1 /* $NetBSD: textdomain.c,v 1.1.1.1 2016/01/14 00:11:28 christos Exp $ */
2
3 /* Implementation of the textdomain(3) function.
4 Copyright (C) 1995-1998, 2000-2003 Free Software Foundation, Inc.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Library General Public License as published
8 by the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public
17 License along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19 USA. */
20
21 #ifdef HAVE_CONFIG_H
22 # include <config.h>
23 #endif
24
25 #include <stdlib.h>
26 #include <string.h>
27
28 #ifdef _LIBC
29 # include <libintl.h>
30 #else
31 # include "libgnuintl.h"
32 #endif
33 #include "gettextP.h"
34
35 #ifdef _LIBC
36 /* We have to handle multi-threaded applications. */
37 # include <bits/libc-lock.h>
38 #else
39 /* Provide dummy implementation if this is outside glibc. */
40 # define __libc_rwlock_define(CLASS, NAME)
41 # define __libc_rwlock_wrlock(NAME)
42 # define __libc_rwlock_unlock(NAME)
43 #endif
44
45 /* The internal variables in the standalone libintl.a must have different
46 names than the internal variables in GNU libc, otherwise programs
47 using libintl.a cannot be linked statically. */
48 #if !defined _LIBC
49 # define _nl_default_default_domain libintl_nl_default_default_domain
50 # define _nl_current_default_domain libintl_nl_current_default_domain
51 #endif
52
53 /* @@ end of prolog @@ */
54
55 /* Name of the default text domain. */
56 extern const char _nl_default_default_domain[] attribute_hidden;
57
58 /* Default text domain in which entries for gettext(3) are to be found. */
59 extern const char *_nl_current_default_domain attribute_hidden;
60
61
62 /* Names for the libintl functions are a problem. They must not clash
63 with existing names and they should follow ANSI C. But this source
64 code is also used in GNU C Library where the names have a __
65 prefix. So we have to make a difference here. */
66 #ifdef _LIBC
67 # define TEXTDOMAIN __textdomain
68 # ifndef strdup
69 # define strdup(str) __strdup (str)
70 # endif
71 #else
72 # define TEXTDOMAIN libintl_textdomain
73 #endif
74
75 /* Lock variable to protect the global data in the gettext implementation. */
__libc_rwlock_define(extern,_nl_state_lock attribute_hidden)76 __libc_rwlock_define (extern, _nl_state_lock attribute_hidden)
77
78 /* Set the current default message catalog to DOMAINNAME.
79 If DOMAINNAME is null, return the current default.
80 If DOMAINNAME is "", reset to the default of "messages". */
81 char *
82 TEXTDOMAIN (const char *domainname)
83 {
84 char *new_domain;
85 char *old_domain;
86
87 /* A NULL pointer requests the current setting. */
88 if (domainname == NULL)
89 return (char *) _nl_current_default_domain;
90
91 __libc_rwlock_wrlock (_nl_state_lock);
92
93 old_domain = (char *) _nl_current_default_domain;
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)
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;
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. */
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
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);
133 }
134
135 __libc_rwlock_unlock (_nl_state_lock);
136
137 return new_domain;
138 }
139
140 #ifdef _LIBC
141 /* Alias for function name in GNU C Library. */
142 weak_alias (__textdomain, textdomain);
143 #endif
144