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)
  71      const char *dirname;
  72      char *locale;
  73      const char *domainname;
  74 {
  75   struct loaded_l10nfile *retval;
  76   const char *language;
  77   const char *modifier;
  78   const char *territory;
  79   const char *codeset;
  80   const char *normalized_codeset;
  81   const char *special;
  82   const char *sponsor;
  83   const char *revision;
  84   const char *alias_value;
  85   int mask;
  86
  87   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  88
  89                 language[_territory[.codeset]][@modifier]
  90
  91      and six parts for the CEN syntax:
  92
  93         language[_territory][+audience][+special][,[sponsor][_revision]]
  94
  95      Beside the first part all of them are allowed to be missing.  If
  96      the full specified locale is not found, the less specific one are
  97      looked for.  The various parts will be stripped off according to
  98      the following order:
  99                 (1) revision
 100                 (2) sponsor
 101                 (3) special
 102                 (4) codeset
 103                 (5) normalized codeset
 104                 (6) territory
 105                 (7) audience/modifier
 106    */
 107
 108   /* If we have already tested for this locale entry there has to
 109      be one data set in the list of loaded domains.  */
 110   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 111                                strlen (dirname) + 1, 0, locale, NULL, NULL,
 112                                NULL, NULL, NULL, NULL, NULL, domainname, 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, 1);
 169   if (retval == NULL)
 170     /* This means we are out of core.  */
 171     return NULL;
 172
 173   if (retval->decided == 0)
 174     _nl_load_domain (retval);
 175   if (retval->data == NULL)
 176     {
 177       int cnt;
 178       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 179         {
 180           if (retval->successor[cnt]->decided == 0)
 181             _nl_load_domain (retval->successor[cnt]);
 182           if (retval->successor[cnt]->data != NULL)
 183             break;
 184         }
 185     }
 186
 187   /* The room for an alias was dynamically allocated.  Free it now.  */
 188   if (alias_value != NULL)
 189     free (locale);
 190
 191   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 192   if (mask & XPG_NORM_CODESET)
 193     free ((void *) normalized_codeset);
 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 ((char *) here->filename);
 212       free (here);
 213     }
 214 }
 215
 216 text_set_element (__libc_subfreeres, free_mem);
 217 #endif