forked from Mirrors/wine-wine
Implementation of SystemTimeToTzSpecificLocalTime() and
TzSpecificLocalTimeToSystemTime().oldstable
Martin Fuchs
Alexandre Julliard
parent
7df7cdb6e2
commit
09746293f3
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@ -819,6 +819,7 @@
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@ stub Toolhelp32ReadProcessMemory
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@ stdcall TransactNamedPipe(long ptr long ptr long ptr ptr) TransactNamedPipe
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@ stdcall TransmitCommChar(long long) TransmitCommChar
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@ stdcall TzSpecificLocalTimeToSystemTime(ptr ptr ptr) TzSpecificLocalTimeToSystemTime
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@ stdcall UTRegister(long str str str ptr ptr ptr) UTRegister
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@ stdcall UTUnRegister(long) UTUnRegister
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@ stdcall UnMapLS(long) UnMapLS
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@ -165,6 +165,181 @@ BOOL WINAPI SetTimeZoneInformation(
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}
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/***********************************************************************
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* _DayLightCompareDate
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*
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* Compares two dates without looking at the year
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*
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* RETURNS
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*
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* -1 if date < compareDate
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* 0 if date == compareDate
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* 1 if date > compareDate
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* -2 if an error occures
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*/
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static int _DayLightCompareDate(
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const LPSYSTEMTIME date, /* [in] The date to compare. */
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const LPSYSTEMTIME compareDate) /* [in] The daylight saving begin or end date */
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{
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int limit_day;
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if (compareDate->wYear != 0)
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{
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if (date->wMonth < compareDate->wMonth)
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return -1; /* We are in a year before the date limit. */
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if (date->wMonth > compareDate->wMonth)
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return 1; /* We are in a year after the date limit. */
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}
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if (date->wMonth < compareDate->wMonth)
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return -1; /* We are in a month before the date limit. */
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if (date->wMonth > compareDate->wMonth)
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return 1; /* We are in a month after the date limit. */
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if (compareDate->wDayOfWeek <= 6)
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{
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SYSTEMTIME tmp;
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FILETIME tmp_ft;
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/* compareDate->wDay is interpreted as number of the week in the month. */
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/* 5 means: the last week in the month */
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int weekofmonth = compareDate->wDay;
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/* calculate day of week for the first day in the month */
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memcpy(&tmp, date, sizeof(SYSTEMTIME));
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tmp.wDay = 1;
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tmp.wDayOfWeek = -1;
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if (weekofmonth == 5)
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{
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/* Go to the beginning of the next month. */
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if (++tmp.wMonth > 12)
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{
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tmp.wMonth = 1;
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++tmp.wYear;
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}
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}
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if (!SystemTimeToFileTime(&tmp, &tmp_ft))
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return -2;
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if (weekofmonth == 5)
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{
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LONGLONG t, one_day;
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t = tmp_ft.dwHighDateTime;
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t <<= 32;
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t += (UINT)tmp_ft.dwLowDateTime;
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/* substract one day */
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one_day = 24*60*60;
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one_day *= 10000000;
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t -= one_day;
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tmp_ft.dwLowDateTime = (UINT)t;
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tmp_ft.dwHighDateTime = (UINT)(t >> 32);
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}
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if (!FileTimeToSystemTime(&tmp_ft, &tmp))
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return -2;
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if (weekofmonth == 5)
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{
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/* calculate the last matching day of the week in this month */
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int dif = tmp.wDayOfWeek - compareDate->wDayOfWeek;
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if (dif < 0)
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dif += 7;
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limit_day = tmp.wDay - dif;
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}
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else
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{
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/* calulcate the matching day of the week in the given week */
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int dif = compareDate->wDayOfWeek - tmp.wDayOfWeek;
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if (dif < 0)
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dif += 7;
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limit_day = tmp.wDay + 7*(weekofmonth-1) + dif;
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}
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}
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else
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{
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limit_day = compareDate->wDay;
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}
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if (date->wDay < limit_day)
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return -1;
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if (date->wDay > limit_day)
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return 1;
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return 0; /* date is equal to the date limit. */
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}
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/***********************************************************************
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* _GetTimezoneBias
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*
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* Calculates the local time bias for a given time zone
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*
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* RETURNS
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*
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* Returns TRUE when the time zone bias was calculated.
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*/
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static BOOL _GetTimezoneBias(
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const LPTIME_ZONE_INFORMATION lpTimeZoneInformation, /* [in] The time zone data. */
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LPSYSTEMTIME lpSystemTime, /* [in] The system time. */
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LONG* pBias) /* [out] The calulated bias in minutes */
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{
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int ret;
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BOOL beforedaylightsaving, afterdaylightsaving;
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BOOL daylightsaving = FALSE;
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LONG bias = lpTimeZoneInformation->Bias;
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if (lpTimeZoneInformation->DaylightDate.wMonth != 0)
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{
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if (lpTimeZoneInformation->StandardDate.wMonth == 0 ||
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lpTimeZoneInformation->StandardDate.wDay<1 ||
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lpTimeZoneInformation->StandardDate.wDay>5 ||
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lpTimeZoneInformation->DaylightDate.wDay<1 ||
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lpTimeZoneInformation->DaylightDate.wDay>5)
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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return FALSE;
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}
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/* check for daylight saving */
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ret = _DayLightCompareDate(lpSystemTime, &lpTimeZoneInformation->StandardDate);
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if (ret == -2)
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return FALSE;
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beforedaylightsaving = ret < 0;
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_DayLightCompareDate(lpSystemTime, &lpTimeZoneInformation->DaylightDate);
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if (ret == -2)
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return FALSE;
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afterdaylightsaving = ret >= 0;
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if (!beforedaylightsaving && !afterdaylightsaving)
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daylightsaving = TRUE;
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}
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if (daylightsaving)
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bias += lpTimeZoneInformation->DaylightBias;
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else if (lpTimeZoneInformation->StandardDate.wMonth != 0)
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bias += lpTimeZoneInformation->StandardBias;
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*pBias = bias;
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return TRUE;
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}
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/***********************************************************************
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* SystemTimeToTzSpecificLocalTime (KERNEL32.@)
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*
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@ -173,22 +348,102 @@ BOOL WINAPI SetTimeZoneInformation(
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* RETURNS
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*
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* Returns true when the local time was calculated.
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* Returns TRUE when the local time was calculated.
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*
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* BUGS
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*
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* Does not handle daylight savings time adjustments correctly.
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*/
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BOOL WINAPI SystemTimeToTzSpecificLocalTime(
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LPTIME_ZONE_INFORMATION lpTimeZoneInformation, /* [in] The desired time zone. */
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LPSYSTEMTIME lpUniversalTime, /* [in] The utc time to base local time on. */
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LPSYSTEMTIME lpLocalTime) /* [out] The local time in the time zone. */
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{
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FIXME(":stub\n");
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SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
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return FALSE;
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FILETIME ft;
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LONG lBias;
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LONGLONG t, bias;
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TIME_ZONE_INFORMATION tzinfo;
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if (lpTimeZoneInformation != NULL)
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{
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memcpy(&tzinfo, lpTimeZoneInformation, sizeof(TIME_ZONE_INFORMATION));
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}
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else
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{
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if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
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return FALSE;
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}
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if (!SystemTimeToFileTime(lpUniversalTime, &ft))
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return FALSE;
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t = ft.dwHighDateTime;
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t <<= 32;
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t += (UINT)ft.dwLowDateTime;
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if (!_GetTimezoneBias(&tzinfo, lpUniversalTime, &lBias))
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return FALSE;
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bias = lBias * 600000000; /* 60 seconds per minute, 100000 [100-nanoseconds-ticks] per second */
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t += bias;
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ft.dwLowDateTime = (UINT)t;
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ft.dwHighDateTime = (UINT)(t >> 32);
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return FileTimeToSystemTime(&ft, lpLocalTime);
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}
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/***********************************************************************
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* TzSpecificLocalTimeToSystemTime (KERNEL32.@)
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*
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* Converts a local time to a time in Coordinated Universal Time (UTC).
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*
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* RETURNS
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*
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* Returns TRUE when the utc time was calculated.
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*/
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BOOL WINAPI TzSpecificLocalTimeToSystemTime(
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LPTIME_ZONE_INFORMATION lpTimeZoneInformation, /* [in] The desired time zone. */
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LPSYSTEMTIME lpLocalTime, /* [in] The local time. */
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LPSYSTEMTIME lpUniversalTime) /* [out] The calculated utc time. */
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{
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FILETIME ft;
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LONG lBias;
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LONGLONG t, bias;
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TIME_ZONE_INFORMATION tzinfo;
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if (lpTimeZoneInformation != NULL)
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{
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memcpy(&tzinfo, lpTimeZoneInformation, sizeof(TIME_ZONE_INFORMATION));
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}
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else
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{
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if (GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_INVALID)
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return FALSE;
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}
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if (!SystemTimeToFileTime(lpLocalTime, &ft))
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return FALSE;
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t = ft.dwHighDateTime;
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t <<= 32;
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t += (UINT)ft.dwLowDateTime;
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if (!_GetTimezoneBias(&tzinfo, lpUniversalTime, &lBias))
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return FALSE;
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bias = lBias * 600000000; /* 60 seconds per minute, 100000 [100-nanoseconds-ticks] per second */
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t -= bias;
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ft.dwLowDateTime = (UINT)t;
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ft.dwHighDateTime = (UINT)(t >> 32);
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return FileTimeToSystemTime(&ft, lpUniversalTime);
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}
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/***********************************************************************
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* GetSystemTimeAsFileTime (KERNEL32.@)
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*
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