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<div class="title">/data/users/hoss/faiss/index_io.cpp</div> </div>
</div><!--header-->
<div class="contents">
<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) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "index_io.h"</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <cstdio></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <cstdlib></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <sys/mman.h></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <sys/types.h></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <sys/stat.h></span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <unistd.h></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "FaissAssert.h"</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "AuxIndexStructures.h"</span></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> <span class="preprocessor">#include "IndexFlat.h"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "VectorTransform.h"</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "IndexLSH.h"</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "IndexPQ.h"</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "IndexIVF.h"</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "IndexIVFPQ.h"</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "IndexIVFFlat.h"</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "IndexIVFSpectralHash.h"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "MetaIndexes.h"</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "IndexScalarQuantizer.h"</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "IndexHNSW.h"</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "OnDiskInvertedLists.h"</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "IndexBinaryFlat.h"</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "IndexBinaryFromFloat.h"</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "IndexBinaryHNSW.h"</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include "IndexBinaryIVF.h"</span></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"> 42</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * The I/O format is the content of the class. For objects that are</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * inherited, like Index, a 4-character-code (fourcc) indicates which</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * child class this is an instance of.</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * In this case, the fields of the parent class are written first,</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * then the ones for the child classes. Note that this requires</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * classes to be serialized to have a constructor without parameters,</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * so that the fields can be filled in later. The default constructor</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * should set reasonable defaults for all fields.</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * The fourccs are assigned arbitrarily. When the class changed (added</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * or deprecated fields), the fourcc can be replaced. New code should</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * be able to read the old fourcc and fill in new classes.</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * TODO: serialization to strings for use in Python pickle or Torch</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * serialization.</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * TODO: in this file, the read functions that encouter errors may</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * leak memory.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">static</span> uint32_t fourcc (<span class="keyword">const</span> <span class="keywordtype">char</span> sx[4]) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  assert(4 == strlen(sx));</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *x = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)sx;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> x[0] | x[1] << 8 | x[2] << 16 | x[3] << 24;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * I/O macros</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * we use macros so that we have a line number to report in abort</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * (). This makes debugging a lot easier. The IOReader or IOWriter is</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * always called f and thus is not passed in as a macro parameter.</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#define WRITEANDCHECK(ptr, n) { \</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor"> size_t ret = (*f)(ptr, sizeof(*(ptr)), n); \</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor"> FAISS_THROW_IF_NOT_FMT(ret == (n), \</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor"> "write error in %s: %ld != %ld (%s)", \</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"> f->name.c_str(), ret, size_t(n), strerror(errno)); \</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"> }</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#define READANDCHECK(ptr, n) { \</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"> size_t ret = (*f)(ptr, sizeof(*(ptr)), n); \</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor"> FAISS_THROW_IF_NOT_FMT(ret == (n), \</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor"> "read error in %s: %ld != %ld (%s)", \</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor"> f->name.c_str(), ret, size_t(n), strerror(errno)); \</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor"> }</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#define WRITE1(x) WRITEANDCHECK(&(x), 1)</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor"></span><span class="preprocessor">#define READ1(x) READANDCHECK(&(x), 1)</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#define WRITEVECTOR(vec) { \</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor"> size_t size = (vec).size (); \</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor"> WRITEANDCHECK (&size, 1); \</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor"> WRITEANDCHECK ((vec).data (), size); \</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor"> }</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment">// will fail if we write 256G of data at once...</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="preprocessor">#define READVECTOR(vec) { \</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor"> long size; \</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor"> READANDCHECK (&size, 1); \</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor"> FAISS_THROW_IF_NOT (size >= 0 && size < (1L << 40)); \</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor"> (vec).resize (size); \</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor"> READANDCHECK ((vec).data (), size); \</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor"> }</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="structfaiss_1_1ScopeFileCloser.html"> 115</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  FILE *f;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> (FILE *f): f (f) {}</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  ~<a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> () {fclose (f); }</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> };</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </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> <span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">struct </span>FileIOReader: <a class="code" href="structfaiss_1_1IOReader.html">IOReader</a> {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  FILE *f = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordtype">bool</span> need_close = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  FileIOReader(FILE *rf): f(rf) {}</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>  FileIOReader(<span class="keyword">const</span> <span class="keywordtype">char</span> * fname)</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>  name = fname;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  f = fopen(fname, <span class="stringliteral">"rb"</span>);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  FAISS_THROW_IF_NOT_FMT (</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  f, <span class="stringliteral">"could not open %s for reading: %s"</span>,</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  fname, strerror(errno));</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  need_close = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  ~FileIOReader()<span class="keyword"> override </span>{</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (need_close) {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordtype">int</span> ret = fclose(f);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (ret != 0) {<span class="comment">// we cannot raise and exception in the destructor</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  fprintf(stderr, <span class="stringliteral">"file %s close error: %s"</span>,</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  name.c_str(), strerror(errno));</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> </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">size_t</span> operator()(</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</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="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> fread(ptr, size, nitems, f);</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">int</span> fileno()<span class="keyword"> override </span>{</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  return ::fileno (f);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</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> };</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="keyword">struct </span>FileIOWriter: IOWriter {</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  FILE *f = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">bool</span> need_close = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  FileIOWriter(FILE *wf): f(wf) {}</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  FileIOWriter(<span class="keyword">const</span> <span class="keywordtype">char</span> * fname)</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>  name = fname;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  f = fopen(fname, <span class="stringliteral">"wb"</span>);</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  FAISS_THROW_IF_NOT_FMT (</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  f, <span class="stringliteral">"could not open %s for writing: %s"</span>,</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  fname, strerror(errno));</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  need_close = <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"> 177</span>  ~FileIOWriter()<span class="keyword"> override </span>{</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">if</span> (need_close) {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordtype">int</span> ret = fclose(f);</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">if</span> (ret != 0) {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// we cannot raise and exception in the destructor</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  fprintf(stderr, <span class="stringliteral">"file %s close error: %s"</span>,</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  name.c_str(), strerror(errno));</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</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>  }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordtype">size_t</span> operator()(</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <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="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span> fwrite(ptr, size, nitems, f);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordtype">int</span> fileno()<span class="keyword"> override </span>{</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  return ::fileno (f);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> };</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> } <span class="comment">// namespace</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> * Write</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">static</span> <span class="keywordtype">void</span> write_index_header (<span class="keyword">const</span> Index *idx, IOWriter *f) {</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  WRITE1 (idx->d);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  WRITE1 (idx->ntotal);</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> dummy = 1 << 20;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  WRITE1 (dummy);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  WRITE1 (dummy);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  WRITE1 (idx->is_trained);</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  WRITE1 (idx->metric_type);</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> <span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, IOWriter *f) {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (<span class="keyword">const</span> LinearTransform * lt =</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  dynamic_cast < const LinearTransform *> (vt)) {</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (dynamic_cast<const RandomRotationMatrix *>(lt)) {</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  uint32_t h = fourcc (<span class="stringliteral">"rrot"</span>);</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  WRITE1 (h);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> PCAMatrix * pca =</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  dynamic_cast<const PCAMatrix *>(lt)) {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  uint32_t h = fourcc (<span class="stringliteral">"PcAm"</span>);</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  WRITE1 (h);</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  WRITE1 (pca->eigen_power);</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  WRITE1 (pca->random_rotation);</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  WRITE1 (pca->balanced_bins);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  WRITEVECTOR (pca->mean);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  WRITEVECTOR (pca->eigenvalues);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  WRITEVECTOR (pca->PCAMat);</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="comment">// generic LinearTransform (includes OPQ)</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  uint32_t h = fourcc (<span class="stringliteral">"LTra"</span>);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  WRITE1 (h);</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  WRITE1 (lt->have_bias);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  WRITEVECTOR (lt->A);</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  WRITEVECTOR (lt->b);</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> RemapDimensionsTransform *rdt =</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  dynamic_cast<const RemapDimensionsTransform *>(vt)) {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  uint32_t h = fourcc (<span class="stringliteral">"RmDT"</span>);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  WRITE1 (h);</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  WRITEVECTOR (rdt->map);</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> NormalizationTransform *nt =</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  dynamic_cast<const NormalizationTransform *>(vt)) {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  uint32_t h = fourcc (<span class="stringliteral">"VNrm"</span>);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  WRITE1 (h);</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  WRITE1 (nt->norm);</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> CenteringTransform *ct =</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  dynamic_cast<const CenteringTransform *>(vt)) {</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  uint32_t h = fourcc (<span class="stringliteral">"VCnt"</span>);</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  WRITE1 (h);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  WRITEVECTOR (ct->mean);</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  FAISS_THROW_MSG (<span class="stringliteral">"cannot serialize this"</span>);</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  }</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="comment">// common fields</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  WRITE1 (vt->d_in);</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  WRITE1 (vt->d_out);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  WRITE1 (vt->is_trained);</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> <span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer *pq, IOWriter *f) {</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  WRITE1 (pq->d);</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  WRITE1 (pq->M);</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  WRITE1 (pq->nbits);</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  WRITEVECTOR (pq->centroids);</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> }</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> <span class="keyword">static</span> <span class="keywordtype">void</span> write_ScalarQuantizer (</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keyword">const</span> ScalarQuantizer *ivsc, IOWriter *f) {</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  WRITE1 (ivsc->qtype);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  WRITE1 (ivsc->rangestat);</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  WRITE1 (ivsc->rangestat_arg);</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  WRITE1 (ivsc->d);</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  WRITE1 (ivsc->code_size);</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  WRITEVECTOR (ivsc->trained);</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> }</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> <span class="keywordtype">void</span> write_InvertedLists (<span class="keyword">const</span> InvertedLists *ils, IOWriter *f) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">if</span> (ils == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  uint32_t h = fourcc (<span class="stringliteral">"il00"</span>);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  WRITE1 (h);</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> <span class="keyword">auto</span> & ails =</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  dynamic_cast<const ArrayInvertedLists *>(ils)) {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  uint32_t h = fourcc (<span class="stringliteral">"ilar"</span>);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  WRITE1 (h);</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  WRITE1 (ails->nlist);</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  WRITE1 (ails->code_size);</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// here we store either as a full or a sparse data buffer</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordtype">size_t</span> n_non0 = 0;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">if</span> (ails->ids[i].size() > 0)</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  n_non0++;</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>  <span class="keywordflow">if</span> (n_non0 > ails->nlist / 2) {</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  uint32_t list_type = fourcc(<span class="stringliteral">"full"</span>);</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  WRITE1 (list_type);</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  std::vector<size_t> sizes;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  sizes.push_back (ails->ids[i].size());</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>  WRITEVECTOR (sizes);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordtype">int</span> list_type = fourcc(<span class="stringliteral">"sprs"</span>); <span class="comment">// sparse</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  WRITE1 (list_type);</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  std::vector<size_t> sizes;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordtype">size_t</span> n = ails->ids[i].size();</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (n > 0) {</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  sizes.push_back (i);</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  sizes.push_back (n);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  WRITEVECTOR (sizes);</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="comment">// make a single contiguous data buffer (useful for mmapping)</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordtype">size_t</span> n = ails->ids[i].size();</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (n > 0) {</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  WRITEANDCHECK (ails->codes[i].data(), n * ails->code_size);</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  WRITEANDCHECK (ails->ids[i].data(), n);</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>  }</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> <span class="keyword">auto</span> & od =</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  dynamic_cast<const OnDiskInvertedLists *>(ils)) {</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  uint32_t h = fourcc (<span class="stringliteral">"ilod"</span>);</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  WRITE1 (h);</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  WRITE1 (ils->nlist);</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  WRITE1 (ils->code_size);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">// this is a POD object</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  WRITEVECTOR (od->lists);</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  {</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  std::vector<OnDiskInvertedLists::Slot> v(</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  od->slots.begin(), od->slots.end());</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  WRITEVECTOR(v);</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  {</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  std::vector<char> x(od->filename.begin(), od->filename.end());</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  WRITEVECTOR(x);</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>  WRITE1(od->totsize);</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  fprintf(stderr, <span class="stringliteral">"WARN! write_InvertedLists: unsupported invlist type, "</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="stringliteral">"saving null invlist\n"</span>);</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  uint32_t h = fourcc (<span class="stringliteral">"il00"</span>);</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  WRITE1 (h);</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> }</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer*pq, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  FileIOWriter writer(fname);</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  write_ProductQuantizer (pq, &writer);</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> }</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="keyword">static</span> <span class="keywordtype">void</span> write_HNSW (<span class="keyword">const</span> HNSW *hnsw, IOWriter *f) {</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> </div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  WRITEVECTOR (hnsw->assign_probas);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  WRITEVECTOR (hnsw->cum_nneighbor_per_level);</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  WRITEVECTOR (hnsw->levels);</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  WRITEVECTOR (hnsw->offsets);</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  WRITEVECTOR (hnsw->neighbors);</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  WRITE1 (hnsw->entry_point);</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  WRITE1 (hnsw->max_level);</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  WRITE1 (hnsw->efConstruction);</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  WRITE1 (hnsw->efSearch);</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  WRITE1 (hnsw->upper_beam);</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> }</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> </div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="keyword">static</span> <span class="keywordtype">void</span> write_ivf_header (<span class="keyword">const</span> IndexIVF *ivf, IOWriter *f) {</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  write_index_header (ivf, f);</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  WRITE1 (ivf->nlist);</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  WRITE1 (ivf->nprobe);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  write_index (ivf->quantizer, f);</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  WRITE1 (ivf->maintain_direct_map);</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  WRITEVECTOR (ivf->direct_map);</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> }</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, IOWriter *f) {</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexFlat * idxf = dynamic_cast<const IndexFlat *> (idx)) {</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  uint32_t h = fourcc (</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  idxf->metric_type == METRIC_INNER_PRODUCT ? <span class="stringliteral">"IxFI"</span> :</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  idxf->metric_type == METRIC_L2 ? <span class="stringliteral">"IxF2"</span> : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  WRITE1 (h);</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  write_index_header (idx, f);</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  WRITEVECTOR (idxf->xb);</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexLSH * idxl = dynamic_cast<const IndexLSH *> (idx)) {</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  uint32_t h = fourcc (<span class="stringliteral">"IxHe"</span>);</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  WRITE1 (h);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  write_index_header (idx, f);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  WRITE1 (idxl->nbits);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  WRITE1 (idxl->rotate_data);</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  WRITE1 (idxl->train_thresholds);</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  WRITEVECTOR (idxl->thresholds);</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  WRITE1 (idxl->bytes_per_vec);</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  write_VectorTransform (&idxl->rrot, f);</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  WRITEVECTOR (idxl->codes);</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPQ * idxp = dynamic_cast<const IndexPQ *> (idx)) {</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  uint32_t h = fourcc (<span class="stringliteral">"IxPq"</span>);</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  WRITE1 (h);</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  write_index_header (idx, f);</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  write_ProductQuantizer (&idxp->pq, f);</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  WRITEVECTOR (idxp->codes);</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="comment">// search params -- maybe not useful to store?</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  WRITE1 (idxp->search_type);</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  WRITE1 (idxp->encode_signs);</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  WRITE1 (idxp->polysemous_ht);</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> Index2Layer * idxp =</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  dynamic_cast<const Index2Layer *> (idx)) {</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  uint32_t h = fourcc (<span class="stringliteral">"Ix2L"</span>);</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  WRITE1 (h);</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  write_index_header (idx, f);</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  write_index (idxp->q1.quantizer, f);</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  WRITE1 (idxp->q1.nlist);</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  WRITE1 (idxp->q1.quantizer_trains_alone);</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  write_ProductQuantizer (&idxp->pq, f);</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  WRITE1 (idxp->code_size_1);</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  WRITE1 (idxp->code_size_2);</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  WRITE1 (idxp->code_size);</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  WRITEVECTOR (idxp->codes);</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexScalarQuantizer * idxs =</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  dynamic_cast<const IndexScalarQuantizer *> (idx)) {</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  uint32_t h = fourcc (<span class="stringliteral">"IxSQ"</span>);</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  WRITE1 (h);</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  write_index_header (idx, f);</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  write_ScalarQuantizer (&idxs->sq, f);</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  WRITEVECTOR (idxs->codes);</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFFlatDedup * ivfl =</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  dynamic_cast<const IndexIVFFlatDedup *> (idx)) {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  uint32_t h = fourcc (<span class="stringliteral">"IwFd"</span>);</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  WRITE1 (h);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  write_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  {</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  std::vector<Index::idx_t> tab (2 * ivfl->instances.size());</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordtype">long</span> i = 0;</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it = ivfl->instances.begin();</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  it != ivfl->instances.end(); ++it) {</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  tab[i++] = it->first;</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  tab[i++] = it->second;</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  WRITEVECTOR (tab);</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  }</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  write_InvertedLists (ivfl->invlists, f);</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFFlat * ivfl =</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  dynamic_cast<const IndexIVFFlat *> (idx)) {</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  uint32_t h = fourcc (<span class="stringliteral">"IwFl"</span>);</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  WRITE1 (h);</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  write_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  write_InvertedLists (ivfl->invlists, f);</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFScalarQuantizer * ivsc =</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  dynamic_cast<const IndexIVFScalarQuantizer *> (idx)) {</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  uint32_t h = fourcc (<span class="stringliteral">"IwSq"</span>);</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  WRITE1 (h);</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  write_ivf_header (ivsc, f);</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  write_ScalarQuantizer (&ivsc->sq, f);</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  WRITE1 (ivsc->code_size);</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  WRITE1 (ivsc->by_residual);</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  write_InvertedLists (ivsc->invlists, f);</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFSpectralHash *ivsp =</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  dynamic_cast<const IndexIVFSpectralHash *>(idx)) {</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  uint32_t h = fourcc (<span class="stringliteral">"IwSh"</span>);</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  WRITE1 (h);</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  write_ivf_header (ivsp, f);</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  write_VectorTransform (ivsp->vt, f);</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  WRITE1 (ivsp->nbit);</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  WRITE1 (ivsp->period);</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  WRITE1 (ivsp->threshold_type);</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  WRITEVECTOR (ivsp->trained);</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  write_InvertedLists (ivsp->invlists, f);</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFPQ * ivpq =</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  dynamic_cast<const IndexIVFPQ *> (idx)) {</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keyword">const</span> IndexIVFPQR * ivfpqr = <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexIVFPQR *<span class="keyword">></span> (idx);</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> </div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  uint32_t h = fourcc (ivfpqr ? <span class="stringliteral">"IwQR"</span> : <span class="stringliteral">"IwPQ"</span>);</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  WRITE1 (h);</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  write_ivf_header (ivpq, f);</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  WRITE1 (ivpq->by_residual);</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  WRITE1 (ivpq->code_size);</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  write_ProductQuantizer (&ivpq->pq, f);</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  write_InvertedLists (ivpq->invlists, f);</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  write_ProductQuantizer (&ivfpqr->refine_pq, f);</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  WRITEVECTOR (ivfpqr->refine_codes);</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  WRITE1 (ivfpqr->k_factor);</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  }</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> </div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPreTransform * ixpt =</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  dynamic_cast<const IndexPreTransform *> (idx)) {</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  uint32_t h = fourcc (<span class="stringliteral">"IxPT"</span>);</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  WRITE1 (h);</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  write_index_header (ixpt, f);</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keywordtype">int</span> nt = ixpt->chain.size();</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  WRITE1 (nt);</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < nt; i++)</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  write_VectorTransform (ixpt->chain[i], f);</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  write_index (ixpt->index, f);</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> MultiIndexQuantizer * imiq =</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  dynamic_cast<const MultiIndexQuantizer *> (idx)) {</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  uint32_t h = fourcc (<span class="stringliteral">"Imiq"</span>);</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  WRITE1 (h);</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  write_index_header (imiq, f);</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  write_ProductQuantizer (&imiq->pq, f);</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexRefineFlat * idxrf =</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  dynamic_cast<const IndexRefineFlat *> (idx)) {</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  uint32_t h = fourcc (<span class="stringliteral">"IxRF"</span>);</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  WRITE1 (h);</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  write_index_header (idxrf, f);</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  write_index (idxrf->base_index, f);</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  write_index (&idxrf->refine_index, f);</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  WRITE1 (idxrf->k_factor);</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIDMap * idxmap =</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  dynamic_cast<const IndexIDMap *> (idx)) {</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  uint32_t h =</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexIDMap2 *<span class="keyword">></span> (idx) ? fourcc (<span class="stringliteral">"IxM2"</span>) :</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  fourcc (<span class="stringliteral">"IxMp"</span>);</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="comment">// no need to store additional info for IndexIDMap2</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  WRITE1 (h);</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  write_index_header (idxmap, f);</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  write_index (idxmap->index, f);</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  WRITEVECTOR (idxmap->id_map);</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexHNSW * idxhnsw =</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  dynamic_cast<const IndexHNSW *> (idx)) {</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  uint32_t h =</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexHNSWFlat*<span class="keyword">></span>(idx) ? fourcc(<span class="stringliteral">"IHNf"</span>) :</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexHNSWPQ*<span class="keyword">></span>(idx) ? fourcc(<span class="stringliteral">"IHNp"</span>) :</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexHNSWSQ*<span class="keyword">></span>(idx) ? fourcc(<span class="stringliteral">"IHNs"</span>) :</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keyword">dynamic_cast<</span><span class="keyword">const </span>IndexHNSW2Level*<span class="keyword">></span>(idx) ? fourcc(<span class="stringliteral">"IHN2"</span>) :</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  0;</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  FAISS_THROW_IF_NOT (h != 0);</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  WRITE1 (h);</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  write_index_header (idxhnsw, f);</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  write_HNSW (&idxhnsw->hnsw, f);</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  write_index (idxhnsw->storage, f);</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  FAISS_THROW_MSG (<span class="stringliteral">"don't know how to serialize this type of index"</span>);</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  }</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> }</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, FILE *f) {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  FileIOWriter writer(f);</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  write_index (idx, &writer);</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> }</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span> </div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  FileIOWriter writer(fname);</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  write_index (idx, &writer);</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> }</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span> </div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> <span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  FileIOWriter writer(fname);</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  write_VectorTransform (vt, &writer);</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> }</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> </div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment"> * Read</span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> </div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_index_header (Index *idx, IOReader *f) {</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  READ1 (idx->d);</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  READ1 (idx->ntotal);</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">Index::idx_t</a> dummy;</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  READ1 (dummy);</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  READ1 (dummy);</div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  READ1 (idx->is_trained);</div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  READ1 (idx->metric_type);</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  idx->verbose = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> }</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> </div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> VectorTransform* read_VectorTransform (IOReader *f) {</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  uint32_t h;</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  READ1 (h);</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  VectorTransform *vt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> </div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"rrot"</span>) || h == fourcc (<span class="stringliteral">"PCAm"</span>) ||</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  h == fourcc (<span class="stringliteral">"LTra"</span>) || h == fourcc (<span class="stringliteral">"PcAm"</span>)) {</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  LinearTransform *lt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"rrot"</span>)) {</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  lt = <span class="keyword">new</span> RandomRotationMatrix ();</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"PCAm"</span>) ||</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  h == fourcc (<span class="stringliteral">"PcAm"</span>)) {</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  PCAMatrix * pca = <span class="keyword">new</span> PCAMatrix ();</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  READ1 (pca->eigen_power);</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  READ1 (pca->random_rotation);</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"PcAm"</span>))</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  READ1 (pca->balanced_bins);</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  READVECTOR (pca->mean);</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  READVECTOR (pca->eigenvalues);</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  READVECTOR (pca->PCAMat);</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  lt = pca;</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"LTra"</span>)) {</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  lt = <span class="keyword">new</span> LinearTransform ();</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  }</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  READ1 (lt->have_bias);</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  READVECTOR (lt->A);</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  READVECTOR (lt->b);</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  FAISS_THROW_IF_NOT (lt->A.size() >= lt->d_in * lt->d_out);</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  FAISS_THROW_IF_NOT (!lt->have_bias || lt->b.size() >= lt->d_out);</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  lt->set_is_orthonormal();</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  vt = lt;</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"RmDT"</span>)) {</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  RemapDimensionsTransform *rdt = <span class="keyword">new</span> RemapDimensionsTransform ();</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  READVECTOR (rdt->map);</div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  vt = rdt;</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"VNrm"</span>)) {</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  NormalizationTransform *nt = <span class="keyword">new</span> NormalizationTransform ();</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  READ1 (nt->norm);</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  vt = nt;</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"VCnt"</span>)) {</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  CenteringTransform *ct = <span class="keyword">new</span> CenteringTransform ();</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  READVECTOR (ct->mean);</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  vt = ct;</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  FAISS_THROW_MSG(<span class="stringliteral">"fourcc not recognized"</span>);</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  }</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  READ1 (vt->d_in);</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  READ1 (vt->d_out);</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  READ1 (vt->is_trained);</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span> }</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> </div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> </div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_ArrayInvertedLists_sizes (</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  IOReader *f, std::vector<size_t> & sizes)</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> {</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  uint32_t list_type;</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  READ1(list_type);</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="keywordflow">if</span> (list_type == fourcc(<span class="stringliteral">"full"</span>)) {</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordtype">size_t</span> os = sizes.size();</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  READVECTOR (sizes);</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  FAISS_THROW_IF_NOT (os == sizes.size());</div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (list_type == fourcc(<span class="stringliteral">"sprs"</span>)) {</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  std::vector<size_t> idsizes;</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  READVECTOR (idsizes);</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j < idsizes.size(); j += 2) {</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  FAISS_THROW_IF_NOT (idsizes[j] < sizes.size());</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  sizes[idsizes[j]] = idsizes[j + 1];</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  }</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  FAISS_THROW_MSG (<span class="stringliteral">"invalid list_type"</span>);</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  }</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span> }</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> </div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> InvertedLists *read_InvertedLists (IOReader *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  uint32_t h;</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  READ1 (h);</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"il00"</span>)) {</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  fprintf(stderr, <span class="stringliteral">"read_InvertedLists:"</span></div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="stringliteral">" WARN! inverted lists not stored with IVF object\n"</span>);</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"ilar"</span>) && !(io_flags & IO_FLAG_MMAP)) {</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  <span class="keyword">auto</span> ails = <span class="keyword">new</span> ArrayInvertedLists (0, 0);</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  READ1 (ails->nlist);</div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  READ1 (ails->code_size);</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  ails->ids.resize (ails->nlist);</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  ails->codes.resize (ails->nlist);</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  std::vector<size_t> sizes (ails->nlist);</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  read_ArrayInvertedLists_sizes (f, sizes);</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  ails->ids[i].resize (sizes[i]);</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  ails->codes[i].resize (sizes[i] * ails->code_size);</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  }</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keywordtype">size_t</span> n = ails->ids[i].size();</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <span class="keywordflow">if</span> (n > 0) {</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  READANDCHECK (ails->codes[i].data(), n * ails->code_size);</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  READANDCHECK (ails->ids[i].data(), n);</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  }</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  }</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">return</span> ails;</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"ilar"</span>) && (io_flags & IO_FLAG_MMAP)) {</div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="comment">// then we load it as an OnDiskInvertedLists</span></div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span> </div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  FileIOReader *reader = <span class="keyword">dynamic_cast<</span>FileIOReader*<span class="keyword">></span>(f);</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  FAISS_THROW_IF_NOT_MSG(reader, <span class="stringliteral">"mmap only supported for File objects"</span>);</div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  FILE *fdesc = reader->f;</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span> </div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keyword">auto</span> ails = <span class="keyword">new</span> OnDiskInvertedLists ();</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  READ1 (ails->nlist);</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  READ1 (ails->code_size);</div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  ails->read_only = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  ails->lists.resize (ails->nlist);</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  std::vector<size_t> sizes (ails->nlist);</div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  read_ArrayInvertedLists_sizes (f, sizes);</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  <span class="keywordtype">size_t</span> o0 = ftell(fdesc), o = o0;</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  { <span class="comment">// do the mmap</span></div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keyword">struct </span>stat buf;</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="keywordtype">int</span> ret = fstat (fileno(fdesc), &buf);</div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  FAISS_THROW_IF_NOT_FMT (ret == 0,</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="stringliteral">"fstat failed: %s"</span>, strerror(errno));</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  ails->totsize = buf.st_size;</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  ails->ptr = (uint8_t*)mmap (<span class="keyword">nullptr</span>, ails->totsize,</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  PROT_READ, MAP_SHARED,</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  fileno(fdesc), 0);</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  FAISS_THROW_IF_NOT_FMT (ails->ptr != MAP_FAILED,</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="stringliteral">"could not mmap: %s"</span>,</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  strerror(errno));</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  }</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> </div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ails->nlist; i++) {</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  OnDiskInvertedLists::List & l = ails->lists[i];</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  l.size = l.capacity = sizes[i];</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  l.offset = o;</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  o += l.size * (<span class="keyword">sizeof</span>(OnDiskInvertedLists::idx_t) +</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  ails->code_size);</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  }</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  FAISS_THROW_IF_NOT(o <= ails->totsize);</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="comment">// resume normal reading of file</span></div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  fseek (fdesc, o, SEEK_SET);</div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keywordflow">return</span> ails;</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"ilod"</span>)) {</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  OnDiskInvertedLists *od = <span class="keyword">new</span> OnDiskInvertedLists();</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  od->read_only = io_flags & IO_FLAG_READ_ONLY;</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  READ1 (od->nlist);</div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  READ1 (od->code_size);</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <span class="comment">// this is a POD object</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  READVECTOR (od->lists);</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  {</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  std::vector<OnDiskInvertedLists::Slot> v;</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  READVECTOR(v);</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  od->slots.assign(v.begin(), v.end());</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  }</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  {</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  std::vector<char> x;</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  READVECTOR(x);</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  od->filename.assign(x.begin(), x.end());</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span> </div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordflow">if</span> (io_flags & IO_FLAG_ONDISK_SAME_DIR) {</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  FileIOReader *reader = <span class="keyword">dynamic_cast<</span>FileIOReader*<span class="keyword">></span>(f);</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  FAISS_THROW_IF_NOT_MSG (</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  reader, <span class="stringliteral">"IO_FLAG_ONDISK_SAME_DIR only supported "</span></div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <span class="stringliteral">"when reading from file"</span>);</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  std::string indexname = reader->name;</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  std::string dirname = <span class="stringliteral">"./"</span>;</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keywordtype">size_t</span> slash = indexname.find_last_of(<span class="charliteral">'/'</span>);</div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="keywordflow">if</span> (slash != std::string::npos) {</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  dirname = indexname.substr(0, slash + 1);</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  }</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  std::string filename = od->filename;</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  slash = filename.find_last_of(<span class="charliteral">'/'</span>);</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <span class="keywordflow">if</span> (slash != std::string::npos) {</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  filename = filename.substr(slash + 1);</div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  }</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  filename = dirname + filename;</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  printf(<span class="stringliteral">"IO_FLAG_ONDISK_SAME_DIR: "</span></div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="stringliteral">"updating ondisk filename from %s to %s\n"</span>,</div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  od->filename.c_str(), filename.c_str());</div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  od->filename = filename;</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  }</div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  }</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  READ1(od->totsize);</div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  od->do_mmap();</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordflow">return</span> od;</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  FAISS_THROW_MSG (<span class="stringliteral">"read_InvertedLists: unsupported invlist type"</span>);</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  }</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span> }</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span> </div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_InvertedLists (</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  IndexIVF *ivf, IOReader *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  InvertedLists *ils = read_InvertedLists (f, io_flags);</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  FAISS_THROW_IF_NOT (!ils || (ils->nlist == ivf->nlist &&</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  ils->code_size == ivf->code_size));</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  ivf->invlists = ils;</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  ivf->own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> }</div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span> </div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_InvertedLists (</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  IndexBinaryIVF *ivf, IOReader *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  InvertedLists *ils = read_InvertedLists (f, io_flags);</div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  FAISS_THROW_IF_NOT (!ils || (ils->nlist == ivf->nlist &&</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  ils->code_size == ivf->code_size));</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  ivf->invlists = ils;</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  ivf->own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span> }</div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span> </div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_ProductQuantizer (ProductQuantizer *pq, IOReader *f) {</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  READ1 (pq->d);</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  READ1 (pq->M);</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  READ1 (pq->nbits);</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  pq->set_derived_values ();</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  READVECTOR (pq->centroids);</div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span> }</div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span> </div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_ScalarQuantizer (ScalarQuantizer *ivsc, IOReader *f) {</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  READ1 (ivsc->qtype);</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  READ1 (ivsc->rangestat);</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  READ1 (ivsc->rangestat_arg);</div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  READ1 (ivsc->d);</div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  READ1 (ivsc->code_size);</div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  READVECTOR (ivsc->trained);</div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span> }</div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span> </div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span> </div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_HNSW (HNSW *hnsw, IOReader *f) {</div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  READVECTOR (hnsw->assign_probas);</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  READVECTOR (hnsw->cum_nneighbor_per_level);</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  READVECTOR (hnsw->levels);</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  READVECTOR (hnsw->offsets);</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  READVECTOR (hnsw->neighbors);</div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span> </div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  READ1 (hnsw->entry_point);</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  READ1 (hnsw->max_level);</div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  READ1 (hnsw->efConstruction);</div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  READ1 (hnsw->efSearch);</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  READ1 (hnsw->upper_beam);</div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span> }</div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span> </div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> ProductQuantizer * read_ProductQuantizer (<span class="keyword">const</span> <span class="keywordtype">char</span>*fname) {</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  FileIOReader reader(fname);</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keywordflow">return</span> read_ProductQuantizer(&reader);</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span> }</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span> </div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span> ProductQuantizer * read_ProductQuantizer (IOReader *reader) {</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  ProductQuantizer *pq = <span class="keyword">new</span> ProductQuantizer();</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  ScopeDeleter1<ProductQuantizer> del (pq);</div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> </div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  read_ProductQuantizer(pq, reader);</div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  del.release ();</div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="keywordflow">return</span> pq;</div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span> }</div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span> </div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_ivf_header (</div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  IndexIVF *ivf, IOReader *f,</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  std::vector<std::vector<Index::idx_t> > *ids = <span class="keyword">nullptr</span>)</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span> {</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  read_index_header (ivf, f);</div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  READ1 (ivf->nlist);</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  READ1 (ivf->nprobe);</div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  ivf->quantizer = read_index (f);</div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  ivf->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  <span class="keywordflow">if</span> (ids) { <span class="comment">// used in legacy "Iv" formats</span></div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  ids->resize (ivf->nlist);</div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ivf->nlist; i++)</div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  READVECTOR ((*ids)[i]);</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  READ1 (ivf->maintain_direct_map);</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  READVECTOR (ivf->direct_map);</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span> }</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span> </div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span> <span class="comment">// used for legacy formats</span></div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="keyword">static</span> ArrayInvertedLists *set_array_invlist(</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  IndexIVF *ivf, std::vector<std::vector<Index::idx_t> > &ids)</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span> {</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  ArrayInvertedLists *ail = <span class="keyword">new</span> ArrayInvertedLists (</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  ivf->nlist, ivf->code_size);</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  std::swap (ail->ids, ids);</div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  ivf->invlists = ail;</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  ivf->own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keywordflow">return</span> ail;</div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span> }</div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span> </div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="keyword">static</span> IndexIVFPQ *read_ivfpq (IOReader *f, uint32_t h, <span class="keywordtype">int</span> io_flags)</div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> {</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <span class="keywordtype">bool</span> legacy = h == fourcc (<span class="stringliteral">"IvQR"</span>) || h == fourcc (<span class="stringliteral">"IvPQ"</span>);</div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span> </div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  IndexIVFPQR *ivfpqr =</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  h == fourcc (<span class="stringliteral">"IvQR"</span>) || h == fourcc (<span class="stringliteral">"IwQR"</span>) ?</div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="keyword">new</span> IndexIVFPQR () : nullptr;</div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  IndexIVFPQ * ivpq = ivfpqr ? ivfpqr : <span class="keyword">new</span> IndexIVFPQ ();</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span> </div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  std::vector<std::vector<Index::idx_t> > ids;</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  read_ivf_header (ivpq, f, legacy ? &ids : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  READ1 (ivpq->by_residual);</div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  READ1 (ivpq->code_size);</div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  read_ProductQuantizer (&ivpq->pq, f);</div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span> </div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <span class="keywordflow">if</span> (legacy) {</div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  ArrayInvertedLists *ail = set_array_invlist (ivpq, ids);</div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ail->nlist; i++)</div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  READVECTOR (ail->codes[i]);</div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  read_InvertedLists (ivpq, f, io_flags);</div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  }</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span> </div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="keywordflow">if</span> (ivpq->is_trained) {</div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  <span class="comment">// precomputed table not stored. It is cheaper to recompute it</span></div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  ivpq->use_precomputed_table = 0;</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  <span class="keywordflow">if</span> (ivpq->by_residual)</div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  ivpq->precompute_table ();</div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  read_ProductQuantizer (&ivfpqr->refine_pq, f);</div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  READVECTOR (ivfpqr->refine_codes);</div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  READ1 (ivfpqr->k_factor);</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  }</div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  }</div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="keywordflow">return</span> ivpq;</div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span> }</div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> </div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span> <span class="keywordtype">int</span> read_old_fmt_hack = 0;</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span> </div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span> Index *read_index (IOReader *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  Index * idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  uint32_t h;</div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  READ1 (h);</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxFI"</span>) || h == fourcc (<span class="stringliteral">"IxF2"</span>)) {</div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  IndexFlat *idxf;</div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxFI"</span>)) idxf = <span class="keyword">new</span> IndexFlatIP ();</div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  <span class="keywordflow">else</span> idxf = <span class="keyword">new</span> IndexFlatL2 ();</div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  read_index_header (idxf, f);</div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  READVECTOR (idxf->xb);</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  FAISS_THROW_IF_NOT (idxf->xb.size() == idxf->ntotal * idxf->d);</div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  <span class="comment">// leak!</span></div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  idx = idxf;</div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IxHE"</span>) || h == fourcc(<span class="stringliteral">"IxHe"</span>)) {</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  IndexLSH * idxl = <span class="keyword">new</span> IndexLSH ();</div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  read_index_header (idxl, f);</div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  READ1 (idxl->nbits);</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  READ1 (idxl->rotate_data);</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  READ1 (idxl->train_thresholds);</div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  READVECTOR (idxl->thresholds);</div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  READ1 (idxl->bytes_per_vec);</div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IxHE"</span>)) {</div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  FAISS_THROW_IF_NOT_FMT (idxl->nbits % 64 == 0,</div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  <span class="stringliteral">"can only read old format IndexLSH with "</span></div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  <span class="stringliteral">"nbits multiple of 64 (got %d)"</span>,</div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  (<span class="keywordtype">int</span>) idxl->nbits);</div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  <span class="comment">// leak</span></div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  idxl->bytes_per_vec *= 8;</div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  }</div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  {</div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  RandomRotationMatrix *rrot = <span class="keyword">dynamic_cast<</span>RandomRotationMatrix *<span class="keyword">></span></div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  (read_VectorTransform (f));</div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  FAISS_THROW_IF_NOT_MSG(rrot, <span class="stringliteral">"expected a random rotation"</span>);</div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  idxl->rrot = *rrot;</div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <span class="keyword">delete</span> rrot;</div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  }</div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  READVECTOR (idxl->codes);</div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  FAISS_THROW_IF_NOT (idxl->rrot.d_in == idxl->d &&</div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  idxl->rrot.d_out == idxl->nbits);</div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  FAISS_THROW_IF_NOT (</div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  idxl->codes.size() == idxl->ntotal * idxl->bytes_per_vec);</div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  idx = idxl;</div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxPQ"</span>) || h == fourcc (<span class="stringliteral">"IxPo"</span>) ||</div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  h == fourcc (<span class="stringliteral">"IxPq"</span>)) {</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  <span class="comment">// IxPQ and IxPo were merged into the same IndexPQ object</span></div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  IndexPQ * idxp =<span class="keyword">new</span> IndexPQ ();</div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  read_index_header (idxp, f);</div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  read_ProductQuantizer (&idxp->pq, f);</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  READVECTOR (idxp->codes);</div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxPo"</span>) || h == fourcc (<span class="stringliteral">"IxPq"</span>)) {</div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  READ1 (idxp->search_type);</div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  READ1 (idxp->encode_signs);</div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  READ1 (idxp->polysemous_ht);</div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  }</div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  <span class="comment">// Old versoins of PQ all had metric_type set to INNER_PRODUCT</span></div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  <span class="comment">// when they were in fact using L2. Therefore, we force metric type</span></div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <span class="comment">// to L2 when the old format is detected</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxPQ"</span>) || h == fourcc (<span class="stringliteral">"IxPo"</span>)) {</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  idxp->metric_type = METRIC_L2;</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  }</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  idx = idxp;</div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IvFl"</span>) || h == fourcc(<span class="stringliteral">"IvFL"</span>)) { <span class="comment">// legacy</span></div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  IndexIVFFlat * ivfl = <span class="keyword">new</span> IndexIVFFlat ();</div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  std::vector<std::vector<Index::idx_t> > ids;</div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  read_ivf_header (ivfl, f, &ids);</div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  ivfl->code_size = ivfl->d * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  ArrayInvertedLists *ail = set_array_invlist (ivfl, ids);</div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span> </div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IvFL"</span>)) {</div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ivfl->nlist; i++) {</div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  READVECTOR (ail->codes[i]);</div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  }</div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  } <span class="keywordflow">else</span> { <span class="comment">// old format</span></div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ivfl->nlist; i++) {</div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  std::vector<float> vec;</div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  READVECTOR (vec);</div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  ail->codes[i].resize(vec.size() * <span class="keyword">sizeof</span>(float));</div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  memcpy(ail->codes[i].data(), vec.data(),</div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  ail->codes[i].size());</div>
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  }</div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  }</div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  idx = ivfl;</div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IwFd"</span>)) {</div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  IndexIVFFlatDedup * ivfl = <span class="keyword">new</span> IndexIVFFlatDedup ();</div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  read_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  ivfl->code_size = ivfl->d * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  {</div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  std::vector<Index::idx_t> tab;</div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  READVECTOR (tab);</div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i < tab.size(); i += 2) {</div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  std::pair<Index::idx_t, Index::idx_t></div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  pair (tab[i], tab[i + 1]);</div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  ivfl->instances.insert (pair);</div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  }</div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  }</div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  read_InvertedLists (ivfl, f, io_flags);</div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  idx = ivfl;</div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IwFl"</span>)) {</div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  IndexIVFFlat * ivfl = <span class="keyword">new</span> IndexIVFFlat ();</div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  read_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  ivfl->code_size = ivfl->d * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  read_InvertedLists (ivfl, f, io_flags);</div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  idx = ivfl;</div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IxSQ"</span>)) {</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  IndexScalarQuantizer * idxs = <span class="keyword">new</span> IndexScalarQuantizer ();</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  read_index_header (idxs, f);</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  read_ScalarQuantizer (&idxs->sq, f);</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  READVECTOR (idxs->codes);</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  idxs->code_size = idxs->sq.code_size;</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  idx = idxs;</div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IvSQ"</span>)) { <span class="comment">// legacy</span></div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  IndexIVFScalarQuantizer * ivsc = <span class="keyword">new</span> IndexIVFScalarQuantizer();</div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  std::vector<std::vector<Index::idx_t> > ids;</div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  read_ivf_header (ivsc, f, &ids);</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  read_ScalarQuantizer (&ivsc->sq, f);</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  READ1 (ivsc->code_size);</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  ArrayInvertedLists *ail = set_array_invlist (ivsc, ids);</div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i < ivsc->nlist; i++)</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  READVECTOR (ail->codes[i]);</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  idx = ivsc;</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IwSQ"</span>) || h == fourcc (<span class="stringliteral">"IwSq"</span>)) {</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  IndexIVFScalarQuantizer * ivsc = <span class="keyword">new</span> IndexIVFScalarQuantizer();</div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  read_ivf_header (ivsc, f);</div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  read_ScalarQuantizer (&ivsc->sq, f);</div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  READ1 (ivsc->code_size);</div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IwSQ"</span>)) {</div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  ivsc->by_residual = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  READ1 (ivsc->by_residual);</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  }</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  read_InvertedLists (ivsc, f, io_flags);</div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  idx = ivsc;</div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IwSh"</span>)) {</div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  IndexIVFSpectralHash *ivsp = <span class="keyword">new</span> IndexIVFSpectralHash ();</div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  read_ivf_header (ivsp, f);</div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  ivsp->vt = read_VectorTransform (f);</div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  ivsp->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  READ1 (ivsp->nbit);</div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  <span class="comment">// not stored by write_ivf_header</span></div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  ivsp->code_size = (ivsp->nbit + 7) / 8;</div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  READ1 (ivsp->period);</div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  READ1 (ivsp->threshold_type);</div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  READVECTOR (ivsp->trained);</div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  read_InvertedLists (ivsp, f, io_flags);</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  idx = ivsp;</div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IvPQ"</span>) || h == fourcc (<span class="stringliteral">"IvQR"</span>) ||</div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  h == fourcc (<span class="stringliteral">"IwPQ"</span>) || h == fourcc (<span class="stringliteral">"IwQR"</span>)) {</div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span> </div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  idx = read_ivfpq (f, h, io_flags);</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span> </div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IxPT"</span>)) {</div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  IndexPreTransform * ixpt = <span class="keyword">new</span> IndexPreTransform();</div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  ixpt->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  read_index_header (ixpt, f);</div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>  <span class="keywordtype">int</span> nt;</div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  <span class="keywordflow">if</span> (read_old_fmt_hack == 2) {</div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  nt = 1;</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  READ1 (nt);</div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  }</div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < nt; i++) {</div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  ixpt->chain.push_back (read_VectorTransform (f));</div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  }</div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  ixpt->index = read_index (f, io_flags);</div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  idx = ixpt;</div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"Imiq"</span>)) {</div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  MultiIndexQuantizer * imiq = <span class="keyword">new</span> MultiIndexQuantizer ();</div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  read_index_header (imiq, f);</div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  read_ProductQuantizer (&imiq->pq, f);</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  idx = imiq;</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IxRF"</span>)) {</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  IndexRefineFlat *idxrf = <span class="keyword">new</span> IndexRefineFlat ();</div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  read_index_header (idxrf, f);</div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  idxrf->base_index = read_index(f, io_flags);</div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  idxrf->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  IndexFlat *rf = <span class="keyword">dynamic_cast<</span>IndexFlat*<span class="keyword">></span> (read_index (f, io_flags));</div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  std::swap (*rf, idxrf->refine_index);</div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <span class="keyword">delete</span> rf;</div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  READ1 (idxrf->k_factor);</div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  idx = idxrf;</div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">"IxMp"</span>) || h == fourcc (<span class="stringliteral">"IxM2"</span>)) {</div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  <span class="keywordtype">bool</span> is_map2 = h == fourcc (<span class="stringliteral">"IxM2"</span>);</div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  IndexIDMap * idxmap = is_map2 ? <span class="keyword">new</span> IndexIDMap2 () : new IndexIDMap ();</div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  read_index_header (idxmap, f);</div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  idxmap->index = read_index (f, io_flags);</div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  idxmap->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  READVECTOR (idxmap->id_map);</div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  <span class="keywordflow">if</span> (is_map2) {</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  <span class="keyword">static_cast<</span>IndexIDMap2*<span class="keyword">></span>(idxmap)->construct_rev_map ();</div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  }</div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  idx = idxmap;</div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"Ix2L"</span>)) {</div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  Index2Layer * idxp = <span class="keyword">new</span> Index2Layer ();</div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>  read_index_header (idxp, f);</div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>  idxp->q1.quantizer = read_index (f, io_flags);</div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  READ1 (idxp->q1.nlist);</div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  READ1 (idxp->q1.quantizer_trains_alone);</div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  read_ProductQuantizer (&idxp->pq, f);</div>
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>  READ1 (idxp->code_size_1);</div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>  READ1 (idxp->code_size_2);</div>
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  READ1 (idxp->code_size);</div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  READVECTOR (idxp->codes);</div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  idx = idxp;</div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc(<span class="stringliteral">"IHNf"</span>) || h == fourcc(<span class="stringliteral">"IHNp"</span>) ||</div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  h == fourcc(<span class="stringliteral">"IHNs"</span>) || h == fourcc(<span class="stringliteral">"IHN2"</span>)) {</div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>  IndexHNSW *idxhnsw = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IHNf"</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWFlat ();</div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IHNp"</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWPQ ();</div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IHNs"</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWSQ ();</div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IHN2"</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSW2Level ();</div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  read_index_header (idxhnsw, f);</div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  read_HNSW (&idxhnsw->hnsw, f);</div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  idxhnsw->storage = read_index (f, io_flags);</div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  idxhnsw->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">"IHNp"</span>)) {</div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  <span class="keyword">dynamic_cast<</span>IndexPQ*<span class="keyword">></span>(idxhnsw->storage)->pq.compute_sdc_table ();</div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  }</div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  idx = idxhnsw;</div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  FAISS_THROW_FMT(<span class="stringliteral">"Index type 0x%08x not supported\n"</span>, h);</div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  }</div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> }</div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span> </div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> </div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span> Index *read_index (FILE * f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  FileIOReader reader(f);</div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  <span class="keywordflow">return</span> read_index(&reader, io_flags);</div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span> }</div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span> </div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span> Index *read_index (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  FileIOReader reader(fname);</div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  Index *idx = read_index (&reader, io_flags);</div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span> }</div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span> </div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span> VectorTransform *read_VectorTransform (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  FileIOReader reader(fname);</div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  VectorTransform *vt = read_VectorTransform (&reader);</div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span> }</div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> </div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span> <span class="comment"> * cloning functions</span></div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> <span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span> </div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> </div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span> </div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span> Index * clone_index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span> {</div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  Cloner cl;</div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  <span class="keywordflow">return</span> cl.clone_Index (index);</div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span> }</div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> </div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span> <span class="comment">// assumes there is a copy constructor ready. Always try from most</span></div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span> <span class="comment">// specific to most general</span></div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> <span class="preprocessor">#define TRYCLONE(classname, obj) \</span></div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span> <span class="preprocessor"> if (const classname *clo = dynamic_cast<const classname *>(obj)) { \</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> <span class="preprocessor"> return new classname(*clo); \</span></div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span> <span class="preprocessor"> } else</span></div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span> VectorTransform *Cloner::clone_VectorTransform (<span class="keyword">const</span> VectorTransform *vt)</div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span> {</div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  TRYCLONE (RemapDimensionsTransform, vt)</div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  TRYCLONE (OPQMatrix, vt)</div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  TRYCLONE (PCAMatrix, vt)</div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  TRYCLONE (RandomRotationMatrix, vt)</div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  TRYCLONE (LinearTransform, vt)</div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  {</div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  FAISS_THROW_MSG(<span class="stringliteral">"clone not supported for this type of VectorTransform"</span>);</div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>  }</div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span> }</div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> </div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span> IndexIVF * Cloner::clone_IndexIVF (<span class="keyword">const</span> IndexIVF *ivf)</div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span> {</div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  TRYCLONE (IndexIVFPQR, ivf)</div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  TRYCLONE (IndexIVFPQ, ivf)</div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>  TRYCLONE (IndexIVFFlat, ivf)</div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  TRYCLONE (IndexIVFScalarQuantizer, ivf)</div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  {</div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>  FAISS_THROW_MSG(<span class="stringliteral">"clone not supported for this type of IndexIVF"</span>);</div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>  }</div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> }</div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span> </div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span> Index *Cloner::clone_Index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span> {</div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  TRYCLONE (IndexPQ, index)</div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  TRYCLONE (IndexLSH, index)</div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>  TRYCLONE (IndexFlatL2, index)</div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  TRYCLONE (IndexFlatIP, index)</div>
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>  TRYCLONE (IndexFlat, index)</div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  TRYCLONE (IndexScalarQuantizer, index)</div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  TRYCLONE (MultiIndexQuantizer, index)</div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>  if (const IndexIVF * ivf = dynamic_cast<const IndexIVF*>(index)) {</div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>  IndexIVF *res = clone_IndexIVF (ivf);</div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>  <span class="keywordflow">if</span> (ivf->invlists == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>  res->invlists = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> *ails = dynamic_cast<const ArrayInvertedLists*></div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  (ivf->invlists)) {</div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>  res->invlists = <span class="keyword">new</span> ArrayInvertedLists(*ails);</div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  res->own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  FAISS_THROW_MSG( <span class="stringliteral">"clone not supported for this type of inverted lists"</span>);</div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>  }</div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span>  res->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>  res->quantizer = clone_Index (ivf->quantizer);</div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>  <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexPreTransform * ipt =</div>
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span>  dynamic_cast<const IndexPreTransform*> (index)) {</div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>  IndexPreTransform *res = <span class="keyword">new</span> IndexPreTransform ();</div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>  res->d = ipt->d;</div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>  res->index = clone_Index (ipt->index);</div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < ipt->chain.size(); i++)</div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span>  res->chain.push_back (clone_VectorTransform (ipt->chain[i]));</div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>  res->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>  <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexIDMap *idmap =</div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>  dynamic_cast<const IndexIDMap*> (index)) {</div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span>  IndexIDMap *res = <span class="keyword">new</span> IndexIDMap (*idmap);</div>
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>  res->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>  res->index = clone_Index (idmap->index);</div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span>  FAISS_THROW_MSG( <span class="stringliteral">"clone not supported for this type of Index"</span>);</div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  }</div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span> }</div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span> </div>
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span> </div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span> <span class="keyword">static</span> <span class="keywordtype">void</span> write_index_binary_header (<span class="keyword">const</span> IndexBinary *idx, IOWriter *f) {</div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  WRITE1 (idx->d);</div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  WRITE1 (idx->code_size);</div>
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>  WRITE1 (idx->ntotal);</div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  WRITE1 (idx->is_trained);</div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>  WRITE1 (idx->metric_type);</div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span> }</div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span> </div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span> <span class="keyword">static</span> <span class="keywordtype">void</span> write_binary_ivf_header (<span class="keyword">const</span> IndexBinaryIVF *ivf, IOWriter *f) {</div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  write_index_binary_header (ivf, f);</div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  WRITE1 (ivf->nlist);</div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>  WRITE1 (ivf->nprobe);</div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>  write_index_binary (ivf->quantizer, f);</div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>  WRITE1 (ivf->maintain_direct_map);</div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>  WRITEVECTOR (ivf->direct_map);</div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span> }</div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span> </div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span> <span class="keywordtype">void</span> write_index_binary (<span class="keyword">const</span> IndexBinary *idx, IOWriter *f) {</div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexBinaryFlat *idxf =</div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  dynamic_cast<const IndexBinaryFlat *> (idx)) {</div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  uint32_t h = fourcc (<span class="stringliteral">"IBxF"</span>);</div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  WRITE1 (h);</div>
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  write_index_binary_header (idx, f);</div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>  WRITEVECTOR (idxf->xb);</div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexBinaryIVF *ivf =</div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>  dynamic_cast<const IndexBinaryIVF *> (idx)) {</div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>  uint32_t h = fourcc (<span class="stringliteral">"IBwF"</span>);</div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  WRITE1 (h);</div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  write_binary_ivf_header (ivf, f);</div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  write_InvertedLists (ivf->invlists, f);</div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexBinaryFromFloat * idxff =</div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  dynamic_cast<const IndexBinaryFromFloat *> (idx)) {</div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  uint32_t h = fourcc (<span class="stringliteral">"IBFf"</span>);</div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>  WRITE1 (h);</div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>  write_index_binary_header (idxff, f);</div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>  write_index (idxff->index, f);</div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexBinaryHNSW *idxhnsw =</div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span>  dynamic_cast<const IndexBinaryHNSW *> (idx)) {</div>
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  uint32_t h = fourcc (<span class="stringliteral">"IBHf"</span>);</div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  WRITE1 (h);</div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  write_index_binary_header (idxhnsw, f);</div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>  write_HNSW (&idxhnsw->hnsw, f);</div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  write_index_binary (idxhnsw->storage, f);</div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  FAISS_THROW_MSG (<span class="stringliteral">"don't know how to serialize this type of index"</span>);</div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  }</div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span> }</div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span> </div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span> <span class="keywordtype">void</span> write_index_binary (<span class="keyword">const</span> IndexBinary *idx, FILE *f) {</div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  FileIOWriter writer(f);</div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  write_index_binary(idx, &writer);</div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span> }</div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span> </div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span> <span class="keywordtype">void</span> write_index_binary (<span class="keyword">const</span> IndexBinary *idx, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  FileIOWriter writer(fname);</div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  write_index_binary (idx, &writer);</div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span> }</div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span> </div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_index_binary_header (IndexBinary *idx, IOReader *f) {</div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  READ1 (idx->d);</div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  READ1 (idx->code_size);</div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  READ1 (idx->ntotal);</div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  READ1 (idx->is_trained);</div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  READ1 (idx->metric_type);</div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  idx->verbose = <span class="keyword">false</span>;</div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span> }</div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span> </div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_binary_ivf_header (</div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  IndexBinaryIVF *ivf, IOReader *f,</div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  std::vector<std::vector<Index::idx_t> > *ids = <span class="keyword">nullptr</span>)</div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span> {</div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  read_index_binary_header (ivf, f);</div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  READ1 (ivf->nlist);</div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  READ1 (ivf->nprobe);</div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  ivf->quantizer = read_index_binary (f);</div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  ivf->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>  <span class="keywordflow">if</span> (ids) { <span class="comment">// used in legacy "Iv" formats</span></div>
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  ids->resize (ivf->nlist);</div>
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < ivf->nlist; i++)</div>
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  READVECTOR ((*ids)[i]);</div>
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  }</div>
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  READ1 (ivf->maintain_direct_map);</div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  READVECTOR (ivf->direct_map);</div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span> }</div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span> </div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span> IndexBinary *read_index_binary (IOReader *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>  IndexBinary * idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  uint32_t h;</div>
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  READ1 (h);</div>
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IBxF"</span>)) {</div>
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>  IndexBinaryFlat *idxf = <span class="keyword">new</span> IndexBinaryFlat ();</div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  read_index_binary_header (idxf, f);</div>
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  READVECTOR (idxf->xb);</div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>  FAISS_THROW_IF_NOT (idxf->xb.size() == idxf->ntotal * idxf->code_size);</div>
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>  <span class="comment">// leak!</span></div>
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  idx = idxf;</div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IBwF"</span>)) {</div>
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  IndexBinaryIVF *ivf = <span class="keyword">new</span> IndexBinaryIVF ();</div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  read_binary_ivf_header (ivf, f);</div>
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  read_InvertedLists (ivf, f, io_flags);</div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  idx = ivf;</div>
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IBFf"</span>)) {</div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  IndexBinaryFromFloat *idxff = <span class="keyword">new</span> IndexBinaryFromFloat ();</div>
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>  read_index_binary_header (idxff, f);</div>
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  idxff->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  idxff->index = read_index (f, io_flags);</div>
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  idx = idxff;</div>
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">"IBHf"</span>)) {</div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  IndexBinaryHNSW *idxhnsw = <span class="keyword">new</span> IndexBinaryHNSW ();</div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  read_index_binary_header (idxhnsw, f);</div>
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  read_HNSW (&idxhnsw->hnsw, f);</div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  idxhnsw->storage = read_index_binary (f, io_flags);</div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  idxhnsw->own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  idx = idxhnsw;</div>
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  FAISS_THROW_FMT(<span class="stringliteral">"Index type 0x%08x not supported\n"</span>, h);</div>
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>  }</div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span> }</div>
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span> </div>
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span> IndexBinary *read_index_binary (FILE * f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  FileIOReader reader(f);</div>
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  <span class="keywordflow">return</span> read_index_binary(&reader, io_flags);</div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span> }</div>
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span> </div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span> IndexBinary *read_index_binary (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  FileIOReader reader(fname);</div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  IndexBinary *idx = read_index_binary (&reader, io_flags);</div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span> }</div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span> </div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span> </div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span> } <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1ScopeFileCloser_html"><div class="ttname"><a href="structfaiss_1_1ScopeFileCloser.html">faiss::ScopeFileCloser</a></div><div class="ttdef"><b>Definition:</b> <a href="index__io_8cpp_source.html#l00115">index_io.cpp:115</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_ad3f0d3071f987baabbdd3da4500c87ea"><div class="ttname"><a href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">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="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#l00183">AuxIndexStructures.h:183</a></div></div>
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