forked from KolibriOS/kolibrios
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
#include <time.h>
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#include <kolibrisys.h>
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struct tm __buffertime;
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struct tm * localtime (const time_t * timer)
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/* non-standard! ignore parameter and return just time now */
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{
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int kos_date, kos_time;
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kos_date = _ksys_get_date();
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kos_time = _ksys_get_system_clock();
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int bcd_day = (kos_date >> 16);
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int bcd_mon = ((kos_date & 0xFF00) >> 8);
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int bcd_year = (kos_date & 0xFF);
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__buffertime.tm_mday = ((bcd_day & 0xF0)>>4)*10 + (bcd_day & 0x0F);
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__buffertime.tm_mon = ((bcd_mon & 0xF0)>>4)*10 + (bcd_mon & 0x0F) - 1;
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__buffertime.tm_year = ((bcd_year & 0xF0)>>4)*10 + (bcd_year & 0x0F) + 100;
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__buffertime.tm_wday = __buffertime.tm_yday = __buffertime.tm_isdst = -1; /* temporary */
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int bcd_sec = (kos_time >> 16);
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int bcd_min = ((kos_time & 0xFF00) >> 8);
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int bcd_hour = (kos_time & 0xFF);
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__buffertime.tm_sec = ((bcd_sec & 0xF0)>>4)*10 + (bcd_sec & 0x0F);
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__buffertime.tm_min = ((bcd_min & 0xF0)>>4)*10 + (bcd_min & 0x0F);
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__buffertime.tm_hour = ((bcd_hour & 0xF0)>>4)*10 + (bcd_hour & 0x0F);
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return &__buffertime;
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}
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time_t time (time_t* timer)
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{
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time_t t = mktime(localtime(0));
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if (timer) *timer = t;
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return t;
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}
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time_t mktime (struct tm * timeptr)
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{
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/*int y, m, d;
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time_t t;
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y = timeptr->tm_year + 1900;
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m = timeptr->tm_mon + 1;
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d = timeptr->tm_mday; // to -1 or not to -1?
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if (m < 3) { m += 12; y -= 1; }
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t = y * 365 + y / 4 + y /400 - y / 100; // years - > days
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t += 30 * m + 3 * (m + 1) / 5 + d; // add month days
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t -= 719561; // 01 jan 1970
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t *= 86400;
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t += 3600 * timeptr->tm_hour + 60 * timeptr->tm_min + timeptr->tm_sec;
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return t;*/
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int utcdiff = -3;
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const int mon_days [] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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unsigned long int tyears, tdays, leaps, utc_hrs;
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int i;
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tyears = timeptr->tm_year - 70 ;// tm->tm_year is from 1900.
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leaps = (tyears + 2) / 4; // no of next two lines until year 2100.
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i = (timeptr->tm_year - 100) / 100;
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leaps -= ( (i/4)*3 + i%4 );
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tdays = 0;
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for (i=0; i < timeptr->tm_mon; i++) tdays += mon_days[i];
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tdays += timeptr->tm_mday-1; // days of month passed.
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tdays = tdays + (tyears * 365) + leaps;
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utc_hrs = timeptr->tm_hour + utcdiff; // for your time zone.
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return (tdays * 86400) + (utc_hrs * 3600) + (timeptr->tm_min * 60) + timeptr->tm_sec;
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}
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double difftime (time_t end, time_t beginning)
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{
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return end - beginning;
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}
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