272 lines
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<li><a href="../cpp_algorithms/annotated.html">Algorithms</a></li>
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<li><a href="../cpp_sat/annotated.html">CP-SAT</a></li>
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<h1 style="color: #145A32;">C++ Reference: Graph</h1>
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<a href="io_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2010-2021 Google LLC</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// you may not use this file except in compliance with the License.</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// You may obtain a copy of the License at</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment">// See the License for the specific language governing permissions and</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// limitations under the License.</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment">// A collections of i/o utilities for the Graph classes in ./graph.h.</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#ifndef UTIL_GRAPH_IO_H_</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#define UTIL_GRAPH_IO_H_</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include <algorithm></span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include <memory></span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include <numeric></span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include <string></span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include <vector></span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include "absl/status/status.h"</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include "absl/status/statusor.h"</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include "absl/strings/numbers.h"</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="preprocessor">#include "absl/strings/str_format.h"</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="preprocessor">#include "absl/strings/str_join.h"</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="preprocessor">#include "absl/strings/str_split.h"</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#include "ortools/base/filelineiter.h"</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#include "<a class="code" href="graph_8h.html">ortools/graph/graph.h</a>"</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceutil.html">util</a> {</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment">// Returns a string representation of a graph.</span></div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9"> 38</a></span><span class="keyword">enum</span> <a class="code hl_enumeration" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9">GraphToStringFormat</a> {</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// One arc per line, eg. "3->1".</span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"><a class="line" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9a59afa9bae775818b44690c5d14cdf8d0"> 40</a></span> <a class="code hl_enumvalue" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9a59afa9bae775818b44690c5d14cdf8d0">PRINT_GRAPH_ARCS</a>,</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// One space-separated adjacency list per line, eg. "3: 5 1 3 1".</span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// Nodes with no outgoing arc get an empty list.</span></div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ac932364714f74e3ca75990c8126019a1"> 44</a></span> <a class="code hl_enumvalue" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ac932364714f74e3ca75990c8126019a1">PRINT_GRAPH_ADJACENCY_LISTS</a>,</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// Ditto, but the adjacency lists are sorted.</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ada36744a3f529ceb03e7c1faa842854d"> 47</a></span> <a class="code hl_enumvalue" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ada36744a3f529ceb03e7c1faa842854d">PRINT_GRAPH_ADJACENCY_LISTS_SORTED</a>,</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>};</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">template</span> <<span class="keyword">class</span> Graph></div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span>std::string <a class="code hl_function" href="namespaceutil.html#a372b5c94ec5d30f923449516ebc2a963">GraphToString</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>& graph, <a class="code hl_enumeration" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9">GraphToStringFormat</a> format);</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="comment">// Writes a graph to the ".g" file format described above. If "directed" is</span></div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="comment">// true, all arcs are written to the file. If it is false, the graph is expected</span></div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="comment">// to be undirected (i.e. the number of arcs a->b is equal to the number of arcs</span></div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="comment">// b->a for all nodes a,b); and only the arcs a->b where a<=b are written. Note</span></div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="comment">// however that in this case, the symmetry of the graph is not fully checked</span></div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="comment">// (only the parity of the number of non-self arcs is).</span></div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="comment">//</span></div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="comment">// "num_nodes_with_color" is optional. If it is not empty, then the color</span></div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="comment">// information will be written to the header of the .g file. See ReadGraphFile.</span></div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="comment">//</span></div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span><span class="comment">// This method is the reverse of ReadGraphFile (with the same value for</span></div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="comment">// "directed").</span></div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="keyword">template</span> <<span class="keyword">class</span> Graph></div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span>absl::Status <a class="code hl_function" href="namespaceutil.html#a45fca0c4762006176ad5622ec40dea9c">WriteGraphToFile</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">Graph</a>& graph, <span class="keyword">const</span> std::string& filename,</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordtype">bool</span> directed,</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">const</span> std::vector<int>& num_nodes_with_color);</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="comment">// Implementations of the templated methods.</span></div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> </div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span><span class="keyword">template</span> <<span class="keyword">class</span> Graph></div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"><a class="line" href="namespaceutil.html#a372b5c94ec5d30f923449516ebc2a963"> 72</a></span>std::string <a class="code hl_function" href="namespaceutil.html#a372b5c94ec5d30f923449516ebc2a963">GraphToString</a>(<span class="keyword">const</span> <a class="code hl_class" href="classutil_1_1_list_graph.html">Graph</a>& graph, <a class="code hl_enumeration" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9">GraphToStringFormat</a> format) {</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> std::string out;</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> std::vector<typename Graph::NodeIndex> adj;</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#aec05ff3d270a5f888e1623c2a99ff2aa">Graph::NodeIndex</a> node : graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a8a40f2c75615a26ba71e94dd7d42f481">AllNodes</a>()) {</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">if</span> (format == <a class="code hl_enumvalue" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9a59afa9bae775818b44690c5d14cdf8d0">PRINT_GRAPH_ARCS</a>) {</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#a92531459eff09455cfa63976f5024906">Graph::ArcIndex</a> arc : graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aeacdf885cd6777318b5aa4ef864e1066">OutgoingArcs</a>(node)) {</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">if</span> (!out.empty()) out += <span class="charliteral">'\n'</span>;</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> absl::StrAppend(&out, node, <span class="stringliteral">"->"</span>, graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aceb0938bcb2e8e5f37986d4cf8e3a955">Head</a>(arc));</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> }</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> } <span class="keywordflow">else</span> { <span class="comment">// PRINT_GRAPH_ADJACENCY_LISTS[_SORTED]</span></div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> adj.clear();</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#a92531459eff09455cfa63976f5024906">Graph::ArcIndex</a> arc : graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aeacdf885cd6777318b5aa4ef864e1066">OutgoingArcs</a>(node)) {</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> adj.push_back(graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aceb0938bcb2e8e5f37986d4cf8e3a955">Head</a>(arc));</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordflow">if</span> (format == <a class="code hl_enumvalue" href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ada36744a3f529ceb03e7c1faa842854d">PRINT_GRAPH_ADJACENCY_LISTS_SORTED</a>) {</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> std::sort(adj.begin(), adj.end());</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keywordflow">if</span> (node != 0) out += <span class="charliteral">'\n'</span>;</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> absl::StrAppend(&out, node, <span class="stringliteral">": "</span>, absl::StrJoin(adj, <span class="stringliteral">" "</span>));</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> }</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> }</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keywordflow">return</span> out;</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span>}</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span><span class="keyword">template</span> <<span class="keyword">class</span> Graph></div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"><a class="line" href="namespaceutil.html#a45fca0c4762006176ad5622ec40dea9c"> 97</a></span>absl::Status <a class="code hl_function" href="namespaceutil.html#a45fca0c4762006176ad5622ec40dea9c">WriteGraphToFile</a>(<span class="keyword">const</span> <a class="code hl_class" href="classutil_1_1_list_graph.html">Graph</a>& graph, <span class="keyword">const</span> std::string& filename,</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="keywordtype">bool</span> directed,</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="keyword">const</span> std::vector<int>& num_nodes_with_color) {</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> FILE* f = fopen(filename.c_str(), <span class="stringliteral">"w"</span>);</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keywordflow">if</span> (f == <span class="keyword">nullptr</span>) {</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordflow">return</span> absl::Status(absl::StatusCode::kInvalidArgument,</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="stringliteral">"Could not open file: '"</span> + filename + <span class="stringliteral">"'"</span>);</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> }</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="comment">// In undirected mode, we must count the self-arcs separately. All other arcs</span></div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="comment">// should be duplicated.</span></div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordtype">int</span> num_self_arcs = 0;</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keywordflow">if</span> (!directed) {</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#aec05ff3d270a5f888e1623c2a99ff2aa">Graph::NodeIndex</a> node : graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a8a40f2c75615a26ba71e94dd7d42f481">AllNodes</a>()) {</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#a92531459eff09455cfa63976f5024906">Graph::ArcIndex</a> arc : graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aeacdf885cd6777318b5aa4ef864e1066">OutgoingArcs</a>(node)) {</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordflow">if</span> (graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aceb0938bcb2e8e5f37986d4cf8e3a955">Head</a>(arc) == node) ++num_self_arcs;</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> }</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> }</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">if</span> ((graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a4d3fc55a2fe209a908470199437cec9a">num_arcs</a>() - num_self_arcs) % 2 != 0) {</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> fclose(f);</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keywordflow">return</span> absl::Status(absl::StatusCode::kInvalidArgument,</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="stringliteral">"WriteGraphToFile() called with directed=false"</span></div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="stringliteral">" and with a graph with an odd number of (non-self)"</span></div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="stringliteral">" arcs!"</span>);</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> }</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> }</div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> absl::FPrintF(</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> f, <span class="stringliteral">"%d %d"</span>, <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a6a2df5042167b234f6dc3aed4acfa6c9">num_nodes</a>()),</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(directed ? graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a4d3fc55a2fe209a908470199437cec9a">num_arcs</a>()</div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> : (graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a4d3fc55a2fe209a908470199437cec9a">num_arcs</a>() + num_self_arcs) / 2));</div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="keywordflow">if</span> (!num_nodes_with_color.empty()) {</div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">if</span> (std::accumulate(num_nodes_with_color.begin(),</div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> num_nodes_with_color.end(), 0) != graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a6a2df5042167b234f6dc3aed4acfa6c9">num_nodes</a>() ||</div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> *std::min_element(num_nodes_with_color.begin(),</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> num_nodes_with_color.end()) <= 0) {</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keywordflow">return</span> absl::Status(absl::StatusCode::kInvalidArgument,</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="stringliteral">"WriteGraphToFile() called with invalid coloring."</span>);</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> }</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> absl::FPrintF(f, <span class="stringliteral">" %d"</span>, num_nodes_with_color.size());</div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_nodes_with_color.size() - 1; ++i) {</div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> absl::FPrintF(f, <span class="stringliteral">" %d"</span>, <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(num_nodes_with_color[i]));</div>
|
|
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> }</div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> }</div>
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|
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> absl::FPrintF(f, <span class="stringliteral">"\n"</span>);</div>
|
|
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> </div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#aec05ff3d270a5f888e1623c2a99ff2aa">Graph::NodeIndex</a> node : graph.<a class="code hl_function" href="classutil_1_1_base_graph.html#a8a40f2c75615a26ba71e94dd7d42f481">AllNodes</a>()) {</div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#a92531459eff09455cfa63976f5024906">Graph::ArcIndex</a> arc : graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aeacdf885cd6777318b5aa4ef864e1066">OutgoingArcs</a>(node)) {</div>
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|
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">const</span> <span class="keyword">typename</span> <a class="code hl_typedef" href="classutil_1_1_base_graph.html#aec05ff3d270a5f888e1623c2a99ff2aa">Graph::NodeIndex</a> head = graph.<a class="code hl_function" href="classutil_1_1_list_graph.html#aceb0938bcb2e8e5f37986d4cf8e3a955">Head</a>(arc);</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">if</span> (directed || head >= node) {</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> absl::FPrintF(f, <span class="stringliteral">"%d %d\n"</span>, <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(node),</div>
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|
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(head));</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> }</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> }</div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> }</div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="keywordflow">if</span> (fclose(f) != 0) {</div>
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|
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="keywordflow">return</span> absl::Status(absl::StatusCode::kInternal,</div>
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|
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="stringliteral">"Could not close file '"</span> + filename + <span class="stringliteral">"'"</span>);</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> }</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> return ::absl::OkStatus();</div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span>}</div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> </div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span>} <span class="comment">// namespace util</span></div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> </div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span><span class="preprocessor">#endif </span><span class="comment">// UTIL_GRAPH_IO_H_</span></div>
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<div class="ttc" id="aclassutil_1_1_base_graph_html_a4d3fc55a2fe209a908470199437cec9a"><div class="ttname"><a href="classutil_1_1_base_graph.html#a4d3fc55a2fe209a908470199437cec9a">util::BaseGraph::num_arcs</a></div><div class="ttdeci">ArcIndexType num_arcs() const</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00207">graph.h:207</a></div></div>
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<div class="ttc" id="aclassutil_1_1_base_graph_html_a6a2df5042167b234f6dc3aed4acfa6c9"><div class="ttname"><a href="classutil_1_1_base_graph.html#a6a2df5042167b234f6dc3aed4acfa6c9">util::BaseGraph::num_nodes</a></div><div class="ttdeci">NodeIndexType num_nodes() const</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00204">graph.h:204</a></div></div>
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<div class="ttc" id="aclassutil_1_1_base_graph_html_a8a40f2c75615a26ba71e94dd7d42f481"><div class="ttname"><a href="classutil_1_1_base_graph.html#a8a40f2c75615a26ba71e94dd7d42f481">util::BaseGraph::AllNodes</a></div><div class="ttdeci">IntegerRange< NodeIndex > AllNodes() const</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00937">graph.h:937</a></div></div>
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<div class="ttc" id="aclassutil_1_1_base_graph_html_a92531459eff09455cfa63976f5024906"><div class="ttname"><a href="classutil_1_1_base_graph.html#a92531459eff09455cfa63976f5024906">util::BaseGraph< int32_t, int32_t, false >::ArcIndex</a></div><div class="ttdeci">int32_t ArcIndex</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00193">graph.h:193</a></div></div>
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<div class="ttc" id="aclassutil_1_1_base_graph_html_aec05ff3d270a5f888e1623c2a99ff2aa"><div class="ttname"><a href="classutil_1_1_base_graph.html#aec05ff3d270a5f888e1623c2a99ff2aa">util::BaseGraph< int32_t, int32_t, false >::NodeIndex</a></div><div class="ttdeci">int32_t NodeIndex</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00192">graph.h:192</a></div></div>
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<div class="ttc" id="aclassutil_1_1_list_graph_html"><div class="ttname"><a href="classutil_1_1_list_graph.html">util::ListGraph</a></div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l00300">graph.h:300</a></div></div>
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<div class="ttc" id="aclassutil_1_1_list_graph_html_aceb0938bcb2e8e5f37986d4cf8e3a955"><div class="ttname"><a href="classutil_1_1_list_graph.html#aceb0938bcb2e8e5f37986d4cf8e3a955">util::ListGraph::Head</a></div><div class="ttdeci">NodeIndexType Head(ArcIndexType arc) const</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l01119">graph.h:1119</a></div></div>
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<div class="ttc" id="aclassutil_1_1_list_graph_html_aeacdf885cd6777318b5aa4ef864e1066"><div class="ttname"><a href="classutil_1_1_list_graph.html#aeacdf885cd6777318b5aa4ef864e1066">util::ListGraph::OutgoingArcs</a></div><div class="ttdeci">BeginEndWrapper< OutgoingArcIterator > OutgoingArcs(NodeIndexType node) const</div></div>
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<div class="ttc" id="agraph_8h_html"><div class="ttname"><a href="graph_8h.html">graph.h</a></div></div>
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<div class="ttc" id="anamespaceutil_html"><div class="ttname"><a href="namespaceutil.html">util</a></div><div class="ttdef"><b>Definition:</b> <a href="connected__components_8h_source.html#l00056">connected_components.h:56</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2d1e9c029dfaa2e8dfd58862836440b9"><div class="ttname"><a href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9">util::GraphToStringFormat</a></div><div class="ttdeci">GraphToStringFormat</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00038">io.h:38</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2d1e9c029dfaa2e8dfd58862836440b9a59afa9bae775818b44690c5d14cdf8d0"><div class="ttname"><a href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9a59afa9bae775818b44690c5d14cdf8d0">util::PRINT_GRAPH_ARCS</a></div><div class="ttdeci">@ PRINT_GRAPH_ARCS</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00040">io.h:40</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2d1e9c029dfaa2e8dfd58862836440b9ac932364714f74e3ca75990c8126019a1"><div class="ttname"><a href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ac932364714f74e3ca75990c8126019a1">util::PRINT_GRAPH_ADJACENCY_LISTS</a></div><div class="ttdeci">@ PRINT_GRAPH_ADJACENCY_LISTS</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00044">io.h:44</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2d1e9c029dfaa2e8dfd58862836440b9ada36744a3f529ceb03e7c1faa842854d"><div class="ttname"><a href="namespaceutil.html#a2d1e9c029dfaa2e8dfd58862836440b9ada36744a3f529ceb03e7c1faa842854d">util::PRINT_GRAPH_ADJACENCY_LISTS_SORTED</a></div><div class="ttdeci">@ PRINT_GRAPH_ADJACENCY_LISTS_SORTED</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00047">io.h:47</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a2f76166dbe0c4055a1f256235ad00478"><div class="ttname"><a href="namespaceutil.html#a2f76166dbe0c4055a1f256235ad00478">util::Graph</a></div><div class="ttdeci">ListGraph Graph</div><div class="ttdef"><b>Definition:</b> <a href="graph_8h_source.html#l02362">graph.h:2362</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a372b5c94ec5d30f923449516ebc2a963"><div class="ttname"><a href="namespaceutil.html#a372b5c94ec5d30f923449516ebc2a963">util::GraphToString</a></div><div class="ttdeci">std::string GraphToString(const Graph &graph, GraphToStringFormat format)</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00072">io.h:72</a></div></div>
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<div class="ttc" id="anamespaceutil_html_a45fca0c4762006176ad5622ec40dea9c"><div class="ttname"><a href="namespaceutil.html#a45fca0c4762006176ad5622ec40dea9c">util::WriteGraphToFile</a></div><div class="ttdeci">absl::Status WriteGraphToFile(const Graph &graph, const std::string &filename, bool directed, const std::vector< int > &num_nodes_with_color)</div><div class="ttdef"><b>Definition:</b> <a href="io_8h_source.html#l00097">io.h:97</a></div></div>
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