blob: 25302102646462aed67b158ed304c6d1411b2eae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
package org.eclipse.cdt.codan.extension;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTBinaryExpression;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTIdExpression;
import org.eclipse.cdt.core.dom.ast.IASTInitializer;
import org.eclipse.cdt.core.dom.ast.IASTInitializerExpression;
import org.eclipse.cdt.core.dom.ast.IASTLiteralExpression;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IVariable;
/*******************************************************************************
* Copyright (c) 2009 Elliott Baron
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Elliott Baron - initial API and implementation
*******************************************************************************/
public class VariableAssignmentVisitor extends ASTVisitor {
private ExecutionState es;
public VariableAssignmentVisitor(ExecutionState es) {
this.es = es;
shouldVisitInitializers = true;
shouldVisitExpressions = true;
}
@Override
public int visit(IASTInitializer initializer) {
IASTNode parent = initializer.getParent();
if (parent instanceof IASTDeclarator) {
if (initializer instanceof IASTInitializerExpression) {
IASTDeclarator decl = (IASTDeclarator) parent;
IASTExpression expr = ((IASTInitializerExpression) initializer).getExpression();
parseAssignment(parent, decl.getName(), expr);
}
return PROCESS_SKIP;
}
return PROCESS_CONTINUE;
}
@Override
public int visit(IASTExpression expression) {
if (expression instanceof IASTBinaryExpression) {
IASTBinaryExpression binExpr = (IASTBinaryExpression) expression;
int op = binExpr.getOperator();
// Check operator is an assignment operator
if (op == IASTBinaryExpression.op_assign) { // FIXME other ops
IASTExpression o1 = binExpr.getOperand1();
if (o1 instanceof IASTIdExpression) {
IASTName name = ((IASTIdExpression) o1).getName();
parseAssignment(binExpr, name, binExpr.getOperand2());
}
return PROCESS_SKIP;
}
}
return PROCESS_CONTINUE;
}
private void parseAssignment(IASTNode parent, IASTName name, IASTExpression valueExpr) {
IBinding binding = name.resolveBinding();
if (binding instanceof IVariable) {
IVariable var = (IVariable) binding;
Boolean truth = getTruthValue(valueExpr);
if (truth != null) {
es.addTruthAssignment(var, truth);
}
}
}
private Boolean getTruthValue(IASTExpression valueExpr) {
Boolean result = null;
// Handle assignment from literals
if (valueExpr instanceof IASTLiteralExpression) {
int kind = ((IASTLiteralExpression) valueExpr).getKind();
String value = String.valueOf(((IASTLiteralExpression) valueExpr).getValue());
switch (kind) {
case IASTLiteralExpression.lk_integer_constant:
// 0 = False, > 0 = True
result = !value.equals("0");
}
}
// TODO other variable assignments
return result;
}
}
|
