/usr/include/claw/graph_algorithm.hpp is in libclaw-dev 1.7.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | /*
CLAW - a C++ Library Absolutely Wonderful
CLAW is a free library without any particular aim but being useful to
anyone.
Copyright (C) 2005-2011 Julien Jorge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
contact: julien.jorge@gamned.org
*/
/**
* \file graph_algorithm.hpp
* \brief Various algorithms for graph manipulation.
* \author Julien Jorge
*/
#ifndef __CLAW_GRAPH_ALGORITHM_HPP__
#define __CLAW_GRAPH_ALGORITHM_HPP__
#include <map>
namespace claw
{
//*************************** graph::scan_events ****************************
/**
* \brief Different stages of graph scanning.
*/
template<class Graph>
class scan_events
{
public:
typedef typename Graph::vertex_type vertex_type;
public:
void init( const Graph& g ) {}
void start_vertex( const vertex_type& v ) {}
void visit_edge( const vertex_type& v1, const vertex_type& v2 ) {}
void end_vertex( const vertex_type& v ) {}
}; // class scan_events
//************************** breadth_scan ***********************************
/**
* \brief This class performs a depth scan of a graph. Only reachables
* vertices from a given vertex are proceeded.
*/
template<class Graph, class Events = scan_events<Graph> >
class breadth_scan
{
public:
typedef typename Graph::vertex_type vertex_type;
typedef typename Graph::vertex_iterator vertex_iterator ;
/**
* \brief Colors are :
* - 0 : never seen.
* - 1 : seen but not done.
* - 2 : done.
*/
typedef std::map<vertex_type, int,
typename Graph::vertex_compare> coloration;
public:
breadth_scan( const Graph& g, const vertex_type& source,
Events& events );
void operator()();
private:
const Graph& m_g;
const vertex_type& m_source;
Events& m_events;
}; // class breadth_scan
//**************************** depth_scan ***********************************
/**
* \brief This class performs a depth scan of a graph. All nodes are
* proceeded.
*/
template<class Graph, class Events = typename Graph::scan_events>
class depth_scan
{
public:
typedef typename Graph::vertex_type vertex_type;
typedef typename Graph::vertex_iterator vertex_iterator ;
/**
* \brief Colors are :
* - 0 : never seen.
* - 1 : seen but not done.
* - 2 : done.
*/
typedef std::map<vertex_type, int,
typename Graph::vertex_compare> coloration;
public:
depth_scan( const Graph& g, Events& events );
void operator()();
private:
void recursive_scan(const vertex_type& s, coloration& seen_vertices);
private:
const Graph& m_g;
Events& m_events;
}; // class depth_scan
//********************** topological_sort ***********************************
/**
* \brief Pass this class as the "Envents" template parameter of the
* depth scan class to sort the vertices of a graph with the
* topological sort algorithm.
*
* When a node process ends, the node is added to a vector. The vector is
* filled from end to begining.
*/
template<class Graph>
class topological_sort : public scan_events<Graph>
{
public:
typedef typename scan_events<Graph>::vertex_type vertex_type;
typedef std::vector<vertex_type> result_type;
typedef typename result_type::const_iterator const_iterator;
typedef topological_sort<Graph> self_type;
public:
void init( const Graph& g );
void end_vertex( const vertex_type& s );
void operator()( const Graph& g );
const vertex_type& operator[](unsigned int index) const;
const_iterator begin() const;
const_iterator end() const;
private:
/** \brief The vector we're filling. */
result_type m_result;
/** \brief Index of the next item to put in the vector. */
int m_next_index;
}; // class topological_sort
} // namespace claw
#include <claw/impl/graph_algorithm.tpp>
#endif // __CLAW_GRAPH_ALGORITHM_HPP__
|