<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ --> <head> <title>wcsspn (The Red Hat newlib C Library)</title> <meta name="description" content="wcsspn (The Red Hat newlib C Library)"> <meta name="keywords" content="wcsspn (The Red Hat newlib C Library)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link href="index.html#Top" rel="start" title="Top"> <link href="Document-Index.html#Document-Index" rel="index" title="Document Index"> <link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents"> <link href="Wchar-strings.html#Wchar-strings" rel="up" title="Wchar strings"> <link href="wcsstr.html#wcsstr" rel="next" title="wcsstr"> <link href="wcsrchr.html#wcsrchr" rel="prev" title="wcsrchr"> <style type="text/css"> <!-- a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} blockquote.smallquotation {font-size: smaller} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} div.lisp {margin-left: 3.2em} div.smalldisplay {margin-left: 3.2em} div.smallexample {margin-left: 3.2em} div.smalllisp {margin-left: 3.2em} kbd {font-style: oblique} pre.display {font-family: inherit} pre.format {font-family: inherit} pre.menu-comment {font-family: serif} pre.menu-preformatted {font-family: serif} pre.smalldisplay {font-family: inherit; font-size: smaller} pre.smallexample {font-size: smaller} pre.smallformat {font-family: inherit; font-size: smaller} pre.smalllisp {font-size: smaller} span.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <a name="wcsspn"></a> <div class="header"> <p> Next: <a href="wcsstr.html#wcsstr" accesskey="n" rel="next">wcsstr</a>, Previous: <a href="wcsrchr.html#wcsrchr" accesskey="p" rel="prev">wcsrchr</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> </div> <hr> <a name="wcsspn_002d_002d_002dget-length-of-a-wide-substring"></a> <h3 class="section">6.25 <code>wcsspn</code>—get length of a wide substring</h3> <p><strong>Synopsis</strong> </p><div class="example"> <pre class="example">#include <wchar.h> size_t wcsspn(const wchar_t *<var>s</var>, const wchar_t *<var>set</var>); </pre></div> <p><strong>Description</strong><br> The <code>wcsspn</code> function computes the length of the maximum initial segment of the wide-character string pointed to by <var>s</var> which consists entirely of wide-character codes from the wide-character string pointed to by <var>set</var>. </p> <br> <p><strong>Returns</strong><br> The wcsspn() function returns the length <var>s1</var>; no return value is reserved to indicate an error. </p> <br> <p><strong>Portability</strong><br> <code>wcsspn</code> is ISO/IEC 9899/AMD1:1995 (ISO C). </p> <p>No supporting OS subroutines are required. </p> <br> </body> </html>