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1 | /* Handle list of needed message catalogs | |
2 | Copyright (C) 1995-2024 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. */ | |
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 | _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 | ||
176 | out: | |
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. */ | |
188 | void | |
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 |