intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <sys/types.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #if defined HAVE_UNISTD_H || defined _LIBC
  31 # include <unistd.h>
  32 #endif
  33
  34 #include "gettextP.h"
  35 #ifdef _LIBC
  36 # include <libintl.h>
  37 #else
  38 # include "libgnuintl.h"
  39 #endif
  40
  41 /* @@ end of prolog @@ */
  42 /* List of already loaded domains.  */
  43 static struct loaded_l10nfile *_nl_loaded_domains;
  44
  45
  46 /* Return a data structure describing the message catalog described by
  47    the DOMAINNAME and CATEGORY parameters with respect to the currently
  48    established bindings.  */
  49 struct loaded_l10nfile *
  50 internal_function
  51 _nl_find_domain (dirname, locale, domainname, domainbinding)
  52      const char *dirname;
  53      char *locale;
  54      const char *domainname;
  55      struct binding *domainbinding;
  56 {
  57   struct loaded_l10nfile *retval;
  58   const char *language;
  59   const char *modifier;
  60   const char *territory;
  61   const char *codeset;
  62   const char *normalized_codeset;
  63   const char *special;
  64   const char *sponsor;
  65   const char *revision;
  66   const char *alias_value;
  67   int mask;
  68
  69   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  70
  71                 language[_territory[.codeset]][@modifier]
  72
  73      and six parts for the CEN syntax:
  74
  75         language[_territory][+audience][+special][,[sponsor][_revision]]
  76
  77      Beside the first part all of them are allowed to be missing.  If
  78      the full specified locale is not found, the less specific one are
  79      looked for.  The various parts will be stripped off according to
  80      the following order:
  81                 (1) revision
  82                 (2) sponsor
  83                 (3) special
  84                 (4) codeset
  85                 (5) normalized codeset
  86                 (6) territory
  87                 (7) audience/modifier
  88    */
  89
  90   /* If we have already tested for this locale entry there has to
  91      be one data set in the list of loaded domains.  */
  92   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  93                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  94                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
  95   if (retval != NULL)
  96     {
  97       /* We know something about this locale.  */
  98       int cnt;
  99
 100       if (retval->decided == 0)
 101         _nl_load_domain (retval, domainbinding);
 102
 103       if (retval->data != NULL)
 104         return retval;
 105
 106       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 107         {
 108           if (retval->successor[cnt]->decided == 0)
 109             _nl_load_domain (retval->successor[cnt], domainbinding);
 110
 111           if (retval->successor[cnt]->data != NULL)
 112             break;
 113         }
 114       return cnt >= 0 ? retval : NULL;
 115       /* NOTREACHED */
 116     }
 117
 118   /* See whether the locale value is an alias.  If yes its value
 119      *overwrites* the alias name.  No test for the original value is
 120      done.  */
 121   alias_value = _nl_expand_alias (locale);
 122   if (alias_value != NULL)
 123     {
 124 #if defined _LIBC || defined HAVE_STRDUP
 125       locale = strdup (alias_value);
 126       if (locale == NULL)
 127         return NULL;
 128 #else
 129       size_t len = strlen (alias_value) + 1;
 130       locale = (char *) malloc (len);
 131       if (locale == NULL)
 132         return NULL;
 133
 134       memcpy (locale, alias_value, len);
 135 #endif
 136     }
 137
 138   /* Now we determine the single parts of the locale name.  First
 139      look for the language.  Termination symbols are `_' and `@' if
 140      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 141   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 142                            &codeset, &normalized_codeset, &special,
 143                            &sponsor, &revision);
 144
 145   /* Create all possible locale entries which might be interested in
 146      generalization.  */
 147   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 148                                strlen (dirname) + 1, mask, language, territory,
 149                                codeset, normalized_codeset, modifier, special,
 150                                sponsor, revision, domainname, 1);
 151   if (retval == NULL)
 152     /* This means we are out of core.  */
 153     return NULL;
 154
 155   if (retval->decided == 0)
 156     _nl_load_domain (retval, domainbinding);
 157   if (retval->data == NULL)
 158     {
 159       int cnt;
 160       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 161         {
 162           if (retval->successor[cnt]->decided == 0)
 163             _nl_load_domain (retval->successor[cnt], domainbinding);
 164           if (retval->successor[cnt]->data != NULL)
 165             break;
 166         }
 167     }
 168
 169   /* The room for an alias was dynamically allocated.  Free it now.  */
 170   if (alias_value != NULL)
 171     free (locale);
 172
 173   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 174   if (mask & XPG_NORM_CODESET)
 175     free ((void *) normalized_codeset);
 176
 177   return retval;
 178 }
 179
 180
 181 #ifdef _LIBC
 182 static void __attribute__ ((unused))
 183 free_mem (void)
 184 {
 185   struct loaded_l10nfile *runp = _nl_loaded_domains;
 186
 187   while (runp != NULL)
 188     {
 189       struct loaded_l10nfile *here = runp;
 190       if (runp->data != NULL)
 191         _nl_unload_domain ((struct loaded_domain *) runp->data);
 192       runp = runp->next;
 193       free ((char *) here->filename);
 194       free (here);
 195     }
 196 }
 197
 198 text_set_element (__libc_subfreeres, free_mem);
 199 #endif