intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   3    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
   4
   5    This file is part of the GNU C Library.  Its master source is NOT part of
   6    the C library, however.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Library General Public License as
  10    published by the Free Software Foundation; either version 2 of the
  11    License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Library General Public License for more details.
  17
  18    You should have received a copy of the GNU Library General Public
  19    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  20    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include <config.h>
  25 #endif
  26
  27 #include <ctype.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <sys/types.h>
  31
  32 #if defined STDC_HEADERS || defined _LIBC
  33 # include <stdlib.h>
  34 #else
  35 # ifdef HAVE_MALLOC_H
  36 #  include <malloc.h>
  37 # else
  38 void free ();
  39 # endif
  40 #endif
  41
  42 #if defined HAVE_STRING_H || defined _LIBC
  43 # include <string.h>
  44 #else
  45 # include <strings.h>
  46 # ifndef memcpy
  47 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  48 # endif
  49 #endif
  50
  51 #if defined HAVE_UNISTD_H || defined _LIBC
  52 # include <unistd.h>
  53 #endif
  54
  55 #include "gettext.h"
  56 #include "gettextP.h"
  57 #ifdef _LIBC
  58 # include <libintl.h>
  59 #else
  60 # include "libgettext.h"
  61 #endif
  62
  63 /* @@ end of prolog @@ */
  64 /* List of already loaded domains.  */
  65 static struct loaded_l10nfile *_nl_loaded_domains;
  66
  67
  68 /* Return a data structure describing the message catalog described by
  69    the DOMAINNAME and CATEGORY parameters with respect to the currently
  70    established bindings.  */
  71 struct loaded_l10nfile *
  72 internal_function
  73 _nl_find_domain (dirname, locale, domainname)
  74      const char *dirname;
  75      char *locale;
  76      const char *domainname;
  77 {
  78   struct loaded_l10nfile *retval;
  79   const char *language;
  80   const char *modifier;
  81   const char *territory;
  82   const char *codeset;
  83   const char *normalized_codeset;
  84   const char *special;
  85   const char *sponsor;
  86   const char *revision;
  87   const char *alias_value;
  88   int mask;
  89
  90   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  91
  92                 language[_territory[.codeset]][@modifier]
  93
  94      and six parts for the CEN syntax:
  95
  96         language[_territory][+audience][+special][,[sponsor][_revision]]
  97
  98      Beside the first part all of them are allowed to be missing.  If
  99      the full specified locale is not found, the less specific one are
 100      looked for.  The various parts will be stripped off according to
 101      the following order:
 102                 (1) revision
 103                 (2) sponsor
 104                 (3) special
 105                 (4) codeset
 106                 (5) normalized codeset
 107                 (6) territory
 108                 (7) audience/modifier
 109    */
 110
 111   /* If we have already tested for this locale entry there has to
 112      be one data set in the list of loaded domains.  */
 113   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 114                                strlen (dirname) + 1, 0, locale, NULL, NULL,
 115                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
 116   if (retval != NULL)
 117     {
 118       /* We know something about this locale.  */
 119       int cnt;
 120
 121       if (retval->decided == 0)
 122         _nl_load_domain (retval);
 123
 124       if (retval->data != NULL)
 125         return retval;
 126
 127       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 128         {
 129           if (retval->successor[cnt]->decided == 0)
 130             _nl_load_domain (retval->successor[cnt]);
 131
 132           if (retval->successor[cnt]->data != NULL)
 133             break;
 134         }
 135       return cnt >= 0 ? retval : NULL;
 136       /* NOTREACHED */
 137     }
 138
 139   /* See whether the locale value is an alias.  If yes its value
 140      *overwrites* the alias name.  No test for the original value is
 141      done.  */
 142   alias_value = _nl_expand_alias (locale);
 143   if (alias_value != NULL)
 144     {
 145 #if defined _LIBC || defined HAVE_STRDUP
 146       locale = strdup (alias_value);
 147       if (locale == NULL)
 148         return NULL;
 149 #else
 150       size_t len = strlen (alias_value) + 1;
 151       locale = (char *) malloc (len);
 152       if (locale == NULL)
 153         return NULL;
 154
 155       memcpy (locale, alias_value, len);
 156 #endif
 157     }
 158
 159   /* Now we determine the single parts of the locale name.  First
 160      look for the language.  Termination symbols are `_' and `@' if
 161      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 162   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 163                            &codeset, &normalized_codeset, &special,
 164                            &sponsor, &revision);
 165
 166   /* Create all possible locale entries which might be interested in
 167      generalization.  */
 168   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 169                                strlen (dirname) + 1, mask, language, territory,
 170                                codeset, normalized_codeset, modifier, special,
 171                                sponsor, revision, domainname, 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   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