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| <div class="title">frequent_items_sketch_impl.hpp</div> </div> |
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| <div class="contents"> |
| <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * distributed with this work for additional information</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * "License"); you may not use this file except in compliance</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * with the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * software distributed under the License is distributed on an</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * KIND, either express or implied. See the License for the</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * specific language governing permissions and limitations</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * under the License.</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#ifndef FREQUENT_ITEMS_SKETCH_IMPL_HPP_</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define FREQUENT_ITEMS_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 <cstring></span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <limits></span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <sstream></span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <stdexcept></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 "memory_operations.hpp"</span></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">namespace </span><a class="code" href="namespacedatasketches.html">datasketches</a> {</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// clang++ seems to require this declaration for CMAKE_BUILD_TYPE='Debug"</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">const</span> uint8_t frequent_items_sketch<T, W, H, E, A>::LG_MIN_MAP_SIZE;</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">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a225f700985a82a592a6fd7dc685d6044"> 37</a></span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a225f700985a82a592a6fd7dc685d6044">frequent_items_sketch<T, W, H, E, A>::frequent_items_sketch</a>(uint8_t lg_max_map_size, uint8_t lg_start_map_size,</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">const</span> E& equal, <span class="keyword">const</span> A& allocator):</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> total_weight(0),</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> offset(0),</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> map(</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  std::max(lg_start_map_size, <a class="code" href="classdatasketches_1_1frequent__items__sketch.html">frequent_items_sketch</a>::LG_MIN_MAP_SIZE),</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  std::max(lg_max_map_size, <a class="code" href="classdatasketches_1_1frequent__items__sketch.html">frequent_items_sketch</a>::LG_MIN_MAP_SIZE),</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  equal,</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  allocator</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> )</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (lg_start_map_size > lg_max_map_size) <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"starting size must not be greater than maximum size"</span>);</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a61957693a9a6d2b20882579d40e4f775"> 52</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a61957693a9a6d2b20882579d40e4f775">frequent_items_sketch<T, W, H, E, A>::update</a>(<span class="keyword">const</span> T& item, W weight) {</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  check_weight(weight);</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">if</span> (weight == 0) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  total_weight += weight;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  offset += map.adjust_or_insert(item, weight);</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> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a1217d7712089fac3876c35b210ac4c5e"> 60</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a61957693a9a6d2b20882579d40e4f775">frequent_items_sketch<T, W, H, E, A>::update</a>(T&& item, W weight) {</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  check_weight(weight);</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (weight == 0) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  total_weight += weight;</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  offset += map.adjust_or_insert(std::move(item), weight);</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> }</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  </div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00068"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a3384eaa5ad927a987343cdc509bd4f9c"> 68</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a3384eaa5ad927a987343cdc509bd4f9c">frequent_items_sketch<T, W, H, E, A>::merge</a>(<span class="keyword">const</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html">frequent_items_sketch</a>& other) {</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> (other.<a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a5a2b7a58dc85678d08752945ff655362">is_empty</a>()) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">const</span> W merged_total_weight = total_weight + other.<a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a68bf5133e42650cdfe20a7916037ab4b">get_total_weight</a>(); <span class="comment">// for correction at the end</span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: other.map) {</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  update(it.first, it.second);</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>  offset += other.offset;</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  total_weight = merged_total_weight;</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a67646860b1cb8e835604a008fd7d062a"> 79</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a3384eaa5ad927a987343cdc509bd4f9c">frequent_items_sketch<T, W, H, E, A>::merge</a>(<a class="code" href="classdatasketches_1_1frequent__items__sketch.html">frequent_items_sketch</a>&& other) {</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">if</span> (other.is_empty()) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">const</span> W merged_total_weight = total_weight + other.get_total_weight(); <span class="comment">// for correction at the end</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: other.map) {</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  update(std::move(it.first), it.second);</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>  offset += other.offset;</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  total_weight = merged_total_weight;</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> }</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> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a5a2b7a58dc85678d08752945ff655362"> 90</a></span> <span class="keywordtype">bool</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a5a2b7a58dc85678d08752945ff655362">frequent_items_sketch<T, W, H, E, A>::is_empty</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">return</span> map.get_num_active() == 0;</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> }</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#af72439eee5521a156379f0fbd869cb12"> 95</a></span> uint32_t <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#af72439eee5521a156379f0fbd869cb12">frequent_items_sketch<T, W, H, E, A>::get_num_active_items</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> map.get_num_active();</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> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a68bf5133e42650cdfe20a7916037ab4b"> 100</a></span> W <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a68bf5133e42650cdfe20a7916037ab4b">frequent_items_sketch<T, W, H, E, A>::get_total_weight</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> total_weight;</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</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="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#ab1b012eb1b049bf5a4fd0f02916655a3"> 105</a></span> W <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#ab1b012eb1b049bf5a4fd0f02916655a3">frequent_items_sketch<T, W, H, E, A>::get_estimate</a>(<span class="keyword">const</span> T& item)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// if item is tracked estimate = weight + offset, otherwise 0</span></div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> W weight = map.get(item);</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (weight > 0) <span class="keywordflow">return</span> weight + offset;</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> 0;</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> }</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#aed55e478ed35c861c3351b90c88fdbe7"> 113</a></span> W <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#aed55e478ed35c861c3351b90c88fdbe7">frequent_items_sketch<T, W, H, E, A>::get_lower_bound</a>(<span class="keyword">const</span> T& item)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> map.get(item);</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a2489b27ac0658fc4151aa98f0fb638f7"> 118</a></span> W <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a2489b27ac0658fc4151aa98f0fb638f7">frequent_items_sketch<T, W, H, E, A>::get_upper_bound</a>(<span class="keyword">const</span> T& item)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> map.get(item) + offset;</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  </div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#aa6a8295801139cde1c0136867cf1f188"> 123</a></span> W <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#aa6a8295801139cde1c0136867cf1f188">frequent_items_sketch<T, W, H, E, A>::get_maximum_error</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">return</span> offset;</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  </div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a7d758ee3fb67c30c547628bd8cc2d266"> 128</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a7d758ee3fb67c30c547628bd8cc2d266">frequent_items_sketch<T, W, H, E, A>::get_epsilon</a>()<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">return</span> EPSILON_FACTOR / (1 << map.get_lg_max_size());</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a88b29ea8d3966b76de96e183789f7f3e"> 133</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a7d758ee3fb67c30c547628bd8cc2d266">frequent_items_sketch<T, W, H, E, A>::get_epsilon</a>(uint8_t lg_max_map_size) {</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">return</span> EPSILON_FACTOR / (1 << lg_max_map_size);</div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span> }</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  </div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a6731cfa90aabc42089e1f449d3aa9a66"> 138</a></span> <span class="keywordtype">double</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a6731cfa90aabc42089e1f449d3aa9a66">frequent_items_sketch<T, W, H, E, A>::get_apriori_error</a>(uint8_t lg_max_map_size, W estimated_total_weight) {</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> get_epsilon(lg_max_map_size) * estimated_total_weight;</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a5412230c8878e0cc1be2c6940512f508"> 144</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a5412230c8878e0cc1be2c6940512f508">frequent_items_sketch<T, W, H, E, A>::get_frequent_items</a>(<a class="code" href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0f">frequent_items_error_type</a> err_type) <span class="keyword">const</span> -> vector_row {</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> get_frequent_items(err_type, get_maximum_error());</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> }</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00149"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a9b0618f5181938adc5bd00b9f40516b9"> 149</a></span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a5412230c8878e0cc1be2c6940512f508">frequent_items_sketch<T, W, H, E, A>::get_frequent_items</a>(<a class="code" href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0f">frequent_items_error_type</a> err_type, W threshold) <span class="keyword">const</span> -> vector_row {</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  vector_row items(map.get_allocator());</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: map) {</div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">const</span> W lb = it.second;</div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">const</span> W ub = it.second + offset;</div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> ((err_type == <a class="code" href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0fa5338495a1938a260d0f0489d35b2e8dd">NO_FALSE_NEGATIVES</a> && ub > threshold) || (err_type == <a class="code" href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0fa6f0f5df0005d6b6f0428d126eb0d75e9">NO_FALSE_POSITIVES</a> && lb > threshold)) {</div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  items.push_back(<a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a>(&it.first, it.second, offset));</div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// sort by estimate in descending order</span></div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  std::sort(items.begin(), items.end(), [](<a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a> a, <a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a> b){ return a.get_estimate() > b.get_estimate(); });</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">return</span> items;</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> }</div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">template</span><<span class="keyword">typename</span> SerDe></div> |
| <div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a538940c100e4353b3671ad452d3d3056"> 165</a></span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a538940c100e4353b3671ad452d3d3056">frequent_items_sketch<T, W, H, E, A>::serialize</a>(std::ostream& os, <span class="keyword">const</span> SerDe& sd)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">const</span> uint8_t preamble_longs = is_empty() ? PREAMBLE_LONGS_EMPTY : PREAMBLE_LONGS_NONEMPTY;</div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  write(os, preamble_longs);</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keyword">const</span> uint8_t serial_version = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  write(os, serial_version);</div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">const</span> uint8_t family = FAMILY_ID;</div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  write(os, family);</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">const</span> uint8_t lg_max_size = map.get_lg_max_size();</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  write(os, lg_max_size);</div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keyword">const</span> uint8_t lg_cur_size = map.get_lg_cur_size();</div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  write(os, lg_cur_size);</div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">const</span> uint8_t flags_byte(</div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  (is_empty() ? 1 << flags::IS_EMPTY_1 : 0)</div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  | (is_empty() ? 1 << flags::IS_EMPTY_2 : 0)</div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  );</div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  write(os, flags_byte);</div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keyword">const</span> uint16_t unused16 = 0;</div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  write(os, unused16);</div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">if</span> (!is_empty()) {</div> |
| <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">const</span> uint32_t num_items = map.get_num_active();</div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  write(os, num_items);</div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keyword">const</span> uint32_t unused32 = 0;</div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  write(os, unused32);</div> |
| <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  write(os, total_weight);</div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  write(os, offset);</div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  </div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// copy active items and their weights to use batch serialization</span></div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">using</span> AllocW = <span class="keyword">typename</span> std::allocator_traits<A>::template rebind_alloc<W>;</div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  AllocW aw(map.get_allocator());</div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  W* weights = aw.allocate(num_items);</div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  A alloc(map.get_allocator());</div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  T* items = alloc.allocate(num_items);</div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  uint32_t i = 0;</div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: map) {</div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keyword">new</span> (&items[i]) T(it.first);</div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  weights[i++] = it.second;</div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  write(os, weights, <span class="keyword">sizeof</span>(W) * num_items);</div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  aw.deallocate(weights, num_items);</div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  sd.serialize(os, items, num_items);</div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">for</span> (i = 0; i < num_items; i++) items[i].~T();</div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  alloc.deallocate(items, num_items);</div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span> }</div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  </div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="keyword">template</span><<span class="keyword">typename</span> SerDe></div> |
| <div class="line"><a name="l00212"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a8762fed25b3024f07989976344dd0afb"> 212</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a8762fed25b3024f07989976344dd0afb">frequent_items_sketch<T, W, H, E, A>::get_serialized_size_bytes</a>(<span class="keyword">const</span> SerDe& sd)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> (is_empty()) <span class="keywordflow">return</span> PREAMBLE_LONGS_EMPTY * <span class="keyword">sizeof</span>(uint64_t);</div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordtype">size_t</span> size = PREAMBLE_LONGS_NONEMPTY * <span class="keyword">sizeof</span>(uint64_t) + map.get_num_active() * <span class="keyword">sizeof</span>(W);</div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: map) size += sd.size_of_item(it.first);</div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">return</span> size;</div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span> }</div> |
| <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  </div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">template</span><<span class="keyword">typename</span> SerDe></div> |
| <div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="keyword">auto</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a538940c100e4353b3671ad452d3d3056">frequent_items_sketch<T, W, H, E, A>::serialize</a>(<span class="keywordtype">unsigned</span> header_size_bytes, <span class="keyword">const</span> SerDe& sd) <span class="keyword">const</span> -> vector_bytes {</div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> size = header_size_bytes + get_serialized_size_bytes(sd);</div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  vector_bytes bytes(size, 0, map.get_allocator());</div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  uint8_t* ptr = bytes.data() + header_size_bytes;</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  uint8_t* end_ptr = ptr + size;</div> |
| <div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  </div> |
| <div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keyword">const</span> uint8_t preamble_longs = is_empty() ? PREAMBLE_LONGS_EMPTY : PREAMBLE_LONGS_NONEMPTY;</div> |
| <div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  ptr += copy_to_mem(preamble_longs, ptr);</div> |
| <div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keyword">const</span> uint8_t serial_version = SERIAL_VERSION;</div> |
| <div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  ptr += copy_to_mem(serial_version, ptr);</div> |
| <div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keyword">const</span> uint8_t family = FAMILY_ID;</div> |
| <div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  ptr += copy_to_mem(family, ptr);</div> |
| <div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">const</span> uint8_t lg_max_size = map.get_lg_max_size();</div> |
| <div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  ptr += copy_to_mem(lg_max_size, ptr);</div> |
| <div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">const</span> uint8_t lg_cur_size = map.get_lg_cur_size();</div> |
| <div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  ptr += copy_to_mem(lg_cur_size, ptr);</div> |
| <div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">const</span> uint8_t flags_byte(</div> |
| <div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  (is_empty() ? 1 << flags::IS_EMPTY_1 : 0)</div> |
| <div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  | (is_empty() ? 1 << flags::IS_EMPTY_2 : 0)</div> |
| <div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  );</div> |
| <div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  ptr += copy_to_mem(flags_byte, ptr);</div> |
| <div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  ptr += <span class="keyword">sizeof</span>(uint16_t); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">if</span> (!is_empty()) {</div> |
| <div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">const</span> uint32_t num_items = map.get_num_active();</div> |
| <div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  ptr += copy_to_mem(num_items, ptr);</div> |
| <div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  ptr += <span class="keyword">sizeof</span>(uint32_t); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  ptr += copy_to_mem(total_weight, ptr);</div> |
| <div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  ptr += copy_to_mem(offset, ptr);</div> |
| <div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  </div> |
| <div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="comment">// copy active items and their weights to use batch serialization</span></div> |
| <div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keyword">using</span> AllocW = <span class="keyword">typename</span> std::allocator_traits<A>::template rebind_alloc<W>;</div> |
| <div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  AllocW aw(map.get_allocator());</div> |
| <div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  W* weights = aw.allocate(num_items);</div> |
| <div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  A alloc(map.get_allocator());</div> |
| <div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  T* items = alloc.allocate(num_items);</div> |
| <div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  uint32_t i = 0;</div> |
| <div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: map) {</div> |
| <div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">new</span> (&items[i]) T(it.first);</div> |
| <div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  weights[i++] = it.second;</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>  ptr += copy_to_mem(weights, ptr, <span class="keyword">sizeof</span>(W) * num_items);</div> |
| <div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  aw.deallocate(weights, num_items);</div> |
| <div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> bytes_remaining = end_ptr - ptr;</div> |
| <div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ptr += sd.serialize(ptr, bytes_remaining, items, num_items);</div> |
| <div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">for</span> (i = 0; i < num_items; i++) items[i].~T();</div> |
| <div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  alloc.deallocate(items, num_items);</div> |
| <div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  }</div> |
| <div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">return</span> bytes;</div> |
| <div class="line"><a name="l00269"></a><span class="lineno"> 269</span> }</div> |
| <div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  </div> |
| <div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">class </span>frequent_items_sketch<T, W, H, E, A>::items_deleter {</div> |
| <div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="keyword">public</span>:</div> |
| <div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  items_deleter(uint32_t num, <span class="keywordtype">bool</span> destroy, <span class="keyword">const</span> A& allocator):</div> |
| <div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  allocator_(allocator), num_(num), destroy_(destroy) {}</div> |
| <div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordtype">void</span> set_destroy(<span class="keywordtype">bool</span> destroy) { destroy_ = destroy; }</div> |
| <div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordtype">void</span> operator() (T* ptr) {</div> |
| <div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">if</span> (ptr != <span class="keyword">nullptr</span>) {</div> |
| <div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">if</span> (destroy_) {</div> |
| <div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < num_; ++i) ptr[i].~T();</div> |
| <div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</div> |
| <div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  allocator_.deallocate(ptr, num_);</div> |
| <div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  }</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">private</span>:</div> |
| <div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  A allocator_;</div> |
| <div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  uint32_t num_;</div> |
| <div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordtype">bool</span> destroy_;</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>  </div> |
| <div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="keyword">template</span><<span class="keyword">typename</span> SerDe></div> |
| <div class="line"><a name="l00293"></a><span class="lineno"> 293</span> frequent_items_sketch<T, W, H, E, A> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#aba8b57f65dd3f4d47be9aacbb3606118">frequent_items_sketch<T, W, H, E, A>::deserialize</a>(std::istream& is,</div> |
| <div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">const</span> SerDe& sd, <span class="keyword">const</span> E& equal, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keyword">const</span> <span class="keyword">auto</span> preamble_longs = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keyword">const</span> <span class="keyword">auto</span> serial_version = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keyword">const</span> <span class="keyword">auto</span> family_id = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keyword">const</span> <span class="keyword">auto</span> lg_max_size = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">const</span> <span class="keyword">auto</span> lg_cur_size = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">const</span> <span class="keyword">auto</span> flags_byte = read<uint8_t>(is);</div> |
| <div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  read<uint16_t>(is); <span class="comment">// unused</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>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_empty = (flags_byte & (1 << flags::IS_EMPTY_1)) | (flags_byte & (1 << flags::IS_EMPTY_2));</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>  check_preamble_longs(preamble_longs, is_empty);</div> |
| <div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  check_serial_version(serial_version);</div> |
| <div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  check_family_id(family_id);</div> |
| <div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  check_size(lg_cur_size, lg_max_size);</div> |
| <div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  </div> |
| <div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  frequent_items_sketch sketch(lg_max_size, lg_cur_size, equal, allocator);</div> |
| <div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">if</span> (!is_empty) {</div> |
| <div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keyword">const</span> <span class="keyword">auto</span> num_items = read<uint32_t>(is);</div> |
| <div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  read<uint32_t>(is); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">const</span> <span class="keyword">auto</span> total_weight = read<W>(is);</div> |
| <div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keyword">const</span> <span class="keyword">auto</span> offset = read<W>(is);</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">// batch deserialization with intermediate array of items and weights</span></div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keyword">using</span> AllocW = <span class="keyword">typename</span> std::allocator_traits<A>::template rebind_alloc<W>;</div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  std::vector<W, AllocW> weights(num_items, 0, allocator);</div> |
| <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  read(is, weights.data(), <span class="keyword">sizeof</span>(W) * num_items);</div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  A alloc(allocator);</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  std::unique_ptr<T, items_deleter> items(alloc.allocate(num_items), items_deleter(num_items, <span class="keyword">false</span>, alloc));</div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  sd.deserialize(is, items.get(), num_items);</div> |
| <div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  items.get_deleter().set_destroy(<span class="keyword">true</span>); <span class="comment">// serde did not throw, so the items must be constructed</span></div> |
| <div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < num_items; i++) {</div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  sketch.update(std::move(items.get()[i]), weights[i]);</div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  }</div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  sketch.total_weight = total_weight;</div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  sketch.offset = offset;</div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  }</div> |
| <div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> (!is.good())</div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"error reading from std::istream"</span>); </div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">return</span> sketch;</div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span> }</div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  </div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="keyword">template</span><<span class="keyword">typename</span> SerDe></div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span> frequent_items_sketch<T, W, H, E, A> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#aba8b57f65dd3f4d47be9aacbb3606118">frequent_items_sketch<T, W, H, E, A>::deserialize</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* bytes, <span class="keywordtype">size_t</span> size,</div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keyword">const</span> SerDe& sd, <span class="keyword">const</span> E& equal, <span class="keyword">const</span> A& allocator) {</div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  ensure_minimum_memory(size, 8);</div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</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="l00342"></a><span class="lineno"> 342</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="l00343"></a><span class="lineno"> 343</span>  uint8_t preamble_longs;</div> |
| <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  ptr += copy_from_mem(ptr, preamble_longs);</div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  uint8_t serial_version;</div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  ptr += copy_from_mem(ptr, serial_version);</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  uint8_t family_id;</div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  ptr += copy_from_mem(ptr, family_id);</div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  uint8_t lg_max_size;</div> |
| <div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  ptr += copy_from_mem(ptr, lg_max_size);</div> |
| <div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  uint8_t lg_cur_size;</div> |
| <div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  ptr += copy_from_mem(ptr, lg_cur_size);</div> |
| <div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  uint8_t flags_byte;</div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  ptr += copy_from_mem(ptr, flags_byte);</div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  ptr += <span class="keyword">sizeof</span>(uint16_t); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  </div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_empty = (flags_byte & (1 << flags::IS_EMPTY_1)) | (flags_byte & (1 << flags::IS_EMPTY_2));</div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  </div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  check_preamble_longs(preamble_longs, is_empty);</div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  check_serial_version(serial_version);</div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  check_family_id(family_id);</div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  check_size(lg_cur_size, lg_max_size);</div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  ensure_minimum_memory(size, preamble_longs * <span class="keyword">sizeof</span>(uint64_t));</div> |
| <div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  </div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  frequent_items_sketch sketch(lg_max_size, lg_cur_size, equal, allocator);</div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">if</span> (!is_empty) {</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  uint32_t num_items;</div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  ptr += copy_from_mem(ptr, num_items);</div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  ptr += <span class="keyword">sizeof</span>(uint32_t); <span class="comment">// unused</span></div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  W total_weight;</div> |
| <div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  ptr += copy_from_mem(ptr, total_weight);</div> |
| <div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  W offset;</div> |
| <div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  ptr += copy_from_mem(ptr, offset);</div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  </div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  ensure_minimum_memory(size, ptr - base + (<span class="keyword">sizeof</span>(W) * num_items));</div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="comment">// batch deserialization with intermediate array of items and weights</span></div> |
| <div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keyword">using</span> AllocW = <span class="keyword">typename</span> std::allocator_traits<A>::template rebind_alloc<W>;</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  std::vector<W, AllocW> weights(num_items, 0, allocator);</div> |
| <div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  ptr += copy_from_mem(ptr, weights.data(), <span class="keyword">sizeof</span>(W) * num_items);</div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  A alloc(allocator);</div> |
| <div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  std::unique_ptr<T, items_deleter> items(alloc.allocate(num_items), items_deleter(num_items, <span class="keyword">false</span>, alloc));</div> |
| <div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> bytes_remaining = size - (ptr - base);</div> |
| <div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  ptr += sd.deserialize(ptr, bytes_remaining, items.get(), num_items);</div> |
| <div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  items.get_deleter().set_destroy(<span class="keyword">true</span>); <span class="comment">// serde did not throw, so the items must be constructed</span></div> |
| <div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">for</span> (uint32_t i = 0; i < num_items; i++) {</div> |
| <div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  sketch.update(std::move(items.get()[i]), weights[i]);</div> |
| <div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  }</div> |
| <div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  </div> |
| <div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  sketch.total_weight = total_weight;</div> |
| <div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  sketch.offset = offset;</div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div> |
| <div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">return</span> sketch;</div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span> }</div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  </div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_preamble_longs(uint8_t preamble_longs, <span class="keywordtype">bool</span> is_empty) {</div> |
| <div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keywordflow">if</span> (is_empty) {</div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span> (preamble_longs != PREAMBLE_LONGS_EMPTY) {</div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: preamble longs of an empty sketch must be "</span> + std::to_string(PREAMBLE_LONGS_EMPTY) + <span class="stringliteral">": "</span> + std::to_string(preamble_longs));</div> |
| <div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  }</div> |
| <div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keywordflow">if</span> (preamble_longs != PREAMBLE_LONGS_NONEMPTY) {</div> |
| <div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: preamble longs of an non-empty sketch must be "</span> + std::to_string(PREAMBLE_LONGS_NONEMPTY) + <span class="stringliteral">": "</span> + std::to_string(preamble_longs));</div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</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>  </div> |
| <div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_serial_version(uint8_t serial_version) {</div> |
| <div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">if</span> (serial_version != SERIAL_VERSION) {</div> |
| <div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: serial version must be "</span> + std::to_string(SERIAL_VERSION) + <span class="stringliteral">": "</span> + std::to_string(serial_version));</div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  }</div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span> }</div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  </div> |
| <div class="line"><a name="l00415"></a><span class="lineno"> 415</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_family_id(uint8_t family_id) {</div> |
| <div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">if</span> (family_id != FAMILY_ID) {</div> |
| <div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: family ID must be "</span> + std::to_string(FAMILY_ID) + <span class="stringliteral">": "</span> + std::to_string(family_id));</div> |
| <div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div> |
| <div class="line"><a name="l00420"></a><span class="lineno"> 420</span> }</div> |
| <div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  </div> |
| <div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_size(uint8_t lg_cur_size, uint8_t lg_max_size) {</div> |
| <div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span> (lg_cur_size > lg_max_size) {</div> |
| <div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: expected lg_cur_size <= lg_max_size: "</span> + std::to_string(lg_cur_size) + <span class="stringliteral">" <= "</span> + std::to_string(lg_max_size));</div> |
| <div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  }</div> |
| <div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keywordflow">if</span> (lg_cur_size < LG_MIN_MAP_SIZE) {</div> |
| <div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"Possible corruption: lg_cur_size must not be less than "</span> + std::to_string(LG_MIN_MAP_SIZE) + <span class="stringliteral">": "</span> + std::to_string(lg_cur_size));</div> |
| <div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</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>  </div> |
| <div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00433"></a><span class="lineno"><a class="line" href="classdatasketches_1_1frequent__items__sketch.html#a60a5fe73c86554c313705666f8fb227a"> 433</a></span> string<A> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html#a60a5fe73c86554c313705666f8fb227a">frequent_items_sketch<T, W, H, E, A>::to_string</a>(<span class="keywordtype">bool</span> print_items)<span class="keyword"> const </span>{</div> |
| <div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="comment">// Using a temporary stream for implementation here does not comply with AllocatorAwareContainer requirements.</span></div> |
| <div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="comment">// The stream does not support passing an allocator instance, and alternatives are complicated.</span></div> |
| <div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  std::ostringstream os;</div> |
| <div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  os << <span class="stringliteral">"### Frequent items sketch summary:"</span> << std::endl;</div> |
| <div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  os << <span class="stringliteral">" lg cur map size : "</span> << (int) map.get_lg_cur_size() << std::endl;</div> |
| <div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  os << <span class="stringliteral">" lg max map size : "</span> << (int) map.get_lg_max_size() << std::endl;</div> |
| <div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  os << <span class="stringliteral">" num active items : "</span> << get_num_active_items() << std::endl;</div> |
| <div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  os << <span class="stringliteral">" total weight : "</span> << get_total_weight() << std::endl;</div> |
| <div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  os << <span class="stringliteral">" max error : "</span> << get_maximum_error() << std::endl;</div> |
| <div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  os << <span class="stringliteral">"### End sketch summary"</span> << std::endl;</div> |
| <div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span> (print_items) {</div> |
| <div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  vector_row items;</div> |
| <div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: map) {</div> |
| <div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  items.push_back(<a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a>(&it.first, it.second, offset));</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">// sort by estimate in descending order</span></div> |
| <div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  std::sort(items.begin(), items.end(), [](<a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a> a, <a class="code" href="classdatasketches_1_1frequent__items__sketch_1_1row.html">row</a> b){ return a.get_estimate() > b.get_estimate(); });</div> |
| <div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  os << <span class="stringliteral">"### Items in descending order by estimate"</span> << std::endl;</div> |
| <div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  os << <span class="stringliteral">" item, estimate, lower bound, upper bound"</span> << std::endl;</div> |
| <div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it: items) {</div> |
| <div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  os << <span class="stringliteral">" "</span> << it.get_item() << <span class="stringliteral">", "</span> << it.get_estimate() << <span class="stringliteral">", "</span></div> |
| <div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  << it.get_lower_bound() << <span class="stringliteral">", "</span> << it.get_upper_bound() << std::endl;</div> |
| <div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div> |
| <div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  os << <span class="stringliteral">"### End items"</span> << std::endl;</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>  <span class="keywordflow">return</span> string<A>(os.str().c_str(), map.get_allocator());</div> |
| <div class="line"><a name="l00460"></a><span class="lineno"> 460</span> }</div> |
| <div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  </div> |
| <div class="line"><a name="l00462"></a><span class="lineno"> 462</span> <span class="comment">// version for integral signed type</span></div> |
| <div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00464"></a><span class="lineno"> 464</span> template<typename WW, typename std::enable_if<std::is_integral<WW>::value && std::is_signed<WW>::value, <span class="keywordtype">int</span>>::type></div> |
| <div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="keywordtype">void</span> <a class="code" href="classdatasketches_1_1frequent__items__sketch.html">frequent_items_sketch<T, W, H, E, A>::check_weight</a>(WW weight) {</div> |
| <div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">if</span> (weight < 0) {</div> |
| <div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"weight must be non-negative"</span>);</div> |
| <div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  }</div> |
| <div class="line"><a name="l00469"></a><span class="lineno"> 469</span> }</div> |
| <div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  </div> |
| <div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment">// version for integral unsigned type - no-op</span></div> |
| <div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00473"></a><span class="lineno"> 473</span> template<typename WW, typename std::enable_if<std::is_integral<WW>::value && std::is_unsigned<WW>::value, <span class="keywordtype">int</span>>::type></div> |
| <div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_weight(WW) {}</div> |
| <div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  </div> |
| <div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment">// version for floating point type</span></div> |
| <div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="keyword">template</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> W, <span class="keyword">typename</span> H, <span class="keyword">typename</span> E, <span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00478"></a><span class="lineno"> 478</span> template<typename WW, typename std::enable_if<std::is_floating_point<WW>::value, <span class="keywordtype">int</span>>::type></div> |
| <div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="keywordtype">void</span> frequent_items_sketch<T, W, H, E, A>::check_weight(WW weight) {</div> |
| <div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="keywordflow">if</span> (weight < 0) {</div> |
| <div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"weight must be non-negative"</span>);</div> |
| <div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  }</div> |
| <div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">if</span> (std::isnan(weight)) {</div> |
| <div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"weight must be a valid number"</span>);</div> |
| <div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  }</div> |
| <div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keywordflow">if</span> (std::isinf(weight)) {</div> |
| <div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"weight must be finite"</span>);</div> |
| <div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  }</div> |
| <div class="line"><a name="l00489"></a><span class="lineno"> 489</span> }</div> |
| <div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  </div> |
| <div class="line"><a name="l00491"></a><span class="lineno"> 491</span> }</div> |
| <div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  </div> |
| <div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="preprocessor">#endif</span></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_1_1row_html"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch_1_1row.html">datasketches::frequent_items_sketch::row</a></div><div class="ttdoc">Row in the output from get_frequent_items.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch.hpp:330</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html">datasketches::frequent_items_sketch</a></div><div class="ttdoc">Frequent Items sketch.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch.hpp:55</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a225f700985a82a592a6fd7dc685d6044"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a225f700985a82a592a6fd7dc685d6044">datasketches::frequent_items_sketch::frequent_items_sketch</a></div><div class="ttdeci">frequent_items_sketch(uint8_t lg_max_map_size, uint8_t lg_start_map_size=LG_MIN_MAP_SIZE, const E &equal=E(), const A &allocator=A())</div><div class="ttdoc">Construct this sketch with parameters lg_max_map_size and lg_start_map_size.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:37</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a2489b27ac0658fc4151aa98f0fb638f7"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a2489b27ac0658fc4151aa98f0fb638f7">datasketches::frequent_items_sketch::get_upper_bound</a></div><div class="ttdeci">W get_upper_bound(const T &item) const</div><div class="ttdoc">Returns the guaranteed upper bound weight (frequency) of the given item.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:118</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a3384eaa5ad927a987343cdc509bd4f9c"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a3384eaa5ad927a987343cdc509bd4f9c">datasketches::frequent_items_sketch::merge</a></div><div class="ttdeci">void merge(const frequent_items_sketch &other)</div><div class="ttdoc">This function merges the other sketch into this one.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:68</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a538940c100e4353b3671ad452d3d3056"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a538940c100e4353b3671ad452d3d3056">datasketches::frequent_items_sketch::serialize</a></div><div class="ttdeci">void serialize(std::ostream &os, const SerDe &sd=SerDe()) 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> frequent_items_sketch_impl.hpp:165</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a5412230c8878e0cc1be2c6940512f508"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a5412230c8878e0cc1be2c6940512f508">datasketches::frequent_items_sketch::get_frequent_items</a></div><div class="ttdeci">vector_row get_frequent_items(frequent_items_error_type err_type) const</div><div class="ttdoc">Returns an array of rows that include frequent items, estimates, upper and lower bounds given an erro...</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:144</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a5a2b7a58dc85678d08752945ff655362"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a5a2b7a58dc85678d08752945ff655362">datasketches::frequent_items_sketch::is_empty</a></div><div class="ttdeci">bool is_empty() const</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:90</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a60a5fe73c86554c313705666f8fb227a"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a60a5fe73c86554c313705666f8fb227a">datasketches::frequent_items_sketch::to_string</a></div><div class="ttdeci">string< A > to_string(bool print_items=false) const</div><div class="ttdoc">Returns a human readable summary of this sketch.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:433</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a61957693a9a6d2b20882579d40e4f775"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a61957693a9a6d2b20882579d40e4f775">datasketches::frequent_items_sketch::update</a></div><div class="ttdeci">void update(const T &item, W weight=1)</div><div class="ttdoc">Update this sketch with an item and a positive weight (frequency count).</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:52</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a6731cfa90aabc42089e1f449d3aa9a66"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a6731cfa90aabc42089e1f449d3aa9a66">datasketches::frequent_items_sketch::get_apriori_error</a></div><div class="ttdeci">static double get_apriori_error(uint8_t lg_max_map_size, W estimated_total_weight)</div><div class="ttdoc">Returns the estimated a priori error given the max_map_size for the sketch and the estimated_total_st...</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:138</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a68bf5133e42650cdfe20a7916037ab4b"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a68bf5133e42650cdfe20a7916037ab4b">datasketches::frequent_items_sketch::get_total_weight</a></div><div class="ttdeci">W get_total_weight() const</div><div class="ttdoc">Returns the sum of the weights (frequencies) in the stream seen so far by the sketch.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:100</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a7d758ee3fb67c30c547628bd8cc2d266"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a7d758ee3fb67c30c547628bd8cc2d266">datasketches::frequent_items_sketch::get_epsilon</a></div><div class="ttdeci">double get_epsilon() const</div><div class="ttdoc">Returns epsilon value of this sketch.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:128</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_a8762fed25b3024f07989976344dd0afb"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#a8762fed25b3024f07989976344dd0afb">datasketches::frequent_items_sketch::get_serialized_size_bytes</a></div><div class="ttdeci">size_t get_serialized_size_bytes(const SerDe &sd=SerDe()) const</div><div class="ttdoc">Computes size needed to serialize the current state of the sketch.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:212</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_aa6a8295801139cde1c0136867cf1f188"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#aa6a8295801139cde1c0136867cf1f188">datasketches::frequent_items_sketch::get_maximum_error</a></div><div class="ttdeci">W get_maximum_error() const</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:123</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_ab1b012eb1b049bf5a4fd0f02916655a3"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#ab1b012eb1b049bf5a4fd0f02916655a3">datasketches::frequent_items_sketch::get_estimate</a></div><div class="ttdeci">W get_estimate(const T &item) const</div><div class="ttdoc">Returns the estimate of the weight (frequency) of the given item.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:105</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_aba8b57f65dd3f4d47be9aacbb3606118"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#aba8b57f65dd3f4d47be9aacbb3606118">datasketches::frequent_items_sketch::deserialize</a></div><div class="ttdeci">static frequent_items_sketch deserialize(std::istream &is, const SerDe &sd=SerDe(), const E &equal=E(), const A &allocator=A())</div><div class="ttdoc">This method deserializes a sketch from a given stream.</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_aed55e478ed35c861c3351b90c88fdbe7"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#aed55e478ed35c861c3351b90c88fdbe7">datasketches::frequent_items_sketch::get_lower_bound</a></div><div class="ttdeci">W get_lower_bound(const T &item) const</div><div class="ttdoc">Returns the guaranteed lower bound weight (frequency) of the given item.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:113</div></div> |
| <div class="ttc" id="aclassdatasketches_1_1frequent__items__sketch_html_af72439eee5521a156379f0fbd869cb12"><div class="ttname"><a href="classdatasketches_1_1frequent__items__sketch.html#af72439eee5521a156379f0fbd869cb12">datasketches::frequent_items_sketch::get_num_active_items</a></div><div class="ttdeci">uint32_t get_num_active_items() const</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch_impl.hpp:95</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_ae94a02fc822bc3f745ab6ef0ac9c1f0f"><div class="ttname"><a href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0f">datasketches::frequent_items_error_type</a></div><div class="ttdeci">frequent_items_error_type</div><div class="ttdoc">Frequent items error type.</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch.hpp:36</div></div> |
| <div class="ttc" id="anamespacedatasketches_html_ae94a02fc822bc3f745ab6ef0ac9c1f0fa5338495a1938a260d0f0489d35b2e8dd"><div class="ttname"><a href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0fa5338495a1938a260d0f0489d35b2e8dd">datasketches::NO_FALSE_NEGATIVES</a></div><div class="ttdeci">@ NO_FALSE_NEGATIVES</div><div class="ttdoc">include an item in the result list if get_upper_bound(item) > threshold</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch.hpp:38</div></div> |
| <div class="ttc" id="anamespacedatasketches_html_ae94a02fc822bc3f745ab6ef0ac9c1f0fa6f0f5df0005d6b6f0428d126eb0d75e9"><div class="ttname"><a href="namespacedatasketches.html#ae94a02fc822bc3f745ab6ef0ac9c1f0fa6f0f5df0005d6b6f0428d126eb0d75e9">datasketches::NO_FALSE_POSITIVES</a></div><div class="ttdeci">@ NO_FALSE_POSITIVES</div><div class="ttdoc">include an item in the result list if get_lower_bound(item) > threshold</div><div class="ttdef"><b>Definition:</b> frequent_items_sketch.hpp:37</div></div> |
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