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/* Implementation of the textdomain(3) function.
Copyright (C) 1995-2016 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 <bits/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