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/* localename.c - Determine the current selected locale.
* Copyright (C) 1995-1999, 2000-2003, 2007,
* 2008 Free Software Foundation, Inc.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of either
*
* - the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* or
*
* - the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* or both in parallel, as here.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* Written by Ulrich Drepper <drepper@gnu.org>, 1995. */
/* Win32 code written by Tor Lillqvist <tml@iki.fi>. */
/* Modified for GpgOL use by Werner Koch <wk@gnupg.org>, 2005. */
/* Modified for GnuPG use by Werner Koch <wk@gnupg.org>, 2007 */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#include <gpg-error.h> /* We need gettext_localename for W32. */
#include "../common/w32help.h"
/* XPG3 defines the result of 'setlocale (category, NULL)' as:
"Directs 'setlocale()' to query 'category' and return the current
setting of 'local'."
However it does not specify the exact format. Neither do SUSV2 and
ISO C 99. So we can use this feature only on selected systems (e.g.
those using GNU C Library). */
#if defined _LIBC || (defined __GNU_LIBRARY__ && __GNU_LIBRARY__ >= 2)
# define HAVE_LOCALE_NULL
#endif
/* Use a dummy value for LC_MESSAGES in case it is not defined. This
works because we always test for HAVE_LC_MESSAGES and the core
function takes the category as a string as well. */
#ifndef HAVE_LC_MESSAGES
#define LC_MESSAGES 0
#endif
/* Determine the current locale's name, and canonicalize it into XPG syntax
language[_territory[.codeset]][@modifier]
The codeset part in the result is not reliable; the locale_charset()
should be used for codeset information instead.
The result must not be freed; it is statically allocated. */
#ifndef HAVE_W32_SYSTEM
static const char *
do_nl_locale_name (int category, const char *categoryname)
{
const char *retval;
/* Use the POSIX methods of looking to 'LC_ALL', 'LC_xxx', and 'LANG'.
On some systems this can be done by the 'setlocale' function itself. */
# if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL
(void)categoryname;
retval = setlocale (category, NULL);
# else
(void)category;
/* Setting of LC_ALL overwrites all other. */
retval = getenv ("LC_ALL");
if (retval == NULL || retval[0] == '\0')
{
/* Next comes the name of the desired category. */
retval = getenv (categoryname);
if (retval == NULL || retval[0] == '\0')
{
/* Last possibility is the LANG environment variable. */
retval = getenv ("LANG");
if (retval == NULL || retval[0] == '\0')
/* We use C as the default domain. POSIX says this is
implementation defined. */
retval = "C";
}
}
# endif
return retval;
}
#endif /* HAVE_W32_SYSTEM */
/* Return the locale used for translatable messages. The standard C
and POSIX are locale names are mapped to an empty string. If a
locale can't be found an empty string will be returned. */
const char *
gnupg_messages_locale_name (void)
{
const char *s;
#ifdef HAVE_W32_SYSTEM
/* We use the localename function libgpg-error. */
s = gettext_localename ();
#else
s = do_nl_locale_name (LC_MESSAGES, "LC_MESSAGES");
#endif
if (!s)
s = "";
else if (!strcmp (s, "C") || !strcmp (s, "POSIX"))
s = "";
return s;
}
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