/usr/include/claw/graph.hpp is in libclaw-dev 1.7.0-2.
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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.hpp
* \brief A class to represent a graph.
* \author Julien Jorge
*/
#ifndef __CLAW_GRAPH_HPP__
#define __CLAW_GRAPH_HPP__
#include <claw/meta/no_type.hpp>
#include <map>
#include <vector>
#include <queue>
#include <exception>
#include <iterator>
#include <utility>
namespace claw
{
/**
* \brief The exceptions thrown by the graphs.
* \author Julien Jorge
*/
class graph_exception:
public std::exception
{
public:
graph_exception() throw();
graph_exception( const std::string& s) throw();
virtual ~graph_exception() throw();
virtual const char* what() const throw();
private:
/** \brief A short explanation of the problem. */
const std::string m_msg;
}; // graph_exception
/**
* \brief A class to represent a graph.
*
* <b>Constraints on the template parameters:</b>
* - S is LessThanComparable,
* - A is any Assignable and Default Constructible,
* - Comp is a binary predicate such that Comp(S a, S b) == true if and
* only if a < b.
*
* \author Julien Jorge
*/
template <class S, class A = meta::no_type, class Comp = std::less<S> >
class graph
{
public:
/** \brief Type of the vertices. */
typedef S vertex_type;
/** \brief Type of the edges. */
typedef A edge_type;
/** \brief Binary predicate to compare vertices. */
typedef Comp vertex_compare;
/** \brief The adjacency list of a vertex.
vertex_type is the target vertex,
edge_type is the label on the edge. */
typedef std::map<vertex_type, edge_type, vertex_compare> neighbours_list;
/** \brief The whole graph: an adjacency list for each vertex. */
typedef std::map<vertex_type, neighbours_list, vertex_compare>
graph_content;
/** \brief Type of the current structure. */
typedef claw::graph<vertex_type, edge_type, vertex_compare> self_type;
/**
* \brief Iterator on the graph's vertices.
*/
class graph_vertex_iterator
{
friend class graph<vertex_type, edge_type, vertex_compare>;
public:
typedef const vertex_type value_type;
typedef const vertex_type& reference;
typedef const vertex_type* const pointer;
typedef ptrdiff_t difference_type;
typedef std::bidirectional_iterator_tag iterator_category;
public:
graph_vertex_iterator();
graph_vertex_iterator& operator++();
graph_vertex_iterator operator++(int);
graph_vertex_iterator& operator--();
graph_vertex_iterator operator--(int);
reference operator*() const;
pointer operator->() const;
bool operator==(const graph_vertex_iterator& it) const;
bool operator!=(const graph_vertex_iterator& it) const;
private:
explicit
graph_vertex_iterator( typename graph_content::const_iterator it );
private:
/** \brief Iterator on the list of vertex. */
typename graph_content::const_iterator m_iterator;
}; // class graph_vertex_iterator
/**
* \brief Iterator on the graph's edges.
*/
class graph_edge_iterator
{
friend class graph<vertex_type, edge_type, vertex_compare>;
public:
/**
* \brief Value pointed by the iterator.
*/
class edge
{
friend class graph_edge_iterator;
public:
edge();
const edge_type& label() const;
const vertex_type& source() const;
const vertex_type& target() const;
private:
void set( const edge_type& l, const vertex_type& s,
const vertex_type& t );
private:
edge_type const* m_label;
vertex_type const* m_source;
vertex_type const* m_target;
}; // class edge
public:
typedef const edge value_type;
typedef const edge& reference;
typedef const edge* const pointer;
typedef ptrdiff_t difference_type;
typedef std::bidirectional_iterator_tag iterator_category;
public:
graph_edge_iterator();
graph_edge_iterator& operator++();
graph_edge_iterator operator++(int);
graph_edge_iterator& operator--();
graph_edge_iterator operator--(int);
reference operator*() const;
pointer operator->() const;
bool operator==(const graph_edge_iterator& it) const;
bool operator!=(const graph_edge_iterator& it) const;
private:
explicit
graph_edge_iterator( typename graph_content::const_iterator it_begin,
typename graph_content::const_iterator it_end,
typename graph_content::const_iterator it_s,
typename neighbours_list::const_iterator it_d );
private:
/** \brief Iterator of the first node. */
typename graph_content::const_iterator m_vertex_begin;
/** \brief Iterator of the last node. */
typename graph_content::const_iterator m_vertex_end;
/** \brief Iterator on the list of vertex. */
typename graph_content::const_iterator m_vertex_iterator;
/** \brief Iterator on the list of edges. */
typename neighbours_list::const_iterator m_neighbours_iterator;
/** \brief Current edge. */
edge m_edge;
}; // class graph_edge_iterator
public:
typedef graph_vertex_iterator vertex_iterator;
typedef graph_edge_iterator edge_iterator;
typedef std::reverse_iterator<vertex_iterator> reverse_vertex_iterator;
typedef std::reverse_iterator<edge_iterator> reverse_edge_iterator;
public:
graph();
void add_edge( const vertex_type& s1, const vertex_type& s2,
const edge_type& e = edge_type() );
void add_vertex( const vertex_type& s );
bool edge_exists( const vertex_type& s, const vertex_type& r ) const;
void neighbours( const vertex_type& s, std::vector<vertex_type>& v ) const;
void vertices( std::vector<vertex_type>& v ) const;
vertex_iterator vertex_begin() const;
vertex_iterator vertex_end() const;
vertex_iterator vertex_begin( const vertex_type& s ) const;
reverse_vertex_iterator vertex_rbegin() const;
reverse_vertex_iterator vertex_rend() const;
reverse_vertex_iterator vertex_rbegin( const vertex_type& s ) const;
edge_iterator edge_begin() const;
edge_iterator edge_end() const;
edge_iterator edge_begin( const vertex_type& s1,
const vertex_type& s2 ) const;
reverse_edge_iterator edge_rbegin() const;
reverse_edge_iterator edge_rend() const;
reverse_edge_iterator edge_rbegin( const vertex_type& s1,
const vertex_type& s2 ) const;
const edge_type& label( const vertex_type& s, const vertex_type& r ) const;
std::size_t outer_degree( const vertex_type& s ) const;
std::size_t inner_degree( const vertex_type& s ) const;
std::size_t vertices_count() const;
std::size_t edges_count() const;
private:
/** \brief The content of the graph (edges and vertices. */
graph_content m_edges;
/** \brief Inner degree of the vertices. */
std::map<vertex_type, std::size_t, vertex_compare> m_inner_degrees;
/** \brief Number of edges. */
std::size_t m_edges_count;
}; // class graph
} // namespace claw
#include <claw/impl/graph.tpp>
#endif // __CLAW_GRAPH_HPP__
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