gnu/dist/grep/intl/finddomain.c

   1 /*      $NetBSD$        */
   2
   3 /* Handle list of needed message catalogs
   4    Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
   5    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
   6
   7    This program is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU Library General Public License as published
   9    by the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20    USA.  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 # include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <sys/types.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if defined HAVE_UNISTD_H || defined _LIBC
  32 # include <unistd.h>
  33 #endif
  34
  35 #include "gettextP.h"
  36 #ifdef _LIBC
  37 # include <libintl.h>
  38 #else
  39 # include "libgnuintl.h"
  40 #endif
  41
  42 /* @@ end of prolog @@ */
  43 /* List of already loaded domains.  */
  44 static struct loaded_l10nfile *_nl_loaded_domains;
  45
  46
  47 /* Return a data structure describing the message catalog described by
  48    the DOMAINNAME and CATEGORY parameters with respect to the currently
  49    established bindings.  */
  50 struct loaded_l10nfile *
  51 internal_function
  52 _nl_find_domain (dirname, locale, domainname, domainbinding)
  53      const char *dirname;
  54      char *locale;
  55      const char *domainname;
  56      struct binding *domainbinding;
  57 {
  58   struct loaded_l10nfile *retval;
  59   const char *language;
  60   const char *modifier;
  61   const char *territory;
  62   const char *codeset;
  63   const char *normalized_codeset;
  64   const char *special;
  65   const char *sponsor;
  66   const char *revision;
  67   const char *alias_value;
  68   int mask;
  69
  70   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
  71
  72                 language[_territory[.codeset]][@modifier]
  73
  74      and six parts for the CEN syntax:
  75
  76         language[_territory][+audience][+special][,[sponsor][_revision]]
  77
  78      Beside the first part all of them are allowed to be missing.  If
  79      the full specified locale is not found, the less specific one are
  80      looked for.  The various parts will be stripped off according to
  81      the following order:
  82                 (1) revision
  83                 (2) sponsor
  84                 (3) special
  85                 (4) codeset
  86                 (5) normalized codeset
  87                 (6) territory
  88                 (7) audience/modifier
  89    */
  90
  91   /* If we have already tested for this locale entry there has to
  92      be one data set in the list of loaded domains.  */
  93   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
  94                                strlen (dirname) + 1, 0, locale, NULL, NULL,
  95                                NULL, NULL, NULL, NULL, NULL, domainname, 0);
  96   if (retval != NULL)
  97     {
  98       /* We know something about this locale.  */
  99       int cnt;
 100
 101       if (retval->decided == 0)
 102         _nl_load_domain (retval, domainbinding);
 103
 104       if (retval->data != NULL)
 105         return retval;
 106
 107       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 108         {
 109           if (retval->successor[cnt]->decided == 0)
 110             _nl_load_domain (retval->successor[cnt], domainbinding);
 111
 112           if (retval->successor[cnt]->data != NULL)
 113             break;
 114         }
 115       return cnt >= 0 ? retval : NULL;
 116       /* NOTREACHED */
 117     }
 118
 119   /* See whether the locale value is an alias.  If yes its value
 120      *overwrites* the alias name.  No test for the original value is
 121      done.  */
 122   alias_value = _nl_expand_alias (locale);
 123   if (alias_value != NULL)
 124     {
 125 #if defined _LIBC || defined HAVE_STRDUP
 126       locale = strdup (alias_value);
 127       if (locale == NULL)
 128         return NULL;
 129 #else
 130       size_t len = strlen (alias_value) + 1;
 131       locale = (char *) malloc (len);
 132       if (locale == NULL)
 133         return NULL;
 134
 135       memcpy (locale, alias_value, len);
 136 #endif
 137     }
 138
 139   /* Now we determine the single parts of the locale name.  First
 140      look for the language.  Termination symbols are `_' and `@' if
 141      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 142   mask = _nl_explode_name (locale, &language, &modifier, &territory,
 143                            &codeset, &normalized_codeset, &special,
 144                            &sponsor, &revision);
 145
 146   /* Create all possible locale entries which might be interested in
 147      generalization.  */
 148   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
 149                                strlen (dirname) + 1, mask, language, territory,
 150                                codeset, normalized_codeset, modifier, special,
 151                                sponsor, revision, domainname, 1);
 152   if (retval == NULL)
 153     /* This means we are out of core.  */
 154     return NULL;
 155
 156   if (retval->decided == 0)
 157     _nl_load_domain (retval, domainbinding);
 158   if (retval->data == NULL)
 159     {
 160       int cnt;
 161       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
 162         {
 163           if (retval->successor[cnt]->decided == 0)
 164             _nl_load_domain (retval->successor[cnt], domainbinding);
 165           if (retval->successor[cnt]->data != NULL)
 166             break;
 167         }
 168     }
 169
 170   /* The room for an alias was dynamically allocated.  Free it now.  */
 171   if (alias_value != NULL)
 172     free (locale);
 173
 174   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
 175   if (mask & XPG_NORM_CODESET)
 176     free ((void *) normalized_codeset);
 177
 178   return retval;
 179 }
 180
 181
 182 #ifdef _LIBC
 183 static void __attribute__ ((unused))
 184 free_mem (void)
 185 {
 186   struct loaded_l10nfile *runp = _nl_loaded_domains;
 187
 188   while (runp != NULL)
 189     {
 190       struct loaded_l10nfile *here = runp;
 191       if (runp->data != NULL)
 192         _nl_unload_domain ((struct loaded_domain *) runp->data);
 193       runp = runp->next;
 194       free ((char *) here->filename);
 195       free (here);
 196     }
 197 }
 198
 199 text_set_element (__libc_subfreeres, free_mem);
 200 #endif