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Use the functions from ntdll in SystemeTimeToFileTime/FileTimeToSystemTime.
svn path=/trunk/; revision=3494
This commit is contained in:
Hartmut Birr
parent
5c88f1916c
commit
0542fdd563
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@ -1,4 +1,4 @@
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/* $Id: time.c,v 1.16 2002/09/08 10:22:45 chorns Exp $
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/* $Id: time.c,v 1.17 2002/09/13 18:53:17 hbirr Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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@ -37,51 +37,6 @@ typedef struct __DOSDATE
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} DOSDATE, *PDOSDATE;
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#define TICKSPERMIN 600000000
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#define TICKSPERSEC 10000000
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#define TICKSPERMSEC 10000
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#define SECSPERDAY 86400
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#define SECSPERHOUR 3600
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#define SECSPERMIN 60
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#define MINSPERHOUR 60
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#define HOURSPERDAY 24
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#define EPOCHWEEKDAY 0
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#define DAYSPERWEEK 7
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#define EPOCHYEAR 1601
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#define DAYSPERNORMALYEAR 365
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#define DAYSPERLEAPYEAR 366
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#define MONSPERYEAR 12
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static const int YearLengths[2] = {DAYSPERNORMALYEAR, DAYSPERLEAPYEAR};
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static const int MonthLengths[2][MONSPERYEAR] =
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{
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{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
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{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
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};
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static __inline int IsLeapYear(int Year)
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{
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return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
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}
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static __inline void NormalizeTimeFields(WORD *FieldToNormalize,
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WORD *CarryField,
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int Modulus)
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{
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*FieldToNormalize = (WORD) (*FieldToNormalize - Modulus);
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*CarryField = (WORD) (*CarryField + 1);
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}
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#define LISECOND RtlEnlargedUnsignedMultiply(SECOND,NSPERSEC)
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#define LIMINUTE RtlEnlargedUnsignedMultiply(MINUTE,NSPERSEC)
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#define LIHOUR RtlEnlargedUnsignedMultiply(HOUR,NSPERSEC)
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#define LIDAY RtlEnlargedUnsignedMultiply(DAY,NSPERSEC)
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#define LIYEAR RtlEnlargedUnsignedMultiply(YEAR,NSPERSEC)
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#define LIFOURYEAR RtlEnlargedUnsignedMultiply(FOURYEAR,NSPERSEC)
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#define LICENTURY RtlEnlargedUnsignedMultiply(CENTURY,NSPERSEC)
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#define LIMILLENIUM RtlEnlargedUnsignedMultiply(CENTURY,10*NSPERSEC)
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/* FUNCTIONS ****************************************************************/
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@ -186,67 +141,24 @@ SystemTimeToFileTime(
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)
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{
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int CurYear, CurMonth, MonthLength;
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long long int rcTime;
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SYSTEMTIME SystemTime;
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TIME_FIELDS TimeFields;
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LARGE_INTEGER liTime;
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memcpy (&SystemTime, lpSystemTime, sizeof(SYSTEMTIME));
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TimeFields.Year = lpSystemTime->wYear;
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TimeFields.Month = lpSystemTime->wMonth;
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TimeFields.Day = lpSystemTime->wDay;
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TimeFields.Hour = lpSystemTime->wHour;
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TimeFields.Minute = lpSystemTime->wMinute;
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TimeFields.Second = lpSystemTime->wSecond;
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TimeFields.Milliseconds = lpSystemTime->wMilliseconds;
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rcTime = 0;
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/* FIXME: normalize the TIME_FIELDS structure here */
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while (SystemTime.wSecond >= SECSPERMIN)
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{
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NormalizeTimeFields(&SystemTime.wSecond,
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&SystemTime.wMinute,
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SECSPERMIN);
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}
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while (SystemTime.wMinute >= MINSPERHOUR)
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{
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NormalizeTimeFields(&SystemTime.wMinute,
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&SystemTime.wHour,
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MINSPERHOUR);
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}
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while (SystemTime.wHour >= HOURSPERDAY)
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{
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NormalizeTimeFields(&SystemTime.wHour,
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&SystemTime.wDay,
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HOURSPERDAY);
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}
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MonthLength =
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MonthLengths[IsLeapYear(SystemTime.wYear)][SystemTime.wMonth - 1];
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while (SystemTime.wDay > MonthLength)
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{
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NormalizeTimeFields(&SystemTime.wDay,
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&SystemTime.wMonth,
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MonthLength);
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}
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while (SystemTime.wMonth > MONSPERYEAR)
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{
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NormalizeTimeFields(&SystemTime.wMonth,
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&SystemTime.wYear,
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MONSPERYEAR);
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}
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/* FIXME: handle calendar corrections here */
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for (CurYear = EPOCHYEAR; CurYear < SystemTime.wYear; CurYear++)
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{
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rcTime += YearLengths[IsLeapYear(CurYear)];
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}
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for (CurMonth = 1; CurMonth < SystemTime.wMonth; CurMonth++)
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{
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rcTime += MonthLengths[IsLeapYear(CurYear)][CurMonth - 1];
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}
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rcTime += SystemTime.wDay - 1;
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rcTime *= SECSPERDAY;
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rcTime += SystemTime.wHour * SECSPERHOUR +
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SystemTime.wMinute * SECSPERMIN + SystemTime.wSecond;
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rcTime *= TICKSPERSEC;
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rcTime += SystemTime.wMilliseconds * TICKSPERMSEC;
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*lpFileTime = *(FILETIME *)&rcTime;
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return TRUE;
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if (RtlTimeFieldsToTime (&TimeFields, &liTime))
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{
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lpFileTime->dwLowDateTime = liTime.u.LowPart;
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lpFileTime->dwHighDateTime = liTime.u.LowPart;
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return TRUE;
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}
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return FALSE;
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}
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// dwDayOfWeek = RtlLargeIntegerDivide(FileTime,LIDAY,&dwRemDay);
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@ -261,68 +173,27 @@ FileTimeToSystemTime(
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LPSYSTEMTIME lpSystemTime
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)
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{
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const int *Months;
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int LeapSecondCorrections, SecondsInDay, CurYear;
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int LeapYear, CurMonth;
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long int Days;
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long long int Time = *((long long int*)lpFileTime);
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TIME_FIELDS TimeFields;
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LARGE_INTEGER liTime;
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/* Extract millisecond from time and convert time into seconds */
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lpSystemTime->wMilliseconds = (WORD)((Time % TICKSPERSEC) / TICKSPERMSEC);
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Time = Time / TICKSPERSEC;
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liTime.u.LowPart = lpFileTime->dwLowDateTime;
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liTime.u.HighPart = lpFileTime->dwHighDateTime;
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/* FIXME: Compute the number of leap second corrections here */
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LeapSecondCorrections = 0;
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if (liTime.u.HighPart >= 0x80000000)
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{
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return FALSE;
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}
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/* Split the time into days and seconds within the day */
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Days = Time / SECSPERDAY;
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SecondsInDay = Time % SECSPERDAY;
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RtlTimeToTimeFields(&liTime, &TimeFields);
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/* Adjust the values for GMT and leap seconds */
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SecondsInDay += LeapSecondCorrections;
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while (SecondsInDay < 0)
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{
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SecondsInDay += SECSPERDAY;
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Days--;
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}
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while (SecondsInDay >= SECSPERDAY)
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{
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SecondsInDay -= SECSPERDAY;
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Days++;
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}
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/* compute time of day */
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lpSystemTime->wHour = (WORD) (SecondsInDay / SECSPERHOUR);
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SecondsInDay = SecondsInDay % SECSPERHOUR;
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lpSystemTime->wMinute = (WORD) (SecondsInDay / SECSPERMIN);
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lpSystemTime->wSecond = (WORD) (SecondsInDay % SECSPERMIN);
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/* FIXME: handle the possibility that we are on a leap second (i.e. Second = 60) */
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/* compute day of week */
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lpSystemTime->wDayOfWeek = (WORD) ((EPOCHWEEKDAY + Days) % DAYSPERWEEK);
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/* compute year */
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CurYear = EPOCHYEAR;
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/* FIXME: handle calendar modifications */
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while (1)
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{
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LeapYear = IsLeapYear(CurYear);
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if (Days < (long) YearLengths[LeapYear])
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{
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break;
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}
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CurYear++;
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Days = Days - (long) YearLengths[LeapYear];
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}
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lpSystemTime->wYear = (WORD) CurYear;
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/* Compute month of year */
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Months = MonthLengths[LeapYear];
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for (CurMonth = 0; Days >= (long) Months[CurMonth]; CurMonth++)
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Days = Days - (long) Months[CurMonth];
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lpSystemTime->wMonth = (WORD) (CurMonth + 1);
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lpSystemTime->wDay = (WORD) (Days + 1);
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lpSystemTime->wYear = TimeFields.Year;
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lpSystemTime->wMonth = TimeFields.Month;
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lpSystemTime->wDay = TimeFields.Day;
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lpSystemTime->wHour = TimeFields.Hour;
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lpSystemTime->wMinute = TimeFields.Minute;
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lpSystemTime->wSecond = TimeFields.Second;
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lpSystemTime->wMilliseconds = TimeFields.Milliseconds;
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lpSystemTime->wDayOfWeek = TimeFields.Weekday;
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return TRUE;
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}
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