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wine-winehq
Commit d788e030 authored by Rein Klazes's avatar Rein Klazes Committed by Alexandre Julliard
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Fixed TzSpecificLocalTimeToSystemTime and

SystemTimeToTzSpecificLocalTime: - take the time of day into the calculation, so the bias is calculated correctly during the transition days; - the transition times are expressed as local time, not system time; - correct the daylight logic for use on the southern hemisphere; - beautify some LONGLONG arithmetic.
parent 6f17eee7
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Showing with 74 additions and 67 deletions
dlls/kernel/time.c
View file @ d788e030
......@@ -53,6 +53,11 @@ WINE_DEFAULT_DEBUG_CHANNEL(time);
#define SETTIME_MAX_ADJUST 120
#define CALINFO_MAX_YEAR 2029
#define LL2FILETIME( ll, pft )\
(pft)->dwLowDateTime = (UINT)(ll); \
(pft)->dwHighDateTime = (UINT)((ll) >> 32);
#define FILETIME2LL( pft, ll) \
ll = (((LONGLONG)((pft)->dwHighDateTime))<<32) + (pft)-> dwLowDateTime ;
/***********************************************************************
* SetLocalTime (KERNEL32.@)
......@@ -204,19 +209,11 @@ BOOL WINAPI SetTimeZoneInformation(
*/
static int _DayLightCompareDate(
const LPSYSTEMTIME date, /* [in] The date to compare. */
const LPSYSTEMTIME compareDate) /* [in] The daylight saving begin or end date */
const LPSYSTEMTIME date, /* [in] The local time to compare. */
const LPSYSTEMTIME compareDate) /* [in] The daylight saving begin
or end date */
{
int limit_day;
if (compareDate->wYear != 0)
{
if (date->wMonth < compareDate->wMonth)
return -1; /* We are in a year before the date limit. */
if (date->wMonth > compareDate->wMonth)
return 1; /* We are in a year after the date limit. */
}
int limit_day, dayinsecs;
if (date->wMonth < compareDate->wMonth)
return -1; /* We are in a month before the date limit. */
......@@ -229,8 +226,8 @@ static int _DayLightCompareDate(
SYSTEMTIME tmp;
FILETIME tmp_ft;
/* compareDate->wDay is interpreted as number of the week in the month. */
/* 5 means: the last week in the month */
/* compareDate->wDay is interpreted as number of the week in the month
* 5 means: the last week in the month */
int weekofmonth = compareDate->wDay;
/* calculate day of week for the first day in the month */
......@@ -253,19 +250,11 @@ static int _DayLightCompareDate(
if (weekofmonth == 5)
{
LONGLONG t, one_day;
t = tmp_ft.dwHighDateTime;
t <<= 32;
t += (UINT)tmp_ft.dwLowDateTime;
LONGLONG t;
FILETIME2LL( &tmp_ft, t)
/* subtract one day */
one_day = 24*60*60;
one_day *= 10000000;
t -= one_day;
tmp_ft.dwLowDateTime = (UINT)t;
tmp_ft.dwHighDateTime = (UINT)(t >> 32);
t -= (LONGLONG) 24*60*60*10000000;
LL2FILETIME( t, &tmp_ft);
}
if (!FileTimeToSystemTime(&tmp_ft, &tmp))
......@@ -295,13 +284,15 @@ static int _DayLightCompareDate(
limit_day = compareDate->wDay;
}
if (date->wDay < limit_day)
return -1;
if (date->wDay > limit_day)
return 1;
return 0; /* date is equal to the date limit. */
/* convert to seconds */
limit_day = ((limit_day * 24 + compareDate->wHour) * 60 +
compareDate->wMinute ) * 60;
dayinsecs = ((date->wDay * 24 + date->wHour) * 60 +
date->wMinute ) * 60 + date->wSecond;
/* and compare */
return dayinsecs < limit_day ? -1 :
dayinsecs > limit_day ? 1 :
0; /* date is equal to the date limit. */
}
......@@ -316,14 +307,21 @@ static int _DayLightCompareDate(
*/
static BOOL _GetTimezoneBias(
const LPTIME_ZONE_INFORMATION lpTimeZoneInformation, /* [in] The time zone data. */
LPSYSTEMTIME lpSystemTime, /* [in] The system time. */
LONG* pBias) /* [out] The calulated bias in minutes */
const LPTIME_ZONE_INFORMATION
lpTimeZoneInformation, /* [in] The time zone data. */
LPSYSTEMTIME lpSysOrLocalTime, /* [in] The system or local time. */
BOOL islocal, /* [in] it is local time */
LONG* pBias /* [out] The calulated bias in minutes */
)
{
int ret;
BOOL beforeStandardDate, afterDaylightDate;
BOOL daylightsaving = FALSE;
LONG bias = lpTimeZoneInformation->Bias;
FILETIME ft;
LONGLONG llTime = 0; /* initialized to prevent gcc complaining */
SYSTEMTIME stTemp;
LPSYSTEMTIME lpTime = lpSysOrLocalTime;
if (lpTimeZoneInformation->DaylightDate.wMonth != 0)
{
......@@ -337,20 +335,43 @@ static BOOL _GetTimezoneBias(
return FALSE;
}
if (!islocal) {
if (!SystemTimeToFileTime(lpSysOrLocalTime, &ft)) return -2;
FILETIME2LL( &ft, llTime );
llTime -= ( lpTimeZoneInformation->Bias +
lpTimeZoneInformation->DaylightBias ) * (LONGLONG)600000000;
LL2FILETIME( llTime, &ft)
FileTimeToSystemTime(&ft, &stTemp);
lpTime = &stTemp;
}
/* check for daylight saving */
ret = _DayLightCompareDate(lpSystemTime, &lpTimeZoneInformation->StandardDate);
ret = _DayLightCompareDate(lpTime, &lpTimeZoneInformation->StandardDate);
if (ret == -2)
return FALSE;
beforeStandardDate = ret < 0;
ret = _DayLightCompareDate(lpSystemTime, &lpTimeZoneInformation->DaylightDate);
if (!islocal) {
llTime -= ( lpTimeZoneInformation->StandardBias -
lpTimeZoneInformation->DaylightBias ) * (LONGLONG)600000000;
LL2FILETIME( llTime, &ft)
FileTimeToSystemTime(&ft, &stTemp);
lpTime = &stTemp;
}
ret = _DayLightCompareDate(lpTime, &lpTimeZoneInformation->DaylightDate);
if (ret == -2)
return FALSE;
afterDaylightDate = ret >= 0;
if (beforeStandardDate && afterDaylightDate)
if( lpTimeZoneInformation->DaylightDate.wMonth < /* Northern */
lpTimeZoneInformation->StandardDate.wMonth ) { /* hemisphere */
if( beforeStandardDate && afterDaylightDate )
daylightsaving = TRUE;
} else /* Down south */
if( beforeStandardDate || afterDaylightDate )
daylightsaving = TRUE;
}
......@@ -376,13 +397,14 @@ static BOOL _GetTimezoneBias(
*/
BOOL WINAPI SystemTimeToTzSpecificLocalTime(
LPTIME_ZONE_INFORMATION lpTimeZoneInformation, /* [in] The desired time zone. */
LPTIME_ZONE_INFORMATION
lpTimeZoneInformation, /* [in] The desired time zone. */
LPSYSTEMTIME lpUniversalTime, /* [in] The utc time to base local time on. */
LPSYSTEMTIME lpLocalTime) /* [out] The local time in the time zone. */
{
FILETIME ft;
LONG lBias;
LONGLONG t, bias;
LONGLONG llTime;
TIME_ZONE_INFORMATION tzinfo;
if (lpTimeZoneInformation != NULL)
......@@ -397,19 +419,12 @@ BOOL WINAPI SystemTimeToTzSpecificLocalTime(
if (!SystemTimeToFileTime(lpUniversalTime, &ft))
return FALSE;
t = ft.dwHighDateTime;
t <<= 32;
t += (UINT)ft.dwLowDateTime;
if (!_GetTimezoneBias(&tzinfo, lpUniversalTime, &lBias))
FILETIME2LL( &ft, llTime)
if (!_GetTimezoneBias(&tzinfo, lpUniversalTime, FALSE, &lBias))
return FALSE;
bias = (LONGLONG)lBias * 600000000; /* 60 seconds per minute, 100000 [100-nanoseconds-ticks] per second */
t -= bias;
ft.dwLowDateTime = (UINT)t;
ft.dwHighDateTime = (UINT)(t >> 32);
/* convert minutes to 100-nanoseconds-ticks */
llTime -= (LONGLONG)lBias * 600000000;
LL2FILETIME( llTime, &ft)
return FileTimeToSystemTime(&ft, lpLocalTime);
}
......@@ -431,7 +446,7 @@ BOOL WINAPI TzSpecificLocalTimeToSystemTime(
{
FILETIME ft;
LONG lBias;
LONGLONG t, bias;
LONGLONG t;
TIME_ZONE_INFORMATION tzinfo;
if (lpTimeZoneInformation != NULL)
......@@ -446,20 +461,12 @@ BOOL WINAPI TzSpecificLocalTimeToSystemTime(
if (!SystemTimeToFileTime(lpLocalTime, &ft))
return FALSE;
t = ft.dwHighDateTime;
t <<= 32;
t += (UINT)ft.dwLowDateTime;
if (!_GetTimezoneBias(&tzinfo, lpLocalTime, &lBias))
FILETIME2LL( &ft, t)
if (!_GetTimezoneBias(&tzinfo, lpLocalTime, TRUE, &lBias))
return FALSE;
bias = (LONGLONG)lBias * 600000000; /* 60 seconds per minute, 100000 [100-nanoseconds-ticks] per second */
t += bias;
ft.dwLowDateTime = (UINT)t;
ft.dwHighDateTime = (UINT)(t >> 32);
/* convert minutes to 100-nanoseconds-ticks */
t += (LONGLONG)lBias * 600000000;
LL2FILETIME( t, &ft)
return FileTimeToSystemTime(&ft, lpUniversalTime);
}
......
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