* elf/dl-close.c (_dl_close_worker): Remove all to be removed
[glibc/pb-stable.git] / intl / textdomain.c
blob1c23e94d762ed9be88687e642e4ab987c39d9445
1 /* Implementation of the textdomain(3) function.
2 Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
24 #include <stdlib.h>
25 #include <string.h>
27 #ifdef _LIBC
28 # include <libintl.h>
29 #else
30 # include "libgnuintl.h"
31 #endif
32 #include "gettextP.h"
34 #ifdef _LIBC
35 /* We have to handle multi-threaded applications. */
36 # include <bits/libc-lock.h>
37 #else
38 /* Provide dummy implementation if this is outside glibc. */
39 # define __libc_rwlock_define(CLASS, NAME)
40 # define __libc_rwlock_wrlock(NAME)
41 # define __libc_rwlock_unlock(NAME)
42 #endif
44 /* The internal variables in the standalone libintl.a must have different
45 names than the internal variables in GNU libc, otherwise programs
46 using libintl.a cannot be linked statically. */
47 #if !defined _LIBC
48 # define _nl_default_default_domain libintl_nl_default_default_domain
49 # define _nl_current_default_domain libintl_nl_current_default_domain
50 #endif
52 /* @@ end of prolog @@ */
54 /* Name of the default text domain. */
55 extern const char _nl_default_default_domain[] attribute_hidden;
57 /* Default text domain in which entries for gettext(3) are to be found. */
58 extern const char *_nl_current_default_domain attribute_hidden;
61 /* Names for the libintl functions are a problem. They must not clash
62 with existing names and they should follow ANSI C. But this source
63 code is also used in GNU C Library where the names have a __
64 prefix. So we have to make a difference here. */
65 #ifdef _LIBC
66 # define TEXTDOMAIN __textdomain
67 # ifndef strdup
68 # define strdup(str) __strdup (str)
69 # endif
70 #else
71 # define TEXTDOMAIN libintl_textdomain
72 #endif
74 /* Lock variable to protect the global data in the gettext implementation. */
75 __libc_rwlock_define (extern, _nl_state_lock attribute_hidden)
77 /* Set the current default message catalog to DOMAINNAME.
78 If DOMAINNAME is null, return the current default.
79 If DOMAINNAME is "", reset to the default of "messages". */
80 char *
81 TEXTDOMAIN (domainname)
82 const char *domainname;
84 char *new_domain;
85 char *old_domain;
87 /* A NULL pointer requests the current setting. */
88 if (domainname == NULL)
89 return (char *) _nl_current_default_domain;
91 __libc_rwlock_wrlock (_nl_state_lock);
93 old_domain = (char *) _nl_current_default_domain;
95 /* If domain name is the null string set to default domain "messages". */
96 if (domainname[0] == '\0'
97 || strcmp (domainname, _nl_default_default_domain) == 0)
99 _nl_current_default_domain = _nl_default_default_domain;
100 new_domain = (char *) _nl_current_default_domain;
102 else if (strcmp (domainname, old_domain) == 0)
103 /* This can happen and people will use it to signal that some
104 environment variable changed. */
105 new_domain = old_domain;
106 else
108 /* If the following malloc fails `_nl_current_default_domain'
109 will be NULL. This value will be returned and so signals we
110 are out of core. */
111 #if defined _LIBC || defined HAVE_STRDUP
112 new_domain = strdup (domainname);
113 #else
114 size_t len = strlen (domainname) + 1;
115 new_domain = (char *) malloc (len);
116 if (new_domain != NULL)
117 memcpy (new_domain, domainname, len);
118 #endif
120 if (new_domain != NULL)
121 _nl_current_default_domain = new_domain;
124 /* We use this possibility to signal a change of the loaded catalogs
125 since this is most likely the case and there is no other easy we
126 to do it. Do it only when the call was successful. */
127 if (new_domain != NULL)
129 ++_nl_msg_cat_cntr;
131 if (old_domain != new_domain && old_domain != _nl_default_default_domain)
132 free (old_domain);
135 __libc_rwlock_unlock (_nl_state_lock);
137 return new_domain;
140 #ifdef _LIBC
141 /* Alias for function name in GNU C Library. */
142 weak_alias (__textdomain, textdomain);
143 #endif