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/*******************************************************************************
* Copyright (c) 2009, 2010 Alena Laskavaia
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Alena Laskavaia - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.codan.core.model.cfg;
import java.util.Collection;
import java.util.Iterator;
/**
* Represents control flow graph (CFG) object.
* This is "normalized" control flow graph, with typed nodes:
* <br>
* <li> {@link IStartNode} - start node of the cfg (source)
* <li> {@link IExitNode} - exit node of the cfg (sink)
* <li> {@link IPlainNode} - has one incoming one outgoing
* <li> {@link IDecisionNode} - has one incoming and the only node that can have
* multiple outcoming
* arcs
* <li> {@link IConnectorNode} - the only node that can have multiple incoming
* arcs, and one outgoing
* <li> {@link IJumpNode} - has one incoming and one outgoing but represent
* change of control direction
* <li> {@link IBranchNode} - usually node where decision node connect to,
* labels represent a way where controls goes to
*
* @noextend This interface is not intended to be extended by clients.
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface IControlFlowGraph {
/**
* @return start node of the graph. CFG only has one start node.
*/
IStartNode getStartNode();
/**
* @return iterator over exit nodes of control flow graph. Exit nodes
* include return statement,
* and statements with throw and abort/exit functions.
*/
Iterator<IExitNode> getExitNodeIterator();
/**
* @return size of exit nodes list
*/
int getExitNodeSize();
/**
* @return list of roots of dead code sections, they don't have incoming
* arcs
*/
Iterator<IBasicBlock> getUnconnectedNodeIterator();
/**
* @return size of unconnected nodes list
*/
int getUnconnectedNodeSize();
/**
* @return collection of all nodes
*/
Collection<IBasicBlock> getNodes();
}
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