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<div class="title">/data/users/matthijs/github_faiss/faiss/IndexFlat.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <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> <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> <span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "IndexFlat.h"</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <cstring></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "utils.h"</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "Heap.h"</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "FaissAssert.h"</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "AuxIndexStructures.h"</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> IndexFlat::IndexFlat (idx_t d, <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric):</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  Index(d, metric)</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#a406f028c702edec72477eacc5733f59c"> 30</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#a406f028c702edec72477eacc5733f59c">IndexFlat::add</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x) {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.insert(<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.end(), x, x + n * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += n;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> }</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#ab63dc34ef5d33f98f94aa0ade7c7324f"> 36</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#ab63dc34ef5d33f98f94aa0ade7c7324f">IndexFlat::reset</a>() {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.clear();</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> }</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#a85510d70f4675197df9988651e4692c9"> 42</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#a85510d70f4675197df9988651e4692c9">IndexFlat::search</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// we see the distances and labels as heaps</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="structfaiss_1_1HeapArray.html">float_minheap_array_t</a> res = {</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  size_t(n), size_t(k), labels, distances};</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="namespacefaiss.html#a880c7318971f866267a86945aaa61b17">knn_inner_product</a> (x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, &res);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2) {</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> res = {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  size_t(n), size_t(k), labels, distances};</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="namespacefaiss.html#a2f803e3d3b07cfab63699c89de161237">knn_L2sqr</a> (x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, &res);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#ac56b7ed90ab65fab9c586a1e56006d12"> 58</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#ac56b7ed90ab65fab9c586a1e56006d12">IndexFlat::range_search</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> radius,</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> *result)<span class="keyword"> const</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">switch</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a>) {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">case</span> METRIC_INNER_PRODUCT:</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="namespacefaiss.html#ab29d725b808df6f142b80f21aa45e507">range_search_inner_product</a> (x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>,</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  radius, result);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">case</span> METRIC_L2:</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="namespacefaiss.html#a1faa7bd079c9b1addf3058ddf882a000">range_search_L2sqr</a> (x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, radius, result);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#a14b51786e7f98be1954eef35d02813a7"> 73</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#a14b51786e7f98be1954eef35d02813a7">IndexFlat::compute_distance_subset</a> (</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n,</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *x,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordtype">float</span> *distances,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">switch</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a>) {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">case</span> METRIC_INNER_PRODUCT:</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  fvec_inner_products_by_idx (</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  distances,</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), labels, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, k);</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">case</span> METRIC_L2:</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  fvec_L2sqr_by_idx (</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  distances,</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), labels, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, k);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#a8d1ea1d28e80849f8b0f5493679d68c9"> 95</a></span> <span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexFlat.html#a8d1ea1d28e80849f8b0f5493679d68c9">IndexFlat::remove_ids</a> (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> & sel)</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> j = 0;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = 0; i < <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>; i++) {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (sel.is_member (i)) {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="comment">// should be removed</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (i > j) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  memmove (&<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * j], &<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> * i], <span class="keyword">sizeof</span>(<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[0]) * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  }</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  j++;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">long</span> nremove = ntotal - j;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">if</span> (nremove > 0) {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  ntotal = j;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.resize (ntotal * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> nremove;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat.html#ae4b33315752b62cff1626f9f967167b1"> 118</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat.html#ae4b33315752b62cff1626f9f967167b1">IndexFlat::reconstruct</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key, <span class="keywordtype">float</span> * recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  memcpy (recons, &(<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[key * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>]), <span class="keyword">sizeof</span>(*recons) * d);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> }</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">/***************************************************</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * IndexFlatL2BaseShift</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> ***************************************************/</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> IndexFlatL2BaseShift::IndexFlatL2BaseShift (idx_t d, <span class="keywordtype">size_t</span> nshift, <span class="keyword">const</span> <span class="keywordtype">float</span> *shift):</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <a class="code" href="structfaiss_1_1IndexFlatL2.html">IndexFlatL2</a> (d), shift (nshift)</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  memcpy (this->shift.data(), shift, <span class="keyword">sizeof</span>(float) * nshift);</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> }</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlatL2BaseShift.html#a16e9bf1aec9d18b3ebbe78fea6bfecc0"> 133</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlatL2BaseShift.html#a16e9bf1aec9d18b3ebbe78fea6bfecc0">IndexFlatL2BaseShift::search</a> (</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n,</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *x,</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">float</span> *distances,</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  FAISS_THROW_IF_NOT (shift.size() == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> res = {</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  size_t(n), size_t(k), labels, distances};</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="namespacefaiss.html#a5eb1701e46123827966f2a56da893d1d">knn_L2sqr_base_shift</a> (x, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, n, <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, &res, shift.data());</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">/***************************************************</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> * IndexRefineFlat</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> ***************************************************/</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> IndexRefineFlat::IndexRefineFlat (<a class="code" href="structfaiss_1_1Index.html">Index</a> *base_index):</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="structfaiss_1_1Index.html">Index</a> (base_index->d, base_index->metric_type),</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  refine_index (base_index->d, base_index->metric_type),</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  base_index (base_index), own_fields (false),</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  k_factor (1)</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = base_index-><a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  FAISS_THROW_IF_NOT_MSG (base_index-><a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == 0,</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="stringliteral">"base_index should be empty in the beginning"</span>);</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> IndexRefineFlat::IndexRefineFlat () {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a> = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#aaf0f6a094de0e9409effa81bedb9c7e2">own_fields</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a7383fabb28db5b0df45ca4ea81f7acd4">k_factor</a> = 1;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> }</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div>
<div class="line"><a name="l00171"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexRefineFlat.html#a79c4c9b9ffabc4460ef4def6eb962e68"> 171</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a79c4c9b9ffabc4460ef4def6eb962e68">IndexRefineFlat::train</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a>-><a class="code" href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">train</a> (n, x);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> }</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div>
<div class="line"><a name="l00177"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexRefineFlat.html#a10d5009c838e8653fd767ca48a3e6fcc"> 177</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a10d5009c838e8653fd767ca48a3e6fcc">IndexRefineFlat::add</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x) {</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a>-><a class="code" href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">add</a> (n, x);</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">refine_index</a>.<a class="code" href="structfaiss_1_1IndexFlat.html#a406f028c702edec72477eacc5733f59c">add</a> (n, x);</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = <a class="code" href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">refine_index</a>.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> }</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div>
<div class="line"><a name="l00184"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexRefineFlat.html#ac3efe902315768afe83fa2b8ea5dc591"> 184</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html#ac3efe902315768afe83fa2b8ea5dc591">IndexRefineFlat::reset</a> ()</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a>-><a class="code" href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">reset</a> ();</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">refine_index</a>.<a class="code" href="structfaiss_1_1IndexFlat.html#ab63dc34ef5d33f98f94aa0ade7c7324f">reset</a> ();</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> }</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a> idx_t;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">template</span><<span class="keyword">class</span> C></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keyword">static</span> <span class="keywordtype">void</span> reorder_2_heaps (</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  idx_t n,</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  idx_t k, idx_t *labels, <span class="keywordtype">float</span> *distances,</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  idx_t k_base, <span class="keyword">const</span> idx_t *base_labels, <span class="keyword">const</span> <span class="keywordtype">float</span> *base_distances)</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> {</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (idx_t i = 0; i < n; i++) {</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  idx_t *idxo = labels + i * k;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">float</span> *diso = distances + i * k;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keyword">const</span> idx_t *idxi = base_labels + i * k_base;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *disi = base_distances + i * k_base;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  heap_heapify<C> (k, diso, idxo, disi, idxi, k);</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">if</span> (k_base != k) { <span class="comment">// add remaining elements</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  heap_addn<C> (k, diso, idxo, disi + k, idxi + k, k_base - k);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  heap_reorder<C> (k, diso, idxo);</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  }</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> }</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
<div class="line"><a name="l00219"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexRefineFlat.html#ad04444de1e2c26c463cc52f3c076dd41"> 219</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html#ad04444de1e2c26c463cc52f3c076dd41">IndexRefineFlat::search</a> (</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  idx_t n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, idx_t k,</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordtype">float</span> *distances, idx_t *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  FAISS_THROW_IF_NOT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  idx_t k_base = <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> (k * <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a7383fabb28db5b0df45ca4ea81f7acd4">k_factor</a>);</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  idx_t * base_labels = labels;</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordtype">float</span> * base_distances = distances;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<idx_t></a> del1;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter<float></a> del2;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> </div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">if</span> (k != k_base) {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  base_labels = <span class="keyword">new</span> idx_t [n * k_base];</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  del1.set (base_labels);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  base_distances = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * k_base];</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  del2.set (base_distances);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  }</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a>-><a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a> (n, x, k_base, base_distances, base_labels);</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n * k_base; i++)</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  assert (base_labels[i] >= -1 &&</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  base_labels[i] < <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// compute refined distances</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <a class="code" href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">refine_index</a>.<a class="code" href="structfaiss_1_1IndexFlat.html#a14b51786e7f98be1954eef35d02813a7">compute_distance_subset</a> (</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  n, x, k_base, base_distances, base_labels);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// sort and store result</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2) {</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1CMax.html">CMax <float, idx_t></a> C;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  reorder_2_heaps<C> (</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  n, k, labels, distances,</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  k_base, base_labels, base_distances);</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">typedef</span> <a class="code" href="structfaiss_1_1CMin.html">CMin <float, idx_t></a> C;</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  reorder_2_heaps<C> (</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  n, k, labels, distances,</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  k_base, base_labels, base_distances);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> IndexRefineFlat::~IndexRefineFlat ()</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexRefineFlat.html#aaf0f6a094de0e9409effa81bedb9c7e2">own_fields</a>) <span class="keyword">delete</span> <a class="code" href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">base_index</a>;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> }</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">/***************************************************</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"> * IndexFlat1D</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment"> ***************************************************/</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> IndexFlat1D::IndexFlat1D (<span class="keywordtype">bool</span> continuous_update):</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  IndexFlatL2 (1),</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  continuous_update (continuous_update)</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> {</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> }</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"></span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment">/// if not continuous_update, call this between the last add and</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment">/// the first search</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat1D.html#ac7466c6c9b1e9e81ea19b846ddb8209e"> 284</a></span> <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat1D.html#ac7466c6c9b1e9e81ea19b846ddb8209e">IndexFlat1D::update_permutation</a> ()</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>.resize (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> < 1000000) {</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  fvec_argsort (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), (<span class="keywordtype">size_t</span>*)<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>.data());</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  fvec_argsort_parallel (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>.data(), (<span class="keywordtype">size_t</span>*)<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>.data());</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div>
<div class="line"><a name="l00294"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat1D.html#a5dc39280262484ecadda5e11162c2457"> 294</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat1D.html#a5dc39280262484ecadda5e11162c2457">IndexFlat1D::add</a> (idx_t n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> {</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <a class="code" href="structfaiss_1_1IndexFlat.html#a406f028c702edec72477eacc5733f59c">IndexFlatL2::add</a> (n, x);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexFlat1D.html#a8b025a468b088a343cf8079006de45e2">continuous_update</a>)</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <a class="code" href="structfaiss_1_1IndexFlat1D.html#ac7466c6c9b1e9e81ea19b846ddb8209e">update_permutation</a>();</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat1D.html#aa205c4ffa6cbd50f49ef9cb6cc050000"> 301</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat1D.html#aa205c4ffa6cbd50f49ef9cb6cc050000">IndexFlat1D::reset</a>()</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="structfaiss_1_1IndexFlat.html#ab63dc34ef5d33f98f94aa0ade7c7324f">IndexFlatL2::reset</a>();</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>.clear();</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div>
<div class="line"><a name="l00307"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexFlat1D.html#a65736f2900865cd156faba4fcd260d05"> 307</a></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexFlat1D.html#a65736f2900865cd156faba4fcd260d05">IndexFlat1D::search</a> (</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  idx_t n,</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keyword">const</span> <span class="keywordtype">float</span> *x,</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  idx_t k,</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordtype">float</span> *distances,</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  idx_t *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  FAISS_THROW_IF_NOT_MSG (<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>.size() == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>,</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="stringliteral">"Call update_permutation before search"</span>);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="preprocessor"></span> <span class="keywordflow">for</span> (idx_t i = 0; i < n; i++) {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordtype">float</span> q = x[i]; <span class="comment">// query</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordtype">float</span> *D = distances + i * k;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  idx_t *I = labels + i * k;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">// binary search</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  idx_t i0 = 0, i1 = <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  idx_t wp = 0;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i0]] > q) {</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  i1 = 0;</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">goto</span> finish_right;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  }</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i1 - 1]] <= q) {</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  i0 = i1 - 1;</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">goto</span> finish_left;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">while</span> (i0 + 1 < i1) {</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  idx_t imed = (i0 + i1) / 2;</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[imed]] <= q) i0 = imed;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">else</span> i1 = imed;</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="comment">// query is between xb[perm[i0]] and xb[perm[i1]]</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="comment">// expand to nearest neighs</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">while</span> (wp < k) {</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordtype">float</span> xleft = <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i0]];</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordtype">float</span> xright = <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[perm[i1]];</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (q - xleft < xright - q) {</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  D[wp] = q - xleft;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  I[wp] = perm[i0];</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  i0--; wp++;</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">if</span> (i0 < 0) { <span class="keywordflow">goto</span> finish_right; }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  D[wp] = xright - q;</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  I[wp] = perm[i1];</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  i1++; wp++;</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (i1 >= <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>) { <span class="keywordflow">goto</span> finish_left; }</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  }</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  }</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  finish_right:</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="comment">// grow to the right from i1</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordflow">while</span> (wp < k) {</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">if</span> (i1 < <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>) {</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  D[wp] = <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i1]] - q;</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  I[wp] = <a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i1];</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  i1++;</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  D[wp] = 1.0 / 0.0;</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  I[wp] = -1;</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  wp++;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">goto</span> done;</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  finish_left:</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="comment">// grow to the left from i0</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">while</span> (wp < k) {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">if</span> (i0 >= 0) {</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  D[wp] = q - <a class="code" href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">xb</a>[<a class="code" href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">perm</a>[i0]];</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  I[wp] = perm[i0];</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  i0--;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  D[wp] = 1.0 / 0.0;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  I[wp] = -1;</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  wp++;</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  }</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  done: ;</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  }</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> }</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> </div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> } <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="namespacefaiss_html_a5eb1701e46123827966f2a56da893d1d"><div class="ttname"><a href="namespacefaiss.html#a5eb1701e46123827966f2a56da893d1d">faiss::knn_L2sqr_base_shift</a></div><div class="ttdeci">void knn_L2sqr_base_shift(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_maxheap_array_t *res, const float *base_shift)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00988">utils.cpp:988</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlatL2BaseShift_html_a16e9bf1aec9d18b3ebbe78fea6bfecc0"><div class="ttname"><a href="structfaiss_1_1IndexFlatL2BaseShift.html#a16e9bf1aec9d18b3ebbe78fea6bfecc0">faiss::IndexFlatL2BaseShift::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00133">IndexFlat.cpp:133</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_ac3efe902315768afe83fa2b8ea5dc591"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#ac3efe902315768afe83fa2b8ea5dc591">faiss::IndexRefineFlat::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00184">IndexFlat.cpp:184</a></div></div>
<div class="ttc" id="structfaiss_1_1CMax_html"><div class="ttname"><a href="structfaiss_1_1CMax.html">faiss::CMax</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00048">Heap.h:48</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a849361f5f0ab0aba8d419c86f2594191"><div class="ttname"><a href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">faiss::Index::reset</a></div><div class="ttdeci">virtual void reset()=0</div><div class="ttdoc">removes all elements from the database. </div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_a8b025a468b088a343cf8079006de45e2"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#a8b025a468b088a343cf8079006de45e2">faiss::IndexFlat1D::continuous_update</a></div><div class="ttdeci">bool continuous_update</div><div class="ttdoc">is the permutation updated continuously? </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00139">IndexFlat.h:139</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#l00052">AuxIndexStructures.h:52</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlatL2_html"><div class="ttname"><a href="structfaiss_1_1IndexFlatL2.html">faiss::IndexFlatL2</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00079">IndexFlat.h:79</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a85510d70f4675197df9988651e4692c9"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a85510d70f4675197df9988651e4692c9">faiss::IndexFlat::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00042">IndexFlat.cpp:42</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_ab63dc34ef5d33f98f94aa0ade7c7324f"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#ab63dc34ef5d33f98f94aa0ade7c7324f">faiss::IndexFlat::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00036">IndexFlat.cpp:36</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_ac7466c6c9b1e9e81ea19b846ddb8209e"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#ac7466c6c9b1e9e81ea19b846ddb8209e">faiss::IndexFlat1D::update_permutation</a></div><div class="ttdeci">void update_permutation()</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00284">IndexFlat.cpp:284</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_abf601502bdbfa02b9d7bcd7b3671b71d"><div class="ttname"><a href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">faiss::Index::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00023">Index.cpp:23</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_ae4b33315752b62cff1626f9f967167b1"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#ae4b33315752b62cff1626f9f967167b1">faiss::IndexFlat::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00118">IndexFlat.cpp:118</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_a5dc39280262484ecadda5e11162c2457"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#a5dc39280262484ecadda5e11162c2457">faiss::IndexFlat1D::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00294">IndexFlat.cpp:294</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a8d1ea1d28e80849f8b0f5493679d68c9"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a8d1ea1d28e80849f8b0f5493679d68c9">faiss::IndexFlat::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &sel) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00095">IndexFlat.cpp:95</a></div></div>
<div class="ttc" id="structfaiss_1_1ScopeDeleter_html"><div class="ttname"><a href="structfaiss_1_1ScopeDeleter.html">faiss::ScopeDeleter</a></div><div class="ttdef"><b>Definition:</b> <a href="FaissException_8h_source.html#l00039">FaissException.h:39</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_ad04444de1e2c26c463cc52f3c076dd41"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#ad04444de1e2c26c463cc52f3c076dd41">faiss::IndexRefineFlat::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00219">IndexFlat.cpp:219</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a4acc0b3a8c33e5dd8851448ac162dfd0"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a4acc0b3a8c33e5dd8851448ac162dfd0">faiss::IndexRefineFlat::base_index</a></div><div class="ttdeci">Index * base_index</div><div class="ttdoc">faster index to pre-select the vectors that should be filtered </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00109">IndexFlat.h:109</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_aab99f32713ece942ccefccf306292ca0"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#aab99f32713ece942ccefccf306292ca0">faiss::IndexRefineFlat::refine_index</a></div><div class="ttdeci">IndexFlat refine_index</div><div class="ttdoc">storage for full vectors </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00106">IndexFlat.h:106</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_aaf0f6a094de0e9409effa81bedb9c7e2"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#aaf0f6a094de0e9409effa81bedb9c7e2">faiss::IndexRefineFlat::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">should the base index be deallocated? </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00110">IndexFlat.h:110</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </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_1IndexFlat_html_ac56b7ed90ab65fab9c586a1e56006d12"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#ac56b7ed90ab65fab9c586a1e56006d12">faiss::IndexFlat::range_search</a></div><div class="ttdeci">void range_search(idx_t n, const float *x, float radius, RangeSearchResult *result) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00058">IndexFlat.cpp:58</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a79c4c9b9ffabc4460ef4def6eb962e68"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a79c4c9b9ffabc4460ef4def6eb962e68">faiss::IndexRefineFlat::train</a></div><div class="ttdeci">void train(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00171">IndexFlat.cpp:171</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a1b5e9ac70adbce0897dd6c8276ad96f2"><div class="ttname"><a href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">faiss::Index::add</a></div><div class="ttdeci">virtual void add(idx_t n, const float *x)=0</div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html"><div class="ttname"><a href="structfaiss_1_1HeapArray.html">faiss::HeapArray</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00350">Heap.h:350</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#l00062">Index.h:62</a></div></div>
<div class="ttc" id="namespacefaiss_html_ab29d725b808df6f142b80f21aa45e507"><div class="ttname"><a href="namespacefaiss.html#ab29d725b808df6f142b80f21aa45e507">faiss::range_search_inner_product</a></div><div class="ttdeci">void range_search_inner_product(const float *x, const float *y, size_t d, size_t nx, size_t ny, float radius, RangeSearchResult *res)</div><div class="ttdoc">same as range_search_L2sqr for the inner product similarity </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01282">utils.cpp:1282</a></div></div>
<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#l00065">Index.h:65</a></div></div>
<div class="ttc" id="namespacefaiss_html_a880c7318971f866267a86945aaa61b17"><div class="ttname"><a href="namespacefaiss.html#a880c7318971f866267a86945aaa61b17">faiss::knn_inner_product</a></div><div class="ttdeci">void knn_inner_product(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_minheap_array_t *res)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00948">utils.cpp:948</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a406f028c702edec72477eacc5733f59c"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a406f028c702edec72477eacc5733f59c">faiss::IndexFlat::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00030">IndexFlat.cpp:30</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_a65736f2900865cd156faba4fcd260d05"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#a65736f2900865cd156faba4fcd260d05">faiss::IndexFlat1D::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdoc">Warn: the distances returned are L1 not L2. </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00307">IndexFlat.cpp:307</a></div></div>
<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>
<div class="ttc" id="namespacefaiss_html_a1faa7bd079c9b1addf3058ddf882a000"><div class="ttname"><a href="namespacefaiss.html#a1faa7bd079c9b1addf3058ddf882a000">faiss::range_search_L2sqr</a></div><div class="ttdeci">void range_search_L2sqr(const float *x, const float *y, size_t d, size_t nx, size_t ny, float radius, RangeSearchResult *res)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01267">utils.cpp:1267</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#l00029">AuxIndexStructures.h:29</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a14b51786e7f98be1954eef35d02813a7"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a14b51786e7f98be1954eef35d02813a7">faiss::IndexFlat::compute_distance_subset</a></div><div class="ttdeci">void compute_distance_subset(idx_t n, const float *x, idx_t k, float *distances, const idx_t *labels) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00073">IndexFlat.cpp:73</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00072">Index.h:72</a></div></div>
<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#l00060">Index.h:60</a></div></div>
<div class="ttc" id="namespacefaiss_html_a2f803e3d3b07cfab63699c89de161237"><div class="ttname"><a href="namespacefaiss.html#a2f803e3d3b07cfab63699c89de161237">faiss::knn_L2sqr</a></div><div class="ttdeci">void knn_L2sqr(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_maxheap_array_t *res)</div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00968">utils.cpp:968</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00069">Index.h:69</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat_html_a9001de47890fe5d2eced9551d3613d47"><div class="ttname"><a href="structfaiss_1_1IndexFlat.html#a9001de47890fe5d2eced9551d3613d47">faiss::IndexFlat::xb</a></div><div class="ttdeci">std::vector< float > xb</div><div class="ttdoc">database vectors, size ntotal * d </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00025">IndexFlat.h:25</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a7383fabb28db5b0df45ca4ea81f7acd4"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a7383fabb28db5b0df45ca4ea81f7acd4">faiss::IndexRefineFlat::k_factor</a></div><div class="ttdeci">float k_factor</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00114">IndexFlat.h:114</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_aa205c4ffa6cbd50f49ef9cb6cc050000"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#aa205c4ffa6cbd50f49ef9cb6cc050000">faiss::IndexFlat1D::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00301">IndexFlat.cpp:301</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlat1D_html_a3442f0d86a14108534f99eea0b7d4d3f"><div class="ttname"><a href="structfaiss_1_1IndexFlat1D.html#a3442f0d86a14108534f99eea0b7d4d3f">faiss::IndexFlat1D::perm</a></div><div class="ttdeci">std::vector< idx_t > perm</div><div class="ttdoc">sorted database indices </div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00141">IndexFlat.h:141</a></div></div>
<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product version and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00043">Index.h:43</a></div></div>
<div class="ttc" id="structfaiss_1_1CMin_html"><div class="ttname"><a href="structfaiss_1_1CMin.html">faiss::CMin</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00053">Heap.h:53</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexRefineFlat_html_a10d5009c838e8653fd767ca48a3e6fcc"><div class="ttname"><a href="structfaiss_1_1IndexRefineFlat.html#a10d5009c838e8653fd767ca48a3e6fcc">faiss::IndexRefineFlat::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8cpp_source.html#l00177">IndexFlat.cpp:177</a></div></div>
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