sal/osl/w32/time.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21 #include "assert.h"
  22 #include "system.h"
  23
  24 #include "filetime.hxx"
  25 #include "time.hxx"
  26
  27 #include <osl/diagnose.h>
  28 #include <osl/time.h>
  29 #include <sys/timeb.h>
  30
  31 sal_Bool SAL_CALL osl_getSystemTime(TimeValue* pTimeVal)
  32 {
  33     unsigned __int64 CurTime;
  34
  35     typedef VOID (WINAPI *GetSystemTimePreciseAsFileTime_PROC)(LPFILETIME);
  36
  37     assert(pTimeVal != nullptr);
  38
  39     static GetSystemTimePreciseAsFileTime_PROC pGetSystemTimePreciseAsFileTime = []()
  40     {
  41         HMODULE hModule = GetModuleHandleW( L"Kernel32.dll" );
  42         return reinterpret_cast<GetSystemTimePreciseAsFileTime_PROC>(
  43                 GetProcAddress(hModule, "GetSystemTimePreciseAsFileTime"));
  44     }();
  45
  46     // use ~1 microsecond resolution if available
  47     if (pGetSystemTimePreciseAsFileTime)
  48         pGetSystemTimePreciseAsFileTime(reinterpret_cast<LPFILETIME>(&CurTime));
  49     else
  50     {
  51         SYSTEMTIME SystemTime;
  52         GetSystemTime(&SystemTime);
  53         SystemTimeToFileTime(&SystemTime, reinterpret_cast<LPFILETIME>(&CurTime));
  54     }
  55
  56     static const unsigned __int64 OffTime = [] {
  57         SYSTEMTIME SystemTime;
  58         SystemTime.wYear = 1970;
  59         SystemTime.wMonth = 1;
  60         SystemTime.wDayOfWeek = 0;
  61         SystemTime.wDay = 1;
  62         SystemTime.wHour = 0;
  63         SystemTime.wMinute = 0;
  64         SystemTime.wSecond = 0;
  65         SystemTime.wMilliseconds = 0;
  66
  67         unsigned __int64 ft;
  68         SystemTimeToFileTime(&SystemTime, reinterpret_cast<LPFILETIME>(&ft));
  69         return ft;
  70     }();
  71
  72     const unsigned __int64 Value = CurTime - OffTime;
  73
  74     pTimeVal->Seconds  = static_cast<unsigned long>(Value / 10000000L);
  75     pTimeVal->Nanosec  = static_cast<unsigned long>((Value % 10000000L) * 100);
  76
  77     return true;
  78 }
  79
  80 sal_Bool SAL_CALL osl_getDateTimeFromTimeValue( const TimeValue* pTimeVal, oslDateTime* pDateTime )
  81 {
  82     FILETIME    aFileTime;
  83     SYSTEMTIME  aSystemTime;
  84
  85     if ( TimeValueToFileTime(pTimeVal, &aFileTime) )
  86     {
  87         if ( FileTimeToSystemTime( &aFileTime, &aSystemTime ) )
  88         {
  89             pDateTime->NanoSeconds  =   pTimeVal->Nanosec;
  90
  91             pDateTime->Seconds      =   aSystemTime.wSecond;
  92             pDateTime->Minutes      =   aSystemTime.wMinute;
  93             pDateTime->Hours        =   aSystemTime.wHour;
  94             pDateTime->Day          =   aSystemTime.wDay;
  95             pDateTime->DayOfWeek    =   aSystemTime.wDayOfWeek;
  96             pDateTime->Month        =   aSystemTime.wMonth;
  97             pDateTime->Year         =   aSystemTime.wYear;
  98
  99             return true;
 100         }
 101     }
 102
 103     return false;
 104 }
 105
 106 sal_Bool SAL_CALL osl_getTimeValueFromDateTime( const oslDateTime* pDateTime, TimeValue* pTimeVal )
 107 {
 108     FILETIME    aFileTime;
 109     SYSTEMTIME  aSystemTime;
 110
 111     aSystemTime.wMilliseconds   =   0;
 112     aSystemTime.wSecond         =   pDateTime->Seconds;
 113     aSystemTime.wMinute         =   pDateTime->Minutes;
 114     aSystemTime.wHour           =   pDateTime->Hours;
 115     aSystemTime.wDay            =   pDateTime->Day;
 116     aSystemTime.wDayOfWeek      =   pDateTime->DayOfWeek;
 117     aSystemTime.wMonth          =   pDateTime->Month;
 118     aSystemTime.wYear           =   pDateTime->Year;
 119
 120     if ( SystemTimeToFileTime( &aSystemTime, &aFileTime ) )
 121     {
 122         if (FileTimeToTimeValue( &aFileTime, pTimeVal  ) )
 123         {
 124             pTimeVal->Nanosec = pDateTime->NanoSeconds;
 125             return true;
 126         }
 127     }
 128
 129     return false;
 130 }
 131
 132 sal_Bool SAL_CALL osl_getLocalTimeFromSystemTime( const TimeValue* pSystemTimeVal, TimeValue* pLocalTimeVal )
 133 {
 134     TIME_ZONE_INFORMATION aTimeZoneInformation;
 135
 136     // get timezone information
 137     DWORD Success = GetTimeZoneInformation( &aTimeZoneInformation );
 138     if (Success == TIME_ZONE_ID_INVALID)
 139         return false;
 140
 141     sal_Int64 bias = aTimeZoneInformation.Bias;
 142
 143     // add bias for daylight saving time
 144     if ( Success == TIME_ZONE_ID_DAYLIGHT )
 145         bias+=aTimeZoneInformation.DaylightBias;
 146
 147     if ( static_cast<sal_Int64>(pSystemTimeVal->Seconds) > ( bias * 60 ) )
 148     {
 149         pLocalTimeVal->Seconds = static_cast<sal_uInt32>(pSystemTimeVal->Seconds - ( bias * 60) );
 150         pLocalTimeVal->Nanosec = pSystemTimeVal->Nanosec;
 151
 152         return true;
 153     }
 154     return false;
 155 }
 156
 157 sal_Bool SAL_CALL osl_getSystemTimeFromLocalTime( const TimeValue* pLocalTimeVal, TimeValue* pSystemTimeVal )
 158 {
 159     TIME_ZONE_INFORMATION aTimeZoneInformation;
 160
 161     // get timezone information
 162     DWORD Success = GetTimeZoneInformation( &aTimeZoneInformation );
 163     if ( Success == TIME_ZONE_ID_INVALID )
 164         return false;
 165
 166     sal_Int64 bias = aTimeZoneInformation.Bias;
 167
 168     // add bias for daylight saving time
 169     if ( Success == TIME_ZONE_ID_DAYLIGHT )
 170         bias+=aTimeZoneInformation.DaylightBias;
 171
 172     if ( static_cast<sal_Int64>(pLocalTimeVal->Seconds) + ( bias * 60 ) > 0 )
 173     {
 174         pSystemTimeVal->Seconds = static_cast<sal_uInt32>( pLocalTimeVal->Seconds + ( bias * 60) );
 175         pSystemTimeVal->Nanosec = pLocalTimeVal->Nanosec;
 176
 177         return true;
 178     }
 179
 180     return false;
 181 }
 182
 183 static struct _timeb startTime;
 184 void sal_initGlobalTimer()
 185 {
 186     _ftime( &startTime );
 187 }
 188
 189 sal_uInt32 SAL_CALL osl_getGlobalTimer(void)
 190 {
 191   struct _timeb currentTime;
 192   sal_uInt32 nSeconds;
 193
 194   _ftime( &currentTime );
 195
 196   nSeconds = static_cast<sal_uInt32>( currentTime.time - startTime.time );
 197
 198   return ( nSeconds * 1000 ) + static_cast<long>( currentTime.millitm - startTime.millitm );
 199 }
 200
 201 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */