/* * Nt time functions. * * RtlTimeToTimeFields, RtlTimeFieldsToTime and defines are taken from ReactOS and * adapted to wine with special permissions of the author * Rex Jolliff (rex@lvcablemodem.com) * * Copyright 1999 Juergen Schmied * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #define WINE_LARGE_INTEGER 1 #define WINE_LONGLONG 1 #include "config.h" #include "wine/port.h" #include #include #include #include #include #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "winternl.h" #include "wine/unicode.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(ntdll); #define SETTIME_MAX_ADJUST 120 /* This structure is used to store strings that represent all of the time zones * in the world. (This is used to help GetTimeZoneInformation) */ struct tagTZ_INFO { const char *psTZFromUnix; WCHAR psTZWindows[32]; int bias; int dst; }; static const struct tagTZ_INFO TZ_INFO[] = { {"MHT", {'D','a','t','e','l','i','n','e',' ','S','t','a','n','d','a','r','d',' ', 'T','i','m','e','\0'}, -720, 0}, {"SST", {'S','a','m','o','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, 660, 0}, {"HST", {'H','a','w','a','i','i','a','n',' ','S','t','a','n','d','a','r','d',' ', 'T','i','m','e','\0'}, 600, 0}, {"AKDT", {'A','l','a','s','k','a','n',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, 480, 1}, {"PDT", {'P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, 420, 1}, {"MST", {'U','S',' ','M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a', 'r','d',' ','T','i','m','e','\0'}, 420, 0}, {"MDT", {'M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a','r','d',' ', 'T','i','m','e','\0'}, 360, 1}, {"CST", {'C','e','n','t','r','a','l',' ','A','m','e','r','i','c','a',' ','S','t', 'a','n','d','a','r','d',' ','T','i','m','e','\0'}, 360, 0}, {"CDT", {'C','e','n','t','r','a','l',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, 300, 1}, {"COT", {'S','A',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 300, 0}, {"EDT", {'E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, 240, 1}, {"EST", {'U','S',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 300, 0}, {"ADT", {'A','t','l','a','n','t','i','c',' ','S','t','a','n','d','a','r','d',' ', 'T','i','m','e','\0'}, 180, 1}, {"VET", {'S','A',' ','W','e','s','t','e','r','n',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 240, 0}, {"CLT", {'P','a','c','i','f','i','c',' ','S','A',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 240, 0}, {"NDT", {'N','e','w','f','o','u','n','d','l','a','n','d',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, 150, 1}, {"BRT", {'E','.',' ','S','o','u','t','h',' ','A','m','e','r','i','c','a',' ','S', 't','a','n','d','a','r','d',' ','T','i','m','e','\0'}, 180, 0}, {"ART", {'S','A',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 180, 0}, {"WGST", {'G','r','e','e','n','l','a','n','d',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, 120, 1}, {"GST", {'M','i','d','-','A','t','l','a','n','t','i','c',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, 120, 0}, {"AZOST", {'A','z','o','r','e','s',' ','S','t','a','n','d','a','r','d',' ','T','i', 'm','e','\0'}, 0, 1}, {"CVT", {'C','a','p','e',' ','V','e','r','d','e',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, 60, 0}, {"WET", {'G','r','e','e','n','w','i','c','h',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, 0, 0}, {"BST", {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 1}, {"GMT", {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'}, 0, 0}, {"CEST", {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','S','t','a', 'n','d','a','r','d',' ','T','i','m','e','\0'}, -120, 1}, {"WAT", {'W','.',' ','C','e','n','t','r','a','l',' ','A','f','r','i','c','a',' ', 'S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 0}, {"EEST", {'E','.',' ','E','u','r','o','p','e',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, -180, 1}, {"EET", {'E','g','y','p','t',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -120, 0}, {"CAT", {'S','o','u','t','h',' ','A','f','r','i','c','a',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -120, 0}, {"IST", {'I','s','r','a','e','l',' ','S','t','a','n','d','a','r','d',' ','T','i', 'm','e','\0'}, -120, 0}, {"ADT", {'A','r','a','b','i','c',' ','S','t','a','n','d','a','r','d',' ','T','i', 'm','e','\0'}, -240, 1}, {"AST", {'A','r','a','b',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e', '\0'}, -180, 0}, {"MSD", {'R','u','s','s','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, -240, 1}, {"EAT", {'E','.',' ','A','f','r','i','c','a',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, -180, 0}, {"IRST", {'I','r','a','n',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e', '\0'}, -270, 1}, {"GST", {'A','r','a','b','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, -240, 0}, {"AZST", {'C','a','u','c','a','s','u','s',' ','S','t','a','n','d','a','r','d',' ', 'T','i','m','e','\0'}, -300, 1}, {"AFT", {'A','f','g','h','a','n','i','s','t','a','n',' ','S','t','a','n','d','a', 'r','d',' ','T','i','m','e','\0'}, -270, 0}, {"YEKST", {'E','k','a','t','e','r','i','n','b','u','r','g',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -360, 1}, {"PKT", {'W','e','s','t',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, -300, 0}, {"IST", {'I','n','d','i','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -330, 0}, {"NPT", {'N','e','p','a','l',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -345, 0}, {"ALMST", {'N','.',' ','C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t', 'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -420, 1}, {"BDT", {'C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -360, 0}, {"LKT", {'S','r','i',' ','L','a','n','k','a',' ','S','t','a','n','d','a','r','d', ' ','T','i','m','e','\0'}, -360, 0}, {"MMT", {'M','y','a','n','m','a','r',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, -390, 0}, {"ICT", {'S','E',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, -420, 0}, {"KRAST", {'N','o','r','t','h',' ','A','s','i','a',' ','S','t','a','n','d','a','r', 'd',' ','T','i','m','e','\0'}, -480, 1}, {"CST", {'C','h','i','n','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -480, 0}, {"IRKST", {'N','o','r','t','h',' ','A','s','i','a',' ','E','a','s','t',' ','S','t', 'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -540, 1}, {"SGT", {'M','a','l','a','y',' ','P','e','n','i','n','s','u','l','a',' ','S','t', 'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -480, 0}, {"WST", {'W','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -480, 0}, {"JST", {'T','o','k','y','o',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -540, 0}, {"KST", {'K','o','r','e','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -540, 0}, {"YAKST", {'Y','a','k','u','t','s','k',' ','S','t','a','n','d','a','r','d',' ','T', 'i','m','e','\0'}, -600, 1}, {"CST", {'C','e','n','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a', 'n','d','a','r','d',' ','T','i','m','e','\0'}, -570, 0}, {"EST", {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -600, 0}, {"GST", {'W','e','s','t',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d', 'a','r','d',' ','T','i','m','e','\0'}, -600, 0}, {"VLAST", {'V','l','a','d','i','v','o','s','t','o','k',' ','S','t','a','n','d','a', 'r','d',' ','T','i','m','e','\0'}, -660, 1}, {"MAGST", {'C','e','n','t','r','a','l',' ','P','a','c','i','f','i','c',' ','S','t', 'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -720, 1}, {"NZST", {'N','e','w',' ','Z','e','a','l','a','n','d',' ','S','t','a','n','d','a', 'r','d',' ','T','i','m','e','\0'}, -720, 0}, {"FJT", {'F','i','j','i',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e', '\0'}, -720, 0}, {"TOT", {'T','o','n','g','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m', 'e','\0'}, -780, 0} }; /*********** start of code by Rex Jolliff (rex@lvcablemodem.com) **************/ #define TICKSPERSEC 10000000 #define TICKSPERMSEC 10000 #define SECSPERDAY 86400 #define SECSPERHOUR 3600 #define SECSPERMIN 60 #define MINSPERHOUR 60 #define HOURSPERDAY 24 #define EPOCHWEEKDAY 1 /* Jan 1, 1601 was Monday */ #define DAYSPERWEEK 7 #define EPOCHYEAR 1601 #define DAYSPERNORMALYEAR 365 #define DAYSPERLEAPYEAR 366 #define MONSPERYEAR 12 /* 1601 to 1970 is 369 years plus 89 leap days */ #define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)86400) /* 1601 to 1980 is 379 years plus 91 leap days */ #define SECS_1601_to_1980 ((379 * 365 + 91) * (ULONGLONG)86400) static const int YearLengths[2] = {DAYSPERNORMALYEAR, DAYSPERLEAPYEAR}; static const int MonthLengths[2][MONSPERYEAR] = { { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } }; static inline int IsLeapYear(int Year) { return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0; } static inline void NormalizeTimeFields(CSHORT *FieldToNormalize, CSHORT *CarryField,int Modulus) { *FieldToNormalize = (CSHORT) (*FieldToNormalize - Modulus); *CarryField = (CSHORT) (*CarryField + 1); } /****************************************************************************** * RtlTimeToTimeFields [NTDLL.@] * * Parses Time into a TimeFields structure. * * PARAMS: * liTime [I]: Time to convert to timefields. * TimeFields [O]: Pointer to TIME_FIELDS structure to hold parsed info. * * RETURNS: * Nothing. */ VOID WINAPI RtlTimeToTimeFields( const LARGE_INTEGER *liTime, PTIME_FIELDS TimeFields) { const int *Months; int SecondsInDay, CurYear; int LeapYear, CurMonth; long int Days; LONGLONG Time = liTime->QuadPart; /* Extract millisecond from time and convert time into seconds */ TimeFields->Milliseconds = (CSHORT) ((Time % TICKSPERSEC) / TICKSPERMSEC); Time = Time / TICKSPERSEC; /* The native version of RtlTimeToTimeFields does not take leap seconds * into account */ /* Split the time into days and seconds within the day */ Days = Time / SECSPERDAY; SecondsInDay = Time % SECSPERDAY; /* compute time of day */ TimeFields->Hour = (CSHORT) (SecondsInDay / SECSPERHOUR); SecondsInDay = SecondsInDay % SECSPERHOUR; TimeFields->Minute = (CSHORT) (SecondsInDay / SECSPERMIN); TimeFields->Second = (CSHORT) (SecondsInDay % SECSPERMIN); /* compute day of week */ TimeFields->Weekday = (CSHORT) ((EPOCHWEEKDAY + Days) % DAYSPERWEEK); /* compute year */ CurYear = EPOCHYEAR; /* FIXME: handle calendar modifications */ while (1) { LeapYear = IsLeapYear(CurYear); if (Days < (long) YearLengths[LeapYear]) { break; } CurYear++; Days = Days - (long) YearLengths[LeapYear]; } TimeFields->Year = (CSHORT) CurYear; /* Compute month of year */ Months = MonthLengths[LeapYear]; for (CurMonth = 0; Days >= (long) Months[CurMonth]; CurMonth++) Days = Days - (long) Months[CurMonth]; TimeFields->Month = (CSHORT) (CurMonth + 1); TimeFields->Day = (CSHORT) (Days + 1); } /****************************************************************************** * RtlTimeFieldsToTime [NTDLL.@] * * Converts a TIME_FIELDS structure to time. * * PARAMS: * ftTimeFields [I]: Time fields structure to convert. * Time [O]: Converted time. * * RETURNS: * TRUE: Successfull * FALSE: Failure. */ BOOLEAN WINAPI RtlTimeFieldsToTime( PTIME_FIELDS tfTimeFields, PLARGE_INTEGER Time) { int CurYear, CurMonth; LONGLONG rcTime; TIME_FIELDS TimeFields = *tfTimeFields; rcTime = 0; /* FIXME: normalize the TIME_FIELDS structure here */ while (TimeFields.Second >= SECSPERMIN) { NormalizeTimeFields(&TimeFields.Second, &TimeFields.Minute, SECSPERMIN); } while (TimeFields.Minute >= MINSPERHOUR) { NormalizeTimeFields(&TimeFields.Minute, &TimeFields.Hour, MINSPERHOUR); } while (TimeFields.Hour >= HOURSPERDAY) { NormalizeTimeFields(&TimeFields.Hour, &TimeFields.Day, HOURSPERDAY); } while (TimeFields.Day > MonthLengths[IsLeapYear(TimeFields.Year)][TimeFields.Month - 1]) { NormalizeTimeFields(&TimeFields.Day, &TimeFields.Month, SECSPERMIN); } while (TimeFields.Month > MONSPERYEAR) { NormalizeTimeFields(&TimeFields.Month, &TimeFields.Year, MONSPERYEAR); } /* FIXME: handle calendar corrections here */ for (CurYear = EPOCHYEAR; CurYear < TimeFields.Year; CurYear++) { rcTime += YearLengths[IsLeapYear(CurYear)]; } for (CurMonth = 1; CurMonth < TimeFields.Month; CurMonth++) { rcTime += MonthLengths[IsLeapYear(CurYear)][CurMonth - 1]; } rcTime += TimeFields.Day - 1; rcTime *= SECSPERDAY; rcTime += TimeFields.Hour * SECSPERHOUR + TimeFields.Minute * SECSPERMIN + TimeFields.Second; rcTime *= TICKSPERSEC; rcTime += TimeFields.Milliseconds * TICKSPERMSEC; Time->QuadPart = rcTime; return TRUE; } /************ end of code by Rex Jolliff (rex@lvcablemodem.com) ***************/ /****************************************************************************** * RtlLocalTimeToSystemTime [NTDLL.@] * * Converts local time to system time. * * PARAMS: * LocalTime [I]: Localtime to convert. * SystemTime [O]: SystemTime of the supplied localtime. * * RETURNS: * Status. */ NTSTATUS WINAPI RtlLocalTimeToSystemTime( const LARGE_INTEGER *LocalTime, PLARGE_INTEGER SystemTime) { TIME_ZONE_INFORMATION tzinfo; TRACE("(%p, %p)\n", LocalTime, SystemTime); RtlQueryTimeZoneInformation(&tzinfo); SystemTime->QuadPart = LocalTime->QuadPart + tzinfo.Bias * 60 * (LONGLONG)10000000; return STATUS_SUCCESS; } /****************************************************************************** * RtlSystemTimeToLocalTime [NTDLL.@] * * Converts system Time to local time. * * PARAMS: * SystemTime [I]: System time to convert. * LocalTime [O]: Local time of the supplied system time. * * RETURNS: * Nothing. */ void WINAPI RtlSystemTimeToLocalTime( PLARGE_INTEGER SystemTime, PLARGE_INTEGER LocalTime ) { TIME_ZONE_INFORMATION tzinfo; TRACE("(%p, %p)\n", SystemTime, LocalTime); RtlQueryTimeZoneInformation(&tzinfo); LocalTime->QuadPart = SystemTime->QuadPart - tzinfo.Bias * 60 * (LONGLONG)10000000; return; } /****************************************************************************** * RtlTimeToSecondsSince1970 [NTDLL.@] * * Converts Time to seconds since 1970. * * PARAMS: * time [I]: Time to convert. * res [O]: Pointer to a LONG to recieve the seconds since 1970. * * RETURNS: * TRUE: Successfull. * FALSE: Failure. */ BOOLEAN WINAPI RtlTimeToSecondsSince1970( const LARGE_INTEGER *time, PULONG res ) { ULONGLONG tmp = ((ULONGLONG)time->s.HighPart << 32) | time->s.LowPart; tmp = RtlLargeIntegerDivide( tmp, 10000000, NULL ); tmp -= SECS_1601_TO_1970; if (tmp > 0xffffffff) return FALSE; *res = (DWORD)tmp; return TRUE; } /****************************************************************************** * RtlTimeToSecondsSince1980 [NTDLL.@] * * Converts Time to seconds since 1980. * * PARAMS: * time [I]: Time to convert. * res [O]: Pointer to a integer to recieve the time since 1980. * * RETURNS: * TRUE: Successfull * FALSE: Failure. */ BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *time, LPDWORD res ) { ULONGLONG tmp = ((ULONGLONG)time->s.HighPart << 32) | time->s.LowPart; tmp = RtlLargeIntegerDivide( tmp, 10000000, NULL ); tmp -= SECS_1601_to_1980; if (tmp > 0xffffffff) return FALSE; *res = (DWORD)tmp; return TRUE; } /****************************************************************************** * RtlSecondsSince1970ToTime [NTDLL.@] * * Converts seconds since 1970 to time. * * PARAMS: * time [I]: Seconds since 1970 to convert. * res [O]: Seconds since 1970 in Time. * * RETURNS: * Nothing. */ void WINAPI RtlSecondsSince1970ToTime( DWORD time, LARGE_INTEGER *res ) { ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_TO_1970, 10000000 ); res->s.LowPart = (DWORD)secs; res->s.HighPart = (DWORD)(secs >> 32); } /****************************************************************************** * RtlSecondsSince1980ToTime [NTDLL.@] * * Converts seconds since 1980 to time. * * PARAMS: * time [I]: Seconds since 1980 to convert. * res [O]: Seconds since 1980 in Time. * * RETURNS: * Nothing. */ void WINAPI RtlSecondsSince1980ToTime( DWORD time, LARGE_INTEGER *res ) { ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_to_1980, 10000000 ); res->s.LowPart = (DWORD)secs; res->s.HighPart = (DWORD)(secs >> 32); } /****************************************************************************** * RtlTimeToElapsedTimeFields [NTDLL.@] * * RETURNS: * Nothing. */ void WINAPI RtlTimeToElapsedTimeFields( LARGE_INTEGER *Time, PTIME_FIELDS TimeFields ) { LONGLONG time; UINT rem; time = RtlExtendedLargeIntegerDivide( Time->QuadPart, TICKSPERSEC, &rem ); TimeFields->Milliseconds = rem / TICKSPERMSEC; /* time is now in seconds */ TimeFields->Year = 0; TimeFields->Month = 0; TimeFields->Day = RtlExtendedLargeIntegerDivide( time, SECSPERDAY, &rem ); /* rem is now the remaining seconds in the last day */ TimeFields->Second = rem % 60; rem /= 60; TimeFields->Minute = rem % 60; TimeFields->Hour = rem / 60; } /*********************************************************************** * NtQuerySystemTime [NTDLL.@] * ZwQuerySystemTime [NTDLL.@] * * Gets the current system time. * * PARAMS: * time [O]: The current system time. * * RETURNS: * Status. */ NTSTATUS WINAPI NtQuerySystemTime( LARGE_INTEGER *time ) { struct timeval now; gettimeofday( &now, 0 ); time->QuadPart = RtlExtendedIntegerMultiply( now.tv_sec+SECS_1601_TO_1970, 10000000 ) + now.tv_usec * 10; return STATUS_SUCCESS; } /*********************************************************************** * TIME_GetBias [internal] * * Helper function calculates delta local time from UTC. * * PARAMS: * utc [I]: The current utc time. * pdaylight [I]: Local daylight. * * RETURNS: * The bias for the current timezone. */ static int TIME_GetBias(time_t utc, int *pdaylight) { struct tm *ptm = localtime(&utc); *pdaylight = ptm->tm_isdst; /* daylight for local timezone */ ptm = gmtime(&utc); ptm->tm_isdst = *pdaylight; /* use local daylight, not that of Greenwich */ return (int)(utc-mktime(ptm)); } /*********************************************************************** * TIME_GetTZAsStr [internal] * * Helper function that returns the given timezone as a string. * * PARAMS: * utc [I]: The current utc time. * bias [I]: The bias of the current timezone. * dst [I]: ?? * * RETURNS: * Timezone name. * * NOTES: * This could be done with a hash table instead of merely iterating through a * table, however with the small amount of entries (60 or so) I didn't think * it was worth it. */ static const WCHAR* TIME_GetTZAsStr (time_t utc, int bias, int dst) { char psTZName[7]; struct tm *ptm = localtime(&utc); int i; if (!strftime (psTZName, 7, "%Z", ptm)) return (NULL); for (i=0; i<(sizeof(TZ_INFO) / sizeof(struct tagTZ_INFO)); i++) { if ( strcmp(TZ_INFO[i].psTZFromUnix, psTZName) == 0 && TZ_INFO[i].bias == bias && TZ_INFO[i].dst == dst ) return TZ_INFO[i].psTZWindows; } return (NULL); } /*********************************************************************** * RtlQueryTimeZoneInformation [NTDLL.@] * * Returns the timezone. * * PARAMS: * tzinfo [O]: Retrieves the timezone info. * * RETURNS: * Status. */ NTSTATUS WINAPI RtlQueryTimeZoneInformation(LPTIME_ZONE_INFORMATION tzinfo) { time_t gmt; int bias, daylight; const WCHAR *psTZ; memset(tzinfo, 0, sizeof(TIME_ZONE_INFORMATION)); gmt = time(NULL); bias = TIME_GetBias(gmt, &daylight); tzinfo->Bias = -bias / 60; tzinfo->StandardBias = 0; tzinfo->DaylightBias = -60; psTZ = TIME_GetTZAsStr (gmt, (-bias/60), daylight); if (psTZ) strcpyW( tzinfo->StandardName, psTZ ); return STATUS_SUCCESS; } /*********************************************************************** * RtlSetTimeZoneInformation [NTDLL.@] * * Sets the current time zone. * * PARAMS: * tzinfo [I]: Timezone information used to set timezone. * * RETURNS: * Status. * * BUGS: * Uses the obsolete unix timezone structure and tz_dsttime member. */ NTSTATUS WINAPI RtlSetTimeZoneInformation( const TIME_ZONE_INFORMATION *tzinfo ) { struct timezone tz; tz.tz_minuteswest = tzinfo->Bias; #ifdef DST_NONE tz.tz_dsttime = DST_NONE; #else tz.tz_dsttime = 0; #endif #if 0 if(!settimeofday(NULL, &tz)) return STATUS_SUCCESS; #endif return STATUS_PRIVILEGE_NOT_HELD; } /*********************************************************************** * NtSetSystemTime [NTDLL.@] * ZwSetSystemTime [NTDLL.@] * * Sets the system time. * * PARAM: * NewTime [I]: The time to set the system time to. * OldTime [O]: Optional (ie. can be NULL). Old Time. * * RETURNS: * Status. */ NTSTATUS WINAPI NtSetSystemTime(const LARGE_INTEGER *NewTime, LARGE_INTEGER *OldTime) { TIME_FIELDS tf; struct timeval tv; struct timezone tz; struct tm t; time_t sec, oldsec; int dst, bias; int err; /* Return the old time if necessary */ if(OldTime) NtQuerySystemTime(OldTime); RtlTimeToTimeFields(NewTime, &tf); /* call gettimeofday to get the current timezone */ gettimeofday(&tv, &tz); oldsec = tv.tv_sec; /* get delta local time from utc */ bias = TIME_GetBias(oldsec, &dst); /* get the number of seconds */ t.tm_sec = tf.Second; t.tm_min = tf.Minute; t.tm_hour = tf.Hour; t.tm_mday = tf.Day; t.tm_mon = tf.Month - 1; t.tm_year = tf.Year - 1900; t.tm_isdst = dst; sec = mktime (&t); /* correct for timezone and daylight */ sec += bias; /* set the new time */ tv.tv_sec = sec; tv.tv_usec = tf.Milliseconds * 1000; /* error and sanity check*/ if(sec == (time_t)-1 || abs((int)(sec-oldsec)) > SETTIME_MAX_ADJUST) { err = 2; } else { #ifdef HAVE_SETTIMEOFDAY err = settimeofday(&tv, NULL); /* 0 is OK, -1 is error */ if(err == 0) return STATUS_SUCCESS; #else err = 1; #endif } ERR("Cannot set time to %d/%d/%d %d:%d:%d Time adjustment %ld %s\n", tf.Year, tf.Month, tf.Day, tf.Hour, tf.Minute, tf.Second, sec-oldsec, err == -1 ? "No Permission" : sec == (time_t)-1 ? "" : "is too large." ); if(err == 2) return STATUS_INVALID_PARAMETER; else if(err == -1) return STATUS_PRIVILEGE_NOT_HELD; else return STATUS_NOT_IMPLEMENTED; }