1<html lang="en"> 2<head> 3<title>wcsncpy - 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="Wchar-strings.html#Wchar-strings" title="Wchar strings"> 9<link rel="prev" href="wcsncmp.html#wcsncmp" title="wcsncmp"> 10<link rel="next" href="wcpncpy.html#wcpncpy" title="wcpncpy"> 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="wcsncpy"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="wcpncpy.html#wcpncpy">wcpncpy</a>, 31Previous: <a rel="previous" accesskey="p" href="wcsncmp.html#wcsncmp">wcsncmp</a>, 32Up: <a rel="up" accesskey="u" href="Wchar-strings.html#Wchar-strings">Wchar strings</a> 33<hr> 34</div> 35 36<h3 class="section">6.19 <code>wcsncpy</code>—copy part of a wide-character string</h3> 37 38<p><strong>Synopsis</strong> 39<pre class="example"> #include <wchar.h> 40 wchar_t *wcsncpy(wchar_t *<var>s1</var>, const wchar_t *<var>s2</var>, size_t <var>n</var>); 41 42</pre> 43 <p><strong>Description</strong><br> 44The <code>wcsncpy</code> function copies not more than <var>n</var> wide-character codes 45(wide-character codes that follow a null wide-character code are not 46copied) from the array pointed to by <var>s2</var> to the array pointed to 47by <var>s1</var>. If copying takes place between objects that overlap, the 48behaviour is undefined. Note that if <var>s1</var> contains more than <var>n</var> 49wide characters before its terminating null, the result is not 50null-terminated. 51 52 <p>If the array pointed to by <var>s2</var> is a wide-character string that is 53shorter than <var>n</var> wide-character codes, null wide-character codes are 54appended to the copy in the array pointed to by <var>s1</var>, until <var>n</var> 55wide-character codes in all are written. 56 57 <p><br> 58<strong>Returns</strong><br> 59The <code>wcsncpy</code> function returns <var>s1</var>; no return value is reserved to 60indicate an error. 61 62 <p><br> 63<strong>Portability</strong><br> 64ISO/IEC 9899; POSIX.1. 65 66 <p>No supporting OS subroutines are required. 67 68 <p><br> 69 70 </body></html> 71 72