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/*
 * 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.
 *
 * This file is a derivative of code released under the terms listed below.
 *
 */
/*
 *
 * Copyright (c) 2009-2012,
 *
 *  Galois, Inc. (Aaron Tomb , Rogan Creswick )
 *  Steve Suh    
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The names of the contributors may not be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *
 */
package org.scandroid.flow.functions;

import com.ibm.wala.dataflow.IFDS.IFlowFunction;
import com.ibm.wala.dataflow.IFDS.IFlowFunctionMap;
import com.ibm.wala.dataflow.IFDS.IReversibleFlowFunction;
import com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction;
import com.ibm.wala.dataflow.IFDS.IdentityFlowFunction;
import com.ibm.wala.ipa.cfg.BasicBlockInContext;
import com.ibm.wala.ssa.ISSABasicBlock;
import com.ibm.wala.util.intset.IntSet;
import com.ibm.wala.util.intset.SparseIntSet;

public class IDTransferFunctions
    implements IFlowFunctionMap> {
  public static final IntSet EMPTY_SET = new SparseIntSet();
  public static final IntSet ZERO_SET = SparseIntSet.singleton(0);

  private static final IReversibleFlowFunction IDENTITY_FN = new IdentityFlowFunction();

  @Override
  public IUnaryFlowFunction getNormalFlowFunction(
      BasicBlockInContext src, BasicBlockInContext dest) {
    return IDENTITY_FN;
  }

  @Override
  public IUnaryFlowFunction getCallFlowFunction(
      BasicBlockInContext src, BasicBlockInContext dest, BasicBlockInContext ret) {
    return IDENTITY_FN;
  }

  @Override
  public IFlowFunction getReturnFlowFunction(
      BasicBlockInContext call, BasicBlockInContext src, BasicBlockInContext dest) {
    return IDENTITY_FN;
  }

  @Override
  public IUnaryFlowFunction getCallToReturnFlowFunction(
      BasicBlockInContext src, BasicBlockInContext dest) {
    return IDENTITY_FN;
  }

  @Override
  public IUnaryFlowFunction getCallNoneToReturnFlowFunction(
      BasicBlockInContext src, BasicBlockInContext dest) {
    return IDENTITY_FN;
  }
}