.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
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.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   Dinkumware C library reference http://www.dinkumware.com/
.\"   OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
.\"   ISO/IEC 9899:1999
.\"
.TH WCSSPN 3  1999-07-25 "GNU" "Linux Programmer's Manual"
.SH NAME
wcsspn \- advance in a wide-character string, skipping
any of a set of wide characters
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.sp
.BI "size_t wcsspn(const wchar_t *" wcs ", const wchar_t *" accept );
.fi
.SH DESCRIPTION
The
.BR wcsspn ()
function is the wide-character equivalent of the
.BR strspn (3)
function.
It determines the length of the longest initial segment of \fIwcs\fP
which consists entirely of wide-characters listed in \fIaccept\fP.
In other
words, it searches for the first occurrence in the wide-character string
\fIwcs\fP of a wide-character not contained in the wide-character string
\fIaccept\fP.
.SH "RETURN VALUE"
The
.BR wcsspn ()
function returns the number of
wide characters in the longest
initial segment of \fIwcs\fP which consists entirely of wide-characters listed
in \fIaccept\fP.
In other words, it returns the position of the first
occurrence in the wide-character string \fIwcs\fP of a wide-character not
contained in the wide-character string \fIaccept\fP, or \fIwcslen(wcs)\fP
if there is none.
.SH "CONFORMING TO"
C99.
.SH "SEE ALSO"
.BR strspn (3),
.BR wcscspn (3)
.SH COLOPHON
This page is part of release 3.28 of the Linux
.I man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.