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/* hard-locale.c -- Determine whether a locale is hard.
Copyright (C) 1997-1999, 2002-2004, 2006-2007, 2009-2023 Free Software
Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "hard-locale.h"
#include <locale.h>
#include <stdlib.h>
#include <string.h>
bool
hard_locale (int category)
{
char locale[SETLOCALE_NULL_MAX];
if (setlocale_null_r (category, locale, sizeof (locale)))
return false;
if (!(strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0))
return true;
#if defined __ANDROID__
/* On Android 5.0 or newer, it is possible to set a locale that has the same
name as the "C" locale but in fact uses UTF-8 encoding. Cf. test case 2 in
<https://lists.gnu.org/archive/html/bug-gnulib/2023-01/msg00141.html>. */
if (MB_CUR_MAX > 1)
return true;
#endif
return false;
}
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