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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>memccpy</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_007_574"> </a>NAME</h4><blockquote>memccpy - copy bytes in memory</blockquote><h4><a name = "tag_000_007_575"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="string.h.html">string.h</a>>void *memccpy(void *<i>s1</i>, const void *<i>s2</i>, int <i>c</i>, size_t <i>n</i>);</code></pre></blockquote><h4><a name = "tag_000_007_576"> </a>DESCRIPTION</h4><blockquote>The<i>memccpy()</i>function copies bytes from memory area<i>s2</i>into<i>s1</i>,stopping after the first occurrence of byte<i>c</i>(converted to an <b>unsigned char</b>) is copied, or after<i>n</i>bytes are copied, whichever comes first.If copying takes place between objects that overlap, thebehaviour is undefined.</blockquote><h4><a name = "tag_000_007_577"> </a>RETURN VALUE</h4><blockquote>The<i>memccpy()</i>function returns a pointer to the byte after the copy of<i>c</i>in<i>s1</i>,or a null pointer if<i>c</i>was not found in the first<i>n</i>bytes of<i>s2</i>.</blockquote><h4><a name = "tag_000_007_578"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_007_579"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_007_580"> </a>APPLICATION USAGE</h4><blockquote>The<i>memccpy()</i>function does not check for the overflow of the receiving memory area.</blockquote><h4><a name = "tag_000_007_581"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_007_582"> </a>SEE ALSO</h4><blockquote><i><a href="string.h.html"><string.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from Issue 1 of the SVID.</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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