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| <div class="title">u32_table.hpp</div> </div> |
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| <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * distributed with this work for additional information</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * "License"); you may not use this file except in compliance</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * with the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * software distributed under the License is distributed on an</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * KIND, either express or implied. See the License for the</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * specific language governing permissions and limitations</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * under the License.</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// author Kevin Lang, Oath Research</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  </div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifndef U32_TABLE_HPP_</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#define U32_TABLE_HPP_</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  </div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// This is a highly specialized hash table that was designed</span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// to be a part of the library's CPC sketch implementation</span></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "cpc_common.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="keyword">static</span> <span class="keyword">const</span> uint32_t U32_TABLE_UPSIZE_NUMER = 3LL;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">static</span> <span class="keyword">const</span> uint32_t U32_TABLE_UPSIZE_DENOM = 4LL;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">static</span> <span class="keyword">const</span> uint32_t U32_TABLE_DOWNSIZE_NUMER = 1LL;</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">static</span> <span class="keyword">const</span> uint32_t U32_TABLE_DOWNSIZE_DENOM = 4LL;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">template</span><<span class="keyword">typename</span> A></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">class </span>u32_table {</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">public</span>:</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">using</span> vector_u32 = std::vector<uint32_t, typename std::allocator_traits<A>::template rebind_alloc<uint32_t>>;</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  u32_table(<span class="keyword">const</span> A& allocator);</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  u32_table(uint8_t lg_size, uint8_t num_valid_bits, <span class="keyword">const</span> A& allocator);</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">inline</span> uint32_t get_num_items() <span class="keyword">const</span>;</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">inline</span> <span class="keyword">const</span> uint32_t* get_slots() <span class="keyword">const</span>;</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">inline</span> uint8_t get_lg_size() <span class="keyword">const</span>;</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> clear();</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="comment">// returns true iff the item was new and was therefore added to the table</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> maybe_insert(uint32_t item);</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">// returns true iff the item was present and was therefore removed from the table</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> maybe_delete(uint32_t item);</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">static</span> u32_table make_from_pairs(<span class="keyword">const</span> uint32_t* pairs, uint32_t num_pairs, uint8_t lg_k, <span class="keyword">const</span> A& allocator);</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>  vector_u32 unwrapping_get_items() <span class="keyword">const</span>;</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> merge(</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">const</span> uint32_t* arr_a, <span class="keywordtype">size_t</span> start_a, <span class="keywordtype">size_t</span> length_a, <span class="comment">// input</span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">const</span> uint32_t* arr_b, <span class="keywordtype">size_t</span> start_b, <span class="keywordtype">size_t</span> length_b, <span class="comment">// input</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  uint32_t* arr_c, <span class="keywordtype">size_t</span> start_c <span class="comment">// output</span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  );</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> introspective_insertion_sort(uint32_t* a, <span class="keywordtype">size_t</span> l, <span class="keywordtype">size_t</span> r);</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> knuth_shell_sort3(uint32_t* a, <span class="keywordtype">size_t</span> l, <span class="keywordtype">size_t</span> r);</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">private</span>:</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  uint8_t lg_size; <span class="comment">// log2 of number of slots</span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  uint8_t num_valid_bits;</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  uint32_t num_items;</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  vector_u32 slots;</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">inline</span> uint32_t lookup(uint32_t item) <span class="keyword">const</span>;</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> must_insert(uint32_t item);</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> rebuild(uint8_t new_lg_size);</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> };</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> } <span class="comment">/* namespace datasketches */</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#include "u32_table_impl.hpp"</span></div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#endif</span></div> |
| <div class="ttc" id="anamespacedatasketches_html"><div class="ttname"><a href="namespacedatasketches.html">datasketches</a></div><div class="ttdoc">DataSketches namespace.</div><div class="ttdef"><b>Definition:</b> binomial_bounds.hpp:38</div></div> |
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