82 lines
2.6 KiB
Java
82 lines
2.6 KiB
Java
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/*
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*
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* Copyright (c) 2009-2012,
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*
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* Adam Fuchs <afuchs@cs.umd.edu>
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* Avik Chaudhuri <avik@cs.umd.edu>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The names of the contributors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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package org.scandroid.prefixtransfer;
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import com.ibm.wala.fixpoint.UnaryOperator;
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public class PrefixTransferFunction extends UnaryOperator<PrefixVariable>
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{
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private final InstanceKeySite node;
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public PrefixTransferFunction(InstanceKeySite node)
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{
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this.node = node;
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}
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// public int nodeID = finalNode.getGraphNodeId();
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@Override
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public byte evaluate(PrefixVariable lhs,
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PrefixVariable rhs) {
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PrefixVariable newLhs = node.propagate(rhs);
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// if(lhs.equals(newLhs))
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// return 1;
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lhs.copyState(newLhs);
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return 1;
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}
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@Override
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public boolean equals(Object o) {
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if(o != null && o.getClass().equals(this.getClass()))
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return this.node == ((PrefixTransferFunction)o).node;
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return false;
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}
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@Override
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public int hashCode() {
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return node.hashCode();
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}
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@Override
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public String toString() {
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return "Unary operator for "+node;
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}
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}
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