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wine/dlls/ntdll/time.c
Andrew Talbot 5ecd33e2f9 ntdll: Assign to structs instead of using memcpy.
2008-03-10 11:23:30 +01:00

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/*
* 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 <stdarg.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#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 = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
tmp -= 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 = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
tmp -= 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 = 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.@]
*
* 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, &reg_tzi->StandardDate) &&
match_tz_date(&tzi->DaylightDate, &reg_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, &reg_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;
struct tm *tm;
time_t year_start, year_end, tmp, dlt = 0, std = 0;
int is_dst, current_is_dst;
RtlEnterCriticalSection( &TIME_tz_section );
year_start = time(NULL);
tm = localtime(&year_start);
current_is_dst = tm->tm_isdst;
if (current_year == tm->tm_year)
{
*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\n", tm->tm_year + 1900);
current_year = tm->tm_year;
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));
tm = gmtime(&year_start);
tzi->Bias = (LONG)(mktime(tm) - year_start) / 60;
TRACE("bias: %d\n", tzi->Bias);
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
}
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