/**********************************
  Copyright (C) Rick Wong (Lick)
  http://licklick.wordpress.com/
***********************************/
#ifndef _NDSX_TIME_
#define _NDSX_TIME_

#define ISLEAP(y)           (!((y) % 4) && (((y) % 100) || !((y) % 400)))
#define DAY2S(dys)          u32((dys) * 86400)
#define HOURS2S(hrs)        u32((hrs) * 3600)
#define MINUTES2S(min)      u32((min) * 60)
#define rtc24hours ((IPC->rtc_hours > 51) ? IPC->rtc_hours-40 : IPC->rtc_hours)

u16 mdays[]   = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
u16 mdays_leap[] = { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 };

unsigned long NDSX_time() {
    unsigned long year_shit1 = (IPC->rtc_year+30) >> 2; // divide by 4
    unsigned long year_shit2 = (IPC->rtc_year+30) & 3; // module by 4
    unsigned long years_in_sec = year_shit1 * (31536000*3 + 31622400);
    if(year_shit2 == 1)
        years_in_sec += 31536000;
    else if(year_shit2 == 2)
        years_in_sec += 31536000 + 31622400;
    else if(year_shit2 == 3)
        years_in_sec += (31536000*2) + 31622400;

    return years_in_sec 
        + (ISLEAP(IPC->rtc_year+2000) ?
            DAY2S(mdays_leap[IPC->rtc_month-1]) : DAY2S(mdays[IPC->rtc_month-1]))
        + DAY2S(IPC->rtc_day-1)
        + HOURS2S(rtc24hours)
        + MINUTES2S(IPC->rtc_minutes)
        + IPC->rtc_seconds;
}
#endif