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Next: <a href="wcsncmp.html#wcsncmp" accesskey="n" rel="next">wcsncmp</a>, Previous: <a href="wcslen.html#wcslen" accesskey="p" rel="prev">wcslen</a>, Up: <a href="Wchar-strings.html#Wchar-strings" accesskey="u" rel="up">Wchar strings</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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<a name="wcsncat_002d_002d_002dconcatenate-part-of-two-wide_002dcharacter-strings"></a>
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<h3 class="section">6.18 <code>wcsncat</code>—concatenate part of two wide-character strings</h3>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <wchar.h>
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wchar_t *wcsncat(wchar_t *__restrict <var>s1</var>,
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const wchar_t *__restrict <var>s2</var>, size_t <var>n</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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The <code>wcsncat</code> function appends not more than <var>n</var> wide-character
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codes (a null wide-character code and wide-character codes that follow
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it are not appended) from the array pointed to by <var>s2</var> to the end of
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the wide-character string pointed to by <var>s1</var>. The initial
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wide-character code of <var>s2</var> overwrites the null wide-character code
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at the end of <var>s1</var>.
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A terminating null wide-character code is always appended to the result.
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If copying takes place between objects that overlap, the behaviour is
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undefined.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The <code>wcsncat</code> function returns <var>s1</var>; no return value is reserved to
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indicate an error.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>wcsncat</code> is ISO/IEC 9899/AMD1:1995 (ISO C).
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</p>
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<p>No supporting OS subroutines are required.
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</p>
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