1/* Handle list of needed message catalogs
2   Copyright (C) 1995-1999, 2000-2001, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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 (const char *dirname, char *locale,
51		 const char *domainname, struct binding *domainbinding)
52{
53  struct loaded_l10nfile *retval;
54  const char *language;
55  const char *modifier;
56  const char *territory;
57  const char *codeset;
58  const char *normalized_codeset;
59  const char *special;
60  const char *sponsor;
61  const char *revision;
62  const char *alias_value;
63  int mask;
64
65  /* LOCALE can consist of up to four recognized parts for the XPG syntax:
66
67		language[_territory[.codeset]][@modifier]
68
69     and six parts for the CEN syntax:
70
71	language[_territory][+audience][+special][,[sponsor][_revision]]
72
73     Beside the first part all of them are allowed to be missing.  If
74     the full specified locale is not found, the less specific one are
75     looked for.  The various parts will be stripped off according to
76     the following order:
77		(1) revision
78		(2) sponsor
79		(3) special
80		(4) codeset
81		(5) normalized codeset
82		(6) territory
83		(7) audience/modifier
84   */
85
86  /* If we have already tested for this locale entry there has to
87     be one data set in the list of loaded domains.  */
88  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
89			       strlen (dirname) + 1, 0, locale, NULL, NULL,
90			       NULL, NULL, NULL, NULL, NULL, domainname, 0);
91  if (retval != NULL)
92    {
93      /* We know something about this locale.  */
94      int cnt;
95
96      if (retval->decided == 0)
97	_nl_load_domain (retval, domainbinding);
98
99      if (retval->data != NULL)
100	return retval;
101
102      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
103	{
104	  if (retval->successor[cnt]->decided == 0)
105	    _nl_load_domain (retval->successor[cnt], domainbinding);
106
107	  if (retval->successor[cnt]->data != NULL)
108	    break;
109	}
110      return cnt >= 0 ? retval : NULL;
111      /* NOTREACHED */
112    }
113
114  /* See whether the locale value is an alias.  If yes its value
115     *overwrites* the alias name.  No test for the original value is
116     done.  */
117  alias_value = _nl_expand_alias (locale);
118  if (alias_value != NULL)
119    {
120#if defined _LIBC || defined HAVE_STRDUP
121      locale = strdup (alias_value);
122      if (locale == NULL)
123	return NULL;
124#else
125      size_t len = strlen (alias_value) + 1;
126      locale = (char *) malloc (len);
127      if (locale == NULL)
128	return NULL;
129
130      memcpy (locale, alias_value, len);
131#endif
132    }
133
134  /* Now we determine the single parts of the locale name.  First
135     look for the language.  Termination symbols are `_' and `@' if
136     we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
137  mask = _nl_explode_name (locale, &language, &modifier, &territory,
138			   &codeset, &normalized_codeset, &special,
139			   &sponsor, &revision);
140
141  /* Create all possible locale entries which might be interested in
142     generalization.  */
143  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
144			       strlen (dirname) + 1, mask, language, territory,
145			       codeset, normalized_codeset, modifier, special,
146			       sponsor, revision, domainname, 1);
147  if (retval == NULL)
148    /* This means we are out of core.  */
149    return NULL;
150
151  if (retval->decided == 0)
152    _nl_load_domain (retval, domainbinding);
153  if (retval->data == NULL)
154    {
155      int cnt;
156      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
157	{
158	  if (retval->successor[cnt]->decided == 0)
159	    _nl_load_domain (retval->successor[cnt], domainbinding);
160	  if (retval->successor[cnt]->data != NULL)
161	    break;
162	}
163    }
164
165  /* The room for an alias was dynamically allocated.  Free it now.  */
166  if (alias_value != NULL)
167    free (locale);
168
169  /* The space for normalized_codeset is dynamically allocated.  Free it.  */
170  if (mask & XPG_NORM_CODESET)
171    free ((void *) normalized_codeset);
172
173  return retval;
174}
175
176
177#ifdef _LIBC
178libc_freeres_fn (free_mem)
179{
180  struct loaded_l10nfile *runp = _nl_loaded_domains;
181
182  while (runp != NULL)
183    {
184      struct loaded_l10nfile *here = runp;
185      if (runp->data != NULL)
186	_nl_unload_domain ((struct loaded_domain *) runp->data);
187      runp = runp->next;
188      free ((char *) here->filename);
189      free (here);
190    }
191}
192#endif
193