124 lines
3.9 KiB
HTML
124 lines
3.9 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>wcsspn</title>
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="wcsspn"></a> <a name="tag_03_840"></a><!-- wcsspn -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_840_01"></a>NAME</h4>
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<blockquote>wcsspn - get the length of a wide substring</blockquote>
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<h4><a name="tag_03_840_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/wchar.h.html">wchar.h</a>><br>
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<br>
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size_t wcsspn(const wchar_t *</tt><i>ws1</i><tt>, const wchar_t *</tt><i>ws2</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_840_03"></a>DESCRIPTION</h4>
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<blockquote>
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<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
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border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
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requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to
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the ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
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<p>The <i>wcsspn</i>() function shall compute the length (in wide characters) of the maximum initial segment of the wide-character
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string pointed to by <i>ws1</i> which consists entirely of wide-character codes from the wide-character string pointed to by
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<i>ws2</i>.</p>
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</blockquote>
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<h4><a name="tag_03_840_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>wcsspn</i>() function shall return the length of the initial substring of <i>ws1</i>; no return value is reserved to
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indicate an error.</p>
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</blockquote>
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<h4><a name="tag_03_840_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_840_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_840_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_840_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_840_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_840_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="wcscspn.html"><i>wcscspn</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/wchar.h.html"><i><wchar.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_840_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4. Derived from the MSE working draft.</p>
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</blockquote>
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<h4><a name="tag_03_840_12"></a>Issue 5</h4>
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<blockquote>
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<p>The RETURN VALUE section is updated to indicate that <i>wcsspn</i>() returns the length of <i>ws1</i> rather that <i>ws1</i>
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itself.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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