intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995-1999, 2000, 2001, 2002 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 *alias_value;
  64   int mask;
  65
  66   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  67
  68                 language[_territory[.codeset]][@modifier]
  69
  70      Beside the first part all of them are allowed to be missing.  If
  71      the full specified locale is not found, the less specific one are
  72      looked for.  The various parts will be stripped off according to
  73      the following order:
  74                 (1) codeset
  75                 (2) normalized codeset
  76                 (3) territory
  77                 (4) modifier
  78    */
  79
  80   /* If we have already tested for this locale entry there has to
  81      be one data set in the list of loaded domains.  */
  82   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  83                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  84                                NULL, NULL, domainname, 0);
  85   if (retval != NULL)
  86     {
  87       /* We know something about this locale.  */
  88       int cnt;
  89
  90       if (retval->decided == 0)
  91         _nl_load_domain (retval, domainbinding);
  92
  93       if (retval->data != NULL)
  94         return retval;
  95
  96       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
  97         {
  98           if (retval->successor[cnt]->decided == 0)
  99             _nl_load_domain (retval->successor[cnt], domainbinding);
 100
 101           if (retval->successor[cnt]->data != NULL)
 102             break;
 103         }
 104       return cnt >= 0 ? retval : NULL;
 105       /* NOTREACHED */
 106     }
 107
 108   /* See whether the locale value is an alias.  If yes its value
 109      *overwrites* the alias name.  No test for the original value is
 110      done.  */
 111   alias_value = _nl_expand_alias (locale);
 112   if (alias_value != NULL)
 113     {
 114 #if defined _LIBC || defined HAVE_STRDUP
 115       locale = strdup (alias_value);
 116       if (locale == NULL)
 117         return NULL;
 118 #else
 119       size_t len = strlen (alias_value) + 1;
 120       locale = (char *) malloc (len);
 121       if (locale == NULL)
 122         return NULL;
 123
 124       memcpy (locale, alias_value, len);
 125 #endif
 126     }
 127
 128   /* Now we determine the single parts of the locale name.  First
 129      look for the language.  Termination symbols are `_' and `@' if
 130      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 131   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 132                            &codeset, &normalized_codeset);
 133
 134   /* Create all possible locale entries which might be interested in
 135      generalization.  */
 136   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 137                                strlen (dirname) + 1, mask, language, territory,
 138                                codeset, normalized_codeset, modifier,
 139                                domainname, 1);
 140   if (retval == NULL)
 141     /* This means we are out of core.  */
 142     return NULL;
 143
 144   if (retval->decided == 0)
 145     _nl_load_domain (retval, domainbinding);
 146   if (retval->data == NULL)
 147     {
 148       int cnt;
 149       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 150         {
 151           if (retval->successor[cnt]->decided == 0)
 152             _nl_load_domain (retval->successor[cnt], domainbinding);
 153           if (retval->successor[cnt]->data != NULL)
 154             break;
 155         }
 156     }
 157
 158   /* The room for an alias was dynamically allocated.  Free it now.  */
 159   if (alias_value != NULL)
 160     free (locale);
 161
 162   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 163   if (mask & XPG_NORM_CODESET)
 164     free ((void *) normalized_codeset);
 165
 166   return retval;
 167 }
 168
 169
 170 #ifdef _LIBC
 171 static void __attribute__ ((unused))
 172 free_mem (void)
 173 {
 174   struct loaded_l10nfile *runp = _nl_loaded_domains;
 175
 176   while (runp != NULL)
 177     {
 178       struct loaded_l10nfile *here = runp;
 179       if (runp->data != NULL)
 180         _nl_unload_domain ((struct loaded_domain *) runp->data);
 181       runp = runp->next;
 182       free ((char *) here->filename);
 183       free (here);
 184     }
 185 }
 186
 187 text_set_element (__libc_subfreeres, free_mem);
 188 #endif