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<a href="model__update__merge_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>&#160;<span class="comment">// Copyright 2010-2021 Google LLC</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#ifndef OR_TOOLS_MATH_OPT_CORE_MODEL_UPDATE_MERGE_H_</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#define OR_TOOLS_MATH_OPT_CORE_MODEL_UPDATE_MERGE_H_</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;cstdint&gt;</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="base_2logging_8h.html">ortools/base/logging.h</a>&quot;</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &quot;ortools/math_opt/model_update.pb.h&quot;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#include &quot;ortools/math_opt/sparse_containers.pb.h&quot;</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">namespace </span>math_opt {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment">// Merges the `from` update into the `into` one.</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment">// The `from` update must represent an update that happens after the `into` one</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment">// is applied. Thus when the two updates have overlaps, the `from` one overrides</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment">// the value of the `into` one (i.e. the `from` update is expected to be more</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="comment">// recent).</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment">// This function also CHECKs that the ids of new variables and constraints in</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment">// `from` are greater than the ones in `into` (as expected if `from` happens</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="comment">// after `into`).</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="comment">// Note that the complexity is O(size(from) + size(into)) thus if you need to</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="comment">// merge a long list of updates this may be not efficient enough. In that case</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="comment">// an n-way merge would be needed to be implemented here.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1math__opt.html#a7d985a3b070ce01cf116dddc485ba38f">MergeIntoUpdate</a>(<span class="keyword">const</span> ModelUpdateProto&amp; from, ModelUpdateProto&amp; into);</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceinternal.html">internal</a> {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="comment">// Merges the `from` list of sorted ids into the `into` one. Duplicates are</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="comment">// removed.</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1math__opt_1_1internal.html#affe1b0ec468733f8ea63444b8daf16a0">MergeIntoSortedIds</a>(<span class="keyword">const</span> google::protobuf::RepeatedField&lt;int64_t&gt;&amp; from,</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; google::protobuf::RepeatedField&lt;int64_t&gt;&amp; into);</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="comment">// Merges the `from` sparse vector into the `into` one. When the two vectors</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="comment">// have overlaps, the value in `from` is used to overwrite the one in `into`.</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="comment">// The SparseVector type is either SparseDoubleVectorProto or</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="comment">// SparseBoolVectorProto.</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> SparseVector&gt;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1math__opt_1_1internal.html#ab18c9cf185877b1db6b14f1838a35b0c">MergeIntoSparseVector</a>(<span class="keyword">const</span> SparseVector&amp; from, SparseVector&amp; into);</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="comment">// Merges the `from` sparse matrix into the `into` one. When the two matrices</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="comment">// have overlaps, the value in `from` is used to overwrite the one in `into`.</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1math__opt_1_1internal.html#af9a48803f960f4e5f6218270c82abae3">MergeIntoSparseDoubleMatrix</a>(<span class="keyword">const</span> SparseDoubleMatrixProto&amp; from,</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; SparseDoubleMatrixProto&amp; into);</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;} <span class="comment">// namespace internal</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="comment">// Inline functions implementations.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceinternal.html">internal</a> {</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> SparseVector&gt;</div><div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1math__opt_1_1internal.html#ab18c9cf185877b1db6b14f1838a35b0c"> 72</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1math__opt_1_1internal.html#ab18c9cf185877b1db6b14f1838a35b0c">MergeIntoSparseVector</a>(<span class="keyword">const</span> SparseVector&amp; from, SparseVector&amp; into) {</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(from.ids_size(), from.values_size());</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(into.ids_size(), into.values_size());</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; SparseVector result;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keyword">auto</span>&amp; result_ids = *result.mutable_ids();</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keyword">auto</span>&amp; result_values = *result.mutable_values();</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="comment">// We don&#39;t reserve the sum of the sizes of both sparse vectors since they can</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="comment">// contain overlapping ids. But we know that we will have at least the max</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// length of either vector.</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> max_size = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(from.ids_size(), into.ids_size());</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; result_ids.Reserve(max_size);</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; result_values.Reserve(max_size);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordtype">int</span> from_i = 0;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordtype">int</span> into_i = 0;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordflow">while</span> (from_i &lt; from.ids_size() &amp;&amp; into_i &lt; into.ids_size()) {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="keywordflow">if</span> (from.ids(from_i) &lt; into.ids(into_i)) {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; result_ids.Add(from.ids(from_i));</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; result_values.Add(from.values(from_i));</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; ++from_i;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (from.ids(from_i) &gt; into.ids(into_i)) {</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; result_ids.Add(into.ids(into_i));</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; result_values.Add(into.values(into_i));</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; ++into_i;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; } <span class="keywordflow">else</span> { <span class="comment">// from.ids(from_i) == into.ids(into_i)</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; result_ids.Add(from.ids(from_i));</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; result_values.Add(from.values(from_i));</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; ++from_i;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; ++into_i;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; }</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="comment">// At this point either from_i == from.ids_size() or to_i == to.ids_size() (or</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="comment">// both). And the one that is not empty, if it exists, has elements greater</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="comment">// than all other elements already inserted.</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> remaining_size =</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(from.ids_size() - from_i, into.ids_size() - into_i);</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; result_ids.Reserve(result_ids.size() + remaining_size);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; result_values.Reserve(result_values.size() + remaining_size);</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <span class="keywordflow">for</span> (; from_i &lt; from.ids_size(); ++from_i) {</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; result_ids.Add(from.ids(from_i));</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; result_values.Add(from.values(from_i));</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; }</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordflow">for</span> (; into_i &lt; into.ids_size(); ++into_i) {</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; result_ids.Add(into.ids(into_i));</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; result_values.Add(into.values(into_i));</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; }</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; into.Swap(&amp;result);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;}</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;} <span class="comment">// namespace internal</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;} <span class="comment">// namespace math_opt</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;} <span class="comment">// namespace operations_research</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;<span class="preprocessor">#endif // OR_TOOLS_MATH_OPT_CORE_MODEL_UPDATE_MERGE_H_</span></div><div class="ttc" id="namespaceoperations__research_1_1math__opt_1_1internal_html_affe1b0ec468733f8ea63444b8daf16a0"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt_1_1internal.html#affe1b0ec468733f8ea63444b8daf16a0">operations_research::math_opt::internal::MergeIntoSortedIds</a></div><div class="ttdeci">void MergeIntoSortedIds(const google::protobuf::RepeatedField&lt; int64_t &gt; &amp;from, google::protobuf::RepeatedField&lt; int64_t &gt; &amp;into)</div><div class="ttdef"><b>Definition:</b> <a href="model__update__merge_8cc_source.html#l00087">model_update_merge.cc:87</a></div></div>
<div class="ttc" id="namespaceoperations__research_1_1math__opt_1_1internal_html_ab18c9cf185877b1db6b14f1838a35b0c"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt_1_1internal.html#ab18c9cf185877b1db6b14f1838a35b0c">operations_research::math_opt::internal::MergeIntoSparseVector</a></div><div class="ttdeci">void MergeIntoSparseVector(const SparseVector &amp;from, SparseVector &amp;into)</div><div class="ttdef"><b>Definition:</b> <a href="model__update__merge_8h_source.html#l00072">model_update_merge.h:72</a></div></div>
<div class="ttc" id="namespaceoperations__research_1_1math__opt_html_a7d985a3b070ce01cf116dddc485ba38f"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#a7d985a3b070ce01cf116dddc485ba38f">operations_research::math_opt::MergeIntoUpdate</a></div><div class="ttdeci">void MergeIntoUpdate(const ModelUpdateProto &amp;from, ModelUpdateProto &amp;into)</div><div class="ttdef"><b>Definition:</b> <a href="model__update__merge_8cc_source.html#l00030">model_update_merge.cc:30</a></div></div>
<div class="ttc" id="alldiff__cst_8cc_html_a26e6db9bcc64b584051ecc28171ed11f"><div class="ttname"><a href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">max</a></div><div class="ttdeci">int64_t max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00140">alldiff_cst.cc:140</a></div></div>
<div class="ttc" id="base_2logging_8h_html_a7c0ce053b28d53aa4eaf3eb7fb71663b"><div class="ttname"><a href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a></div><div class="ttdeci">#define CHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00702">base/logging.h:702</a></div></div>
<div class="ttc" id="base_2logging_8h_html"><div class="ttname"><a href="base_2logging_8h.html">logging.h</a></div></div>
<div class="ttc" id="namespaceinternal_html"><div class="ttname"><a href="namespaceinternal.html">internal</a></div><div class="ttdef"><b>Definition:</b> <a href="bop__parameters_8pb_8h_source.html#l00039">bop_parameters.pb.h:39</a></div></div>
<div class="ttc" id="namespaceoperations__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>
<div class="ttc" id="namespaceoperations__research_1_1math__opt_1_1internal_html_af9a48803f960f4e5f6218270c82abae3"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt_1_1internal.html#af9a48803f960f4e5f6218270c82abae3">operations_research::math_opt::internal::MergeIntoSparseDoubleMatrix</a></div><div class="ttdeci">void MergeIntoSparseDoubleMatrix(const SparseDoubleMatrixProto &amp;from, SparseDoubleMatrixProto &amp;into)</div><div class="ttdef"><b>Definition:</b> <a href="model__update__merge_8cc_source.html#l00127">model_update_merge.cc:127</a></div></div>
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