intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995-1999, 2000, 2001, 2002, 2004
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 # include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <sys/types.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if defined HAVE_UNISTD_H || defined _LIBC
  32 # include <unistd.h>
  33 #endif
  34
  35 #include "gettextP.h"
  36 #ifdef _LIBC
  37 # include <libintl.h>
  38 #else
  39 # include "libgnuintl.h"
  40 #endif
  41
  42 /* @@ end of prolog @@ */
  43 /* List of already loaded domains.  */
  44 static struct loaded_l10nfile *_nl_loaded_domains;
  45
  46
  47 /* Return a data structure describing the message catalog described by
  48    the DOMAINNAME and CATEGORY parameters with respect to the currently
  49    established bindings.  */
  50 struct loaded_l10nfile *
  51 internal_function
  52 _nl_find_domain (dirname, locale, domainname, domainbinding)
  53      const char *dirname;
  54      char *locale;
  55      const char *domainname;
  56      struct binding *domainbinding;
  57 {
  58   struct loaded_l10nfile *retval;
  59   const char *language;
  60   const char *modifier;
  61   const char *territory;
  62   const char *codeset;
  63   const char *normalized_codeset;
  64   const char *alias_value;
  65   int mask;
  66
  67   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  68
  69                 language[_territory[.codeset]][@modifier]
  70
  71      Beside the first part all of them are allowed to be missing.  If
  72      the full specified locale is not found, the less specific one are
  73      looked for.  The various parts will be stripped off according to
  74      the following order:
  75                 (1) codeset
  76                 (2) normalized codeset
  77                 (3) territory
  78                 (4) modifier
  79    */
  80
  81   /* If we have already tested for this locale entry there has to
  82      be one data set in the list of loaded domains.  */
  83   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  84                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  85                                NULL, NULL, domainname, 0);
  86   if (retval != NULL)
  87     {
  88       /* We know something about this locale.  */
  89       int cnt;
  90
  91       if (retval->decided == 0)
  92         _nl_load_domain (retval, domainbinding);
  93
  94       if (retval->data != NULL)
  95         return retval;
  96
  97       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
  98         {
  99           if (retval->successor[cnt]->decided == 0)
 100             _nl_load_domain (retval->successor[cnt], domainbinding);
 101
 102           if (retval->successor[cnt]->data != NULL)
 103             break;
 104         }
 105       return cnt >= 0 ? retval : NULL;
 106       /* NOTREACHED */
 107     }
 108
 109   /* See whether the locale value is an alias.  If yes its value
 110      *overwrites* the alias name.  No test for the original value is
 111      done.  */
 112   alias_value = _nl_expand_alias (locale);
 113   if (alias_value != NULL)
 114     {
 115 #if defined _LIBC || defined HAVE_STRDUP
 116       locale = strdup (alias_value);
 117       if (locale == NULL)
 118         return NULL;
 119 #else
 120       size_t len = strlen (alias_value) + 1;
 121       locale = (char *) malloc (len);
 122       if (locale == NULL)
 123         return NULL;
 124
 125       memcpy (locale, alias_value, len);
 126 #endif
 127     }
 128
 129   /* Now we determine the single parts of the locale name.  First
 130      look for the language.  Termination symbols are `_' and `@' if
 131      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 132   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 133                            &codeset, &normalized_codeset);
 134
 135   /* Create all possible locale entries which might be interested in
 136      generalization.  */
 137   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 138                                strlen (dirname) + 1, mask, language, territory,
 139                                codeset, normalized_codeset, modifier,
 140                                domainname, 1);
 141   if (retval == NULL)
 142     /* This means we are out of core.  */
 143     return NULL;
 144
 145   if (retval->decided == 0)
 146     _nl_load_domain (retval, domainbinding);
 147   if (retval->data == NULL)
 148     {
 149       int cnt;
 150       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 151         {
 152           if (retval->successor[cnt]->decided == 0)
 153             _nl_load_domain (retval->successor[cnt], domainbinding);
 154           if (retval->successor[cnt]->data != NULL)
 155             break;
 156         }
 157     }
 158
 159   /* The room for an alias was dynamically allocated.  Free it now.  */
 160   if (alias_value != NULL)
 161     free (locale);
 162
 163   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 164   if (mask & XPG_NORM_CODESET)
 165     free ((void *) normalized_codeset);
 166
 167   return retval;
 168 }
 169
 170
 171 #ifdef _LIBC
 172 /* This is called from iconv/gconv_db.c's free_mem, as locales must
 173    be freed before freeing gconv steps arrays.  */
 174 void __libc_freeres_fn_section
 175 _nl_finddomain_subfreeres ()
 176 {
 177   struct loaded_l10nfile *runp = _nl_loaded_domains;
 178
 179   while (runp != NULL)
 180     {
 181       struct loaded_l10nfile *here = runp;
 182       if (runp->data != NULL)
 183         _nl_unload_domain ((struct loaded_domain *) runp->data);
 184       runp = runp->next;
 185       free ((char *) here->filename);
 186       free (here);
 187     }
 188 }
 189 #endif