1/* hard-locale.c -- Determine whether a locale is hard. 2 3 Copyright (C) 1997-1999, 2002-2005, 2007 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 3 of the License, or 8 (at your option) 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, see <http://www.gnu.org/licenses/>. */ 17 18#ifdef HAVE_CONFIG_H 19# include <config.h> 20#endif 21 22#include "hard-locale.h" 23 24#include <locale.h> 25#include <stdlib.h> 26#include <string.h> 27 28#ifdef __GLIBC__ 29# define GLIBC_VERSION __GLIBC__ 30#else 31# define GLIBC_VERSION 0 32#endif 33 34/* Return true if the current CATEGORY locale is hard, i.e. if you 35 can't get away with assuming traditional C or POSIX behavior. */ 36bool 37hard_locale (int category) 38{ 39 bool hard = true; 40 char const *p = setlocale (category, NULL); 41 42 if (p) 43 { 44 if (2 <= GLIBC_VERSION) 45 { 46 if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0) 47 hard = false; 48 } 49 else 50 { 51 char *locale = strdup (p); 52 if (locale) 53 { 54 /* Temporarily set the locale to the "C" and "POSIX" locales 55 to find their names, so that we can determine whether one 56 or the other is the caller's locale. */ 57 if (((p = setlocale (category, "C")) 58 && strcmp (p, locale) == 0) 59 || ((p = setlocale (category, "POSIX")) 60 && strcmp (p, locale) == 0)) 61 hard = false; 62 63 /* Restore the caller's locale. */ 64 setlocale (category, locale); 65 free (locale); 66 } 67 } 68 } 69 70 return hard; 71} 72