-int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff);
-long unsigned tv2ms(const struct timeval*);
-void d2tv(double, struct timeval*);
-void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
-void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
+int tv_diff(const struct timeval *b, const struct timeval *a,
+ struct timeval *diff);
+long unsigned tv2ms(const struct timeval *tv);
+void tv_add(const struct timeval *a, const struct timeval *b,
+ struct timeval *sum);
+void tv_scale(const unsigned long mult, const struct timeval *tv,
+ struct timeval *result);