67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/* $NetBSD: clock.c,v 1.1 2002/02/27 21:02:27 scw Exp $ */
|
|
|
|
/*
|
|
* This is a slightly modified version of mvme68k's standalone clock.c.
|
|
* As there was no attribution/copyright header on that file, there's
|
|
* not going to be one for this file.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "stand.h"
|
|
#include "libsa.h"
|
|
#include "bugsyscalls.h"
|
|
|
|
#define FROMBCD(x) (int)((((unsigned int)(x)) >> 4) * 10 +\
|
|
(((unsigned int)(x)) & 0xf))
|
|
|
|
#define SECDAY (24 * 60 * 60)
|
|
#define SECYR (SECDAY * 365)
|
|
#define LEAPYEAR(y) (((y) & 3) == 0)
|
|
#define YEAR0 68
|
|
|
|
/*
|
|
* This code is defunct after 2068.
|
|
* Will Unix still be here then??
|
|
*/
|
|
const short dayyr[12] =
|
|
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
|
|
|
|
static u_long
|
|
chiptotime(int sec, int min, int hour, int day, int mon, int year)
|
|
{
|
|
int days, yr;
|
|
|
|
sec = FROMBCD(sec);
|
|
min = FROMBCD(min);
|
|
hour = FROMBCD(hour);
|
|
day = FROMBCD(day);
|
|
mon = FROMBCD(mon);
|
|
year = FROMBCD(year) + YEAR0;
|
|
if (year < 70)
|
|
year = 70;
|
|
|
|
/* simple sanity checks */
|
|
if (year < 70 || mon < 1 || mon > 12 || day < 1 || day > 31)
|
|
return (0);
|
|
days = 0;
|
|
for (yr = 70; yr < year; yr++)
|
|
days += LEAPYEAR(yr) ? 366 : 365;
|
|
days += dayyr[mon - 1] + day - 1;
|
|
if (LEAPYEAR(yr) && mon > 2)
|
|
days++;
|
|
/* now have days since Jan 1, 1970; the rest is easy... */
|
|
return (days * SECDAY + hour * 3600 + min * 60 + sec);
|
|
}
|
|
|
|
time_t
|
|
getsecs()
|
|
{
|
|
struct bug_rtc_rd rr;
|
|
|
|
bugsys_rtc_rd(&rr);
|
|
|
|
return (chiptotime(rr.rr_second, rr.rr_minute, rr.rr_hour,
|
|
rr.rr_dayofmonth, rr.rr_month, rr.rr_year));
|
|
}
|