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
  28 #if defined STDC_HEADERS || defined _LIBC
  29 # include <stdlib.h>
  30 #else
  31 # ifdef HAVE_MALLOC_H
  32 #  include <malloc.h>
  33 # else
  34 void free ();
  35 # endif
  36 #endif
  37
  38 #if defined HAVE_STRING_H || defined _LIBC
  39 # include <string.h>
  40 #else
  41 # include <strings.h>
  42 # ifndef memcpy
  43 #  define memcpy(Dst, Src, Num) (bcopy (Src, Dst, Num), (Dst))
  44 # endif
  45 #endif
  46
  47 #if defined HAVE_UNISTD_H || defined _LIBC
  48 # include <unistd.h>
  49 #endif
  50
  51 #include "gettextP.h"
  52 #ifdef _LIBC
  53 # include <libintl.h>
  54 #else
  55 # include "libgnuintl.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, 0);
 112   if (retval != NULL)
 113     {
 114       /* We know something about this locale.  */
 115       int cnt;
 116
 117       if (retval->decided == 0)
 118         _nl_load_domain (retval, domainbinding);
 119
 120       if (retval->data != NULL)
 121         return retval;
 122
 123       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 124         {
 125           if (retval->successor[cnt]->decided == 0)
 126             _nl_load_domain (retval->successor[cnt], domainbinding);
 127
 128           if (retval->successor[cnt]->data != NULL)
 129             break;
 130         }
 131       return cnt >= 0 ? retval : NULL;
 132       /* NOTREACHED */
 133     }
 134
 135   /* See whether the locale value is an alias.  If yes its value
 136      *overwrites* the alias name.  No test for the original value is
 137      done.  */
 138   alias_value = _nl_expand_alias (locale);
 139   if (alias_value != NULL)
 140     {
 141 #if defined _LIBC || defined HAVE_STRDUP
 142       locale = strdup (alias_value);
 143       if (locale == NULL)
 144         return NULL;
 145 #else
 146       size_t len = strlen (alias_value) + 1;
 147       locale = (char *) malloc (len);
 148       if (locale == NULL)
 149         return NULL;
 150
 151       memcpy (locale, alias_value, len);
 152 #endif
 153     }
 154
 155   /* Now we determine the single parts of the locale name.  First
 156      look for the language.  Termination symbols are `_' and `@' if
 157      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 158   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 159                            &codeset, &normalized_codeset, &special,
 160                            &sponsor, &revision);
 161
 162   /* Create all possible locale entries which might be interested in
 163      generalization.  */
 164   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 165                                strlen (dirname) + 1, mask, language, territory,
 166                                codeset, normalized_codeset, modifier, special,
 167                                sponsor, revision, domainname, 1);
 168   if (retval == NULL)
 169     /* This means we are out of core.  */
 170     return NULL;
 171
 172   if (retval->decided == 0)
 173     _nl_load_domain (retval, domainbinding);
 174   if (retval->data == NULL)
 175     {
 176       int cnt;
 177       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 178         {
 179           if (retval->successor[cnt]->decided == 0)
 180             _nl_load_domain (retval->successor[cnt], domainbinding);
 181           if (retval->successor[cnt]->data != NULL)
 182             break;
 183         }
 184     }
 185
 186   /* The room for an alias was dynamically allocated.  Free it now.  */
 187   if (alias_value != NULL)
 188     free (locale);
 189
 190   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 191   if (mask & XPG_NORM_CODESET)
 192     free ((void *) normalized_codeset);
 193
 194   return retval;
 195 }
 196
 197
 198 #ifdef _LIBC
 199 static void __attribute__ ((unused))
 200 free_mem (void)
 201 {
 202   struct loaded_l10nfile *runp = _nl_loaded_domains;
 203
 204   while (runp != NULL)
 205     {
 206       struct loaded_l10nfile *here = runp;
 207       if (runp->data != NULL)
 208         _nl_unload_domain ((struct loaded_domain *) runp->data);
 209       runp = runp->next;
 210       free ((char *) here->filename);
 211       free (here);
 212     }
 213 }
 214
 215 text_set_element (__libc_subfreeres, free_mem);
 216 #endif