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