/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.fixpoint;
/**
* Constants used in the fixed-point solver framework
*/
public interface FixedPointConstants {
/**
* A return value which indicates that a lhs has changed, and the statement might
* need to be evaluated again.
*/
final static byte CHANGED = 1;
/**
* A return value which indicates that lhs has not changed, and the statement might
* need to be evaluated again.
*/
final static byte NOT_CHANGED = 0;
/**
* A return value which indicates that lhs has changed, and the statement need not
* be evaluated again.
*/
final static byte CHANGED_AND_FIXED = 3;
/**
* A return value which indicates that lhs has not changed, and the statement need
* not be evaluated again.
*/
final static byte NOT_CHANGED_AND_FIXED = 2;
/**
* The bit-mask which defines the "CHANGED" flag
*/
final static int CHANGED_MASK = 0x1;
/**
* The bit-mask which defines the "FIXED" flag
*/
final static int FIXED_MASK = 0x2;
/**
* The bit-mask which defines the "SIDE EFFECT" flag
*/
final static int SIDE_EFFECT_MASK = 0x4;
}