#ifndef DATE_CLOCK_DEVICE_HPP___

#define DATE_CLOCK_DEVICE_HPP___



/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.

 * Use, modification and distribution is subject to the 

 * Boost Software License, Version 1.0. (See accompanying

 * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)

 * Author: Jeff Garland, Bart Garst

 * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $

 */



#include "boost/date_time/c_time.hpp"





namespace boost {

namespace date_time {



  //! A clock providing day level services based on C time_t capabilities

  /*! This clock uses Posix interfaces as its implementation and hence

   *  uses the timezone settings of the operating system.  Incorrect

   *  user settings will result in incorrect results for the calls

   *  to local_day.

   */

  template<class date_type> 

  class day_clock

  {

  public:

    typedef typename date_type::ymd_type ymd_type;

    //! Get the local day as a date type

    static date_type local_day() 

    {

      return date_type(local_day_ymd());

    }

    //! Get the local day as a ymd_type

    static typename date_type::ymd_type local_day_ymd() 

    {

      ::std::tm result;

      ::std::tm* curr = get_local_time(result);

      return ymd_type(curr->tm_year + 1900, 

                      curr->tm_mon + 1, 

                      curr->tm_mday);

    }

    //! Get the current day in universal date as a ymd_type

    static typename date_type::ymd_type universal_day_ymd() 

    {

      ::std::tm result;

      ::std::tm* curr = get_universal_time(result);

      return ymd_type(curr->tm_year + 1900, 

                      curr->tm_mon + 1, 

                      curr->tm_mday);

    }

    //! Get the UTC day as a date type

    static date_type universal_day() 

    {

      return date_type(universal_day_ymd());

    }



  private:

    static ::std::tm* get_local_time(std::tm& result) 

    {

      ::std::time_t t;

      ::std::time(&t);

      return c_time::localtime(&t, &result);

    }

    static ::std::tm* get_universal_time(std::tm& result) 

    {

      ::std::time_t t;

      ::std::time(&t);

      return c_time::gmtime(&t, &result);

    }



  };



} } //namespace date_time





#endif

