#include <common.h>
#include <command.h>
+#include <errno.h>
#include <rtc.h>
#if defined(CONFIG_CMD_DATE) || defined(CONFIG_TIMESTAMP)
/*
* This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
*/
-void GregorianDay(struct rtc_time * tm)
+int rtc_calc_weekday(struct rtc_time *tm)
{
int leapsToDate;
int lastYear;
int day;
int MonthOffset[] = { 0,31,59,90,120,151,181,212,243,273,304,334 };
+ if (tm->tm_year < 1753)
+ return -EINVAL;
lastYear=tm->tm_year-1;
/*
day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] + tm->tm_mday;
tm->tm_wday=day%7;
+
+ return 0;
}
-void to_tm(int tim, struct rtc_time * tm)
+int rtc_to_tm(int tim, struct rtc_time *tm)
{
register int i;
register long hms, day;
/* Days are what is left over (+1) from all that. */
tm->tm_mday = day + 1;
+ /* Zero unused fields */
+ tm->tm_yday = 0;
+ tm->tm_isdst = 0;
+
/*
* Determine the day of week
*/
- GregorianDay(tm);
+ return rtc_calc_weekday(tm);
}
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
* machines were long is 32-bit! (However, as time_t is signed, we
* will already get problems at other places on 2038-01-19 03:14:08)
*/
-unsigned long
-mktime (unsigned int year, unsigned int mon,
- unsigned int day, unsigned int hour,
- unsigned int min, unsigned int sec)
+unsigned long rtc_mktime(const struct rtc_time *tm)
{
- if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
+ int mon = tm->tm_mon;
+ int year = tm->tm_year;
+ int days, hours;
+
+ mon -= 2;
+ if (0 >= (int)mon) { /* 1..12 -> 11,12,1..10 */
mon += 12; /* Puts Feb last since it has leap day */
year -= 1;
}
- return (((
- (unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
- year*365 - 719499
- )*24 + hour /* now have hours */
- )*60 + min /* now have minutes */
- )*60 + sec; /* finally seconds */
+ days = (unsigned long)(year / 4 - year / 100 + year / 400 +
+ 367 * mon / 12 + tm->tm_mday) +
+ year * 365 - 719499;
+ hours = days * 24 + tm->tm_hour;
+ return (hours * 60 + tm->tm_min) * 60 + tm->tm_sec;
}
#endif