopExpr


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1999 Patrick Lam
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 /*
21  * Modified by the Sable Research Group and others 1997-1999.
22  * See the 'credits' file distributed with Soot for the complete list of
23  * contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
24  */
25
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29
30
31 package soot.grimp.internal;
32
33 import soot.*;
34 import soot.grimp.*;
35 import soot.util.*;
36 import java.util.*;
37 import soot.jimple.*;
38 import soot.jimple.internal.*;
39
40 abstract public class AbstractGrimpFloatBinopExpr
41     extends AbstractFloatBinopExpr implements Precedence
42 {
43     AbstractGrimpFloatBinopExpr(Value op1, Value op2)
44     {
45         this(Grimp.v().newArgBox(op1),
46              Grimp.v().newArgBox(op2));
47     }
48
49     protected AbstractGrimpFloatBinopExpr(ValueBox op1Box, ValueBox op2Box)
50     {
51         this.op1Box = op1Box;
52         this.op2Box = op2Box;
53     }
54
55     abstract public int getPrecedence();
56
57     private String JavaDoc toString(Value op1, Value op2,
58                             String JavaDoc leftOp, String JavaDoc rightOp)
59     {
60         if (op1 instanceof Precedence &&
61             ((Precedence)op1).getPrecedence() < getPrecedence())
62             leftOp = "(" + leftOp + ")";
63
64     if (op2 instanceof Precedence) {
65         int opPrec = ((Precedence) op2).getPrecedence(),
66         myPrec = getPrecedence();
67         
68         if ((opPrec < myPrec) ||
69         ((opPrec == myPrec) && ((this instanceof SubExpr) || (this instanceof DivExpr))))
70         rightOp = "(" + rightOp + ")";
71     }
72                            
73         return leftOp + getSymbol() + rightOp;
74     }
75
76     public String JavaDoc toString()
77     {
78         Value op1 = op1Box.getValue(), op2 = op2Box.getValue();
79         String JavaDoc leftOp = op1.toString(), rightOp = op2.toString();
80
81         return toString(op1, op2, leftOp, rightOp);
82     }
83 }
84
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