GNUNET_TIME_Relative
duration);
+
+/**
+ * Subtract a given relative duration from the
+ * given start time.
+ *
+ * @param start some absolute time
+ * @param duration some relative time to subtract
+ * @return ZERO if start <= duration, or FOREVER if start time is FOREVER; start-duration otherwise
+ */
+struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_subtract (struct
+ GNUNET_TIME_Absolute
+ start,
+ struct
+ GNUNET_TIME_Relative
+ duration);
+
/**
* Multiply relative time by a given factor.
*