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-.\" Copyright (c) 1990, 1991, 1993
-.\"	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.
-.\" 4. 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.
-.\"
-.\"     @(#)strxfrm.3	8.1 (Berkeley) 6/4/93
-.\" FreeBSD: src/lib/libc/string/strxfrm.3,v 1.16 2002/09/06 11:24:06 tjr Exp
-.\" $FreeBSD: src/lib/libc/string/wcsxfrm.3,v 1.3 2007/01/09 00:28:12 imp Exp $
-.\"
-.Dd October 4, 2002
-.Dt WCSXFRM 3
-.Os
-.Sh NAME
-.Nm wcsxfrm ,
-.Nm wcsxfrm_l
-.Nd transform a wide string under locale
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In wchar.h
-.Ft size_t
-.Fo wcsxfrm
-.Fa "wchar_t *restrict ws1"
-.Fa "const wchar_t *restrict ws2"
-.Fa "size_t n"
-.Fc
-.In wchar.h
-.In xlocale.h
-.Ft size_t
-.Fo wcsxfrm_l
-.Fa "wchar_t *restrict ws1"
-.Fa "const wchar_t *restrict ws2"
-.Fa "size_t n"
-.Fa "locale_t loc"
-.Fc
-.Sh DESCRIPTION
-The
-.Fn wcsxfrm
-function transforms a null-terminated wide character string pointed to by
-.Fa ws2 ,
-according to the current locale's collation order,
-then copies the transformed string into
-.Fa ws1 .
-No more than
-.Fa n
-wide characters are copied into
-.Fa ws1 ,
-including the terminating null character.
-If
-.Fa n
-is set to 0
-(it helps to determine an actual size needed
-for transformation),
-.Fa ws1
-is permitted to be a
-.Dv NULL
-pointer.
-.Pp
-Comparing two strings using
-.Fn wcscmp
-after
-.Fn wcsxfrm
-is equivalent to comparing
-two original strings with
-.Fn wcscoll .
-.Pp
-Although the
-.Fn wcsxfrm
-function uses the current locale, the
-.Fn wcsxfrm_l
-function may be passed a locale directly. See
-.Xr xlocale 3
-for more information.
-.Sh RETURN VALUES
-Upon successful completion,
-.Fn wcsxfrm
-returns the length of the transformed string not including
-the terminating null character.
-If this value is
-.Fa n
-or more, the contents of
-.Fa ws1
-are indeterminate.
-.Sh SEE ALSO
-.Xr setlocale 3 ,
-.Xr strxfrm 3 ,
-.Xr wcscmp 3 ,
-.Xr wcscoll 3 ,
-.Xr xlocale 3
-.Sh STANDARDS
-The
-.Fn wcsxfrm
-function
-conforms to
-.St -isoC-99 .
-.Sh BUGS
-The current implementation of
-.Fn wcsxfrm
-only works in single-byte
-.Dv LC_CTYPE
-locales, and falls back to using
-.Fn wcsncpy
-in locales with extended character sets.
-.Pp
-Comparing two strings using
-.Fn wcscmp
-after
-.Fn wcsxfrm
-is
-.Em not
-always equivalent to comparison with
-.Fn wcscoll ;
-.Fn wcsxfrm
-only stores information about primary collation weights into
-.Fa ws1 ,
-whereas
-.Fn wcscoll
-compares characters using both primary and secondary weights.