intl/finddomain.c

   1 /* Handle list of needed message catalogs
   2    Copyright (C) 1995, 1996, 1997 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 _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 all of them are allowed to be missing.  If the
  99      full specified locale is not found, the less specific one are
 100      looked for.  The various part will be stripped of 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       size_t len = strlen (alias_value) + 1;
 146       locale = (char *) malloc (len);
 147       if (locale == NULL)
 148         return NULL;
 149
 150       memcpy (locale, alias_value, len);
 151     }
 152
 153   /* Now we determine the single parts of the locale name.  First
 154      look for the language.  Termination symbols are `_' and `@' if
 155      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 156   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 157                            &codeset, &normalized_codeset, &special,
 158                            &sponsor, &revision);
 159
 160   /* Create all possible locale entries which might be interested in
 161      generalization.  */
 162   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 163                                strlen (dirname) + 1, mask, language, territory,
 164                                codeset, normalized_codeset, modifier, special,
 165                                sponsor, revision, domainname, 1);
 166   if (retval == NULL)
 167     /* This means we are out of core.  */
 168     return NULL;
 169
 170   if (retval->decided == 0)
 171     _nl_load_domain (retval);
 172   if (retval->data == NULL)
 173     {
 174       int cnt;
 175       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 176         {
 177           if (retval->successor[cnt]->decided == 0)
 178             _nl_load_domain (retval->successor[cnt]);
 179           if (retval->successor[cnt]->data != NULL)
 180             break;
 181         }
 182     }
 183
 184   /* The room for an alias was dynamically allocated.  Free it now.  */
 185   if (alias_value != NULL)
 186     free (locale);
 187
 188   return retval;
 189 }