[beast: 3/6] SFI: provide Bse::bse_gettext_domain() and Bse::_() in glib-extra.hh

[Tim Janik <timj src gnome org>]

commit 75b91060d169e8dc6375866a7dccd5b07a2e7971
Author: Tim Janik <timj gnu org>
Date:   Wed Jun 21 11:48:02 2017 +0200

    SFI: provide Bse::bse_gettext_domain() and Bse::_() in glib-extra.hh
    
    Signed-off-by: Tim Janik <timj gnu org>

 sfi/glib-extra.cc |   32 ++++++++++++++++++++++++++++++++
 sfi/glib-extra.hh |    5 +++++
 sfi/sfitests.hh   |    7 -------
 3 files changed, 37 insertions(+), 7 deletions(-)
---
diff --git a/sfi/glib-extra.cc b/sfi/glib-extra.cc
index 07a3b17..5720a99 100644
--- a/sfi/glib-extra.cc
+++ b/sfi/glib-extra.cc
@@ -1,6 +1,7 @@
 // Licensed GNU LGPL v2.1 or later: http://www.gnu.org/licenses/lgpl.html
 #include "bcore.hh"
 #include <string.h>
+#include <libintl.h>
 
 void
 g_object_disconnect_any (gpointer object,
@@ -1077,4 +1078,35 @@ version ()
   return PACKAGE_VERSION;
 }
 
+static bool
+initialize_textdomain()
+{
+  bindtextdomain (BST_GETTEXT_DOMAIN, Bse::installpath (Bse::INSTALLPATH_LOCALEBASE).c_str());
+  bind_textdomain_codeset (BST_GETTEXT_DOMAIN, "UTF-8");
+  return true;
+}
+
+/// The gettext domain used by libbse.
+const char*
+bse_gettext_domain ()
+{
+  static BSE_UNUSED bool init = initialize_textdomain();
+  // Atm, Beast and libbse share a gettext domain.
+  return BST_GETTEXT_DOMAIN;
+}
+
+/// Translate message strings in the BEAST/BSE text domain.
+const char*
+_ (const char *string)
+{
+  return dgettext (bse_gettext_domain(), string);
+}
+
+/// Translate message strings in the BEAST/BSE text domain.
+std::string
+_ (const std::string &string)
+{
+  return _ (string.c_str());
+}
+
 } // Bse
diff --git a/sfi/glib-extra.hh b/sfi/glib-extra.hh
index 3c7ee03..0b0578f 100644
--- a/sfi/glib-extra.hh
+++ b/sfi/glib-extra.hh
@@ -360,6 +360,11 @@ void        installpath_override (const std::string &topdir);
 /// Provide a string containing the BSE library version number.
 std::string version ();
 
+// == Translate i18n strings ==
+const char* bse_gettext_domain ();
+const char* (_)                (const char        *string);
+std::string (_)                (const std::string &string);
+
 } // Bse
 
 #endif /* __SFI_GLIB_EXTRA_H__ */
diff --git a/sfi/sfitests.hh b/sfi/sfitests.hh
index 99d9dc2..5c4cd08 100644
--- a/sfi/sfitests.hh
+++ b/sfi/sfitests.hh
@@ -16,13 +16,6 @@ sfi_init_test (int *argcp, char **argv)
 #define TICK()  TOK()
 #define TACK()  TOK()
 
-#ifndef   _
-#  define _(x)          (x)
-#  define Q_(x)         (x)
-#  define N_(x)         (x)
-#  define U_(x)         (x)
-#endif
-
 /** Macro for test repetitions needed to benchmark in the order of milliseconds.
  * TEST_CALIBRATION() - This macro is used to calculate the number of
  * repetitions needed for execution of a test routine, so that the total