1 /* hard-locale.c -- Determine whether a locale is hard.
2
3 Copyright (C) 1997, 1998, 1999, 2002, 2003 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18
19 #if HAVE_CONFIG_H
20 # include <config.h>
21 #endif
22
23 #include "hard-locale.h"
24
25 #if HAVE_LOCALE_H
26 # include <locale.h>
27 #endif
28
29 #include <stdlib.h>
30 #include <string.h>
31
32 /* Return nonzero if the current CATEGORY locale is hard, i.e. if you
33 can't get away with assuming traditional C or POSIX behavior. */
34 int
hard_locale(int category)35 hard_locale (int category)
36 {
37 #if ! HAVE_SETLOCALE
38 return 0;
39 #else
40
41 int hard = 1;
42 char const *p = setlocale (category, 0);
43
44 if (p)
45 {
46 # if defined __GLIBC__ && 2 <= __GLIBC__
47 if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0)
48 hard = 0;
49 # else
50 char *locale = malloc (strlen (p) + 1);
51 if (locale)
52 {
53 strcpy (locale, p);
54
55 /* Temporarily set the locale to the "C" and "POSIX" locales
56 to find their names, so that we can determine whether one
57 or the other is the caller's locale. */
58 if (((p = setlocale (category, "C"))
59 && strcmp (p, locale) == 0)
60 || ((p = setlocale (category, "POSIX"))
61 && strcmp (p, locale) == 0))
62 hard = 0;
63
64 /* Restore the caller's locale. */
65 setlocale (category, locale);
66 free (locale);
67 }
68 # endif
69 }
70
71 return hard;
72
73 #endif
74 }
75