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<div class="title">/tmp/faiss/AuxIndexStructures.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</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;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">// Auxiliary index structures, that are used in indexes but that can</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// be forward-declared</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 FAISS_AUX_INDEX_STRUCTURES_H</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define FAISS_AUX_INDEX_STRUCTURES_H</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;unordered_set&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &quot;Index.h&quot;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">/** The objective is to have a simple result structure while</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> *  minimizing the number of mem copies in the result. The method</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> *  do_allocation can be overloaded to allocate the result tables in</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment"> *  the matrix type of a scripting language like Lua or Python. */</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html">   31</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> {</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">   32</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">nq</a>;      <span class="comment">///&lt; nb of queries</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html#aef57f9db99ca470c01bcdce0366cb6ff">   33</a></span>&#160;<span class="comment"></span>    <span class="keywordtype">size_t</span> *<a class="code" href="structfaiss_1_1RangeSearchResult.html#aef57f9db99ca470c01bcdce0366cb6ff">lims</a>;   <span class="comment">///&lt; size (nq + 1)</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">   37</a></span>&#160;    idx_t *<a class="code" href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">labels</a>;     <span class="comment">///&lt; result for query i is labels[lims[i]:lims[i+1]]</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html#a944a93aecc7b51d8f9f35444280aa919">   38</a></span>&#160;<span class="comment"></span>    <span class="keywordtype">float</span> *<a class="code" href="structfaiss_1_1RangeSearchResult.html#a944a93aecc7b51d8f9f35444280aa919">distances</a>;  <span class="comment">///&lt; corresponding distances (not sorted)</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchResult.html#a39342ad2e9ad8b90f6e95dafd3287f49">   40</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1RangeSearchResult.html#a39342ad2e9ad8b90f6e95dafd3287f49">buffer_size</a>; <span class="comment">///&lt; size of the result buffers used</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment"></span><span class="comment"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">    /// lims must be allocated on input to range_search.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment"></span>    <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1RangeSearchResult.html#a56dca2b151bcf16f5d488aff321b9501">RangeSearchResult</a> (idx_t <a class="code" href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">nq</a>, <span class="keywordtype">bool</span> alloc_lims=<span class="keyword">true</span>);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">    /// called when lims contains the nb of elements result entries</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment">    /// for each query</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment"></span>    <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1RangeSearchResult.html#a34c4ba599c0cec45972af19e1f98f22a">do_allocation</a> ();</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    <span class="keyword">virtual</span> ~<a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> ();</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;};</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</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">/** Encapsulates a set of ids to remove. */</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="structfaiss_1_1IDSelector.html">   54</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> {</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keyword">virtual</span> <span class="keywordtype">bool</span> is_member (idx_t <span class="keywordtype">id</span>) <span class="keyword">const</span> = 0;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keyword">virtual</span> ~<a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a>() {}</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;};</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="comment">/** remove ids between [imni, imax) */</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="structfaiss_1_1IDSelectorRange.html">   63</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IDSelectorRange.html">IDSelectorRange</a>: <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> {</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    idx_t imin, imax;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    <a class="code" href="structfaiss_1_1IDSelectorRange.html">IDSelectorRange</a> (idx_t imin, idx_t imax);</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    <span class="keywordtype">bool</span> is_member(idx_t <span class="keywordtype">id</span>) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    ~<a class="code" href="structfaiss_1_1IDSelectorRange.html">IDSelectorRange</a>()<span class="keyword"> override </span>{}</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;};</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="comment"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment">/** Remove ids from a set. Repetitions of ids in the indices set</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment"> * passed to the constructor does not hurt performance. The hash</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="comment"> * function used for the bloom filter and GCC&#39;s implementation of</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="comment"> * unordered_set are just the least significant bits of the id. This</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="comment"> * works fine for random ids or ids in sequences but will produce many</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="comment"> * hash collisions if lsb&#39;s are always the same */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="structfaiss_1_1IDSelectorBatch.html">   78</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IDSelectorBatch.html">IDSelectorBatch</a>: <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> {</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;    std::unordered_set&lt;idx_t&gt; set;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> uint8_t;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    std::vector&lt;uint8_t&gt; bloom; <span class="comment">// assumes low bits of id are a good hash value</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <span class="keywordtype">int</span> nbits;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    idx_t mask;</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;    <a class="code" href="structfaiss_1_1IDSelectorBatch.html">IDSelectorBatch</a> (<span class="keywordtype">long</span> n, <span class="keyword">const</span> idx_t *indices);</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    <span class="keywordtype">bool</span> is_member(idx_t <span class="keywordtype">id</span>) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    ~<a class="code" href="structfaiss_1_1IDSelectorBatch.html">IDSelectorBatch</a>()<span class="keyword"> override </span>{}</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;};</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="comment">// Below are structures used only by Index implementations</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="comment">/** List of temporary buffers used to store results before they are</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="comment"> *  copied to the RangeSearchResult object. */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="structfaiss_1_1BufferList.html">   99</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1BufferList.html">BufferList</a> {</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="comment">// buffer sizes in # entries</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    <span class="keywordtype">size_t</span> buffer_size;</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"><a class="line" href="structfaiss_1_1BufferList_1_1Buffer.html">  105</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structfaiss_1_1BufferList_1_1Buffer.html">Buffer</a> {</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        idx_t *ids;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <span class="keywordtype">float</span> *dis;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    };</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    std::vector&lt;Buffer&gt; buffers;</div>
<div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">  111</a></span>&#160;    <span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">wp</a>; <span class="comment">///&lt; write pointer in the last buffer.</span></div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1BufferList.html">BufferList</a> (<span class="keywordtype">size_t</span> buffer_size);</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    ~<a class="code" href="structfaiss_1_1BufferList.html">BufferList</a> ();</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="comment">// create a new buffer</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keywordtype">void</span> append_buffer ();</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> add (idx_t <span class="keywordtype">id</span>, <span class="keywordtype">float</span> dis)</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;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">wp</a> == buffer_size) { <span class="comment">// need new buffer</span></div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            append_buffer();</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;        Buffer &amp; buf = buffers.back();</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        buf.ids [<a class="code" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">wp</a>] = id;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        buf.dis [<a class="code" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">wp</a>] = dis;</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        <a class="code" href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">wp</a>++;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    }</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="comment">    /// copy elemnts ofs:ofs+n-1 seen as linear data in the buffers to</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="comment">    /// tables dest_ids, dest_dis</span></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;<span class="comment"></span>    <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1BufferList.html#a78b70417a9ba5b27553b3134f1190958">copy_range</a> (<span class="keywordtype">size_t</span> ofs, <span class="keywordtype">size_t</span> n,</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;                     idx_t * dest_ids, <span class="keywordtype">float</span> *dest_dis);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;};</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="comment">/// the entries in the buffers are split per query</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchPartialResult.html">  141</a></span>&#160;<span class="comment"></span><span class="keyword">struct </span><a class="code" href="structfaiss_1_1RangeSearchPartialResult.html">RangeSearchPartialResult</a>: <a class="code" href="structfaiss_1_1BufferList.html">BufferList</a> {</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> * res;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html">RangeSearchPartialResult</a> (<a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> * res_in);</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="comment">    /// result structure for a single query</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"><a class="line" href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">  147</a></span>&#160;<span class="comment"></span>    <span class="keyword">struct </span><a class="code" href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">QueryResult</a> {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;        idx_t qno;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        <span class="keywordtype">size_t</span> nres;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html">RangeSearchPartialResult</a> * pres;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> add (<span class="keywordtype">float</span> dis, idx_t <span class="keywordtype">id</span>) {</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;            nres++;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;            pres-&gt;add (<span class="keywordtype">id</span>, dis);</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        }</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    };</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    std::vector&lt;QueryResult&gt; queries;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="comment">    /// begin a new result</span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;<span class="comment"></span>    <a class="code" href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">QueryResult</a> &amp; <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html#a954c26beebb561a6c2b0f399c48a9db3">new_result</a> (idx_t qno);</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <span class="keywordtype">void</span> finalize ();</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="comment">    /// called by range_search before do_allocation</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="comment"></span>    <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html#ab6a385008493c7b630e4e7bc56e3da74">set_lims</a> ();</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;<span class="comment">    /// called by range_search after do_allocation</span></div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;<span class="comment"></span>    <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html#aa6639358995ac081f8a931a7790d0caf">set_result</a> (<span class="keywordtype">bool</span> incremental = <span class="keyword">false</span>);</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;};</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;<span class="comment">/***********************************************************</span></div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;<span class="comment"> * Abstract I/O objects</span></div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;<span class="comment"> ***********************************************************/</span></div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno"><a class="line" href="structfaiss_1_1IOReader.html">  177</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IOReader.html">IOReader</a> {</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    <span class="comment">// name that can be used in error messages</span></div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    std::string name;</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <span class="comment">// fread</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> operator()(</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;         <span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size, <span class="keywordtype">size_t</span> nitems) = 0;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    <span class="comment">// return a file number that can be memory-mapped</span></div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    <span class="keyword">virtual</span> <span class="keywordtype">int</span> fileno ();</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    <span class="keyword">virtual</span> ~<a class="code" href="structfaiss_1_1IOReader.html">IOReader</a>() {}</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;};</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div>
<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="structfaiss_1_1IOWriter.html">  191</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IOWriter.html">IOWriter</a> {</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    <span class="comment">// name that can be used in error messages</span></div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;    std::string name;</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;    <span class="comment">// fwrite</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;    <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> operator()(</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;         <span class="keyword">const</span> <span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size, <span class="keywordtype">size_t</span> nitems) = 0;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;    <span class="comment">// return a file number that can be memory-mapped</span></div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;    <span class="keyword">virtual</span> <span class="keywordtype">int</span> fileno ();</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    <span class="keyword">virtual</span> ~<a class="code" href="structfaiss_1_1IOWriter.html">IOWriter</a>() {}</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;};</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno"><a class="line" href="structfaiss_1_1VectorIOReader.html">  206</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1VectorIOReader.html">VectorIOReader</a>:<a class="code" href="structfaiss_1_1IOReader.html">IOReader</a> {</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    std::vector&lt;uint8_t&gt; data;</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    <span class="keywordtype">size_t</span> rp = 0;</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    <span class="keywordtype">size_t</span> operator()(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size, <span class="keywordtype">size_t</span> nitems) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;};</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div>
<div class="line"><a name="l00212"></a><span class="lineno"><a class="line" href="structfaiss_1_1VectorIOWriter.html">  212</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1VectorIOWriter.html">VectorIOWriter</a>:<a class="code" href="structfaiss_1_1IOWriter.html">IOWriter</a> {</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;    std::vector&lt;uint8_t&gt; data;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    <span class="keywordtype">size_t</span> operator()(<span class="keyword">const</span> <span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size, <span class="keywordtype">size_t</span> nitems) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;};</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;}; <span class="comment">// namespace faiss</span></div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="structfaiss_1_1IDSelectorBatch_html"><div class="ttname"><a href="structfaiss_1_1IDSelectorBatch.html">faiss::IDSelectorBatch</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00078">AuxIndexStructures.h:78</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a29269b98c33af874d379ca4f62408b90"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a29269b98c33af874d379ca4f62408b90">faiss::RangeSearchResult::nq</a></div><div class="ttdeci">size_t nq</div><div class="ttdoc">nb of queries </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00032">AuxIndexStructures.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">faiss::RangeSearchPartialResult::QueryResult</a></div><div class="ttdoc">result structure for a single query </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00147">AuxIndexStructures.h:147</a></div></div>
<div class="ttc" id="structfaiss_1_1BufferList_html_a78b70417a9ba5b27553b3134f1190958"><div class="ttname"><a href="structfaiss_1_1BufferList.html#a78b70417a9ba5b27553b3134f1190958">faiss::BufferList::copy_range</a></div><div class="ttdeci">void copy_range(size_t ofs, size_t n, idx_t *dest_ids, float *dest_dis)</div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00086">AuxIndexStructures.cpp:86</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00054">AuxIndexStructures.h:54</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html_aa6639358995ac081f8a931a7790d0caf"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html#aa6639358995ac081f8a931a7790d0caf">faiss::RangeSearchPartialResult::set_result</a></div><div class="ttdeci">void set_result(bool incremental=false)</div><div class="ttdoc">called by range_search after do_allocation </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00149">AuxIndexStructures.cpp:149</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html_ab6a385008493c7b630e4e7bc56e3da74"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html#ab6a385008493c7b630e4e7bc56e3da74">faiss::RangeSearchPartialResult::set_lims</a></div><div class="ttdeci">void set_lims()</div><div class="ttdoc">called by range_search before do_allocation </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00140">AuxIndexStructures.cpp:140</a></div></div>
<div class="ttc" id="structfaiss_1_1VectorIOReader_html"><div class="ttname"><a href="structfaiss_1_1VectorIOReader.html">faiss::VectorIOReader</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00206">AuxIndexStructures.h:206</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a56dca2b151bcf16f5d488aff321b9501"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a56dca2b151bcf16f5d488aff321b9501">faiss::RangeSearchResult::RangeSearchResult</a></div><div class="ttdeci">RangeSearchResult(idx_t nq, bool alloc_lims=true)</div><div class="ttdoc">lims must be allocated on input to range_search. </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00024">AuxIndexStructures.cpp:24</a></div></div>
<div class="ttc" id="structfaiss_1_1BufferList_html_af4d7ddcd77f328a12a7da89d8febe5d9"><div class="ttname"><a href="structfaiss_1_1BufferList.html#af4d7ddcd77f328a12a7da89d8febe5d9">faiss::BufferList::wp</a></div><div class="ttdeci">size_t wp</div><div class="ttdoc">write pointer in the last buffer. </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00111">AuxIndexStructures.h:111</a></div></div>
<div class="ttc" id="structfaiss_1_1VectorIOWriter_html"><div class="ttname"><a href="structfaiss_1_1VectorIOWriter.html">faiss::VectorIOWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00212">AuxIndexStructures.h:212</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a944a93aecc7b51d8f9f35444280aa919"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a944a93aecc7b51d8f9f35444280aa919">faiss::RangeSearchResult::distances</a></div><div class="ttdeci">float * distances</div><div class="ttdoc">corresponding distances (not sorted) </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00038">AuxIndexStructures.h:38</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelectorRange_html"><div class="ttname"><a href="structfaiss_1_1IDSelectorRange.html">faiss::IDSelectorRange</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00063">AuxIndexStructures.h:63</a></div></div>
<div class="ttc" id="structfaiss_1_1IOReader_html"><div class="ttname"><a href="structfaiss_1_1IOReader.html">faiss::IOReader</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00177">AuxIndexStructures.h:177</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html_a954c26beebb561a6c2b0f399c48a9db3"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html#a954c26beebb561a6c2b0f399c48a9db3">faiss::RangeSearchPartialResult::new_result</a></div><div class="ttdeci">QueryResult &amp; new_result(idx_t qno)</div><div class="ttdoc">begin a new result </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00118">AuxIndexStructures.cpp:118</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a34c4ba599c0cec45972af19e1f98f22a"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a34c4ba599c0cec45972af19e1f98f22a">faiss::RangeSearchResult::do_allocation</a></div><div class="ttdeci">virtual void do_allocation()</div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00038">AuxIndexStructures.cpp:38</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html">faiss::RangeSearchPartialResult</a></div><div class="ttdoc">the entries in the buffers are split per query </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00141">AuxIndexStructures.h:141</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html">faiss::RangeSearchResult</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00031">AuxIndexStructures.h:31</a></div></div>
<div class="ttc" id="structfaiss_1_1BufferList_1_1Buffer_html"><div class="ttname"><a href="structfaiss_1_1BufferList_1_1Buffer.html">faiss::BufferList::Buffer</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00105">AuxIndexStructures.h:105</a></div></div>
<div class="ttc" id="structfaiss_1_1IOWriter_html"><div class="ttname"><a href="structfaiss_1_1IOWriter.html">faiss::IOWriter</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00191">AuxIndexStructures.h:191</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_a39342ad2e9ad8b90f6e95dafd3287f49"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#a39342ad2e9ad8b90f6e95dafd3287f49">faiss::RangeSearchResult::buffer_size</a></div><div class="ttdeci">size_t buffer_size</div><div class="ttdoc">size of the result buffers used </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00040">AuxIndexStructures.h:40</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_aef57f9db99ca470c01bcdce0366cb6ff"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#aef57f9db99ca470c01bcdce0366cb6ff">faiss::RangeSearchResult::lims</a></div><div class="ttdeci">size_t * lims</div><div class="ttdoc">size (nq + 1) </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00033">AuxIndexStructures.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1BufferList_html"><div class="ttname"><a href="structfaiss_1_1BufferList.html">faiss::BufferList</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00099">AuxIndexStructures.h:99</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html_aa8ff848474a4cc16c5464cc4ec187824"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html#aa8ff848474a4cc16c5464cc4ec187824">faiss::RangeSearchResult::labels</a></div><div class="ttdeci">idx_t * labels</div><div class="ttdoc">result for query i is labels[lims[i]:lims[i+1]] </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00037">AuxIndexStructures.h:37</a></div></div>
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