--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xia-debug.c	Sat Apr 27 00:33:11 2013 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013 Guido Berhoerster <guido+xinhibit-applet@berhoerster.name>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdarg.h>
+#include <glib.h>
+
+#include "xia-debug.h"
+
+static void
+dummy_log_handler(const gchar *log_domain, GLogLevelFlags log_level,
+    const gchar *message, gpointer data)
+{
+	/* Swallow all messages */
+}
+
+void
+xia_debug_init(gboolean debug_mode)
+{
+	/*
+	 * glib >= 2.32 only shows debug messages if G_MESSAGES_DEBUG contains
+	 * the log domain or "all", earlier glib version always show debugging
+	 * output
+	 */
+#if GLIB_CHECK_VERSION(2, 32, 0)
+	const gchar	*debug_env;
+	gchar		*debug_env_new;
+
+	if (debug_mode) {
+		debug_env = g_getenv("G_MESSAGES_DEBUG");
+
+		if (debug_env == NULL) {
+			g_setenv("G_MESSAGES_DEBUG", G_LOG_DOMAIN, TRUE);
+		} else if (strstr(debug_env, G_LOG_DOMAIN) == NULL) {
+			debug_env_new = g_strdup_printf("%s %s", debug_env,
+			    G_LOG_DOMAIN);
+			g_setenv("G_MESSAGES_DEBUG", debug_env_new, TRUE);
+			g_free(debug_env_new);
+		}
+	}
+#else
+	if (!debug_mode) {
+		g_log_set_handler(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
+		    dummy_log_handler, NULL);
+	}
+#endif /* GLIB_CHECK_VERSION (2,32,0) */
+}