about summary refs log tree commit diff
path: root/intl/finddomain.c
blob: 6ef664eb1f5d233faf39a1096b73b659d4ecf9a2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/* Handle list of needed message catalogs
   Copyright (C) 1995-2015 Free Software Foundation, Inc.
   Written by Ulrich Drepper <drepper@gnu.org>, 1995.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>

#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
#endif

#include "gettextP.h"
#ifdef _LIBC
# include <libintl.h>
#else
# include "libgnuintl.h"
#endif

/* Handle multi-threaded applications.  */
#ifdef _LIBC
# include <libc-lock.h>
# define gl_rwlock_define_initialized __libc_rwlock_define_initialized
# define gl_rwlock_rdlock __libc_rwlock_rdlock
# define gl_rwlock_wrlock __libc_rwlock_wrlock
# define gl_rwlock_unlock __libc_rwlock_unlock
#else
# include "lock.h"
#endif

/* @@ end of prolog @@ */
/* List of already loaded domains.  */
static struct loaded_l10nfile *_nl_loaded_domains;


/* Return a data structure describing the message catalog described by
   the DOMAINNAME and CATEGORY parameters with respect to the currently
   established bindings.  */
struct loaded_l10nfile *
internal_function
_nl_find_domain (const char *dirname, char *locale,
		 const char *domainname, struct binding *domainbinding)
{
  struct loaded_l10nfile *retval;
  const char *language;
  const char *modifier;
  const char *territory;
  const char *codeset;
  const char *normalized_codeset;
  const char *alias_value;
  int mask;

  /* LOCALE can consist of up to four recognized parts for the XPG syntax:

		language[_territory][.codeset][@modifier]

     Beside the first part all of them are allowed to be missing.  If
     the full specified locale is not found, the less specific one are
     looked for.  The various parts will be stripped off according to
     the following order:
		(1) codeset
		(2) normalized codeset
		(3) territory
		(4) modifier
   */

  /* We need to protect modifying the _NL_LOADED_DOMAINS data.  */
  gl_rwlock_define_initialized (static, lock);
  gl_rwlock_rdlock (lock);

  /* If we have already tested for this locale entry there has to
     be one data set in the list of loaded domains.  */
  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
			       strlen (dirname) + 1, 0, locale, NULL, NULL,
			       NULL, NULL, domainname, 0);

  gl_rwlock_unlock (lock);

  if (retval != NULL)
    {
      /* We know something about this locale.  */
      int cnt;

      if (retval->decided <= 0)
	_nl_load_domain (retval, domainbinding);

      if (retval->data != NULL)
	return retval;

      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
	{
	  if (retval->successor[cnt]->decided <= 0)
	    _nl_load_domain (retval->successor[cnt], domainbinding);

	  if (retval->successor[cnt]->data != NULL)
	    break;
	}

      return retval;
      /* NOTREACHED */
    }

  /* See whether the locale value is an alias.  If yes its value
     *overwrites* the alias name.  No test for the original value is
     done.  */
  alias_value = _nl_expand_alias (locale);
  if (alias_value != NULL)
    {
#if defined _LIBC || defined HAVE_STRDUP
      locale = strdup (alias_value);
      if (locale == NULL)
	return NULL;
#else
      size_t len = strlen (alias_value) + 1;
      locale = (char *) malloc (len);
      if (locale == NULL)
	return NULL;

      memcpy (locale, alias_value, len);
#endif
    }

  /* Now we determine the single parts of the locale name.  First
     look for the language.  Termination symbols are `_', '.', and `@'.  */
  mask = _nl_explode_name (locale, &language, &modifier, &territory,
			   &codeset, &normalized_codeset);
  if (mask == -1)
    /* This means we are out of core.  */
    return NULL;

  /* We need to protect modifying the _NL_LOADED_DOMAINS data.  */
  gl_rwlock_wrlock (lock);

  /* Create all possible locale entries which might be interested in
     generalization.  */
  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
			       strlen (dirname) + 1, mask, language, territory,
			       codeset, normalized_codeset, modifier,
			       domainname, 1);

  gl_rwlock_unlock (lock);

  if (retval == NULL)
    /* This means we are out of core.  */
    goto out;

  if (retval->decided <= 0)
    _nl_load_domain (retval, domainbinding);
  if (retval->data == NULL)
    {
      int cnt;
      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
	{
	  if (retval->successor[cnt]->decided <= 0)
	    _nl_load_domain (retval->successor[cnt], domainbinding);
	  if (retval->successor[cnt]->data != NULL)
	    break;
	}
    }

  /* The room for an alias was dynamically allocated.  Free it now.  */
  if (alias_value != NULL)
    free (locale);

out:
  /* The space for normalized_codeset is dynamically allocated.  Free it.  */
  if (mask & XPG_NORM_CODESET)
    free ((void *) normalized_codeset);

  return retval;
}


#ifdef _LIBC
/* This is called from iconv/gconv_db.c's free_mem, as locales must
   be freed before freeing gconv steps arrays.  */
void __libc_freeres_fn_section
_nl_finddomain_subfreeres (void)
{
  struct loaded_l10nfile *runp = _nl_loaded_domains;

  while (runp != NULL)
    {
      struct loaded_l10nfile *here = runp;
      if (runp->data != NULL)
	_nl_unload_domain ((struct loaded_domain *) runp->data);
      runp = runp->next;
      free ((char *) here->filename);
      free (here);
    }
}
#endif