1/* Handle list of needed message catalogs
2   Copyright (C) 1995-1999, 2000, 2001 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/* @@ end of prolog @@ */
41/* List of already loaded domains.  */
42static struct loaded_l10nfile *_nl_loaded_domains;
43
44
45/* Return a data structure describing the message catalog described by
46   the DOMAINNAME and CATEGORY parameters with respect to the currently
47   established bindings.  */
48struct loaded_l10nfile *
49internal_function
50_nl_find_domain (dirname, locale, domainname, domainbinding)
51     const char *dirname;
52     char *locale;
53     const char *domainname;
54     struct binding *domainbinding;
55{
56  struct loaded_l10nfile *retval;
57  const char *language;
58  const char *modifier;
59  const char *territory;
60  const char *codeset;
61  const char *normalized_codeset;
62  const char *special;
63  const char *sponsor;
64  const char *revision;
65  const char *alias_value;
66  int mask;
67
68  /* LOCALE can consist of up to four recognized parts for the XPG syntax:
69
70		language[_territory[.codeset]][@modifier]
71
72     and six parts for the CEN syntax:
73
74	language[_territory][+audience][+special][,[sponsor][_revision]]
75
76     Beside the first part all of them are allowed to be missing.  If
77     the full specified locale is not found, the less specific one are
78     looked for.  The various parts will be stripped off according to
79     the following order:
80		(1) revision
81		(2) sponsor
82		(3) special
83		(4) codeset
84		(5) normalized codeset
85		(6) territory
86		(7) audience/modifier
87   */
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, NULL, NULL, NULL, domainname, 0);
94  if (retval != NULL)
95    {
96      /* We know something about this locale.  */
97      int cnt;
98
99      if (retval->decided == 0)
100	_nl_load_domain (retval, domainbinding);
101
102      if (retval->data != NULL)
103	return retval;
104
105      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
106	{
107	  if (retval->successor[cnt]->decided == 0)
108	    _nl_load_domain (retval->successor[cnt], domainbinding);
109
110	  if (retval->successor[cnt]->data != NULL)
111	    break;
112	}
113      return cnt >= 0 ? retval : NULL;
114      /* NOTREACHED */
115    }
116
117  /* See whether the locale value is an alias.  If yes its value
118     *overwrites* the alias name.  No test for the original value is
119     done.  */
120  alias_value = _nl_expand_alias (locale);
121  if (alias_value != NULL)
122    {
123#if defined _LIBC || defined HAVE_STRDUP
124      locale = strdup (alias_value);
125      if (locale == NULL)
126	return NULL;
127#else
128      size_t len = strlen (alias_value) + 1;
129      locale = (char *) malloc (len);
130      if (locale == NULL)
131	return NULL;
132
133      memcpy (locale, alias_value, len);
134#endif
135    }
136
137  /* Now we determine the single parts of the locale name.  First
138     look for the language.  Termination symbols are `_' and `@' if
139     we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
140  mask = _nl_explode_name (locale, &language, &modifier, &territory,
141			   &codeset, &normalized_codeset, &special,
142			   &sponsor, &revision);
143
144  /* Create all possible locale entries which might be interested in
145     generalization.  */
146  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
147			       strlen (dirname) + 1, mask, language, territory,
148			       codeset, normalized_codeset, modifier, special,
149			       sponsor, revision, domainname, 1);
150  if (retval == NULL)
151    /* This means we are out of core.  */
152    return NULL;
153
154  if (retval->decided == 0)
155    _nl_load_domain (retval, domainbinding);
156  if (retval->data == NULL)
157    {
158      int cnt;
159      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
160	{
161	  if (retval->successor[cnt]->decided == 0)
162	    _nl_load_domain (retval->successor[cnt], domainbinding);
163	  if (retval->successor[cnt]->data != NULL)
164	    break;
165	}
166    }
167
168  /* The room for an alias was dynamically allocated.  Free it now.  */
169  if (alias_value != NULL)
170    free (locale);
171
172  /* The space for normalized_codeset is dynamically allocated.  Free it.  */
173  if (mask & XPG_NORM_CODESET)
174    free ((void *) normalized_codeset);
175
176  return retval;
177}
178
179
180#ifdef _LIBC
181libc_freeres_fn (free_mem)
182{
183  struct loaded_l10nfile *runp = _nl_loaded_domains;
184
185  while (runp != NULL)
186    {
187      struct loaded_l10nfile *here = runp;
188      if (runp->data != NULL)
189	_nl_unload_domain ((struct loaded_domain *) runp->data);
190      runp = runp->next;
191      free ((char *) here->filename);
192      free (here);
193    }
194}
195#endif
196