intl/finddomain.c

   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
   6    it under the terms of the GNU General Public License as published by
   7    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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 #include <stdio.h>
  24 #include <sys/types.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #if defined HAVE_UNISTD_H || defined _LIBC
  29 # include <unistd.h>
  30 #endif
  31
  32 #include "gettextP.h"
  33 #ifdef _LIBC
  34 # include <libintl.h>
  35 #else
  36 # include "libgnuintl.h"
  37 #endif
  38
  39 /* @@ end of prolog @@ */
  40 /* List of already loaded domains.  */
  41 static struct loaded_l10nfile *_nl_loaded_domains;
  42
  43
  44 /* Return a data structure describing the message catalog described by
  45    the DOMAINNAME and CATEGORY parameters with respect to the currently
  46    established bindings.  */
  47 struct loaded_l10nfile *
  48 internal_function
  49 _nl_find_domain (dirname, locale, domainname, domainbinding)
  50      const char *dirname;
  51      char *locale;
  52      const char *domainname;
  53      struct binding *domainbinding;
  54 {
  55   struct loaded_l10nfile *retval;
  56   const char *language;
  57   const char *modifier;
  58   const char *territory;
  59   const char *codeset;
  60   const char *normalized_codeset;
  61   const char *special;
  62   const char *sponsor;
  63   const char *revision;
  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      and six parts for the CEN syntax:
  72
  73         language[_territory][+audience][+special][,[sponsor][_revision]]
  74
  75      Beside the first part all of them are allowed to be missing.  If
  76      the full specified locale is not found, the less specific one are
  77      looked for.  The various parts will be stripped off according to
  78      the following order:
  79                 (1) revision
  80                 (2) sponsor
  81                 (3) special
  82                 (4) codeset
  83                 (5) normalized codeset
  84                 (6) territory
  85                 (7) audience/modifier
  86    */
  87
  88   /* If we have already tested for this locale entry there has to
  89      be one data set in the list of loaded domains.  */
  90   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  91                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  92                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
  93   if (retval != NULL)
  94     {
  95       /* We know something about this locale.  */
  96       int cnt;
  97
  98       if (retval->decided == 0)
  99         _nl_load_domain (retval, domainbinding);
 100
 101       if (retval->data != NULL)
 102         return retval;
 103
 104       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 105         {
 106           if (retval->successor[cnt]->decided == 0)
 107             _nl_load_domain (retval->successor[cnt], domainbinding);
 108
 109           if (retval->successor[cnt]->data != NULL)
 110             break;
 111         }
 112       return cnt >= 0 ? retval : NULL;
 113       /* NOTREACHED */
 114     }
 115
 116   /* See whether the locale value is an alias.  If yes its value
 117      *overwrites* the alias name.  No test for the original value is
 118      done.  */
 119   alias_value = _nl_expand_alias (locale);
 120   if (alias_value != NULL)
 121     {
 122 #if defined _LIBC || defined HAVE_STRDUP
 123       locale = strdup (alias_value);
 124       if (locale == NULL)
 125         return NULL;
 126 #else
 127       size_t len = strlen (alias_value) + 1;
 128       locale = (char *) malloc (len);
 129       if (locale == NULL)
 130         return NULL;
 131
 132       memcpy (locale, alias_value, len);
 133 #endif
 134     }
 135
 136   /* Now we determine the single parts of the locale name.  First
 137      look for the language.  Termination symbols are `_' and `@' if
 138      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 139   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 140                            &codeset, &normalized_codeset, &special,
 141                            &sponsor, &revision);
 142
 143   /* Create all possible locale entries which might be interested in
 144      generalization.  */
 145   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 146                                strlen (dirname) + 1, mask, language, territory,
 147                                codeset, normalized_codeset, modifier, special,
 148                                sponsor, revision, domainname, 1);
 149   if (retval == NULL)
 150     /* This means we are out of core.  */
 151     return NULL;
 152
 153   if (retval->decided == 0)
 154     _nl_load_domain (retval, domainbinding);
 155   if (retval->data == NULL)
 156     {
 157       int cnt;
 158       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 159         {
 160           if (retval->successor[cnt]->decided == 0)
 161             _nl_load_domain (retval->successor[cnt], domainbinding);
 162           if (retval->successor[cnt]->data != NULL)
 163             break;
 164         }
 165     }
 166
 167   /* The room for an alias was dynamically allocated.  Free it now.  */
 168   if (alias_value != NULL)
 169     free (locale);
 170
 171   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 172   if (mask & XPG_NORM_CODESET)
 173     free ((void *) normalized_codeset);
 174
 175   return retval;
 176 }
 177
 178
 179 #ifdef _LIBC
 180 static void __attribute__ ((unused))
 181 free_mem (void)
 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
 196 text_set_element (__libc_subfreeres, free_mem);
 197 #endif