intl/finddomain.c

   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.  */
  42 static 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.  */
  48 struct loaded_l10nfile *
  49 internal_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
 178 libc_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