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<div class="title">/data/users/hoss/faiss/IVFlib.cpp</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// -*- c++ -*-</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "IVFlib.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <memory></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">#include "VectorTransform.h"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "FaissAssert.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> </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="keyword">namespace </span>faiss { <span class="keyword">namespace </span>ivflib {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keywordtype">void</span> check_compatible_for_merge (<span class="keyword">const</span> Index * index0,</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">const</span> Index * index1)</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a> *pt0 =</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a> *<span class="keyword">></span>(index0);</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (pt0) {</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a> *pt1 =</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a> *<span class="keyword">></span>(index1);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  FAISS_THROW_IF_NOT_MSG (pt1, <span class="stringliteral">"both indexes should be pretransforms"</span>);</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  FAISS_THROW_IF_NOT (pt0->chain.size() == pt1->chain.size());</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < pt0->chain.size(); i++) {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  FAISS_THROW_IF_NOT (<span class="keyword">typeid</span>(pt0->chain[i]) == <span class="keyword">typeid</span>(pt1->chain[i]));</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  }</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  index0 = pt0-><a class="code" href="structfaiss_1_1IndexPreTransform.html#aee3cbbe7915ec9ed13d59ca9276bdefc">index</a>;</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  index1 = pt1-><a class="code" href="structfaiss_1_1IndexPreTransform.html#aee3cbbe7915ec9ed13d59ca9276bdefc">index</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>  FAISS_THROW_IF_NOT (<span class="keyword">typeid</span>(index0) == <span class="keyword">typeid</span>(index1));</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  FAISS_THROW_IF_NOT (index0->d == index1->d &&</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  index0->metric_type == index1->metric_type);</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="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> *ivf0 = <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> *<span class="keyword">></span>(index0);</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (ivf0) {</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> *ivf1 =</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a> *<span class="keyword">></span>(index1);</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  FAISS_THROW_IF_NOT (ivf1);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  ivf0-><a class="code" href="structfaiss_1_1IndexIVF.html#a7fc8b9a1fff9f3d24cf7055fbc4fed7b">check_compatible_for_merge</a> (*ivf1);</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> </div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// TODO: check as thoroughfully for other index types</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </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> </div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">const</span> IndexIVF * extract_index_ivf (<span class="keyword">const</span> Index * index)</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="keywordflow">if</span> (<span class="keyword">auto</span> *pt =</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  dynamic_cast<const IndexPreTransform *>(index)) {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  index = pt->index;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">auto</span> *ivf = <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexIVF *<span class="keyword">></span>(index);</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  FAISS_THROW_IF_NOT (ivf);</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> ivf;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> }</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> IndexIVF * extract_index_ivf (Index * index) {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> <span class="keyword">const_cast<</span>IndexIVF*<span class="keyword">></span> (extract_index_ivf ((<span class="keyword">const</span> Index*)(index)));</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keywordtype">void</span> merge_into(<a class="code" href="structfaiss_1_1Index.html">faiss::Index</a> *index0, <a class="code" href="structfaiss_1_1Index.html">faiss::Index</a> *index1, <span class="keywordtype">bool</span> shift_ids) {</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  check_compatible_for_merge (index0, index1);</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  IndexIVF * ivf0 = extract_index_ivf (index0);</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  IndexIVF * ivf1 = extract_index_ivf (index1);</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  ivf0->merge_from (*ivf1, shift_ids ? ivf0->ntotal : 0);</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// useful for IndexPreTransform</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  index0-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = ivf0->ntotal;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  index1-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = ivf1->ntotal;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keywordtype">void</span> search_centroid(<a class="code" href="structfaiss_1_1Index.html">faiss::Index</a> *index,</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* x, <span class="keywordtype">int</span> n,</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  idx_t* centroid_ids)</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> {</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  std::unique_ptr<float[]> del;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> (<span class="keyword">auto</span> index_pre = dynamic_cast<faiss::IndexPreTransform*>(index)) {</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  x = index_pre->apply_chain(n, x);</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  del.reset((<span class="keywordtype">float</span>*)x);</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  index = index_pre->index;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  }</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a>* index_ivf = <span class="keyword">dynamic_cast<</span><a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a>*<span class="keyword">></span>(index);</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  assert(index_ivf);</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  index_ivf-><a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a>(n, x, centroid_ids);</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> }</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="keywordtype">void</span> search_and_return_centroids(<a class="code" href="structfaiss_1_1Index.html">faiss::Index</a> *index,</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">size_t</span> n,</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">const</span> <span class="keywordtype">float</span>* xin,</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">long</span> k,</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">float</span> *distances,</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  idx_t* labels,</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  idx_t* query_centroid_ids,</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  idx_t* result_centroid_ids)</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> {</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *x = xin;</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  std::unique_ptr<float []> del;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (<span class="keyword">auto</span> index_pre = dynamic_cast<faiss::IndexPreTransform*>(index)) {</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  x = index_pre->apply_chain(n, x);</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  del.reset((<span class="keywordtype">float</span>*)x);</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  index = index_pre->index;</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a>* index_ivf = <span class="keyword">dynamic_cast<</span><a class="code" href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a>*<span class="keyword">></span>(index);</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  assert(index_ivf);</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">size_t</span> nprobe = index_ivf-><a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  std::vector<idx_t> cent_nos (n * nprobe);</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  std::vector<float> cent_dis (n * nprobe);</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  index_ivf-><a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-><a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a>(</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  n, x, nprobe, cent_dis.data(), cent_nos.data());</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (query_centroid_ids) {</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n; i++)</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  query_centroid_ids[i] = cent_nos[i * nprobe];</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  index_ivf-><a class="code" href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">search_preassigned</a> (n, x, k,</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  cent_nos.data(), cent_dis.data(),</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  distances, labels, <span class="keyword">true</span>);</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < n * k; i++) {</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  idx_t label = labels[i];</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (label < 0) {</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">if</span> (result_centroid_ids)</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  result_centroid_ids[i] = -1;</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">long</span> list_no = label >> 32;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">long</span> list_index = label & 0xffffffff;</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (result_centroid_ids)</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  result_centroid_ids[i] = list_no;</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  labels[i] = index_ivf-><a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-><a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a>(list_no, list_index);</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> }</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div>
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<div class="line"><a name="l00159"></a><span class="lineno"><a class="line" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6347809123313ca945defdc7ddcd1465"> 159</a></span> <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6347809123313ca945defdc7ddcd1465">SlidingIndexWindow::SlidingIndexWindow</a> (<a class="code" href="structfaiss_1_1Index.html">Index</a> *index): index (index) {</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a> = 0;</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a>* index_ivf = <span class="keyword">const_cast<</span><a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a>*<span class="keyword">></span>(extract_index_ivf (index));</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a> = <span class="keyword">dynamic_cast<</span><a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a> *<span class="keyword">></span> (index_ivf-><a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>);</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">nlist</a> = <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1InvertedLists.html#afaf8b7aa3e846aa4553f6aae67827ec8">nlist</a>;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  FAISS_THROW_IF_NOT_MSG (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>,</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="stringliteral">"only supports indexes with ArrayInvertedLists"</span>);</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>.resize(<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">nlist</a>);</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> }</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">template</span><<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">static</span> <span class="keywordtype">void</span> shift_and_add (std::vector<T> & dst,</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">size_t</span> <span class="keyword">remove</span>,</div>
|
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">const</span> std::vector<T> & src)</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> {</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (<span class="keyword">remove</span> > 0)</div>
|
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  memmove (dst.data(), dst.data() + <span class="keyword">remove</span>,</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  (dst.size() - <span class="keyword">remove</span>) * <span class="keyword">sizeof</span> (T));</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">size_t</span> insert_point = dst.size() - <span class="keyword">remove</span>;</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  dst.resize (insert_point + src.size());</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  memcpy (dst.data() + insert_point, src.data (), src.size() * <span class="keyword">sizeof</span>(T));</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> }</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div>
|
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">template</span><<span class="keyword">class</span> T></div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="keyword">static</span> <span class="keywordtype">void</span> remove_from_begin (std::vector<T> & v,</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">size_t</span> <span class="keyword">remove</span>)</div>
|
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> {</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> (<span class="keyword">remove</span> > 0)</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  v.erase (v.begin(), v.begin() + <span class="keyword">remove</span>);</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
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<div class="line"><a name="l00190"></a><span class="lineno"><a class="line" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#accf1c7b8de188b74de0d6827beceac7c"> 190</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#accf1c7b8de188b74de0d6827beceac7c">SlidingIndexWindow::step</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html">Index</a> *sub_index, <span class="keywordtype">bool</span> remove_oldest) {</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  FAISS_THROW_IF_NOT_MSG (!remove_oldest || <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a> > 0,</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="stringliteral">"cannot remove slice: there is none"</span>);</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a> *ils2 = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span>(sub_index) {</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  check_compatible_for_merge (index, sub_index);</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  ils2 = <span class="keyword">dynamic_cast<</span><span class="keyword">const </span><a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a>*<span class="keyword">></span>(</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  extract_index_ivf (sub_index)-><a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>);</div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  FAISS_THROW_IF_NOT_MSG (ils2, <span class="stringliteral">"supports only ArrayInvertedLists"</span>);</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> *index_ivf = extract_index_ivf (index);</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> (remove_oldest && ils2) {</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">nlist</a>; i++) {</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  std::vector<size_t> & sizesi = <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i];</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordtype">size_t</span> amount_to_remove = sizesi[0];</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  index_ivf-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += ils2-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i].size() - amount_to_remove;</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  shift_and_add (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i], amount_to_remove, ils2-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i]);</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  shift_and_add (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>->codes[i], amount_to_remove * <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a>,</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  ils2->codes[i]);</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j + 1 < <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a>; j++) {</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  sizesi[j] = sizesi[j + 1] - amount_to_remove;</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  sizesi[n_slice - 1] = <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i].size();</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ils2) {</div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">nlist</a>; i++) {</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  index_ivf-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += ils2-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i].size();</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  shift_and_add (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i], 0, ils2-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i]);</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  shift_and_add (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>->codes[i], 0, ils2->codes[i]);</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i].push_back(<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i].size());</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a>++;</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (remove_oldest) {</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">nlist</a>; i++) {</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordtype">size_t</span> amount_to_remove = <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i][0];</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  index_ivf-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> -= amount_to_remove;</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  remove_from_begin (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[i], amount_to_remove);</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  remove_from_begin (<a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>->codes[i],</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  amount_to_remove * <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">ils</a>-><a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a>);</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j + 1 < <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a>; j++) {</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i][j] = <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i][j + 1] - amount_to_remove;</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">sizes</a>[i].pop_back ();</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <a class="code" href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">n_slice</a>--;</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  FAISS_THROW_MSG (<span class="stringliteral">"nothing to do???"</span>);</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  index-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = index_ivf-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> }</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment">// Get a subset of inverted lists [i0, i1). Works on IndexIVF's and</span></div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment">// IndexIVF's embedded in a IndexPreTransform</span></div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a> *</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> get_invlist_range (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html">Index</a> *index, <span class="keywordtype">long</span> i0, <span class="keywordtype">long</span> i1)</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> {</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> *ivf = extract_index_ivf (index);</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  FAISS_THROW_IF_NOT (0 <= i0 && i0 <= i1 && i1 <= ivf->nlist);</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> *src = ivf-><a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>;</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a> * il = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a>(i1 - i0, src-><a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a>);</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = i0; i < i1; i++) {</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  il->add_entries(i - i0, src-><a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a>(i),</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <a class="code" href="structfaiss_1_1InvertedLists_1_1ScopedIds.html">InvertedLists::ScopedIds</a> (src, i).get(),</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <a class="code" href="structfaiss_1_1InvertedLists_1_1ScopedCodes.html">InvertedLists::ScopedCodes</a> (src, i).get());</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  }</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">return</span> il;</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> }</div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keywordtype">void</span> set_invlist_range (Index *index, <span class="keywordtype">long</span> i0, <span class="keywordtype">long</span> i1,</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  ArrayInvertedLists * src)</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> {</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  IndexIVF *ivf = extract_index_ivf (index);</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  FAISS_THROW_IF_NOT (0 <= i0 && i0 <= i1 && i1 <= ivf->nlist);</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  ArrayInvertedLists *dst = <span class="keyword">dynamic_cast<</span>ArrayInvertedLists *<span class="keyword">></span>(ivf->invlists);</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  FAISS_THROW_IF_NOT_MSG (dst, <span class="stringliteral">"only ArrayInvertedLists supported"</span>);</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  FAISS_THROW_IF_NOT (src->nlist == i1 - i0 &&</div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  dst->code_size == src->code_size);</div>
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> </div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordtype">size_t</span> ntotal = index->ntotal;</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = i0 ; i < i1; i++) {</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  ntotal -= dst->list_size (i);</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  ntotal += src->list_size (i - i0);</div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  std::swap (src->codes[i - i0], dst->codes[i]);</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  std::swap (src->ids[i - i0], dst->ids[i]);</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  }</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  ivf->ntotal = index->ntotal = ntotal;</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> }</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="keywordtype">void</span> search_with_parameters (<span class="keyword">const</span> Index *index,</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  idx_t n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, idx_t k,</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordtype">float</span> *distances, idx_t *labels,</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  IVFSearchParameters *params)</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> {</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  FAISS_THROW_IF_NOT (params);</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *prev_x = x;</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  ScopeDeleter<float> del;</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (<span class="keyword">auto</span> ip = dynamic_cast<const IndexPreTransform *> (index)) {</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  x = ip->apply_chain (n, x);</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (x != prev_x) {</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  del.set(x);</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  index = ip->index;</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  std::vector<idx_t> Iq(params->nprobe * n);</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  std::vector<float> Dq(params->nprobe * n);</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> </div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">const</span> IndexIVF *index_ivf = <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexIVF *<span class="keyword">></span>(index);</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  FAISS_THROW_IF_NOT (index_ivf);</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  index_ivf->quantizer->search(n, x, params->nprobe,</div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  Dq.data(), Iq.data());</div>
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
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<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  index_ivf->search_preassigned(n, x, k, Iq.data(), Dq.data(),</div>
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<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  distances, labels,</div>
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<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keyword">false</span>, params);</div>
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<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> }</div>
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<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div>
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<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div>
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<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> </div>
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<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> } } <span class="comment">// namespace faiss::ivflib</span></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00090">IndexIVF.h:90</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexPreTransform_html_aee3cbbe7915ec9ed13d59ca9276bdefc"><div class="ttname"><a href="structfaiss_1_1IndexPreTransform.html#aee3cbbe7915ec9ed13d59ca9276bdefc">faiss::IndexPreTransform::index</a></div><div class="ttdeci">Index * index</div><div class="ttdoc">! chain of tranforms </div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00274">VectorTransform.h:274</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7cf3a1963394f87d61913420a66eb468"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7cf3a1963394f87d61913420a66eb468">faiss::IndexIVF::search_preassigned</a></div><div class="ttdeci">virtual void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs, const IVFSearchParameters *params=nullptr) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00250">IndexIVF.cpp:250</a></div></div>
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<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html">faiss::ArrayInvertedLists</a></div><div class="ttdoc">simple (default) implementation as an array of inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00182">InvertedLists.h:182</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7fc8b9a1fff9f3d24cf7055fbc4fed7b"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7fc8b9a1fff9f3d24cf7055fbc4fed7b">faiss::IndexIVF::check_compatible_for_merge</a></div><div class="ttdeci">void check_compatible_for_merge(const IndexIVF &other) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00710">IndexIVF.cpp:710</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_affed235eadf27a13d753ee4d33a1dc58"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">faiss::IndexIVF::nprobe</a></div><div class="ttdeci">size_t nprobe</div><div class="ttdoc">number of probes at query time </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00097">IndexIVF.h:97</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c"><div class="ttname"><a href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">faiss::Index::assign</a></div><div class="ttdeci">void assign(idx_t n, const float *x, idx_t *labels, idx_t k=1)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00034">Index.cpp:34</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_html_a9bd256053ee360473842105460fe285f"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">faiss::InvertedLists::list_size</a></div><div class="ttdeci">virtual size_t list_size(size_t list_no) const =0</div><div class="ttdoc">get the size of a list </div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_ac124372fd2b67bb901f0c71235165216"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#ac124372fd2b67bb901f0c71235165216">faiss::ivflib::SlidingIndexWindow::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">same as index-&gt;nlist </div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8h_source.html#l00094">IVFlib.h:94</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexPreTransform_html"><div class="ttname"><a href="structfaiss_1_1IndexPreTransform.html">faiss::IndexPreTransform</a></div><div class="ttdef"><b>Definition:</b> <a href="VectorTransform_8h_source.html#l00271">VectorTransform.h:271</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html">faiss::InvertedLists</a></div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00031">InvertedLists.h:31</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_html_a21b52cdb0601cd225bd7924932310876"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">faiss::InvertedLists::get_single_id</a></div><div class="ttdeci">virtual idx_t get_single_id(size_t list_no, size_t offset) const </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8cpp_source.html#l00035">InvertedLists.cpp:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_html_ae06049e4259edb47d443ef87bdedc744"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">faiss::InvertedLists::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00035">InvertedLists.h:35</a></div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_a10d876a9c750bc95986a22a57cf4fdc7"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a10d876a9c750bc95986a22a57cf4fdc7">faiss::ivflib::SlidingIndexWindow::ils</a></div><div class="ttdeci">ArrayInvertedLists * ils</div><div class="ttdoc">InvertedLists of index. </div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8h_source.html#l00088">IVFlib.h:88</a></div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_a8defa5121e371e64071c0eb956ad20d1"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a8defa5121e371e64071c0eb956ad20d1">faiss::ivflib::SlidingIndexWindow::n_slice</a></div><div class="ttdeci">int n_slice</div><div class="ttdoc">number of slices currently in index </div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8h_source.html#l00091">IVFlib.h:91</a></div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_a6dfc430601d194c428c2a25e3afa4492"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6dfc430601d194c428c2a25e3afa4492">faiss::ivflib::SlidingIndexWindow::sizes</a></div><div class="ttdeci">std::vector< std::vector< size_t > > sizes</div><div class="ttdoc">cumulative list sizes at each slice </div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8h_source.html#l00097">IVFlib.h:97</a></div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_a6347809123313ca945defdc7ddcd1465"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#a6347809123313ca945defdc7ddcd1465">faiss::ivflib::SlidingIndexWindow::SlidingIndexWindow</a></div><div class="ttdeci">SlidingIndexWindow(Index *index)</div><div class="ttdoc">index should be initially empty and trained </div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8cpp_source.html#l00159">IVFlib.cpp:159</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7"><div class="ttname"><a href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">faiss::Index::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0</div></div>
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<div class="ttc" id="structfaiss_1_1ivflib_1_1SlidingIndexWindow_html_accf1c7b8de188b74de0d6827beceac7c"><div class="ttname"><a href="structfaiss_1_1ivflib_1_1SlidingIndexWindow.html#accf1c7b8de188b74de0d6827beceac7c">faiss::ivflib::SlidingIndexWindow::step</a></div><div class="ttdeci">void step(const Index *sub_index, bool remove_oldest)</div><div class="ttdef"><b>Definition:</b> <a href="IVFlib_8cpp_source.html#l00190">IVFlib.cpp:190</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_html_afaf8b7aa3e846aa4553f6aae67827ec8"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#afaf8b7aa3e846aa4553f6aae67827ec8">faiss::InvertedLists::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00034">InvertedLists.h:34</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_aa0e8fc5e04cbd8e0dde61f98bc7dd0bc"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">faiss::IndexIVF::invlists</a></div><div class="ttdeci">InvertedLists * invlists</div><div class="ttdoc">Acess to the actual data. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00092">IndexIVF.h:92</a></div></div>
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<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html_a48563a58d3bbfbb4334f3afdf2c9ba7a"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">faiss::ArrayInvertedLists::ids</a></div><div class="ttdeci">std::vector< std::vector< idx_t > > ids</div><div class="ttdoc">Inverted lists for indexes. </div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00184">InvertedLists.h:184</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00061">Index.h:61</a></div></div>
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<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a3cf99e2ee92b8558a066f821efab95d5"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">faiss::Level1Quantizer::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00032">IndexIVF.h:32</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_1_1ScopedIds_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists_1_1ScopedIds.html">faiss::InvertedLists::ScopedIds</a></div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00136">InvertedLists.h:136</a></div></div>
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<div class="ttc" id="structfaiss_1_1InvertedLists_1_1ScopedCodes_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists_1_1ScopedCodes.html">faiss::InvertedLists::ScopedCodes</a></div><div class="ttdef"><b>Definition:</b> <a href="InvertedLists_8h_source.html#l00156">InvertedLists.h:156</a></div></div>
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