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1 | /* Implementation of the textdomain(3) function. |
2 | Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU Library General Public License as published | |
6 | by the Free Software Foundation; either version 2, or (at your option) | |
7 | any later version. | |
8 | ||
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 GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
17 | USA. */ | |
18 | ||
19 | #ifdef HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | ||
26 | #ifdef _LIBC | |
27 | # include <libintl.h> | |
28 | #else | |
29 | # include "libgnuintl.h" | |
30 | #endif | |
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. */ | |
38 | # define __libc_rwlock_define(CLASS, NAME) | |
39 | # define __libc_rwlock_wrlock(NAME) | |
40 | # define __libc_rwlock_unlock(NAME) | |
41 | #endif | |
42 | ||
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 | |
47 | # define _nl_default_default_domain libintl_nl_default_default_domain | |
48 | # define _nl_current_default_domain libintl_nl_current_default_domain | |
49 | #endif | |
50 | ||
51 | /* @@ end of prolog @@ */ | |
52 | ||
53 | /* Name of the default text domain. */ | |
54 | extern const char _nl_default_default_domain[] attribute_hidden; | |
55 | ||
56 | /* Default text domain in which entries for gettext(3) are to be found. */ | |
57 | extern const char *_nl_current_default_domain attribute_hidden; | |
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 | |
66 | # ifndef strdup | |
67 | # define strdup(str) __strdup (str) | |
68 | # endif | |
69 | #else | |
70 | # define TEXTDOMAIN libintl_textdomain | |
71 | #endif | |
72 | ||
73 | /* Lock variable to protect the global data in the gettext implementation. */ | |
74 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) | |
75 | ||
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 | { | |
83 | char *new_domain; | |
84 | char *old_domain; | |
85 | ||
86 | /* A NULL pointer requests the current setting. */ | |
87 | if (domainname == NULL) | |
88 | return (char *) _nl_current_default_domain; | |
89 | ||
90 | __libc_rwlock_wrlock (_nl_state_lock); | |
91 | ||
92 | old_domain = (char *) _nl_current_default_domain; | |
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) | |
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; | |
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. */ | |
110 | #if defined _LIBC || defined HAVE_STRDUP | |
111 | new_domain = strdup (domainname); | |
112 | #else | |
113 | size_t len = strlen (domainname) + 1; | |
114 | new_domain = (char *) malloc (len); | |
115 | if (new_domain != NULL) | |
116 | memcpy (new_domain, domainname, len); | |
117 | #endif | |
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); | |
132 | } | |
133 | ||
134 | __libc_rwlock_unlock (_nl_state_lock); | |
135 | ||
136 | return new_domain; | |
137 | } | |
138 | ||
139 | #ifdef _LIBC | |
140 | /* Alias for function name in GNU C Library. */ | |
141 | weak_alias (__textdomain, textdomain); | |
142 | #endif |