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
  20 #include <sal/config.h>
  21
  22 #include <chrono>
  23 #include <time.h>
  24
  25 #include <systemdatetime.hxx>
  26
  27 namespace
  28 {
  29 constexpr sal_Int32 ConvertYMDToInt(sal_Int32 nYear, sal_Int32 nMonth, sal_Int32 nDay)
  30 {
  31     return (nYear * 10000) + (nMonth * 100) + nDay;
  32 }
  33
  34 constexpr sal_Int64 ConvertHMSnToInt(sal_Int64 nHour, sal_Int64 nMin, sal_Int64 nSec,
  35                                      sal_Int64 nNanoSec)
  36 {
  37     return (nHour * HOUR_MASK) + (nMin * MIN_MASK) + (nSec * SEC_MASK) + nNanoSec;
  38 }
  39 }
  40
  41 bool GetSystemDateTime(sal_Int32* pDate, sal_Int64* pTime)
  42 {
  43     auto tp = std::chrono::system_clock::now();
  44     const time_t nTmpTime = std::chrono::system_clock::to_time_t(tp);
  45     struct tm aTime;
  46 #if defined(_WIN32)
  47     bool ok = localtime_s(&aTime, &nTmpTime) == 0;
  48 #else
  49     bool ok = localtime_r(&nTmpTime, &aTime) != nullptr;
  50 #endif
  51     if (ok)
  52     {
  53         if (pDate)
  54             *pDate = ConvertYMDToInt(static_cast<sal_Int32>(aTime.tm_year + 1900),
  55                                      static_cast<sal_Int32>(aTime.tm_mon + 1),
  56                                      static_cast<sal_Int32>(aTime.tm_mday));
  57         if (pTime)
  58         {
  59             auto hms = std::chrono::hh_mm_ss(std::chrono::floor<std::chrono::nanoseconds>(
  60                 tp - std::chrono::floor<std::chrono::days>(tp)));
  61             auto ns = hms.subseconds().count();
  62             *pTime = ConvertHMSnToInt(aTime.tm_hour, aTime.tm_min, aTime.tm_sec, ns);
  63         }
  64         return true;
  65     }
  66
  67     return false;
  68 }
  69
  70 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */