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<div class="headertitle"><div class="title">chrono.hpp</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>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> SPDX-License-Identifier: MIT</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> Copyright © 2023 Amebis</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">*/</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#pragma once</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include "sal.hpp"</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include "system.hpp"</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include <stdint.h></span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include <chrono></span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include <stdexcept></span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="keyword">namespace </span>stdex {</div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>chrono</div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> {</div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"><a class="line" href="structstdex_1_1chrono_1_1aosn__clock.html"> 17</a></span> <span class="keyword">struct </span><a class="code hl_struct" href="structstdex_1_1chrono_1_1aosn__clock.html">aosn_clock</a></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> {</div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">using </span>rep = int64_t;</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">using </span>period = std::ratio<1, 1'000'000>; <span class="comment">// 1 microsecond</span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">using </span>duration = std::chrono::duration<rep, period>;</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using </span>time_point = std::chrono::time_point<aosn_clock>;</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keywordtype">bool</span> is_steady = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep f_second = 1000; <span class="comment">// number of milliseconds per second</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep f_minute = 60; <span class="comment">// number of seconds per minute</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep f_hour = 60; <span class="comment">// number of minutes na hour</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep f_day = 24; <span class="comment">// number of hours na day</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep f_week = 7; <span class="comment">// number of days per week</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep second = f_second; <span class="comment">// number of milliseconds per second</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep minute = f_minute * second; <span class="comment">// number of milliseconds per minute</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep hour = f_hour * minute; <span class="comment">// number of milliseconds per hour</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep day = f_day * hour; <span class="comment">// number of milliseconds per day</span></div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> rep week = f_week * day; <span class="comment">// number of milliseconds per week</span></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"><a class="line" href="structstdex_1_1chrono_1_1aosn__clock.html#af186981246295f8d1a41784802b0f0f2"> 40</a></span> <span class="keyword">static</span> time_point <a class="code hl_function" href="structstdex_1_1chrono_1_1aosn__clock.html#af186981246295f8d1a41784802b0f0f2">now</a>() noexcept</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> {</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="preprocessor">#ifdef _WIN32</span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> FILETIME t;</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> GetSystemTimeAsFileTime(&t);</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">return</span> from_system(t);</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="preprocessor">#else</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> time_t t;</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> time(&t);</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">return</span> from_time_t(t);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t now_jul(_Out_opt_ uint32_t* hour = <span class="keyword">nullptr</span>) noexcept</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> {</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="preprocessor">#ifdef _WIN32</span></div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> SYSTEMTIME t;</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> GetSystemTime(&t);</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> duration tp = from_system(t).time_since_epoch();</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="preprocessor">#else</span></div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">struct </span>timespec t;</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> clock_gettime(CLOCK_REALTIME, &t);</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> duration tp = from_system(t).time_since_epoch();</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">if</span> (hour)</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> *hour = (uint32_t)(tp.count() % day);</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> (uint32_t)(tp.count() / day);</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> }</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">static</span> int32_t gre2jul(_In_ uint8_t day, _In_ uint8_t month, _In_ int32_t year) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> {</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> int32_t mtmp, ytmp;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">if</span> (month > 2) {</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> mtmp = month - 3;</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> ytmp = year;</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> mtmp = month + 9;</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> ytmp = year - 1;</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> }</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> </div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> int32_t ctmp = (ytmp / 100);</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> int32_t dtmp = ytmp - (100 * ctmp);</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> int32_t result1 = 146097L * ctmp / 4;</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> int32_t result2 = (1461 * dtmp) / 4;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> int32_t result3 = (153 * mtmp + 2) / 5;</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">return</span> (int32_t)result1 + day + result2 + 1721119L + result3;</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">static</span> <span class="keywordtype">void</span> jul2gre(_In_ int32_t jul, _Out_opt_ uint8_t* day, _Out_opt_ uint8_t* month, _Out_opt_ int32_t* year) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> {</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> int32_t mtmp = jul - 1721119L;</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> int32_t yr = (4 * mtmp - 1) / 146097L;</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> mtmp = 4 * mtmp - 1 - 146097L * yr;</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> int32_t da = mtmp / 4;</div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> mtmp = (4 * da + 3) / 1461;</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> da = 4 * da + 3 - 1461 * mtmp;</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> da = (da + 4) / 4;</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> int32_t mo = (5 * da - 3) / 153;</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> da = 5 * da - 3 - 153 * mo;</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> da = (da + 5) / 5;</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> yr = 100 * yr + mtmp;</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">if</span> (mo < 10)</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> mo += 3;</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> mo -= 9;</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> yr++;</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> }</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> </div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordflow">if</span> (day) *day = <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(da);</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="keywordflow">if</span> (month) *month = <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(mo);</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">if</span> (year) *year = yr;</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> }</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> </div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">static</span> __time64_t to_time_t(_In_ <span class="keyword">const</span> time_point& tp) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> {</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordflow">return</span> tp.time_since_epoch().count() / second - 210866803200;</div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> }</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> </div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">static</span> time_point from_time_t(_In_ __time64_t t) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> {</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keywordflow">return</span> time_point(duration(((rep)t + 210866803200) * second));</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> }</div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span><span class="preprocessor">#ifdef _WIN32</span></div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">static</span> time_point from_system(_In_ <span class="keyword">const</span> SYSTEMTIME& t) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {</div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="keywordflow">return</span> time_point(duration(</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> ((rep)gre2jul((uint8_t)t.wDay, (uint8_t)t.wMonth, (int32_t)t.wYear)) * day +</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> ((rep)t.wHour * hour + (rep)t.wMinute * minute + (rep)t.wSecond * second + t.wMilliseconds)));</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> }</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> </div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">static</span> time_point from_system(_In_ <span class="keyword">const</span> FILETIME& t) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> {</div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> rep x = (((rep)t.dwHighDateTime) << 32) | t.dwLowDateTime;</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keywordflow">return</span> time_point(duration(x / 10000 + 199222329600000)); <span class="comment">// Convert from 100 ns to 1 ms interval and adjust epoch</span></div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> }</div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> </div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <span class="keyword">static</span> time_point from_system(_In_ DATE t)</div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> {</div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> SYSTEMTIME st;</div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keywordflow">if</span> (!VariantTimeToSystemTime(t, &st))</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"failed to convert date from VARIANT_DATE"</span>);</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <span class="keywordflow">return</span> from_system(st);</div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> }</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="preprocessor">#else</span></div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <span class="keyword">static</span> time_point from_system(_In_ <span class="keyword">const</span> <span class="keyword">struct</span> timespec& t) <span class="keyword">noexcept</span></div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> {</div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="keywordflow">return</span> from_time_t(t.tv_sec) + t.tv_nsec / 1000;</div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> }</div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> };</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> }</div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span>}</div>
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<div class="ttc" id="astructstdex_1_1chrono_1_1aosn__clock_html"><div class="ttname"><a href="structstdex_1_1chrono_1_1aosn__clock.html">stdex::chrono::aosn_clock</a></div><div class="ttdef"><b>Definition</b> chrono.hpp:18</div></div>
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<div class="ttc" id="astructstdex_1_1chrono_1_1aosn__clock_html_af186981246295f8d1a41784802b0f0f2"><div class="ttname"><a href="structstdex_1_1chrono_1_1aosn__clock.html#af186981246295f8d1a41784802b0f0f2">stdex::chrono::aosn_clock::now</a></div><div class="ttdeci">static time_point now() noexcept</div><div class="ttdoc">Gets current time.</div><div class="ttdef"><b>Definition</b> chrono.hpp:40</div></div>
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