1 /* hard-locale.c -- Determine whether a locale is hard. 2 3 Copyright (C) 1997-1999, 2002-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include "hard-locale.h" 24 25 #include <locale.h> 26 #include <stdlib.h> 27 #include <string.h> 28 29 #include "strdup.h" 30 31 #ifdef __GLIBC__ 32 # define GLIBC_VERSION __GLIBC__ 33 #else 34 # define GLIBC_VERSION 0 35 #endif 36 37 /* Return true if the current CATEGORY locale is hard, i.e. if you 38 can't get away with assuming traditional C or POSIX behavior. */ 39 bool 40 hard_locale (int category) 41 { 42 bool hard = true; 43 char const *p = setlocale (category, NULL); 44 45 if (p) 46 { 47 if (2 <= GLIBC_VERSION) 48 { 49 if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0) 50 hard = false; 51 } 52 else 53 { 54 char *locale = strdup (p); 55 if (locale) 56 { 57 /* Temporarily set the locale to the "C" and "POSIX" locales 58 to find their names, so that we can determine whether one 59 or the other is the caller's locale. */ 60 if (((p = setlocale (category, "C")) 61 && strcmp (p, locale) == 0) 62 || ((p = setlocale (category, "POSIX")) 63 && strcmp (p, locale) == 0)) 64 hard = false; 65 66 /* Restore the caller's locale. */ 67 setlocale (category, locale); 68 free (locale); 69 } 70 } 71 } 72 73 return hard; 74 } 75