1 /* Implementation of the textdomain(3) function.
2 Copyright (C) 1995-1998, 2000, 2001 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 # include "libgnuintl.h"
33 /* We have to handle multi-threaded applications. */
34 # include <bits/libc-lock.h>
36 /* Provide dummy implementation if this is outside glibc. */
37 # define __libc_rwlock_define(CLASS, NAME)
38 # define __libc_rwlock_wrlock(NAME)
39 # define __libc_rwlock_unlock(NAME)
42 /* The internal variables in the standalone libintl.a must have different
43 names than the internal variables in GNU libc, otherwise programs
44 using libintl.a cannot be linked statically. */
46 # define _nl_default_default_domain _nl_default_default_domain__
47 # define _nl_current_default_domain _nl_current_default_domain__
50 /* @@ end of prolog @@ */
52 /* Name of the default text domain. */
53 extern const char _nl_default_default_domain
[];
55 /* Default text domain in which entries for gettext(3) are to be found. */
56 extern const char *_nl_current_default_domain
;
59 /* Names for the libintl functions are a problem. They must not clash
60 with existing names and they should follow ANSI C. But this source
61 code is also used in GNU C Library where the names have a __
62 prefix. So we have to make a difference here. */
64 # define TEXTDOMAIN __textdomain
66 # define strdup(str) __strdup (str)
69 # define TEXTDOMAIN textdomain__
72 /* Lock variable to protect the global data in the gettext implementation. */
73 __libc_rwlock_define (extern, _nl_state_lock
)
75 /* Set the current default message catalog to DOMAINNAME.
76 If DOMAINNAME is null, return the current default.
77 If DOMAINNAME is "", reset to the default of "messages". */
79 TEXTDOMAIN (domainname
)
80 const char *domainname
;
85 /* A NULL pointer requests the current setting. */
86 if (domainname
== NULL
)
87 return (char *) _nl_current_default_domain
;
89 __libc_rwlock_wrlock (_nl_state_lock
);
91 old_domain
= (char *) _nl_current_default_domain
;
93 /* If domain name is the null string set to default domain "messages". */
94 if (domainname
[0] == '\0'
95 || strcmp (domainname
, _nl_default_default_domain
) == 0)
97 _nl_current_default_domain
= _nl_default_default_domain
;
98 new_domain
= (char *) _nl_current_default_domain
;
100 else if (strcmp (domainname
, old_domain
) == 0)
101 /* This can happen and people will use it to signal that some
102 environment variable changed. */
103 new_domain
= old_domain
;
106 /* If the following malloc fails `_nl_current_default_domain'
107 will be NULL. This value will be returned and so signals we
109 #if defined _LIBC || defined HAVE_STRDUP
110 new_domain
= strdup (domainname
);
112 size_t len
= strlen (domainname
) + 1;
113 new_domain
= (char *) malloc (len
);
114 if (new_domain
!= NULL
)
115 memcpy (new_domain
, domainname
, len
);
118 if (new_domain
!= NULL
)
119 _nl_current_default_domain
= new_domain
;
122 /* We use this possibility to signal a change of the loaded catalogs
123 since this is most likely the case and there is no other easy we
124 to do it. Do it only when the call was successful. */
125 if (new_domain
!= NULL
)
129 if (old_domain
!= new_domain
&& old_domain
!= _nl_default_default_domain
)
133 __libc_rwlock_unlock (_nl_state_lock
);
139 /* Alias for function name in GNU C Library. */
140 weak_alias (__textdomain
, textdomain
);