1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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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) 2003-2009 |
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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/graph.h> |
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20 | #include <lemon/list_graph.h> |
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21 | #include <lemon/smart_graph.h> |
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22 | #include <lemon/full_graph.h> |
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23 | #include <lemon/grid_graph.h> |
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24 | #include <lemon/hypercube_graph.h> |
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25 | |
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26 | #include "test_tools.h" |
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27 | #include "graph_test.h" |
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28 | |
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29 | using namespace lemon; |
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30 | using namespace lemon::concepts; |
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31 | |
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32 | template <class Graph> |
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33 | void checkGraphBuild() { |
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34 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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35 | |
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36 | Graph G; |
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37 | checkGraphNodeList(G, 0); |
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38 | checkGraphEdgeList(G, 0); |
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39 | checkGraphArcList(G, 0); |
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40 | |
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41 | G.reserveNode(3); |
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42 | G.reserveEdge(3); |
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43 | |
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44 | Node |
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45 | n1 = G.addNode(), |
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46 | n2 = G.addNode(), |
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47 | n3 = G.addNode(); |
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48 | checkGraphNodeList(G, 3); |
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49 | checkGraphEdgeList(G, 0); |
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50 | checkGraphArcList(G, 0); |
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51 | |
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52 | Edge e1 = G.addEdge(n1, n2); |
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53 | check((G.u(e1) == n1 && G.v(e1) == n2) || (G.u(e1) == n2 && G.v(e1) == n1), |
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54 | "Wrong edge"); |
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55 | |
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56 | checkGraphNodeList(G, 3); |
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57 | checkGraphEdgeList(G, 1); |
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58 | checkGraphArcList(G, 2); |
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59 | |
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60 | checkGraphIncEdgeArcLists(G, n1, 1); |
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61 | checkGraphIncEdgeArcLists(G, n2, 1); |
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62 | checkGraphIncEdgeArcLists(G, n3, 0); |
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63 | |
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64 | checkGraphConEdgeList(G, 1); |
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65 | checkGraphConArcList(G, 2); |
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66 | |
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67 | Edge e2 = G.addEdge(n2, n1), |
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68 | e3 = G.addEdge(n2, n3); |
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69 | |
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70 | checkGraphNodeList(G, 3); |
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71 | checkGraphEdgeList(G, 3); |
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72 | checkGraphArcList(G, 6); |
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73 | |
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74 | checkGraphIncEdgeArcLists(G, n1, 2); |
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75 | checkGraphIncEdgeArcLists(G, n2, 3); |
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76 | checkGraphIncEdgeArcLists(G, n3, 1); |
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77 | |
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78 | checkGraphConEdgeList(G, 3); |
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79 | checkGraphConArcList(G, 6); |
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80 | |
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81 | checkArcDirections(G); |
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82 | |
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83 | checkNodeIds(G); |
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84 | checkArcIds(G); |
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85 | checkEdgeIds(G); |
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86 | checkGraphNodeMap(G); |
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87 | checkGraphArcMap(G); |
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88 | checkGraphEdgeMap(G); |
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89 | } |
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90 | |
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91 | template <class Graph> |
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92 | void checkGraphAlter() { |
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93 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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94 | |
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95 | Graph G; |
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96 | Node n1 = G.addNode(), n2 = G.addNode(), |
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97 | n3 = G.addNode(), n4 = G.addNode(); |
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98 | Edge e1 = G.addEdge(n1, n2), e2 = G.addEdge(n2, n1), |
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99 | e3 = G.addEdge(n2, n3), e4 = G.addEdge(n1, n4), |
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100 | e5 = G.addEdge(n4, n3); |
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101 | |
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102 | checkGraphNodeList(G, 4); |
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103 | checkGraphEdgeList(G, 5); |
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104 | checkGraphArcList(G, 10); |
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105 | |
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106 | // Check changeU() and changeV() |
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107 | if (G.u(e2) == n2) { |
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108 | G.changeU(e2, n3); |
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109 | } else { |
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110 | G.changeV(e2, n3); |
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111 | } |
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112 | |
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113 | checkGraphNodeList(G, 4); |
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114 | checkGraphEdgeList(G, 5); |
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115 | checkGraphArcList(G, 10); |
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116 | |
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117 | checkGraphIncEdgeArcLists(G, n1, 3); |
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118 | checkGraphIncEdgeArcLists(G, n2, 2); |
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119 | checkGraphIncEdgeArcLists(G, n3, 3); |
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120 | checkGraphIncEdgeArcLists(G, n4, 2); |
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121 | |
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122 | checkGraphConEdgeList(G, 5); |
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123 | checkGraphConArcList(G, 10); |
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124 | |
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125 | if (G.u(e2) == n1) { |
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126 | G.changeU(e2, n2); |
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127 | } else { |
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128 | G.changeV(e2, n2); |
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129 | } |
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130 | |
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131 | checkGraphNodeList(G, 4); |
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132 | checkGraphEdgeList(G, 5); |
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133 | checkGraphArcList(G, 10); |
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134 | |
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135 | checkGraphIncEdgeArcLists(G, n1, 2); |
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136 | checkGraphIncEdgeArcLists(G, n2, 3); |
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137 | checkGraphIncEdgeArcLists(G, n3, 3); |
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138 | checkGraphIncEdgeArcLists(G, n4, 2); |
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139 | |
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140 | checkGraphConEdgeList(G, 5); |
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141 | checkGraphConArcList(G, 10); |
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142 | |
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143 | // Check contract() |
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144 | G.contract(n1, n4, false); |
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145 | |
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146 | checkGraphNodeList(G, 3); |
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147 | checkGraphEdgeList(G, 5); |
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148 | checkGraphArcList(G, 10); |
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149 | |
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150 | checkGraphIncEdgeArcLists(G, n1, 4); |
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151 | checkGraphIncEdgeArcLists(G, n2, 3); |
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152 | checkGraphIncEdgeArcLists(G, n3, 3); |
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153 | |
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154 | checkGraphConEdgeList(G, 5); |
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155 | checkGraphConArcList(G, 10); |
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156 | |
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157 | G.contract(n2, n3); |
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158 | |
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159 | checkGraphNodeList(G, 2); |
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160 | checkGraphEdgeList(G, 3); |
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161 | checkGraphArcList(G, 6); |
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162 | |
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163 | checkGraphIncEdgeArcLists(G, n1, 4); |
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164 | checkGraphIncEdgeArcLists(G, n2, 2); |
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165 | |
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166 | checkGraphConEdgeList(G, 3); |
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167 | checkGraphConArcList(G, 6); |
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168 | } |
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169 | |
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170 | template <class Graph> |
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171 | void checkGraphErase() { |
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172 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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173 | |
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174 | Graph G; |
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175 | Node n1 = G.addNode(), n2 = G.addNode(), |
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176 | n3 = G.addNode(), n4 = G.addNode(); |
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177 | Edge e1 = G.addEdge(n1, n2), e2 = G.addEdge(n2, n1), |
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178 | e3 = G.addEdge(n2, n3), e4 = G.addEdge(n1, n4), |
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179 | e5 = G.addEdge(n4, n3); |
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180 | |
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181 | // Check edge deletion |
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182 | G.erase(e2); |
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183 | |
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184 | checkGraphNodeList(G, 4); |
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185 | checkGraphEdgeList(G, 4); |
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186 | checkGraphArcList(G, 8); |
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187 | |
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188 | checkGraphIncEdgeArcLists(G, n1, 2); |
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189 | checkGraphIncEdgeArcLists(G, n2, 2); |
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190 | checkGraphIncEdgeArcLists(G, n3, 2); |
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191 | checkGraphIncEdgeArcLists(G, n4, 2); |
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192 | |
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193 | checkGraphConEdgeList(G, 4); |
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194 | checkGraphConArcList(G, 8); |
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195 | |
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196 | // Check node deletion |
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197 | G.erase(n3); |
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198 | |
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199 | checkGraphNodeList(G, 3); |
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200 | checkGraphEdgeList(G, 2); |
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201 | checkGraphArcList(G, 4); |
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202 | |
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203 | checkGraphIncEdgeArcLists(G, n1, 2); |
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204 | checkGraphIncEdgeArcLists(G, n2, 1); |
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205 | checkGraphIncEdgeArcLists(G, n4, 1); |
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206 | |
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207 | checkGraphConEdgeList(G, 2); |
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208 | checkGraphConArcList(G, 4); |
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209 | } |
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210 | |
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211 | |
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212 | template <class Graph> |
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213 | void checkGraphSnapshot() { |
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214 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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215 | |
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216 | Graph G; |
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217 | Node n1 = G.addNode(), n2 = G.addNode(), n3 = G.addNode(); |
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218 | Edge e1 = G.addEdge(n1, n2), e2 = G.addEdge(n2, n1), |
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219 | e3 = G.addEdge(n2, n3); |
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220 | |
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221 | checkGraphNodeList(G, 3); |
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222 | checkGraphEdgeList(G, 3); |
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223 | checkGraphArcList(G, 6); |
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224 | |
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225 | typename Graph::Snapshot snapshot(G); |
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226 | |
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227 | Node n = G.addNode(); |
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228 | G.addEdge(n3, n); |
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229 | G.addEdge(n, n3); |
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230 | G.addEdge(n3, n2); |
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231 | |
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232 | checkGraphNodeList(G, 4); |
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233 | checkGraphEdgeList(G, 6); |
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234 | checkGraphArcList(G, 12); |
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235 | |
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236 | snapshot.restore(); |
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237 | |
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238 | checkGraphNodeList(G, 3); |
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239 | checkGraphEdgeList(G, 3); |
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240 | checkGraphArcList(G, 6); |
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241 | |
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242 | checkGraphIncEdgeArcLists(G, n1, 2); |
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243 | checkGraphIncEdgeArcLists(G, n2, 3); |
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244 | checkGraphIncEdgeArcLists(G, n3, 1); |
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245 | |
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246 | checkGraphConEdgeList(G, 3); |
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247 | checkGraphConArcList(G, 6); |
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248 | |
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249 | checkNodeIds(G); |
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250 | checkEdgeIds(G); |
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251 | checkArcIds(G); |
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252 | checkGraphNodeMap(G); |
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253 | checkGraphEdgeMap(G); |
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254 | checkGraphArcMap(G); |
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255 | |
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256 | G.addNode(); |
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257 | snapshot.save(G); |
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258 | |
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259 | G.addEdge(G.addNode(), G.addNode()); |
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260 | |
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261 | snapshot.restore(); |
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262 | |
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263 | checkGraphNodeList(G, 4); |
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264 | checkGraphEdgeList(G, 3); |
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265 | checkGraphArcList(G, 6); |
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266 | } |
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267 | |
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268 | void checkFullGraph(int num) { |
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269 | typedef FullGraph Graph; |
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270 | GRAPH_TYPEDEFS(Graph); |
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271 | |
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272 | Graph G(num); |
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273 | check(G.nodeNum() == num && G.edgeNum() == num * (num - 1) / 2, |
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274 | "Wrong size"); |
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275 | |
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276 | G.resize(num); |
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277 | check(G.nodeNum() == num && G.edgeNum() == num * (num - 1) / 2, |
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278 | "Wrong size"); |
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279 | |
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280 | checkGraphNodeList(G, num); |
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281 | checkGraphEdgeList(G, num * (num - 1) / 2); |
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282 | |
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283 | for (NodeIt n(G); n != INVALID; ++n) { |
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284 | checkGraphOutArcList(G, n, num - 1); |
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285 | checkGraphInArcList(G, n, num - 1); |
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286 | checkGraphIncEdgeList(G, n, num - 1); |
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287 | } |
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288 | |
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289 | checkGraphConArcList(G, num * (num - 1)); |
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290 | checkGraphConEdgeList(G, num * (num - 1) / 2); |
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291 | |
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292 | checkArcDirections(G); |
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293 | |
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294 | checkNodeIds(G); |
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295 | checkArcIds(G); |
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296 | checkEdgeIds(G); |
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297 | checkGraphNodeMap(G); |
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298 | checkGraphArcMap(G); |
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299 | checkGraphEdgeMap(G); |
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300 | |
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301 | |
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302 | for (int i = 0; i < G.nodeNum(); ++i) { |
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303 | check(G.index(G(i)) == i, "Wrong index"); |
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304 | } |
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305 | |
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306 | for (NodeIt u(G); u != INVALID; ++u) { |
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307 | for (NodeIt v(G); v != INVALID; ++v) { |
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308 | Edge e = G.edge(u, v); |
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309 | Arc a = G.arc(u, v); |
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310 | if (u == v) { |
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311 | check(e == INVALID, "Wrong edge lookup"); |
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312 | check(a == INVALID, "Wrong arc lookup"); |
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313 | } else { |
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314 | check((G.u(e) == u && G.v(e) == v) || |
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315 | (G.u(e) == v && G.v(e) == u), "Wrong edge lookup"); |
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316 | check(G.source(a) == u && G.target(a) == v, "Wrong arc lookup"); |
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317 | } |
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318 | } |
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319 | } |
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320 | } |
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321 | |
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322 | void checkConcepts() { |
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323 | { // Checking graph components |
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324 | checkConcept<BaseGraphComponent, BaseGraphComponent >(); |
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325 | |
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326 | checkConcept<IDableGraphComponent<>, |
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327 | IDableGraphComponent<> >(); |
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328 | |
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329 | checkConcept<IterableGraphComponent<>, |
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330 | IterableGraphComponent<> >(); |
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331 | |
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332 | checkConcept<MappableGraphComponent<>, |
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333 | MappableGraphComponent<> >(); |
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334 | } |
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335 | { // Checking skeleton graph |
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336 | checkConcept<Graph, Graph>(); |
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337 | } |
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338 | { // Checking ListGraph |
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339 | checkConcept<Graph, ListGraph>(); |
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340 | checkConcept<AlterableGraphComponent<>, ListGraph>(); |
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341 | checkConcept<ExtendableGraphComponent<>, ListGraph>(); |
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342 | checkConcept<ClearableGraphComponent<>, ListGraph>(); |
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343 | checkConcept<ErasableGraphComponent<>, ListGraph>(); |
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344 | } |
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345 | { // Checking SmartGraph |
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346 | checkConcept<Graph, SmartGraph>(); |
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347 | checkConcept<AlterableGraphComponent<>, SmartGraph>(); |
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348 | checkConcept<ExtendableGraphComponent<>, SmartGraph>(); |
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349 | checkConcept<ClearableGraphComponent<>, SmartGraph>(); |
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350 | } |
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351 | { // Checking FullGraph |
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352 | checkConcept<Graph, FullGraph>(); |
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353 | } |
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354 | { // Checking GridGraph |
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355 | checkConcept<Graph, GridGraph>(); |
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356 | } |
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357 | { // Checking HypercubeGraph |
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358 | checkConcept<Graph, HypercubeGraph>(); |
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359 | } |
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360 | } |
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361 | |
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362 | template <typename Graph> |
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363 | void checkGraphValidity() { |
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364 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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365 | Graph g; |
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366 | |
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367 | Node |
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368 | n1 = g.addNode(), |
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369 | n2 = g.addNode(), |
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370 | n3 = g.addNode(); |
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371 | |
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372 | Edge |
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373 | e1 = g.addEdge(n1, n2), |
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374 | e2 = g.addEdge(n2, n3); |
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375 | |
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376 | check(g.valid(n1), "Wrong validity check"); |
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377 | check(g.valid(e1), "Wrong validity check"); |
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378 | check(g.valid(g.direct(e1, true)), "Wrong validity check"); |
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379 | |
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380 | check(!g.valid(g.nodeFromId(-1)), "Wrong validity check"); |
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381 | check(!g.valid(g.edgeFromId(-1)), "Wrong validity check"); |
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382 | check(!g.valid(g.arcFromId(-1)), "Wrong validity check"); |
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383 | } |
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384 | |
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385 | template <typename Graph> |
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386 | void checkGraphValidityErase() { |
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387 | TEMPLATE_GRAPH_TYPEDEFS(Graph); |
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388 | Graph g; |
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389 | |
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390 | Node |
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391 | n1 = g.addNode(), |
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392 | n2 = g.addNode(), |
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393 | n3 = g.addNode(); |
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394 | |
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395 | Edge |
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396 | e1 = g.addEdge(n1, n2), |
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397 | e2 = g.addEdge(n2, n3); |
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398 | |
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399 | check(g.valid(n1), "Wrong validity check"); |
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400 | check(g.valid(e1), "Wrong validity check"); |
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401 | check(g.valid(g.direct(e1, true)), "Wrong validity check"); |
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402 | |
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403 | g.erase(n1); |
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404 | |
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405 | check(!g.valid(n1), "Wrong validity check"); |
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406 | check(g.valid(n2), "Wrong validity check"); |
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407 | check(g.valid(n3), "Wrong validity check"); |
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408 | check(!g.valid(e1), "Wrong validity check"); |
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409 | check(g.valid(e2), "Wrong validity check"); |
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410 | |
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411 | check(!g.valid(g.nodeFromId(-1)), "Wrong validity check"); |
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412 | check(!g.valid(g.edgeFromId(-1)), "Wrong validity check"); |
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413 | check(!g.valid(g.arcFromId(-1)), "Wrong validity check"); |
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414 | } |
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415 | |
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416 | void checkGridGraph(int width, int height) { |
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417 | typedef GridGraph Graph; |
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418 | GRAPH_TYPEDEFS(Graph); |
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419 | Graph G(width, height); |
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420 | |
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421 | check(G.width() == width, "Wrong column number"); |
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422 | check(G.height() == height, "Wrong row number"); |
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423 | |
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424 | G.resize(width, height); |
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425 | check(G.width() == width, "Wrong column number"); |
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426 | check(G.height() == height, "Wrong row number"); |
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427 | |
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428 | for (int i = 0; i < width; ++i) { |
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429 | for (int j = 0; j < height; ++j) { |
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430 | check(G.col(G(i, j)) == i, "Wrong column"); |
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431 | check(G.row(G(i, j)) == j, "Wrong row"); |
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432 | check(G.pos(G(i, j)).x == i, "Wrong column"); |
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433 | check(G.pos(G(i, j)).y == j, "Wrong row"); |
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434 | } |
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435 | } |
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436 | |
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437 | for (int j = 0; j < height; ++j) { |
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438 | for (int i = 0; i < width - 1; ++i) { |
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439 | check(G.source(G.right(G(i, j))) == G(i, j), "Wrong right"); |
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440 | check(G.target(G.right(G(i, j))) == G(i + 1, j), "Wrong right"); |
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441 | } |
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442 | check(G.right(G(width - 1, j)) == INVALID, "Wrong right"); |
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443 | } |
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444 | |
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445 | for (int j = 0; j < height; ++j) { |
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446 | for (int i = 1; i < width; ++i) { |
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447 | check(G.source(G.left(G(i, j))) == G(i, j), "Wrong left"); |
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448 | check(G.target(G.left(G(i, j))) == G(i - 1, j), "Wrong left"); |
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449 | } |
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450 | check(G.left(G(0, j)) == INVALID, "Wrong left"); |
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451 | } |
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452 | |
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453 | for (int i = 0; i < width; ++i) { |
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454 | for (int j = 0; j < height - 1; ++j) { |
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455 | check(G.source(G.up(G(i, j))) == G(i, j), "Wrong up"); |
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456 | check(G.target(G.up(G(i, j))) == G(i, j + 1), "Wrong up"); |
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457 | } |
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458 | check(G.up(G(i, height - 1)) == INVALID, "Wrong up"); |
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459 | } |
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460 | |
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461 | for (int i = 0; i < width; ++i) { |
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462 | for (int j = 1; j < height; ++j) { |
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463 | check(G.source(G.down(G(i, j))) == G(i, j), "Wrong down"); |
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464 | check(G.target(G.down(G(i, j))) == G(i, j - 1), "Wrong down"); |
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465 | } |
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466 | check(G.down(G(i, 0)) == INVALID, "Wrong down"); |
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467 | } |
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468 | |
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469 | checkGraphNodeList(G, width * height); |
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470 | checkGraphEdgeList(G, width * (height - 1) + (width - 1) * height); |
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471 | checkGraphArcList(G, 2 * (width * (height - 1) + (width - 1) * height)); |
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472 | |
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473 | for (NodeIt n(G); n != INVALID; ++n) { |
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474 | int nb = 4; |
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475 | if (G.col(n) == 0) --nb; |
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476 | if (G.col(n) == width - 1) --nb; |
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477 | if (G.row(n) == 0) --nb; |
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478 | if (G.row(n) == height - 1) --nb; |
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479 | |
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480 | checkGraphOutArcList(G, n, nb); |
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481 | checkGraphInArcList(G, n, nb); |
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482 | checkGraphIncEdgeList(G, n, nb); |
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483 | } |
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484 | |
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485 | checkArcDirections(G); |
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486 | |
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487 | checkGraphConArcList(G, 2 * (width * (height - 1) + (width - 1) * height)); |
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488 | checkGraphConEdgeList(G, width * (height - 1) + (width - 1) * height); |
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489 | |
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490 | checkNodeIds(G); |
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491 | checkArcIds(G); |
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492 | checkEdgeIds(G); |
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493 | checkGraphNodeMap(G); |
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494 | checkGraphArcMap(G); |
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495 | checkGraphEdgeMap(G); |
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496 | |
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497 | } |
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498 | |
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499 | void checkHypercubeGraph(int dim) { |
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500 | GRAPH_TYPEDEFS(HypercubeGraph); |
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501 | |
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502 | HypercubeGraph G(dim); |
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503 | check(G.dimension() == dim, "Wrong dimension"); |
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504 | |
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505 | G.resize(dim); |
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506 | check(G.dimension() == dim, "Wrong dimension"); |
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507 | |
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508 | checkGraphNodeList(G, 1 << dim); |
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509 | checkGraphEdgeList(G, dim * (1 << (dim-1))); |
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510 | checkGraphArcList(G, dim * (1 << dim)); |
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511 | |
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512 | Node n = G.nodeFromId(dim); |
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513 | |
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514 | for (NodeIt n(G); n != INVALID; ++n) { |
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515 | checkGraphIncEdgeList(G, n, dim); |
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516 | for (IncEdgeIt e(G, n); e != INVALID; ++e) { |
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517 | check( (G.u(e) == n && |
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518 | G.id(G.v(e)) == (G.id(n) ^ (1 << G.dimension(e)))) || |
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519 | (G.v(e) == n && |
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520 | G.id(G.u(e)) == (G.id(n) ^ (1 << G.dimension(e)))), |
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521 | "Wrong edge or wrong dimension"); |
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522 | } |
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523 | |
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524 | checkGraphOutArcList(G, n, dim); |
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525 | for (OutArcIt a(G, n); a != INVALID; ++a) { |
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526 | check(G.source(a) == n && |
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527 | G.id(G.target(a)) == (G.id(n) ^ (1 << G.dimension(a))), |
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528 | "Wrong arc or wrong dimension"); |
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529 | } |
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530 | |
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531 | checkGraphInArcList(G, n, dim); |
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532 | for (InArcIt a(G, n); a != INVALID; ++a) { |
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533 | check(G.target(a) == n && |
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534 | G.id(G.source(a)) == (G.id(n) ^ (1 << G.dimension(a))), |
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535 | "Wrong arc or wrong dimension"); |
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536 | } |
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537 | } |
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538 | |
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539 | checkGraphConArcList(G, (1 << dim) * dim); |
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540 | checkGraphConEdgeList(G, dim * (1 << (dim-1))); |
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541 | |
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542 | checkArcDirections(G); |
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543 | |
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544 | checkNodeIds(G); |
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545 | checkArcIds(G); |
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546 | checkEdgeIds(G); |
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547 | checkGraphNodeMap(G); |
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548 | checkGraphArcMap(G); |
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549 | checkGraphEdgeMap(G); |
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550 | } |
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551 | |
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552 | void checkGraphs() { |
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553 | { // Checking ListGraph |
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554 | checkGraphBuild<ListGraph>(); |
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555 | checkGraphAlter<ListGraph>(); |
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556 | checkGraphErase<ListGraph>(); |
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557 | checkGraphSnapshot<ListGraph>(); |
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558 | checkGraphValidityErase<ListGraph>(); |
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559 | } |
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560 | { // Checking SmartGraph |
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561 | checkGraphBuild<SmartGraph>(); |
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562 | checkGraphSnapshot<SmartGraph>(); |
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563 | checkGraphValidity<SmartGraph>(); |
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564 | } |
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565 | { // Checking FullGraph |
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566 | checkFullGraph(7); |
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567 | checkFullGraph(8); |
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568 | } |
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569 | { // Checking GridGraph |
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570 | checkGridGraph(5, 8); |
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571 | checkGridGraph(8, 5); |
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572 | checkGridGraph(5, 5); |
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573 | checkGridGraph(0, 0); |
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574 | checkGridGraph(1, 1); |
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575 | } |
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576 | { // Checking HypercubeGraph |
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577 | checkHypercubeGraph(1); |
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578 | checkHypercubeGraph(2); |
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579 | checkHypercubeGraph(3); |
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580 | checkHypercubeGraph(4); |
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581 | } |
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582 | } |
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583 | |
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584 | int main() { |
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585 | checkConcepts(); |
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586 | checkGraphs(); |
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587 | return 0; |
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588 | } |
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