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+.\" Copyright (c) 1990, 1991 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" Chris Torek and the American National Standards Committee X3,
+.\" on Information Processing Systems.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $OpenBSD: wcscspn.3,v 1.1 2011/07/09 16:32:11 nicm Exp $
+.\"
+.Dd $Mdocdate: July 9 2011 $
+.Dt WCSCSPN 3
+.Os
+.Sh NAME
+.Nm wcscspn
+.Nd span the complement of a wide string
+.Sh SYNOPSIS
+.Fd #include <wchar.h>
+.Ft size_t
+.Fn wcscspn "const wchar_t *s" "const wchar_t *charset"
+.Sh DESCRIPTION
+The
+.Fn wcscspn
+function spans the initial part of the wide string
+.Fa s
+as long as the wide characters from
+.Fa s
+do not occur in string
+.Fa charset
+(it spans the
+.Em complement
+of
+.Fa charset ) .
+.Sh RETURN VALUES
+The
+.Fn wcscspn
+function returns the number of wide characters spanned.
+.Sh SEE ALSO
+.Xr wcschr 3 ,
+.Xr wcspbrk 3 ,
+.Xr wcsrchr 3 ,
+.Xr wcsspn 3 ,
+.Xr wcsstr 3 ,
+.Xr wcstok 3 ,
+.Xr wmemchr 3
+.Sh STANDARDS
+The
+.Fn wcscspn
+function conforms to
+.St -isoC-99
+and was first introduced in
+.St -isoC-amd1 .