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| <li class="navelem"><a class="el" href="dir_82f3a10095a8f2296c0cf5c491a57b02.html">cpc</a></li><li class="navelem"><a class="el" href="dir_fabb7854c43508dcbf81254d1daad42f.html">include</a></li> </ul> |
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| <div class="title">cpc_sketch_impl.hpp</div> </div> |
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| <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * 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 CPC_SKETCH_IMPL_HPP_</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define CPC_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 <stdexcept></span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <cmath></span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <cstring></span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <sstream></span></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "cpc_confidence.hpp"</span></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "kxp_byte_lookup.hpp"</span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "inv_pow2_table.hpp"</span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "cpc_util.hpp"</span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "icon_estimator.hpp"</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "serde.hpp"</span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "count_zeros.hpp"</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span><a class="code" href="namespacedatasketches.html">datasketches</a> {</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="namespacedatasketches.html#a3a7ac5efb6156547a8da91e937a06b07"> 39</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacedatasketches.html#a3a7ac5efb6156547a8da91e937a06b07">cpc_init</a>() {</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  get_compressor<A>(); <span class="comment">// this initializes a global static instance of the compressor on the first use</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>  </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a39d6cd5eff1a9af78f58108ba5297b47"> 44</a></span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a39d6cd5eff1a9af78f58108ba5297b47">cpc_sketch_alloc<A>::cpc_sketch_alloc</a>(uint8_t lg_k, uint64_t seed, <span class="keyword">const</span> A& allocator):</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> lg_k(lg_k),</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> seed(seed),</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> was_merged(false),</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> num_coupons(0),</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> surprising_value_table(2, 6 + lg_k, allocator),</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> sliding_window(allocator),</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> window_offset(0),</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> first_interesting_column(0),</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> kxp(1 << lg_k),</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> hip_est_accum(0)</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>  check_lg_k(lg_k);</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a9d85cf47c4ecd0580ec623c42006dd1b"> 60</a></span> A <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a9d85cf47c4ecd0580ec623c42006dd1b">cpc_sketch_alloc<A>::get_allocator</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> sliding_window.get_allocator();</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a8f8b2691781d682411a6de23996a8be2"> 65</a></span> uint8_t <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a8f8b2691781d682411a6de23996a8be2">cpc_sketch_alloc<A>::get_lg_k</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> lg_k;</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>  </div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a5a2b7a58dc85678d08752945ff655362"> 70</a></span> <span class="keywordtype">bool</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a5a2b7a58dc85678d08752945ff655362">cpc_sketch_alloc<A>::is_empty</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> num_coupons == 0;</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="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a2afb71f2ef2d82290be4c8eafc08f2a2"> 75</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a2afb71f2ef2d82290be4c8eafc08f2a2">cpc_sketch_alloc<A>::get_estimate</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (!was_merged) <span class="keywordflow">return</span> get_hip_estimate();</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> get_icon_estimate();</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc<A>::get_hip_estimate</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> hip_est_accum;</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> }</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keywordtype">double</span> cpc_sketch_alloc<A>::get_icon_estimate()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> compute_icon_estimate(lg_k, num_coupons);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> }</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  </div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#ab43d2075a173e631d757b07da971fe3d"> 91</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#ab43d2075a173e631d757b07da971fe3d">cpc_sketch_alloc<A>::get_lower_bound</a>(<span class="keywordtype">unsigned</span> kappa)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">if</span> (kappa < 1 || kappa > 3) {</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"kappa must be 1, 2 or 3"</span>);</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (!was_merged) <span class="keywordflow">return</span> get_hip_confidence_lb<A>(*<span class="keyword">this</span>, kappa);</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> get_icon_confidence_lb<A>(*<span class="keyword">this</span>, kappa);</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> }</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  </div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#adbfa99fa21d0f4acb1ba00ced8d8d858"> 100</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#adbfa99fa21d0f4acb1ba00ced8d8d858">cpc_sketch_alloc<A>::get_upper_bound</a>(<span class="keywordtype">unsigned</span> kappa)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (kappa < 1 || kappa > 3) {</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"kappa must be 1, 2 or 3"</span>);</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> (!was_merged) <span class="keywordflow">return</span> get_hip_confidence_ub<A>(*<span class="keyword">this</span>, kappa);</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> get_icon_confidence_ub<A>(*<span class="keyword">this</span>, kappa);</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea"> 109</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(<span class="keyword">const</span> std::string& value) {</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (value.empty()) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  update(value.c_str(), value.length());</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> A></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a5b93b5a6538ec1469b935b7d7d7bb283"> 115</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(uint64_t value) {</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  update(&value, <span class="keyword">sizeof</span>(value));</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a564bbb006542c4aabc7224cab656a19c"> 120</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(int64_t value) {</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  update(&value, <span class="keyword">sizeof</span>(value));</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span> }</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#ab2369f0601666529b55d360fb446ae26"> 125</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(uint32_t value) {</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  update(<span class="keyword">static_cast<</span>int32_t<span class="keyword">></span>(value));</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>  </div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#ac54bdfccda98627655515ebf1af3c3d1"> 130</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(int32_t value) {</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  update(<span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(value));</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  </div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#af827db22dd732a88c95e6360694074a8"> 135</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(uint16_t value) {</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  update(<span class="keyword">static_cast<</span>int16_t<span class="keyword">></span>(value));</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a0708ab5df4e334c94e2a732aa3af3c22"> 140</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(int16_t value) {</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  update(<span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(value));</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> }</div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#af7a5abc1ee9ff44b2801ea7fe62121f8"> 145</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(uint8_t value) {</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  update(<span class="keyword">static_cast<</span>int8_t<span class="keyword">></span>(value));</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span> }</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  </div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#aee10d3fc511a791148f520a0a23c813a"> 150</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(int8_t value) {</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  update(<span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(value));</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>  </div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a636ac10cf089a9ab3ea89ae51377da9d"> 155</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(<span class="keywordtype">double</span> value) {</div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">union </span>{</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  int64_t long_value;</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">double</span> double_value;</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  } ldu;</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span> (value == 0.0) {</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  ldu.double_value = 0.0; <span class="comment">// canonicalize -0.0 to 0.0</span></div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (std::isnan(value)) {</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  ldu.long_value = 0x7ff8000000000000L; <span class="comment">// canonicalize NaN using value from Java's Double.doubleToLongBits()</span></div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  ldu.double_value = value;</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>  update(&ldu, <span class="keyword">sizeof</span>(ldu));</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> }</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  </div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00171"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a84fc45726550c65b8b21fae8bf572014"> 171</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(<span class="keywordtype">float</span> value) {</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  update(<span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(value));</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span> }</div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  </div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t row_col_from_two_hashes(uint64_t hash0, uint64_t hash1, uint8_t lg_k) {</div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">if</span> (lg_k > 26) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"lg_k > 26"</span>);</div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  uint8_t col = count_leading_zeros_in_u64(hash1); <span class="comment">// 0 <= col <= 64</span></div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (col > 63) col = 63; <span class="comment">// clip so that 0 <= col <= 63</span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">const</span> uint32_t row = hash0 & (k - 1);</div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  uint32_t row_col = (row << 6) | col;</div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// To avoid the hash table's "empty" value, we change the row of the following pair.</span></div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// This case is extremely unlikely, but we might as well handle it.</span></div> |
| <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> (row_col == UINT32_MAX) row_col ^= 1 << 6;</div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> row_col;</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="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00189"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#ab3f986e7149117648be6a0c53250208c"> 189</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">cpc_sketch_alloc<A>::update</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* value, <span class="keywordtype">size_t</span> size) {</div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  HashState hashes;</div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  MurmurHash3_x64_128(value, size, seed, hashes);</div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  row_col_update(row_col_from_two_hashes(hashes.h1, hashes.h2, lg_k));</div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> }</div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  </div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc<A>::row_col_update</a>(uint32_t row_col) {</div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keyword">const</span> uint8_t col = row_col & 63;</div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> (col < first_interesting_column) <span class="keywordflow">return</span>; <span class="comment">// important speed optimization</span></div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// window size is 0 until sketch is promoted from sparse to windowed</span></div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (sliding_window.size() == 0) {</div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  update_sparse(row_col);</div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  update_windowed(row_col);</div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</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>  </div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::update_sparse(uint32_t row_col) {</div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">const</span> uint64_t c32pre = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 5;</div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (c32pre >= 3 * k) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"c32pre >= 3 * k"</span>); <span class="comment">// C < 3K/32, in other words flavor == SPARSE</span></div> |
| <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordtype">bool</span> is_novel = surprising_value_table.maybe_insert(row_col);</div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> (is_novel) {</div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  num_coupons++;</div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  update_hip(row_col);</div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keyword">const</span> uint64_t c32post = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 5;</div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">if</span> (c32post >= 3 * k) promote_sparse_to_windowed(); <span class="comment">// C >= 3K/32</span></div> |
| <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span> }</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">// the flavor is HYBRID, PINNED, or SLIDING</span></div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::update_windowed(uint32_t row_col) {</div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">if</span> (window_offset > 56) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"wrong window offset"</span>);</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">const</span> uint64_t c32pre = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 5;</div> |
| <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (c32pre < 3 * k) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"c32pre < 3 * k"</span>); <span class="comment">// C < 3K/32, in other words flavor >= HYBRID</span></div> |
| <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">const</span> uint64_t c8pre = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 3;</div> |
| <div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keyword">const</span> uint64_t w8pre = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(window_offset) << 3;</div> |
| <div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">if</span> (c8pre >= (27 + w8pre) * k) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"c8pre is wrong"</span>); <span class="comment">// C < (K * 27/8) + (K * window_offset)</span></div> |
| <div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  </div> |
| <div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordtype">bool</span> is_novel = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">const</span> uint8_t col = row_col & 63;</div> |
| <div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  </div> |
| <div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">if</span> (col < window_offset) { <span class="comment">// track the surprising 0's "before" the window</span></div> |
| <div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  is_novel = surprising_value_table.maybe_delete(row_col); <span class="comment">// inverted logic</span></div> |
| <div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (col < window_offset + 8) { <span class="comment">// track the 8 bits inside the window</span></div> |
| <div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (col < window_offset) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"col < window_offset"</span>);</div> |
| <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">const</span> uint32_t row = row_col >> 6;</div> |
| <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">const</span> uint8_t old_bits = sliding_window[row];</div> |
| <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">const</span> uint8_t new_bits = old_bits | (1 << (col - window_offset));</div> |
| <div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (new_bits != old_bits) {</div> |
| <div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  sliding_window[row] = new_bits;</div> |
| <div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  is_novel = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div> |
| <div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  } <span class="keywordflow">else</span> { <span class="comment">// track the surprising 1's "after" the window</span></div> |
| <div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (col < window_offset + 8) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"col < window_offset + 8"</span>);</div> |
| <div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  is_novel = surprising_value_table.maybe_insert(row_col); <span class="comment">// normal logic</span></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>  </div> |
| <div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">if</span> (is_novel) {</div> |
| <div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  num_coupons++;</div> |
| <div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  update_hip(row_col);</div> |
| <div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keyword">const</span> uint64_t c8post = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 3;</div> |
| <div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">if</span> (c8post >= (27 + w8pre) * k) {</div> |
| <div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  move_window();</div> |
| <div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (window_offset < 1 || window_offset > 56) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"wrong window offset"</span>);</div> |
| <div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">const</span> uint64_t w8post = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(window_offset) << 3;</div> |
| <div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span> (c8post >= (27 + w8post) * k) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"c8pre is wrong"</span>); <span class="comment">// C < (K * 27/8) + (K * window_offset)</span></div> |
| <div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div> |
| <div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div> |
| <div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div> |
| <div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div> |
| <div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment">// Call this whenever a new coupon has been collected.</span></div> |
| <div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::update_hip(uint32_t row_col) {</div> |
| <div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keyword">const</span> uint8_t col = row_col & 63;</div> |
| <div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> one_over_p = <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(k) / kxp;</div> |
| <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  hip_est_accum += one_over_p;</div> |
| <div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  kxp -= INVERSE_POWERS_OF_2[col + 1]; <span class="comment">// notice the "+1"</span></div> |
| <div class="line"><a name="l00272"></a><span class="lineno"> 272</span> }</div> |
| <div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  </div> |
| <div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment">// In terms of flavor, this promotes SPARSE to HYBRID</span></div> |
| <div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::promote_sparse_to_windowed() {</div> |
| <div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">const</span> uint64_t c32 = <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(num_coupons) << 5;</div> |
| <div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">if</span> (!(c32 == 3 * k || (lg_k == 4 && c32 > 3 * k))) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"wrong c32"</span>);</div> |
| <div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  </div> |
| <div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  sliding_window.resize(k, 0); <span class="comment">// zero the memory (because we will be OR'ing into it)</span></div> |
| <div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  </div> |
| <div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  u32_table<A> new_table(2, 6 + lg_k, sliding_window.get_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>  <span class="keyword">const</span> uint32_t* old_slots = surprising_value_table.get_slots();</div> |
| <div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">const</span> uint32_t old_num_slots = 1 << surprising_value_table.get_lg_size();</div> |
| <div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  </div> |
| <div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> (window_offset != 0) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"window_offset != 0"</span>);</div> |
| <div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  </div> |
| <div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < old_num_slots; i++) {</div> |
| <div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keyword">const</span> uint32_t row_col = old_slots[i];</div> |
| <div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">if</span> (row_col != UINT32_MAX) {</div> |
| <div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keyword">const</span> uint8_t col = row_col & 63;</div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span> (col < 8) {</div> |
| <div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keyword">const</span> uint32_t row = row_col >> 6;</div> |
| <div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  sliding_window[row] |= 1 << col;</div> |
| <div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// cannot use u32_table::must_insert(), because it doesn't provide for growth</span></div> |
| <div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_novel = new_table.maybe_insert(row_col);</div> |
| <div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">if</span> (!is_novel) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"is_novel != true"</span>);</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>  }</div> |
| <div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  }</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>  surprising_value_table = std::move(new_table);</div> |
| <div class="line"><a name="l00306"></a><span class="lineno"> 306</span> }</div> |
| <div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  </div> |
| <div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::move_window() {</div> |
| <div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keyword">const</span> uint8_t new_offset = window_offset + 1;</div> |
| <div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">if</span> (new_offset > 56) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"new_offset > 56"</span>);</div> |
| <div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">if</span> (new_offset != determine_correct_offset(lg_k, num_coupons)) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"new_offset is wrong"</span>);</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>  <span class="keywordflow">if</span> (sliding_window.size() == 0) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"no sliding window"</span>);</div> |
| <div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</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">// Construct the full-sized bit matrix that corresponds to the sketch</span></div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  vector_u64 bit_matrix = build_bit_matrix();</div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  </div> |
| <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="comment">// refresh the KXP register on every 8th window shift.</span></div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> ((new_offset & 0x7) == 0) refresh_kxp(bit_matrix.data());</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  </div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  surprising_value_table.clear(); <span class="comment">// the new number of surprises will be about the same</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="keyword">const</span> uint64_t mask_for_clearing_window = (<span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(0xff) << new_offset) ^ UINT64_MAX;</div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">const</span> uint64_t mask_for_flipping_early_zone = (<span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(1) << new_offset) - 1;</div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  uint64_t all_surprises_ored = 0;</div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  </div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < k; i++) {</div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  uint64_t pattern = bit_matrix[i];</div> |
| <div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  sliding_window[i] = (pattern >> new_offset) & 0xff;</div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  pattern &= mask_for_clearing_window;</div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="comment">// The following line converts surprising 0's to 1's in the "early zone",</span></div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="comment">// (and vice versa, which is essential for this procedure's O(k) time cost).</span></div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  pattern ^= mask_for_flipping_early_zone;</div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  all_surprises_ored |= pattern; <span class="comment">// a cheap way to recalculate first_interesting_column</span></div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keywordflow">while</span> (pattern != 0) {</div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">const</span> uint8_t col = count_trailing_zeros_in_u64(pattern);</div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  pattern = pattern ^ (<span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(1) << col); <span class="comment">// erase the 1</span></div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keyword">const</span> uint32_t row_col = (i << 6) | col;</div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_novel = surprising_value_table.maybe_insert(row_col);</div> |
| <div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">if</span> (!is_novel) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"is_novel != true"</span>);</div> |
| <div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div> |
| <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  }</div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  </div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  window_offset = new_offset;</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  </div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  first_interesting_column = count_trailing_zeros_in_u64(all_surprises_ored);</div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">if</span> (first_interesting_column > new_offset) first_interesting_column = new_offset; <span class="comment">// corner case</span></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> <span class="comment">// The KXP register is a double with roughly 50 bits of precision, but</span></div> |
| <div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment">// it might need roughly 90 bits to track the value with perfect accuracy.</span></div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment">// Therefore we recalculate KXP occasionally from the sketch's full bitmatrix</span></div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">// so that it will reflect changes that were previously outside the mantissa.</span></div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::refresh_kxp(<span class="keyword">const</span> uint64_t* bit_matrix) {</div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  </div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="comment">// for improved numerical accuracy, we separately sum the bytes of the U64's</span></div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordtype">double</span> byte_sums[8]; <span class="comment">// allocating on the stack</span></div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  std::fill(byte_sums, byte_sums + 8, 0);</div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  </div> |
| <div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < k; i++) {</div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  uint64_t word = bit_matrix[i];</div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; j < 8; j++) {</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keyword">const</span> uint8_t <span class="keywordtype">byte</span> = word & 0xff;</div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  byte_sums[j] += KXP_BYTE_TABLE[byte];</div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  word >>= 8;</div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  }</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="keywordtype">double</span> total = 0.0;</div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 7; j >= 0; j--) { <span class="comment">// the reverse order is important</span></div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> factor = INVERSE_POWERS_OF_2[8 * j]; <span class="comment">// pow (256.0, (-1.0 * ((double) j)));</span></div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  total += factor * byte_sums[j];</div> |
| <div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  </div> |
| <div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  kxp = total;</div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00383"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#aed372241c10ffd041bee85602edb199a"> 383</a></span> string<A> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#aed372241c10ffd041bee85602edb199a">cpc_sketch_alloc<A>::to_string</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">// Using a temporary stream for implementation here does not comply with AllocatorAwareContainer requirements.</span></div> |
| <div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="comment">// The stream does not support passing an allocator instance, and alternatives are complicated.</span></div> |
| <div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  std::ostringstream os;</div> |
| <div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  os << <span class="stringliteral">"### CPC sketch summary:"</span> << std::endl;</div> |
| <div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  os << <span class="stringliteral">" lg_k : "</span> << std::to_string(lg_k) << std::endl;</div> |
| <div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  os << <span class="stringliteral">" seed hash : "</span> << std::hex << compute_seed_hash(seed) << std::dec << std::endl;</div> |
| <div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  os << <span class="stringliteral">" C : "</span> << num_coupons << std::endl;</div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  os << <span class="stringliteral">" flavor : "</span> << determine_flavor() << std::endl;</div> |
| <div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  os << <span class="stringliteral">" merged : "</span> << (was_merged ? <span class="stringliteral">"true"</span> : <span class="stringliteral">"false"</span>) << std::endl;</div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">if</span> (!was_merged) {</div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  os << <span class="stringliteral">" HIP estimate : "</span> << hip_est_accum << std::endl;</div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  os << <span class="stringliteral">" kxp : "</span> << kxp << std::endl;</div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  }</div> |
| <div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  os << <span class="stringliteral">" interesting col: "</span> << std::to_string(first_interesting_column) << std::endl;</div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  os << <span class="stringliteral">" table entries : "</span> << surprising_value_table.get_num_items() << std::endl;</div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  os << <span class="stringliteral">" window : "</span> << (sliding_window.size() == 0 ? <span class="stringliteral">"not "</span> : <span class="stringliteral">""</span>) << <span class="stringliteral">"allocated"</span> << std::endl;</div> |
| <div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordflow">if</span> (sliding_window.size() > 0) {</div> |
| <div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  os << <span class="stringliteral">" window offset : "</span> << std::to_string(window_offset) << std::endl;</div> |
| <div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div> |
| <div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  os << <span class="stringliteral">"### End sketch summary"</span> << std::endl;</div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">return</span> string<A>(os.str().c_str(), sliding_window.get_allocator());</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>  </div> |
| <div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00408"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924"> 408</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924">cpc_sketch_alloc<A>::serialize</a>(std::ostream& os)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  compressed_state<A> compressed(A(sliding_window.get_allocator()));</div> |
| <div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  compressed.table_data_words = 0;</div> |
| <div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  compressed.table_num_entries = 0;</div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  compressed.window_data_words = 0;</div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  get_compressor<A>().compress(*<span class="keyword">this</span>, compressed);</div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_hip = !was_merged;</div> |
| <div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_table = compressed.table_data.size() > 0;</div> |
| <div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_window = compressed.window_data.size() > 0;</div> |
| <div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keyword">const</span> uint8_t preamble_ints = get_preamble_ints(num_coupons, has_hip, has_table, has_window);</div> |
| <div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  write(os, preamble_ints);</div> |
| <div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keyword">const</span> uint8_t serial_version = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  write(os, serial_version);</div> |
| <div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keyword">const</span> uint8_t family = FAMILY;</div> |
| <div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  write(os, family);</div> |
| <div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  write(os, lg_k);</div> |
| <div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  write(os, first_interesting_column);</div> |
| <div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keyword">const</span> uint8_t flags_byte(</div> |
| <div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  (1 << flags::IS_COMPRESSED)</div> |
| <div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  | (has_hip ? 1 << flags::HAS_HIP : 0)</div> |
| <div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  | (has_table ? 1 << flags::HAS_TABLE : 0)</div> |
| <div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  | (has_window ? 1 << flags::HAS_WINDOW : 0)</div> |
| <div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  );</div> |
| <div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  write(os, flags_byte);</div> |
| <div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keyword">const</span> uint16_t seed_hash(compute_seed_hash(seed));</div> |
| <div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  write(os, seed_hash);</div> |
| <div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">if</span> (!is_empty()) {</div> |
| <div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  write(os, num_coupons);</div> |
| <div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keywordflow">if</span> (has_table && has_window) {</div> |
| <div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="comment">// if there is no window it is the same as number of coupons</span></div> |
| <div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  write(os, compressed.table_num_entries);</div> |
| <div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="comment">// HIP values can be in two different places in the sequence of fields</span></div> |
| <div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="comment">// this is the first HIP decision point</span></div> |
| <div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="keywordflow">if</span> (has_hip) write_hip(os);</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>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  write(os, compressed.table_data_words);</div> |
| <div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div> |
| <div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  write(os, compressed.window_data_words);</div> |
| <div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div> |
| <div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="comment">// this is the second HIP decision point</span></div> |
| <div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">if</span> (has_hip && !(has_table && has_window)) write_hip(os);</div> |
| <div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  write(os, compressed.window_data.data(), compressed.window_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  }</div> |
| <div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  write(os, compressed.table_data.data(), compressed.table_data_words * <span class="keyword">sizeof</span>(uint32_t));</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>  }</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>  </div> |
| <div class="line"><a name="l00460"></a><span class="lineno"> 460</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00461"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a1c7a57911806d47ee3cebe9fad59f836"> 461</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924">cpc_sketch_alloc<A>::serialize</a>(<span class="keywordtype">unsigned</span> header_size_bytes) <span class="keyword">const</span> -> vector_bytes {</div> |
| <div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  compressed_state<A> compressed(sliding_window.get_allocator());</div> |
| <div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  compressed.table_data_words = 0;</div> |
| <div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  compressed.table_num_entries = 0;</div> |
| <div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  compressed.window_data_words = 0;</div> |
| <div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  get_compressor<A>().compress(*<span class="keyword">this</span>, compressed);</div> |
| <div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_hip = !was_merged;</div> |
| <div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_table = compressed.table_data.size() > 0;</div> |
| <div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_window = compressed.window_data.size() > 0;</div> |
| <div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keyword">const</span> uint8_t preamble_ints = get_preamble_ints(num_coupons, has_hip, has_table, has_window);</div> |
| <div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> size = header_size_bytes + (preamble_ints + compressed.table_data_words + compressed.window_data_words) * <span class="keyword">sizeof</span>(uint32_t);</div> |
| <div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  vector_bytes bytes(size, 0, sliding_window.get_allocator());</div> |
| <div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  uint8_t* ptr = bytes.data() + header_size_bytes;</div> |
| <div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  ptr += copy_to_mem(preamble_ints, ptr);</div> |
| <div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keyword">const</span> uint8_t serial_version = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  ptr += copy_to_mem(serial_version, ptr);</div> |
| <div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <span class="keyword">const</span> uint8_t family = FAMILY;</div> |
| <div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  ptr += copy_to_mem(family, ptr);</div> |
| <div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  ptr += copy_to_mem(lg_k, ptr);</div> |
| <div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  ptr += copy_to_mem(first_interesting_column, ptr);</div> |
| <div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keyword">const</span> uint8_t flags_byte(</div> |
| <div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  (1 << flags::IS_COMPRESSED)</div> |
| <div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  | (has_hip ? 1 << flags::HAS_HIP : 0)</div> |
| <div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  | (has_table ? 1 << flags::HAS_TABLE : 0)</div> |
| <div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  | (has_window ? 1 << flags::HAS_WINDOW : 0)</div> |
| <div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  );</div> |
| <div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  ptr += copy_to_mem(flags_byte, ptr);</div> |
| <div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  <span class="keyword">const</span> uint16_t seed_hash = compute_seed_hash(seed);</div> |
| <div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  ptr += copy_to_mem(seed_hash, ptr);</div> |
| <div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keywordflow">if</span> (!is_empty()) {</div> |
| <div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  ptr += copy_to_mem(num_coupons, ptr);</div> |
| <div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="keywordflow">if</span> (has_table && has_window) {</div> |
| <div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="comment">// if there is no window it is the same as number of coupons</span></div> |
| <div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  ptr += copy_to_mem(compressed.table_num_entries, ptr);</div> |
| <div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="comment">// HIP values can be in two different places in the sequence of fields</span></div> |
| <div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="comment">// this is the first HIP decision point</span></div> |
| <div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="keywordflow">if</span> (has_hip) ptr += copy_hip_to_mem(ptr);</div> |
| <div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  }</div> |
| <div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  ptr += copy_to_mem(compressed.table_data_words, ptr);</div> |
| <div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  }</div> |
| <div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  ptr += copy_to_mem(compressed.window_data_words, ptr);</div> |
| <div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  }</div> |
| <div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="comment">// this is the second HIP decision point</span></div> |
| <div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">if</span> (has_hip && !(has_table && has_window)) ptr += copy_hip_to_mem(ptr);</div> |
| <div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  ptr += copy_to_mem(compressed.window_data.data(), ptr, compressed.window_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  }</div> |
| <div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  ptr += copy_to_mem(compressed.table_data.data(), ptr, compressed.table_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  }</div> |
| <div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  }</div> |
| <div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">if</span> (ptr != bytes.data() + size) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"serialized size mismatch"</span>);</div> |
| <div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">return</span> bytes;</div> |
| <div class="line"><a name="l00516"></a><span class="lineno"> 516</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00519"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a54ceaffd48627a356af3f72a7cc1d4ae"> 519</a></span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc<A></a> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a54ceaffd48627a356af3f72a7cc1d4ae">cpc_sketch_alloc<A>::deserialize</a>(std::istream& is, uint64_t seed, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keyword">const</span> <span class="keyword">auto</span> preamble_ints = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="keyword">const</span> <span class="keyword">auto</span> serial_version = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keyword">const</span> <span class="keyword">auto</span> family_id = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keyword">const</span> <span class="keyword">auto</span> lg_k = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keyword">const</span> <span class="keyword">auto</span> first_interesting_column = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keyword">const</span> <span class="keyword">auto</span> flags_byte = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keyword">const</span> <span class="keyword">auto</span> seed_hash = read<uint16_t>(is);</div> |
| <div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_hip = flags_byte & (1 << flags::HAS_HIP);</div> |
| <div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_table = flags_byte & (1 << flags::HAS_TABLE);</div> |
| <div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_window = flags_byte & (1 << flags::HAS_WINDOW);</div> |
| <div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  compressed_state<A> compressed(allocator);</div> |
| <div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  compressed.table_data_words = 0;</div> |
| <div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  compressed.table_num_entries = 0;</div> |
| <div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  compressed.window_data_words = 0;</div> |
| <div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  uint32_t num_coupons = 0;</div> |
| <div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordtype">double</span> kxp = 0;</div> |
| <div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keywordtype">double</span> hip_est_accum = 0;</div> |
| <div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">if</span> (has_table || has_window) {</div> |
| <div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  num_coupons = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keywordflow">if</span> (has_table && has_window) {</div> |
| <div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  compressed.table_num_entries = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">if</span> (has_hip) {</div> |
| <div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  kxp = read<double>(is);</div> |
| <div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  hip_est_accum = read<double>(is);</div> |
| <div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  }</div> |
| <div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  }</div> |
| <div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  compressed.table_data_words = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  }</div> |
| <div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  compressed.window_data_words = read<uint32_t>(is);</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>  <span class="keywordflow">if</span> (has_hip && !(has_table && has_window)) {</div> |
| <div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  kxp = read<double>(is);</div> |
| <div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  hip_est_accum = read<double>(is);</div> |
| <div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  }</div> |
| <div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  compressed.window_data.resize(compressed.window_data_words);</div> |
| <div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  read(is, compressed.window_data.data(), compressed.window_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  }</div> |
| <div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  compressed.table_data.resize(compressed.table_data_words);</div> |
| <div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  read(is, compressed.table_data.data(), compressed.table_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div> |
| <div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">if</span> (!has_window) compressed.table_num_entries = num_coupons;</div> |
| <div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  }</div> |
| <div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  </div> |
| <div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  uint8_t expected_preamble_ints = get_preamble_ints(num_coupons, has_hip, has_table, has_window);</div> |
| <div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">if</span> (preamble_ints != expected_preamble_ints) {</div> |
| <div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: preamble ints: expected "</span></div> |
| <div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  + std::to_string(expected_preamble_ints) + <span class="stringliteral">", got "</span> + std::to_string(preamble_ints));</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>  <span class="keywordflow">if</span> (serial_version != SERIAL_VERSION) {</div> |
| <div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: serial version: expected "</span></div> |
| <div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  + std::to_string(SERIAL_VERSION) + <span class="stringliteral">", got "</span> + std::to_string(serial_version));</div> |
| <div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  }</div> |
| <div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keywordflow">if</span> (family_id != FAMILY) {</div> |
| <div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: family: expected "</span></div> |
| <div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  + std::to_string(FAMILY) + <span class="stringliteral">", got "</span> + std::to_string(family_id));</div> |
| <div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  }</div> |
| <div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordflow">if</span> (seed_hash != compute_seed_hash(seed)) {</div> |
| <div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Incompatible seed hashes: "</span> + std::to_string(seed_hash) + <span class="stringliteral">", "</span></div> |
| <div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  + std::to_string(compute_seed_hash(seed)));</div> |
| <div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  }</div> |
| <div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  uncompressed_state<A> uncompressed(allocator);</div> |
| <div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  get_compressor<A>().uncompress(compressed, uncompressed, lg_k, num_coupons);</div> |
| <div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordflow">if</span> (!is.good())</div> |
| <div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"error reading from std::istream"</span>); </div> |
| <div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">return</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc</a>(lg_k, num_coupons, first_interesting_column, std::move(uncompressed.table),</div> |
| <div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  std::move(uncompressed.window), has_hip, kxp, hip_est_accum, seed);</div> |
| <div class="line"><a name="l00590"></a><span class="lineno"> 590</span> }</div> |
| <div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  </div> |
| <div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00593"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a377b9d3804183254b0e77ee18d370e07"> 593</a></span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc<A></a> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a54ceaffd48627a356af3f72a7cc1d4ae">cpc_sketch_alloc<A>::deserialize</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* bytes, <span class="keywordtype">size_t</span> size, uint64_t seed, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  ensure_minimum_memory(size, 8);</div> |
| <div class="line"><a name="l00595"></a><span class="lineno"> 595</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="l00596"></a><span class="lineno"> 596</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* base = <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="l00597"></a><span class="lineno"> 597</span>  uint8_t preamble_ints;</div> |
| <div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  ptr += copy_from_mem(ptr, preamble_ints);</div> |
| <div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  uint8_t serial_version;</div> |
| <div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  ptr += copy_from_mem(ptr, serial_version);</div> |
| <div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  uint8_t family_id;</div> |
| <div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  ptr += copy_from_mem(ptr, family_id);</div> |
| <div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  uint8_t lg_k;</div> |
| <div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  ptr += copy_from_mem(ptr, lg_k);</div> |
| <div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  uint8_t first_interesting_column;</div> |
| <div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  ptr += copy_from_mem(ptr, first_interesting_column);</div> |
| <div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  uint8_t flags_byte;</div> |
| <div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  ptr += copy_from_mem(ptr, flags_byte);</div> |
| <div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  uint16_t seed_hash;</div> |
| <div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  ptr += copy_from_mem(ptr, seed_hash);</div> |
| <div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_hip = flags_byte & (1 << flags::HAS_HIP);</div> |
| <div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_table = flags_byte & (1 << flags::HAS_TABLE);</div> |
| <div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> has_window = flags_byte & (1 << flags::HAS_WINDOW);</div> |
| <div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  ensure_minimum_memory(size, preamble_ints << 2);</div> |
| <div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  compressed_state<A> compressed(allocator);</div> |
| <div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  compressed.table_data_words = 0;</div> |
| <div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  compressed.table_num_entries = 0;</div> |
| <div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  compressed.window_data_words = 0;</div> |
| <div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  uint32_t num_coupons = 0;</div> |
| <div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordtype">double</span> kxp = 0;</div> |
| <div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keywordtype">double</span> hip_est_accum = 0;</div> |
| <div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordflow">if</span> (has_table || has_window) {</div> |
| <div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(num_coupons), size);</div> |
| <div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  ptr += copy_from_mem(ptr, num_coupons);</div> |
| <div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keywordflow">if</span> (has_table && has_window) {</div> |
| <div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(compressed.table_num_entries), size);</div> |
| <div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  ptr += copy_from_mem(ptr, compressed.table_num_entries);</div> |
| <div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  <span class="keywordflow">if</span> (has_hip) {</div> |
| <div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(kxp) + <span class="keyword">sizeof</span>(hip_est_accum), size);</div> |
| <div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  ptr += copy_from_mem(ptr, kxp);</div> |
| <div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  ptr += copy_from_mem(ptr, hip_est_accum);</div> |
| <div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  }</div> |
| <div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  }</div> |
| <div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(compressed.table_data_words), size);</div> |
| <div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  ptr += copy_from_mem(ptr, compressed.table_data_words);</div> |
| <div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  }</div> |
| <div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(compressed.window_data_words), size);</div> |
| <div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  ptr += copy_from_mem(ptr, compressed.window_data_words);</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">if</span> (has_hip && !(has_table && has_window)) {</div> |
| <div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  check_memory_size(ptr - base + <span class="keyword">sizeof</span>(kxp) + <span class="keyword">sizeof</span>(hip_est_accum), size);</div> |
| <div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  ptr += copy_from_mem(ptr, kxp);</div> |
| <div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  ptr += copy_from_mem(ptr, hip_est_accum);</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>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  compressed.window_data.resize(compressed.window_data_words);</div> |
| <div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  check_memory_size(ptr - base + (compressed.window_data_words * <span class="keyword">sizeof</span>(uint32_t)), size);</div> |
| <div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  ptr += copy_from_mem(ptr, compressed.window_data.data(), compressed.window_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  }</div> |
| <div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  compressed.table_data.resize(compressed.table_data_words);</div> |
| <div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  check_memory_size(ptr - base + (compressed.table_data_words * <span class="keyword">sizeof</span>(uint32_t)), size);</div> |
| <div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  ptr += copy_from_mem(ptr, compressed.table_data.data(), compressed.table_data_words * <span class="keyword">sizeof</span>(uint32_t));</div> |
| <div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  }</div> |
| <div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <span class="keywordflow">if</span> (!has_window) compressed.table_num_entries = num_coupons;</div> |
| <div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  }</div> |
| <div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <span class="keywordflow">if</span> (ptr != <span class="keyword">static_cast<</span><span class="keyword">const </span><span class="keywordtype">char</span>*<span class="keyword">></span>(bytes) + size) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"deserialized size mismatch"</span>);</div> |
| <div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  </div> |
| <div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  uint8_t expected_preamble_ints = get_preamble_ints(num_coupons, has_hip, has_table, has_window);</div> |
| <div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">if</span> (preamble_ints != expected_preamble_ints) {</div> |
| <div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: preamble ints: expected "</span></div> |
| <div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  + std::to_string(expected_preamble_ints) + <span class="stringliteral">", got "</span> + std::to_string(preamble_ints));</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">if</span> (serial_version != SERIAL_VERSION) {</div> |
| <div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: serial version: expected "</span></div> |
| <div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  + std::to_string(SERIAL_VERSION) + <span class="stringliteral">", got "</span> + std::to_string(serial_version));</div> |
| <div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  }</div> |
| <div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="keywordflow">if</span> (family_id != FAMILY) {</div> |
| <div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: family: expected "</span></div> |
| <div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  + std::to_string(FAMILY) + <span class="stringliteral">", got "</span> + std::to_string(family_id));</div> |
| <div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  }</div> |
| <div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keywordflow">if</span> (seed_hash != compute_seed_hash(seed)) {</div> |
| <div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Incompatible seed hashes: "</span> + std::to_string(seed_hash) + <span class="stringliteral">", "</span></div> |
| <div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  + std::to_string(compute_seed_hash(seed)));</div> |
| <div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  }</div> |
| <div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  uncompressed_state<A> uncompressed(allocator);</div> |
| <div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  get_compressor<A>().uncompress(compressed, uncompressed, lg_k, num_coupons);</div> |
| <div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordflow">return</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc</a>(lg_k, num_coupons, first_interesting_column, std::move(uncompressed.table),</div> |
| <div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  std::move(uncompressed.window), has_hip, kxp, hip_est_accum, seed);</div> |
| <div class="line"><a name="l00682"></a><span class="lineno"> 682</span> }</div> |
| <div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  </div> |
| <div class="line"><a name="l00684"></a><span class="lineno"> 684</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="comment"> * These empirical values for the 99.9th percentile of size in bytes were measured using 100,000</span></div> |
| <div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="comment"> * trials. The value for each trial is the maximum of 5*16=80 measurements that were equally</span></div> |
| <div class="line"><a name="l00687"></a><span class="lineno"> 687</span> <span class="comment"> * spaced over values of the quantity C/K between 3.0 and 8.0. This table does not include the</span></div> |
| <div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <span class="comment"> * worst-case space for the preamble, which is added by the function.</span></div> |
| <div class="line"><a name="l00689"></a><span class="lineno"> 689</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t CPC_EMPIRICAL_SIZE_MAX_LGK = 19;</div> |
| <div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> CPC_EMPIRICAL_MAX_SIZE_BYTES[] = {</div> |
| <div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  24, <span class="comment">// lg_k = 4</span></div> |
| <div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  36, <span class="comment">// lg_k = 5</span></div> |
| <div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  56, <span class="comment">// lg_k = 6</span></div> |
| <div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  100, <span class="comment">// lg_k = 7</span></div> |
| <div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  180, <span class="comment">// lg_k = 8</span></div> |
| <div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  344, <span class="comment">// lg_k = 9</span></div> |
| <div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  660, <span class="comment">// lg_k = 10</span></div> |
| <div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  1292, <span class="comment">// lg_k = 11</span></div> |
| <div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  2540, <span class="comment">// lg_k = 12</span></div> |
| <div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  5020, <span class="comment">// lg_k = 13</span></div> |
| <div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  9968, <span class="comment">// lg_k = 14</span></div> |
| <div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  19836, <span class="comment">// lg_k = 15</span></div> |
| <div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  39532, <span class="comment">// lg_k = 16</span></div> |
| <div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  78880, <span class="comment">// lg_k = 17</span></div> |
| <div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  157516, <span class="comment">// lg_k = 18</span></div> |
| <div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  314656 <span class="comment">// lg_k = 19</span></div> |
| <div class="line"><a name="l00708"></a><span class="lineno"> 708</span> };</div> |
| <div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> CPC_EMPIRICAL_MAX_SIZE_FACTOR = 0.6; <span class="comment">// 0.6 = 4.8 / 8.0</span></div> |
| <div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> CPC_MAX_PREAMBLE_SIZE_BYTES = 40;</div> |
| <div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  </div> |
| <div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00713"></a><span class="lineno"><a class="line" href="classdatasketches_1_1cpc__sketch__alloc.html#a7fcd4a0f58526cadbf7557c5c7f540dc"> 713</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a7fcd4a0f58526cadbf7557c5c7f540dc">cpc_sketch_alloc<A>::get_max_serialized_size_bytes</a>(uint8_t lg_k) {</div> |
| <div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  check_lg_k(lg_k);</div> |
| <div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  <span class="keywordflow">if</span> (lg_k <= CPC_EMPIRICAL_SIZE_MAX_LGK) {</div> |
| <div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  <span class="keywordflow">return</span> CPC_EMPIRICAL_MAX_SIZE_BYTES[lg_k - <a class="code" href="namespacedatasketches_1_1cpc__constants.html#a80c5dfefaf69318c0894ec34c34d0987">cpc_constants::MIN_LG_K</a>] + CPC_MAX_PREAMBLE_SIZE_BYTES;</div> |
| <div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  }</div> |
| <div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <span class="keywordflow">return</span> (<span class="keywordtype">int</span>) (CPC_EMPIRICAL_MAX_SIZE_FACTOR * k) + CPC_MAX_PREAMBLE_SIZE_BYTES;</div> |
| <div class="line"><a name="l00720"></a><span class="lineno"> 720</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00723"></a><span class="lineno"> 723</span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html">cpc_sketch_alloc<A>::check_lg_k</a>(uint8_t lg_k) {</div> |
| <div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <span class="keywordflow">if</span> (lg_k < cpc_constants::MIN_LG_K || lg_k > <a class="code" href="namespacedatasketches_1_1cpc__constants.html#ad15c7a6b3af91806e0a9743d27943d49">cpc_constants::MAX_LG_K</a>) {</div> |
| <div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"lg_k must be >= "</span> + std::to_string(<a class="code" href="namespacedatasketches_1_1cpc__constants.html#a80c5dfefaf69318c0894ec34c34d0987">cpc_constants::MIN_LG_K</a>) + <span class="stringliteral">" and <= "</span></div> |
| <div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  + std::to_string(<a class="code" href="namespacedatasketches_1_1cpc__constants.html#ad15c7a6b3af91806e0a9743d27943d49">cpc_constants::MAX_LG_K</a>) + <span class="stringliteral">": "</span> + std::to_string(lg_k));</div> |
| <div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  }</div> |
| <div class="line"><a name="l00728"></a><span class="lineno"> 728</span> }</div> |
| <div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  </div> |
| <div class="line"><a name="l00730"></a><span class="lineno"> 730</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00731"></a><span class="lineno"> 731</span> uint32_t cpc_sketch_alloc<A>::get_num_coupons()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <span class="keywordflow">return</span> num_coupons;</div> |
| <div class="line"><a name="l00733"></a><span class="lineno"> 733</span> }</div> |
| <div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  </div> |
| <div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="keywordtype">bool</span> cpc_sketch_alloc<A>::validate()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  vector_u64 bit_matrix = build_bit_matrix();</div> |
| <div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keyword">const</span> uint64_t num_bits_set = count_bits_set_in_matrix(bit_matrix.data(), 1ULL << lg_k);</div> |
| <div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="keywordflow">return</span> num_bits_set == num_coupons;</div> |
| <div class="line"><a name="l00740"></a><span class="lineno"> 740</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00743"></a><span class="lineno"> 743</span> <a class="code" href="classdatasketches_1_1cpc__sketch__alloc.html#a39d6cd5eff1a9af78f58108ba5297b47">cpc_sketch_alloc<A>::cpc_sketch_alloc</a>(uint8_t lg_k, uint32_t num_coupons, uint8_t first_interesting_column,</div> |
| <div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  u32_table<A>&& table, vector_bytes&& window, <span class="keywordtype">bool</span> has_hip, <span class="keywordtype">double</span> kxp, <span class="keywordtype">double</span> hip_est_accum, uint64_t seed):</div> |
| <div class="line"><a name="l00745"></a><span class="lineno"> 745</span> lg_k(lg_k),</div> |
| <div class="line"><a name="l00746"></a><span class="lineno"> 746</span> seed(seed),</div> |
| <div class="line"><a name="l00747"></a><span class="lineno"> 747</span> was_merged(!has_hip),</div> |
| <div class="line"><a name="l00748"></a><span class="lineno"> 748</span> num_coupons(num_coupons),</div> |
| <div class="line"><a name="l00749"></a><span class="lineno"> 749</span> surprising_value_table(std::move(table)),</div> |
| <div class="line"><a name="l00750"></a><span class="lineno"> 750</span> sliding_window(std::move(window)),</div> |
| <div class="line"><a name="l00751"></a><span class="lineno"> 751</span> window_offset(determine_correct_offset(lg_k, num_coupons)),</div> |
| <div class="line"><a name="l00752"></a><span class="lineno"> 752</span> first_interesting_column(first_interesting_column),</div> |
| <div class="line"><a name="l00753"></a><span class="lineno"> 753</span> kxp(kxp),</div> |
| <div class="line"><a name="l00754"></a><span class="lineno"> 754</span> hip_est_accum(hip_est_accum)</div> |
| <div class="line"><a name="l00755"></a><span class="lineno"> 755</span> {}</div> |
| <div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  </div> |
| <div class="line"><a name="l00757"></a><span class="lineno"> 757</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00758"></a><span class="lineno"> 758</span> uint8_t cpc_sketch_alloc<A>::get_preamble_ints(uint32_t num_coupons, <span class="keywordtype">bool</span> has_hip, <span class="keywordtype">bool</span> has_table, <span class="keywordtype">bool</span> has_window) {</div> |
| <div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  uint8_t preamble_ints = 2;</div> |
| <div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordflow">if</span> (num_coupons > 0) {</div> |
| <div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  preamble_ints += 1; <span class="comment">// number of coupons</span></div> |
| <div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordflow">if</span> (has_hip) {</div> |
| <div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  preamble_ints += 4; <span class="comment">// HIP</span></div> |
| <div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  }</div> |
| <div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">if</span> (has_table) {</div> |
| <div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  preamble_ints += 1; <span class="comment">// table data length</span></div> |
| <div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="comment">// number of values (if there is no window it is the same as number of coupons)</span></div> |
| <div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <span class="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  preamble_ints += 1;</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="keywordflow">if</span> (has_window) {</div> |
| <div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  preamble_ints += 1; <span class="comment">// window length</span></div> |
| <div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  }</div> |
| <div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  }</div> |
| <div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="keywordflow">return</span> preamble_ints;</div> |
| <div class="line"><a name="l00777"></a><span class="lineno"> 777</span> }</div> |
| <div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  </div> |
| <div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00780"></a><span class="lineno"> 780</span> <span class="keyword">typename</span> cpc_sketch_alloc<A>::flavor cpc_sketch_alloc<A>::determine_flavor()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="keywordflow">return</span> determine_flavor(lg_k, num_coupons);</div> |
| <div class="line"><a name="l00782"></a><span class="lineno"> 782</span> }</div> |
| <div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  </div> |
| <div class="line"><a name="l00784"></a><span class="lineno"> 784</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00785"></a><span class="lineno"> 785</span> <span class="keyword">typename</span> cpc_sketch_alloc<A>::flavor cpc_sketch_alloc<A>::determine_flavor(uint8_t lg_k, uint64_t c) {</div> |
| <div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keyword">const</span> uint64_t c2 = c << 1;</div> |
| <div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="keyword">const</span> uint64_t c8 = c << 3;</div> |
| <div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="keyword">const</span> uint64_t c32 = c << 5;</div> |
| <div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="keywordflow">if</span> (c == 0) <span class="keywordflow">return</span> EMPTY; <span class="comment">// 0 == C < 1</span></div> |
| <div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keywordflow">if</span> (c32 < 3 * k) <span class="keywordflow">return</span> SPARSE; <span class="comment">// 1 <= C < 3K/32</span></div> |
| <div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  <span class="keywordflow">if</span> (c2 < k) <span class="keywordflow">return</span> HYBRID; <span class="comment">// 3K/32 <= C < K/2</span></div> |
| <div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keywordflow">if</span> (c8 < 27 * k) <span class="keywordflow">return</span> PINNED; <span class="comment">// K/2 <= C < 27K/8</span></div> |
| <div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  <span class="keywordflow">else</span> <span class="keywordflow">return</span> SLIDING; <span class="comment">// 27K/8 <= C</span></div> |
| <div class="line"><a name="l00795"></a><span class="lineno"> 795</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00798"></a><span class="lineno"> 798</span> uint8_t cpc_sketch_alloc<A>::determine_correct_offset(uint8_t lg_k, uint64_t c) {</div> |
| <div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="keyword">const</span> int64_t tmp = <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(c << 3) - <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(19 * k); <span class="comment">// 8C - 19K</span></div> |
| <div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <span class="keywordflow">if</span> (tmp < 0) <span class="keywordflow">return</span> 0;</div> |
| <div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(tmp >> (lg_k + 3)); <span class="comment">// tmp / 8K</span></div> |
| <div class="line"><a name="l00803"></a><span class="lineno"> 803</span> }</div> |
| <div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  </div> |
| <div class="line"><a name="l00805"></a><span class="lineno"> 805</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00806"></a><span class="lineno"> 806</span> <span class="keyword">auto</span> cpc_sketch_alloc<A>::build_bit_matrix() const -> vector_u64 {</div> |
| <div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="keyword">const</span> uint32_t k = 1 << lg_k;</div> |
| <div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="keywordflow">if</span> (window_offset > 56) <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"offset > 56"</span>);</div> |
| <div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  </div> |
| <div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  <span class="comment">// Fill the matrix with default rows in which the "early zone" is filled with ones.</span></div> |
| <div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  <span class="comment">// This is essential for the routine's O(k) time cost (as opposed to O(C)).</span></div> |
| <div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keyword">const</span> uint64_t default_row = (<span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(1) << window_offset) - 1;</div> |
| <div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  vector_u64 matrix(k, default_row, sliding_window.get_allocator());</div> |
| <div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  </div> |
| <div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keywordflow">if</span> (num_coupons == 0) <span class="keywordflow">return</span> matrix;</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>  <span class="keywordflow">if</span> (sliding_window.size() > 0) { <span class="comment">// In other words, we are in window mode, not sparse mode</span></div> |
| <div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < k; i++) { <span class="comment">// set the window bits, trusting the sketch's current offset</span></div> |
| <div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  matrix[i] |= <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(sliding_window[i]) << window_offset;</div> |
| <div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  }</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>  </div> |
| <div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  <span class="keyword">const</span> uint32_t* slots = surprising_value_table.get_slots();</div> |
| <div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="keyword">const</span> uint32_t num_slots = 1 << surprising_value_table.get_lg_size();</div> |
| <div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < num_slots; i++) {</div> |
| <div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <span class="keyword">const</span> uint32_t row_col = slots[i];</div> |
| <div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keywordflow">if</span> (row_col != UINT32_MAX) {</div> |
| <div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="keyword">const</span> uint8_t col = row_col & 63;</div> |
| <div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  <span class="keyword">const</span> uint32_t row = row_col >> 6;</div> |
| <div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="comment">// Flip the specified matrix bit from its default value.</span></div> |
| <div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="comment">// In the "early" zone the bit changes from 1 to 0.</span></div> |
| <div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <span class="comment">// In the "late" zone the bit changes from 0 to 1.</span></div> |
| <div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  matrix[row] ^= <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(1) << col;</div> |
| <div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  }</div> |
| <div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  }</div> |
| <div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  <span class="keywordflow">return</span> matrix;</div> |
| <div class="line"><a name="l00837"></a><span class="lineno"> 837</span> }</div> |
| <div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  </div> |
| <div class="line"><a name="l00839"></a><span class="lineno"> 839</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00840"></a><span class="lineno"> 840</span> <span class="keywordtype">void</span> cpc_sketch_alloc<A>::write_hip(std::ostream& os)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  write(os, kxp);</div> |
| <div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  write(os, hip_est_accum);</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="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="keywordtype">size_t</span> cpc_sketch_alloc<A>::copy_hip_to_mem(<span class="keywordtype">void</span>* dst)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  memcpy(dst, &kxp, <span class="keyword">sizeof</span>(kxp));</div> |
| <div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  memcpy(<span class="keyword">static_cast<</span><span class="keywordtype">char</span>*<span class="keyword">></span>(dst) + <span class="keyword">sizeof</span>(kxp), &hip_est_accum, <span class="keyword">sizeof</span>(hip_est_accum));</div> |
| <div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="keywordflow">return</span> <span class="keyword">sizeof</span>(kxp) + <span class="keyword">sizeof</span>(hip_est_accum);</div> |
| <div class="line"><a name="l00850"></a><span class="lineno"> 850</span> }</div> |
| <div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  </div> |
| <div class="line"><a name="l00852"></a><span class="lineno"> 852</span> } <span class="comment">/* namespace datasketches */</span></div> |
| <div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  </div> |
| <div class="line"><a name="l00854"></a><span class="lineno"> 854</span> <span class="preprocessor">#endif</span></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html">datasketches::cpc_sketch_alloc</a></div><div class="ttdoc">High performance C++ implementation of Compressed Probabilistic Counting (CPC) Sketch.</div><div class="ttdef"><b>Definition:</b> cpc_sketch.hpp:64</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a1bcdd98ee6e6eb9b501b8dc5de5e8924"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a1bcdd98ee6e6eb9b501b8dc5de5e8924">datasketches::cpc_sketch_alloc::serialize</a></div><div class="ttdeci">void serialize(std::ostream &os) const</div><div class="ttdoc">This method serializes the sketch into a given stream in a binary form.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:408</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a2afb71f2ef2d82290be4c8eafc08f2a2"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a2afb71f2ef2d82290be4c8eafc08f2a2">datasketches::cpc_sketch_alloc::get_estimate</a></div><div class="ttdeci">double get_estimate() const</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:75</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a39d6cd5eff1a9af78f58108ba5297b47"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a39d6cd5eff1a9af78f58108ba5297b47">datasketches::cpc_sketch_alloc::cpc_sketch_alloc</a></div><div class="ttdeci">cpc_sketch_alloc(uint8_t lg_k=cpc_constants::DEFAULT_LG_K, uint64_t seed=DEFAULT_SEED, const A &allocator=A())</div><div class="ttdoc">Creates an instance of the sketch given the lg_k parameter and hash seed.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:44</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a54ceaffd48627a356af3f72a7cc1d4ae"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a54ceaffd48627a356af3f72a7cc1d4ae">datasketches::cpc_sketch_alloc::deserialize</a></div><div class="ttdeci">static cpc_sketch_alloc< A > deserialize(std::istream &is, uint64_t seed=DEFAULT_SEED, const A &allocator=A())</div><div class="ttdoc">This method deserializes a sketch from a given stream.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:519</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a58c0f2372495a3163616cb0f539395ea"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a58c0f2372495a3163616cb0f539395ea">datasketches::cpc_sketch_alloc::update</a></div><div class="ttdeci">void update(const std::string &value)</div><div class="ttdoc">Update this sketch with a given string.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:109</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a5a2b7a58dc85678d08752945ff655362"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a5a2b7a58dc85678d08752945ff655362">datasketches::cpc_sketch_alloc::is_empty</a></div><div class="ttdeci">bool is_empty() const</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:70</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a7fcd4a0f58526cadbf7557c5c7f540dc"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a7fcd4a0f58526cadbf7557c5c7f540dc">datasketches::cpc_sketch_alloc::get_max_serialized_size_bytes</a></div><div class="ttdeci">static size_t get_max_serialized_size_bytes(uint8_t lg_k)</div><div class="ttdoc">The actual size of a compressed CPC sketch has a small random variance, but the following empirically...</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:713</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a8f8b2691781d682411a6de23996a8be2"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a8f8b2691781d682411a6de23996a8be2">datasketches::cpc_sketch_alloc::get_lg_k</a></div><div class="ttdeci">uint8_t get_lg_k() const</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:65</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_a9d85cf47c4ecd0580ec623c42006dd1b"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#a9d85cf47c4ecd0580ec623c42006dd1b">datasketches::cpc_sketch_alloc::get_allocator</a></div><div class="ttdeci">A get_allocator() const</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:60</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_ab43d2075a173e631d757b07da971fe3d"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#ab43d2075a173e631d757b07da971fe3d">datasketches::cpc_sketch_alloc::get_lower_bound</a></div><div class="ttdeci">double get_lower_bound(unsigned kappa) const</div><div class="ttdoc">Returns the approximate lower error bound given a parameter kappa (1, 2 or 3).</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:91</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_adbfa99fa21d0f4acb1ba00ced8d8d858"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#adbfa99fa21d0f4acb1ba00ced8d8d858">datasketches::cpc_sketch_alloc::get_upper_bound</a></div><div class="ttdeci">double get_upper_bound(unsigned kappa) const</div><div class="ttdoc">Returns the approximate upper error bound given a parameter kappa (1, 2 or 3).</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:100</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1cpc__sketch__alloc_html_aed372241c10ffd041bee85602edb199a"><div class="ttname"><a href="classdatasketches_1_1cpc__sketch__alloc.html#aed372241c10ffd041bee85602edb199a">datasketches::cpc_sketch_alloc::to_string</a></div><div class="ttdeci">string< A > to_string() const</div><div class="ttdoc">Returns a human-readable summary of this sketch.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:383</div></div> |
| <div class="ttc" id="anamespacedatasketches_1_1cpc__constants_html_a80c5dfefaf69318c0894ec34c34d0987"><div class="ttname"><a href="namespacedatasketches_1_1cpc__constants.html#a80c5dfefaf69318c0894ec34c34d0987">datasketches::cpc_constants::MIN_LG_K</a></div><div class="ttdeci">const uint8_t MIN_LG_K</div><div class="ttdoc">min log2 of K</div><div class="ttdef"><b>Definition:</b> cpc_common.hpp:32</div></div> |
| <div class="ttc" id="anamespacedatasketches_1_1cpc__constants_html_ad15c7a6b3af91806e0a9743d27943d49"><div class="ttname"><a href="namespacedatasketches_1_1cpc__constants.html#ad15c7a6b3af91806e0a9743d27943d49">datasketches::cpc_constants::MAX_LG_K</a></div><div class="ttdeci">const uint8_t MAX_LG_K</div><div class="ttdoc">max log2 of K</div><div class="ttdef"><b>Definition:</b> cpc_common.hpp:34</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> |
| <div class="ttc" id="anamespacedatasketches_html_a3a7ac5efb6156547a8da91e937a06b07"><div class="ttname"><a href="namespacedatasketches.html#a3a7ac5efb6156547a8da91e937a06b07">datasketches::cpc_init</a></div><div class="ttdeci">void cpc_init()</div><div class="ttdoc">Allocation and initialization of global decompression (decoding) tables.</div><div class="ttdef"><b>Definition:</b> cpc_sketch_impl.hpp:39</div></div> |
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