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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>wcscoll</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_010_500"> </a>NAME</h4><blockquote>wcscoll - wide-character string comparison using collating information</blockquote><h4><a name = "tag_000_010_501"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="wchar.h.html">wchar.h</a>>int wcscoll(const wchar_t *<i>ws1</i>, const wchar_t *<i>ws2</i>);</code></pre></blockquote><h4><a name = "tag_000_010_502"> </a>DESCRIPTION</h4><blockquote>The<i>wcscoll()</i>function compares the wide-character string pointed to by<i>ws1</i>to the wide-character string pointed to by<i>ws2</i>,both interpreted as appropriate to the<a href="../xbd/locale.html#tag_005_003_002">LC_COLLATE</a>category of the current locale.<p>The<i>wcscoll()</i>function will not change the setting of <b>errno</b>if successful.<p>An application wishing to check for error situations should set<i>errno</i>to 0 before calling<i>wcscoll()</i>.If<i>errno</i>is non-zero on return, an error has occurred.</blockquote><h4><a name = "tag_000_010_503"> </a>RETURN VALUE</h4><blockquote>Upon successful completion,<i>wcscoll()</i>returns an integer greater than, equal to or less than0, according to whether the wide-character string pointed to by<i>ws1</i>is greater than, equal to or less than the wide-character string pointed to by<i>ws2</i>,when both are interpreted as appropriate to the current locale.On error,<i>wcscoll()</i>may set<i>errno</i>,but no return value is reserved to indicate an error.</blockquote><h4><a name = "tag_000_010_504"> </a>ERRORS</h4><blockquote>The<i>wcscoll()</i>function may fail if:<dl compact><dt>[EINVAL]<dd>The <i>ws1</i> or <i>ws2</i> arguments contain wide-charactercodes outside the domain of the collating sequence.</dl></blockquote><h4><a name = "tag_000_010_505"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_506"> </a>APPLICATION USAGE</h4><blockquote>The<i><a href="wcsxfrm.html">wcsxfrm()</a></i>and<i><a href="wcscmp.html">wcscmp()</a></i>functions should be used for sorting large lists.</blockquote><h4><a name = "tag_000_010_507"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_508"> </a>SEE ALSO</h4><blockquote><i><a href="wcscmp.html">wcscmp()</a></i>,<i><a href="wcsxfrm.html">wcsxfrm()</a></i>,<i><a href="wchar.h.html"><wchar.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from the MSE working draft.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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