common/i18n.c

   1 /* i18n.c - gettext initialization
   2  *      Copyright (C) 2007 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #ifdef HAVE_LOCALE_H
  22 #include <locale.h>
  23 #endif
  24 #ifdef HAVE_LANGINFO_CODESET
  25 #include <langinfo.h>
  26 #endif
  27
  28 #include "util.h"
  29 #include "i18n.h"
  30
  31
  32 void
  33 i18n_init (void)
  34 {
  35 #ifdef USE_SIMPLE_GETTEXT
  36   bindtextdomain (PACKAGE_GT, gnupg_localedir ());
  37 #else
  38 # ifdef ENABLE_NLS
  39   setlocale (LC_ALL, "" );
  40   bindtextdomain (PACKAGE_GT, LOCALEDIR);
  41   textdomain (PACKAGE_GT);
  42 # endif
  43 #endif
  44 }
  45
  46
  47 /* The Assuan agent protocol requires us to transmit utf-8 strings
  48    thus we need a way to temporary switch gettext from native to
  49    utf8.  */
  50 char *
  51 i18n_switchto_utf8 (void)
  52 {
  53 #ifdef USE_SIMPLE_GETTEXT
  54   gettext_select_utf8 (1);
  55   return NULL;
  56 #elif defined(ENABLE_NLS)
  57   char *orig_codeset = bind_textdomain_codeset (PACKAGE_GT, NULL);
  58 # ifdef HAVE_LANGINFO_CODESET
  59   if (!orig_codeset)
  60     orig_codeset = nl_langinfo (CODESET);
  61 # endif
  62   if (orig_codeset)
  63     { /* We only switch when we are able to restore the codeset later.
  64          Note that bind_textdomain_codeset does only return on memory
  65          errors but not if a codeset is not available.  Thus we don't
  66          bother printing a diagnostic here. */
  67       orig_codeset = xstrdup (orig_codeset);
  68       if (!bind_textdomain_codeset (PACKAGE_GT, "utf-8"))
  69         {
  70           xfree (orig_codeset);
  71           orig_codeset = NULL;
  72         }
  73     }
  74   return orig_codeset;
  75 #else
  76   return NULL;
  77 #endif
  78 }
  79
  80 /* Switch back to the saved codeset.  */
  81 void
  82 i18n_switchback (char *saved_codeset)
  83 {
  84 #ifdef USE_SIMPLE_GETTEXT
  85   (void)saved_codeset;
  86   gettext_select_utf8 (0);
  87 #elif defined(ENABLE_NLS)
  88   if (saved_codeset)
  89     {
  90       bind_textdomain_codeset (PACKAGE_GT, saved_codeset);
  91       xfree (saved_codeset);
  92     }
  93 #else
  94   (void)saved_codeset;
  95 #endif
  96 }
  97
  98
  99 /* Gettext variant which temporary switches to utf-8 for string. */
 100 const char *
 101 i18n_utf8 (const char *string)
 102 {
 103   char *saved = i18n_switchto_utf8 ();
 104   const char *result = _(string);
 105   i18n_switchback (saved);
 106   return result;
 107 }