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 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