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#include "timeutil.h"
/* Originally based on code found in the Ruby WinCE support, which
had the following notice: */
/* start original header */
/***************************************************************
time.c
author : uema2
date : Nov 30, 2002
You can freely use, copy, modify, and redistribute
the whole contents.
***************************************************************/
/* end original header */
/* Note: The original filename was: wince/time_wce.c */
/* Adapted to mingw32ce by Pedro Alves <pedro_alves@portugalmail.pt>
10 Feb 2007 - Initial revision. */
#define DELTA_EPOCH 116444736000000000LL
#if 0
how_to_calc_delta_epoch ()
{
FILETIME f1601, f1970;
__FILETIME_from_Year (1601, &f1601);
__FILETIME_from_Year (1970, &f1970);
DELTA_EPOCH = __FILETIME_to_ll (&f1970) - __FILETIME_to_ll (&f1601);
}
#endif
long long
__FILETIME_to_ll (const FILETIME *f)
{
long long t;
t = (long long)f->dwHighDateTime << 32;
t |= f->dwLowDateTime;
return t;
}
void
__ll_to_FILETIME (long long t, FILETIME* f)
{
f->dwHighDateTime = (DWORD)((t >> 32) & 0x00000000FFFFFFFF);
f->dwLowDateTime = (DWORD)(t & 0x00000000FFFFFFFF);
}
void
__tm_to_SYSTEMTIME (struct tm *t, SYSTEMTIME *s)
{
s->wYear = t->tm_year + 1900;
s->wMonth = t->tm_mon + 1;
s->wDayOfWeek = t->tm_wday;
s->wDay = t->tm_mday;
s->wHour = t->tm_hour;
s->wMinute = t->tm_min;
s->wSecond = t->tm_sec;
s->wMilliseconds = 0;
}
static void
__FILETIME_from_Year (WORD year, FILETIME *f)
{
SYSTEMTIME s = {0};
s.wYear = year;
s.wMonth = 1;
s.wDayOfWeek = 1;
s.wDay = 1;
SystemTimeToFileTime (&s, f);
}
static int
__Yday_from_SYSTEMTIME (const SYSTEMTIME *s)
{
long long t;
FILETIME f1, f2;
__FILETIME_from_Year (s->wYear, &f1);
SystemTimeToFileTime (s, &f2);
t = __FILETIME_to_ll (&f2) - __FILETIME_to_ll (&f1);
return ((t / _onesec_in100ns) / (60 * 60 * 24));
}
void
__SYSTEMTIME_to_tm (SYSTEMTIME *s, struct tm *tm)
{
tm->tm_year = s->wYear - 1900;
tm->tm_mon = s->wMonth- 1;
tm->tm_wday = s->wDayOfWeek;
tm->tm_mday = s->wDay;
tm->tm_yday = __Yday_from_SYSTEMTIME (s);
tm->tm_hour = s->wHour;
tm->tm_min = s->wMinute;
tm->tm_sec = s->wSecond;
tm->tm_isdst = 0;
}
time_t
__FILETIME_to_time_t (const FILETIME* f)
{
long long t;
t = __FILETIME_to_ll (f);
t -= DELTA_EPOCH;
return (time_t)(t / _onesec_in100ns);
}
void
__time_t_to_FILETIME (time_t t, FILETIME *f)
{
long long time;
time = t;
time *= _onesec_in100ns;
time += DELTA_EPOCH;
__ll_to_FILETIME (time, f);
}
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