klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
90010113ddacfb181cc4cfa007fb53634e2bc12c
hustoj/web/cppreference-zh/chmhelp/c-chrono-gmtime.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

202 lines
13 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>gmtime, gmtime_r, gmtime_s</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_chrono_gmtime skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading">gmtime, gmtime_r, gmtime_s</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-chrono.html">chrono</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dsc-header">
<td>
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;time.h&gt;</code></div>
</td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl">
<td>
<div><span class="mw-geshi c source-c"><span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> <span class="sy2">*</span>gmtime &nbsp;<span class="br0">(</span> <span class="kw4">const</span> <a href="c-chrono-time_t.html"><span class="kw523">time_t</span></a> <span class="sy2">*</span>timer <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td>(1)</td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl t-since-c23">
<td>
<div><span class="mw-geshi c source-c"><span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> <span class="sy2">*</span>gmtime_r<span class="br0">(</span> <span class="kw4">const</span> <a href="c-chrono-time_t.html"><span class="kw523">time_t</span></a> <span class="sy2">*</span>timer, <span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> <span class="sy2">*</span>buf <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td>(2)</td>
<td><span class="t-mark-rev t-since-c23">(C23 &#36215;)</span></td>
</tr>
<tr class="t-dcl t-since-c11">
<td>
<div><span class="mw-geshi c source-c"><span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> <span class="sy2">*</span>gmtime_s<span class="br0">(</span> <span class="kw4">const</span> <a href="c-chrono-time_t.html"><span class="kw523">time_t</span></a> <span class="sy2">*</span><span class="kw4">restrict</span> timer, <span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> <span class="sy2">*</span><span class="kw4">restrict</span> buf <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td>(3)</td>
<td><span class="t-mark-rev t-since-c11">(C11 &#36215;)</span></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<div class="t-li1"><span class="t-li">1)</span> &#36716;&#25442;&#20174;&#32426;&#20803;&#24320;&#22987;&#30340;&#32473;&#23450;&#26102;&#38388;&#65288; <code>time</code> &#25152;&#25351;&#21521;&#30340; <span class="t-lc"><a href="c-chrono-time_t.html">time_t</a></span> &#30340;&#20540;&#65289;&#65292;&#20197; <a href="c-chrono-tm.html">struct tm</a> &#26684;&#24335;&#34920;&#31034;&#25104;&#21327;&#35843;&#19990;&#30028;&#26102;&#65288; UTC &#65289;&#12290;&#23384;&#20648;&#32467;&#26524;&#20110;&#38745;&#24577;&#23384;&#20648;&#65292;&#24182;&#36820;&#22238;&#25351;&#21521;&#38745;&#24577;&#23384;&#20648;&#30340;&#25351;&#38024;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#21516; <span class="t-v">(1)</span> &#65292;&#38500;&#20102;&#20989;&#25968;&#20351;&#29992;&#29992;&#25143;&#20026;&#32467;&#26524;&#25552;&#20379;&#30340;&#23384;&#20648; <code>buf</code> &#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> &#21516; <span class="t-v">(1)</span> &#65292;&#38500;&#20102;&#20989;&#25968;&#20351;&#29992;&#29992;&#25143;&#20026;&#32467;&#26524;&#25552;&#20379;&#30340;&#23384;&#20648; <code>buf</code> &#65292;&#36824;&#22312;&#36816;&#34892;&#26102;&#26816;&#27979;&#19979;&#21015;&#38169;&#35823;&#65292;&#24182;&#35843;&#29992;&#24403;&#21069;&#23433;&#35013;&#30340;<a href="c-error-set_constraint_handler_s.html">&#21046;&#32422;&#22788;&#29702;</a>&#20989;&#25968;&#65306;
<dl>
<dd>
<ul>
<li><code>timer</code> &#25110; <code>buf</code> &#26159;&#31354;&#25351;&#38024;</li>
</ul>
</dd>
<dd>&#21516;&#25152;&#26377;&#36793;&#30028;&#26816;&#26597;&#20989;&#25968;&#65292; <code>gmtime_s</code> &#20165;&#33509;&#23454;&#29616;&#23450;&#20041; <span class="t-c"><span class="mw-geshi c source-c">__STDC_LIB_EXT1__</span></span> &#19988;&#29992;&#25143;&#22312;&#21253;&#21547; <code>time.h</code> &#21069;&#23450;&#20041; <span class="t-c"><span class="mw-geshi c source-c">__STDC_WANT_LIB_EXT1__</span></span> &#20026;&#25972;&#25968;&#24120;&#37327; 1 &#25165;&#20445;&#35777;&#21487;&#29992;&#12290;</dd>
</dl>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>timer</td>
<td>-</td>
<td>&#25351;&#21521;&#35201;&#36716;&#25442;&#30340; <code>time_t</code> &#23545;&#35937;&#30340;&#25351;&#38024;</td>
</tr>
<tr class="t-par">
<td>buf</td>
<td>-</td>
<td>&#25351;&#21521;&#35201;&#23384;&#20648;&#32467;&#26524;&#30340; <code>struct tm</code> &#23545;&#35937;&#30340;&#25351;&#38024;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<div class="t-li1"><span class="t-li">1)</span> &#25104;&#21151;&#26102;&#36820;&#22238;&#25351;&#21521;&#38745;&#24577;&#30340;&#20869;&#37096; <span class="t-lc">struct tm</span> &#23545;&#35937;&#30340;&#25351;&#38024;&#65292;&#22833;&#36133;&#26102;&#36820;&#22238;&#31354;&#25351;&#38024;&#12290;&#35813;&#32467;&#26500;&#20307;&#21487;&#33021;&#20250;&#20026; <code>gmtime</code> &#12289; <span class="t-lc"><a href="c-chrono-localtime.html">localtime</a></span> &#20197;&#21450; <span class="t-lc"><a href="c-chrono-ctime.html">ctime</a></span> &#25152;&#20849;&#20139;&#65292;&#24182;&#20110;&#27599;&#27425;&#35843;&#29992;&#26102;&#34987;&#35206;&#30422;&#12290;</div>
<div class="t-li1"><span class="t-li">2-3)</span> &#25104;&#21151;&#26102;&#36820;&#22238; <code>buf</code> &#25351;&#38024;&#30340;&#21103;&#26412;&#65292;&#38169;&#35823;&#26102;&#36820;&#22238;&#31354;&#25351;&#38024;&#65288;&#21487;&#33021;&#26159;&#19968;&#20010;&#36816;&#34892;&#26102;&#21046;&#32422;&#36829;&#35268;&#25110;&#23545;&#25351;&#23450;&#26102;&#38388;&#21040; UTC &#30340;&#36716;&#25442;&#22833;&#36133;&#65289;&#12290;</div>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#20989;&#25968; <code>gmtime</code> &#21487;&#33021;&#19981;&#26159;&#32447;&#31243;&#23433;&#20840;&#30340;&#12290;</p>
<p>POSIX &#35201;&#27714; <code>gmtime</code> &#19982; <code>gmtime_r</code> &#20989;&#25968;&#33509;&#22240;&#21442;&#25968;&#36807;&#22823;&#32780;&#22833;&#36133;&#65292;&#21017;&#35774;&#32622; <span class="t-lc"><a href="c-error-errno.html">errno</a></span> &#20026; <span class="t-lc"><a href="c-error-errno_macros.html">EOVERFLOW</a></span> &#12290;</p>
<p><a rel="nofollow" class="external text" href="https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/gmtime-s-gmtime32-s-gmtime64-s?view=vs-2019">Microsoft CRT</a> &#20013; <code>gmtime_s</code> &#30340;&#23454;&#29616;&#19982; C &#26631;&#20934;&#19981;&#20860;&#23481;&#65292;&#22240;&#20026;&#23427;&#26377;&#30456;&#21453;&#30340;&#21442;&#25968;&#39034;&#24207;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="c source-c">
<pre class="de1"><span class="co2">#define __STDC_WANT_LIB_EXT1__ 1</span>
<span class="co2">#include &lt;time.h&gt;</span>
<span class="co2">#include &lt;stdio.h&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="c-chrono-time_t.html"><span class="kw523">time_t</span></a> t <span class="sy1">=</span> <a href="c-chrono-time.html"><span class="kw513">time</span></a><span class="br0">(</span><a href="c-types-NULL.html"><span class="kw103">NULL</span></a><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;UTC: %s&quot;</span>, <a href="c-chrono-asctime.html"><span class="kw515">asctime</span></a><span class="br0">(</span>gmtime<span class="br0">(</span><span class="sy3">&amp;</span>t<span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;local: %s&quot;</span>, <a href="c-chrono-asctime.html"><span class="kw515">asctime</span></a><span class="br0">(</span><a href="c-chrono-localtime.html"><span class="kw519">localtime</span></a><span class="br0">(</span><span class="sy3">&amp;</span>t<span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co2">#ifdef __STDC_LIB_EXT1__</span>
<span class="kw1">struct</span> <a href="c-chrono-tm.html"><span class="kw522">tm</span></a> buf<span class="sy4">;</span>
<span class="kw4">char</span> str<span class="br0">[</span><span class="nu0">26</span><span class="br0">]</span><span class="sy4">;</span>
asctime_s<span class="br0">(</span>str,<span class="kw4">sizeof</span> str,gmtime_s<span class="br0">(</span><span class="sy3">&amp;</span>t, <span class="sy3">&amp;</span>buf<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;UTC: %s&quot;</span>, str<span class="br0">)</span><span class="sy4">;</span>
asctime_s<span class="br0">(</span>str,<span class="kw4">sizeof</span> str,localtime_s<span class="br0">(</span><span class="sy3">&amp;</span>t, <span class="sy3">&amp;</span>buf<span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;local: %s&quot;</span>, str<span class="br0">)</span><span class="sy4">;</span>
<span class="co2">#endif</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">UTC: Tue Feb 17 18:12:09 2015
local: Tue Feb 17 13:12:09 2015
UTC: Tue Feb 17 18:12:09 2015
local: Tue Feb 17 13:12:09 2015</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">&#24341;&#29992;</span></h3>
<div class="t-ref-std-17">
<ul>
<li>C17 &#26631;&#20934;&#65288;ISO/IEC 9899:2018&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>7.27.3.3 The gmtime function (p: 288)</li>
</ul>
</dd>
</dl>
<dl>
<dd>
<ul>
<li>K.3.8.2.3 The gmtime_s function (p: 454-455)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-11">
<ul>
<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>7.27.3.3 The gmtime function (p: 393-394)</li>
</ul>
</dd>
</dl>
<dl>
<dd>
<ul>
<li>K.3.8.2.3 The gmtime_s function (p: 626-627)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-c99">
<ul>
<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>7.23.3.3 The gmtime function (p: 343)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-c89">
<ul>
<li>C89/C90 &#26631;&#20934;&#65288;ISO/IEC 9899:1990&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>4.12.3.3 The gmtime function</li>
</ul>
</dd>
</dl>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="c-chrono-localtime.html"><span class="t-lines"><span>localtime</span><span>localtime_r</span><span>localtime_s</span></span></a></div>
<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c23">(C23)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
</div>
</td>
<td>&#23558;&#20174;&#32426;&#20803;&#24320;&#22987;&#30340;&#26102;&#38388;&#36716;&#25442;&#25104;&#20197;&#26412;&#22320;&#26102;&#38388;&#34920;&#31034;&#30340;&#26085;&#21382;&#26102;&#38388;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink