274 lines
8.6 KiB
C
274 lines
8.6 KiB
C
/*
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* Conversion between Time and TimeFields
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*
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* RtlTimeToTimeFields, RtlTimeFieldsToTime and defines are taken from ReactOS and
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* adapted to wine with special permissions of the author
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* Rex Jolliff (rex@lvcablemodem.com)
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*
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* Copyright 1999 Juergen Schmied
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h>
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#include <time.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "ntddk.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
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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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/* 1601 to 1970 is 369 years plus 89 leap days */
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#define SECS_1601_TO_1970 ((369 * 365 + 89) * 86400ULL)
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/* 1601 to 1980 is 379 years plus 91 leap days */
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#define SECS_1601_to_1980 ((379 * 365 + 91) * 86400ULL)
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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(CSHORT *FieldToNormalize, CSHORT *CarryField,int Modulus)
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{
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*FieldToNormalize = (CSHORT) (*FieldToNormalize - Modulus);
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*CarryField = (CSHORT) (*CarryField + 1);
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}
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/******************************************************************************
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* RtlTimeToTimeFields [NTDLL.@]
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*
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*/
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VOID WINAPI RtlTimeToTimeFields(
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PLARGE_INTEGER liTime,
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PTIME_FIELDS TimeFields)
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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, GMTOffset;
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long int Days;
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long long int Time = *(long long int *)&liTime;
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/* Extract millisecond from time and convert time into seconds */
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TimeFields->Milliseconds = (CSHORT) ((Time % TICKSPERSEC) / TICKSPERMSEC);
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Time = Time / TICKSPERSEC;
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/* FIXME: Compute the number of leap second corrections here */
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LeapSecondCorrections = 0;
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/* FIXME: get the GMT offset here */
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GMTOffset = 0;
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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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/* Adjust the values for GMT and leap seconds */
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SecondsInDay += (GMTOffset - LeapSecondCorrections);
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while (SecondsInDay < 0)
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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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{ SecondsInDay -= SECSPERDAY;
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Days++;
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}
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/* compute time of day */
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TimeFields->Hour = (CSHORT) (SecondsInDay / SECSPERHOUR);
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SecondsInDay = SecondsInDay % SECSPERHOUR;
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TimeFields->Minute = (CSHORT) (SecondsInDay / SECSPERMIN);
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TimeFields->Second = (CSHORT) (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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TimeFields->Weekday = (CSHORT) ((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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{ LeapYear = IsLeapYear(CurYear);
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if (Days < (long) YearLengths[LeapYear])
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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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TimeFields->Year = (CSHORT) 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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TimeFields->Month = (CSHORT) (CurMonth + 1);
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TimeFields->Day = (CSHORT) (Days + 1);
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}
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/******************************************************************************
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* RtlTimeFieldsToTime [NTDLL.@]
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*
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*/
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BOOLEAN WINAPI RtlTimeFieldsToTime(
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PTIME_FIELDS tfTimeFields,
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PLARGE_INTEGER Time)
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{
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int CurYear, CurMonth;
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long long int rcTime;
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TIME_FIELDS TimeFields = *tfTimeFields;
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rcTime = 0;
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/* FIXME: normalize the TIME_FIELDS structure here */
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while (TimeFields.Second >= SECSPERMIN)
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{ NormalizeTimeFields(&TimeFields.Second, &TimeFields.Minute, SECSPERMIN);
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}
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while (TimeFields.Minute >= MINSPERHOUR)
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{ NormalizeTimeFields(&TimeFields.Minute, &TimeFields.Hour, MINSPERHOUR);
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}
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while (TimeFields.Hour >= HOURSPERDAY)
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{ NormalizeTimeFields(&TimeFields.Hour, &TimeFields.Day, HOURSPERDAY);
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}
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while (TimeFields.Day > MonthLengths[IsLeapYear(TimeFields.Year)][TimeFields.Month - 1])
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{ NormalizeTimeFields(&TimeFields.Day, &TimeFields.Month, SECSPERMIN);
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}
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while (TimeFields.Month > MONSPERYEAR)
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{ NormalizeTimeFields(&TimeFields.Month, &TimeFields.Year, MONSPERYEAR);
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}
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/* FIXME: handle calendar corrections here */
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for (CurYear = EPOCHYEAR; CurYear < TimeFields.Year; CurYear++)
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{ rcTime += YearLengths[IsLeapYear(CurYear)];
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}
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for (CurMonth = 1; CurMonth < TimeFields.Month; CurMonth++)
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{ rcTime += MonthLengths[IsLeapYear(CurYear)][CurMonth - 1];
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}
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rcTime += TimeFields.Day - 1;
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rcTime *= SECSPERDAY;
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rcTime += TimeFields.Hour * SECSPERHOUR + TimeFields.Minute * SECSPERMIN + TimeFields.Second;
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rcTime *= TICKSPERSEC;
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rcTime += TimeFields.Milliseconds * TICKSPERMSEC;
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*Time = *(LARGE_INTEGER *)&rcTime;
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return TRUE;
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}
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/************* end of code by Rex Jolliff (rex@lvcablemodem.com) *******************/
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/******************************************************************************
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* RtlSystemTimeToLocalTime [NTDLL.@]
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*/
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VOID WINAPI RtlSystemTimeToLocalTime(
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IN PLARGE_INTEGER SystemTime,
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OUT PLARGE_INTEGER LocalTime)
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{
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FIXME("(%p, %p),stub!\n",SystemTime,LocalTime);
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memcpy (LocalTime, SystemTime, sizeof (PLARGE_INTEGER));
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}
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/******************************************************************************
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* RtlTimeToSecondsSince1970 [NTDLL.@]
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*/
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BOOLEAN WINAPI RtlTimeToSecondsSince1970( const FILETIME *time, LPDWORD res )
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{
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ULONGLONG tmp = ((ULONGLONG)time->dwHighDateTime << 32) | time->dwLowDateTime;
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tmp = RtlLargeIntegerDivide( tmp, 10000000LL, NULL );
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tmp -= SECS_1601_TO_1970;
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if (tmp > 0xffffffff) return FALSE;
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*res = (DWORD)tmp;
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return TRUE;
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}
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/******************************************************************************
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* RtlTimeToSecondsSince1980 [NTDLL.@]
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*/
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BOOLEAN WINAPI RtlTimeToSecondsSince1980( const FILETIME *time, LPDWORD res )
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{
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ULONGLONG tmp = ((ULONGLONG)time->dwHighDateTime << 32) | time->dwLowDateTime;
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tmp = RtlLargeIntegerDivide( tmp, 10000000LL, NULL );
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tmp -= SECS_1601_to_1980;
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if (tmp > 0xffffffff) return FALSE;
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*res = (DWORD)tmp;
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return TRUE;
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}
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/******************************************************************************
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* RtlSecondsSince1970ToTime [NTDLL.@]
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*/
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void WINAPI RtlSecondsSince1970ToTime( DWORD time, FILETIME *res )
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{
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ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_TO_1970, 10000000 );
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res->dwLowDateTime = (DWORD)secs;
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res->dwHighDateTime = (DWORD)(secs >> 32);
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}
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/******************************************************************************
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* RtlSecondsSince1980ToTime [NTDLL.@]
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*/
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void WINAPI RtlSecondsSince1980ToTime( DWORD time, FILETIME *res )
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{
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ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_to_1980, 10000000 );
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res->dwLowDateTime = (DWORD)secs;
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res->dwHighDateTime = (DWORD)(secs >> 32);
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}
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/******************************************************************************
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* RtlTimeToElapsedTimeFields [NTDLL.@]
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* FIXME: prototype guessed
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*/
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VOID WINAPI RtlTimeToElapsedTimeFields(
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PLARGE_INTEGER liTime,
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PTIME_FIELDS TimeFields)
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{
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FIXME("(%p,%p): stub\n",liTime,TimeFields);
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}
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/***********************************************************************
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* NtQuerySystemTime (NTDLL.@)
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* ZwQuerySystemTime (NTDLL.@)
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*/
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void WINAPI NtQuerySystemTime( LARGE_INTEGER *time )
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{
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LONGLONG secs;
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struct timeval now;
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gettimeofday( &now, 0 );
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secs = now.tv_sec + SECS_1601_TO_1970;
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time->QuadPart = RtlExtendedIntegerMultiply( secs, 10000000 ) + now.tv_usec * 10;
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}
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