mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
400 lines
9.7 KiB
400 lines
9.7 KiB
/*++
|
|
|
|
Copyright (C) 1996-2001 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
WBEMTIME.CPP
|
|
|
|
Abstract:
|
|
|
|
Time helper
|
|
|
|
History:
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
#include "CWbemTime.h"
|
|
#include <stdio.h>
|
|
|
|
static void i64ToFileTime( const __int64 *p64, FILETIME *pft )
|
|
{
|
|
__int64 iTemp = *p64;
|
|
pft->dwLowDateTime = (DWORD)iTemp;
|
|
iTemp = iTemp >> 32;
|
|
pft->dwHighDateTime = (DWORD)iTemp;
|
|
}
|
|
|
|
static int CompareSYSTEMTIME(const SYSTEMTIME *pst1, const SYSTEMTIME *pst2)
|
|
{
|
|
FILETIME ft1, ft2;
|
|
|
|
SystemTimeToFileTime(pst1, &ft1);
|
|
SystemTimeToFileTime(pst2, &ft2);
|
|
|
|
return CompareFileTime(&ft1, &ft2);
|
|
}
|
|
|
|
// This function is used to convert the relative values that come
|
|
// back from GetTimeZoneInformation into an actual date for the year
|
|
// in question. The system time structure that is passed in is updated
|
|
// to contain the absolute values.
|
|
static void DayInMonthToAbsolute(SYSTEMTIME *pst, const WORD wYear)
|
|
{
|
|
const static int _lpdays[] = {
|
|
-1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365
|
|
};
|
|
|
|
const static int _days[] = {
|
|
-1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364
|
|
};
|
|
|
|
SHORT shYearDay;
|
|
|
|
// If this is not 0, this is not a relative date
|
|
if (pst->wYear == 0)
|
|
{
|
|
// Was that year a leap year?
|
|
BOOL bLeap = ( (( wYear % 400) == 0) || ((( wYear % 4) == 0) && (( wYear % 100) != 0)));
|
|
|
|
// Figure out the day of the year for the first day of the month in question
|
|
if (bLeap)
|
|
shYearDay = 1 + _lpdays[pst->wMonth - 1];
|
|
else
|
|
shYearDay = 1 + _days[pst->wMonth - 1];
|
|
|
|
// Now, figure out how many leap days there have been since 1/1/1601
|
|
WORD yc = wYear - 1601;
|
|
WORD y4 = (yc) / 4;
|
|
WORD y100 = (yc) / 100;
|
|
WORD y400 = (yc) / 400;
|
|
|
|
// This will tell us the day of the week for the first day of the month in question.
|
|
// The '1 +' reflects the fact that 1/1/1601 was a monday (figures). You might ask,
|
|
// 'why do we care what day of the week this is?' Well, I'll tell you. The way
|
|
// daylight savings time is defined is with things like 'the last sunday of the month
|
|
// of october.' Kinda helps to know what day that is.
|
|
SHORT monthdow = (1 + (yc * 365 + y4 + y400 - y100) + shYearDay) % 7;
|
|
|
|
if ( monthdow < pst->wDayOfWeek )
|
|
shYearDay += (pst->wDayOfWeek - monthdow) + (pst->wDay - 1) * 7;
|
|
else
|
|
shYearDay += (pst->wDayOfWeek - monthdow) + pst->wDay * 7;
|
|
|
|
/*
|
|
* May have to adjust the calculation above if week == 5 (meaning
|
|
* the last instance of the day in the month). Check if yearday falls
|
|
* beyond month and adjust accordingly.
|
|
*/
|
|
if ( (pst->wDay == 5) &&
|
|
(shYearDay > (bLeap ? _lpdays[pst->wMonth] :
|
|
_days[pst->wMonth])) )
|
|
{
|
|
shYearDay -= 7;
|
|
}
|
|
|
|
// Now update the structure.
|
|
pst->wYear = wYear;
|
|
pst->wDay = shYearDay - (bLeap ? _lpdays[pst->wMonth - 1] :
|
|
_days[pst->wMonth - 1]);
|
|
}
|
|
|
|
}
|
|
|
|
CWbemTime CWbemTime::GetCurrentTime()
|
|
{
|
|
SYSTEMTIME st;
|
|
::GetSystemTime(&st);
|
|
|
|
CWbemTime CurrentTime;
|
|
CurrentTime.SetSystemTime(st);
|
|
return CurrentTime;
|
|
}
|
|
|
|
BOOL CWbemTime::SetSystemTime(const SYSTEMTIME& st)
|
|
{
|
|
FILETIME ft;
|
|
if(!SystemTimeToFileTime(&st, &ft))
|
|
return FALSE;
|
|
|
|
__int64 i64Time = ft.dwHighDateTime;
|
|
i64Time = (i64Time << 32) + ft.dwLowDateTime;
|
|
Set100nss(i64Time);
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CWbemTime::SetFileTime(const FILETIME& ft)
|
|
{
|
|
__int64 i64Time = ft.dwHighDateTime;
|
|
i64Time = (i64Time << 32) + ft.dwLowDateTime;
|
|
Set100nss(i64Time);
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CWbemTime::GetSYSTEMTIME(SYSTEMTIME * pst) const
|
|
{
|
|
|
|
FILETIME t_ft;
|
|
|
|
if (GetFILETIME(&t_ft))
|
|
{
|
|
if (!FileTimeToSystemTime(&t_ft, pst))
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL CWbemTime::GetFILETIME(FILETIME * pft) const
|
|
{
|
|
if ( pft == NULL )
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
i64ToFileTime( &m_i64, pft );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
CWbemInterval CWbemTime::RemainsUntil(const CWbemTime& Other) const
|
|
{
|
|
__int64 i64Diff = Other.m_i64 - m_i64;
|
|
if(i64Diff < 0) i64Diff = 0;
|
|
|
|
return CWbemInterval((DWORD)(i64Diff/10000));
|
|
}
|
|
|
|
CWbemTime CWbemTime::operator+(const CWbemInterval& ToAdd) const
|
|
{
|
|
return CWbemTime(m_i64 + 10000*(__int64)ToAdd.GetMilliseconds());
|
|
}
|
|
|
|
BOOL CWbemTime::SetDMTF(LPCWSTR wszText)
|
|
{
|
|
if(wcslen(wszText) != 25)
|
|
return FALSE;
|
|
|
|
// Parse it
|
|
// ========
|
|
|
|
int nYear, nMonth, nDay, nHour, nMinute, nSecond, nMicro, nOffset;
|
|
WCHAR wchSep;
|
|
|
|
int nRes = swscanf(wszText, L"%4d%2d%2d%2d%2d%2d.%6d%c%3d",
|
|
&nYear, &nMonth, &nDay, &nHour, &nMinute, &nSecond, &nMicro,
|
|
&wchSep, &nOffset);
|
|
if(nRes != 9)
|
|
return FALSE;
|
|
|
|
int nSign;
|
|
if(wchSep == L'+')
|
|
nSign = -1;
|
|
else if(wchSep == L'-')
|
|
nSign = 1;
|
|
else if(wchSep == L':')
|
|
nSign = 0;
|
|
else
|
|
return FALSE;
|
|
|
|
// Convert it to SYSTEMTIME
|
|
// ========================
|
|
|
|
SYSTEMTIME st;
|
|
st.wYear = (WORD)nYear;
|
|
st.wMonth = (WORD)nMonth;
|
|
st.wDay = (WORD)nDay;
|
|
st.wHour = (WORD)nHour;
|
|
st.wMinute = (WORD)nMinute;
|
|
st.wSecond = (WORD)nSecond;
|
|
st.wMilliseconds = nMicro / 1000;
|
|
|
|
// NOTE: ignored timezone for now
|
|
// ==============================
|
|
|
|
if(!SetSystemTime(st))
|
|
return FALSE;
|
|
|
|
// Now adjust for the offset
|
|
// =========================
|
|
|
|
m_i64 += (__int64)nSign * (__int64)nOffset * 60 * 10000000;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
LONG CWbemTime::GetLocalOffsetForDate(const SYSTEMTIME *pst)
|
|
{
|
|
TIME_ZONE_INFORMATION tzTime;
|
|
DWORD dwRes = GetTimeZoneInformation(&tzTime);
|
|
LONG lRes = 0xffffffff;
|
|
|
|
switch (dwRes)
|
|
{
|
|
case TIME_ZONE_ID_UNKNOWN:
|
|
{
|
|
// Read tz, but no dst defined in this zone
|
|
lRes = tzTime.Bias * -1;
|
|
break;
|
|
}
|
|
case TIME_ZONE_ID_STANDARD:
|
|
case TIME_ZONE_ID_DAYLIGHT:
|
|
{
|
|
|
|
// Convert the relative dates to absolute dates
|
|
DayInMonthToAbsolute(&tzTime.DaylightDate, pst->wYear);
|
|
DayInMonthToAbsolute(&tzTime.StandardDate, pst->wYear);
|
|
|
|
if ( CompareSYSTEMTIME(&tzTime.DaylightDate, &tzTime.StandardDate) < 0 )
|
|
{
|
|
/*
|
|
* Northern hemisphere ordering
|
|
*/
|
|
if ( CompareSYSTEMTIME(pst, &tzTime.DaylightDate) < 0 || CompareSYSTEMTIME(pst, &tzTime.StandardDate) > 0)
|
|
{
|
|
lRes = tzTime.Bias * -1;
|
|
}
|
|
else
|
|
{
|
|
lRes = (tzTime.Bias + tzTime.DaylightBias) * -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Southern hemisphere ordering
|
|
*/
|
|
if ( CompareSYSTEMTIME(pst, &tzTime.StandardDate) < 0 || CompareSYSTEMTIME(pst, &tzTime.DaylightDate) > 0)
|
|
{
|
|
lRes = (tzTime.Bias + tzTime.DaylightBias) * -1;
|
|
}
|
|
else
|
|
{
|
|
lRes = tzTime.Bias * -1;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
case TIME_ZONE_ID_INVALID:
|
|
default:
|
|
{
|
|
// Can't read the timezone info
|
|
//ASSERT_BREAK(BAD_TIMEZONE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return lRes;
|
|
}
|
|
|
|
BOOL CWbemTime::GetDMTF( BOOL bLocal, DWORD dwBuffLen, LPWSTR pwszBuff )
|
|
{
|
|
|
|
SYSTEMTIME t_Systime;
|
|
wchar_t chsign = L'-';
|
|
int offset = 0;
|
|
|
|
// Need to Localize the offset
|
|
if ( dwBuffLen < WBEMTIME_LENGTH + 1 )
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
// If the date to be converted is within 12 hours of
|
|
// 1/1/1601, return the greenwich time
|
|
ULONGLONG t_ConversionZone = 12L * 60L * 60L ;
|
|
t_ConversionZone = t_ConversionZone * 10000000L ;
|
|
if ( !bLocal || ( m_i64 < t_ConversionZone ) )
|
|
{
|
|
if(!GetSYSTEMTIME(&t_Systime))
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (GetSYSTEMTIME(&t_Systime))
|
|
{
|
|
offset = GetLocalOffsetForDate(&t_Systime);
|
|
|
|
CWbemTime wt;
|
|
if (offset >= 0)
|
|
{
|
|
chsign = '+';
|
|
wt = *this + CWbemTimeSpan(0, 0, offset, 0);
|
|
}
|
|
else
|
|
{
|
|
offset *= -1;
|
|
wt = *this - CWbemTimeSpan(0, 0, offset, 0);
|
|
}
|
|
wt.GetSYSTEMTIME(&t_Systime);
|
|
}
|
|
else
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
LONGLONG tmpMicros = m_i64%10000000;
|
|
LONG micros = (LONG)(tmpMicros / 10);
|
|
|
|
swprintf(
|
|
|
|
pwszBuff,
|
|
L"%04.4d%02.2d%02.2d%02.2d%02.2d%02.2d.%06.6d%c%03.3ld",
|
|
t_Systime.wYear,
|
|
t_Systime.wMonth,
|
|
t_Systime.wDay,
|
|
t_Systime.wHour,
|
|
t_Systime.wMinute,
|
|
t_Systime.wSecond,
|
|
micros,
|
|
chsign,
|
|
offset
|
|
);
|
|
|
|
return TRUE ;
|
|
|
|
}
|
|
|
|
CWbemTime CWbemTime::operator+(const CWbemTimeSpan &uAdd) const
|
|
{
|
|
CWbemTime ret;
|
|
ret.m_i64 = m_i64 + uAdd.m_Time;
|
|
|
|
return ret;
|
|
}
|
|
|
|
CWbemTime CWbemTime::operator-(const CWbemTimeSpan &uSub) const
|
|
{
|
|
CWbemTime ret;
|
|
ret.m_i64 = m_i64 - uSub.m_Time;
|
|
|
|
return ret;
|
|
}
|
|
|
|
CWbemTimeSpan::CWbemTimeSpan(int iDays, int iHours, int iMinutes, int iSeconds,
|
|
int iMSec, int iUSec, int iNSec)
|
|
{
|
|
m_Time = 0; //todo, check values!!!
|
|
m_Time += iSeconds;
|
|
m_Time += iMinutes * 60;
|
|
m_Time += iHours * 60 * 60;
|
|
m_Time += iDays * 24 * 60 * 60;
|
|
m_Time *= 10000000;
|
|
m_Time += iNSec / 100; // Nanoseconds
|
|
m_Time += iUSec*10; // Microseconds
|
|
m_Time += iMSec*10000; // Milliseconds
|
|
}
|
|
|