void
clock_ts_to_ct(struct timespec *ts, struct clocktime *ct)
{
time_t i, year, days;
time_t rsec; /* remainder seconds */
time_t secs;
secs = ts->tv_sec;
days = secs / SECDAY;
rsec = secs % SECDAY;
ct->dow = day_of_week(days);
/* Subtract out whole years, counting them in i. */
for (year = POSIX_BASE_YEAR; days >= days_in_year(year); year++)
days -= days_in_year(year);
ct->year = year;
/* Subtract out whole months, counting them in i. */
for (i = 1; days >= days_in_month(year, i); i++)
days -= days_in_month(year, i);
ct->mon = i;
/* Days are what is left over (+1) from all that. */
ct->day = days + 1;
/* Hours, minutes, seconds are easy */
ct->hour = rsec / 3600;
rsec = rsec % 3600;
ct->min = rsec / 60;
rsec = rsec % 60;
ct->sec = rsec;
ct->nsec = ts->tv_nsec;
if (ct_debug) {
printf("ts_to_ct(%ld.%09ld) = ",
(long)ts->tv_sec, (long)ts->tv_nsec);
print_ct(ct);
printf("\n");
}
KASSERT(ct->year >= 0 && ct->year < 10000,
("year %d isn't a 4 digit year", ct->year));
KASSERT(ct->mon >= 1 && ct->mon <= 12,
("month %d not in 1-12", ct->mon));
KASSERT(ct->day >= 1 && ct->day <= 31,
("day %d not in 1-31", ct->day));
KASSERT(ct->hour >= 0 && ct->hour <= 23,
("hour %d not in 0-23", ct->hour));
KASSERT(ct->min >= 0 && ct->min <= 59,
("minute %d not in 0-59", ct->min));
/* Not sure if this interface needs to handle leapseconds or not. */
KASSERT(ct->sec >= 0 && ct->sec <= 60,
("seconds %d not in 0-60", ct->sec));
}
int
clock_ct_to_ts(struct clocktime *ct, struct timespec *ts)
{
time_t secs;
int i, year, days;
year = ct->year;
if (ct_debug) {
printf("ct_to_ts(");
print_ct(ct);
printf(")");
}
/* Sanity checks. */
if (ct->mon < 1 || ct->mon > 12 || ct->day < 1 ||
ct->day > days_in_month(year, ct->mon) ||
ct->hour > 23 || ct->min > 59 || ct->sec > 59 ||
ct->year > 2037) { /* time_t overflow */
if (ct_debug)
printf(" = EINVAL\n");
return (EINVAL);
}
/*
* Compute days since start of time
* First from years, then from months.
*/
days = 0;
for (i = POSIX_BASE_YEAR; i < year; i++)
days += days_in_year(i);
/* Months */
for (i = 1; i < ct->mon; i++)
days += days_in_month(year, i);
days += (ct->day - 1);
/* Add hours, minutes, seconds. */
secs = ((days * 24 + ct->hour) * 60 + ct->min) * 60 + ct->sec;
ts->tv_sec = secs;
ts->tv_nsec = ct->nsec;
if (ct_debug)
printf(" = %ld.%09ld\n", (long)ts->tv_sec, (long)ts->tv_nsec);
return (0);
}
void
clock_ts_to_ct(struct timespec *ts, struct clocktime *ct)
{
int i, year, days;
time_t rsec; /* remainder seconds */
time_t secs;
secs = ts->tv_sec;
days = secs / SECDAY;
rsec = secs % SECDAY;
ct->dow = day_of_week(days);
/* Subtract out whole years, counting them in i. */
for (year = POSIX_BASE_YEAR; days >= days_in_year(year); year++)
days -= days_in_year(year);
ct->year = year;
/* Subtract out whole months, counting them in i. */
for (i = 1; days >= days_in_month(year, i); i++)
days -= days_in_month(year, i);
ct->mon = i;
/* Days are what is left over (+1) from all that. */
ct->day = days + 1;
/* Hours, minutes, seconds are easy */
ct->hour = rsec / 3600;
rsec = rsec % 3600;
ct->min = rsec / 60;
rsec = rsec % 60;
ct->sec = rsec;
ct->nsec = ts->tv_nsec;
if (ct_debug) {
printf("ts_to_ct(%ld.%09ld) = ",
(long)ts->tv_sec, (long)ts->tv_nsec);
print_ct(ct);
printf("\n");
}
}
