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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 AJ |
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. */ | |
24906b43 RM |
19 | |
20 | #ifdef HAVE_CONFIG_H | |
21 | # include <config.h> | |
22 | #endif | |
23 | ||
0555fcce UD |
24 | #include <stdlib.h> |
25 | #include <string.h> | |
24906b43 RM |
26 | |
27 | #ifdef _LIBC | |
28 | # include <libintl.h> | |
29 | #else | |
4a4d50f3 | 30 | # include "libgnuintl.h" |
24906b43 | 31 | #endif |
0ed99ce4 UD |
32 | #include "gettextP.h" |
33 | ||
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. */ | |
0a55a284 UD |
39 | # define __libc_rwlock_define(CLASS, NAME) |
40 | # define __libc_rwlock_wrlock(NAME) | |
41 | # define __libc_rwlock_unlock(NAME) | |
0ed99ce4 | 42 | #endif |
24906b43 | 43 | |
52d895a4 UD |
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 | |
0f131646 RM |
48 | # define _nl_default_default_domain libintl_nl_default_default_domain |
49 | # define _nl_current_default_domain libintl_nl_current_default_domain | |
52d895a4 UD |
50 | #endif |
51 | ||
24906b43 RM |
52 | /* @@ end of prolog @@ */ |
53 | ||
54 | /* Name of the default text domain. */ | |
418f1701 | 55 | extern const char _nl_default_default_domain[] attribute_hidden; |
24906b43 RM |
56 | |
57 | /* Default text domain in which entries for gettext(3) are to be found. */ | |
418f1701 | 58 | extern const char *_nl_current_default_domain attribute_hidden; |
24906b43 RM |
59 | |
60 | ||
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 | |
f38931a9 UD |
67 | # ifndef strdup |
68 | # define strdup(str) __strdup (str) | |
69 | # endif | |
24906b43 | 70 | #else |
0f131646 | 71 | # define TEXTDOMAIN libintl_textdomain |
24906b43 RM |
72 | #endif |
73 | ||
0ed99ce4 | 74 | /* Lock variable to protect the global data in the gettext implementation. */ |
418f1701 | 75 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) |
0ed99ce4 | 76 | |
24906b43 RM |
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; | |
83 | { | |
0ed99ce4 UD |
84 | char *new_domain; |
85 | char *old_domain; | |
24906b43 RM |
86 | |
87 | /* A NULL pointer requests the current setting. */ | |
88 | if (domainname == NULL) | |
89 | return (char *) _nl_current_default_domain; | |
90 | ||
0ed99ce4 UD |
91 | __libc_rwlock_wrlock (_nl_state_lock); |
92 | ||
93 | old_domain = (char *) _nl_current_default_domain; | |
24906b43 RM |
94 | |
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) | |
0ed99ce4 UD |
98 | { |
99 | _nl_current_default_domain = _nl_default_default_domain; | |
100 | new_domain = (char *) _nl_current_default_domain; | |
101 | } | |
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; | |
24906b43 RM |
106 | else |
107 | { | |
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. */ | |
40a55d20 | 111 | #if defined _LIBC || defined HAVE_STRDUP |
0ed99ce4 | 112 | new_domain = strdup (domainname); |
40a55d20 | 113 | #else |
24906b43 | 114 | size_t len = strlen (domainname) + 1; |
0ed99ce4 UD |
115 | new_domain = (char *) malloc (len); |
116 | if (new_domain != NULL) | |
117 | memcpy (new_domain, domainname, len); | |
40a55d20 | 118 | #endif |
0ed99ce4 UD |
119 | |
120 | if (new_domain != NULL) | |
121 | _nl_current_default_domain = new_domain; | |
122 | } | |
123 | ||
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) | |
128 | { | |
129 | ++_nl_msg_cat_cntr; | |
130 | ||
131 | if (old_domain != new_domain && old_domain != _nl_default_default_domain) | |
132 | free (old_domain); | |
24906b43 RM |
133 | } |
134 | ||
0ed99ce4 | 135 | __libc_rwlock_unlock (_nl_state_lock); |
24906b43 | 136 | |
0ed99ce4 | 137 | return new_domain; |
24906b43 RM |
138 | } |
139 | ||
140 | #ifdef _LIBC | |
141 | /* Alias for function name in GNU C Library. */ | |
142 | weak_alias (__textdomain, textdomain); | |
143 | #endif |