/* hard-locale.c -- Determine whether a locale is hard. Copyright (C) 1997-1999, 2002-2005, 2007 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #ifdef HAVE_CONFIG_H # include #endif #include "hard-locale.h" #include #include #include #ifdef __GLIBC__ # define GLIBC_VERSION __GLIBC__ #else # define GLIBC_VERSION 0 #endif /* Return true if the current CATEGORY locale is hard, i.e. if you can't get away with assuming traditional C or POSIX behavior. */ bool hard_locale (int category) { bool hard = true; char const *p = setlocale (category, NULL); if (p) { if (2 <= GLIBC_VERSION) { if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0) hard = false; } else { char *locale = strdup (p); if (locale) { /* Temporarily set the locale to the "C" and "POSIX" locales to find their names, so that we can determine whether one or the other is the caller's locale. */ if (((p = setlocale (category, "C")) && strcmp (p, locale) == 0) || ((p = setlocale (category, "POSIX")) && strcmp (p, locale) == 0)) hard = false; /* Restore the caller's locale. */ setlocale (category, locale); free (locale); } } } return hard; }