gettimeofday.cc

/*
 * Copyright 2008, 2009, 2010,
 *
 * Francois   Keith
 * Olivier    Stasse
 *
 * JRL, CNRS/AIST
 *
 * This file is part of walkGenJrl.
 * walkGenJrl 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 3 of the License, or
 * (at your option) any later version.
 *
 * walkGenJrl 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 General Lesser Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License
 * along with walkGenJrl.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  Research carried out within the scope of the
 *  Joint Japanese-French Robotics Laboratory (JRL)
 */
#ifdef WIN32
# include "gettimeofday.hh"

# include <Windows.h>
# if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
#  define DELTA_EPOCH_IN_MICROSECS  11644473600000000Ui64
# else
#  define DELTA_EPOCH_IN_MICROSECS  11644473600000000ULL
# endif

int gettimeofday(struct timeval *tv, struct timezone *tz)
{
  FILETIME ft;
  unsigned __int64 tmpres = 0;
  static int tzflag;

  if (NULL != tv)
    {
      GetSystemTimeAsFileTime(&ft);

      tmpres |= ft.dwHighDateTime;
      tmpres <<= 32;
      tmpres |= ft.dwLowDateTime;

      /*converting file time to unix epoch*/
      tmpres /= 10;  /*convert into microseconds*/
      tmpres -= DELTA_EPOCH_IN_MICROSECS;
      tv->tv_sec = (long)(tmpres / 1000000UL);
      tv->tv_usec = (long)(tmpres % 1000000UL);
    }

  if (NULL != tz)
    {
      if (!tzflag)
	{
	  _tzset();
	  tzflag++;
	}
      tz->tz_minuteswest = _timezone / 60;
      tz->tz_dsttime = _daylight;
    }

  return 0;
}

#endif /*WIN32*/