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c84142e8 | 1 | /* Implementation of the textdomain(3) function. |
418f1701 | 2 | Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. |
41bdb6e2 | 3 | This file is part of the GNU C Library. |
24906b43 | 4 | |
c84142e8 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
0393dfd6 | 9 | |
c84142e8 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
24906b43 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
24906b43 RM |
18 | |
19 | #ifdef HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
0555fcce UD |
23 | #include <stdlib.h> |
24 | #include <string.h> | |
24906b43 RM |
25 | |
26 | #ifdef _LIBC | |
27 | # include <libintl.h> | |
28 | #else | |
4a4d50f3 | 29 | # include "libgnuintl.h" |
24906b43 | 30 | #endif |
0ed99ce4 UD |
31 | #include "gettextP.h" |
32 | ||
33 | #ifdef _LIBC | |
34 | /* We have to handle multi-threaded applications. */ | |
35 | # include <bits/libc-lock.h> | |
36 | #else | |
37 | /* Provide dummy implementation if this is outside glibc. */ | |
0a55a284 UD |
38 | # define __libc_rwlock_define(CLASS, NAME) |
39 | # define __libc_rwlock_wrlock(NAME) | |
40 | # define __libc_rwlock_unlock(NAME) | |
0ed99ce4 | 41 | #endif |
24906b43 | 42 | |
52d895a4 UD |
43 | /* The internal variables in the standalone libintl.a must have different |
44 | names than the internal variables in GNU libc, otherwise programs | |
45 | using libintl.a cannot be linked statically. */ | |
46 | #if !defined _LIBC | |
0f131646 RM |
47 | # define _nl_default_default_domain libintl_nl_default_default_domain |
48 | # define _nl_current_default_domain libintl_nl_current_default_domain | |
52d895a4 UD |
49 | #endif |
50 | ||
24906b43 RM |
51 | /* @@ end of prolog @@ */ |
52 | ||
53 | /* Name of the default text domain. */ | |
418f1701 | 54 | extern const char _nl_default_default_domain[] attribute_hidden; |
24906b43 RM |
55 | |
56 | /* Default text domain in which entries for gettext(3) are to be found. */ | |
418f1701 | 57 | extern const char *_nl_current_default_domain attribute_hidden; |
24906b43 RM |
58 | |
59 | ||
60 | /* Names for the libintl functions are a problem. They must not clash | |
61 | with existing names and they should follow ANSI C. But this source | |
62 | code is also used in GNU C Library where the names have a __ | |
63 | prefix. So we have to make a difference here. */ | |
64 | #ifdef _LIBC | |
65 | # define TEXTDOMAIN __textdomain | |
f38931a9 UD |
66 | # ifndef strdup |
67 | # define strdup(str) __strdup (str) | |
68 | # endif | |
24906b43 | 69 | #else |
0f131646 | 70 | # define TEXTDOMAIN libintl_textdomain |
24906b43 RM |
71 | #endif |
72 | ||
0ed99ce4 | 73 | /* Lock variable to protect the global data in the gettext implementation. */ |
418f1701 | 74 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) |
0ed99ce4 | 75 | |
24906b43 RM |
76 | /* Set the current default message catalog to DOMAINNAME. |
77 | If DOMAINNAME is null, return the current default. | |
78 | If DOMAINNAME is "", reset to the default of "messages". */ | |
79 | char * | |
80 | TEXTDOMAIN (domainname) | |
81 | const char *domainname; | |
82 | { | |
0ed99ce4 UD |
83 | char *new_domain; |
84 | char *old_domain; | |
24906b43 RM |
85 | |
86 | /* A NULL pointer requests the current setting. */ | |
87 | if (domainname == NULL) | |
88 | return (char *) _nl_current_default_domain; | |
89 | ||
0ed99ce4 UD |
90 | __libc_rwlock_wrlock (_nl_state_lock); |
91 | ||
92 | old_domain = (char *) _nl_current_default_domain; | |
24906b43 RM |
93 | |
94 | /* If domain name is the null string set to default domain "messages". */ | |
95 | if (domainname[0] == '\0' | |
96 | || strcmp (domainname, _nl_default_default_domain) == 0) | |
0ed99ce4 UD |
97 | { |
98 | _nl_current_default_domain = _nl_default_default_domain; | |
99 | new_domain = (char *) _nl_current_default_domain; | |
100 | } | |
101 | else if (strcmp (domainname, old_domain) == 0) | |
102 | /* This can happen and people will use it to signal that some | |
103 | environment variable changed. */ | |
104 | new_domain = old_domain; | |
24906b43 RM |
105 | else |
106 | { | |
107 | /* If the following malloc fails `_nl_current_default_domain' | |
108 | will be NULL. This value will be returned and so signals we | |
109 | are out of core. */ | |
40a55d20 | 110 | #if defined _LIBC || defined HAVE_STRDUP |
0ed99ce4 | 111 | new_domain = strdup (domainname); |
40a55d20 | 112 | #else |
24906b43 | 113 | size_t len = strlen (domainname) + 1; |
0ed99ce4 UD |
114 | new_domain = (char *) malloc (len); |
115 | if (new_domain != NULL) | |
116 | memcpy (new_domain, domainname, len); | |
40a55d20 | 117 | #endif |
0ed99ce4 UD |
118 | |
119 | if (new_domain != NULL) | |
120 | _nl_current_default_domain = new_domain; | |
121 | } | |
122 | ||
123 | /* We use this possibility to signal a change of the loaded catalogs | |
124 | since this is most likely the case and there is no other easy we | |
125 | to do it. Do it only when the call was successful. */ | |
126 | if (new_domain != NULL) | |
127 | { | |
128 | ++_nl_msg_cat_cntr; | |
129 | ||
130 | if (old_domain != new_domain && old_domain != _nl_default_default_domain) | |
131 | free (old_domain); | |
24906b43 RM |
132 | } |
133 | ||
0ed99ce4 | 134 | __libc_rwlock_unlock (_nl_state_lock); |
24906b43 | 135 | |
0ed99ce4 | 136 | return new_domain; |
24906b43 RM |
137 | } |
138 | ||
139 | #ifdef _LIBC | |
140 | /* Alias for function name in GNU C Library. */ | |
141 | weak_alias (__textdomain, textdomain); | |
142 | #endif |