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