man nl_langinfo () - language information

NAME

nl_langinfo - language information

SYNOPSIS

#include <langinfo.h>

char *nl_langinfo(nl_item item);

DESCRIPTION

The nl_langinfo() function shall return a pointer to a string containing information relevant to the particular language or cultural area defined in the program's locale (see <langinfo.h>). The manifest constant names and values of item are defined in <langinfo.h>. For example: 

nl_langinfo(ABDAY_1)




would return a pointer to the string "Dom" if the identified
language was Portuguese, and "Sun" if the
identified language was English.


Calls to setlocale() with a category corresponding to the category
of
item (see <langinfo.h>), or to the category LC_ALL
, may
overwrite the array pointed to by the return value.


The nl_langinfo() function need not be reentrant. A function
that is not required to be reentrant is not required to be
thread-safe.

RETURN VALUE

In a locale where langinfo data is not defined, nl_langinfo()
shall return a pointer to the corresponding string
in the POSIX locale. In all locales, nl_langinfo() shall return
a pointer to an empty string if item contains an
invalid setting.


This pointer may point to static data that may be overwritten on the
next call.

ERRORS

No errors are defined.


The following sections are informative.

EXAMPLES
Getting Date and Time Formatting Information

The following example returns a pointer to a string containing date
and time formatting information, as defined in the
LC_TIME category of the current locale.


#include <time.h>
#include <langinfo.h>
...
strftime(datestring, sizeof(datestring), nl_langinfo(D_T_FMT), tm);
...



APPLICATION USAGE

The array pointed to by the return value should not be modified by
the program, but may be modified by further calls to
nl_langinfo().

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

setlocale() , the Base Definitions volume of IEEE Std 1003.1-2001,
Chapter 7, Locale, <langinfo.h>, <nl_types.h>

COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .