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/*******************************************************************************
* 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
*******************************************************************************/
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.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;
import org.eclipse.ptp.pldt.mpi.analysis.cdt.graphs.IBlock;
/*******************************************************************************
* 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 IBlock blk;
private ExecutionState es;
public VariableAssignmentVisitor(IBlock blk, ExecutionState es) {
this.blk = blk;
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 = ASTParserUtil.getTruthValue(valueExpr);
if (truth != null) {
es.addTruthAssignment(var, truth, blk);
}
}
}
}
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