/*
* Location.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.cfa;
import org.jakstab.asm.AbsoluteAddress;
/**
* A location which uniquely identifies a RTLStatement in the program. It
* consists of an address part, which equals the virtual address of the
* instruction this statement is derived from, and of an index part
* inside the instruction.
*
* @author Johannes Kinder
*/
public class RTLLabel implements Location {
private final AbsoluteAddress address;
private final int index;
public RTLLabel(AbsoluteAddress address) {
this(address, 0);
}
public RTLLabel(AbsoluteAddress address, int index) {
super();
this.address = address;
this.index = index;
}
public AbsoluteAddress getAddress() {
return address;
}
public int getIndex() {
return index;
}
@Override
public String toString() {
return address.toString() + '_' + index;
}
@Override
public int compareTo(Location l) {
if (!(l instanceof RTLLabel))
throw new UnsupportedOperationException("Cannot compare RTLLabel to other location types.");
RTLLabel other = (RTLLabel)l;
if (other.address.equals(address) && other.index == index) return 0;
else if (other.address.getValue() < address.getValue() ||
(other.address.getValue() == address.getValue()
&& other.index < index)) return 1;
else return -1;
}
/*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((address == null) ? 0 : address.hashCode());
result = prime * result + index;
return result;
}
/*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
RTLLabel other = (RTLLabel) obj;
if (address == null) {
if (other.address != null)
return false;
} else if (!address.equals(other.address))
return false;
if (index != other.index)
return false;
return true;
}
@Override
public RTLLabel getLabel() {
return this;
}
}