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| <li class="navelem"><a class="el" href="dir_bdd9a5d540de89e9fe90efdfc6973a4f.html">common</a></li><li class="navelem"><a class="el" href="dir_11fbc4217d50ab21044e5ad6614aede5.html">include</a></li> </ul> |
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| <div class="headertitle"><div class="title">xxhash64.h</div></div> |
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| <div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// //////////////////////////////////////////////////////////</span></div> |
| <div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// xxhash64.h</span></div> |
| <div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// Copyright (c) 2016 Stephan Brumme. All rights reserved.</span></div> |
| <div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// see http://create.stephan-brumme.com/disclaimer.html</span></div> |
| <div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div> |
| <div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div> |
| <div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#pragma once</span></div> |
| <div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include <stdint.h></span> <span class="comment">// for uint32_t and uint64_t</span></div> |
| <div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> </div> |
| <div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div> |
| <div class="foldopen" id="foldopen00024" data-start="{" data-end="};"> |
| <div class="line"><a id="l00024" name="l00024"></a><span class="lineno"><a class="line" href="classXXHash64.html"> 24</a></span><span class="keyword">class </span><a class="code hl_class" href="classXXHash64.html">XXHash64</a></div> |
| <div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span>{</div> |
| <div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">public</span>:</div> |
| <div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div> |
| <div class="foldopen" id="foldopen00029" data-start="{" data-end="}"> |
| <div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="classXXHash64.html#aa066dac9f05cdf8b1adb49e12c64f54b"> 29</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classXXHash64.html#aa066dac9f05cdf8b1adb49e12c64f54b">XXHash64</a>(uint64_t seed)</div> |
| <div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> {</div> |
| <div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> state[0] = seed + Prime1 + Prime2;</div> |
| <div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> state[1] = seed + Prime2;</div> |
| <div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> state[2] = seed;</div> |
| <div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> state[3] = seed - Prime1;</div> |
| <div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> bufferSize = 0;</div> |
| <div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> totalLength = 0;</div> |
| <div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div> |
| </div> |
| <div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div> |
| <div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div> |
| <div class="foldopen" id="foldopen00043" data-start="{" data-end="}"> |
| <div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="classXXHash64.html#aa231dc8a2cb1804f69c1187e09ef5d69"> 43</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classXXHash64.html#aa231dc8a2cb1804f69c1187e09ef5d69">add</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* input, uint64_t length)</div> |
| <div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> {</div> |
| <div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// no data ?</span></div> |
| <div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">if</span> (!input || length == 0)</div> |
| <div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div> |
| <div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> totalLength += length;</div> |
| <div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// byte-wise access</span></div> |
| <div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* data = (<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)input;</div> |
| <div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// unprocessed old data plus new data still fit in temporary buffer ?</span></div> |
| <div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">if</span> (bufferSize + length < MaxBufferSize)</div> |
| <div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> {</div> |
| <div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="comment">// just add new data</span></div> |
| <div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">while</span> (length-- > 0)</div> |
| <div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> buffer[bufferSize++] = *data++;</div> |
| <div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> }</div> |
| <div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> </div> |
| <div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// point beyond last byte</span></div> |
| <div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* stop = data + length;</div> |
| <div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* stopBlock = stop - MaxBufferSize;</div> |
| <div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> </div> |
| <div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// some data left from previous update ?</span></div> |
| <div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">if</span> (bufferSize > 0)</div> |
| <div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> {</div> |
| <div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// make sure temporary buffer is full (16 bytes)</span></div> |
| <div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">while</span> (bufferSize < MaxBufferSize)</div> |
| <div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> buffer[bufferSize++] = *data++;</div> |
| <div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div> |
| <div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// process these 32 bytes (4x8)</span></div> |
| <div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> process(buffer, state[0], state[1], state[2], state[3]);</div> |
| <div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div> |
| <div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div> |
| <div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// copying state to local variables helps optimizer A LOT</span></div> |
| <div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> uint64_t s0 = state[0], s1 = state[1], s2 = state[2], s3 = state[3];</div> |
| <div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// 32 bytes at once</span></div> |
| <div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">while</span> (data <= stopBlock)</div> |
| <div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> {</div> |
| <div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="comment">// local variables s0..s3 instead of state[0]..state[3] are much faster</span></div> |
| <div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> process(data, s0, s1, s2, s3);</div> |
| <div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> data += 32;</div> |
| <div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div> |
| <div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="comment">// copy back</span></div> |
| <div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> state[0] = s0; state[1] = s1; state[2] = s2; state[3] = s3;</div> |
| <div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div> |
| <div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="comment">// copy remainder to temporary buffer</span></div> |
| <div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> bufferSize = stop - data;</div> |
| <div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="keywordflow">for</span> (uint64_t i = 0; i < bufferSize; i++)</div> |
| <div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> buffer[i] = data[i];</div> |
| <div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> </div> |
| <div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// done</span></div> |
| <div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> }</div> |
| </div> |
| <div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> </div> |
| <div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> </div> |
| <div class="foldopen" id="foldopen00100" data-start="{" data-end="}"> |
| <div class="line"><a id="l00100" name="l00100"></a><span class="lineno"><a class="line" href="classXXHash64.html#a35b9406690383f9b794082192db9f109"> 100</a></span> uint64_t <a class="code hl_function" href="classXXHash64.html#a35b9406690383f9b794082192db9f109">hash</a>()<span class="keyword"> const</span></div> |
| <div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span><span class="keyword"> </span>{</div> |
| <div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// fold 256 bit state into one single 64 bit value</span></div> |
| <div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> uint64_t result;</div> |
| <div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">if</span> (totalLength >= MaxBufferSize)</div> |
| <div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> {</div> |
| <div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> result = rotateLeft(state[0], 1) +</div> |
| <div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> rotateLeft(state[1], 7) +</div> |
| <div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> rotateLeft(state[2], 12) +</div> |
| <div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> rotateLeft(state[3], 18);</div> |
| <div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> result = (result ^ processSingle(0, state[0])) * Prime1 + Prime4;</div> |
| <div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> result = (result ^ processSingle(0, state[1])) * Prime1 + Prime4;</div> |
| <div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> result = (result ^ processSingle(0, state[2])) * Prime1 + Prime4;</div> |
| <div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> result = (result ^ processSingle(0, state[3])) * Prime1 + Prime4;</div> |
| <div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> }</div> |
| <div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">else</span></div> |
| <div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> {</div> |
| <div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="comment">// internal state wasn't set in add(), therefore original seed is still stored in state2</span></div> |
| <div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> result = state[2] + Prime5;</div> |
| <div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> }</div> |
| <div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> </div> |
| <div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> result += totalLength;</div> |
| <div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> </div> |
| <div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="comment">// process remaining bytes in temporary buffer</span></div> |
| <div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* data = buffer;</div> |
| <div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// point beyond last byte</span></div> |
| <div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* stop = data + bufferSize;</div> |
| <div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> </div> |
| <div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="comment">// at least 8 bytes left ? => eat 8 bytes per step</span></div> |
| <div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="keywordflow">for</span> (; data + 8 <= stop; data += 8)</div> |
| <div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> result = rotateLeft(result ^ processSingle(0, *(uint64_t*)data), 27) * Prime1 + Prime4;</div> |
| <div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> </div> |
| <div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="comment">// 4 bytes left ? => eat those</span></div> |
| <div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keywordflow">if</span> (data + 4 <= stop)</div> |
| <div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> {</div> |
| <div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> result = rotateLeft(result ^ (*(uint32_t*)data) * Prime1, 23) * Prime2 + Prime3;</div> |
| <div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> data += 4;</div> |
| <div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> }</div> |
| <div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> </div> |
| <div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="comment">// take care of remaining 0..3 bytes, eat 1 byte per step</span></div> |
| <div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <span class="keywordflow">while</span> (data != stop)</div> |
| <div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> result = rotateLeft(result ^ (*data++) * Prime5, 11) * Prime1;</div> |
| <div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> </div> |
| <div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// mix bits</span></div> |
| <div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> result ^= result >> 33;</div> |
| <div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> result *= Prime2;</div> |
| <div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> result ^= result >> 29;</div> |
| <div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> result *= Prime3;</div> |
| <div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> result ^= result >> 32;</div> |
| <div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <span class="keywordflow">return</span> result;</div> |
| <div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> }</div> |
| </div> |
| <div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div> |
| <div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> </div> |
| <div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div> |
| <div class="foldopen" id="foldopen00158" data-start="{" data-end="}"> |
| <div class="line"><a id="l00158" name="l00158"></a><span class="lineno"><a class="line" href="classXXHash64.html#a725b2abf9eb0d100fc6a53d63fbfe2ef"> 158</a></span> <span class="keyword">static</span> uint64_t <a class="code hl_function" href="classXXHash64.html#a725b2abf9eb0d100fc6a53d63fbfe2ef">hash</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* input, uint64_t length, uint64_t seed)</div> |
| <div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> {</div> |
| <div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <a class="code hl_class" href="classXXHash64.html">XXHash64</a> hasher(seed);</div> |
| <div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> hasher.<a class="code hl_function" href="classXXHash64.html#aa231dc8a2cb1804f69c1187e09ef5d69">add</a>(input, length);</div> |
| <div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <span class="keywordflow">return</span> hasher.<a class="code hl_function" href="classXXHash64.html#a35b9406690383f9b794082192db9f109">hash</a>();</div> |
| <div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> }</div> |
| </div> |
| <div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> </div> |
| <div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span><span class="keyword">private</span>:</div> |
| <div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t Prime1 = 11400714785074694791ULL;</div> |
| <div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t Prime2 = 14029467366897019727ULL;</div> |
| <div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t Prime3 = 1609587929392839161ULL;</div> |
| <div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t Prime4 = 9650029242287828579ULL;</div> |
| <div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t Prime5 = 2870177450012600261ULL;</div> |
| <div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> </div> |
| <div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <span class="keyword">static</span> <span class="keyword">const</span> uint64_t MaxBufferSize = 31+1;</div> |
| <div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> </div> |
| <div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> uint64_t state[4];</div> |
| <div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buffer[MaxBufferSize];</div> |
| <div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> uint64_t bufferSize;</div> |
| <div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> uint64_t totalLength;</div> |
| <div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> </div> |
| <div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t rotateLeft(uint64_t x, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> bits)</div> |
| <div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> {</div> |
| <div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> <span class="keywordflow">return</span> (x << bits) | (x >> (64 - bits));</div> |
| <div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> }</div> |
| <div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> </div> |
| <div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t processSingle(uint64_t previous, uint64_t input)</div> |
| <div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> {</div> |
| <div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <span class="keywordflow">return</span> rotateLeft(previous + input * Prime2, 31) * Prime1;</div> |
| <div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> }</div> |
| <div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> </div> |
| <div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> process(<span class="keyword">const</span> <span class="keywordtype">void</span>* data, uint64_t& state0, uint64_t& state1, uint64_t& state2, uint64_t& state3)</div> |
| <div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> {</div> |
| <div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">const</span> uint64_t* block = (<span class="keyword">const</span> uint64_t*) data;</div> |
| <div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> state0 = processSingle(state0, block[0]);</div> |
| <div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> state1 = processSingle(state1, block[1]);</div> |
| <div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> state2 = processSingle(state2, block[2]);</div> |
| <div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> state3 = processSingle(state3, block[3]);</div> |
| <div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> }</div> |
| <div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span>};</div> |
| </div> |
| <div class="ttc" id="aclassXXHash64_html"><div class="ttname"><a href="classXXHash64.html">XXHash64</a></div><div class="ttdoc">XXHash (64 bit), based on Yann Collet's descriptions, see http://cyan4973.github.io/xxHash/.</div><div class="ttdef"><b>Definition</b> xxhash64.h:25</div></div> |
| <div class="ttc" id="aclassXXHash64_html_a35b9406690383f9b794082192db9f109"><div class="ttname"><a href="classXXHash64.html#a35b9406690383f9b794082192db9f109">XXHash64::hash</a></div><div class="ttdeci">uint64_t hash() const</div><div class="ttdoc">get current hash</div><div class="ttdef"><b>Definition</b> xxhash64.h:100</div></div> |
| <div class="ttc" id="aclassXXHash64_html_a725b2abf9eb0d100fc6a53d63fbfe2ef"><div class="ttname"><a href="classXXHash64.html#a725b2abf9eb0d100fc6a53d63fbfe2ef">XXHash64::hash</a></div><div class="ttdeci">static uint64_t hash(const void *input, uint64_t length, uint64_t seed)</div><div class="ttdoc">combine constructor, add() and hash() in one static function (C style)</div><div class="ttdef"><b>Definition</b> xxhash64.h:158</div></div> |
| <div class="ttc" id="aclassXXHash64_html_aa066dac9f05cdf8b1adb49e12c64f54b"><div class="ttname"><a href="classXXHash64.html#aa066dac9f05cdf8b1adb49e12c64f54b">XXHash64::XXHash64</a></div><div class="ttdeci">XXHash64(uint64_t seed)</div><div class="ttdoc">create new XXHash (64 bit)</div><div class="ttdef"><b>Definition</b> xxhash64.h:29</div></div> |
| <div class="ttc" id="aclassXXHash64_html_aa231dc8a2cb1804f69c1187e09ef5d69"><div class="ttname"><a href="classXXHash64.html#aa231dc8a2cb1804f69c1187e09ef5d69">XXHash64::add</a></div><div class="ttdeci">bool add(const void *input, uint64_t length)</div><div class="ttdoc">add a chunk of bytes</div><div class="ttdef"><b>Definition</b> xxhash64.h:43</div></div> |
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