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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_66e9674e8206a335795995fa32a03c91.html">entt</a></li><li class="navelem"><a class="el" href="dir_de8f4e6ba3f54a2a21309f742e93a373.html">core</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_CORE_ALGORITHM_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_CORE_ALGORITHM_HPP</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <iterator></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <functional></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "utility.hpp"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"><a class="line" href="namespaceentt.html"> 12</a></span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="structentt_1_1std__sort.html"> 23</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1std__sort.html">std_sort</a> {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It, <span class="keyword">typename</span> Compare = std::less<>, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="structentt_1_1std__sort.html#af25b38ddb03e206a71a1f47521eaea46"> 38</a></span>  <span class="keywordtype">void</span> <a class="code" href="structentt_1_1std__sort.html#af25b38ddb03e206a71a1f47521eaea46">operator()</a>(It first, It last, Compare compare = Compare{}, Args &&... args) <span class="keyword">const</span> {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  std::sort(std::forward<Args>(args)..., std::move(first), std::move(last), std::move(compare));</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> };</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="structentt_1_1insertion__sort.html"> 45</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1insertion__sort.html">insertion_sort</a> {</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It, <span class="keyword">typename</span> Compare = std::less<>></div><div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="structentt_1_1insertion__sort.html#a73a5644fe5b683f9b9376c89ac47f2b8"> 58</a></span>  <span class="keywordtype">void</span> <a class="code" href="structentt_1_1insertion__sort.html#a73a5644fe5b683f9b9376c89ac47f2b8">operator()</a>(It first, It last, Compare compare = Compare{}) <span class="keyword">const</span> {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">if</span>(first < last) {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> it = first+1; it < last; ++it) {</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">auto</span> value = std::move(*it);</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">auto</span> pre = it;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">for</span>(; pre > first && compare(value, *(pre-1)); --pre) {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  *pre = std::move(*(pre-1));</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> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  *pre = std::move(value);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> };</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> Bit, std::<span class="keywordtype">size_t</span> N></div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="structentt_1_1radix__sort.html"> 81</a></span> <span class="keyword">struct </span><a class="code" href="structentt_1_1radix__sort.html">radix_sort</a> {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  static_assert((N % Bit) == 0);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It, <span class="keyword">typename</span> Getter = <span class="keywordtype">id</span>entity></div><div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="structentt_1_1radix__sort.html#a1989f6fbe18d3d82fdea9745d6b9ee96"> 100</a></span>  <span class="keywordtype">void</span> <a class="code" href="structentt_1_1radix__sort.html#a1989f6fbe18d3d82fdea9745d6b9ee96">operator()</a>(It first, It last, Getter getter = Getter{}) <span class="keyword">const</span> {</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span>(first < last) {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> mask = (1 << Bit) - 1;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> buckets = 1 << Bit;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">static</span> constexpr <span class="keyword">auto</span> passes = N / Bit;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">using</span> value_type = <span class="keyword">typename</span> std::iterator_traits<It>::value_type;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  std::vector<value_type> aux(std::distance(first, last));</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">auto</span> part = [getter = std::move(getter)](<span class="keyword">auto</span> from, <span class="keyword">auto</span> to, <span class="keyword">auto</span> out, <span class="keyword">auto</span> start) {</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  std::size_t index[buckets]{};</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  std::size_t count[buckets]{};</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  std::for_each(from, to, [&getter, &count, start](<span class="keyword">const</span> value_type &item) {</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  ++count[(getter(item) >> start) & mask];</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>  std::for_each(std::next(std::begin(index)), std::end(index), [index = std::begin(index), count = std::begin(count)](<span class="keyword">auto</span> &item) <span class="keyword">mutable</span> {</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  item = *(index++) + *(count++);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  });</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  std::for_each(from, to, [&getter, &out, &index, start](value_type &item) {</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  out[index[(getter(item) >> start) & mask]++] = std::move(item);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  });</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  };</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">for</span>(std::size_t pass = 0; pass < (passes & ~1); pass += 2) {</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  part(first, last, aux.begin(), pass * Bit);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  part(aux.begin(), aux.end(), first, (pass + 1) * Bit);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> constexpr(passes & 1) {</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  part(first, last, aux.begin(), (passes - 1) * Bit);</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  std::move(aux.begin(), aux.end(), first);</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</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> };</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</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="preprocessor">#endif // ENTT_CORE_ALGORITHM_HPP</span></div><div class="ttc" id="structentt_1_1radix__sort_html_a1989f6fbe18d3d82fdea9745d6b9ee96"><div class="ttname"><a href="structentt_1_1radix__sort.html#a1989f6fbe18d3d82fdea9745d6b9ee96">entt::radix_sort::operator()</a></div><div class="ttdeci">void operator()(It first, It last, Getter getter=Getter{}) const</div><div class="ttdoc">Sorts the elements in a range. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00100">algorithm.hpp:100</a></div></div>
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<div class="ttc" id="namespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00012">algorithm.hpp:12</a></div></div>
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<div class="ttc" id="structentt_1_1std__sort_html_af25b38ddb03e206a71a1f47521eaea46"><div class="ttname"><a href="structentt_1_1std__sort.html#af25b38ddb03e206a71a1f47521eaea46">entt::std_sort::operator()</a></div><div class="ttdeci">void operator()(It first, It last, Compare compare=Compare{}, Args &&... args) const</div><div class="ttdoc">Sorts the elements in a range. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00038">algorithm.hpp:38</a></div></div>
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<div class="ttc" id="structentt_1_1insertion__sort_html_a73a5644fe5b683f9b9376c89ac47f2b8"><div class="ttname"><a href="structentt_1_1insertion__sort.html#a73a5644fe5b683f9b9376c89ac47f2b8">entt::insertion_sort::operator()</a></div><div class="ttdeci">void operator()(It first, It last, Compare compare=Compare{}) const</div><div class="ttdoc">Sorts the elements in a range. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00058">algorithm.hpp:58</a></div></div>
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<div class="ttc" id="structentt_1_1std__sort_html"><div class="ttname"><a href="structentt_1_1std__sort.html">entt::std_sort</a></div><div class="ttdoc">Function object to wrap std::sort in a class type. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00023">algorithm.hpp:23</a></div></div>
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<div class="ttc" id="structentt_1_1radix__sort_html"><div class="ttname"><a href="structentt_1_1radix__sort.html">entt::radix_sort</a></div><div class="ttdoc">Function object for performing LSD radix sort. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00081">algorithm.hpp:81</a></div></div>
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<div class="ttc" id="structentt_1_1insertion__sort_html"><div class="ttname"><a href="structentt_1_1insertion__sort.html">entt::insertion_sort</a></div><div class="ttdoc">Function object for performing insertion sort. </div><div class="ttdef"><b>Definition:</b> <a href="algorithm_8hpp_source.html#l00045">algorithm.hpp:45</a></div></div>
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