#include <time.h>
#include <acess/sys.h>
#include <string.h>
+#include "timeconv.h"
+#include <errno.h>
+#include <stdio.h> // sprintf
+
+#define UNIX_TO_2K ((30*365*3600*24) + (7*3600*24)) //Normal years + leap years
clock_t clock(void)
{
return _SysTimestamp();
}
+time_t mktime(struct tm *timeptr)
+{
+ time_t ret = seconds_since_y2k(
+ timeptr->tm_year - 2000,
+ timeptr->tm_mon,
+ timeptr->tm_mday,
+ timeptr->tm_hour,
+ timeptr->tm_min,
+ timeptr->tm_sec
+ );
+ if( ret == 0 && errno ) {
+ // Bad date
+ }
+ ret += UNIX_TO_2K;
+
+ return ret;
+}
+
time_t time(time_t *t)
{
time_t ret = _SysTimestamp() / 1000;
return ret;
}
+//! Convert the time structure into a string of form 'Sun Sep 16 01:03:52 1973\n\0'
+char *asctime(const struct tm *timeptr)
+{
+ static char staticbuf[sizeof("Sun Sep 16 01:03:52 1973\n")];
+ return asctime_r(timeptr, staticbuf);
+}
+char *asctime_r(const struct tm *timeptr, char *buf)
+{
+ const char *WDAYS[] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat","Sun"};
+ const char *MONS[] = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
+ sprintf(buf,
+ "%s %s %i %02i:%02i:%02i %4i\n",
+ WDAYS[timeptr->tm_wday],
+ MONS[timeptr->tm_mon],
+ timeptr->tm_mday,
+ timeptr->tm_hour,
+ timeptr->tm_min,
+ timeptr->tm_sec,
+ timeptr->tm_year
+ );
+ return buf;
+}
+
+//! asctime(localtime(timer))
+char *ctime(const time_t *timer)
+{
+ struct tm time_buf;
+ localtime_r(timer, &time_buf);
+ return asctime(&time_buf);
+}
+extern char *ctime_r(const time_t *timer, char *buf)
+{
+ struct tm time_buf;
+ localtime_r(timer, &time_buf);
+ return asctime_r(&time_buf, buf);
+}
+
+//! Convert \a timter into UTC
+struct tm *gmtime(const time_t *timer)
+{
+ // Ignore UTC
+ return localtime(timer);
+}
+struct tm *gmtime_r(const time_t *timer, struct tm *result)
+{
+ return localtime_r(timer, result);
+}
+
static struct tm static_tm;
struct tm *localtime(const time_t *timer)
{
- struct tm *ret = &static_tm;
+ return localtime_r(timer, &static_tm);
- // TODO: This breaks on negative timestamps
-
- int64_t day = *timer / (1000*60*60*24);
- int64_t iday = *timer % (1000*60*60*24);
+}
+struct tm *localtime_r(const time_t *timer, struct tm *ret)
+{
+ // Hours, Mins, Seconds
+ int64_t days = get_days_since_y2k(*timer, &ret->tm_hour, &ret->tm_min, &ret->tm_sec);
+
+ // Week day
+ ret->tm_wday = (days + 6) % 7; // Sun = 0, 1 Jan 2000 was Sat (6)
+
+ // Year and Day of Year
+ bool is_ly;
+ ret->tm_year = 2000 + get_years_since_y2k(days, &is_ly, &ret->tm_yday);
- ret->tm_sec = (iday / 1000) % 60;;
- ret->tm_min = (iday / (1000*60)) % 60;
- ret->tm_hour = (iday / (1000*60*60));
- ret->tm_year = 0;
- ret->tm_mon = 0;
- ret->tm_mday = 0;
- ret->tm_wday = (day + 6) % 7; // 1 Jan 2000 was a saturday
- ret->tm_yday = 0;
+ // Month and Day of Month
+ get_month_day(ret->tm_yday, is_ly, &ret->tm_mon, &ret->tm_mday);
+ ret->tm_mon --;
+
ret->tm_isdst = 0; // Fuck DST
+
return ret;
}