g_variant_builder_new使用

?

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static void ListExtraVideoDirectories(cDBusObject *Object, GVariant *Parameters, GDBusMethodInvocation *Invocation)   {     int replyCode = 500;     cString replyMessage = "Missing extra-video-directories patch";     cStringList dirs; #ifdef EXTRA_VIDEO_DIRECTORIES_PATCH     if (!LockExtraVideoDirectories(false)) {        replyCode = 550;        replyMessage = "Unable to lock extra video directory list";        }     else {        if (ExtraVideoDirectories.Size() == 0) {           replyCode = 550;           replyMessage = "no extra video directories in list";           }        else {           replyCode = 250;           replyMessage = "";           for (int i = 0; i < ExtraVideoDirectories.Size(); i++)               dirs.Append(strdup(ExtraVideoDirectories.At(i)));           }        UnlockExtraVideoDirectories();        } #endif     GVariantBuilder *builder = g_variant_builder_new(G_VARIANT_TYPE("(isas)"));     g_variant_builder_add(builder, "i", replyCode);     g_variant_builder_add(builder, "s", *replyMessage);     GVariantBuilder *array = g_variant_builder_new(G_VARIANT_TYPE("as"));     for (int i = 0; i < dirs.Size(); i++)         g_variant_builder_add(array, "s", dirs.At(i));     g_variant_builder_add_value(builder, g_variant_builder_end(array));     g_dbus_method_invocation_return_value(Invocation, g_variant_builder_end(builder));     g_variant_builder_unref(array);     g_variant_builder_unref(builder);   };

　　

 static void List(cDBusObject *Object, GVariant *Parameters, GDBusMethodInvocation *Invocation)
  {
    if (g_strcmp0(g_dbus_method_invocation_get_interface_name(Invocation), DBUS_VDR_PLUGIN_INTERFACE) == 0)
       esyslog("dbus2vdr: use of deprecated interface: 'List' should be called with the interface '%s'!", DBUS_VDR_PLUGINMANAGER_INTERFACE);

#define EMPTY(s) (s == NULL ? "" : s)
    GVariantBuilder *array = g_variant_builder_new(G_VARIANT_TYPE("a(ss)"));
    int index = 0;
    do
    {
      cPlugin *plugin = cPluginManager::GetPlugin(index);
      if (plugin == NULL)
         break;
      const char *name = plugin->Name();
      const char *version = plugin->Version();
      g_variant_builder_add(array, "(ss)", EMPTY(name), EMPTY(version));
      index++;
    } while (true);
#undef EMPTY

    GVariantBuilder *builder = g_variant_builder_new(G_VARIANT_TYPE("(a(ss))"));
    g_variant_builder_add_value(builder, g_variant_builder_end(array));
    g_dbus_method_invocation_return_value(Invocation, g_variant_builder_end(builder));
    g_variant_builder_unref(array);
    g_variant_builder_unref(builder);
  }