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      1 /*
      2  * Copyright (C) 2012 Patrick Gansterer <paroga (at) paroga.com>
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #include "config.h"
     26 #include "GregorianDateTime.h"
     27 
     28 #include "DateMath.h"
     29 
     30 #if OS(WINDOWS)
     31 #include <windows.h>
     32 #else
     33 #include <time.h>
     34 #endif
     35 
     36 namespace WTF {
     37 
     38 void GregorianDateTime::setToCurrentLocalTime()
     39 {
     40 #if OS(WINDOWS)
     41     SYSTEMTIME systemTime;
     42     GetLocalTime(&systemTime);
     43     TIME_ZONE_INFORMATION timeZoneInformation;
     44     DWORD timeZoneId = GetTimeZoneInformation(&timeZoneInformation);
     45 
     46     LONG bias = timeZoneInformation.Bias;
     47     if (timeZoneId == TIME_ZONE_ID_DAYLIGHT)
     48         bias += timeZoneInformation.DaylightBias;
     49     else if (timeZoneId == TIME_ZONE_ID_STANDARD)
     50         bias += timeZoneInformation.StandardBias;
     51     else
     52         ASSERT(timeZoneId == TIME_ZONE_ID_UNKNOWN);
     53 
     54     m_year = systemTime.wYear;
     55     m_month = systemTime.wMonth - 1;
     56     m_monthDay = systemTime.wDay;
     57     m_yearDay = dayInYear(m_year, m_month, m_monthDay);
     58     m_weekDay = systemTime.wDayOfWeek;
     59     m_hour = systemTime.wHour;
     60     m_minute = systemTime.wMinute;
     61     m_second = systemTime.wSecond;
     62     m_utcOffset = -bias * secondsPerMinute;
     63     m_isDST = timeZoneId == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
     64 #else
     65     tm localTM;
     66     time_t localTime = time(0);
     67     localtime_r(&localTime, &localTM);
     68 
     69     m_year = localTM.tm_year + 1900;
     70     m_month = localTM.tm_mon;
     71     m_monthDay = localTM.tm_mday;
     72     m_yearDay = localTM.tm_yday;
     73     m_weekDay = localTM.tm_wday;
     74     m_hour = localTM.tm_hour;
     75     m_minute = localTM.tm_min;
     76     m_second = localTM.tm_sec;
     77     m_isDST = localTM.tm_isdst;
     78 #if HAVE(TM_GMTOFF)
     79     m_utcOffset = localTM.tm_gmtoff;
     80 #else
     81     int utcOffset = calculateUTCOffset();
     82     utcOffset += calculateDSTOffset(localTime * msPerSecond, utcOffset);
     83     m_utcOffset = utcOffset / msPerSecond;
     84 #endif
     85 #endif
     86 }
     87 
     88 } // namespace WTF
     89