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.\" This code is derived from software contributed to Berkeley by
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.\"     @(#)strcoll.3	8.1 (Berkeley) 6/4/93
.\" FreeBSD: src/lib/libc/string/strcoll.3,v 1.11 2001/10/01 16:09:00 ru Exp
.\" $FreeBSD: src/lib/libc/string/wcscoll.3,v 1.2 2002/12/09 14:04:05 ru Exp $
.\"
.Dd October 4, 2002
.Dt WCSCOLL 3
.Os
.Sh NAME
.Nm wcscoll
.Nd compare wide strings according to current collation
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In wchar.h
.Ft int
.Fn wcscoll "const wchar_t *s1" "const wchar_t *s2"
.Sh DESCRIPTION
The
.Fn wcscoll
function compares the null-terminated strings
.Fa s1
and
.Fa s2
according to the current locale collation order.
In the
.Dq Li C
locale,
.Fn wcscoll
is equivalent to
.Fn wcscmp .
.Sh RETURN VALUES
The
.Fn wcscoll
function
returns an integer greater than, equal to, or less than 0,
if
.Fa s1
is greater than, equal to, or less than
.Fa s2 .
.Pp
No return value is reserved to indicate errors;
callers should set
.Va errno
to 0 before calling
.Fn wcscoll .
If it is non-zero upon return from
.Fn wcscoll ,
an error has occurred.
.Sh ERRORS
The
.Fn wcscoll
function will fail if:
.Bl -tag -width Er
.It Bq Er EILSEQ
An invalid wide character code was specified.
.It Bq Er ENOMEM
Cannot allocate enough memory for temporary buffers.
.El
.Sh SEE ALSO
.Xr setlocale 3 ,
.Xr strcoll 3 ,
.Xr wcscmp 3 ,
.Xr wcsxfrm 3
.Sh STANDARDS
The
.Fn wcscoll
function
conforms to
.St -isoC-99 .
.Sh BUGS
The current implementation of
.Fn wcscoll
only works in single-byte
.Dv LC_CTYPE
locales, and falls back to using
.Fn wcscmp
in locales with extended character sets.