boost/date_time/time_clock.hpp

   1 #ifndef DATE_TIME_TIME_CLOCK_HPP___
   2 #define DATE_TIME_TIME_CLOCK_HPP___
   3
   4 /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
   5  * Use, modification and distribution is subject to the
   6  * Boost Software License, Version 1.0. (See accompanying
   7  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
   8  * Author: Jeff Garland, Bart Garst
   9  * $Date$
  10  */
  11
  12 /*! @file time_clock.hpp
  13   This file contains the interface for clock devices.
  14 */
  15
  16 #include "boost/date_time/c_time.hpp"
  17 #include "boost/shared_ptr.hpp"
  18
  19 namespace boost {
  20 namespace date_time {
  21
  22
  23   //! A clock providing time level services based on C time_t capabilities
  24   /*! This clock provides resolution to the 1 second level
  25    */
  26   template<class time_type>
  27   class second_clock
  28   {
  29   public:
  30     typedef typename time_type::date_type date_type;
  31     typedef typename time_type::time_duration_type time_duration_type;
  32
  33     static time_type local_time()
  34     {
  35       ::std::time_t t;
  36       ::std::time(&t);
  37       ::std::tm curr, *curr_ptr;
  38       //curr_ptr = ::std::localtime(&t);
  39       curr_ptr = c_time::localtime(&t, &curr);
  40       return create_time(curr_ptr);
  41     }
  42
  43
  44     //! Get the current day in universal date as a ymd_type
  45     static time_type universal_time()
  46     {
  47
  48       ::std::time_t t;
  49       ::std::time(&t);
  50       ::std::tm curr, *curr_ptr;
  51       //curr_ptr = ::std::gmtime(&t);
  52       curr_ptr = c_time::gmtime(&t, &curr);
  53       return create_time(curr_ptr);
  54     }
  55
  56     template<class time_zone_type>
  57     static time_type local_time(boost::shared_ptr<time_zone_type> tz_ptr)
  58     {
  59       typedef typename time_type::utc_time_type utc_time_type;
  60       utc_time_type utc_time = second_clock<utc_time_type>::universal_time();
  61       return time_type(utc_time, tz_ptr);
  62     }
  63
  64
  65   private:
  66     static time_type create_time(::std::tm* current)
  67     {
  68       date_type d(static_cast<unsigned short>(current->tm_year + 1900),
  69                   static_cast<unsigned short>(current->tm_mon + 1),
  70                   static_cast<unsigned short>(current->tm_mday));
  71       time_duration_type td(current->tm_hour,
  72                             current->tm_min,
  73                             current->tm_sec);
  74       return time_type(d,td);
  75     }
  76
  77   };
  78
  79
  80 } } //namespace date_time
  81
  82
  83 #endif