1<html lang="en"> 2<head> 3<title>memccpy - Untitled</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Untitled"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Strings.html#Strings" title="Strings"> 9<link rel="prev" href="index.html#index" title="index"> 10<link rel="next" href="memchr.html#memchr" title="memchr"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<meta http-equiv="Content-Style-Type" content="text/css"> 13<style type="text/css"><!-- 14 pre.display { font-family:inherit } 15 pre.format { font-family:inherit } 16 pre.smalldisplay { font-family:inherit; font-size:smaller } 17 pre.smallformat { font-family:inherit; font-size:smaller } 18 pre.smallexample { font-size:smaller } 19 pre.smalllisp { font-size:smaller } 20 span.sc { font-variant:small-caps } 21 span.roman { font-family:serif; font-weight:normal; } 22 span.sansserif { font-family:sans-serif; font-weight:normal; } 23--></style> 24<link rel="stylesheet" type="text/css" href="../cs.css"> 25</head> 26<body> 27<div class="node"> 28<a name="memccpy"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="memchr.html#memchr">memchr</a>, 31Previous: <a rel="previous" accesskey="p" href="index.html#index">index</a>, 32Up: <a rel="up" accesskey="u" href="Strings.html#Strings">Strings</a> 33<hr> 34</div> 35 36<h3 class="section">5.5 <code>memccpy</code>—copy memory regions with end-token check</h3> 37 38<p><strong>Synopsis</strong> 39<pre class="example"> #include <string.h> 40 void* memccpy(void *<var>out</var>, const void *<var>in</var>, 41 int <var>endchar</var>, size_t <var>n</var>); 42 43</pre> 44 <p><strong>Description</strong><br> 45This function copies up to <var>n</var> bytes from the memory region 46pointed to by <var>in</var> to the memory region pointed to by 47<var>out</var>. If a byte matching the <var>endchar</var> is encountered, 48the byte is copied and copying stops. 49 50 <p>If the regions overlap, the behavior is undefined. 51 52 <p><br> 53<strong>Returns</strong><br> 54<code>memccpy</code> returns a pointer to the first byte following the 55<var>endchar</var> in the <var>out</var> region. If no byte matching 56<var>endchar</var> was copied, then <code>NULL</code> is returned. 57 58 <p><br> 59<strong>Portability</strong><br> 60<code>memccpy</code> is a GNU extension. 61 62 <p><code>memccpy</code> requires no supporting OS subroutines. 63 64 <p><br> 65 66 </body></html> 67 68