1/* Handle list of needed message catalogs
2 Copyright (C) 1995-2020 Free Software Foundation, Inc.
3 Written by Ulrich Drepper <drepper@gnu.org>, 1995.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9
10 This program 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
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18#ifdef HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22#include <stdio.h>
23#include <sys/types.h>
24#include <stdlib.h>
25#include <string.h>
26
27#if defined HAVE_UNISTD_H || defined _LIBC
28# include <unistd.h>
29#endif
30
31#include "gettextP.h"
32#ifdef _LIBC
33# include <libintl.h>
34#else
35# include "libgnuintl.h"
36#endif
37
38/* Handle multi-threaded applications. */
39#ifdef _LIBC
40# include <libc-lock.h>
41# define gl_rwlock_define_initialized __libc_rwlock_define_initialized
42# define gl_rwlock_rdlock __libc_rwlock_rdlock
43# define gl_rwlock_wrlock __libc_rwlock_wrlock
44# define gl_rwlock_unlock __libc_rwlock_unlock
45#else
46# include "lock.h"
47#endif
48
49/* @@ end of prolog @@ */
50/* List of already loaded domains. */
51static struct loaded_l10nfile *_nl_loaded_domains;
52
53
54/* Return a data structure describing the message catalog described by
55 the DOMAINNAME and CATEGORY parameters with respect to the currently
56 established bindings. */
57struct loaded_l10nfile *
58_nl_find_domain (const char *dirname, char *locale,
59 const char *domainname, struct binding *domainbinding)
60{
61 struct loaded_l10nfile *retval;
62 const char *language;
63 const char *modifier;
64 const char *territory;
65 const char *codeset;
66 const char *normalized_codeset;
67 const char *alias_value;
68 int mask;
69
70 /* LOCALE can consist of up to four recognized parts for the XPG syntax:
71
72 language[_territory][.codeset][@modifier]
73
74 Beside the first part all of them are allowed to be missing. If
75 the full specified locale is not found, the less specific one are
76 looked for. The various parts will be stripped off according to
77 the following order:
78 (1) codeset
79 (2) normalized codeset
80 (3) territory
81 (4) modifier
82 */
83
84 /* We need to protect modifying the _NL_LOADED_DOMAINS data. */
85 gl_rwlock_define_initialized (static, lock);
86 gl_rwlock_rdlock (lock);
87
88 /* If we have already tested for this locale entry there has to
89 be one data set in the list of loaded domains. */
90 retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
91 strlen (dirname) + 1, 0, locale, NULL, NULL,
92 NULL, NULL, domainname, 0);
93
94 gl_rwlock_unlock (lock);
95
96 if (retval != NULL)
97 {
98 /* We know something about this locale. */
99 int cnt;
100
101 if (retval->decided <= 0)
102 _nl_load_domain (retval, domainbinding);
103
104 if (retval->data != NULL)
105 return retval;
106
107 for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
108 {
109 if (retval->successor[cnt]->decided <= 0)
110 _nl_load_domain (retval->successor[cnt], domainbinding);
111
112 if (retval->successor[cnt]->data != NULL)
113 break;
114 }
115
116 return retval;
117 /* NOTREACHED */
118 }
119
120 /* See whether the locale value is an alias. If yes its value
121 *overwrites* the alias name. No test for the original value is
122 done. */
123 alias_value = _nl_expand_alias (locale);
124 if (alias_value != NULL)
125 {
126 size_t len = strlen (alias_value) + 1;
127 locale = (char *) malloc (len);
128 if (locale == NULL)
129 return NULL;
130
131 memcpy (locale, alias_value, len);
132 }
133
134 /* Now we determine the single parts of the locale name. First
135 look for the language. Termination symbols are `_', '.', and `@'. */
136 mask = _nl_explode_name (locale, &language, &modifier, &territory,
137 &codeset, &normalized_codeset);
138 if (mask == -1)
139 /* This means we are out of core. */
140 return NULL;
141
142 /* We need to protect modifying the _NL_LOADED_DOMAINS data. */
143 gl_rwlock_wrlock (lock);
144
145 /* Create all possible locale entries which might be interested in
146 generalization. */
147 retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
148 strlen (dirname) + 1, mask, language, territory,
149 codeset, normalized_codeset, modifier,
150 domainname, 1);
151
152 gl_rwlock_unlock (lock);
153
154 if (retval == NULL)
155 /* This means we are out of core. */
156 goto out;
157
158 if (retval->decided <= 0)
159 _nl_load_domain (retval, domainbinding);
160 if (retval->data == NULL)
161 {
162 int cnt;
163 for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
164 {
165 if (retval->successor[cnt]->decided <= 0)
166 _nl_load_domain (retval->successor[cnt], domainbinding);
167 if (retval->successor[cnt]->data != NULL)
168 break;
169 }
170 }
171
172 /* The room for an alias was dynamically allocated. Free it now. */
173 if (alias_value != NULL)
174 free (locale);
175
176out:
177 /* The space for normalized_codeset is dynamically allocated. Free it. */
178 if (mask & XPG_NORM_CODESET)
179 free ((void *) normalized_codeset);
180
181 return retval;
182}
183
184
185#ifdef _LIBC
186/* This is called from iconv/gconv_db.c's free_mem, as locales must
187 be freed before freeing gconv steps arrays. */
188void __libc_freeres_fn_section
189_nl_finddomain_subfreeres (void)
190{
191 struct loaded_l10nfile *runp = _nl_loaded_domains;
192
193 while (runp != NULL)
194 {
195 struct loaded_l10nfile *here = runp;
196 if (runp->data != NULL)
197 _nl_unload_domain ((struct loaded_domain *) runp->data);
198 runp = runp->next;
199 free ((char *) here->filename);
200 free (here);
201 }
202}
203#endif
204