Mercurial > repos > deepakjadmin > mayatool3_test3
comparison mayachemtools/docs/modules/html/code/Path.html @ 0:73ae111cf86f draft
Uploaded
author | deepakjadmin |
---|---|
date | Wed, 20 Jan 2016 11:55:01 -0500 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:73ae111cf86f |
---|---|
1 <html> | |
2 <head> | |
3 <title>MayaChemTools:Code:Graph::Path.pm</title> | |
4 <meta http-equiv="content-type" content="text/html;charset=utf-8"> | |
5 <link rel="stylesheet" type="text/css" href="../../../css/MayaChemToolsCode.css"> | |
6 </head> | |
7 <body leftmargin="20" rightmargin="20" topmargin="10" bottommargin="10"> | |
8 <br/> | |
9 <center> | |
10 <a href="http://www.mayachemtools.org" title="MayaChemTools Home"><img src="../../../images/MayaChemToolsLogo.gif" border="0" alt="MayaChemTools"></a> | |
11 </center> | |
12 <br/> | |
13 <pre> | |
14 <a name="package-Graph::Path-"></a> 1 <span class="k">package </span><span class="i">Graph::Path</span><span class="sc">;</span> | |
15 2 <span class="c">#</span> | |
16 3 <span class="c"># $RCSfile: Path.pm,v $</span> | |
17 4 <span class="c"># $Date: 2015/02/28 20:49:06 $</span> | |
18 5 <span class="c"># $Revision: 1.25 $</span> | |
19 6 <span class="c">#</span> | |
20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span> | |
21 8 <span class="c">#</span> | |
22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span> | |
23 10 <span class="c">#</span> | |
24 11 <span class="c"># This file is part of MayaChemTools.</span> | |
25 12 <span class="c">#</span> | |
26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span> | |
27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span> | |
28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span> | |
29 16 <span class="c"># later version.</span> | |
30 17 <span class="c">#</span> | |
31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span> | |
32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span> | |
33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span> | |
34 21 <span class="c"># details.</span> | |
35 22 <span class="c">#</span> | |
36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span> | |
37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span> | |
38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span> | |
39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span> | |
40 27 <span class="c">#</span> | |
41 28 | |
42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span> | |
43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span> | |
44 31 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span> | |
45 32 <span class="k">use</span> <span class="w">Storable</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
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> | |
47 34 | |
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> | |
49 36 | |
50 37 <span class="i">@ISA</span> = <span class="q">qw(Exporter)</span><span class="sc">;</span> | |
51 38 <span class="i">@EXPORT</span> = <span class="q">qw()</span><span class="sc">;</span> | |
52 39 <span class="i">@EXPORT_OK</span> = <span class="q">qw()</span><span class="sc">;</span> | |
53 40 | |
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> | |
55 42 | |
56 43 <span class="c"># Setup class variables...</span> | |
57 44 <span class="k">my</span><span class="s">(</span><span class="i">$ClassName</span><span class="cm">,</span> <span class="i">$ObjectID</span><span class="s">)</span><span class="sc">;</span> | |
58 45 <span class="i">_InitializeClass</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
59 46 | |
60 47 <span class="c"># Overload Perl functions...</span> | |
61 48 <span class="k">use</span> <span class="w">overload</span> <span class="q">'""'</span> <span class="cm">=></span> <span class="q">'StringifyPath'</span><span class="cm">,</span> | |
62 49 | |
63 50 <span class="q">'=='</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span> | |
64 51 <span class="q">'eq'</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span> | |
65 52 | |
66 53 <span class="q">'fallback'</span> <span class="cm">=></span> <span class="k">undef</span><span class="sc">;</span> | |
67 54 | |
68 55 <span class="c"># Class constructor...</span> | |
69 <a name="new-"></a> 56 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span> | |
70 57 <span class="k">my</span><span class="s">(</span><span class="i">$Class</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
71 58 | |
72 59 <span class="c"># Initialize object...</span> | |
73 60 <span class="k">my</span> <span class="i">$This</span> = <span class="s">{</span><span class="s">}</span><span class="sc">;</span> | |
74 61 <span class="k">bless</span> <span class="i">$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> | |
75 62 <span class="i">$This</span><span class="i">->_InitializePath</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
76 63 | |
77 64 <span class="k">if</span> <span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> <span class="i">$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> | |
78 65 | |
79 66 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
80 67 <span class="s">}</span> | |
81 68 | |
82 69 <span class="c"># Initialize object data...</span> | |
83 70 <span class="c">#</span> | |
84 <a name="_InitializePath-"></a> 71 <span class="k">sub </span><span class="m">_InitializePath</span> <span class="s">{</span> | |
85 72 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
86 73 | |
87 74 <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
88 75 <span class="s">}</span> | |
89 76 | |
90 77 <span class="c"># Initialize class ...</span> | |
91 <a name="_InitializeClass-"></a> 78 <span class="k">sub </span><span class="m">_InitializeClass</span> <span class="s">{</span> | |
92 79 <span class="c">#Class name...</span> | |
93 80 <span class="i">$ClassName</span> = <span class="w">__PACKAGE__</span><span class="sc">;</span> | |
94 81 <span class="s">}</span> | |
95 82 | |
96 83 <span class="c"># Add a vertex to path after the end vertex...</span> | |
97 84 <span class="c">#</span> | |
98 <a name="AddVertex-"></a> 85 <span class="k">sub </span><span class="m">AddVertex</span> <span class="s">{</span> | |
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> | |
100 87 | |
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> | |
102 89 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span> | |
103 90 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
104 91 <span class="s">}</span> | |
105 92 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span> | |
106 93 | |
107 94 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
108 95 <span class="s">}</span> | |
109 96 | |
110 97 <span class="c"># Add vertices to the path after the end vertex...</span> | |
111 98 <span class="c">#</span> | |
112 <a name="AddVertices-"></a> 99 <span class="k">sub </span><span class="m">AddVertices</span> <span class="s">{</span> | |
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> | |
114 101 | |
115 102 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> | |
116 103 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span> | |
117 104 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
118 105 <span class="s">}</span> | |
119 106 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span> | |
120 107 | |
121 108 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
122 109 <span class="s">}</span> | |
123 110 | |
124 111 <span class="c"># Add a vertex to path after the end vertex...</span> | |
125 112 <span class="c">#</span> | |
126 <a name="PushVertex-"></a> 113 <span class="k">sub </span><span class="m">PushVertex</span> <span class="s">{</span> | |
127 114 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
128 115 | |
129 116 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertex</span><span class="s">(</span><span class="i">$VertexID</span><span class="s">)</span><span class="sc">;</span> | |
130 117 <span class="s">}</span> | |
131 118 | |
132 119 <span class="c"># Add vertices to the path after the end vertex...</span> | |
133 120 <span class="c">#</span> | |
134 <a name="PushVertices-"></a> 121 <span class="k">sub </span><span class="m">PushVertices</span> <span class="s">{</span> | |
135 122 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
136 123 | |
137 124 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertices</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span> | |
138 125 <span class="s">}</span> | |
139 126 | |
140 127 <span class="c"># Remove end vertex from path...</span> | |
141 128 <span class="c">#</span> | |
142 <a name="PopVertex-"></a> 129 <span class="k">sub </span><span class="m">PopVertex</span> <span class="s">{</span> | |
143 130 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
144 131 | |
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> | |
146 133 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->PopVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span> | |
147 134 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
148 135 <span class="s">}</span> | |
149 136 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
150 137 | |
151 138 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
152 139 <span class="s">}</span> | |
153 140 | |
154 141 <span class="c"># Remove start vertex from path...</span> | |
155 142 <span class="c">#</span> | |
156 <a name="ShiftVertex-"></a> 143 <span class="k">sub </span><span class="m">ShiftVertex</span> <span class="s">{</span> | |
157 144 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
158 145 | |
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> | |
160 147 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->ShiftVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span> | |
161 148 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
162 149 <span class="s">}</span> | |
163 150 <span class="k">shift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
164 151 | |
165 152 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
166 153 <span class="s">}</span> | |
167 154 | |
168 155 <span class="c"># Add a vertex to path before the start vertex...</span> | |
169 156 <span class="c">#</span> | |
170 <a name="UnshiftVertex-"></a> 157 <span class="k">sub </span><span class="m">UnshiftVertex</span> <span class="s">{</span> | |
171 158 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
172 159 | |
173 160 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$VertexID</span> <span class="s">)</span> <span class="s">{</span> | |
174 161 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span> | |
175 162 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
176 163 <span class="s">}</span> | |
177 164 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span> | |
178 165 | |
179 166 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
180 167 <span class="s">}</span> | |
181 168 | |
182 169 <span class="c"># Add vertices to the path before the start vertex...</span> | |
183 170 <span class="c">#</span> | |
184 <a name="UnshiftVertices-"></a> 171 <span class="k">sub </span><span class="m">UnshiftVertices</span> <span class="s">{</span> | |
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> | |
186 173 | |
187 174 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> | |
188 175 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span> | |
189 176 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
190 177 <span class="s">}</span> | |
191 178 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span> | |
192 179 | |
193 180 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
194 181 <span class="s">}</span> | |
195 182 | |
196 183 <span class="c"># Get length...</span> | |
197 184 <span class="c">#</span> | |
198 <a name="GetLength-"></a> 185 <span class="k">sub </span><span class="m">GetLength</span> <span class="s">{</span> | |
199 186 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
200 187 | |
201 188 <span class="k">return</span> <span class="k">scalar</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
202 189 <span class="s">}</span> | |
203 190 | |
204 191 <span class="c"># Get start vertex...</span> | |
205 192 <span class="c">#</span> | |
206 <a name="GetStartVertex-"></a> 193 <span class="k">sub </span><span class="m">GetStartVertex</span> <span class="s">{</span> | |
207 194 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
208 195 | |
209 196 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
210 197 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
211 198 <span class="s">}</span> | |
212 199 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span> = <span class="n">0</span><span class="sc">;</span> | |
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> | |
215 202 | |
216 203 <span class="c"># Get end vertex...</span> | |
217 204 <span class="c">#</span> | |
218 <a name="GetEndVertex-"></a> 205 <span class="k">sub </span><span class="m">GetEndVertex</span> <span class="s">{</span> | |
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> | |
222 209 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
223 210 <span class="s">}</span> | |
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">$Index</span><span class="s">)</span><span class="sc">;</span> | |
228 215 <span class="s">}</span> | |
229 216 | |
230 217 <span class="c"># Get start and end vertices...</span> | |
231 218 <span class="c">#</span> | |
232 <a name="GetTerminalVertices-"></a> 219 <span class="k">sub </span><span class="m">GetTerminalVertices</span> <span class="s">{</span> | |
233 220 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
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> | |
237 224 | |
238 225 <span class="c"># Get path vertices...</span> | |
239 226 <span class="c">#</span> | |
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">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
244 231 <span class="s">}</span> | |
245 232 | |
246 233 <span class="c"># Get a specific vertex from path with indicies starting from 0...</span> | |
247 234 <span class="c">#</span> | |
248 <a name="GetVertex-"></a> 235 <span class="k">sub </span><span class="m">GetVertex</span> <span class="s">{</span> | |
249 236 <span class="k">my</span><span class="s">(</span><span class="i">$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> | |
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> | |
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">$CenterVertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
413 400 | |
414 401 <span class="c"># Make sure CenterVertexID is end vertex in This and start vertex in Other before</span> | |
415 402 <span class="c"># joining them...</span> | |
416 403 <span class="k">if</span> <span class="s">(</span><span class="i">$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> |