| /* Implementation of the textdomain(3) function. |
| Copyright (C) 1995-2018 Free Software Foundation, Inc. |
| |
| This program 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. |
| |
| 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 Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "gettextP.h" |
| #ifdef _LIBC |
| # include <libintl.h> |
| #else |
| # include "libgnuintl.h" |
| #endif |
| |
| /* Handle multi-threaded applications. */ |
| #ifdef _LIBC |
| # include <libc-lock.h> |
| # define gl_rwlock_define __libc_rwlock_define |
| # define gl_rwlock_wrlock __libc_rwlock_wrlock |
| # define gl_rwlock_unlock __libc_rwlock_unlock |
| #else |
| # include "lock.h" |
| #endif |
| |
| /* @@ end of prolog @@ */ |
| |
| |
| /* Names for the libintl functions are a problem. They must not clash |
| with existing names and they should follow ANSI C. But this source |
| code is also used in GNU C Library where the names have a __ |
| prefix. So we have to make a difference here. */ |
| #ifdef _LIBC |
| # define TEXTDOMAIN __textdomain |
| # ifndef strdup |
| # define strdup(str) __strdup (str) |
| # endif |
| #else |
| # define TEXTDOMAIN libintl_textdomain |
| #endif |
| |
| /* Lock variable to protect the global data in the gettext implementation. */ |
| gl_rwlock_define (extern, _nl_state_lock attribute_hidden) |
| |
| /* Set the current default message catalog to DOMAINNAME. |
| If DOMAINNAME is null, return the current default. |
| If DOMAINNAME is "", reset to the default of "messages". */ |
| char * |
| TEXTDOMAIN (const char *domainname) |
| { |
| char *new_domain; |
| char *old_domain; |
| |
| /* A NULL pointer requests the current setting. */ |
| if (domainname == NULL) |
| return (char *) _nl_current_default_domain; |
| |
| gl_rwlock_wrlock (_nl_state_lock); |
| |
| old_domain = (char *) _nl_current_default_domain; |
| |
| /* If domain name is the null string set to default domain "messages". */ |
| if (domainname[0] == '\0' |
| || strcmp (domainname, _nl_default_default_domain) == 0) |
| { |
| _nl_current_default_domain = _nl_default_default_domain; |
| new_domain = (char *) _nl_current_default_domain; |
| } |
| else if (strcmp (domainname, old_domain) == 0) |
| /* This can happen and people will use it to signal that some |
| environment variable changed. */ |
| new_domain = old_domain; |
| else |
| { |
| /* If the following malloc fails `_nl_current_default_domain' |
| will be NULL. This value will be returned and so signals we |
| are out of core. */ |
| #if defined _LIBC || defined HAVE_STRDUP |
| new_domain = strdup (domainname); |
| #else |
| size_t len = strlen (domainname) + 1; |
| new_domain = (char *) malloc (len); |
| if (new_domain != NULL) |
| memcpy (new_domain, domainname, len); |
| #endif |
| |
| if (new_domain != NULL) |
| _nl_current_default_domain = new_domain; |
| } |
| |
| /* We use this possibility to signal a change of the loaded catalogs |
| since this is most likely the case and there is no other easy we |
| to do it. Do it only when the call was successful. */ |
| if (new_domain != NULL) |
| { |
| ++_nl_msg_cat_cntr; |
| |
| if (old_domain != new_domain && old_domain != _nl_default_default_domain) |
| free (old_domain); |
| } |
| |
| gl_rwlock_unlock (_nl_state_lock); |
| |
| return new_domain; |
| } |
| |
| #ifdef _LIBC |
| /* Alias for function name in GNU C Library. */ |
| weak_alias (__textdomain, textdomain); |
| #endif |