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3 <title>MayaChemTools:Code:Graph::Path.pm</title>
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13 <pre>
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14 <a name="package-Graph::Path-"></a> 1 <span class="k">package </span><span class="i">Graph::Path</span><span class="sc">;</span>
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15 2 <span class="c">#</span>
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16 3 <span class="c"># $RCSfile: Path.pm,v $</span>
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17 4 <span class="c"># $Date: 2015/02/28 20:49:06 $</span>
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18 5 <span class="c"># $Revision: 1.25 $</span>
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19 6 <span class="c">#</span>
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20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span>
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21 8 <span class="c">#</span>
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22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
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23 10 <span class="c">#</span>
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24 11 <span class="c"># This file is part of MayaChemTools.</span>
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25 12 <span class="c">#</span>
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26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
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27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
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28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
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29 16 <span class="c"># later version.</span>
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30 17 <span class="c">#</span>
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31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
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32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
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33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span>
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34 21 <span class="c"># details.</span>
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35 22 <span class="c">#</span>
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36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
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37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span>
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38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
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39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
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40 27 <span class="c">#</span>
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41 28
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42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span>
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43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span>
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44 31 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span>
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45 32 <span class="k">use</span> <span class="w">Storable</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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46 33 <span class="k">use</span> <span class="w">Scalar::Util</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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47 34
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48 35 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS)</span><span class="sc">;</span>
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49 36
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50 37 <span class="i">@ISA</span> = <span class="q">qw(Exporter)</span><span class="sc">;</span>
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51 38 <span class="i">@EXPORT</span> = <span class="q">qw()</span><span class="sc">;</span>
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52 39 <span class="i">@EXPORT_OK</span> = <span class="q">qw()</span><span class="sc">;</span>
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53 40
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54 41 <span class="i">%EXPORT_TAGS</span> = <span class="s">(</span><span class="w">all</span> <span class="cm">=></span> <span class="s">[</span><span class="i">@EXPORT</span><span class="cm">,</span> <span class="i">@EXPORT_OK</span><span class="s">]</span><span class="s">)</span><span class="sc">;</span>
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55 42
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56 43 <span class="c"># Setup class variables...</span>
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57 44 <span class="k">my</span><span class="s">(</span><span class="i">$ClassName</span><span class="cm">,</span> <span class="i">$ObjectID</span><span class="s">)</span><span class="sc">;</span>
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58 45 <span class="i">_InitializeClass</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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59 46
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60 47 <span class="c"># Overload Perl functions...</span>
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61 48 <span class="k">use</span> <span class="w">overload</span> <span class="q">'""'</span> <span class="cm">=></span> <span class="q">'StringifyPath'</span><span class="cm">,</span>
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62 49
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63 50 <span class="q">'=='</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span>
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64 51 <span class="q">'eq'</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span>
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65 52
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66 53 <span class="q">'fallback'</span> <span class="cm">=></span> <span class="k">undef</span><span class="sc">;</span>
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67 54
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68 55 <span class="c"># Class constructor...</span>
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69 <a name="new-"></a> 56 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span>
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70 57 <span class="k">my</span><span class="s">(</span><span class="i">$Class</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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71 58
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72 59 <span class="c"># Initialize object...</span>
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73 60 <span class="k">my</span> <span class="i">$This</span> = <span class="s">{</span><span class="s">}</span><span class="sc">;</span>
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74 61 <span class="k">bless</span> <span class="i">$This</span><span class="cm">,</span> <span class="k">ref</span><span class="s">(</span><span class="i">$Class</span><span class="s">)</span> || <span class="i">$Class</span><span class="sc">;</span>
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75 62 <span class="i">$This</span><span class="i">->_InitializePath</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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76 63
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77 64 <span class="k">if</span> <span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> <span class="i">$This</span><span class="i">->AddVertices</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span> <span class="s">}</span>
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78 65
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79 66 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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80 67 <span class="s">}</span>
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81 68
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82 69 <span class="c"># Initialize object data...</span>
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83 70 <span class="c">#</span>
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84 <a name="_InitializePath-"></a> 71 <span class="k">sub </span><span class="m">_InitializePath</span> <span class="s">{</span>
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85 72 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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86 73
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87 74 <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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88 75 <span class="s">}</span>
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89 76
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90 77 <span class="c"># Initialize class ...</span>
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91 <a name="_InitializeClass-"></a> 78 <span class="k">sub </span><span class="m">_InitializeClass</span> <span class="s">{</span>
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92 79 <span class="c">#Class name...</span>
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93 80 <span class="i">$ClassName</span> = <span class="w">__PACKAGE__</span><span class="sc">;</span>
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94 81 <span class="s">}</span>
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95 82
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96 83 <span class="c"># Add a vertex to path after the end vertex...</span>
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97 84 <span class="c">#</span>
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98 <a name="AddVertex-"></a> 85 <span class="k">sub </span><span class="m">AddVertex</span> <span class="s">{</span>
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99 86 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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100 87
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101 88 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$VertexID</span> <span class="s">)</span> <span class="s">{</span>
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102 89 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span>
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103 90 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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104 91 <span class="s">}</span>
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105 92 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span>
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106 93
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107 94 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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108 95 <span class="s">}</span>
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109 96
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110 97 <span class="c"># Add vertices to the path after the end vertex...</span>
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111 98 <span class="c">#</span>
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112 <a name="AddVertices-"></a> 99 <span class="k">sub </span><span class="m">AddVertices</span> <span class="s">{</span>
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113 100 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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114 101
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115 102 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span>
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116 103 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span>
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117 104 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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118 105 <span class="s">}</span>
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119 106 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span>
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120 107
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121 108 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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122 109 <span class="s">}</span>
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123 110
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124 111 <span class="c"># Add a vertex to path after the end vertex...</span>
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125 112 <span class="c">#</span>
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126 <a name="PushVertex-"></a> 113 <span class="k">sub </span><span class="m">PushVertex</span> <span class="s">{</span>
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127 114 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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128 115
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129 116 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertex</span><span class="s">(</span><span class="i">$VertexID</span><span class="s">)</span><span class="sc">;</span>
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130 117 <span class="s">}</span>
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131 118
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132 119 <span class="c"># Add vertices to the path after the end vertex...</span>
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133 120 <span class="c">#</span>
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134 <a name="PushVertices-"></a> 121 <span class="k">sub </span><span class="m">PushVertices</span> <span class="s">{</span>
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135 122 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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136 123
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137 124 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertices</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span>
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138 125 <span class="s">}</span>
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139 126
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140 127 <span class="c"># Remove end vertex from path...</span>
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141 128 <span class="c">#</span>
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142 <a name="PopVertex-"></a> 129 <span class="k">sub </span><span class="m">PopVertex</span> <span class="s">{</span>
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143 130 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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144 131
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145 132 <span class="k">if</span> <span class="s">(</span>!<span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span> <span class="s">{</span>
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146 133 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->PopVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span>
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147 134 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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148 135 <span class="s">}</span>
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149 136 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
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150 137
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151 138 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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152 139 <span class="s">}</span>
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153 140
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154 141 <span class="c"># Remove start vertex from path...</span>
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155 142 <span class="c">#</span>
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156 <a name="ShiftVertex-"></a> 143 <span class="k">sub </span><span class="m">ShiftVertex</span> <span class="s">{</span>
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157 144 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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158 145
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159 146 <span class="k">if</span> <span class="s">(</span>!<span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span> <span class="s">{</span>
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160 147 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->ShiftVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span>
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161 148 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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162 149 <span class="s">}</span>
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163 150 <span class="k">shift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
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164 151
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165 152 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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166 153 <span class="s">}</span>
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167 154
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168 155 <span class="c"># Add a vertex to path before the start vertex...</span>
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169 156 <span class="c">#</span>
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170 <a name="UnshiftVertex-"></a> 157 <span class="k">sub </span><span class="m">UnshiftVertex</span> <span class="s">{</span>
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171 158 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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172 159
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173 160 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$VertexID</span> <span class="s">)</span> <span class="s">{</span>
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174 161 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span>
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175 162 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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176 163 <span class="s">}</span>
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177 164 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span>
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178 165
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179 166 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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180 167 <span class="s">}</span>
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181 168
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182 169 <span class="c"># Add vertices to the path before the start vertex...</span>
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183 170 <span class="c">#</span>
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184 <a name="UnshiftVertices-"></a> 171 <span class="k">sub </span><span class="m">UnshiftVertices</span> <span class="s">{</span>
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185 172 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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186 173
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187 174 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span>
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188 175 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span>
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189 176 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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190 177 <span class="s">}</span>
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191 178 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span>
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192 179
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193 180 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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194 181 <span class="s">}</span>
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195 182
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196 183 <span class="c"># Get length...</span>
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197 184 <span class="c">#</span>
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198 <a name="GetLength-"></a> 185 <span class="k">sub </span><span class="m">GetLength</span> <span class="s">{</span>
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199 186 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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200 187
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201 188 <span class="k">return</span> <span class="k">scalar</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
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202 189 <span class="s">}</span>
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203 190
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204 191 <span class="c"># Get start vertex...</span>
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205 192 <span class="c">#</span>
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206 <a name="GetStartVertex-"></a> 193 <span class="k">sub </span><span class="m">GetStartVertex</span> <span class="s">{</span>
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207 194 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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208 195
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209 196 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
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210 197 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
|
|
|
211 198 <span class="s">}</span>
|
|
|
212 199 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span> = <span class="n">0</span><span class="sc">;</span>
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|
|
213 200 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span>
|
|
|
214 201 <span class="s">}</span>
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|
|
215 202
|
|
|
216 203 <span class="c"># Get end vertex...</span>
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|
|
217 204 <span class="c">#</span>
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|
218 <a name="GetEndVertex-"></a> 205 <span class="k">sub </span><span class="m">GetEndVertex</span> <span class="s">{</span>
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|
|
219 206 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
220 207
|
|
|
221 208 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
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|
|
222 209 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
|
|
|
223 210 <span class="s">}</span>
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|
224 211 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span>
|
|
|
225 212
|
|
|
226 213 <span class="i">$Index</span> = <span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> - <span class="n">1</span><span class="sc">;</span>
|
|
|
227 214 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span>
|
|
|
228 215 <span class="s">}</span>
|
|
|
229 216
|
|
|
230 217 <span class="c"># Get start and end vertices...</span>
|
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|
231 218 <span class="c">#</span>
|
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|
232 <a name="GetTerminalVertices-"></a> 219 <span class="k">sub </span><span class="m">GetTerminalVertices</span> <span class="s">{</span>
|
|
|
233 220 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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|
|
234 221
|
|
|
235 222 <span class="k">return</span> <span class="s">(</span> <span class="i">$This</span><span class="i">->GetStartVertex</span><span class="s">(</span><span class="s">)</span><span class="cm">,</span> <span class="i">$This</span><span class="i">->GetEndVertex</span><span class="s">(</span><span class="s">)</span> <span class="s">)</span><span class="cm">,</span>
|
|
|
236 223 <span class="s">}</span>
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|
237 224
|
|
|
238 225 <span class="c"># Get path vertices...</span>
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|
239 226 <span class="c">#</span>
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|
240 <a name="GetVertices-"></a> 227 <span class="k">sub </span><span class="m">GetVertices</span> <span class="s">{</span>
|
|
|
241 228 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
242 229
|
|
|
243 230 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} <span class="co">:</span> <span class="k">scalar</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
|
|
|
244 231 <span class="s">}</span>
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|
|
245 232
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|
|
246 233 <span class="c"># Get a specific vertex from path with indicies starting from 0...</span>
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|
|
247 234 <span class="c">#</span>
|
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|
248 <a name="GetVertex-"></a> 235 <span class="k">sub </span><span class="m">GetVertex</span> <span class="s">{</span>
|
|
|
249 236 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Index</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
250 237
|
|
|
251 238 <span class="k">if</span> <span class="s">(</span><span class="i">$Index</span> < <span class="n">0</span><span class="s">)</span> <span class="s">{</span>
|
|
|
252 239 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->GetValue: Index value must be a positive number..."</span><span class="sc">;</span>
|
|
|
253 240 <span class="s">}</span>
|
|
|
254 241 <span class="k">if</span> <span class="s">(</span><span class="i">$Index</span> >= <span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
255 242 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->GetValue: Index vaue must be less than length of path..."</span><span class="sc">;</span>
|
|
|
256 243 <span class="s">}</span>
|
|
|
257 244 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
258 245 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
|
|
|
259 246 <span class="s">}</span>
|
|
|
260 247 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span>
|
|
|
261 248 <span class="s">}</span>
|
|
|
262 249
|
|
|
263 250 <span class="c"># Get a vertex...</span>
|
|
|
264 251 <span class="c">#</span>
|
|
|
265 <a name="_GetVertex-"></a> 252 <span class="k">sub </span><span class="m">_GetVertex</span> <span class="s">{</span>
|
|
|
266 253 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Index</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
267 254
|
|
|
268 255 <span class="k">return</span> <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span>]<span class="sc">;</span>
|
|
|
269 256 <span class="s">}</span>
|
|
|
270 257
|
|
|
271 258 <span class="c"># Get path edges as pair of vertices or number of edges...</span>
|
|
|
272 259 <span class="c">#</span>
|
|
|
273 <a name="GetEdges-"></a> 260 <span class="k">sub </span><span class="m">GetEdges</span> <span class="s">{</span>
|
|
|
274 261 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
275 262
|
|
|
276 263 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span> < <span class="n">1</span><span class="s">)</span> <span class="s">{</span>
|
|
|
277 264 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
|
|
|
278 265 <span class="s">}</span>
|
|
|
279 266 <span class="c"># Set up edges...</span>
|
|
|
280 267 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="cm">,</span> <span class="i">$VertexID1</span><span class="cm">,</span> <span class="i">$VertexID2</span><span class="cm">,</span> <span class="i">@Vertices</span><span class="cm">,</span> <span class="i">@Edges</span><span class="s">)</span><span class="sc">;</span>
|
|
|
281 268
|
|
|
282 269 <span class="i">@Edges</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
283 270 <span class="k">for</span> <span class="i">$Index</span> <span class="s">(</span><span class="n">0</span> .. <span class="s">(</span><span class="i">$#</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} - <span class="n">1</span><span class="s">)</span> <span class="s">)</span> <span class="s">{</span>
|
|
|
284 271 <span class="i">$VertexID1</span> = <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span>]<span class="sc">;</span>
|
|
|
285 272 <span class="i">$VertexID2</span> = <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span> + <span class="n">1</span>]<span class="sc">;</span>
|
|
|
286 273 <span class="k">push</span> <span class="i">@Edges</span><span class="cm">,</span> <span class="s">(</span><span class="i">$VertexID1</span><span class="cm">,</span> <span class="i">$VertexID2</span><span class="s">)</span><span class="sc">;</span>
|
|
|
287 274 <span class="s">}</span>
|
|
|
288 275
|
|
|
289 276 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@Edges</span> <span class="co">:</span> <span class="s">(</span><span class="s">(</span><span class="k">scalar</span> <span class="i">@Edges</span><span class="s">)</span>/<span class="n">2</span><span class="s">)</span><span class="sc">;</span>
|
|
|
290 277 <span class="s">}</span>
|
|
|
291 278
|
|
|
292 279 <span class="c"># Is it a cycle?</span>
|
|
|
293 280 <span class="c">#</span>
|
|
|
294 <a name="IsCycle-"></a> 281 <span class="k">sub </span><span class="m">IsCycle</span> <span class="s">{</span>
|
|
|
295 282 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
296 283 <span class="k">my</span><span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span><span class="sc">;</span>
|
|
|
297 284
|
|
|
298 285 <span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span> = <span class="i">$This</span><span class="i">->GetTerminalVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
299 286
|
|
|
300 287 <span class="k">return</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$EndVertex</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
301 288 <span class="s">}</span>
|
|
|
302 289
|
|
|
303 290 <span class="c"># For a path to be an independent path, it must meet the following conditions:</span>
|
|
|
304 291 <span class="c"># . All other vertices are unique.</span>
|
|
|
305 292 <span class="c">#</span>
|
|
|
306 <a name="IsIndependentPath-"></a> 293 <span class="k">sub </span><span class="m">IsIndependentPath</span> <span class="s">{</span>
|
|
|
307 294 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
308 295
|
|
|
309 296 <span class="c"># Make sure it has at least two vertices...</span>
|
|
|
310 297 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> < <span class="n">2</span><span class="s">)</span> <span class="s">{</span>
|
|
|
311 298 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
312 299 <span class="s">}</span>
|
|
|
313 300
|
|
|
314 301 <span class="c"># Check frequency of occurence for non-terminal vertices...</span>
|
|
|
315 302 <span class="k">my</span><span class="s">(</span><span class="i">$VertexID</span><span class="cm">,</span> <span class="i">$IndependenceStatus</span><span class="cm">,</span> <span class="i">@Vertices</span><span class="cm">,</span> <span class="i">%VerticesMap</span><span class="s">)</span><span class="sc">;</span>
|
|
|
316 303
|
|
|
317 304 <span class="i">@Vertices</span> = <span class="i">$This</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
318 305 <span class="k">shift</span> <span class="i">@Vertices</span><span class="sc">;</span> <span class="k">pop</span> <span class="i">@Vertices</span><span class="sc">;</span>
|
|
|
319 306
|
|
|
320 307 <span class="i">%VerticesMap</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
321 308 <span class="i">$IndependenceStatus</span> = <span class="n">1</span><span class="sc">;</span>
|
|
|
322 309
|
|
|
323 310 <span class="j">VERTEXID:</span> <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">@Vertices</span><span class="s">)</span> <span class="s">{</span>
|
|
|
324 311 <span class="k">if</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$VerticesMap</span>{<span class="i">$VertexID</span>} <span class="s">)</span> <span class="s">{</span>
|
|
|
325 312 <span class="i">$IndependenceStatus</span> = <span class="n">0</span><span class="sc">;</span>
|
|
|
326 313 <span class="k">last</span> <span class="j">VERTEXID</span><span class="sc">;</span>
|
|
|
327 314 <span class="s">}</span>
|
|
|
328 315 <span class="i">$VerticesMap</span>{<span class="i">$VertexID</span>} = <span class="i">$VertexID</span><span class="sc">;</span>
|
|
|
329 316 <span class="s">}</span>
|
|
|
330 317 <span class="k">return</span> <span class="i">$IndependenceStatus</span><span class="sc">;</span>
|
|
|
331 318 <span class="s">}</span>
|
|
|
332 319
|
|
|
333 320 <span class="c"># For a path to be an independent cyclic path, it must meet the following conditions:</span>
|
|
|
334 321 <span class="c"># . Termimal vertices are the same</span>
|
|
|
335 322 <span class="c"># . All other vertices are unique.</span>
|
|
|
336 323 <span class="c">#</span>
|
|
|
337 <a name="IsIndependentCyclicPath-"></a> 324 <span class="k">sub </span><span class="m">IsIndependentCyclicPath</span> <span class="s">{</span>
|
|
|
338 325 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
339 326
|
|
|
340 327 <span class="c"># Make sure it's a cycle...</span>
|
|
|
341 328 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> >= <span class="n">3</span> && <span class="i">$This</span><span class="i">->IsCycle</span><span class="s">(</span><span class="s">)</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
342 329 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
343 330 <span class="s">}</span>
|
|
|
344 331 <span class="k">return</span> <span class="i">$This</span><span class="i">->IsIndependentPath</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
345 332 <span class="s">}</span>
|
|
|
346 333
|
|
|
347 334 <span class="c"># Is it a path object?</span>
|
|
|
348 <a name="IsPath-"></a> 335 <span class="k">sub </span><span class="m">IsPath ($)</span> <span class="s">{</span>
|
|
|
349 336 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
350 337
|
|
|
351 338 <span class="k">return</span> <span class="i">_IsPath</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span><span class="sc">;</span>
|
|
|
352 339 <span class="s">}</span>
|
|
|
353 340
|
|
|
354 341 <span class="c"># Copy path...</span>
|
|
|
355 342 <span class="c">#</span>
|
|
|
356 <a name="Copy-"></a> 343 <span class="k">sub </span><span class="m">Copy</span> <span class="s">{</span>
|
|
|
357 344 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
358 345 <span class="k">my</span><span class="s">(</span><span class="i">$NewPath</span><span class="s">)</span><span class="sc">;</span>
|
|
|
359 346
|
|
|
360 347 <span class="i">$NewPath</span> = <span class="i">Storable::dclone</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span><span class="sc">;</span>
|
|
|
361 348
|
|
|
362 349 <span class="k">return</span> <span class="i">$NewPath</span><span class="sc">;</span>
|
|
|
363 350 <span class="s">}</span>
|
|
|
364 351
|
|
|
365 352 <span class="c"># Reverse order of vertices in path...</span>
|
|
|
366 353 <span class="c">#</span>
|
|
|
367 <a name="Reverse-"></a> 354 <span class="k">sub </span><span class="m">Reverse</span> <span class="s">{</span>
|
|
|
368 355 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
369 356 <span class="k">my</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span>
|
|
|
370 357
|
|
|
371 358 <span class="i">@VertexIDs</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> <span class="k">push</span> <span class="i">@VertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
|
|
|
372 359
|
|
|
373 360 <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@VertexIDs</span><span class="sc">;</span>
|
|
|
374 361
|
|
|
375 362 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
|
|
|
376 363 <span class="s">}</span>
|
|
|
377 364
|
|
|
378 365 <span class="c"># Get vertices common between two paths...</span>
|
|
|
379 366 <span class="c">#</span>
|
|
|
380 <a name="GetCommonVertices-"></a> 367 <span class="k">sub </span><span class="m">GetCommonVertices</span> <span class="s">{</span>
|
|
|
381 368 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
382 369 <span class="k">my</span><span class="s">(</span><span class="i">$VertexID</span><span class="cm">,</span> <span class="i">@CommonVertices</span><span class="cm">,</span> <span class="i">%OtherVerticesMap</span><span class="s">)</span><span class="sc">;</span>
|
|
|
383 370
|
|
|
384 371 <span class="c"># Setup a vertices hash for a quick look up...</span>
|
|
|
385 372 <span class="i">%OtherVerticesMap</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
386 373 <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">$Other</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
387 374 <span class="i">$OtherVerticesMap</span>{<span class="i">$VertexID</span>} = <span class="i">$VertexID</span><span class="sc">;</span>
|
|
|
388 375 <span class="s">}</span>
|
|
|
389 376
|
|
|
390 377 <span class="i">@CommonVertices</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
391 378 <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
392 379 <span class="k">if</span> <span class="s">(</span><span class="i">$OtherVerticesMap</span>{<span class="i">$VertexID</span>}<span class="s">)</span> <span class="s">{</span>
|
|
|
393 380 <span class="k">push</span> <span class="i">@CommonVertices</span><span class="cm">,</span> <span class="i">$VertexID</span>
|
|
|
394 381 <span class="s">}</span>
|
|
|
395 382 <span class="s">}</span>
|
|
|
396 383 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@CommonVertices</span> <span class="co">:</span> <span class="k">scalar</span> <span class="i">@CommonVertices</span><span class="sc">;</span>
|
|
|
397 384 <span class="s">}</span>
|
|
|
398 385
|
|
|
399 386 <span class="c"># Join the existing path with a new path specifed using a path object of a list of</span>
|
|
|
400 387 <span class="c"># verticies.</span>
|
|
|
401 388 <span class="c">#</span>
|
|
|
402 <a name="Join-"></a> 389 <span class="k">sub </span><span class="m">Join</span> <span class="s">{</span>
|
|
|
403 390 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@Values</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
404 391
|
|
|
405 392 <span class="k">return</span> <span class="i">$This</span><span class="i">->_Join</span><span class="s">(</span><span class="i">@Values</span><span class="s">)</span><span class="sc">;</span>
|
|
|
406 393 <span class="s">}</span>
|
|
|
407 394
|
|
|
408 395 <span class="c"># Join the existing path with a new path specifed using a path object at a specified</span>
|
|
|
409 396 <span class="c"># vertex.</span>
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|
|
410 397 <span class="c">#</span>
|
|
|
411 <a name="JoinAtVertex-"></a> 398 <span class="k">sub </span><span class="m">JoinAtVertex</span> <span class="s">{</span>
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|
|
412 399 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="cm">,</span> <span class="i">$CenterVertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
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413 400
|
|
|
414 401 <span class="c"># Make sure CenterVertexID is end vertex in This and start vertex in Other before</span>
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|
415 402 <span class="c"># joining them...</span>
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|
416 403 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetEndVertex</span><span class="s">(</span><span class="s">)</span> != <span class="i">$CenterVertexID</span><span class="s">)</span> <span class="s">{</span>
|
|
|
417 404 <span class="i">$This</span><span class="i">->Reverse</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
418 405 <span class="s">}</span>
|
|
|
419 406 <span class="k">if</span> <span class="s">(</span><span class="i">$Other</span><span class="i">->GetStartVertex</span><span class="s">(</span><span class="s">)</span> != <span class="i">$CenterVertexID</span><span class="s">)</span> <span class="s">{</span>
|
|
|
420 407 <span class="i">$Other</span><span class="i">->Reverse</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
421 408 <span class="s">}</span>
|
|
|
422 409 <span class="k">return</span> <span class="i">$This</span><span class="i">->_Join</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span><span class="sc">;</span>
|
|
|
423 410 <span class="s">}</span>
|
|
|
424 411
|
|
|
425 412 <span class="c"># Join the existing path with a new path specifed using a path object of a list of</span>
|
|
|
426 413 <span class="c"># verticies.</span>
|
|
|
427 414 <span class="c">#</span>
|
|
|
428 415 <span class="c"># Notes:</span>
|
|
|
429 416 <span class="c"># . Paths must have a common terminal vertex.</span>
|
|
|
430 417 <span class="c"># . Based on the common terminal vertex found, new path vertices are added to the</span>
|
|
|
431 418 <span class="c"># current path in one of the four ways:</span>
|
|
|
432 419 <span class="c"># . New path at end of current path with same vertices order : EndVertex = NewStartVertex</span>
|
|
|
433 420 <span class="c"># . New path at end of current path with reversed vertices order: EndVertex = NewEndVertex</span>
|
|
|
434 421 <span class="c"># . New path at front of current path with same vertices order: StartVertex = NewEndVertex</span>
|
|
|
435 422 <span class="c"># . New path at front of current path with reversed vertices order: StartVertex = NewStartVertex</span>
|
|
|
436 423 <span class="c">#</span>
|
|
|
437 <a name="_Join-"></a> 424 <span class="k">sub </span><span class="m">_Join</span> <span class="s">{</span>
|
|
|
438 425 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@Values</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
439 426
|
|
|
440 427 <span class="k">if</span> <span class="s">(</span>!<span class="i">@Values</span><span class="s">)</span> <span class="s">{</span>
|
|
|
441 428 <span class="k">return</span><span class="sc">;</span>
|
|
|
442 429 <span class="s">}</span>
|
|
|
443 430
|
|
|
444 431 <span class="c"># Get a list of new vertex IDs..</span>
|
|
|
445 432 <span class="k">my</span><span class="s">(</span><span class="i">$NewPath</span><span class="cm">,</span> <span class="i">$FirstValue</span><span class="cm">,</span> <span class="i">$TypeOfFirstValue</span><span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="s">)</span><span class="sc">;</span>
|
|
|
446 433
|
|
|
447 434 <span class="i">$NewPath</span> = <span class="i">$This</span><span class="i">->Copy</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
448 435
|
|
|
449 436 <span class="i">@NewVertexIDs</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
450 437 <span class="i">$FirstValue</span> = <span class="i">$Values</span>[<span class="n">0</span>]<span class="sc">;</span>
|
|
|
451 438 <span class="i">$TypeOfFirstValue</span> = <span class="k">ref</span> <span class="i">$FirstValue</span><span class="sc">;</span>
|
|
|
452 439 <span class="k">if</span> <span class="s">(</span><span class="i">$TypeOfFirstValue</span> =~ <span class="q">/^(SCALAR|HASH|CODE|REF|GLOB)/</span><span class="s">)</span> <span class="s">{</span>
|
|
|
453 440 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->JoinPath: Trying to add vertices to path object with a reference to unsupported value format..."</span><span class="sc">;</span>
|
|
|
454 441 <span class="s">}</span>
|
|
|
455 442
|
|
|
456 443 <span class="k">if</span> <span class="s">(</span><span class="i">_IsPath</span><span class="s">(</span><span class="i">$FirstValue</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
457 444 <span class="c"># It's another path object...</span>
|
|
|
458 445 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$FirstValue</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
|
|
|
459 446 <span class="s">}</span>
|
|
|
460 447 <span class="k">elsif</span> <span class="s">(</span><span class="i">$TypeOfFirstValue</span> =~ <span class="q">/^ARRAY/</span><span class="s">)</span> <span class="s">{</span>
|
|
|
461 448 <span class="c"># It's array reference...</span>
|
|
|
462 449 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$FirstValue</span>}<span class="sc">;</span>
|
|
|
463 450 <span class="s">}</span>
|
|
|
464 451 <span class="k">else</span> <span class="s">{</span>
|
|
|
465 452 <span class="c"># It's a list of values...</span>
|
|
|
466 453 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@Values</span><span class="sc">;</span>
|
|
|
467 454 <span class="s">}</span>
|
|
|
468 455 <span class="k">my</span><span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="cm">,</span> <span class="i">$NewStartVertex</span><span class="cm">,</span> <span class="i">$NewEndVertex</span><span class="s">)</span><span class="sc">;</span>
|
|
|
469 456
|
|
|
470 457 <span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span> = <span class="i">$NewPath</span><span class="i">->GetTerminalVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
|
|
|
471 458 <span class="s">(</span><span class="i">$NewStartVertex</span><span class="cm">,</span> <span class="i">$NewEndVertex</span><span class="s">)</span> = <span class="s">(</span><span class="i">$NewVertexIDs</span>[<span class="n">0</span>]<span class="cm">,</span> <span class="i">$NewVertexIDs</span>[<span class="i">$#NewVertexIDs</span>]<span class="s">)</span><span class="sc">;</span>
|
|
|
472 459
|
|
|
473 460 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewStartVertex</span> || <span class="i">$EndVertex</span> == <span class="i">$NewEndVertex</span> || <span class="i">$StartVertex</span> == <span class="i">$NewEndVertex</span> || <span class="i">$StartVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
474 461 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->JoinPath: Paths can't be joined: No common terminal vertex found..."</span><span class="sc">;</span>
|
|
|
475 462 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
|
|
|
476 463 <span class="s">}</span>
|
|
|
477 464
|
|
|
478 465 <span class="k">if</span> <span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span> <span class="s">{</span>
|
|
|
479 466 <span class="c"># Take out EndVertex and add new path at the end...</span>
|
|
|
480 467 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
|
|
|
481 468 <span class="k">push</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
482 469 <span class="s">}</span>
|
|
|
483 470 <span class="k">elsif</span> <span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewEndVertex</span><span class="s">)</span> <span class="s">{</span>
|
|
|
484 471 <span class="c"># Take out EndVertex and add new path at the end with reversed vertex order...</span>
|
|
|
485 472 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span>
|
|
|
486 473 <span class="k">push</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
487 474 <span class="s">}</span>
|
|
|
488 475 <span class="k">elsif</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$NewEndVertex</span><span class="s">)</span> <span class="s">{</span>
|
|
|
489 476 <span class="c"># Take out NewEndVertex and add new path at the front...</span>
|
|
|
490 477 <span class="k">pop</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
491 478 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
492 479 <span class="s">}</span>
|
|
|
493 480 <span class="k">elsif</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span> <span class="s">{</span>
|
|
|
494 481 <span class="c"># Take out NewStartVertex and add new path at the front...</span>
|
|
|
495 482 <span class="k">shift</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
496 483 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span>
|
|
|
497 484 <span class="s">}</span>
|
|
|
498 485
|
|
|
499 486 <span class="k">return</span> <span class="i">$NewPath</span><span class="cm">,</span>
|
|
|
500 487 <span class="s">}</span>
|
|
|
501 488
|
|
|
502 489 <span class="c"># Compare two paths...</span>
|
|
|
503 490 <span class="c">#</span>
|
|
|
504 <a name="_PathEqualOperator-"></a> 491 <span class="k">sub </span><span class="m">_PathEqualOperator</span> <span class="s">{</span>
|
|
|
505 492 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
506 493
|
|
|
507 494 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> && <span class="i">_IsPath</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> && <span class="k">defined</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span> && <span class="i">_IsPath</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
508 495 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->_PathEqualOperator: Path equal comparison failed: Both object must be paths..."</span><span class="sc">;</span>
|
|
|
509 496 <span class="s">}</span>
|
|
|
510 497
|
|
|
511 498 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> != <span class="i">$Other</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
|
|
|
512 499 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
513 500 <span class="s">}</span>
|
|
|
514 501 <span class="k">my</span><span class="s">(</span><span class="i">$ThisID</span><span class="cm">,</span> <span class="i">$OtherID</span><span class="cm">,</span> <span class="i">$ReverseOtherID</span><span class="s">)</span><span class="sc">;</span>
|
|
|
515 502
|
|
|
516 503 <span class="i">$ThisID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span>
|
|
|
517 504 <span class="i">$OtherID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$Other</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span>
|
|
|
518 505 <span class="i">$ReverseOtherID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="k">reverse</span><span class="s">(</span><span class="i">@</span>{<span class="i">$Other</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="s">)</span><span class="sc">;</span>
|
|
|
519 506
|
|
|
520 507 <span class="k">return</span> <span class="s">(</span><span class="i">$ThisID</span> =~ <span class="q">/^($OtherID|$ReverseOtherID)$/</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
521 508 <span class="s">}</span>
|
|
|
522 509
|
|
|
523 510 <span class="c"># Return a string containing vertices in the path...</span>
|
|
|
524 <a name="StringifyPath-"></a> 511 <span class="k">sub </span><span class="m">StringifyPath</span> <span class="s">{</span>
|
|
|
525 512 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
526 513 <span class="k">my</span><span class="s">(</span><span class="i">$PathString</span><span class="s">)</span><span class="sc">;</span>
|
|
|
527 514
|
|
|
528 515 <span class="i">$PathString</span> = <span class="q">"Path: "</span> . <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span>
|
|
|
529 516
|
|
|
530 517 <span class="k">return</span> <span class="i">$PathString</span><span class="sc">;</span>
|
|
|
531 518 <span class="s">}</span>
|
|
|
532 519
|
|
|
533 520 <span class="c"># Is it a path object?</span>
|
|
|
534 <a name="_IsPath-"></a> 521 <span class="k">sub </span><span class="m">_IsPath</span> <span class="s">{</span>
|
|
|
535 522 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
|
|
|
536 523
|
|
|
537 524 <span class="k">return</span> <span class="s">(</span><span class="i">Scalar::Util::blessed</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> && <span class="i">$Object</span><span class="i">->isa</span><span class="s">(</span><span class="i">$ClassName</span><span class="s">)</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
|
|
|
538 525 <span class="s">}</span>
|
|
|
539 526
|
|
|
540 <a name="EOF-"></a></pre>
|
|
|
541 <p> </p>
|
|
|
542 <br />
|
|
|
543 <center>
|
|
|
544 <img src="../../../images/h2o2.png">
|
|
|
545 </center>
|
|
|
546 </body>
|
|
|
547 </html>
|
