include/wipal/wifi/time_converter.hxx

/*
 * WiPal - A library and a set of tools to manipulate wireless traces.
 * Copyright (C) 2007, 2008, 2009  Universite Pierre et Marie Curie - Paris 6
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301  USA
 *
 * Author: Thomas Claveirole <thomas.claveirole@lip6.fr>
 */
#ifndef WIFI_TIME_CONVERTER_HXX_
# define WIFI_TIME_CONVERTER_HXX_

extern "C"
{
# include <sys/time.h>
}

# include "time_converter.hh"

namespace wpl
{

  namespace wifi
  {

    template <class PHT, class Bottom>
    time_converter<PHT, Bottom>::
    time_converter(const pcap_time_type&                local_pcap_time,
                   const phy_time_type&         local_phy_time,
                   const tool::microseconds&    global_time):
      super_type (),
      local_reference_ (local_pcap_time, local_phy_time),
      global_reference_ (global_time)
    {
    }

    template <class PHT, class Bottom>
    time_converter<PHT, Bottom>::time_values::time_values()
    {
    }

    template <class PHT, class Bottom>
    time_converter<PHT, Bottom>::
    time_values::time_values(const pcap_time_type&      pcap_time,
                             const phy_time_type&               phy_time):
      pcap_time (pcap_time),
      phy_time (phy_time)
    {
    }

    template <class PHT, class Bottom>
    typename time_converter<PHT, Bottom>::time_values
    time_converter<PHT, Bottom>::
    operator () (const tool::microseconds& global_time) const
    {
      const tool::microseconds  dt = global_time - global_reference_;
      const struct timeval      dt_tv = dt.get_timeval();
      time_values               r;

      timeradd(&local_reference_.pcap_time, &dt_tv, &r.pcap_time);
      r.phy_time = local_reference_.phy_time + dt;

      return r;
    }

  } // End of namespace wpl::wifi.

} // End of namespace wpl.

#endif // ! WIFI_TIME_CONVERTER_HXX_

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