43  * Make `t1' consistent.
47 timevalfix(struct timeval *t1)  in timevalfix()  argument
49     if (t1->tv_usec < 0) {  in timevalfix()
50         t1->tv_sec--;  in timevalfix()
51         t1->tv_usec += 1000000;  in timevalfix()
53     if (t1->tv_usec >= 1000000) {  in timevalfix()
54         t1->tv_sec++;  in timevalfix()
55         t1->tv_usec -= 1000000;  in timevalfix()
60  * t1 += t2
64 timevaladd(struct timeval *t1, const struct timeval *t2)  in timevaladd()  argument
66     t1->tv_sec  += t2->tv_sec;  in timevaladd()
67     t1->tv_usec += t2->tv_usec;  in timevaladd()
68     timevalfix(t1);  in timevaladd()
72  * t1 -= t2
76 timevalsub(struct timeval *t1, const struct timeval *t2)  in timevalsub()  argument
78     t1->tv_sec  -= t2->tv_sec;  in timevalsub()
79     t1->tv_usec -= t2->tv_usec;  in timevalsub()
80     timevalfix(t1);  in timevalsub()