--- /dev/null
+#include "util.h"
+
+int main(int argc, char *argv[]) {
+
+ GTimeVal a = { 5, 5 }, b;
+
+ b = a;
+
+ g_message("%li.%li", a.tv_sec, a.tv_usec);
+ avahi_timeval_add(&a, -50);
+
+ g_message("%li.%li", a.tv_sec, a.tv_usec);
+
+ g_message("%lli", avahi_timeval_diff(&a, &b));
+}