intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
   3    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library 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 the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <ctype.h>
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <sys/types.h>
  28
  29 #if defined STDC_HEADERS || defined _LIBC
  30 # include <stdlib.h>
  31 #else
  32 # ifdef HAVE_MALLOC_H
  33 #  include <malloc.h>
  34 # else
  35 void free ();
  36 # endif
  37 #endif
  38
  39 #if defined HAVE_STRING_H || defined _LIBC
  40 # include <string.h>
  41 #else
  42 # include <strings.h>
  43 # ifndef memcpy
  44 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  45 # endif
  46 #endif
  47
  48 #if defined HAVE_UNISTD_H || defined _LIBC
  49 # include <unistd.h>
  50 #endif
  51
  52 #include "gettext.h"
  53 #include "gettextP.h"
  54 #ifdef _LIBC
  55 # include <libintl.h>
  56 #else
  57 # include "libgettext.h"
  58 #endif
  59
  60 /* @@ end of prolog @@ */
  61 /* List of already loaded domains.  */
  62 static struct loaded_l10nfile *_nl_loaded_domains;
  63
  64
  65 /* Return a data structure describing the message catalog described by
  66    the DOMAINNAME and CATEGORY parameters with respect to the currently
  67    established bindings.  */
  68 struct loaded_l10nfile *
  69 internal_function
  70 _nl_find_domain (dirname, locale, domainname, domainbinding)
  71      const char *dirname;
  72      char *locale;
  73      const char *domainname;
  74      struct binding *domainbinding;
  75 {
  76   struct loaded_l10nfile *retval;
  77   const char *language;
  78   const char *modifier;
  79   const char *territory;
  80   const char *codeset;
  81   const char *normalized_codeset;
  82   const char *special;
  83   const char *sponsor;
  84   const char *revision;
  85   const char *alias_value;
  86   int mask;
  87
  88   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  89
  90                 language[_territory[.codeset]][@modifier]
  91
  92      and six parts for the CEN syntax:
  93
  94         language[_territory][+audience][+special][,[sponsor][_revision]]
  95
  96      Beside the first part all of them are allowed to be missing.  If
  97      the full specified locale is not found, the less specific one are
  98      looked for.  The various parts will be stripped off according to
  99      the following order:
 100                 (1) revision
 101                 (2) sponsor
 102                 (3) special
 103                 (4) codeset
 104                 (5) normalized codeset
 105                 (6) territory
 106                 (7) audience/modifier
 107    */
 108
 109   /* If we have already tested for this locale entry there has to
 110      be one data set in the list of loaded domains.  */
 111   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 112                                strlen (dirname) + 1, 0, locale, NULL, NULL,
 113                                NULL, NULL, NULL, NULL, NULL, domainname,
 114                                domainbinding, 0);
 115   if (retval != NULL)
 116     {
 117       /* We know something about this locale.  */
 118       int cnt;
 119
 120       if (retval->decided == 0)
 121         _nl_load_domain (retval);
 122
 123       if (retval->data != NULL)
 124         return retval;
 125
 126       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 127         {
 128           if (retval->successor[cnt]->decided == 0)
 129             _nl_load_domain (retval->successor[cnt]);
 130
 131           if (retval->successor[cnt]->data != NULL)
 132             break;
 133         }
 134       return cnt >= 0 ? retval : NULL;
 135       /* NOTREACHED */
 136     }
 137
 138   /* See whether the locale value is an alias.  If yes its value
 139      *overwrites* the alias name.  No test for the original value is
 140      done.  */
 141   alias_value = _nl_expand_alias (locale);
 142   if (alias_value != NULL)
 143     {
 144 #if defined _LIBC || defined HAVE_STRDUP
 145       locale = strdup (alias_value);
 146       if (locale == NULL)
 147         return NULL;
 148 #else
 149       size_t len = strlen (alias_value) + 1;
 150       locale = (char *) malloc (len);
 151       if (locale == NULL)
 152         return NULL;
 153
 154       memcpy (locale, alias_value, len);
 155 #endif
 156     }
 157
 158   /* Now we determine the single parts of the locale name.  First
 159      look for the language.  Termination symbols are `_' and `@' if
 160      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 161   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 162                            &codeset, &normalized_codeset, &special,
 163                            &sponsor, &revision);
 164
 165   /* Create all possible locale entries which might be interested in
 166      generalization.  */
 167   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 168                                strlen (dirname) + 1, mask, language, territory,
 169                                codeset, normalized_codeset, modifier, special,
 170                                sponsor, revision, domainname, domainbinding,
 171                                1);
 172   if (retval == NULL)
 173     /* This means we are out of core.  */
 174     return NULL;
 175
 176   if (retval->decided == 0)
 177     _nl_load_domain (retval);
 178   if (retval->data == NULL)
 179     {
 180       int cnt;
 181       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 182         {
 183           if (retval->successor[cnt]->decided == 0)
 184             _nl_load_domain (retval->successor[cnt]);
 185           if (retval->successor[cnt]->data != NULL)
 186             break;
 187         }
 188     }
 189
 190   /* The room for an alias was dynamically allocated.  Free it now.  */
 191   if (alias_value != NULL)
 192     free (locale);
 193
 194   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 195   if (mask & XPG_NORM_CODESET)
 196     free ((void *) normalized_codeset);
 197
 198   return retval;
 199 }
 200
 201
 202 #ifdef _LIBC
 203 static void __attribute__ ((unused))
 204 free_mem (void)
 205 {
 206   struct loaded_l10nfile *runp = _nl_loaded_domains;
 207
 208   while (runp != NULL)
 209     {
 210       struct loaded_l10nfile *here = runp;
 211       if (runp->data != NULL)
 212         _nl_unload_domain ((struct loaded_domain *) runp->data);
 213       runp = runp->next;
 214       free ((char *) here->filename);
 215       free (here);
 216     }
 217 }
 218
 219 text_set_element (__libc_subfreeres, free_mem);
 220 #endif