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| <li class="navelem"><a class="el" href="dir_14b95f261231c5f650b9b0a09b57a6c5.html">density</a></li><li class="navelem"><a class="el" href="dir_e0b5a940fd5435f299127cc9babd5c8d.html">include</a></li> </ul> |
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| <div class="title">density_sketch_impl.hpp</div> </div> |
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| <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"> * Licensed to the Apache Software Foundation (ASF) under one</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * distributed with this work for additional information</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * "License"); you may not use this file except in compliance</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * with the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * software distributed under the License is distributed on an</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * KIND, either express or implied. See the License for the</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * specific language governing permissions and limitations</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * under the License.</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</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">#ifndef DENSITY_SKETCH_IMPL_HPP_</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define DENSITY_SKETCH_IMPL_HPP_</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 <algorithm></span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <sstream></span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "memory_operations.hpp"</span></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "conditional_forward.hpp"</span></div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span><a class="code" href="namespacedatasketches.html">datasketches</a> {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <a class="code" href="classdatasketches_1_1density__sketch.html#a08daaa6a0d62a61b612a0dbbbd0b22d5">density_sketch<T, K, A>::density_sketch</a>(uint16_t k, uint32_t dim, <span class="keyword">const</span> K& kernel, <span class="keyword">const</span> A& allocator):</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> kernel_(kernel),</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> k_(k),</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> dim_(dim),</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> num_retained_(0),</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> n_(0),</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> levels_(1, Level(allocator), allocator)</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>  check_k(k);</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>  </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <a class="code" href="classdatasketches_1_1density__sketch.html#a08daaa6a0d62a61b612a0dbbbd0b22d5">density_sketch<T, K, A>::density_sketch</a>(uint16_t k, uint32_t dim, uint32_t num_retained, uint64_t n,</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  Levels&& levels, <span class="keyword">const</span> K& kernel):</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> kernel_(kernel),</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> k_(k),</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> dim_(dim),</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> num_retained_(num_retained),</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> n_(n),</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> levels_(std::move(levels))</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> {</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  check_k(k);</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> }</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a59f4c39b9f2e762e8e3445ef89e1d264"> 57</a></span> uint16_t <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_k</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> k_;</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a57bff8d89cd2bde903090aa30208f610"> 62</a></span> uint32_t <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_dim</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> dim_;</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">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a5a2b7a58dc85678d08752945ff655362"> 67</a></span> <span class="keywordtype">bool</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::is_empty</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> num_retained_ == 0;</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#af857be9469a7565252626f27e1f9d74d"> 72</a></span> uint64_t <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_n</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> n_;</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a31fa76458d81a17dbebfcb828e531f14"> 77</a></span> uint32_t <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_num_retained</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a59f4c39b9f2e762e8e3445ef89e1d264"> 78</a></span>  <span class="keywordflow">return</span> num_retained_;</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> }</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ae95a04b1d7dccb3d9b3f3c3d087aa8e6"> 82</a></span> <span class="keywordtype">bool</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::is_estimation_mode</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> levels_.size() > 1;</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a57bff8d89cd2bde903090aa30208f610"> 84</a></span> }</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="keyword">template</span><<span class="keyword">typename</span> FwdVector></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a5e26f9aae4a59c1345549f9ce512d253"> 88</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::update</a>(FwdVector&& point) {</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (point.size() != dim_) <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"dimension mismatch"</span>);</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a5a2b7a58dc85678d08752945ff655362"> 90</a></span>  <span class="keywordflow">while</span> (num_retained_ >= k_ * levels_.size()) compact();</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  levels_[0].push_back(std::forward<FwdVector>(point));</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  ++num_retained_;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  ++n_;</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> }</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  </div> |
| <div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#af857be9469a7565252626f27e1f9d74d"> 96</a></span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">template</span><<span class="keyword">typename</span> FwdSketch></div> |
| <div class="line"><a name="l00098"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1defe87981c9505d416392690b3125c6"> 98</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::merge</a>(FwdSketch&& other) {</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (other.is_empty()) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (other.dim_ != dim_) <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"dimension mismatch"</span>);</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">while</span> (levels_.size() < other.levels_.size()) levels_.push_back(Level(levels_.get_allocator()));</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a31fa76458d81a17dbebfcb828e531f14"> 102</a></span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> height = 0; height < other.levels_.size(); ++height) {</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  std::copy(</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  forward_begin(conditional_forward<FwdSketch>(other.levels_[height])),</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  forward_end(conditional_forward<FwdSketch>(other.levels_[height])),</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  back_inserter(levels_[height])</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  );</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ae95a04b1d7dccb3d9b3f3c3d087aa8e6"> 108</a></span>  }</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  num_retained_ += other.num_retained_;</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  n_ += other.n_;</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">while</span> (num_retained_ >= k_ * levels_.size()) compact();</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  </div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1ae5f35215393f3272f1b284ec782ef5"> 115</a></span> T <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_estimate</a>(<span class="keyword">const</span> std::vector<T>& point)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (is_empty()) <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"operation is undefined for an empty sketch"</span>);</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  T density = 0;</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> height = 0; height < levels_.size(); ++height) {</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& p: levels_[height]) {</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  density += (1 << height) * kernel_(p, point) / n_;</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1defe87981c9505d416392690b3125c6"> 122</a></span>  }</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> density;</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a9d85cf47c4ecd0580ec623c42006dd1b"> 127</a></span> A <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::get_allocator</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1ae5f35215393f3272f1b284ec782ef5"> 128</a></span>  <span class="keywordflow">return</span> levels_.<a class="code" href="classdatasketches_1_1density__sketch.html#a9d85cf47c4ecd0580ec623c42006dd1b">get_allocator</a>();</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>  </div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::compact</a>() {</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> height = 0; height < levels_.size(); ++height) {</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a9d85cf47c4ecd0580ec623c42006dd1b"> 134</a></span>  <span class="keywordflow">if</span> (levels_[height].size() >= k_) {</div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (height + 1 >= levels_.size()) levels_.push_back(Level(levels_.get_allocator()));</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  compact_level(height);</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">break</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"><a class="line" href="classdatasketches_1_1density__sketch.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924"> 140</a></span> }</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::compact_level</a>(<span class="keywordtype">unsigned</span> height) {</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">auto</span>& level = levels_[height];</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  std::vector<bool> bits(level.size());</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  bits[0] = random_utils::random_bit();</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  std::shuffle(level.begin(), level.end(), random_utils::rand);</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 1; i < level.size(); ++i) {</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  T delta = 0;</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; j < i; ++j) {</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1c7a57911806d47ee3cebe9fad59f836"> 151</a></span>  delta += (bits[j] ? 1 : -1) * kernel_(level[i], level[j]);</div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  bits[i] = delta < 0;</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="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < level.size(); ++i) {</div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">if</span> (bits[i]) {</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  levels_[height + 1].push_back(std::move(level[i]));</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  --num_retained_;</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>  }</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  level.clear();</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> }</div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  </div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">/* Serialized sketch layout:</span></div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * Int || Start Byte Addr:</span></div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * Addr:</span></div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * || 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |</span></div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> * 0 || Preamble_Ints | SerVer | FamID | Flags |------- K -------|---- unused -----|</span></div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> * || 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |</span></div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"> * 2 ||------------- Num Dimensions --------------|------ Num Retained Items ---------|</span></div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * || 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |</span></div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * 4 ||---------------------------Items Seen Count (N)--------------------------------|</span></div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * Ints 2 and 3 are omitted when the sketch is empty, meaning Num Dimensions is stored at</span></div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * offset 8 in that case. Otherwise, Int 5 is the start of level data, consisting of the</span></div> |
| <div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a592a7af55659ff803b26a45552a68dda"> 179</a></span> <span class="comment"> * size of the level (as a uint32 value) followed by that number of points, with </span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * Num Dimensions per point.</span></div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  </div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00184"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924"> 184</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::serialize</a>(std::ostream& os)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">const</span> uint8_t preamble_ints = is_empty() ? PREAMBLE_INTS_SHORT : PREAMBLE_INTS_LONG;</div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  write(os, preamble_ints);</div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keyword">const</span> uint8_t ser_ver = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00188"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ad5c959a538216a09ab28c5283585956c"> 188</a></span>  write(os, ser_ver);</div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">const</span> uint8_t family = FAMILY_ID;</div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  write(os, family);</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="comment">// only empty is a valid flag</span></div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">const</span> uint8_t flags_byte = (is_empty() ? 1 << flags::IS_EMPTY : 0);</div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  write(os, flags_byte);</div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  write(os, k_);</div> |
| <div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ae11e60e117300685401961e36f196f7a"> 196</a></span>  <span class="keyword">const</span> uint16_t unused = 0;</div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  write(os, unused);</div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  write(os, dim_);</div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  </div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (is_empty())</div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  </div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  write(os, num_retained_);</div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  write(os, n_);</div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  </div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// levels array -- uint32_t since a single level may be larger than k</span></div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordtype">size_t</span> pt_size = <span class="keyword">sizeof</span>(T) * dim_;</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Level& lvl : levels_) {</div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">const</span> uint32_t level_size = <span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(lvl.size());</div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  write(os, level_size);</div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Vector& pt : lvl) {</div> |
| <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  write(os, pt.data(), pt_size);</div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  }</div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span> }</div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  </div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a1c7a57911806d47ee3cebe9fad59f836"> 218</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::serialize</a>(<span class="keywordtype">unsigned</span> header_size_bytes) <span class="keyword">const</span> -> vector_bytes {</div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">const</span> uint8_t preamble_ints = (is_empty() ? PREAMBLE_INTS_SHORT : PREAMBLE_INTS_LONG);</div> |
| <div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  </div> |
| <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="comment">// pre-compute size</span></div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordtype">size_t</span> size = header_size_bytes + preamble_ints * <span class="keyword">sizeof</span>(uint32_t);</div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">if</span> (!is_empty())</div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Level& lvl : levels_)</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  size += <span class="keyword">sizeof</span>(uint32_t) + (lvl.size() * dim_ * <span class="keyword">sizeof</span>(T));</div> |
| <div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  </div> |
| <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  vector_bytes bytes(size, 0, levels_.get_allocator());</div> |
| <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  uint8_t* ptr = bytes.data() + header_size_bytes;</div> |
| <div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keyword">const</span> uint8_t* end_ptr = ptr + size;</div> |
| <div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  </div> |
| <div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  ptr += copy_to_mem(preamble_ints, ptr);</div> |
| <div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keyword">const</span> uint8_t ser_ver = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  ptr += copy_to_mem(ser_ver, ptr);</div> |
| <div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">const</span> uint8_t family = FAMILY_ID;</div> |
| <div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  ptr += copy_to_mem(family, ptr);</div> |
| <div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  </div> |
| <div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">// empty is the only valid flat</span></div> |
| <div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">const</span> uint8_t flags_byte = (is_empty() ? 1 << flags::IS_EMPTY : 0);</div> |
| <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  ptr += copy_to_mem(flags_byte, ptr);</div> |
| <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  ptr += copy_to_mem(k_, ptr);</div> |
| <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  ptr += <span class="keyword">sizeof</span>(uint16_t); <span class="comment">// 2 unused bytes</span></div> |
| <div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  ptr += copy_to_mem(dim_, ptr);</div> |
| <div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  </div> |
| <div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">if</span> (is_empty())</div> |
| <div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">return</span> bytes;</div> |
| <div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  </div> |
| <div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  ptr += copy_to_mem(num_retained_, ptr);</div> |
| <div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  ptr += copy_to_mem(n_, ptr);</div> |
| <div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  </div> |
| <div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="comment">// levels array -- uint32_t since a single level may be larger than k</span></div> |
| <div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordtype">size_t</span> pt_size = <span class="keyword">sizeof</span>(T) * dim_;</div> |
| <div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Level& lvl : levels_) {</div> |
| <div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  ptr += copy_to_mem(<span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(lvl.size()), ptr);</div> |
| <div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Vector& pt : lvl) {</div> |
| <div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  ptr += copy_to_mem(pt.data(), ptr, pt_size);</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>  }</div> |
| <div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  </div> |
| <div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span> (ptr != end_ptr)</div> |
| <div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Actual output size does not equal expected output size"</span>);</div> |
| <div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  </div> |
| <div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">return</span> bytes;</div> |
| <div class="line"><a name="l00263"></a><span class="lineno"> 263</span> }</div> |
| <div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  </div> |
| <div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A></a> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::deserialize</a>(std::istream& is, <span class="keyword">const</span> K& kernel, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keyword">const</span> <span class="keyword">auto</span> preamble_ints = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keyword">const</span> <span class="keyword">auto</span> serial_version = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">const</span> <span class="keyword">auto</span> family_id = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keyword">const</span> <span class="keyword">auto</span> flags_byte = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keyword">const</span> <span class="keyword">auto</span> k = read<uint16_t>(is);</div> |
| <div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  read<uint16_t>(is); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">const</span> <span class="keyword">auto</span> dim = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  </div> |
| <div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  check_k(k); <span class="comment">// do we have constraints?</span></div> |
| <div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  check_serial_version(serial_version); <span class="comment">// a little redundant with the header check</span></div> |
| <div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  check_family_id(family_id);</div> |
| <div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  check_header_validity(preamble_ints, flags_byte, serial_version);</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="keywordflow">if</span> (!is.good()) <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"error reading from std::istream"</span>);</div> |
| <div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_empty = (flags_byte & (1 << flags::IS_EMPTY)) > 0;</div> |
| <div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span> (is_empty) {</div> |
| <div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">return</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch</a>(k, dim, kernel, allocator);</div> |
| <div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div> |
| <div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  </div> |
| <div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">const</span> <span class="keyword">auto</span> num_retained = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">const</span> <span class="keyword">auto</span> n = read<uint64_t>(is);</div> |
| <div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  </div> |
| <div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// levels arrays</span></div> |
| <div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordtype">size_t</span> pt_size = <span class="keyword">sizeof</span>(T) * dim;</div> |
| <div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  Levels levels(allocator);</div> |
| <div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  int64_t num_to_read = num_retained; <span class="comment">// num_retrained is uint32_t so this allows error checking</span></div> |
| <div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">while</span> (num_to_read > 0) {</div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">const</span> <span class="keyword">auto</span> level_size = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  Level lvl(allocator);</div> |
| <div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  lvl.reserve(level_size);</div> |
| <div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < level_size; ++i) {</div> |
| <div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  Vector pt(dim, 0, allocator);</div> |
| <div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  read(is, pt.data(), pt_size);</div> |
| <div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  lvl.push_back(pt);</div> |
| <div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  }</div> |
| <div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  levels.push_back(lvl);</div> |
| <div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  num_to_read -= lvl.size();</div> |
| <div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  }</div> |
| <div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  </div> |
| <div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">if</span> (num_to_read != 0)</div> |
| <div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Error deserializing sketch: Incorrect number of items read"</span>);</div> |
| <div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span> (!is.good()) <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"error reading from std::istream"</span>);</div> |
| <div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  </div> |
| <div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">return</span> density_sketch(k, dim, num_retained, n, std::move(levels), kernel);</div> |
| <div class="line"><a name="l00311"></a><span class="lineno"> 311</span> }</div> |
| <div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  </div> |
| <div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00314"></a><span class="lineno"> 314</span> density_sketch<T, K, A> <a class="code" href="classdatasketches_1_1density__sketch.html#ae1111c0a71921687c58dd661a3c341e2">density_sketch<T, K, A>::deserialize</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* bytes, <span class="keywordtype">size_t</span> size, <span class="keyword">const</span> K& kernel, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  ensure_minimum_memory(size, PREAMBLE_INTS_SHORT * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* ptr = <span class="keyword">static_cast<</span><span class="keyword">const </span><span class="keywordtype">char</span>*<span class="keyword">></span>(bytes);</div> |
| <div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* end_ptr = <span class="keyword">static_cast<</span><span class="keyword">const </span><span class="keywordtype">char</span>*<span class="keyword">></span>(bytes) + size;</div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  uint8_t preamble_ints;</div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  ptr += copy_from_mem(ptr, preamble_ints);</div> |
| <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  uint8_t serial_version;</div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  ptr += copy_from_mem(ptr, serial_version);</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  uint8_t family_id;</div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  ptr += copy_from_mem(ptr, family_id);</div> |
| <div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  uint8_t flags_byte;</div> |
| <div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  ptr += copy_from_mem(ptr, flags_byte);</div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  uint16_t k;</div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ptr += copy_from_mem(ptr, k);</div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  uint16_t unused;</div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  ptr += copy_from_mem(ptr, unused);</div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  uint32_t dim;</div> |
| <div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  ptr += copy_from_mem(ptr, dim);</div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  </div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  check_k(k);</div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  check_serial_version(serial_version); <span class="comment">// a little redundant with the header check</span></div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  check_family_id(family_id);</div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  check_header_validity(preamble_ints, flags_byte, serial_version);</div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  </div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_empty = (flags_byte & (1 << flags::IS_EMPTY)) > 0;</div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keywordflow">if</span> (is_empty) {</div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">return</span> density_sketch(k, dim, kernel, allocator);</div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  }</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>  ensure_minimum_memory(size, PREAMBLE_INTS_LONG * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  uint32_t num_retained;</div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  ptr += copy_from_mem(ptr, num_retained);</div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  uint64_t n;</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  ptr += copy_from_mem(ptr, n);</div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  </div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="comment">// Predicting the number of levels seems hard so determining the exact remaining</span></div> |
| <div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="comment">// size is also hard. But we need at least num_retained * dim * sizeof(T)</span></div> |
| <div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">// bytes for the points so we can check that.</span></div> |
| <div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordtype">size_t</span> pt_size = <span class="keyword">sizeof</span>(T) * dim;</div> |
| <div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  ensure_minimum_memory(end_ptr - ptr, num_retained * pt_size);</div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  </div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="comment">// levels arrays</span></div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  Levels levels(allocator);</div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  int64_t num_to_read = num_retained; <span class="comment">// num_retained is uint32_t so this allows error checking</span></div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">while</span> (num_to_read > 0) {</div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  uint32_t level_size;</div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  ptr += copy_from_mem(ptr, level_size);</div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  ensure_minimum_memory(end_ptr - ptr, level_size * pt_size);</div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  Level lvl(allocator);</div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  lvl.reserve(level_size);</div> |
| <div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < level_size; ++i) {</div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  Vector pt(dim, 0, allocator);</div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  ptr += copy_from_mem(ptr, pt.data(), pt_size);</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  lvl.push_back(pt);</div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  }</div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  levels.push_back(lvl);</div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  num_to_read -= lvl.size();</div> |
| <div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  }</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>  <span class="keywordflow">if</span> (num_to_read != 0)</div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Error deserializing sketch: Incorrect number of items read"</span>);</div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> (ptr > end_ptr) <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Error deserializing sketch: Read beyond provided memory"</span>);</div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  </div> |
| <div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">return</span> density_sketch(k, dim, num_retained, n, std::move(levels), kernel);</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span> }</div> |
| <div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  </div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="keywordtype">void</span> density_sketch<T, K, A>::check_k(uint16_t k) {</div> |
| <div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">if</span> (k < 2)</div> |
| <div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"k must be > 1. Found: "</span> + std::to_string(k));</div> |
| <div class="line"><a name="l00384"></a><span class="lineno"> 384</span> }</div> |
| <div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  </div> |
| <div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="keywordtype">void</span> density_sketch<T, K, A>::check_serial_version(uint8_t serial_version) {</div> |
| <div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">if</span> (serial_version == SERIAL_VERSION)</div> |
| <div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption. Unrecognized serialization version: "</span> + std::to_string(serial_version));</div> |
| <div class="line"><a name="l00392"></a><span class="lineno"> 392</span> }</div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  </div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="keywordtype">void</span> density_sketch<T, K, A>::check_family_id(uint8_t family_id) {</div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">if</span> (family_id == FAMILY_ID)</div> |
| <div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption. Family id does not indicate density sketch: "</span> + std::to_string(family_id));</div> |
| <div class="line"><a name="l00400"></a><span class="lineno"> 400</span> }</div> |
| <div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  </div> |
| <div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="keywordtype">void</span> density_sketch<T, K, A>::check_header_validity(uint8_t preamble_ints, uint8_t flags_byte, uint8_t serial_version) {</div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> empty = (flags_byte & (1 << flags::IS_EMPTY)) > 0;</div> |
| <div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  </div> |
| <div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">if</span> ((empty && preamble_ints == PREAMBLE_INTS_SHORT)</div> |
| <div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  || (!empty && preamble_ints == PREAMBLE_INTS_LONG))</div> |
| <div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  std::ostringstream os;</div> |
| <div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  os << <span class="stringliteral">"Possible sketch corruption. Inconsistent state: "</span></div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  << <span class="stringliteral">"preamble_ints = "</span> << preamble_ints</div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  << <span class="stringliteral">", empty = "</span> << (empty ? <span class="stringliteral">"true"</span> : <span class="stringliteral">"false"</span>)</div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  << <span class="stringliteral">", serialization_version = "</span> << serial_version;</div> |
| <div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">throw</span> std::invalid_argument(os.str());</div> |
| <div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div> |
| <div class="line"><a name="l00417"></a><span class="lineno"> 417</span> }</div> |
| <div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  </div> |
| <div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00420"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#a592a7af55659ff803b26a45552a68dda"> 420</a></span> string<A> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::to_string</a>(<span class="keywordtype">bool</span> print_levels, <span class="keywordtype">bool</span> print_items)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="comment">// Using a temporary stream for implementation here does not comply with AllocatorAwareContainer requirements.</span></div> |
| <div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="comment">// The stream does not support passing an allocator instance, and alternatives are complicated.</span></div> |
| <div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  std::ostringstream os;</div> |
| <div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  os << <span class="stringliteral">"### Density sketch summary:"</span> << std::endl;</div> |
| <div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  os << <span class="stringliteral">" K : "</span> << k_ << std::endl;</div> |
| <div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  os << <span class="stringliteral">" Dim : "</span> << dim_ << std::endl;</div> |
| <div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  os << <span class="stringliteral">" Empty : "</span> << (is_empty() ? <span class="stringliteral">"true"</span> : <span class="stringliteral">"false"</span>) << std::endl;</div> |
| <div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  os << <span class="stringliteral">" N : "</span> << n_ << std::endl;</div> |
| <div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  os << <span class="stringliteral">" Retained items : "</span> << num_retained_ << std::endl;</div> |
| <div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  os << <span class="stringliteral">" Estimation mode: "</span> << (is_estimation_mode() ? <span class="stringliteral">"true"</span> : <span class="stringliteral">"false"</span>) << std::endl;</div> |
| <div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  os << <span class="stringliteral">" Levels : "</span> << levels_.size() << std::endl;</div> |
| <div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  os << <span class="stringliteral">"### End sketch summary"</span> << std::endl;</div> |
| <div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  </div> |
| <div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">if</span> (print_levels) {</div> |
| <div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  os << <span class="stringliteral">"### Density sketch levels:"</span> << std::endl;</div> |
| <div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  os << <span class="stringliteral">" height: size"</span> << std::endl;</div> |
| <div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> height = 0; height < levels_.size(); ++height) {</div> |
| <div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  os << <span class="stringliteral">" "</span> << height << <span class="stringliteral">": "</span></div> |
| <div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  << levels_[height].size() << std::endl;</div> |
| <div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  }</div> |
| <div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  os << <span class="stringliteral">"### End sketch levels"</span> << std::endl;</div> |
| <div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  }</div> |
| <div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  </div> |
| <div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span> (print_items) {</div> |
| <div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  os << <span class="stringliteral">"### Density sketch data:"</span> << std::endl;</div> |
| <div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> height = 0; height < levels_.size(); ++height) {</div> |
| <div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  os << <span class="stringliteral">" level "</span> << height << <span class="stringliteral">": "</span> << std::endl;</div> |
| <div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& point: levels_[height]) {</div> |
| <div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  os << <span class="stringliteral">" ["</span>;</div> |
| <div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordtype">bool</span> first = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> value: point) {</div> |
| <div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="keywordflow">if</span> (first) {</div> |
| <div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  first = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  os << <span class="stringliteral">", "</span>;</div> |
| <div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div> |
| <div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  os << value;</div> |
| <div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div> |
| <div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  os << <span class="stringliteral">"]"</span> << std::endl;</div> |
| <div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  }</div> |
| <div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  }</div> |
| <div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  os << <span class="stringliteral">"### End sketch data"</span> << std::endl;</div> |
| <div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  }</div> |
| <div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> string<A>(os.str().c_str(), levels_.get_allocator());</div> |
| <div class="line"><a name="l00465"></a><span class="lineno"> 465</span> }</div> |
| <div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  </div> |
| <div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00468"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ad5c959a538216a09ab28c5283585956c"> 468</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::begin</a>() const -> const_iterator {</div> |
| <div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">return</span> const_iterator(levels_.begin(), levels_.end());</div> |
| <div class="line"><a name="l00470"></a><span class="lineno"> 470</span> }</div> |
| <div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  </div> |
| <div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00473"></a><span class="lineno"><a class="line" href="classdatasketches_1_1density__sketch.html#ae11e60e117300685401961e36f196f7a"> 473</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::end</a>() const -> const_iterator {</div> |
| <div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keywordflow">return</span> const_iterator(levels_.end(), levels_.end());</div> |
| <div class="line"><a name="l00475"></a><span class="lineno"> 475</span> }</div> |
| <div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  </div> |
| <div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment">// iterator</span></div> |
| <div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  </div> |
| <div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <a class="code" href="classdatasketches_1_1density__sketch.html">density_sketch<T, K, A>::const_iterator::const_iterator</a>(LevelsIterator begin, LevelsIterator end):</div> |
| <div class="line"><a name="l00481"></a><span class="lineno"> 481</span> levels_it_(begin),</div> |
| <div class="line"><a name="l00482"></a><span class="lineno"> 482</span> levels_end_(end),</div> |
| <div class="line"><a name="l00483"></a><span class="lineno"> 483</span> level_it_(),</div> |
| <div class="line"><a name="l00484"></a><span class="lineno"> 484</span> height_(0)</div> |
| <div class="line"><a name="l00485"></a><span class="lineno"> 485</span> {</div> |
| <div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="comment">// skip empty levels</span></div> |
| <div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordflow">while</span> (levels_it_ != levels_end_) {</div> |
| <div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  level_it_ = levels_it_->begin();</div> |
| <div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">if</span> (level_it_ != levels_it_->end()) <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  ++levels_it_;</div> |
| <div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  ++height_;</div> |
| <div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  }</div> |
| <div class="line"><a name="l00493"></a><span class="lineno"> 493</span> }</div> |
| <div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  </div> |
| <div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="keyword">auto</span> density_sketch<T, K, A>::const_iterator::operator++() -> const_iterator& {</div> |
| <div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  ++level_it_;</div> |
| <div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordflow">if</span> (level_it_ == levels_it_->end()) {</div> |
| <div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  ++levels_it_;</div> |
| <div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  ++height_;</div> |
| <div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="comment">// skip empty levels</span></div> |
| <div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">while</span> (levels_it_ != levels_end_) {</div> |
| <div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  level_it_ = levels_it_->begin();</div> |
| <div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordflow">if</span> (level_it_ != levels_it_->end()) <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  ++levels_it_;</div> |
| <div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  ++height_;</div> |
| <div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  }</div> |
| <div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  }</div> |
| <div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div> |
| <div class="line"><a name="l00510"></a><span class="lineno"> 510</span> }</div> |
| <div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  </div> |
| <div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="keyword">auto</span> density_sketch<T, K, A>::const_iterator::operator++(<span class="keywordtype">int</span>) -> const_iterator& {</div> |
| <div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  const_iterator tmp(*<span class="keyword">this</span>);</div> |
| <div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  operator++();</div> |
| <div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">return</span> tmp;</div> |
| <div class="line"><a name="l00517"></a><span class="lineno"> 517</span> }</div> |
| <div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  </div> |
| <div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="keywordtype">bool</span> density_sketch<T, K, A>::const_iterator::operator==(<span class="keyword">const</span> const_iterator& other)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="keywordflow">if</span> (levels_it_ != other.levels_it_) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keywordflow">if</span> (levels_it_ == levels_end_) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">return</span> level_it_ == other.level_it_;</div> |
| <div class="line"><a name="l00524"></a><span class="lineno"> 524</span> }</div> |
| <div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  </div> |
| <div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="keywordtype">bool</span> density_sketch<T, K, A>::const_iterator::operator!=(<span class="keyword">const</span> const_iterator& other)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keywordflow">return</span> !operator==(other);</div> |
| <div class="line"><a name="l00529"></a><span class="lineno"> 529</span> }</div> |
| <div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  </div> |
| <div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="keyword">auto</span> density_sketch<T, K, A>::const_iterator::operator*() const -> const value_type {</div> |
| <div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keywordflow">return</span> value_type(*level_it_, 1ULL << height_);</div> |
| <div class="line"><a name="l00534"></a><span class="lineno"> 534</span> }</div> |
| <div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  </div> |
| <div class="line"><a name="l00536"></a><span class="lineno"> 536</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> K, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="keyword">auto</span> density_sketch<T, K, A>::const_iterator::operator->() const -> const return_value_holder<value_type> {</div> |
| <div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordflow">return</span> **<span class="keyword">this</span>;</div> |
| <div class="line"><a name="l00539"></a><span class="lineno"> 539</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> } <span class="comment">/* namespace datasketches */</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="preprocessor">#endif</span></div> |
| <div class="ttc" id="aclassdatasketches_1_1density__sketch_html"><div class="ttname"><a href="classdatasketches_1_1density__sketch.html">datasketches::density_sketch</a></div><div class="ttdoc">Density sketch.</div><div class="ttdef"><b>Definition:</b> density_sketch.hpp:57</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1density__sketch_html_a08daaa6a0d62a61b612a0dbbbd0b22d5"><div class="ttname"><a href="classdatasketches_1_1density__sketch.html#a08daaa6a0d62a61b612a0dbbbd0b22d5">datasketches::density_sketch::density_sketch</a></div><div class="ttdeci">density_sketch(uint16_t k, uint32_t dim, const Kernel &kernel=Kernel(), const Allocator &allocator=Allocator())</div><div class="ttdoc">Constructor.</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1density__sketch_html_a9d85cf47c4ecd0580ec623c42006dd1b"><div class="ttname"><a href="classdatasketches_1_1density__sketch.html#a9d85cf47c4ecd0580ec623c42006dd1b">datasketches::density_sketch::get_allocator</a></div><div class="ttdeci">Allocator get_allocator() const</div><div class="ttdoc">Returns an instance of the allocator for this sketch.</div><div class="ttdef"><b>Definition:</b> density_sketch_impl.hpp:127</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1density__sketch_html_ae1111c0a71921687c58dd661a3c341e2"><div class="ttname"><a href="classdatasketches_1_1density__sketch.html#ae1111c0a71921687c58dd661a3c341e2">datasketches::density_sketch< T, K, A >::deserialize</a></div><div class="ttdeci">static density_sketch deserialize(std::istream &is, const K &kernel=K(), const A &allocator=A())</div><div class="ttdoc">This method deserializes a sketch from a given stream.</div></div> |
| <div class="ttc" id="anamespacedatasketches_html"><div class="ttname"><a href="namespacedatasketches.html">datasketches</a></div><div class="ttdoc">DataSketches namespace.</div><div class="ttdef"><b>Definition:</b> binomial_bounds.hpp:38</div></div> |
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