klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
196e706fe41f737f31d8617ead8fe566aa616329
hustoj/web/cppreference-zh/chmhelp/c-string-wide-wcsxfrm.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

191 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>wcsxfrm</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_string_wide_wcsxfrm skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading">wcsxfrm</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-string.html">string</a>&lrm; | <a href="c-string-wide.html">wide</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;wchar.h&gt;</code></div>
</td>
<td></td>
<td></td>
</tr>
</tbody>
<tbody class="t-dcl-rev">
<tr class="t-dcl t-since-c95 t-until-c99">
<td>
<div><span class="mw-geshi c source-c"><a href="c-types-size_t.html"><span class="kw100">size_t</span></a> wcsxfrm<span class="br0">(</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> dest, <span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> src, <a href="c-types-size_t.html"><span class="kw100">size_t</span></a> count <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-since-c95">(C95 &#36215;)</span><br />
<span class="t-mark-rev t-until-c99">(C99 &#21069;)</span></td>
</tr>
<tr class="t-dcl t-since-c99">
<td>
<div><span class="mw-geshi c source-c"><a href="c-types-size_t.html"><span class="kw100">size_t</span></a> wcsxfrm<span class="br0">(</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> <span class="kw4">restrict</span> dest, <span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> <span class="kw4">restrict</span> src, <a href="c-types-size_t.html"><span class="kw100">size_t</span></a> count <span class="br0">)</span><span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
</tr>
</tbody>
<tbody>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#21464;&#25442; <code>src</code> &#25152;&#25351;&#21521;&#30340;&#31354;&#32456;&#27490;&#23485;&#23383;&#31526;&#20018;&#20026;&#23454;&#29616;&#23450;&#20041;&#24418;&#24335;&#65292;&#28385;&#36275;&#22312;&#24403;&#21069; C &#26412;&#22320;&#29615;&#22659;&#20013;&#65292;&#29992; <span class="t-lc"><a href="c-string-wide-wcscmp.html">wcscmp</a></span> &#27604;&#36739;&#20108;&#20010;&#21464;&#25442;&#21518;&#30340;&#23383;&#31526;&#20018;&#32473;&#20986;&#30340;&#32467;&#26524;&#19982;&#29992; <span class="t-lc"><a href="c-string-wide-wcscoll.html">wcscoll</a></span> &#27604;&#36739;&#28304;&#23383;&#31526;&#20018;&#32773;&#30456;&#21516;&#12290;</p>
<p>&#23558;&#21464;&#25442;&#21518;&#23383;&#31526;&#20018;&#30340;&#39318; <code>count</code> &#20010;&#23383;&#31526;&#20889;&#20837;&#30446;&#26631;&#65292;&#21253;&#21547;&#31354;&#32456;&#27490;&#31526;&#65292;&#24182;&#36820;&#22238;&#23436;&#25972;&#30340;&#21464;&#25442;&#21518;&#23383;&#31526;&#20018;&#38271;&#24230;&#65292;&#25490;&#38500;&#31354;&#32456;&#27490;&#31526;&#12290;</p>
<p>&#33509; <code>count</code> &#20026; <span class="t-c"><span class="mw-geshi c source-c">&#8203;<span class="nu0">0</span>&#8203;</span></span> &#65292;&#21017;&#20801;&#35768; <code>dest</code> &#20026;&#31354;&#25351;&#38024;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#33021;&#25509;&#25910;&#25972;&#20010;&#21464;&#25442;&#21518;&#23383;&#31526;&#20018;&#30340;&#27491;&#30830;&#32531;&#20914;&#21306;&#38271;&#24230;&#26159; <span class="t-c"><span class="mw-geshi c source-c"><span class="nu0">1</span><span class="sy2">+</span>wcsxfrm<span class="br0">(</span><a href="c-types-NULL.html"><span class="kw103">NULL</span></a>, src, <span class="nu0">0</span><span class="br0">)</span></span></span> &#12290;</p>
<p>&#22312;&#20197;&#21516;&#19968;&#23485;&#23383;&#31526;&#20018;&#25110;&#23485;&#23383;&#31526;&#20018;&#38598;&#36827;&#34892;&#26412;&#22320;&#29615;&#22659;&#20381;&#36182;&#27604;&#36739;&#26102;&#20351;&#29992;&#27492;&#20989;&#25968;&#65292;&#22240;&#20026;&#21482;&#29992; <code>wcsxfrm</code> &#21464;&#25442;&#25152;&#26377;&#23383;&#31526;&#20018;&#19968;&#27425;&#65292;&#20877;&#20197; <span class="t-lc"><a href="c-string-wide-wcscmp.html">wcscmp</a></span> &#36827;&#34892;&#21518;&#32493;&#27604;&#36739;&#26356;&#20026;&#39640;&#25928;&#12290;</p>
<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>dest</td>
<td>-</td>
<td>&#25351;&#21521;&#35201;&#20889;&#20837;&#21464;&#25442;&#21518;&#23383;&#31526;&#20018;&#21040;&#30340;&#31354;&#32456;&#27490;&#23485;&#23383;&#31526;&#25968;&#32452;&#39318;&#20803;&#32032;&#30340;&#25351;&#38024;</td>
</tr>
<tr class="t-par">
<td>src</td>
<td>-</td>
<td>&#25351;&#21521;&#35201;&#21464;&#25442;&#30340;&#31354;&#32456;&#27490;&#23485;&#23383;&#31526;&#20018;&#30340;&#25351;&#38024;</td>
</tr>
<tr class="t-par">
<td>count</td>
<td>-</td>
<td>&#35201;&#36755;&#20986;&#30340;&#26368;&#22823;&#23383;&#31526;&#25968;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#21464;&#25442;&#21518;&#30340;&#31354;&#32456;&#27490;&#23485;&#23383;&#31526;&#20018;&#30340;&#38271;&#24230;&#65292;&#19981;&#21253;&#21547;&#31354;&#32456;&#27490;&#23383;&#31526;&#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">#include &lt;stdio.h&gt;</span>
<span class="co2">#include &lt;wchar.h&gt;</span>
<span class="co2">#include &lt;locale.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-locale-setlocale.html"><span class="kw900">setlocale</span></a><span class="br0">(</span><a href="c-locale-LC_categories.html"><span class="kw903">LC_ALL</span></a>, <span class="st0">&quot;sv_SE.utf8&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">const</span> <span class="kw4">wchar_t</span> <span class="sy2">*</span>in1 <span class="sy1">=</span> L<span class="st0">&quot;<span class="es3">\u00e5</span>r&quot;</span><span class="sy4">;</span>
<span class="kw4">wchar_t</span> out1<span class="br0">[</span><span class="nu0">1</span><span class="sy2">+</span>wcsxfrm<span class="br0">(</span><a href="c-types-NULL.html"><span class="kw103">NULL</span></a>, in1, <span class="nu0">0</span><span class="br0">)</span><span class="br0">]</span><span class="sy4">;</span>
wcsxfrm<span class="br0">(</span>out1, in1, <span class="kw4">sizeof</span> out1<span class="sy2">/</span><span class="kw4">sizeof</span> <span class="sy2">*</span>out1<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">const</span> <span class="kw4">wchar_t</span> <span class="sy2">*</span>in2 <span class="sy1">=</span> L<span class="st0">&quot;<span class="es3">\u00e4</span>ngel&quot;</span><span class="sy4">;</span>
<span class="kw4">wchar_t</span> out2<span class="br0">[</span><span class="nu0">1</span><span class="sy2">+</span>wcsxfrm<span class="br0">(</span><a href="c-types-NULL.html"><span class="kw103">NULL</span></a>, in2, <span class="nu0">0</span><span class="br0">)</span><span class="br0">]</span><span class="sy4">;</span>
wcsxfrm<span class="br0">(</span>out2, in2, <span class="kw4">sizeof</span> out2<span class="sy2">/</span><span class="kw4">sizeof</span> <span class="sy2">*</span>out2<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;In the Swedish locale: &quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span><span class="br0">(</span><a href="c-string-wide-wcscmp.html"><span class="kw625">wcscmp</span></a><span class="br0">(</span>out1, out2<span class="br0">)</span> <span class="sy1">&lt;</span> <span class="nu0">0</span><span class="br0">)</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;%ls before %ls<span class="es1">\n</span>&quot;</span>, in1, in2<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">else</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;%ls before %ls<span class="es1">\n</span>&quot;</span>, in2, in1<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;In lexicographical comparison: &quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span><span class="br0">(</span><a href="c-string-wide-wcscmp.html"><span class="kw625">wcscmp</span></a><span class="br0">(</span>in1, in2<span class="br0">)</span> <span class="sy1">&lt;</span> <span class="nu0">0</span><span class="br0">)</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;%ls before %ls<span class="es1">\n</span>&quot;</span>, in1, in2<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">else</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;%ls before %ls<span class="es1">\n</span>&quot;</span>, in2, in1<span class="br0">)</span><span class="sy4">;</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">In the Swedish locale: &aring;r before &auml;ngel
In lexicographical comparison: &auml;ngel before &aring;r</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-11">
<ul>
<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>7.29.4.4.4 The wcsxfrm function (p: 434-435)</li>
</ul>
</dd>
</dl>
<div class="t-ref-std-c99">
<ul>
<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>7.24.4.4.4 The wcsxfrm function (p: 380-381)</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-string-byte-strcoll.html"><span class="t-lines"><span>strcoll</span></span></a></div>
</div>
</td>
<td>&#27604;&#36739;&#20004;&#20010;&#23383;&#31526;&#20018;&#65292;&#26681;&#25454;&#24403;&#21069;&#26412;&#22320;&#29615;&#22659;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="c-string-wide-wcscoll.html"><span class="t-lines"><span>wcscoll</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div>
</div>
</td>
<td>&#26681;&#25454;&#24403;&#21069;&#26412;&#22320;&#29615;&#22659;&#27604;&#36739;&#20004;&#20010;&#23485;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="c-string-wide-wcscmp.html"><span class="t-lines"><span>wcscmp</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div>
</div>
</td>
<td>&#27604;&#36739;&#20004;&#20010;&#23485;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="c-string-byte-strxfrm.html"><span class="t-lines"><span>strxfrm</span></span></a></div>
</div>
</td>
<td>&#21464;&#25442;&#23383;&#31526;&#20018;&#65292;&#20351;&#24471; strcmp &#20250;&#20135;&#29983;&#21516; strcoll &#30340;&#32467;&#26524;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
</table>
</div>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink