1 /* Handle list of needed message catalogs
2    Copyright (C) 1995-1999, 2000-2001, 2003-2006 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 it
6    under the terms of the GNU Library General Public License as published
7    by the Free Software Foundation; either version 2, or (at your option)
8    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 GNU
13    Library General Public License for more details.
14 
15    You should have received a copy of the GNU Library General Public
16    License along with this program; if not, write to the Free Software
17    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
18    USA.  */
19 
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23 
24 #include <stdio.h>
25 #include <sys/types.h>
26 #include <stdlib.h>
27 #include <string.h>
28 
29 #if defined HAVE_UNISTD_H || defined _LIBC
30 # include <unistd.h>
31 #endif
32 
33 #include "gettextP.h"
34 #ifdef _LIBC
35 # include <libintl.h>
36 #else
37 # include "libgnuintl.h"
38 #endif
39 
40 /* Handle multi-threaded applications.  */
41 #ifdef _LIBC
42 # include <bits/libc-lock.h>
43 # define gl_rwlock_define_initialized __libc_rwlock_define_initialized
44 # define gl_rwlock_rdlock __libc_rwlock_rdlock
45 # define gl_rwlock_wrlock __libc_rwlock_wrlock
46 # define gl_rwlock_unlock __libc_rwlock_unlock
47 #else
48 # include "lock.h"
49 #endif
50 
51 /* @@ end of prolog @@ */
52 /* List of already loaded domains.  */
53 static struct loaded_l10nfile *_nl_loaded_domains;
54 
55 
56 /* Return a data structure describing the message catalog described by
57    the DOMAINNAME and CATEGORY parameters with respect to the currently
58    established bindings.  */
59 struct loaded_l10nfile *
60 internal_function
_nl_find_domain(const char * dirname,char * locale,const char * domainname,struct binding * domainbinding)61 _nl_find_domain (const char *dirname, char *locale,
62 		 const char *domainname, struct binding *domainbinding)
63 {
64   struct loaded_l10nfile *retval;
65   const char *language;
66   const char *modifier;
67   const char *territory;
68   const char *codeset;
69   const char *normalized_codeset;
70   const char *alias_value;
71   int mask;
72 
73   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
74 
75 		language[_territory][.codeset][@modifier]
76 
77      Beside the first part all of them are allowed to be missing.  If
78      the full specified locale is not found, the less specific one are
79      looked for.  The various parts will be stripped off according to
80      the following order:
81 		(1) codeset
82 		(2) normalized codeset
83 		(3) territory
84 		(4) modifier
85    */
86 
87   /* We need to protect modifying the _NL_LOADED_DOMAINS data.  */
88   gl_rwlock_define_initialized (static, lock);
89   gl_rwlock_rdlock (lock);
90 
91   /* If we have already tested for this locale entry there has to
92      be one data set in the list of loaded domains.  */
93   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
94 			       strlen (dirname) + 1, 0, locale, NULL, NULL,
95 			       NULL, NULL, domainname, 0);
96 
97   gl_rwlock_unlock (lock);
98 
99   if (retval != NULL)
100     {
101       /* We know something about this locale.  */
102       int cnt;
103 
104       if (retval->decided <= 0)
105 	_nl_load_domain (retval, domainbinding);
106 
107       if (retval->data != NULL)
108 	return retval;
109 
110       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
111 	{
112 	  if (retval->successor[cnt]->decided <= 0)
113 	    _nl_load_domain (retval->successor[cnt], domainbinding);
114 
115 	  if (retval->successor[cnt]->data != NULL)
116 	    break;
117 	}
118 
119       return retval;
120       /* NOTREACHED */
121     }
122 
123   /* See whether the locale value is an alias.  If yes its value
124      *overwrites* the alias name.  No test for the original value is
125      done.  */
126   alias_value = _nl_expand_alias (locale);
127   if (alias_value != NULL)
128     {
129 #if defined _LIBC || defined HAVE_STRDUP
130       locale = strdup (alias_value);
131       if (locale == NULL)
132 	return NULL;
133 #else
134       size_t len = strlen (alias_value) + 1;
135       locale = (char *) malloc (len);
136       if (locale == NULL)
137 	return NULL;
138 
139       memcpy (locale, alias_value, len);
140 #endif
141     }
142 
143   /* Now we determine the single parts of the locale name.  First
144      look for the language.  Termination symbols are `_', '.', and `@'.  */
145   mask = _nl_explode_name (locale, &language, &modifier, &territory,
146 			   &codeset, &normalized_codeset);
147 
148   /* We need to protect modifying the _NL_LOADED_DOMAINS data.  */
149   gl_rwlock_wrlock (lock);
150 
151   /* Create all possible locale entries which might be interested in
152      generalization.  */
153   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
154 			       strlen (dirname) + 1, mask, language, territory,
155 			       codeset, normalized_codeset, modifier,
156 			       domainname, 1);
157 
158   gl_rwlock_unlock (lock);
159 
160   if (retval == NULL)
161     /* This means we are out of core.  */
162     return NULL;
163 
164   if (retval->decided <= 0)
165     _nl_load_domain (retval, domainbinding);
166   if (retval->data == NULL)
167     {
168       int cnt;
169       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
170 	{
171 	  if (retval->successor[cnt]->decided <= 0)
172 	    _nl_load_domain (retval->successor[cnt], domainbinding);
173 	  if (retval->successor[cnt]->data != NULL)
174 	    break;
175 	}
176     }
177 
178   /* The room for an alias was dynamically allocated.  Free it now.  */
179   if (alias_value != NULL)
180     free (locale);
181 
182   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
183   if (mask & XPG_NORM_CODESET)
184     free ((void *) normalized_codeset);
185 
186   return retval;
187 }
188 
189 
190 #ifdef _LIBC
191 /* This is called from iconv/gconv_db.c's free_mem, as locales must
192    be freed before freeing gconv steps arrays.  */
193 void __libc_freeres_fn_section
_nl_finddomain_subfreeres()194 _nl_finddomain_subfreeres ()
195 {
196   struct loaded_l10nfile *runp = _nl_loaded_domains;
197 
198   while (runp != NULL)
199     {
200       struct loaded_l10nfile *here = runp;
201       if (runp->data != NULL)
202 	_nl_unload_domain ((struct loaded_domain *) runp->data);
203       runp = runp->next;
204       free ((char *) here->filename);
205       free (here);
206     }
207 }
208 #endif
209