return a.tv_sec < 0 ? -1 : a.tv_sec || a.tv_nsec;
}
+struct timespec timespec_add (struct timespec, struct timespec);
+struct timespec timespec_sub (struct timespec, struct timespec);
+struct timespec dtotimespec (double);
+
+/* Return an approximation to A, of type 'double'. */
+static inline double
+timespectod (struct timespec a)
+{
+ return a.tv_sec + a.tv_nsec / 1e9;
+}
+
void gettime (struct timespec *);
int settime (struct timespec const *);