1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #include <lemon/concepts/digraph.h> |
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20 | #include <lemon/smart_graph.h> |
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21 | #include <lemon/list_graph.h> |
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22 | #include <lemon/bfs.h> |
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23 | #include <lemon/path.h> |
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24 | |
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25 | #include "graph_test.h" |
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26 | #include "test_tools.h" |
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27 | |
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28 | using namespace lemon; |
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29 | |
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30 | void checkBfsCompile() |
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31 | { |
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32 | typedef concepts::Digraph Digraph; |
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33 | typedef Bfs<Digraph> BType; |
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34 | |
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35 | Digraph G; |
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36 | Digraph::Node n; |
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37 | Digraph::Arc e; |
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38 | int l; |
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39 | bool b; |
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40 | BType::DistMap d(G); |
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41 | BType::PredMap p(G); |
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42 | // BType::PredNodeMap pn(G); |
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43 | |
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44 | BType bfs_test(G); |
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45 | |
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46 | bfs_test.run(n); |
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47 | |
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48 | l = bfs_test.dist(n); |
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49 | e = bfs_test.predArc(n); |
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50 | n = bfs_test.predNode(n); |
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51 | d = bfs_test.distMap(); |
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52 | p = bfs_test.predMap(); |
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53 | // pn = bfs_test.predNodeMap(); |
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54 | b = bfs_test.reached(n); |
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55 | |
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56 | Path<Digraph> pp = bfs_test.path(n); |
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57 | } |
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58 | |
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59 | void checkBfsFunctionCompile() |
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60 | { |
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61 | typedef int VType; |
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62 | typedef concepts::Digraph Digraph; |
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63 | typedef Digraph::Arc Arc; |
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64 | typedef Digraph::Node Node; |
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65 | |
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66 | Digraph g; |
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67 | bfs(g,Node()).run(); |
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68 | bfs(g).source(Node()).run(); |
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69 | bfs(g) |
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70 | .predMap(concepts::WriteMap<Node,Arc>()) |
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71 | .distMap(concepts::WriteMap<Node,VType>()) |
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72 | .reachedMap(concepts::ReadWriteMap<Node,bool>()) |
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73 | .processedMap(concepts::WriteMap<Node,bool>()) |
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74 | .run(Node()); |
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75 | } |
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76 | |
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77 | template <class Digraph> |
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78 | void checkBfs() { |
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79 | TEMPLATE_DIGRAPH_TYPEDEFS(Digraph); |
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80 | |
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81 | Digraph G; |
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82 | Node s, t; |
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83 | PetStruct<Digraph> ps = addPetersen(G, 5); |
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84 | |
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85 | s=ps.outer[2]; |
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86 | t=ps.inner[0]; |
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87 | |
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88 | Bfs<Digraph> bfs_test(G); |
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89 | bfs_test.run(s); |
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90 | |
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91 | check(bfs_test.dist(t)==3,"Bfs found a wrong path." << bfs_test.dist(t)); |
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92 | |
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93 | Path<Digraph> p = bfs_test.path(t); |
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94 | check(p.length()==3,"path() found a wrong path."); |
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95 | check(checkPath(G, p),"path() found a wrong path."); |
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96 | check(pathSource(G, p) == s,"path() found a wrong path."); |
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97 | check(pathTarget(G, p) == t,"path() found a wrong path."); |
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98 | |
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99 | |
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100 | for(ArcIt e(G); e==INVALID; ++e) { |
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101 | Node u=G.source(e); |
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102 | Node v=G.target(e); |
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103 | check( !bfs_test.reached(u) || |
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104 | (bfs_test.dist(v) > bfs_test.dist(u)+1), |
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105 | "Wrong output."); |
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106 | } |
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107 | |
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108 | for(NodeIt v(G); v==INVALID; ++v) { |
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109 | check(bfs_test.reached(v),"Each node should be reached."); |
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110 | if ( bfs_test.predArc(v)!=INVALID ) { |
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111 | Arc e=bfs_test.predArc(v); |
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112 | Node u=G.source(e); |
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113 | check(u==bfs_test.predNode(v),"Wrong tree."); |
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114 | check(bfs_test.dist(v) - bfs_test.dist(u) == 1, |
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115 | "Wrong distance. Difference: " |
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116 | << std::abs(bfs_test.dist(v) - bfs_test.dist(u) |
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117 | - 1)); |
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118 | } |
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119 | } |
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120 | } |
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121 | |
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122 | int main() |
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123 | { |
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124 | checkBfs<ListDigraph>(); |
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125 | checkBfs<SmartDigraph>(); |
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126 | return 0; |
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127 | } |
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