/* $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)); }