org.sosy_lab.cpachecker.util.predicates.bdd.SylvanBDDRegion.java Source code

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/*
 *  CPAchecker is a tool for configurable software verification.
 *  This file is part of CPAchecker.
 *
 *  Copyright (C) 2007-2014  Dirk Beyer
 *  All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *
 *  CPAchecker web page:
 *    http://cpachecker.sosy-lab.org
 */
package org.sosy_lab.cpachecker.util.predicates.bdd;

import jsylvan.JSylvan;

import org.sosy_lab.cpachecker.util.predicates.interfaces.Region;

import com.google.common.primitives.Longs;

/**
 * Regions represented using Sylvan BDDs.
 */
public class SylvanBDDRegion implements Region {

    private final long bddRepr;

    SylvanBDDRegion(long pBDD) {
        bddRepr = pBDD;
    }

    @Override
    public boolean isTrue() {
        return bddRepr == JSylvan.getTrue();
    }

    @Override
    public boolean isFalse() {
        return bddRepr == JSylvan.getFalse();
    }

    long getBDD() {
        return bddRepr;
    }

    @Override
    public boolean equals(Object o) {
        if (o instanceof SylvanBDDRegion) {
            return bddRepr == ((SylvanBDDRegion) o).bddRepr;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Longs.hashCode(bddRepr);
    }

    @Override
    public String toString() {
        if (isTrue()) {
            return "true";
        } else if (isFalse()) {
            return "false";
        } else {
            return bddRepr + "";
        }
    }
}