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.\"	@(#)tolower.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: src/lib/libc/locale/towlower.3,v 1.6 2007/01/09 00:28:01 imp Exp $
.\"
.Dd October 3, 2002
.Dt TOWLOWER 3
.Os
.Sh NAME
.Nm towlower ,
.Nm towlower_l
.Nd "upper case to lower case letter conversion (wide character version)"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In wctype.h
.Ft wint_t
.Fo towlower
.Fa "wint_t wc"
.Fc
.In wctype.h
.In xlocale.h
.Ft wint_t
.Fo towlower_l
.Fa "wint_t wc"
.Fa "locale_t loc"
.Fc
.Sh DESCRIPTION
The
.Fn towlower
function converts an upper-case letter to the corresponding lower-case
letter.
.Pp
Although the
.Fn towlower
function uses the current locale, the
.Fn towlower_l
function may be passed a locale directly. See
.Xr xlocale 3
for more information.
.Sh RETURN VALUES
If the argument is an upper-case letter, the
.Fn towlower
function returns the corresponding lower-case letter if there is
one; otherwise, the argument is returned unchanged.
.Sh SEE ALSO
.Xr iswlower 3 ,
.Xr tolower 3 ,
.Xr towupper 3 ,
.Xr wctrans 3 ,
.Xr xlocale 3
.Sh STANDARDS
The
.Fn towlower
function conforms to
.St -isoC-99 .