/*
* RTLAssert.java - This file is part of the Jakstab project.
* Copyright 2007-2015 Johannes Kinder <jk@jakstab.org>
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, see <http://www.gnu.org/licenses/>.
*/
package org.jakstab.rtl.statements;
import java.util.Set;
import org.jakstab.rtl.Context;
import org.jakstab.rtl.expressions.RTLExpression;
import org.jakstab.rtl.expressions.RTLMemoryLocation;
import org.jakstab.rtl.expressions.SetOfVariables;
import org.jakstab.util.Logger;
/**
* An assertion which can be verified by an analysis but has no other effect on program behavior.
*
* @author Johannes Kinder
*/
public class RTLAssert extends AbstractRTLStatement implements RTLStatement {
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(RTLAssert.class);
private RTLExpression assertion;
/**
* @param assertion
*/
public RTLAssert(RTLExpression assertion) {
super();
this.assertion = assertion;
}
/*
* @see org.jakstab.rtl.AbstractRTLStatement#initDefinedVariables()
*/
@Override
protected SetOfVariables initDefinedVariables() {
return SetOfVariables.EMPTY_SET;
}
/*
* @see org.jakstab.rtl.AbstractRTLStatement#initUsedMemoryLocations()
*/
@Override
protected Set<RTLMemoryLocation> initUsedMemoryLocations() {
return assertion.getUsedMemoryLocations();
}
/*
* @see org.jakstab.rtl.AbstractRTLStatement#initUsedVariables()
*/
@Override
protected SetOfVariables initUsedVariables() {
return assertion.getUsedVariables();
}
public RTLExpression getAssertion() {
return assertion;
}
/*
* @see org.jakstab.rtl.RTLStatement#accept(org.jakstab.rtl.StatementVisitor)
*/
@Override
public <T> T accept(StatementVisitor<T> visitor) {
return visitor.visit(this);
}
/*
* @see org.jakstab.rtl.RTLStatement#evaluate(org.jakstab.rtl.Context)
*/
@Override
public RTLStatement evaluate(Context context) {
invalidateCache();
assertion = assertion.evaluate(context);
return this;
}
/*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "assert " + assertion.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result
+ ((assertion == null) ? 0 : assertion.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!super.equals(obj))
return false;
if (getClass() != obj.getClass())
return false;
RTLAssert other = (RTLAssert) obj;
if (assertion == null) {
if (other.assertion != null)
return false;
} else if (!assertion.equals(other.assertion))
return false;
return true;
}
}