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<div class="headertitle"><div class="title">message_callback_data.cc</div></div>
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<a href="message__callback__data_8cc.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="preprocessor">#include "<a class="code" href="message__callback__data_8h.html">ortools/math_opt/solvers/message_callback_data.h</a>"</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">#include <cstddef></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include <string></span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <utility></span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include "absl/strings/string_view.h"</span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include "absl/types/optional.h"</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include "ortools/math_opt/callback.pb.h"</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="keyword">namespace </span>math_opt {</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"><a class="line" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a1bb167564d01c2c7e0d7a6c56b51178e"> 27</a></span>absl::optional<CallbackDataProto> <a class="code hl_function" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a1bb167564d01c2c7e0d7a6c56b51178e">MessageCallbackData::Parse</a>(</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">const</span> absl::string_view <a class="code hl_variable" href="trace_8cc.html#a36bd74109f547f7f8198faf5a12d2879">message</a>) {</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> CallbackDataProto data;</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// Iterate on all complete lines (lines ending with a '\n').</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> absl::string_view remainder = <a class="code hl_variable" href="trace_8cc.html#a36bd74109f547f7f8198faf5a12d2879">message</a>;</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">for</span> (std::size_t end = 0; end = remainder.find(<span class="charliteral">'\n'</span>), end != remainder.npos;</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> remainder = remainder.substr(end + 1)) {</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">const</span> <span class="keyword">auto</span> line = remainder.substr(0, end);</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keywordflow">if</span> (!unfinished_line_.empty()) {</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> std::string& new_message = *data.add_messages();</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> new_message = std::move(unfinished_line_);</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> unfinished_line_.clear();</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> new_message += line;</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> data.add_messages(std::string(line));</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> }</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> }</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">// At the end of the loop, the remainder may contains the last unfinished</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// line. This could be the first line too if the entire message does not</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// contain '\n'.</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> unfinished_line_ += remainder;</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// It is an error to call the user callback without any message.</span></div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">if</span> (data.messages().empty()) {</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">return</span> absl::nullopt;</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="comment">// We only need to set that if we have messages.</span></div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> data.set_event(CALLBACK_EVENT_MESSAGE);</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">return</span> data;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span>}</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"><a class="line" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a8caf07a427bdefa52380ed652d3428ae"> 62</a></span>absl::optional<CallbackDataProto> <a class="code hl_function" href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a8caf07a427bdefa52380ed652d3428ae">MessageCallbackData::Flush</a>() {</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">if</span> (unfinished_line_.empty()) {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">return</span> absl::nullopt;</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> CallbackDataProto data;</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> data.set_event(CALLBACK_EVENT_MESSAGE);</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> *data.add_messages() = std::move(unfinished_line_);</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> unfinished_line_.clear();</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">return</span> data;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span>}</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span>} <span class="comment">// namespace math_opt</span></div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span>} <span class="comment">// namespace operations_research</span></div>
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<div class="ttc" id="aclassoperations__research_1_1math__opt_1_1_message_callback_data_html_a1bb167564d01c2c7e0d7a6c56b51178e"><div class="ttname"><a href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a1bb167564d01c2c7e0d7a6c56b51178e">operations_research::math_opt::MessageCallbackData::Parse</a></div><div class="ttdeci">absl::optional< CallbackDataProto > Parse(absl::string_view message)</div><div class="ttdef"><b>Definition:</b> <a href="message__callback__data_8cc_source.html#l00027">message_callback_data.cc:27</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1math__opt_1_1_message_callback_data_html_a8caf07a427bdefa52380ed652d3428ae"><div class="ttname"><a href="classoperations__research_1_1math__opt_1_1_message_callback_data.html#a8caf07a427bdefa52380ed652d3428ae">operations_research::math_opt::MessageCallbackData::Flush</a></div><div class="ttdeci">absl::optional< CallbackDataProto > Flush()</div><div class="ttdef"><b>Definition:</b> <a href="message__callback__data_8cc_source.html#l00062">message_callback_data.cc:62</a></div></div>
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<div class="ttc" id="amessage__callback__data_8h_html"><div class="ttname"><a href="message__callback__data_8h.html">message_callback_data.h</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">Collection of objects used to extend the Constraint Solver library.</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="atrace_8cc_html_a36bd74109f547f7f8198faf5a12d2879"><div class="ttname"><a href="trace_8cc.html#a36bd74109f547f7f8198faf5a12d2879">message</a></div><div class="ttdeci">std::string message</div><div class="ttdef"><b>Definition:</b> <a href="trace_8cc_source.html#l00398">trace.cc:398</a></div></div>
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