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+'\" t
+.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
+.\"
+.\" SPDX-License-Identifier: GPL-2.0-or-later
+.\"
+.\" 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 (date) "Linux man-pages (unreleased)"
+.SH NAME
+wcscspn \- search a wide-character string for any of a set of wide characters
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <wchar.h>
+.P
+.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
+.I wcs
+which consists entirely of wide-characters not listed in
+.IR reject .
+In
+other words, it searches for the first occurrence in the wide-character
+string
+.I wcs
+of any of the characters in the wide-character string
+.IR reject .
+.SH RETURN VALUE
+The
+.BR wcscspn ()
+function returns the number of
+wide characters in the longest
+initial segment of
+.I wcs
+which consists entirely of wide-characters not
+listed in
+.IR reject .
+In other words, it returns the position of the first
+occurrence in the wide-character string
+.I wcs
+of any of the characters in
+the wide-character string
+.IR reject ,
+or
+.I wcslen(wcs)
+if there is none.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR wcscspn ()
+T}	Thread safety	MT-Safe
+.TE
+.SH STANDARDS
+C11, POSIX.1-2008.
+.SH HISTORY
+POSIX.1-2001, C99.
+.SH SEE ALSO
+.BR strcspn (3),
+.BR wcspbrk (3),
+.BR wcsspn (3)