/* * Nt time functions. * * RtlTimeToTimeFields, RtlTimeFieldsToTime and defines are taken from ReactOS and * adapted to wine with special permissions of the author. This code is * Copyright 2002 Rex Jolliff (rex@lvcablemodem.com) * * Copyright 1999 Juergen Schmied * Copyright 2007 Dmitry Timoshkov * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include "wine/port.h" #include #include #include #include #include #include #ifdef HAVE_SYS_TIME_H # include #endif #ifdef HAVE_UNISTD_H # include #endif #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winternl.h" #include "wine/unicode.h" #include "wine/debug.h" #include "ntdll_misc.h" WINE_DEFAULT_DEBUG_CHANNEL(ntdll); static int init_tz_info(RTL_TIME_ZONE_INFORMATION *tzi); static RTL_CRITICAL_SECTION TIME_tz_section; static RTL_CRITICAL_SECTION_DEBUG critsect_debug = { 0, 0, &TIME_tz_section, { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList }, 0, 0, { (DWORD_PTR)(__FILE__ ": TIME_tz_section") } }; static RTL_CRITICAL_SECTION TIME_tz_section = { &critsect_debug, -1, 0, 0, 0, 0 }; #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 #define DAYSPERQUADRICENTENNIUM (365 * 400 + 97) #define DAYSPERNORMALCENTURY (365 * 100 + 24) #define DAYSPERNORMALQUADRENNIUM (365 * 4 + 1) /* 1601 to 1970 is 369 years plus 89 leap days */ #define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY) #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC) /* 1601 to 1980 is 379 years plus 91 leap days */ #define SECS_1601_TO_1980 ((379 * 365 + 91) * (ULONGLONG)SECSPERDAY) #define TICKS_1601_TO_1980 (SECS_1601_TO_1980 * TICKSPERSEC) /* max ticks that can be represented as Unix time */ #define TICKS_1601_TO_UNIX_MAX ((SECS_1601_TO_1970 + INT_MAX) * TICKSPERSEC) 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; } /****************************************************************************** * RtlTimeToTimeFields [NTDLL.@] * * Convert a time into a TIME_FIELDS structure. * * PARAMS * liTime [I] Time to convert. * TimeFields [O] Destination for the converted time. * * RETURNS * Nothing. */ VOID WINAPI RtlTimeToTimeFields( const LARGE_INTEGER *liTime, PTIME_FIELDS TimeFields) { int SecondsInDay; long int cleaps, years, yearday, months; long int Days; LONGLONG Time; /* Extract millisecond from time and convert time into seconds */ TimeFields->Milliseconds = (CSHORT) (( liTime->QuadPart % TICKSPERSEC) / TICKSPERMSEC); Time = liTime->QuadPart / 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, month and day of month. */ cleaps=( 3 * ((4 * Days + 1227) / DAYSPERQUADRICENTENNIUM) + 3 ) / 4; Days += 28188 + cleaps; years = (20 * Days - 2442) / (5 * DAYSPERNORMALQUADRENNIUM); yearday = Days - (years * DAYSPERNORMALQUADRENNIUM)/4; months = (64 * yearday) / 1959; /* the result is based on a year starting on March. * To convert take 12 from Januari and Februari and * increase the year by one. */ if( months < 14 ) { TimeFields->Month = months - 1; TimeFields->Year = years + 1524; } else { TimeFields->Month = months - 13; TimeFields->Year = years + 1525; } /* calculation of day of month is based on the wonderful * sequence of INT( n * 30.6): it reproduces the * 31-30-31-30-31-31 month lengths exactly for small n's */ TimeFields->Day = yearday - (1959 * months) / 64 ; return; } /****************************************************************************** * RtlTimeFieldsToTime [NTDLL.@] * * Convert a TIME_FIELDS structure into a time. * * PARAMS * ftTimeFields [I] TIME_FIELDS structure to convert. * Time [O] Destination for the converted time. * * RETURNS * Success: TRUE. * Failure: FALSE. */ BOOLEAN WINAPI RtlTimeFieldsToTime( PTIME_FIELDS tfTimeFields, PLARGE_INTEGER Time) { int month, year, cleaps, day; /* FIXME: normalize the TIME_FIELDS structure here */ /* No, native just returns 0 (error) if the fields are not */ if( tfTimeFields->Milliseconds< 0 || tfTimeFields->Milliseconds > 999 || tfTimeFields->Second < 0 || tfTimeFields->Second > 59 || tfTimeFields->Minute < 0 || tfTimeFields->Minute > 59 || tfTimeFields->Hour < 0 || tfTimeFields->Hour > 23 || tfTimeFields->Month < 1 || tfTimeFields->Month > 12 || tfTimeFields->Day < 1 || tfTimeFields->Day > MonthLengths [ tfTimeFields->Month ==2 || IsLeapYear(tfTimeFields->Year)] [ tfTimeFields->Month - 1] || tfTimeFields->Year < 1601 ) return FALSE; /* now calculate a day count from the date * First start counting years from March. This way the leap days * are added at the end of the year, not somewhere in the middle. * Formula's become so much less complicate that way. * To convert: add 12 to the month numbers of Jan and Feb, and * take 1 from the year */ if(tfTimeFields->Month < 3) { month = tfTimeFields->Month + 13; year = tfTimeFields->Year - 1; } else { month = tfTimeFields->Month + 1; year = tfTimeFields->Year; } cleaps = (3 * (year / 100) + 3) / 4; /* nr of "century leap years"*/ day = (36525 * year) / 100 - cleaps + /* year * dayperyr, corrected */ (1959 * month) / 64 + /* months * daypermonth */ tfTimeFields->Day - /* day of the month */ 584817 ; /* zero that on 1601-01-01 */ /* done */ Time->QuadPart = (((((LONGLONG) day * HOURSPERDAY + tfTimeFields->Hour) * MINSPERHOUR + tfTimeFields->Minute) * SECSPERMIN + tfTimeFields->Second ) * 1000 + tfTimeFields->Milliseconds ) * TICKSPERMSEC; return TRUE; } /*********************************************************************** * 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 LONG TIME_GetBias(void) { static time_t last_utc; static LONG last_bias; LONG ret; time_t utc; utc = time( NULL ); RtlEnterCriticalSection( &TIME_tz_section ); if (utc != last_utc) { RTL_TIME_ZONE_INFORMATION tzi; int is_dst = init_tz_info( &tzi ); last_utc = utc; last_bias = tzi.Bias; last_bias += is_dst ? tzi.DaylightBias : tzi.StandardBias; last_bias *= SECSPERMIN; } ret = last_bias; RtlLeaveCriticalSection( &TIME_tz_section ); return ret; } /****************************************************************************** * RtlLocalTimeToSystemTime [NTDLL.@] * * Convert a local time into system time. * * PARAMS * LocalTime [I] Local time to convert. * SystemTime [O] Destination for the converted time. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. */ NTSTATUS WINAPI RtlLocalTimeToSystemTime( const LARGE_INTEGER *LocalTime, PLARGE_INTEGER SystemTime) { LONG bias; TRACE("(%p, %p)\n", LocalTime, SystemTime); bias = TIME_GetBias(); SystemTime->QuadPart = LocalTime->QuadPart + bias * (LONGLONG)TICKSPERSEC; return STATUS_SUCCESS; } /****************************************************************************** * RtlSystemTimeToLocalTime [NTDLL.@] * * Convert a system time into a local time. * * PARAMS * SystemTime [I] System time to convert. * LocalTime [O] Destination for the converted time. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. */ NTSTATUS WINAPI RtlSystemTimeToLocalTime( const LARGE_INTEGER *SystemTime, PLARGE_INTEGER LocalTime ) { LONG bias; TRACE("(%p, %p)\n", SystemTime, LocalTime); bias = TIME_GetBias(); LocalTime->QuadPart = SystemTime->QuadPart - bias * (LONGLONG)TICKSPERSEC; return STATUS_SUCCESS; } /****************************************************************************** * RtlTimeToSecondsSince1970 [NTDLL.@] * * Convert a time into a count of seconds since 1970. * * PARAMS * Time [I] Time to convert. * Seconds [O] Destination for the converted time. * * RETURNS * Success: TRUE. * Failure: FALSE, if the resulting value will not fit in a DWORD. */ BOOLEAN WINAPI RtlTimeToSecondsSince1970( const LARGE_INTEGER *Time, LPDWORD Seconds ) { ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart; tmp = tmp / TICKSPERSEC - SECS_1601_TO_1970; if (tmp > 0xffffffff) return FALSE; *Seconds = (DWORD)tmp; return TRUE; } /****************************************************************************** * RtlTimeToSecondsSince1980 [NTDLL.@] * * Convert a time into a count of seconds since 1980. * * PARAMS * Time [I] Time to convert. * Seconds [O] Destination for the converted time. * * RETURNS * Success: TRUE. * Failure: FALSE, if the resulting value will not fit in a DWORD. */ BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *Time, LPDWORD Seconds ) { ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart; tmp = tmp / TICKSPERSEC - SECS_1601_TO_1980; if (tmp > 0xffffffff) return FALSE; *Seconds = (DWORD)tmp; return TRUE; } /****************************************************************************** * RtlSecondsSince1970ToTime [NTDLL.@] * * Convert a count of seconds since 1970 to a time. * * PARAMS * Seconds [I] Time to convert. * Time [O] Destination for the converted time. * * RETURNS * Nothing. */ void WINAPI RtlSecondsSince1970ToTime( DWORD Seconds, LARGE_INTEGER *Time ) { ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970; Time->u.LowPart = (DWORD)secs; Time->u.HighPart = (DWORD)(secs >> 32); } /****************************************************************************** * RtlSecondsSince1980ToTime [NTDLL.@] * * Convert a count of seconds since 1980 to a time. * * PARAMS * Seconds [I] Time to convert. * Time [O] Destination for the converted time. * * RETURNS * Nothing. */ void WINAPI RtlSecondsSince1980ToTime( DWORD Seconds, LARGE_INTEGER *Time ) { ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1980; Time->u.LowPart = (DWORD)secs; Time->u.HighPart = (DWORD)(secs >> 32); } /****************************************************************************** * RtlTimeToElapsedTimeFields [NTDLL.@] * * Convert a time to a count of elapsed seconds. * * PARAMS * Time [I] Time to convert. * TimeFields [O] Destination for the converted time. * * RETURNS * Nothing. */ void WINAPI RtlTimeToElapsedTimeFields( const LARGE_INTEGER *Time, PTIME_FIELDS TimeFields ) { LONGLONG time; INT rem; time = Time->QuadPart / TICKSPERSEC; TimeFields->Milliseconds = (Time->QuadPart % TICKSPERSEC) / TICKSPERMSEC; /* time is now in seconds */ TimeFields->Year = 0; TimeFields->Month = 0; TimeFields->Day = time / SECSPERDAY; /* rem is now the remaining seconds in the last day */ rem = time % SECSPERDAY; TimeFields->Second = rem % 60; rem /= 60; TimeFields->Minute = rem % 60; TimeFields->Hour = rem / 60; } /*********************************************************************** * NtQuerySystemTime [NTDLL.@] * ZwQuerySystemTime [NTDLL.@] * * Get the current system time. * * PARAMS * Time [O] Destination for the current system time. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. */ NTSTATUS WINAPI NtQuerySystemTime( PLARGE_INTEGER Time ) { struct timeval now; gettimeofday( &now, 0 ); Time->QuadPart = now.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970; Time->QuadPart += now.tv_usec * 10; return STATUS_SUCCESS; } /****************************************************************************** * NtQueryPerformanceCounter [NTDLL.@] * * Note: Windows uses a timer clocked at a multiple of 1193182 Hz. There is a * good number of applications that crash when the returned frequency is either * lower or higher than what Windows gives. Also too high counter values are * reported to give problems. */ NTSTATUS WINAPI NtQueryPerformanceCounter( PLARGE_INTEGER Counter, PLARGE_INTEGER Frequency ) { LARGE_INTEGER now; if (!Counter) return STATUS_ACCESS_VIOLATION; /* convert a counter that increments at a rate of 10 MHz * to one of 1.193182 MHz, with some care for arithmetic * overflow and good accuracy (21/176 = 0.11931818) */ NtQuerySystemTime( &now ); Counter->QuadPart = ((now.QuadPart - server_start_time) * 21) / 176; if (Frequency) Frequency->QuadPart = 1193182; return STATUS_SUCCESS; } /****************************************************************************** * NtGetTickCount (NTDLL.@) * ZwGetTickCount (NTDLL.@) */ ULONG WINAPI NtGetTickCount(void) { LARGE_INTEGER now; NtQuerySystemTime( &now ); return (now.QuadPart - server_start_time) / 10000; } /* calculate the mday of dst change date, so that for instance Sun 5 Oct 2007 * (last Sunday in October of 2007) becomes Sun Oct 28 2007 * * Note: year, day and month must be in unix format. */ static int weekday_to_mday(int year, int day, int mon, int day_of_week) { struct tm date; time_t tmp; int wday, mday; /* find first day in the month matching week day of the date */ memset(&date, 0, sizeof(date)); date.tm_year = year; date.tm_mon = mon; date.tm_mday = -1; date.tm_wday = -1; do { date.tm_mday++; tmp = mktime(&date); } while (date.tm_wday != day_of_week || date.tm_mon != mon); mday = date.tm_mday; /* find number of week days in the month matching week day of the date */ wday = 1; /* 1 - 1st, ...., 5 - last */ while (wday < day) { struct tm *tm; date.tm_mday += 7; tmp = mktime(&date); tm = localtime(&tmp); if (tm->tm_mon != mon) break; mday = tm->tm_mday; wday++; } return mday; } static BOOL match_tz_date(const RTL_SYSTEM_TIME *st, const RTL_SYSTEM_TIME *reg_st) { WORD wDay; if (st->wMonth != reg_st->wMonth) return FALSE; if (!st->wMonth) return TRUE; /* no transition dates */ wDay = reg_st->wDay; if (!reg_st->wYear) /* date in a day-of-week format */ wDay = weekday_to_mday(st->wYear - 1900, reg_st->wDay, reg_st->wMonth - 1, reg_st->wDayOfWeek); if (st->wDay != wDay || st->wHour != reg_st->wHour || st->wMinute != reg_st->wMinute || st->wSecond != reg_st->wSecond || st->wMilliseconds != reg_st->wMilliseconds) return FALSE; return TRUE; } static BOOL match_tz_info(const RTL_TIME_ZONE_INFORMATION *tzi, const RTL_TIME_ZONE_INFORMATION *reg_tzi) { if (tzi->Bias == reg_tzi->Bias && match_tz_date(&tzi->StandardDate, ®_tzi->StandardDate) && match_tz_date(&tzi->DaylightDate, ®_tzi->DaylightDate)) return TRUE; return FALSE; } static BOOL reg_query_value(HKEY hkey, LPCWSTR name, DWORD type, void *data, DWORD count) { UNICODE_STRING nameW; char buf[256]; KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)buf; if (count > sizeof(buf) - sizeof(KEY_VALUE_PARTIAL_INFORMATION)) return FALSE; RtlInitUnicodeString(&nameW, name); if (NtQueryValueKey(hkey, &nameW, KeyValuePartialInformation, buf, sizeof(buf), &count)) return FALSE; if (info->Type != type) return FALSE; memcpy(data, info->Data, info->DataLength); return TRUE; } static void find_reg_tz_info(RTL_TIME_ZONE_INFORMATION *tzi) { static const WCHAR Time_ZonesW[] = { 'M','a','c','h','i','n','e','\\', 'S','o','f','t','w','a','r','e','\\', 'M','i','c','r','o','s','o','f','t','\\', 'W','i','n','d','o','w','s',' ','N','T','\\', 'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\', 'T','i','m','e',' ','Z','o','n','e','s',0 }; HANDLE hkey; ULONG idx; OBJECT_ATTRIBUTES attr; UNICODE_STRING nameW; WCHAR buf[128]; attr.Length = sizeof(attr); attr.RootDirectory = 0; attr.ObjectName = &nameW; attr.Attributes = 0; attr.SecurityDescriptor = NULL; attr.SecurityQualityOfService = NULL; RtlInitUnicodeString(&nameW, Time_ZonesW); if (NtOpenKey(&hkey, KEY_READ, &attr)) { WARN("Unable to open the time zones key\n"); return; } idx = 0; nameW.Buffer = buf; nameW.Length = sizeof(buf); nameW.MaximumLength = sizeof(buf); while (!RtlpNtEnumerateSubKey(hkey, &nameW, idx++)) { static const WCHAR stdW[] = { 'S','t','d',0 }; static const WCHAR dltW[] = { 'D','l','t',0 }; static const WCHAR tziW[] = { 'T','Z','I',0 }; RTL_TIME_ZONE_INFORMATION reg_tzi; HANDLE hSubkey; struct tz_reg_data { LONG bias; LONG std_bias; LONG dlt_bias; RTL_SYSTEM_TIME std_date; RTL_SYSTEM_TIME dlt_date; } tz_data; attr.Length = sizeof(attr); attr.RootDirectory = hkey; attr.ObjectName = &nameW; attr.Attributes = 0; attr.SecurityDescriptor = NULL; attr.SecurityQualityOfService = NULL; if (NtOpenKey(&hSubkey, KEY_READ, &attr)) { WARN("Unable to open subkey %s\n", debugstr_wn(nameW.Buffer, nameW.Length/sizeof(WCHAR))); continue; } #define get_value(hkey, name, type, data, len) \ if (!reg_query_value(hkey, name, type, data, len)) \ { \ WARN("can't read data from %s\n", debugstr_w(name)); \ NtClose(hkey); \ continue; \ } get_value(hSubkey, stdW, REG_SZ, reg_tzi.StandardName, sizeof(reg_tzi.StandardName)); get_value(hSubkey, dltW, REG_SZ, reg_tzi.DaylightName, sizeof(reg_tzi.DaylightName)); get_value(hSubkey, tziW, REG_BINARY, &tz_data, sizeof(tz_data)); #undef get_value reg_tzi.Bias = tz_data.bias; reg_tzi.StandardBias = tz_data.std_bias; reg_tzi.DaylightBias = tz_data.dlt_bias; reg_tzi.StandardDate = tz_data.std_date; reg_tzi.DaylightDate = tz_data.dlt_date; TRACE("%s: bias %d\n", debugstr_wn(nameW.Buffer, nameW.Length/sizeof(WCHAR)), reg_tzi.Bias); TRACE("std (d/m/y): %u/%02u/%04u day of week %u %u:%02u:%02u.%03u bias %d\n", reg_tzi.StandardDate.wDay, reg_tzi.StandardDate.wMonth, reg_tzi.StandardDate.wYear, reg_tzi.StandardDate.wDayOfWeek, reg_tzi.StandardDate.wHour, reg_tzi.StandardDate.wMinute, reg_tzi.StandardDate.wSecond, reg_tzi.StandardDate.wMilliseconds, reg_tzi.StandardBias); TRACE("dst (d/m/y): %u/%02u/%04u day of week %u %u:%02u:%02u.%03u bias %d\n", reg_tzi.DaylightDate.wDay, reg_tzi.DaylightDate.wMonth, reg_tzi.DaylightDate.wYear, reg_tzi.DaylightDate.wDayOfWeek, reg_tzi.DaylightDate.wHour, reg_tzi.DaylightDate.wMinute, reg_tzi.DaylightDate.wSecond, reg_tzi.DaylightDate.wMilliseconds, reg_tzi.DaylightBias); NtClose(hSubkey); if (match_tz_info(tzi, ®_tzi)) { *tzi = reg_tzi; NtClose(hkey); return; } /* reset len */ nameW.Length = sizeof(buf); nameW.MaximumLength = sizeof(buf); } NtClose(hkey); FIXME("Can't find matching timezone information in the registry for " "bias %d, std (d/m/y): %u/%02u/%04u, dlt (d/m/y): %u/%02u/%04u\n", tzi->Bias, tzi->StandardDate.wDay, tzi->StandardDate.wMonth, tzi->StandardDate.wYear, tzi->DaylightDate.wDay, tzi->DaylightDate.wMonth, tzi->DaylightDate.wYear); } static time_t find_dst_change(unsigned long min, unsigned long max, int *is_dst) { time_t start; struct tm *tm; start = min; tm = localtime(&start); *is_dst = !tm->tm_isdst; TRACE("starting date isdst %d, %s", !*is_dst, ctime(&start)); while (min <= max) { time_t pos = (min + max) / 2; tm = localtime(&pos); if (tm->tm_isdst != *is_dst) min = pos + 1; else max = pos - 1; } return min; } static int init_tz_info(RTL_TIME_ZONE_INFORMATION *tzi) { static RTL_TIME_ZONE_INFORMATION cached_tzi; static int current_year = -1, current_bias = 65535; struct tm *tm; time_t year_start, year_end, tmp, dlt = 0, std = 0; int is_dst, current_is_dst, bias; RtlEnterCriticalSection( &TIME_tz_section ); year_start = time(NULL); tm = gmtime(&year_start); bias = (LONG)(mktime(tm) - year_start) / 60; tm = localtime(&year_start); current_is_dst = tm->tm_isdst; if (current_year == tm->tm_year && current_bias == bias) { *tzi = cached_tzi; RtlLeaveCriticalSection( &TIME_tz_section ); return current_is_dst; } memset(tzi, 0, sizeof(*tzi)); TRACE("tz data will be valid through year %d, bias %d\n", tm->tm_year + 1900, bias); current_year = tm->tm_year; current_bias = bias; tzi->Bias = bias; tm->tm_isdst = 0; tm->tm_mday = 1; tm->tm_mon = tm->tm_hour = tm->tm_min = tm->tm_sec = tm->tm_wday = tm->tm_yday = 0; year_start = mktime(tm); TRACE("year_start: %s", ctime(&year_start)); tm->tm_mday = tm->tm_wday = tm->tm_yday = 0; tm->tm_mon = 12; tm->tm_hour = 23; tm->tm_min = tm->tm_sec = 59; year_end = mktime(tm); TRACE("year_end: %s", ctime(&year_end)); tmp = find_dst_change(year_start, year_end, &is_dst); if (is_dst) dlt = tmp; else std = tmp; tmp = find_dst_change(tmp, year_end, &is_dst); if (is_dst) dlt = tmp; else std = tmp; TRACE("std: %s", ctime(&std)); TRACE("dlt: %s", ctime(&dlt)); if (dlt == std || !dlt || !std) TRACE("there is no daylight saving rules in this time zone\n"); else { tmp = dlt - tzi->Bias * 60; tm = gmtime(&tmp); TRACE("dlt gmtime: %s", asctime(tm)); tzi->DaylightBias = -60; tzi->DaylightDate.wYear = tm->tm_year + 1900; tzi->DaylightDate.wMonth = tm->tm_mon + 1; tzi->DaylightDate.wDayOfWeek = tm->tm_wday; tzi->DaylightDate.wDay = tm->tm_mday; tzi->DaylightDate.wHour = tm->tm_hour; tzi->DaylightDate.wMinute = tm->tm_min; tzi->DaylightDate.wSecond = tm->tm_sec; tzi->DaylightDate.wMilliseconds = 0; TRACE("daylight (d/m/y): %u/%02u/%04u day of week %u %u:%02u:%02u.%03u bias %d\n", tzi->DaylightDate.wDay, tzi->DaylightDate.wMonth, tzi->DaylightDate.wYear, tzi->DaylightDate.wDayOfWeek, tzi->DaylightDate.wHour, tzi->DaylightDate.wMinute, tzi->DaylightDate.wSecond, tzi->DaylightDate.wMilliseconds, tzi->DaylightBias); tmp = std - tzi->Bias * 60 - tzi->DaylightBias * 60; tm = gmtime(&tmp); TRACE("std gmtime: %s", asctime(tm)); tzi->StandardBias = 0; tzi->StandardDate.wYear = tm->tm_year + 1900; tzi->StandardDate.wMonth = tm->tm_mon + 1; tzi->StandardDate.wDayOfWeek = tm->tm_wday; tzi->StandardDate.wDay = tm->tm_mday; tzi->StandardDate.wHour = tm->tm_hour; tzi->StandardDate.wMinute = tm->tm_min; tzi->StandardDate.wSecond = tm->tm_sec; tzi->StandardDate.wMilliseconds = 0; TRACE("standard (d/m/y): %u/%02u/%04u day of week %u %u:%02u:%02u.%03u bias %d\n", tzi->StandardDate.wDay, tzi->StandardDate.wMonth, tzi->StandardDate.wYear, tzi->StandardDate.wDayOfWeek, tzi->StandardDate.wHour, tzi->StandardDate.wMinute, tzi->StandardDate.wSecond, tzi->StandardDate.wMilliseconds, tzi->StandardBias); } find_reg_tz_info(tzi); cached_tzi = *tzi; RtlLeaveCriticalSection( &TIME_tz_section ); return current_is_dst; } /*********************************************************************** * RtlQueryTimeZoneInformation [NTDLL.@] * * Get information about the current timezone. * * PARAMS * tzinfo [O] Destination for the retrieved timezone info. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. */ NTSTATUS WINAPI RtlQueryTimeZoneInformation(RTL_TIME_ZONE_INFORMATION *tzinfo) { init_tz_info( tzinfo ); return STATUS_SUCCESS; } /*********************************************************************** * RtlSetTimeZoneInformation [NTDLL.@] * * Set the current time zone information. * * PARAMS * tzinfo [I] Timezone information to set. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. * */ NTSTATUS WINAPI RtlSetTimeZoneInformation( const RTL_TIME_ZONE_INFORMATION *tzinfo ) { return STATUS_PRIVILEGE_NOT_HELD; } /*********************************************************************** * NtSetSystemTime [NTDLL.@] * ZwSetSystemTime [NTDLL.@] * * Set the system time. * * PARAMS * NewTime [I] The time to set. * OldTime [O] Optional destination for the previous system time. * * RETURNS * Success: STATUS_SUCCESS. * Failure: An NTSTATUS error code indicating the problem. */ NTSTATUS WINAPI NtSetSystemTime(const LARGE_INTEGER *NewTime, LARGE_INTEGER *OldTime) { struct timeval tv; time_t tm_t; DWORD sec, oldsec; LARGE_INTEGER tm; /* Return the old time if necessary */ if (!OldTime) OldTime = &tm; NtQuerySystemTime( OldTime ); RtlTimeToSecondsSince1970( OldTime, &oldsec ); RtlTimeToSecondsSince1970( NewTime, &sec ); /* set the new time */ tv.tv_sec = sec; tv.tv_usec = 0; #ifdef HAVE_SETTIMEOFDAY if (!settimeofday(&tv, NULL)) /* 0 is OK, -1 is error */ return STATUS_SUCCESS; tm_t = sec; ERR("Cannot set time to %s, time adjustment %ld: %s\n", ctime(&tm_t), (long)(sec-oldsec), strerror(errno)); if (errno == EPERM) return STATUS_PRIVILEGE_NOT_HELD; else return STATUS_INVALID_PARAMETER; #else tm_t = sec; FIXME("setting time to %s not implemented for missing settimeofday\n", ctime(&tm_t)); return STATUS_NOT_IMPLEMENTED; #endif }