1 | /* Handle list of needed message catalogs |
2 | Copyright (C) 1995-2017 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 <http://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. */ |
51 | static 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. */ |
57 | struct loaded_l10nfile * |
58 | internal_function |
59 | _nl_find_domain (const char *dirname, char *locale, |
60 | const char *domainname, struct binding *domainbinding) |
61 | { |
62 | struct loaded_l10nfile *retval; |
63 | const char *language; |
64 | const char *modifier; |
65 | const char *territory; |
66 | const char *codeset; |
67 | const char *normalized_codeset; |
68 | const char *alias_value; |
69 | int mask; |
70 | |
71 | /* LOCALE can consist of up to four recognized parts for the XPG syntax: |
72 | |
73 | language[_territory][.codeset][@modifier] |
74 | |
75 | Beside the first part all of them are allowed to be missing. If |
76 | the full specified locale is not found, the less specific one are |
77 | looked for. The various parts will be stripped off according to |
78 | the following order: |
79 | (1) codeset |
80 | (2) normalized codeset |
81 | (3) territory |
82 | (4) modifier |
83 | */ |
84 | |
85 | /* We need to protect modifying the _NL_LOADED_DOMAINS data. */ |
86 | gl_rwlock_define_initialized (static, lock); |
87 | gl_rwlock_rdlock (lock); |
88 | |
89 | /* If we have already tested for this locale entry there has to |
90 | be one data set in the list of loaded domains. */ |
91 | retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname, |
92 | strlen (dirname) + 1, 0, locale, NULL, NULL, |
93 | NULL, NULL, domainname, 0); |
94 | |
95 | gl_rwlock_unlock (lock); |
96 | |
97 | if (retval != NULL) |
98 | { |
99 | /* We know something about this locale. */ |
100 | int cnt; |
101 | |
102 | if (retval->decided <= 0) |
103 | _nl_load_domain (retval, domainbinding); |
104 | |
105 | if (retval->data != NULL) |
106 | return retval; |
107 | |
108 | for (cnt = 0; retval->successor[cnt] != NULL; ++cnt) |
109 | { |
110 | if (retval->successor[cnt]->decided <= 0) |
111 | _nl_load_domain (retval->successor[cnt], domainbinding); |
112 | |
113 | if (retval->successor[cnt]->data != NULL) |
114 | break; |
115 | } |
116 | |
117 | return retval; |
118 | /* NOTREACHED */ |
119 | } |
120 | |
121 | /* See whether the locale value is an alias. If yes its value |
122 | *overwrites* the alias name. No test for the original value is |
123 | done. */ |
124 | alias_value = _nl_expand_alias (locale); |
125 | if (alias_value != NULL) |
126 | { |
127 | #if defined _LIBC || defined HAVE_STRDUP |
128 | locale = strdup (alias_value); |
129 | if (locale == NULL) |
130 | return NULL; |
131 | #else |
132 | size_t len = strlen (alias_value) + 1; |
133 | locale = (char *) malloc (len); |
134 | if (locale == NULL) |
135 | return NULL; |
136 | |
137 | memcpy (locale, alias_value, len); |
138 | #endif |
139 | } |
140 | |
141 | /* Now we determine the single parts of the locale name. First |
142 | look for the language. Termination symbols are `_', '.', and `@'. */ |
143 | mask = _nl_explode_name (locale, &language, &modifier, &territory, |
144 | &codeset, &normalized_codeset); |
145 | if (mask == -1) |
146 | /* This means we are out of core. */ |
147 | return NULL; |
148 | |
149 | /* We need to protect modifying the _NL_LOADED_DOMAINS data. */ |
150 | gl_rwlock_wrlock (lock); |
151 | |
152 | /* Create all possible locale entries which might be interested in |
153 | generalization. */ |
154 | retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname, |
155 | strlen (dirname) + 1, mask, language, territory, |
156 | codeset, normalized_codeset, modifier, |
157 | domainname, 1); |
158 | |
159 | gl_rwlock_unlock (lock); |
160 | |
161 | if (retval == NULL) |
162 | /* This means we are out of core. */ |
163 | goto out; |
164 | |
165 | if (retval->decided <= 0) |
166 | _nl_load_domain (retval, domainbinding); |
167 | if (retval->data == NULL) |
168 | { |
169 | int cnt; |
170 | for (cnt = 0; retval->successor[cnt] != NULL; ++cnt) |
171 | { |
172 | if (retval->successor[cnt]->decided <= 0) |
173 | _nl_load_domain (retval->successor[cnt], domainbinding); |
174 | if (retval->successor[cnt]->data != NULL) |
175 | break; |
176 | } |
177 | } |
178 | |
179 | /* The room for an alias was dynamically allocated. Free it now. */ |
180 | if (alias_value != NULL) |
181 | free (locale); |
182 | |
183 | out: |
184 | /* The space for normalized_codeset is dynamically allocated. Free it. */ |
185 | if (mask & XPG_NORM_CODESET) |
186 | free ((void *) normalized_codeset); |
187 | |
188 | return retval; |
189 | } |
190 | |
191 | |
192 | #ifdef _LIBC |
193 | /* This is called from iconv/gconv_db.c's free_mem, as locales must |
194 | be freed before freeing gconv steps arrays. */ |
195 | void __libc_freeres_fn_section |
196 | _nl_finddomain_subfreeres (void) |
197 | { |
198 | struct loaded_l10nfile *runp = _nl_loaded_domains; |
199 | |
200 | while (runp != NULL) |
201 | { |
202 | struct loaded_l10nfile *here = runp; |
203 | if (runp->data != NULL) |
204 | _nl_unload_domain ((struct loaded_domain *) runp->data); |
205 | runp = runp->next; |
206 | free ((char *) here->filename); |
207 | free (here); |
208 | } |
209 | } |
210 | #endif |
211 | |