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<div class="title">drat_writer.h</div> </div>
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<a href="drat__writer_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2010-2018 Google LLC</span></div>
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<div class="line"><a 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 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 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 name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div>
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<div class="line"><a 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 name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
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<div class="line"><a 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 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 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 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 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 name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#ifndef OR_TOOLS_SAT_DRAT_WRITER_H_</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#define OR_TOOLS_SAT_DRAT_WRITER_H_</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <string></span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#if !defined(__PORTABLE_PLATFORM__)</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "<a class="code" href="base_2file_8h.html">ortools/base/file.h</a>"</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">class </span><a class="code" href="class_file.html">File</a> {};</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#endif // !__PORTABLE_PLATFORM__</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "absl/types/span.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="sat__base_8h.html">ortools/sat/sat_base.h</a>"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span>sat {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// DRAT is a SAT proof format that allows a simple program to check that the</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// problem is really UNSAT. The description of the format and a checker are</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// available at: // http://www.cs.utexas.edu/~marijn/drat-trim/</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// Note that DRAT proofs are often huge (can be GB), and take about as much time</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// to check as it takes for the solver to find the proof in the first place!</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_writer.html"> 36</a></span> <span class="keyword">class </span><a class="code" href="classoperations__research_1_1sat_1_1_drat_writer.html">DratWriter</a> {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_writer.html#a270466497f7788f605dfb8374cbafa57"> 38</a></span>  <a class="code" href="classoperations__research_1_1sat_1_1_drat_writer.html#a270466497f7788f605dfb8374cbafa57">DratWriter</a>(<span class="keywordtype">bool</span> in_binary_format, <a class="code" href="class_file.html">File</a>* output)</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  : in_binary_format_(in_binary_format), output_(output) {}</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="classoperations__research_1_1sat_1_1_drat_writer.html#aaddc7cfa3444e264600a1a3a192de532">~DratWriter</a>();</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// Writes a new clause to the DRAT output. Note that the RAT property is only</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// checked on the first literal.</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_drat_writer.html#a98bacf41c50979896b4a5f5e41fb0ccf">AddClause</a>(absl::Span<const Literal> clause);</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// Writes a "deletion" information about a clause that has been added before</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// to the DRAT output. Note that it is also possible to delete a clause from</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// the problem.</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_drat_writer.html#a18349231154d0f5eaee94fe213f347e6">DeleteClause</a>(absl::Span<const Literal> clause);</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">void</span> WriteClause(absl::Span<const Literal> clause);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// TODO(user): Support binary format as proof in text format can be large.</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">bool</span> in_binary_format_;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="class_file.html">File</a>* output_;</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  std::string buffer_;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> };</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> } <span class="comment">// namespace sat</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> } <span class="comment">// namespace operations_research</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#endif // OR_TOOLS_SAT_DRAT_WRITER_H_</span></div>
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</div><!-- fragment --></div><!-- contents -->
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</div><!-- doc-content -->
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_writer_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_writer.html">operations_research::sat::DratWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="drat__writer_8h_source.html#l00036">drat_writer.h:36</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_html"><div class="ttname"><a href="namespaceoperations__research.html">operations_research</a></div><div class="ttdoc">The vehicle routing library lets one model and solve generic vehicle routing problems ranging from th...</div><div class="ttdef"><b>Definition:</b> <a href="dense__doubly__linked__list_8h_source.html#l00021">dense_doubly_linked_list.h:21</a></div></div>
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<div class="ttc" id="asat__base_8h_html"><div class="ttname"><a href="sat__base_8h.html">sat_base.h</a></div></div>
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<div class="ttc" id="abase_2file_8h_html"><div class="ttname"><a href="base_2file_8h.html">file.h</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_writer_html_a18349231154d0f5eaee94fe213f347e6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_writer.html#a18349231154d0f5eaee94fe213f347e6">operations_research::sat::DratWriter::DeleteClause</a></div><div class="ttdeci">void DeleteClause(absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="drat__writer_8cc_source.html#l00040">drat_writer.cc:40</a></div></div>
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<div class="ttc" id="aclass_file_html"><div class="ttname"><a href="class_file.html">File</a></div><div class="ttdef"><b>Definition:</b> <a href="base_2file_8h_source.html#l00032">base/file.h:32</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_writer_html_aaddc7cfa3444e264600a1a3a192de532"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_writer.html#aaddc7cfa3444e264600a1a3a192de532">operations_research::sat::DratWriter::~DratWriter</a></div><div class="ttdeci">~DratWriter()</div><div class="ttdef"><b>Definition:</b> <a href="drat__writer_8cc_source.html#l00027">drat_writer.cc:27</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_writer_html_a270466497f7788f605dfb8374cbafa57"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_writer.html#a270466497f7788f605dfb8374cbafa57">operations_research::sat::DratWriter::DratWriter</a></div><div class="ttdeci">DratWriter(bool in_binary_format, File *output)</div><div class="ttdef"><b>Definition:</b> <a href="drat__writer_8h_source.html#l00038">drat_writer.h:38</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_writer_html_a98bacf41c50979896b4a5f5e41fb0ccf"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_writer.html#a98bacf41c50979896b4a5f5e41fb0ccf">operations_research::sat::DratWriter::AddClause</a></div><div class="ttdeci">void AddClause(absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="drat__writer_8cc_source.html#l00036">drat_writer.cc:36</a></div></div>
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