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) 2003-2010 |
---|
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/euler.h> |
---|
20 | #include <lemon/list_graph.h> |
---|
21 | #include <lemon/adaptors.h> |
---|
22 | #include "test_tools.h" |
---|
23 | |
---|
24 | using namespace lemon; |
---|
25 | |
---|
26 | template <typename Digraph> |
---|
27 | void checkDiEulerIt(const Digraph& g, |
---|
28 | const typename Digraph::Node& start = INVALID) |
---|
29 | { |
---|
30 | typename Digraph::template ArcMap<int> visitationNumber(g, 0); |
---|
31 | |
---|
32 | DiEulerIt<Digraph> e(g, start); |
---|
33 | if (e == INVALID) return; |
---|
34 | typename Digraph::Node firstNode = g.source(e); |
---|
35 | typename Digraph::Node lastNode = g.target(e); |
---|
36 | if (start != INVALID) { |
---|
37 | check(firstNode == start, "checkDiEulerIt: Wrong first node"); |
---|
38 | } |
---|
39 | |
---|
40 | for (; e != INVALID; ++e) { |
---|
41 | if (e != INVALID) lastNode = g.target(e); |
---|
42 | ++visitationNumber[e]; |
---|
43 | } |
---|
44 | |
---|
45 | check(firstNode == lastNode, |
---|
46 | "checkDiEulerIt: First and last nodes are not the same"); |
---|
47 | |
---|
48 | for (typename Digraph::ArcIt a(g); a != INVALID; ++a) |
---|
49 | { |
---|
50 | check(visitationNumber[a] == 1, |
---|
51 | "checkDiEulerIt: Not visited or multiple times visited arc found"); |
---|
52 | } |
---|
53 | } |
---|
54 | |
---|
55 | template <typename Graph> |
---|
56 | void checkEulerIt(const Graph& g, |
---|
57 | const typename Graph::Node& start = INVALID) |
---|
58 | { |
---|
59 | typename Graph::template EdgeMap<int> visitationNumber(g, 0); |
---|
60 | |
---|
61 | EulerIt<Graph> e(g, start); |
---|
62 | if (e == INVALID) return; |
---|
63 | typename Graph::Node firstNode = g.source(typename Graph::Arc(e)); |
---|
64 | typename Graph::Node lastNode = g.target(typename Graph::Arc(e)); |
---|
65 | if (start != INVALID) { |
---|
66 | check(firstNode == start, "checkEulerIt: Wrong first node"); |
---|
67 | } |
---|
68 | |
---|
69 | for (; e != INVALID; ++e) { |
---|
70 | if (e != INVALID) lastNode = g.target(typename Graph::Arc(e)); |
---|
71 | ++visitationNumber[e]; |
---|
72 | } |
---|
73 | |
---|
74 | check(firstNode == lastNode, |
---|
75 | "checkEulerIt: First and last nodes are not the same"); |
---|
76 | |
---|
77 | for (typename Graph::EdgeIt e(g); e != INVALID; ++e) |
---|
78 | { |
---|
79 | check(visitationNumber[e] == 1, |
---|
80 | "checkEulerIt: Not visited or multiple times visited edge found"); |
---|
81 | } |
---|
82 | } |
---|
83 | |
---|
84 | int main() |
---|
85 | { |
---|
86 | typedef ListDigraph Digraph; |
---|
87 | typedef Undirector<Digraph> Graph; |
---|
88 | |
---|
89 | { |
---|
90 | Digraph d; |
---|
91 | Graph g(d); |
---|
92 | |
---|
93 | checkDiEulerIt(d); |
---|
94 | checkDiEulerIt(g); |
---|
95 | checkEulerIt(g); |
---|
96 | |
---|
97 | check(eulerian(d), "This graph is Eulerian"); |
---|
98 | check(eulerian(g), "This graph is Eulerian"); |
---|
99 | } |
---|
100 | { |
---|
101 | Digraph d; |
---|
102 | Graph g(d); |
---|
103 | Digraph::Node n = d.addNode(); |
---|
104 | ::lemon::ignore_unused_variable_warning(n); |
---|
105 | |
---|
106 | checkDiEulerIt(d); |
---|
107 | checkDiEulerIt(g); |
---|
108 | checkEulerIt(g); |
---|
109 | |
---|
110 | check(eulerian(d), "This graph is Eulerian"); |
---|
111 | check(eulerian(g), "This graph is Eulerian"); |
---|
112 | } |
---|
113 | { |
---|
114 | Digraph d; |
---|
115 | Graph g(d); |
---|
116 | Digraph::Node n = d.addNode(); |
---|
117 | d.addArc(n, n); |
---|
118 | |
---|
119 | checkDiEulerIt(d); |
---|
120 | checkDiEulerIt(g); |
---|
121 | checkEulerIt(g); |
---|
122 | |
---|
123 | check(eulerian(d), "This graph is Eulerian"); |
---|
124 | check(eulerian(g), "This graph is Eulerian"); |
---|
125 | } |
---|
126 | { |
---|
127 | Digraph d; |
---|
128 | Graph g(d); |
---|
129 | Digraph::Node n1 = d.addNode(); |
---|
130 | Digraph::Node n2 = d.addNode(); |
---|
131 | Digraph::Node n3 = d.addNode(); |
---|
132 | |
---|
133 | d.addArc(n1, n2); |
---|
134 | d.addArc(n2, n1); |
---|
135 | d.addArc(n2, n3); |
---|
136 | d.addArc(n3, n2); |
---|
137 | |
---|
138 | checkDiEulerIt(d); |
---|
139 | checkDiEulerIt(d, n2); |
---|
140 | checkDiEulerIt(g); |
---|
141 | checkDiEulerIt(g, n2); |
---|
142 | checkEulerIt(g); |
---|
143 | checkEulerIt(g, n2); |
---|
144 | |
---|
145 | check(eulerian(d), "This graph is Eulerian"); |
---|
146 | check(eulerian(g), "This graph is Eulerian"); |
---|
147 | } |
---|
148 | { |
---|
149 | Digraph d; |
---|
150 | Graph g(d); |
---|
151 | Digraph::Node n1 = d.addNode(); |
---|
152 | Digraph::Node n2 = d.addNode(); |
---|
153 | Digraph::Node n3 = d.addNode(); |
---|
154 | Digraph::Node n4 = d.addNode(); |
---|
155 | Digraph::Node n5 = d.addNode(); |
---|
156 | Digraph::Node n6 = d.addNode(); |
---|
157 | |
---|
158 | d.addArc(n1, n2); |
---|
159 | d.addArc(n2, n4); |
---|
160 | d.addArc(n1, n3); |
---|
161 | d.addArc(n3, n4); |
---|
162 | d.addArc(n4, n1); |
---|
163 | d.addArc(n3, n5); |
---|
164 | d.addArc(n5, n2); |
---|
165 | d.addArc(n4, n6); |
---|
166 | d.addArc(n2, n6); |
---|
167 | d.addArc(n6, n1); |
---|
168 | d.addArc(n6, n3); |
---|
169 | |
---|
170 | checkDiEulerIt(d); |
---|
171 | checkDiEulerIt(d, n1); |
---|
172 | checkDiEulerIt(d, n5); |
---|
173 | |
---|
174 | checkDiEulerIt(g); |
---|
175 | checkDiEulerIt(g, n1); |
---|
176 | checkDiEulerIt(g, n5); |
---|
177 | checkEulerIt(g); |
---|
178 | checkEulerIt(g, n1); |
---|
179 | checkEulerIt(g, n5); |
---|
180 | |
---|
181 | check(eulerian(d), "This graph is Eulerian"); |
---|
182 | check(eulerian(g), "This graph is Eulerian"); |
---|
183 | } |
---|
184 | { |
---|
185 | Digraph d; |
---|
186 | Graph g(d); |
---|
187 | Digraph::Node n0 = d.addNode(); |
---|
188 | Digraph::Node n1 = d.addNode(); |
---|
189 | Digraph::Node n2 = d.addNode(); |
---|
190 | Digraph::Node n3 = d.addNode(); |
---|
191 | Digraph::Node n4 = d.addNode(); |
---|
192 | Digraph::Node n5 = d.addNode(); |
---|
193 | ::lemon::ignore_unused_variable_warning(n0,n4,n5); |
---|
194 | |
---|
195 | d.addArc(n1, n2); |
---|
196 | d.addArc(n2, n3); |
---|
197 | d.addArc(n3, n1); |
---|
198 | |
---|
199 | checkDiEulerIt(d); |
---|
200 | checkDiEulerIt(d, n2); |
---|
201 | |
---|
202 | checkDiEulerIt(g); |
---|
203 | checkDiEulerIt(g, n2); |
---|
204 | checkEulerIt(g); |
---|
205 | checkEulerIt(g, n2); |
---|
206 | |
---|
207 | check(!eulerian(d), "This graph is not Eulerian"); |
---|
208 | check(!eulerian(g), "This graph is not Eulerian"); |
---|
209 | } |
---|
210 | { |
---|
211 | Digraph d; |
---|
212 | Graph g(d); |
---|
213 | Digraph::Node n1 = d.addNode(); |
---|
214 | Digraph::Node n2 = d.addNode(); |
---|
215 | Digraph::Node n3 = d.addNode(); |
---|
216 | |
---|
217 | d.addArc(n1, n2); |
---|
218 | d.addArc(n2, n3); |
---|
219 | |
---|
220 | check(!eulerian(d), "This graph is not Eulerian"); |
---|
221 | check(!eulerian(g), "This graph is not Eulerian"); |
---|
222 | } |
---|
223 | |
---|
224 | return 0; |
---|
225 | } |
---|