01: //
02: // Copyright (C) 2005 United States Government as represented by the
03: // Administrator of the National Aeronautics and Space Administration
04: // (NASA). All Rights Reserved.
05: //
06: // This software is distributed under the NASA Open Source Agreement
07: // (NOSA), version 1.3. The NOSA has been approved by the Open Source
08: // Initiative. See the file NOSA-1.3-JPF at the top of the distribution
09: // directory tree for the complete NOSA document.
10: //
11: // THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12: // KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13: // LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14: // SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15: // A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16: // THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17: // DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18: //
19: package gov.nasa.jpf.jvm.bytecode;
20:
21: import org.apache.bcel.classfile.ConstantPool;
22:
23: /**
24: * class abstracting instructions that access local variables, to keep
25: * track of slot/varname mapping
26: */
27: public abstract class LocalVariableInstruction extends Instruction
28: implements VariableAccessor {
29: int index;
30: String varId;
31:
32: public void setPeer(org.apache.bcel.generic.Instruction i,
33: ConstantPool cp) {
34: index = ((org.apache.bcel.generic.LocalVariableInstruction) i)
35: .getIndex();
36: }
37:
38: public int getLocalVariableIndex() {
39: return index;
40: }
41:
42: public String getLocalVariableName() {
43: String[] names = mi.getLocalVariableNames();
44:
45: if (names != null) {
46: return names[index];
47: } else {
48: return "?";
49: }
50: }
51:
52: public String getLocalVariableType() {
53: String[] types = mi.getLocalVariableTypes();
54:
55: if (types != null) {
56: return types[index];
57: } else {
58: return "?";
59: }
60: }
61:
62: public String getVariableId() {
63: if (varId == null) {
64: varId = mi.getClassInfo().getName() + '.'
65: + mi.getUniqueName() + '.' + getLocalVariableName();
66: }
67:
68: return varId;
69: }
70: }
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