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glibc/intl/textdomain.c
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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 <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 |