1 /* hard-locale.c -- Determine whether a locale is hard. 2 3 Copyright (C) 1997, 1998, 1999, 2002, 2003, 2004 Free Software 4 Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software Foundation, 18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20 #ifdef HAVE_CONFIG_H 21 # include <config.h> 22 #endif 23 24 #include "hard-locale.h" 25 26 #include <locale.h> 27 #include <stdlib.h> 28 #include <string.h> 29 30 #include "strdup.h" 31 32 #ifdef __GLIBC__ 33 # define GLIBC_VERSION __GLIBC__ 34 #else 35 # define GLIBC_VERSION 0 36 #endif 37 38 /* Return true if the current CATEGORY locale is hard, i.e. if you 39 can't get away with assuming traditional C or POSIX behavior. */ 40 bool 41 hard_locale (int category) 42 { 43 bool hard = true; 44 char const *p = setlocale (category, NULL); 45 46 if (p) 47 { 48 if (2 <= GLIBC_VERSION) 49 { 50 if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0) 51 hard = false; 52 } 53 else 54 { 55 char *locale = strdup (p); 56 if (locale) 57 { 58 /* Temporarily set the locale to the "C" and "POSIX" locales 59 to find their names, so that we can determine whether one 60 or the other is the caller's locale. */ 61 if (((p = setlocale (category, "C")) 62 && strcmp (p, locale) == 0) 63 || ((p = setlocale (category, "POSIX")) 64 && strcmp (p, locale) == 0)) 65 hard = false; 66 67 /* Restore the caller's locale. */ 68 setlocale (category, locale); 69 free (locale); 70 } 71 } 72 } 73 74 return hard; 75 } 76
