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126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* Implementation of the textdomain(3) function.
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Copyright (C) 1995-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "gettextP.h"
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#ifdef _LIBC
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# include <libintl.h>
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#else
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# include "libgnuintl.h"
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#endif
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/* Handle multi-threaded applications. */
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#ifdef _LIBC
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# include <libc-lock.h>
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# define gl_rwlock_define __libc_rwlock_define
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# define gl_rwlock_wrlock __libc_rwlock_wrlock
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# define gl_rwlock_unlock __libc_rwlock_unlock
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#else
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# include "lock.h"
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#endif
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/* @@ end of prolog @@ */
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/* Names for the libintl functions are a problem. They must not clash
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with existing names and they should follow ANSI C. But this source
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code is also used in GNU C Library where the names have a __
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prefix. So we have to make a difference here. */
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#ifdef _LIBC
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# define TEXTDOMAIN __textdomain
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# ifndef strdup
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# define strdup(str) __strdup (str)
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# endif
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#else
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# define TEXTDOMAIN libintl_textdomain
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#endif
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/* Lock variable to protect the global data in the gettext implementation. */
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gl_rwlock_define (extern, _nl_state_lock attribute_hidden)
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/* Set the current default message catalog to DOMAINNAME.
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If DOMAINNAME is null, return the current default.
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If DOMAINNAME is "", reset to the default of "messages". */
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char *
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TEXTDOMAIN (const char *domainname)
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{
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char *new_domain;
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char *old_domain;
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/* A NULL pointer requests the current setting. */
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if (domainname == NULL)
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return (char *) _nl_current_default_domain;
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gl_rwlock_wrlock (_nl_state_lock);
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old_domain = (char *) _nl_current_default_domain;
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/* If domain name is the null string set to default domain "messages". */
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if (domainname[0] == '\0'
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|| strcmp (domainname, _nl_default_default_domain) == 0)
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{
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_nl_current_default_domain = _nl_default_default_domain;
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new_domain = (char *) _nl_current_default_domain;
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}
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else if (strcmp (domainname, old_domain) == 0)
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/* This can happen and people will use it to signal that some
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environment variable changed. */
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new_domain = old_domain;
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else
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{
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/* If the following malloc fails `_nl_current_default_domain'
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will be NULL. This value will be returned and so signals we
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are out of core. */
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#if defined _LIBC || defined HAVE_STRDUP
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new_domain = strdup (domainname);
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#else
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size_t len = strlen (domainname) + 1;
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new_domain = (char *) malloc (len);
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if (new_domain != NULL)
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memcpy (new_domain, domainname, len);
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#endif
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if (new_domain != NULL)
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_nl_current_default_domain = new_domain;
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}
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/* We use this possibility to signal a change of the loaded catalogs
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since this is most likely the case and there is no other easy we
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to do it. Do it only when the call was successful. */
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if (new_domain != NULL)
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{
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++_nl_msg_cat_cntr;
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if (old_domain != new_domain && old_domain != _nl_default_default_domain)
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free (old_domain);
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}
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gl_rwlock_unlock (_nl_state_lock);
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return new_domain;
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}
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#ifdef _LIBC
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/* Alias for function name in GNU C Library. */
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weak_alias (__textdomain, textdomain);
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#endif
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