COIN-OR::LEMON - Graph Library

source: lemon/test/dfs_test.cc @ 1359:3ec484b11733

Last change on this file since 1359:3ec484b11733 was 1270:dceba191c00d, checked in by Alpar Juttner <alpar@…>, 6 years ago

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1/* -*- mode: C++; indent-tabs-mode: nil; -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library.
4 *
5 * Copyright (C) 2003-2013
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19#include <lemon/concepts/digraph.h>
20#include <lemon/smart_graph.h>
21#include <lemon/list_graph.h>
22#include <lemon/lgf_reader.h>
23#include <lemon/dfs.h>
24#include <lemon/path.h>
25
26#include "graph_test.h"
27#include "test_tools.h"
28
29using namespace lemon;
30
31char test_lgf[] =
32  "@nodes\n"
33  "label\n"
34  "0\n"
35  "1\n"
36  "2\n"
37  "3\n"
38  "4\n"
39  "5\n"
40  "6\n"
41  "@arcs\n"
42  "     label\n"
43  "0 1  0\n"
44  "1 2  1\n"
45  "2 3  2\n"
46  "1 4  3\n"
47  "4 2  4\n"
48  "4 5  5\n"
49  "5 0  6\n"
50  "6 3  7\n"
51  "@attributes\n"
52  "source 0\n"
53  "target 5\n"
54  "source1 6\n"
55  "target1 3\n";
56
57
58void checkDfsCompile()
59{
60  typedef concepts::Digraph Digraph;
61  typedef Dfs<Digraph> DType;
62  typedef Digraph::Node Node;
63  typedef Digraph::Arc Arc;
64
65  Digraph G;
66  Node s, t;
67  Arc e;
68  int l, i;
69  bool b;
70  ::lemon::ignore_unused_variable_warning(l,i,b);
71
72  DType::DistMap d(G);
73  DType::PredMap p(G);
74  Path<Digraph> pp;
75  concepts::ReadMap<Arc,bool> am;
76
77  {
78    DType dfs_test(G);
79    const DType& const_dfs_test = dfs_test;
80
81    dfs_test.run(s);
82    dfs_test.run(s,t);
83    dfs_test.run();
84
85    dfs_test.init();
86    dfs_test.addSource(s);
87    e = dfs_test.processNextArc();
88    e = const_dfs_test.nextArc();
89    b = const_dfs_test.emptyQueue();
90    i = const_dfs_test.queueSize();
91
92    dfs_test.start();
93    dfs_test.start(t);
94    dfs_test.start(am);
95
96    l  = const_dfs_test.dist(t);
97    e  = const_dfs_test.predArc(t);
98    s  = const_dfs_test.predNode(t);
99    b  = const_dfs_test.reached(t);
100    d  = const_dfs_test.distMap();
101    p  = const_dfs_test.predMap();
102    pp = const_dfs_test.path(t);
103  }
104  {
105    DType
106      ::SetPredMap<concepts::ReadWriteMap<Node,Arc> >
107      ::SetDistMap<concepts::ReadWriteMap<Node,int> >
108      ::SetReachedMap<concepts::ReadWriteMap<Node,bool> >
109      ::SetStandardProcessedMap
110      ::SetProcessedMap<concepts::WriteMap<Node,bool> >
111      ::Create dfs_test(G);
112
113    concepts::ReadWriteMap<Node,Arc> pred_map;
114    concepts::ReadWriteMap<Node,int> dist_map;
115    concepts::ReadWriteMap<Node,bool> reached_map;
116    concepts::WriteMap<Node,bool> processed_map;
117
118    dfs_test
119      .predMap(pred_map)
120      .distMap(dist_map)
121      .reachedMap(reached_map)
122      .processedMap(processed_map);
123
124    dfs_test.run(s);
125    dfs_test.run(s,t);
126    dfs_test.run();
127    dfs_test.init();
128
129    dfs_test.addSource(s);
130    e = dfs_test.processNextArc();
131    e = dfs_test.nextArc();
132    b = dfs_test.emptyQueue();
133    i = dfs_test.queueSize();
134
135    dfs_test.start();
136    dfs_test.start(t);
137    dfs_test.start(am);
138
139    l  = dfs_test.dist(t);
140    e  = dfs_test.predArc(t);
141    s  = dfs_test.predNode(t);
142    b  = dfs_test.reached(t);
143    pp = dfs_test.path(t);
144  }
145}
146
147void checkDfsFunctionCompile()
148{
149  typedef int VType;
150  typedef concepts::Digraph Digraph;
151  typedef Digraph::Arc Arc;
152  typedef Digraph::Node Node;
153
154  Digraph g;
155  bool b;
156  ::lemon::ignore_unused_variable_warning(b);
157
158  dfs(g).run(Node());
159  b=dfs(g).run(Node(),Node());
160  dfs(g).run();
161  dfs(g)
162    .predMap(concepts::ReadWriteMap<Node,Arc>())
163    .distMap(concepts::ReadWriteMap<Node,VType>())
164    .reachedMap(concepts::ReadWriteMap<Node,bool>())
165    .processedMap(concepts::WriteMap<Node,bool>())
166    .run(Node());
167  b=dfs(g)
168    .predMap(concepts::ReadWriteMap<Node,Arc>())
169    .distMap(concepts::ReadWriteMap<Node,VType>())
170    .reachedMap(concepts::ReadWriteMap<Node,bool>())
171    .processedMap(concepts::WriteMap<Node,bool>())
172    .path(concepts::Path<Digraph>())
173    .dist(VType())
174    .run(Node(),Node());
175  dfs(g)
176    .predMap(concepts::ReadWriteMap<Node,Arc>())
177    .distMap(concepts::ReadWriteMap<Node,VType>())
178    .reachedMap(concepts::ReadWriteMap<Node,bool>())
179    .processedMap(concepts::WriteMap<Node,bool>())
180    .run();
181}
182
183template <class Digraph>
184void checkDfs() {
185  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
186
187  Digraph G;
188  Node s, t;
189  Node s1, t1;
190
191  std::istringstream input(test_lgf);
192  digraphReader(G, input).
193    node("source", s).
194    node("target", t).
195    node("source1", s1).
196    node("target1", t1).
197    run();
198
199  Dfs<Digraph> dfs_test(G);
200  dfs_test.run(s);
201
202  Path<Digraph> p = dfs_test.path(t);
203  check(p.length() == dfs_test.dist(t),"path() found a wrong path.");
204  check(checkPath(G, p),"path() found a wrong path.");
205  check(pathSource(G, p) == s,"path() found a wrong path.");
206  check(pathTarget(G, p) == t,"path() found a wrong path.");
207
208  for(NodeIt v(G); v!=INVALID; ++v) {
209    if (dfs_test.reached(v)) {
210      check(v==s || dfs_test.predArc(v)!=INVALID, "Wrong tree.");
211      if (dfs_test.predArc(v)!=INVALID ) {
212        Arc e=dfs_test.predArc(v);
213        Node u=G.source(e);
214        check(u==dfs_test.predNode(v),"Wrong tree.");
215        check(dfs_test.dist(v) - dfs_test.dist(u) == 1,
216              "Wrong distance. (" << dfs_test.dist(u) << "->"
217              << dfs_test.dist(v) << ")");
218      }
219    }
220  }
221
222  {
223  Dfs<Digraph> dfs(G);
224  check(dfs.run(s1,t1) && dfs.reached(t1),"Node 3 is reachable from Node 6.");
225  }
226
227  {
228    NullMap<Node,Arc> myPredMap;
229    dfs(G).predMap(myPredMap).run(s);
230  }
231}
232
233int main()
234{
235  checkDfs<ListDigraph>();
236  checkDfs<SmartDigraph>();
237  return 0;
238}
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