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graphs.hxx VIGRA

1 /************************************************************************/
2 /* */
3 /* Copyright 2011-2012 Stefan Schmidt and Ullrich Koethe */
4 /* */
5 /* This file is part of the VIGRA computer vision library. */
6 /* The VIGRA Website is */
7 /* http://hci.iwr.uni-heidelberg.de/vigra/ */
8 /* Please direct questions, bug reports, and contributions to */
9 /* ullrich.koethe@iwr.uni-heidelberg.de or */
10 /* vigra@informatik.uni-hamburg.de */
11 /* */
12 /* Permission is hereby granted, free of charge, to any person */
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21 /* The above copyright notice and this permission notice shall be */
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23 /* Software. */
24 /* */
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34 /************************************************************************/
35 
36 /**
37  * This header provides definitions of graph-related types
38  * and optionally provides a gateway to popular graph libraries
39  * (for now, BGL is supported).
40  */
41 
42 #ifndef VIGRA_GRAPH_HXX
43 #define VIGRA_GRAPH_HXX
44 
45 #include "metaprogramming.hxx"
46 #include "tinyvector.hxx"
47 
48 #ifdef WITH_BOOST_GRAPH
49 
50 # include <boost/tuple/tuple.hpp>
51 # include <boost/graph/graph_traits.hpp>
52 # include <boost/graph/properties.hpp>
53 
54 #else // not WITH_BOOST_GRAPH
55 
56 // emulate the BGL-style interface
57 namespace boost {
58 
59 struct no_property {};
60 
61 // tag classes were copied from boost:
62 // directed_category tags
63 struct directed_tag { };
64 struct undirected_tag { };
65 struct bidirectional_tag : public directed_tag { };
66 
67 // traversal_category tags
68 struct incidence_graph_tag { };
69 struct adjacency_graph_tag { };
70 struct bidirectional_graph_tag : public incidence_graph_tag { };
71 struct vertex_list_graph_tag { };
72 struct edge_list_graph_tag { };
73 struct adjacency_matrix_tag { };
74 
75 // edge_parallel_category tags
76 struct allow_parallel_edge_tag { };
77 struct disallow_parallel_edge_tag { };
78 
79 // property maps:
80 struct readable_property_map_tag { };
81 struct writable_property_map_tag { };
82 struct read_write_property_map_tag
83  : public readable_property_map_tag,
84  public writable_property_map_tag {};
85 struct lvalue_property_map_tag
86  : public read_write_property_map_tag {};
87 
88 struct vertex_index_t {};
89 
90 struct edge_property_tag {};
91 
92 #ifndef BOOST_TUPLE_HPP
93 
94 // tie() support for std::pair, similar to Boost's one:
95 // (necessary because std::pair doesn't define a suitable assignment operator)
96 template<class T1, class T2>
97 class tie_adapter
98 {
99  public:
100  tie_adapter(T1 &x, T2 &y)
101  : x_(x), y_(y)
102  {}
103 
104  template<class X, class Y>
105  tie_adapter & operator=(const std::pair<X, Y> &pair)
106  {
107  x_ = pair.first;
108  y_ = pair.second;
109  return *this;
110  }
111 
112  protected:
113  T1 &x_;
114  T2 &y_;
115 };
116 
117 template<class T1, class T2>
118 inline
119 tie_adapter<T1, T2>
120 tie(T1& t1, T2& t2)
121 {
122  return tie_adapter<T1, T2>(t1, t2);
123 }
124 #endif
125 
126 // graph_traits class template
127 template <typename G>
128 struct graph_traits {
129  typedef typename G::vertex_descriptor vertex_descriptor;
130  typedef typename G::edge_descriptor edge_descriptor;
131  typedef typename G::adjacency_iterator adjacency_iterator;
132  typedef typename G::out_edge_iterator out_edge_iterator;
133  typedef typename G::in_edge_iterator in_edge_iterator;
134  typedef typename G::vertex_iterator vertex_iterator;
135  typedef typename G::edge_iterator edge_iterator;
136 
137  typedef typename G::directed_category directed_category;
138  typedef typename G::edge_parallel_category edge_parallel_category;
139  typedef typename G::traversal_category traversal_category;
140 
141  typedef typename G::vertices_size_type vertices_size_type;
142  typedef typename G::edges_size_type edges_size_type;
143  typedef typename G::degree_size_type degree_size_type;
144 
145  static inline vertex_descriptor null_vertex()
146  {
147  return vertex_descriptor(-1);
148  }
149 };
150 
151 // property_traits class template
152 template <typename PropMap>
153 struct property_traits
154 {
155  typedef typename PropMap::key_type key_type;
156  typedef typename PropMap::value_type value_type;
157  typedef typename PropMap::reference reference;
158  typedef typename PropMap::category category;
159 };
160 
161 namespace {
162 
163 vertex_index_t vertex_index;
164 
165 } // anonymous namespace
166 
167 } // namespace boost
168 
169 #endif // WITH_BOOST_GRAPH
170 
171 namespace vigra {
172 namespace boost_graph {
173 
174 // vigra::boost_graph contains algorithms that are compatible to the Boost Graph Library
175 using namespace boost;
176 
177 }} // namespace vigra::boost_graph
178 
179 
180 
181 
182 #if 0
183 namespace vigragraph {
184 
185 // custom get_helper for read-only property maps (by-value)
186 
187 template <class ValueType, class ReadablePropertyMap>
188 struct get_helper { };
189 
190 template <class PropertyMap, class ValueType, class K>
191 inline ValueType
192 get(const get_helper<ValueType, PropertyMap>& pa, const K& k)
193 {
194  const ValueType v = static_cast<const PropertyMap&>(pa)[k];
195  return v;
196 }
197 
198 
199 // ! A fallback template for adjacent_vertices() called with
200 // a vertex_iterator
201 // (which may be specialized to be implemented more efficiently;
202 // the reason is that the iterator may have more information than
203 // the plain vertex_descriptor, e.g. it knows the neighborhood
204 // already which otherwise needs to be reconstructed.)
205 template<class GRAPH>
206 inline
207 std::pair<typename graph_traits<GRAPH>::adjacency_iterator,
208  typename graph_traits<GRAPH>::adjacency_iterator >
209 adjacent_vertices_at_iterator(typename graph_traits<GRAPH>::vertex_iterator const &v,
210  GRAPH const &g)
211 {
212  // the default implementation just derefences the iterator
213  // to yield a vertex_descriptor and forwards the call
214  std::cout << "FB" << std::endl;
215  return adjacent_vertices(*v, g);
216 }
217 
218 } // namespace vigragraph
219 #endif
220 
221 #ifdef WITH_LEMON
222 # include <lemon/core.h>
223 #else // not WITH_LEMON
224 
225 // emulate the lemon interface
226 namespace lemon {
227 
228 struct Invalid {
229  public:
230  bool operator==(Invalid) const { return true; }
231  bool operator!=(Invalid) const { return false; }
232  bool operator< (Invalid) const { return false; }
233 
234  template <class T, int N>
235  operator vigra::TinyVector<T, N>() const
236  {
237  return vigra::TinyVector<T, N>(-1);
238  }
239 };
240 
241 static const Invalid INVALID = Invalid();
242 
243 typedef vigra::VigraTrueType True;
244 typedef vigra::VigraFalseType False;
245 
246 } // namespace lemon
247 
248 #endif // WITH_LEMON
249 
250 namespace lemon {
251 
252 template <class T>
253 inline bool operator==(T const & t, Invalid)
254 {
255  return t == T(Invalid());
256 }
257 
258 template <class T>
259 inline bool operator==(Invalid, T const & t)
260 {
261  return t == T(Invalid());
262 }
263 
264 template <class T>
265 inline bool operator!=(T const & t, Invalid)
266 {
267  return t != T(Invalid());
268 }
269 
270 template <class T>
271 inline bool operator!=(Invalid, T const & t)
272 {
273  return t != T(Invalid());
274 }
275 
276 } // namespace lemon
277 
278 namespace vigra {
279 namespace lemon_graph {
280 
281 // vigra::lemon_graph contains algorithms that are compatible to the LEMON graph library
282 using namespace lemon;
283 
284 }} // namespace vigra::lemon_graph
285 
286 #endif // VIGRA_GRAPH_HXX

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de)
Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany

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vigra 1.10.0 (Mon Nov 18 2013)