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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>wcsncpy</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_563"> </a>NAME</h4><blockquote>wcsncpy - copy part of a wide-character string</blockquote><h4><a name = "tag_000_010_564"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="wchar.h.html">wchar.h</a>>wchar_t *wcsncpy(wchar_t *<i>ws1</i>, const wchar_t *<i>ws2</i>, size_t <i>n</i>);</code></pre></blockquote><h4><a name = "tag_000_010_565"> </a>DESCRIPTION</h4><blockquote>The<i>wcsncpy()</i>function copies not more than<i>n</i>wide-character codes (wide-character codes that follow a nullwide-character code are not copied) from the array pointed to by<i>ws2</i>to the array pointed to by<i>ws1</i>.If copying takes place between objects that overlap, thebehaviour is undefined.<p>If the array pointed to by<i>ws2</i>is a wide-character string that is shorter than<i>n</i>wide-character codes, null wide-character codes are appended to thecopy in the arraypointed to by<i>ws1</i>,until<i>n</i>wide-character codes in all are written.</blockquote><h4><a name = "tag_000_010_566"> </a>RETURN VALUE</h4><blockquote>The<i>wcsncpy()</i>function returns<i>ws1</i>;no return value is reserved to indicate an error.</blockquote><h4><a name = "tag_000_010_567"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_010_568"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_569"> </a>APPLICATION USAGE</h4><blockquote>Wide-character code movement is performed differently in differentimplementations. Thus overlapping moves may yield surprises.<p>If there is no null wide-character code in the first<i>n</i>wide-character codes of the array pointed to by<i>ws2</i>,the result will not be null-terminated.</blockquote><h4><a name = "tag_000_010_570"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_571"> </a>SEE ALSO</h4><blockquote><i><a href="wcscpy.html">wcscpy()</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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