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.\" Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
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.\" $FreeBSD: src/lib/libc/locale/nl_langinfo.3,v 1.4 2002/04/13 04:25:56 dd Exp $
.\"
.Dd May 3, 2001
.Dt NL_LANGINFO 3
.Os
.Sh NAME
.Nm nl_langinfo
.Nd language information
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In langinfo.h
.Ft char *
.Fn nl_langinfo "nl_item item"
.Sh DESCRIPTION
The
.Fn nl_langinfo
function returns a pointer to a string containing information relevant to
the particular language or cultural area defined in the program's locale.
The manifest constant names and values of
.Fa item
are defined in
.Aq Pa langinfo.h .
.Pp
Calls to
.Fn setlocale
with a category corresponding to the category of
.Fa item ,
or to the
category
.Dv LC_ALL ,
may overwrite buffer pointed by the return value.
.Sh EXAMPLES
For example:
.Pp
.Dl nl_langinfo(ABDAY_1)
.Pp
would return a pointer to the string
.Qq Li Dom
if the identified language was
Portuguese, and
.Qq Li Sun
if the identified language was English.
.Sh RETURN VALUES
In a locale where langinfo data is not defined,
.Fn nl_langinfo
returns a pointer to the corresponding string in the
.Tn POSIX
locale.
In all locales,
.Fn nl_langinfo
returns a pointer to an empty string if
.Fa item
contains an invalid setting.
.Sh SEE ALSO
.Xr setlocale 3
.Sh STANDARDS
The
.Fn nl_langinfo
function conforms to
.St -susv2 .
.Sh HISTORY
The
.Fn nl_langinfo
function first appeared in
.Fx 4.6 .