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 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
  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 (dirname, locale, domainname, domainbinding)
  51      const char *dirname;
  52      char *locale;
  53      const char *domainname;
  54      struct binding *domainbinding;
  55 {
  56   struct loaded_l10nfile *retval;
  57   const char *language;
  58   const char *modifier;
  59   const char *territory;
  60   const char *codeset;
  61   const char *normalized_codeset;
  62   const char *special;
  63   const char *sponsor;
  64   const char *revision;
  65   const char *alias_value;
  66   int mask;
  67
  68   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  69
  70                 language[_territory[.codeset]][@modifier]
  71
  72      and six parts for the CEN syntax:
  73
  74         language[_territory][+audience][+special][,[sponsor][_revision]]
  75
  76      Beside the first part all of them are allowed to be missing.  If
  77      the full specified locale is not found, the less specific one are
  78      looked for.  The various parts will be stripped off according to
  79      the following order:
  80                 (1) revision
  81                 (2) sponsor
  82                 (3) special
  83                 (4) codeset
  84                 (5) normalized codeset
  85                 (6) territory
  86                 (7) audience/modifier
  87    */
  88
  89   /* If we have already tested for this locale entry there has to
  90      be one data set in the list of loaded domains.  */
  91   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  92                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  93                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
  94   if (retval != NULL)
  95     {
  96       /* We know something about this locale.  */
  97       int cnt;
  98
  99       if (retval->decided == 0)
 100         _nl_load_domain (retval, domainbinding);
 101
 102       if (retval->data != NULL)
 103         return retval;
 104
 105       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 106         {
 107           if (retval->successor[cnt]->decided == 0)
 108             _nl_load_domain (retval->successor[cnt], domainbinding);
 109
 110           if (retval->successor[cnt]->data != NULL)
 111             break;
 112         }
 113       return cnt >= 0 ? retval : NULL;
 114       /* NOTREACHED */
 115     }
 116
 117   /* See whether the locale value is an alias.  If yes its value
 118      *overwrites* the alias name.  No test for the original value is
 119      done.  */
 120   alias_value = _nl_expand_alias (locale);
 121   if (alias_value != NULL)
 122     {
 123 #if defined _LIBC || defined HAVE_STRDUP
 124       locale = strdup (alias_value);
 125       if (locale == NULL)
 126         return NULL;
 127 #else
 128       size_t len = strlen (alias_value) + 1;
 129       locale = (char *) malloc (len);
 130       if (locale == NULL)
 131         return NULL;
 132
 133       memcpy (locale, alias_value, len);
 134 #endif
 135     }
 136
 137   /* Now we determine the single parts of the locale name.  First
 138      look for the language.  Termination symbols are `_' and `@' if
 139      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 140   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 141                            &codeset, &normalized_codeset, &special,
 142                            &sponsor, &revision);
 143
 144   /* Create all possible locale entries which might be interested in
 145      generalization.  */
 146   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 147                                strlen (dirname) + 1, mask, language, territory,
 148                                codeset, normalized_codeset, modifier, special,
 149                                sponsor, revision, domainname, 1);
 150   if (retval == NULL)
 151     /* This means we are out of core.  */
 152     return NULL;
 153
 154   if (retval->decided == 0)
 155     _nl_load_domain (retval, domainbinding);
 156   if (retval->data == NULL)
 157     {
 158       int cnt;
 159       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 160         {
 161           if (retval->successor[cnt]->decided == 0)
 162             _nl_load_domain (retval->successor[cnt], domainbinding);
 163           if (retval->successor[cnt]->data != NULL)
 164             break;
 165         }
 166     }
 167
 168   /* The room for an alias was dynamically allocated.  Free it now.  */
 169   if (alias_value != NULL)
 170     free (locale);
 171
 172   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 173   if (mask & XPG_NORM_CODESET)
 174     free ((void *) normalized_codeset);
 175
 176   return retval;
 177 }
 178
 179
 180 #ifdef _LIBC
 181 libc_freeres_fn (free_mem)
 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 #endif