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[thirdparty/man-pages.git] / man3 / wcscspn.3

.\" 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.
.\"
.\" 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 WCSCSPN 3  1999-07-25 "GNU" "Linux Programmer's Manual"
.SH NAME
wcscspn \- search a wide-character string for any of a set of wide characters
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.sp
.BI "size_t wcscspn(const wchar_t *" wcs ", const wchar_t *" reject );
.fi
.SH DESCRIPTION
The
.BR wcscspn ()
function is the wide-character equivalent
of the
.BR strcspn (3)
function.
It determines the length of the longest initial segment of \fIwcs\fP
which consists entirely of wide-characters not listed in \fIreject\fP.
In
other words, it searches for the first occurrence in the wide-character
string \fIwcs\fP of any of the characters in the wide-character string
\fIreject\fP.
.SH RETURN VALUE
The
.BR wcscspn ()
function returns the number of
wide characters in the longest
initial segment of \fIwcs\fP which consists entirely of wide-characters not
listed in \fIreject\fP.
In other words, it returns the position of the first
occurrence in the wide-character string \fIwcs\fP
of any of the characters in
the wide-character string \fIreject\fP,
or \fIwcslen(wcs)\fP if there is none.
.SH CONFORMING TO
C99.
.SH SEE ALSO
.BR strcspn (3),
.BR wcspbrk (3),
.BR wcsspn (3)