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/* hard-locale.c -- Determine whether a locale is hard.
Copyright 1997, 1998, 1999 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* $FreeBSD$ */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#ifndef __GNUC__
# ifdef HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifdef _AIX
# pragma alloca
# else
# ifdef _WIN32
# include <malloc.h>
# include <io.h>
# else
# ifndef alloca
char *alloca ();
# endif
# endif
# endif
# endif
#endif
#if HAVE_LOCALE_H
# include <locale.h>
#endif
#if HAVE_STRING_H
# include <string.h>
#endif
/* Return nonzero if the current CATEGORY locale is hard, i.e. if you
can't get away with assuming traditional C or POSIX behavior. */
int
hard_locale (int category)
{
#if ! HAVE_SETLOCALE
return 0;
#else
int hard = 1;
char const *p = setlocale (category, 0);
if (p)
{
# if defined(__FreeBSD__) || (defined __GLIBC__ && __GLIBC__ >= 2)
if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0)
hard = 0;
# else
char *locale = alloca (strlen (p) + 1);
strcpy (locale, p);
/* Temporarily set the locale to the "C" and "POSIX" locales to
find their names, so that we can determine whether one or the
other is the caller's locale. */
if (((p = setlocale (category, "C")) && strcmp (p, locale) == 0)
|| ((p = setlocale (category, "POSIX")) && strcmp (p, locale) == 0))
hard = 0;
/* Restore the caller's locale. */
setlocale (category, locale);
# endif
}
return hard;
#endif
}
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