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time
routines for dealing with time
Rusty Russell <rusty@rustcorp.com.au>
This code provides convenient functions for working with time, in the form of 'struct timerel' for durations and 'struct timeabs' for timestamps which are light wrappers around struct timespec.
#include <ccan/time/time.h>
#include <stdlib.h>
#include <stdio.h>
#include <err.h>
int main(int argc, char *argv[])
{
struct timeabs t;
if (argc != 2)
errx(1, "Usage: %s <diff in millisec>", argv[0]);
t = time_now();
if (argv[1][0] == '-')
t = timeabs_sub(t, time_from_msec(atol(argv[1]+1)));
else
t = timeabs_add(t, time_from_msec(atol(argv[1])));
printf("%lu.%09u\n",
(unsigned long)t.ts.tv_sec, (unsigned)t.ts.tv_nsec);
return 0;
}
BSD-MIT