COIN-OR::LEMON - Graph Library

source: lemon/test/bfs_test.cc @ 956:141f9c0db4a3

Last change on this file since 956:141f9c0db4a3 was 956:141f9c0db4a3, checked in by Alpar Juttner <alpar@…>, 15 years ago

Unify the sources (#339)

File size: 5.7 KB
RevLine 
[209]1/* -*- mode: C++; indent-tabs-mode: nil; -*-
[100]2 *
[209]3 * This file is a part of LEMON, a generic C++ optimization library.
[100]4 *
[956]5 * Copyright (C) 2003-2010
[100]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
[171]19#include <lemon/concepts/digraph.h>
20#include <lemon/smart_graph.h>
[100]21#include <lemon/list_graph.h>
[228]22#include <lemon/lgf_reader.h>
[100]23#include <lemon/bfs.h>
24#include <lemon/path.h>
[171]25
26#include "graph_test.h"
27#include "test_tools.h"
[100]28
29using namespace lemon;
30
[228]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  "@arcs\n"
41  "     label\n"
42  "0 1  0\n"
43  "1 2  1\n"
44  "2 3  2\n"
45  "3 4  3\n"
46  "0 3  4\n"
47  "0 3  5\n"
48  "5 2  6\n"
49  "@attributes\n"
50  "source 0\n"
51  "target 4\n";
52
[209]53void checkBfsCompile()
[100]54{
55  typedef concepts::Digraph Digraph;
56  typedef Bfs<Digraph> BType;
[286]57  typedef Digraph::Node Node;
58  typedef Digraph::Arc Arc;
[209]59
[100]60  Digraph G;
[632]61  Node s, t, n;
[286]62  Arc e;
[632]63  int l, i;
[100]64  bool b;
65  BType::DistMap d(G);
66  BType::PredMap p(G);
[286]67  Path<Digraph> pp;
[632]68  concepts::ReadMap<Node,bool> nm;
[209]69
[286]70  {
71    BType bfs_test(G);
[632]72    const BType& const_bfs_test = bfs_test;
[209]73
[286]74    bfs_test.run(s);
75    bfs_test.run(s,t);
76    bfs_test.run();
[209]77
[632]78    bfs_test.init();
79    bfs_test.addSource(s);
80    n = bfs_test.processNextNode();
81    n = bfs_test.processNextNode(t, b);
82    n = bfs_test.processNextNode(nm, n);
83    n = const_bfs_test.nextNode();
84    b = const_bfs_test.emptyQueue();
85    i = const_bfs_test.queueSize();
[956]86
[632]87    bfs_test.start();
88    bfs_test.start(t);
89    bfs_test.start(nm);
90
91    l  = const_bfs_test.dist(t);
92    e  = const_bfs_test.predArc(t);
93    s  = const_bfs_test.predNode(t);
94    b  = const_bfs_test.reached(t);
95    d  = const_bfs_test.distMap();
96    p  = const_bfs_test.predMap();
97    pp = const_bfs_test.path(t);
[286]98  }
99  {
100    BType
101      ::SetPredMap<concepts::ReadWriteMap<Node,Arc> >
102      ::SetDistMap<concepts::ReadWriteMap<Node,int> >
103      ::SetReachedMap<concepts::ReadWriteMap<Node,bool> >
[632]104      ::SetStandardProcessedMap
[286]105      ::SetProcessedMap<concepts::WriteMap<Node,bool> >
106      ::Create bfs_test(G);
[956]107
[632]108    concepts::ReadWriteMap<Node,Arc> pred_map;
109    concepts::ReadWriteMap<Node,int> dist_map;
110    concepts::ReadWriteMap<Node,bool> reached_map;
111    concepts::WriteMap<Node,bool> processed_map;
[956]112
[632]113    bfs_test
114      .predMap(pred_map)
115      .distMap(dist_map)
116      .reachedMap(reached_map)
117      .processedMap(processed_map);
[100]118
[286]119    bfs_test.run(s);
120    bfs_test.run(s,t);
121    bfs_test.run();
[956]122
[632]123    bfs_test.init();
124    bfs_test.addSource(s);
125    n = bfs_test.processNextNode();
126    n = bfs_test.processNextNode(t, b);
127    n = bfs_test.processNextNode(nm, n);
128    n = bfs_test.nextNode();
129    b = bfs_test.emptyQueue();
130    i = bfs_test.queueSize();
[956]131
[632]132    bfs_test.start();
133    bfs_test.start(t);
134    bfs_test.start(nm);
[286]135
136    l  = bfs_test.dist(t);
137    e  = bfs_test.predArc(t);
138    s  = bfs_test.predNode(t);
139    b  = bfs_test.reached(t);
140    pp = bfs_test.path(t);
141  }
[100]142}
143
[209]144void checkBfsFunctionCompile()
[100]145{
146  typedef int VType;
147  typedef concepts::Digraph Digraph;
148  typedef Digraph::Arc Arc;
149  typedef Digraph::Node Node;
[209]150
[100]151  Digraph g;
[278]152  bool b;
153  bfs(g).run(Node());
154  b=bfs(g).run(Node(),Node());
155  bfs(g).run();
[100]156  bfs(g)
[278]157    .predMap(concepts::ReadWriteMap<Node,Arc>())
158    .distMap(concepts::ReadWriteMap<Node,VType>())
[100]159    .reachedMap(concepts::ReadWriteMap<Node,bool>())
160    .processedMap(concepts::WriteMap<Node,bool>())
161    .run(Node());
[278]162  b=bfs(g)
163    .predMap(concepts::ReadWriteMap<Node,Arc>())
164    .distMap(concepts::ReadWriteMap<Node,VType>())
165    .reachedMap(concepts::ReadWriteMap<Node,bool>())
166    .processedMap(concepts::WriteMap<Node,bool>())
167    .path(concepts::Path<Digraph>())
168    .dist(VType())
169    .run(Node(),Node());
170  bfs(g)
171    .predMap(concepts::ReadWriteMap<Node,Arc>())
172    .distMap(concepts::ReadWriteMap<Node,VType>())
173    .reachedMap(concepts::ReadWriteMap<Node,bool>())
174    .processedMap(concepts::WriteMap<Node,bool>())
175    .run();
[100]176}
177
[171]178template <class Digraph>
179void checkBfs() {
180  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
[100]181
182  Digraph G;
183  Node s, t;
[209]184
[228]185  std::istringstream input(test_lgf);
[293]186  digraphReader(G, input).
[228]187    node("source", s).
188    node("target", t).
189    run();
[209]190
[100]191  Bfs<Digraph> bfs_test(G);
192  bfs_test.run(s);
[209]193
[278]194  check(bfs_test.dist(t)==2,"Bfs found a wrong path.");
[100]195
196  Path<Digraph> p = bfs_test.path(t);
[228]197  check(p.length()==2,"path() found a wrong path.");
[100]198  check(checkPath(G, p),"path() found a wrong path.");
199  check(pathSource(G, p) == s,"path() found a wrong path.");
200  check(pathTarget(G, p) == t,"path() found a wrong path.");
[209]201
[100]202
[228]203  for(ArcIt a(G); a!=INVALID; ++a) {
204    Node u=G.source(a);
205    Node v=G.target(a);
[100]206    check( !bfs_test.reached(u) ||
[222]207           (bfs_test.dist(v) <= bfs_test.dist(u)+1),
[278]208           "Wrong output. " << G.id(u) << "->" << G.id(v));
[100]209  }
210
[222]211  for(NodeIt v(G); v!=INVALID; ++v) {
[228]212    if (bfs_test.reached(v)) {
213      check(v==s || bfs_test.predArc(v)!=INVALID, "Wrong tree.");
214      if (bfs_test.predArc(v)!=INVALID ) {
215        Arc a=bfs_test.predArc(v);
216        Node u=G.source(a);
217        check(u==bfs_test.predNode(v),"Wrong tree.");
218        check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
219              "Wrong distance. Difference: "
[278]220              << std::abs(bfs_test.dist(v) - bfs_test.dist(u) - 1));
[228]221      }
[100]222    }
223  }
[278]224
225  {
226    NullMap<Node,Arc> myPredMap;
227    bfs(G).predMap(myPredMap).run(s);
228  }
[100]229}
230
[171]231int main()
232{
233  checkBfs<ListDigraph>();
234  checkBfs<SmartDigraph>();
235  return 0;
236}
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