tools/source/datetime/systemdatetime.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   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 #if defined(_WIN32)
  20 #if !defined WIN32_LEAN_AND_MEAN
  21 #define WIN32_LEAN_AND_MEAN
  22 #endif
  23 #include <windows.h>
  24 #elif defined UNX
  25 #include <unistd.h>
  26 #include <sys/time.h>
  27 #endif
  28
  29 #include <time.h>
  30 #ifdef __MACH__
  31 #include <mach/clock.h>
  32 #include <mach/mach.h>
  33 #include <mach/mach_time.h>
  34 #endif
  35
  36 #include <rtl/math.hxx>
  37 #include <osl/diagnose.h>
  38 #include <systemdatetime.hxx>
  39
  40 namespace
  41 {
  42 constexpr sal_Int32 ConvertYMDToInt(sal_Int32 nYear, sal_Int32 nMonth, sal_Int32 nDay)
  43 {
  44     return (nYear * 10000) + (nMonth * 100) + nDay;
  45 }
  46
  47 constexpr sal_Int64 ConvertHMSnToInt(sal_Int64 nHour, sal_Int64 nMin, sal_Int64 nSec,
  48                                      sal_Int64 nNanoSec)
  49 {
  50     return (nHour * HOUR_MASK) + (nMin * MIN_MASK) + (nSec * SEC_MASK) + nNanoSec;
  51 }
  52 }
  53
  54 bool GetSystemDateTime(sal_Int32* pDate, sal_Int64* pTime)
  55 {
  56 #if defined(_WIN32)
  57     SYSTEMTIME aDateTime;
  58     GetLocalTime(&aDateTime);
  59
  60     if (pDate)
  61         *pDate = ConvertYMDToInt(static_cast<sal_Int32>(aDateTime.wYear),
  62                                  static_cast<sal_Int32>(aDateTime.wMonth),
  63                                  static_cast<sal_Int32>(aDateTime.wDay));
  64     if (pTime)
  65         *pTime = ConvertHMSnToInt(aDateTime.wHour, aDateTime.wMinute, aDateTime.wSecond,
  66                                   aDateTime.wMilliseconds * 1000000);
  67
  68     return true;
  69 #else
  70     struct timespec tsTime;
  71 #if defined(__MACH__)
  72     // OS X does not have clock_gettime, use clock_get_time
  73     clock_serv_t cclock;
  74     mach_timespec_t mts;
  75     host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
  76     clock_get_time(cclock, &mts);
  77     mach_port_deallocate(mach_task_self(), cclock);
  78     tsTime.tv_sec = mts.tv_sec;
  79     tsTime.tv_nsec = mts.tv_nsec;
  80 #else
  81     // CLOCK_REALTIME should be supported
  82     // on any modern Unix, but be extra cautious
  83     if (clock_gettime(CLOCK_REALTIME, &tsTime) != 0)
  84     {
  85         struct timeval tvTime;
  86         OSL_VERIFY(gettimeofday(&tvTime, nullptr) != 0);
  87         tsTime.tv_sec = tvTime.tv_sec;
  88         tsTime.tv_nsec = tvTime.tv_usec * 1000;
  89     }
  90 #endif
  91
  92     struct tm aTime;
  93     time_t nTmpTime = tsTime.tv_sec;
  94     if (localtime_r(&nTmpTime, &aTime))
  95     {
  96         if (pDate)
  97             *pDate = ConvertYMDToInt(static_cast<sal_Int32>(aTime.tm_year + 1900),
  98                                      static_cast<sal_Int32>(aTime.tm_mon + 1),
  99                                      static_cast<sal_Int32>(aTime.tm_mday));
 100         if (pTime)
 101             *pTime = ConvertHMSnToInt(aTime.tm_hour, aTime.tm_min, aTime.tm_sec, tsTime.tv_nsec);
 102         return true;
 103     }
 104
 105     return false;
 106 #endif
 107 }
 108
 109 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */