/* Duplicate handle for selection of locales. Copyright (C) 1997, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <locale.h> #include <bits/libc-lock.h> #include <stdlib.h> #include <string.h> #include <localeinfo.h> /* Lock for protecting global data. */ __libc_lock_define (extern , __libc_setlocale_lock attribute_hidden) __locale_t __duplocale (__locale_t dataset) { /* This static object is returned for newlocale (LC_ALL_MASK, "C"). */ if (dataset == &_nl_C_locobj) return dataset; __locale_t result; int cnt; size_t names_len = 0; /* Calculate the total space we need to store all the names. */ for (cnt = 0; cnt < __LC_LAST; ++cnt) if (cnt != LC_ALL && dataset->__names[cnt] != _nl_C_name) names_len += strlen (dataset->__names[cnt]) + 1; /* Get memory. */ result = malloc (sizeof (struct __locale_struct) + names_len); if (result != NULL) { char *namep = (char *) (result + 1); /* We modify global data (the usage counts). */ __libc_lock_lock (__libc_setlocale_lock); for (cnt = 0; cnt < __LC_LAST; ++cnt) if (cnt != LC_ALL) { result->__locales[cnt] = dataset->__locales[cnt]; if (result->__locales[cnt]->usage_count < MAX_USAGE_COUNT) ++result->__locales[cnt]->usage_count; if (dataset->__names[cnt] == _nl_C_name) result->__names[cnt] = _nl_C_name; else { result->__names[cnt] = namep; namep = __stpcpy (namep, dataset->__names[cnt]) + 1; } } /* Update the special members. */ result->__ctype_b = dataset->__ctype_b; result->__ctype_tolower = dataset->__ctype_tolower; result->__ctype_toupper = dataset->__ctype_toupper; /* It's done. */ __libc_lock_unlock (__libc_setlocale_lock); } return result; } weak_alias (__duplocale, duplocale)