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/***************************************************************
time.c
author : uema2
date : Nov 30, 2002
You can freely use, copy, modify, and redistribute
the whole contents.
***************************************************************/
/*#define __SCRATCH_TIMEC_DEBUG__ */
#include <windows.h>
#include <tchar.h>
#include <time.h>
/* globals */
const __int64 _onesec_in100ns = (__int64)10000000;
int timezone, _timezone, altzone;
int daylight;
char *tzname[2];
/* __int64 <--> FILETIME */
static __int64 wce_FILETIME2int64(FILETIME f)
{
__int64 t;
t = f.dwHighDateTime;
t <<= 32;
t |= f.dwLowDateTime;
return t;
}
static FILETIME wce_int642FILETIME(__int64 t)
{
FILETIME f;
f.dwHighDateTime = (DWORD)((t >> 32) & 0x00000000FFFFFFFF);
f.dwLowDateTime = (DWORD)( t & 0x00000000FFFFFFFF);
return f;
}
/* FILETIME utility */
static FILETIME wce_getFILETIMEFromYear(WORD year)
{
SYSTEMTIME s={0};
FILETIME f;
s.wYear = year;
s.wMonth = 1;
s.wDayOfWeek = 1;
s.wDay = 1;
SystemTimeToFileTime( &s, &f );
return f;
}
static time_t wce_getYdayFromSYSTEMTIME(const SYSTEMTIME* s)
{
__int64 t;
FILETIME f1, f2;
f1 = wce_getFILETIMEFromYear( s->wYear );
SystemTimeToFileTime( s, &f2 );
t = wce_FILETIME2int64(f2)-wce_FILETIME2int64(f1);
return (time_t)((t/_onesec_in100ns)/(60*60*24));
}
/* tm <--> SYSTEMTIME */
static SYSTEMTIME wce_tm2SYSTEMTIME(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;
return s;
}
static struct tm wce_SYSTEMTIME2tm(SYSTEMTIME *s)
{
struct tm t;
t.tm_year = s->wYear - 1900;
t.tm_mon = s->wMonth- 1;
t.tm_wday = s->wDayOfWeek;
t.tm_mday = s->wDay;
t.tm_yday = wce_getYdayFromSYSTEMTIME(s);
t.tm_hour = s->wHour;
t.tm_min = s->wMinute;
t.tm_sec = s->wSecond;
t.tm_isdst = 0;
return t;
}
/* FILETIME <--> time_t */
time_t wce_FILETIME2time_t(const FILETIME* f)
{
FILETIME f1601, f1970;
__int64 t, offset;
f1601 = wce_getFILETIMEFromYear(1601);
f1970 = wce_getFILETIMEFromYear(1970);
offset = wce_FILETIME2int64(f1970) - wce_FILETIME2int64(f1601);
t = wce_FILETIME2int64(*f);
t -= offset;
return (time_t)(t / _onesec_in100ns);
}
FILETIME wce_time_t2FILETIME(const time_t t)
{
FILETIME f, f1970;
__int64 time;
f1970 = wce_getFILETIMEFromYear(1970);
time = t;
time *= _onesec_in100ns;
time += wce_FILETIME2int64(f1970);
f = wce_int642FILETIME(time);
return f;
}
/* time.h difinition */
time_t time( time_t *timer )
{
SYSTEMTIME s;
FILETIME f;
if( timer==NULL ) return 0;
GetSystemTime( &s );
SystemTimeToFileTime( &s, &f );
*timer = wce_FILETIME2time_t(&f);
return *timer;
}
struct tm *localtime( const time_t *timer )
{
SYSTEMTIME ss, ls, s;
FILETIME sf, lf, f;
__int64 t, diff;
static struct tm tms;
GetSystemTime(&ss);
GetLocalTime(&ls);
SystemTimeToFileTime( &ss, &sf );
SystemTimeToFileTime( &ls, &lf );
diff = wce_FILETIME2int64(sf) - wce_FILETIME2int64(lf);
f = wce_time_t2FILETIME(*timer);
t = wce_FILETIME2int64(f) - diff;
f = wce_int642FILETIME(t);
FileTimeToSystemTime( &f, &s );
tms = wce_SYSTEMTIME2tm(&s);
return &tms;
}
time_t mktime(struct tm* pt)
{
SYSTEMTIME ss, ls, s;
FILETIME sf, lf, f;
__int64 diff;
GetSystemTime(&ss);
GetLocalTime(&ls);
SystemTimeToFileTime( &ss, &sf );
SystemTimeToFileTime( &ls, &lf );
diff = (wce_FILETIME2int64(lf)-wce_FILETIME2int64(sf))/_onesec_in100ns;
s = wce_tm2SYSTEMTIME(pt);
SystemTimeToFileTime( &s, &f );
return wce_FILETIME2time_t(&f) - (time_t)diff;
}
struct tm *gmtime(const time_t *t)
{
FILETIME f;
SYSTEMTIME s;
static struct tm tms;
f = wce_time_t2FILETIME(*t);
FileTimeToSystemTime(&f, &s);
tms = wce_SYSTEMTIME2tm(&s);
return &tms;
}
char* ctime( const time_t *t )
{
// Wed Jan 02 02:03:55 1980\n\0
static char buf[30]={0};
char week[] = "Sun Mon Tue Wed Thr Fri Sat ";
char month[]= "Jan Feb Mar Apl May Jun Jul Aug Sep Oct Nov Dec ";
struct tm tms;
tms = *localtime(t);
strncpy( buf, week+tms.tm_wday*4, 4 );
strncpy( buf+4, month+tms.tm_mon*4, 4 );
sprintf( buf+8, "%02d ", tms.tm_mday );
sprintf( buf+11, "%02d:%02d:%02d %d\n",
tms.tm_hour, tms.tm_min, tms.tm_sec, tms.tm_year+1900 );
return buf;
}
char *asctime(const struct tm *pt)
{
static char buf[30]={0};
char week[] = "Sun Mon Tue Wed Thr Fri Sat ";
char month[]= "Jan Feb Mar Apl May Jun Jul Aug Sep Oct Nov Dec ";
strncpy( buf, week+pt->tm_wday*4, 4 );
strncpy( buf+4, month+pt->tm_mon*4, 4 );
sprintf( buf+8, "%02d ", pt->tm_mday );
sprintf( buf+11, "%02d:%02d:%02d %d\n",
pt->tm_hour, pt->tm_min, pt->tm_sec, pt->tm_year+1900 );
return buf;
}
void tzset()
{
daylight = 1;
_timezone = 28800;
timezone = 28800;
}
int clock(void)
{
return 1;
}
//---------------------------------------------------------------
#ifdef __SCRATCH_TIMEC_DEBUG__
int main()
{
time_t t1, t2;
struct tm tm1, tm2;
time( &t1 );
tm1 = *localtime(&t1);
t1 = mktime(&tm1);
tm1 = *gmtime(&t1);
_time( &t2 );
tm2 = *_localtime(&t2);
t2 = _mktime(&tm2);
tm2 = *_gmtime(&t2);
// time, mktime
if( t1==t2 )
OutputDebugString( "ok\n" );
else
{
static char buf[128];
wsprintf( buf, "ng : %d, %d\n", t1, t2 );
OutputDebugString( buf );
}
// localtime, gmtime
if( 0==memcmp( &tm1, &tm2, sizeof(struct tm) ) )
OutputDebugString( "ok\n" );
else
OutputDebugString( "ng\n" );
// ctime
OutputDebugString( ctime(&t1) );
OutputDebugString( _ctime(&t2) );
// asctime
OutputDebugString( asctime(&tm1) );
OutputDebugString( _asctime(&tm2) );
return 0;
}
#endif
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