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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswdigit.html" title="c/string/wide/iswdigit"><span class="t-lines"><span>iswdigit</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswxdigit.html" title="c/string/wide/iswxdigit"><span class="t-lines"><span>iswxdigit</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswblank.html" title="c/string/wide/iswblank"><span class="t-lines"><span>iswblank</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wctype.html" title="c/string/wide/wctype"><span class="t-lines"><span>wctype</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswctype.html" title="c/string/wide/iswctype"><span class="t-lines"><span>iswctype</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswcntrl.html" title="c/string/wide/iswcntrl"><span class="t-lines"><span>iswcntrl</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswgraph.html" title="c/string/wide/iswgraph"><span class="t-lines"><span>iswgraph</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswspace.html" title="c/string/wide/iswspace"><span class="t-lines"><span>iswspace</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswprint.html" title="c/string/wide/iswprint"><span class="t-lines"><span>iswprint</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iswpunct.html" title="c/string/wide/iswpunct"><span class="t-lines"><span>iswpunct</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="towlower.html" title="c/string/wide/towlower"><span class="t-lines"><span>towlower</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="towupper.html" title="c/string/wide/towupper"><span class="t-lines"><span>towupper</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wctrans.html" title="c/string/wide/wctrans"><span class="t-lines"><span>wctrans</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="towctrans.html" title="c/string/wide/towctrans"><span class="t-lines"><span>towctrans</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Conversions to numeric formats</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcstol.html" title="c/string/wide/wcstol"><span class="t-lines"><span>wcstol</span><span>wcstoll</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcstoul.html" title="c/string/wide/wcstoul"><span class="t-lines"><span>wcstoul</span><span>wcstoull</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcstof.html" title="c/string/wide/wcstof"><span class="t-lines"><span>wcstof</span><span>wcstod</span><span>wcstold</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcstoimax.html" title="c/string/wide/wcstoimax"><span class="t-lines"><span>wcstoimax</span><span>wcstoumax</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> String manipulation</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcslen.html" title="c/string/wide/wcslen"><span class="t-lines"><span>wcslen</span><span>wcsnlen_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcscpy.html" title="c/string/wide/wcscpy"><span class="t-lines"><span>wcscpy</span><span>wcscpy_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsncpy.html" title="c/string/wide/wcsncpy"><span class="t-lines"><span>wcsncpy</span><span>wcsncpy_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcscat.html" title="c/string/wide/wcscat"><span class="t-lines"><span>wcscat</span><span>wcscat_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsncat.html" title="c/string/wide/wcsncat"><span class="t-lines"><span>wcsncat</span><span>wcsncat_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsstr.html" title="c/string/wide/wcsstr"><span class="t-lines"><span>wcsstr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcscmp.html" title="c/string/wide/wcscmp"><span class="t-lines"><span>wcscmp</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsncmp.html" title="c/string/wide/wcsncmp"><span class="t-lines"><span>wcsncmp</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcscoll.html" title="c/string/wide/wcscoll"><span class="t-lines"><span>wcscoll</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsxfrm.html" title="c/string/wide/wcsxfrm"><span class="t-lines"><span>wcsxfrm</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcschr.html" title="c/string/wide/wcschr"><span class="t-lines"><span>wcschr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsrchr.html" title="c/string/wide/wcsrchr"><span class="t-lines"><span>wcsrchr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcspbrk.html" title="c/string/wide/wcspbrk"><span class="t-lines"><span>wcspbrk</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcsspn.html" title="c/string/wide/wcsspn"><span class="t-lines"><span>wcsspn</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wcscspn.html" title="c/string/wide/wcscspn"><span class="t-lines"><span>wcscspn</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>wcstok</span><span>wcstok_s</span></span></strong></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Array manipulation</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wmemcpy.html" title="c/string/wide/wmemcpy"><span class="t-lines"><span>wmemcpy</span><span>wmemcpy_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wmemmove.html" title="c/string/wide/wmemmove"><span class="t-lines"><span>wmemmove</span><span>wmemmove_s</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wmemcmp.html" title="c/string/wide/wmemcmp"><span class="t-lines"><span>wmemcmp</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wmemchr.html" title="c/string/wide/wmemchr"><span class="t-lines"><span>wmemchr</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="wmemset.html" title="c/string/wide/wmemset"><span class="t-lines"><span>wmemset</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
</table></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/string/wide/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>Defined in header <code><wchar.h></code>
</div></td>
<td></td>
<td></td>
</tr>
</tbody>
<tbody class="t-dcl-rev t-dcl-rev-num"><tr class="t-dcl-rev-aux">
<td></td>
<td rowspan="142">(1)</td>
<td></td>
</tr>
<tr class="t-dcl t-since-c95 t-until-c99">
<td> <div><span class="mw-geshi c source-c"><span class="kw4">wchar_t</span><span class="sy2">*</span> wcstok<span class="br0">(</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> str, <span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span> delim, <span class="kw4">wchar_t</span> <span class="sy2">**</span>ptr <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td> <span class="t-mark-rev t-since-c95">(since C95)</span> <br /><span class="t-mark">(until C99)</span> </td>
</tr>
<tr class="t-dcl t-since-c99">
<td> <div><span class="mw-geshi c source-c"><span class="kw4">wchar_t</span> <span class="sy2">*</span>wcstok<span class="br0">(</span><span class="kw4">wchar_t</span> <span class="sy2">*</span> <span class="kw4">restrict</span> str, <span class="kw4">const</span> <span class="kw4">wchar_t</span> <span class="sy2">*</span> <span class="kw4">restrict</span> delim,<br />
                <span class="kw4">wchar_t</span> <span class="sy2">**</span><span class="kw4">restrict</span> ptr<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td class="t-dcl-nopad"> </td>
<td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td>
</tr>
</tbody><tbody>
<tr class="t-dcl t-since-c11">
<td> <div><span class="mw-geshi c source-c"><span class="kw4">wchar_t</span> <span class="sy2">*</span>wcstok_s<span class="br0">(</span> <span class="kw4">wchar_t</span> <span class="sy2">*</span><span class="kw4">restrict</span> str, rsize_t <span class="sy2">*</span><span class="kw4">restrict</span> strmax,<br />
                   <span class="kw4">const</span> <span class="kw4">wchar_t</span> <span class="sy2">*</span><span class="kw4">restrict</span> delim, <span class="kw4">wchar_t</span> <span class="sy2">**</span><span class="kw4">restrict</span> ptr<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td> <span class="t-mark-rev t-since-c11">(since C11)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<div class="t-li1"><span class="t-li">1)</span> Finds the next token in a null-terminated wide string pointed to by <code>str</code>. The separator characters are identified by null-terminated wide string pointed to by <code>delim</code>.</div>
<div class="t-li1"><span class="t-li"></span> This function is designed to be called multiples times to obtain successive tokens from the same string.</div>
<dl><dd><ul><li> If <span class="t-c"><span class="mw-geshi c source-c">str <span class="sy3">!</span><span class="sy1">=</span> <a href="../../types/NULL.html"><span class="kw103">NULL</span></a></span></span>, the call is treated as the first call to <code>wcstok</code> for this particular wide string. The function searches for the first wide character which is <i>not</i> contained in <code>delim</code>.
</li></ul>
<dl><dd><ul><li> If no such wide character was found, there are no tokens in <code>str</code> at all, and the function returns a null pointer.
</li><li> If such wide character was found, it is the <i>beginning of the token</i>. The function then searches from that point on for the first wide character that <i>is</i> contained in <code>delim</code>.
</li></ul>
<dl><dd><ul><li> If no such wide character was found, <code>str</code> has only one token, and future calls to <code>wcstok</code> will return a null pointer
</li><li> If such wide character was found, it is <i>replaced</i> by the null wide character <span class="t-c"><span class="mw-geshi c source-c">L<span class="st0">'<span class="es5">\0</span>'</span></span></span> and the parser state (typically a pointer to the following wide character) is stored in the user-provided location <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>ptr</span></span>.
</li></ul>
</dd></dl>
<ul><li> The function then returns the pointer to the beginning of the token
</li></ul>
</dd></dl>
<ul><li> If <span class="t-c"><span class="mw-geshi c source-c">str <span class="sy1">==</span> <a href="../../types/NULL.html"><span class="kw103">NULL</span></a></span></span>, the call is treated as a subsequent call to <code>wcstok</code>: the function continues from where it left in the previous invocation with the same <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>ptr</span></span>. The behavior is the same as if the pointer to the wide character that follows the last detected token is passed as <span class="t-c"><span class="mw-geshi c source-c">str</span></span>.
</li></ul>
</dd></dl>
<div class="t-li1"><span class="t-li">2)</span> Same as <span class="t-v">(1)</span>, except that on every step, writes the number of characters left to see in <code>str</code> into <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>strmax</span></span>. Repeat calls (with null <code>str</code>) must pass both <code>strmax</code> and <code>ptr</code> with the values stored by the previous call. Also, the following errors are detected at runtime and call the currently installed <a href="../../error/set_constraint_handler_s.html" title="c/error/set constraint handler s">constraint handler</a> function, without storing anything in the object pointed to by <code>ptr</code>
<dl><dd><ul><li> <code>strmax</code>, <code>delim</code>, or <code>ptr</code> is a null pointer
</li><li> on a non-initial call (with null <code>str</code>), <code>*ptr</code> is a null pointer
</li><li> on the first call, <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>strmax</span></span> is zero or greater than <span class="t-c"><span class="mw-geshi c source-c">RSIZE_MAX<span class="sy2">/</span><span class="kw4">sizeof</span><span class="br0">(</span><span class="kw4">wchar_t</span><span class="br0">)</span></span></span>
</li><li> search for the end of a token reaches the end of the source string (as measured by the initial value of <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">*</span>strmax</span></span>)) without encountering the null terminator
</li></ul>
</dd><dd>As all bounds-checked functions, <code>wcstok_s</code> is only guaranteed to be available if <span class="t-c"><span class="mw-geshi c source-c">__STDC_LIB_EXT1__</span></span> is defined by the implementation and if the user defines <span class="t-c"><span class="mw-geshi c source-c">__STDC_WANT_LIB_EXT1__</span></span> to the integer constant <span class="t-c"><span class="mw-geshi c source-c"><span class="nu0">1</span></span></span> before including <code>wchar.h</code>.</div>
</dd></dl>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="wcstok.html#Parameters"><span class="tocnumber">1</span> <span class="toctext">Parameters</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="wcstok.html#Return_value"><span class="tocnumber">2</span> <span class="toctext">Return value</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="wcstok.html#Note"><span class="tocnumber">3</span> <span class="toctext">Note</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="wcstok.html#Example"><span class="tocnumber">4</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1 tocsection-5"><a href="wcstok.html#References"><span class="tocnumber">5</span> <span class="toctext">References</span></a></li>
<li class="toclevel-1 tocsection-6"><a href="wcstok.html#See_also"><span class="tocnumber">6</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=1" title="Edit section: Parameters">edit</a>]</span> <span class="mw-headline" id="Parameters">Parameters</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td> str
</td>
<td> -
</td>
<td> pointer to the null-terminated wide string to tokenize
</td></tr>
<tr class="t-par">
<td> delim
</td>
<td> -
</td>
<td> pointer to the null-terminated wide string identifying delimiters
</td></tr>
<tr class="t-par">
<td> ptr
</td>
<td> -
</td>
<td> pointer to an object of type <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">wchar_t</span><span class="sy2">*</span></span></span>, which is used by both <code>wcstok</code> and <code>wcstok_s</code> to store the internal state of the parser
</td></tr>
<tr class="t-par">
<td> strmax
</td>
<td> -
</td>
<td> pointer to an object which initially holds the size of <code>str</code>: wcstok_s stores the number of characters that remain to be examined
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=2" title="Edit section: Return value">edit</a>]</span> <span class="mw-headline" id="Return_value">Return value</span></h3>
<p>Returns pointer to the beginning of the next token or null pointer if there are no more tokens.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=3" title="Edit section: Note">edit</a>]</span> <span class="mw-headline" id="Note">Note</span></h3>
<p>This function is destructive: it writes the <span class="t-c"><span class="mw-geshi c source-c">L<span class="st0">'<span class="es5">\0</span>'</span></span></span> characters in the elements of the string <code>str</code>. In particular, a wide string literal cannot be used as the first argument of <code>wcstok</code>.
</p><p>Unlike <span class="t-lc"><a href="../byte/strtok.html" title="c/string/byte/strtok">strtok</a></span>, <code>wcstok</code> does not update static storage: it stores the parser state in the user-provided location.
</p><p>Unlike most other tokenizers, the delimiters in <code>wcstok</code> can be different for each subsequent token, and can even depend on the contents of the previous tokens.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=4" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="c source-c"><pre class="de1"><span class="co2">#include <wchar.h></span>
<span class="co2">#include <stdio.h></span>
 
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">wchar_t</span> input<span class="br0">[</span><span class="br0">]</span> <span class="sy1">=</span> L<span class="st0">"A bird came down the walk"</span><span class="sy4">;</span>
<a href="../../io/fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"Parsing the input string '%ls'<span class="es1">\n</span>"</span>, input<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">wchar_t</span> <span class="sy2">*</span>buffer<span class="sy4">;</span>
<span class="kw4">wchar_t</span> <span class="sy2">*</span>token <span class="sy1">=</span> wcstok<span class="br0">(</span>input, L<span class="st0">" "</span>, <span class="sy3">&</span>buffer<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">while</span><span class="br0">(</span>token<span class="br0">)</span> <span class="br0">{</span>
<a href="../../io/fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"%ls<span class="es1">\n</span>"</span>, token<span class="br0">)</span><span class="sy4">;</span>
token <span class="sy1">=</span> wcstok<span class="br0">(</span><a href="../../types/NULL.html"><span class="kw103">NULL</span></a>, L<span class="st0">" "</span>, <span class="sy3">&</span>buffer<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
 
<a href="../../io/fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"Contents of the input string now: '"</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">for</span><span class="br0">(</span><a href="../../types/size_t.html"><span class="kw100">size_t</span></a> n <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> n <span class="sy1"><</span> <span class="kw4">sizeof</span> input <span class="sy2">/</span> <span class="kw4">sizeof</span> <span class="sy2">*</span>input<span class="sy4">;</span> <span class="sy2">++</span>n<span class="br0">)</span>
input<span class="br0">[</span>n<span class="br0">]</span> <span class="sy4">?</span> <a href="../../io/fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"%lc"</span>, input<span class="br0">[</span>n<span class="br0">]</span><span class="br0">)</span> <span class="sy4">:</span> <a href="../../io/fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"<span class="es1">\\</span>0"</span><span class="br0">)</span><span class="sy4">;</span>
<a href="../../io/puts.html"><span class="kw835">puts</span></a><span class="br0">(</span><span class="st0">"'"</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<p>Output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">Parsing the input string 'A bird came down the walk'
A
bird
came
down
the
walk
Contents of the input string now: 'A\0bird\0came\0down\0the\0walk\0'</pre></div></div>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=5" title="Edit section: References">edit</a>]</span> <span class="mw-headline" id="References">References</span></h3>
<div class="t-ref-std-11">
<ul><li> C11 standard (ISO/IEC 9899:2011):
</li></ul>
<dl><dd><ul><li> 7.29.4.5.7 The wcstok function (p: 437-438)
</li></ul>
</dd></dl>
<dl><dd><ul><li> K.3.9.2.3.1 The wcstok_s function (p: 645-646)
</li></ul>
</dd></dl>
<div class="t-ref-std-c99">
<ul><li> C99 standard (ISO/IEC 9899:1999):
</li></ul>
<dl><dd><ul><li> 7.24.4.5.7 The wcstok function (p: 383-384)
</li></ul>
</dd></dl>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcstok&action=edit&section=6" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../byte/strtok.html" title="c/string/byte/strtok"> <span class="t-lines"><span>strtok</span><span>strtok_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td> finds the next token in a byte string <br /> <span class="t-mark">(function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:c/string/byte/dsc_strtok&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td colspan="2"> <div class="t-dsc-see"><span><a href="../../../cpp/string/wide/wcstok.html" title="cpp/string/wide/wcstok">C++ documentation</a></span> for <span class="t-dsc-see-tt"><span>wcstok</span></span></div>
</td></tr>
</table></div>
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