/usr/include/gamera/graph/bfsdfsiterator.hpp is in python-gamera-dev 3.3.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright (C) 2011 Christian Brandt
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _BFSDFSITERATOR_HPP_F320082952C20F
#define _BFSDFSITERATOR_HPP_F320082952C20F
#include "nodetraverseiterator.hpp"
namespace Gamera { namespace GraphApi {
/// lazy iterator performing a Breath-First-Search starting at *start*
class BfsIterator: public NodeTraverseIterator {
NodeQueue _queue;
void init(Node* start);
public:
BfsIterator(Graph* graph, Node* start): NodeTraverseIterator(graph) {
init(start);
};
Node* next();
};
/// lazy iterator performing a Depth-First-Search starting at *start*
/** this iterator can also be used for recognizing cycles by calling
* has_cycles() after a complete search
* */
class DfsIterator: public NodeTraverseIterator {
NodeStack _stack;
std::set<Edge*> _used_edges;
bool found_cycles;
void init(Node* start);
public:
DfsIterator(Graph* graph, Node* start): NodeTraverseIterator(graph) {
init(start);
}
Node* next();
bool has_cycles() {
return found_cycles;
}
};
}} // end Gamera::GraphApi
#endif /* _BFSDFSITERATOR_HPP_F320082952C20F */
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