intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   3    Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 #include <ctype.h>
  24 #include <errno.h>
  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)
  44 # endif
  45 #endif
  46 #if !HAVE_STRCHR && !defined _LIBC
  47 # ifndef strchr
  48 #  define strchr index
  49 # endif
  50 #endif
  51
  52 #if defined HAVE_UNISTD_H || defined _LIBC
  53 # include <unistd.h>
  54 #endif
  55
  56 #include "gettext.h"
  57 #include "gettextP.h"
  58 #ifdef _LIBC
  59 # include <libintl.h>
  60 #else
  61 # include "libgettext.h"
  62 #endif
  63
  64 /* @@ end of prolog @@ */
  65 /* List of already loaded domains.  */
  66 static struct loaded_l10nfile *_nl_loaded_domains;
  67
  68
  69 /* Return a data structure describing the message catalog described by
  70    the DOMAINNAME and CATEGORY parameters with respect to the currently
  71    established bindings.  */
  72 struct loaded_l10nfile *
  73 internal_function
  74 _nl_find_domain (dirname, locale, domainname)
  75      const char *dirname;
  76      char *locale;
  77      const char *domainname;
  78 {
  79   struct loaded_l10nfile *retval;
  80   const char *language;
  81   const char *modifier;
  82   const char *territory;
  83   const char *codeset;
  84   const char *normalized_codeset;
  85   const char *special;
  86   const char *sponsor;
  87   const char *revision;
  88   const char *alias_value;
  89   int mask;
  90
  91   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  92
  93                 language[_territory[.codeset]][@modifier]
  94
  95      and six parts for the CEN syntax:
  96
  97         language[_territory][+audience][+special][,[sponsor][_revision]]
  98
  99      Beside the first part all of them are allowed to be missing.  If
 100      the full specified locale is not found, the less specific one are
 101      looked for.  The various parts will be stripped off according to
 102      the following order:
 103                 (1) revision
 104                 (2) sponsor
 105                 (3) special
 106                 (4) codeset
 107                 (5) normalized codeset
 108                 (6) territory
 109                 (7) audience/modifier
 110    */
 111
 112   /* If we have already tested for this locale entry there has to
 113      be one data set in the list of loaded domains.  */
 114   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 115                                strlen (dirname) + 1, 0, locale, NULL, NULL,
 116                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
 117   if (retval != NULL)
 118     {
 119       /* We know something about this locale.  */
 120       int cnt;
 121
 122       if (retval->decided == 0)
 123         _nl_load_domain (retval);
 124
 125       if (retval->data != NULL)
 126         return retval;
 127
 128       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 129         {
 130           if (retval->successor[cnt]->decided == 0)
 131             _nl_load_domain (retval->successor[cnt]);
 132
 133           if (retval->successor[cnt]->data != NULL)
 134             break;
 135         }
 136       return cnt >= 0 ? retval : NULL;
 137       /* NOTREACHED */
 138     }
 139
 140   /* See whether the locale value is an alias.  If yes its value
 141      *overwrites* the alias name.  No test for the original value is
 142      done.  */
 143   alias_value = _nl_expand_alias (locale);
 144   if (alias_value != NULL)
 145     {
 146 #if defined _LIBC || defined HAVE_STRDUP
 147       locale = strdup (alias_value);
 148       if (locale == NULL)
 149         return NULL;
 150 #else
 151       size_t len = strlen (alias_value) + 1;
 152       locale = (char *) malloc (len);
 153       if (locale == NULL)
 154         return NULL;
 155
 156       memcpy (locale, alias_value, len);
 157 #endif
 158     }
 159
 160   /* Now we determine the single parts of the locale name.  First
 161      look for the language.  Termination symbols are `_' and `@' if
 162      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 163   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 164                            &codeset, &normalized_codeset, &special,
 165                            &sponsor, &revision);
 166
 167   /* Create all possible locale entries which might be interested in
 168      generalization.  */
 169   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 170                                strlen (dirname) + 1, mask, language, territory,
 171                                codeset, normalized_codeset, modifier, special,
 172                                sponsor, revision, domainname, 1);
 173   if (retval == NULL)
 174     /* This means we are out of core.  */
 175     return NULL;
 176
 177   if (retval->decided == 0)
 178     _nl_load_domain (retval);
 179   if (retval->data == NULL)
 180     {
 181       int cnt;
 182       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 183         {
 184           if (retval->successor[cnt]->decided == 0)
 185             _nl_load_domain (retval->successor[cnt]);
 186           if (retval->successor[cnt]->data != NULL)
 187             break;
 188         }
 189     }
 190
 191   /* The room for an alias was dynamically allocated.  Free it now.  */
 192   if (alias_value != NULL)
 193     free (locale);
 194
 195   return retval;
 196 }
 197
 198
 199 #ifdef _LIBC
 200 static void __attribute__ ((unused))
 201 free_mem (void)
 202 {
 203   struct loaded_l10nfile *runp = _nl_loaded_domains;
 204
 205   while (runp != NULL)
 206     {
 207       struct loaded_l10nfile *here = runp;
 208       if (runp->data != NULL)
 209         _nl_unload_domain ((struct loaded_domain *) runp->data);
 210       runp = runp->next;
 211       free (here);
 212     }
 213 }
 214
 215 text_set_element (__libc_subfreeres, free_mem);
 216 #endif