inference-engine/thirdparty/clDNN/common/boost/1.64.0/include/boost-1_64/boost/date_time/c_local_time_adjustor.hpp

   1 #ifndef DATE_TIME_C_LOCAL_TIME_ADJUSTOR_HPP__
   2 #define DATE_TIME_C_LOCAL_TIME_ADJUSTOR_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 c_local_time_adjustor.hpp
  13   Time adjustment calculations based on machine
  14 */
  15
  16 #include <stdexcept>
  17 #include <boost/throw_exception.hpp>
  18 #include <boost/date_time/compiler_config.hpp>
  19 #include <boost/date_time/c_time.hpp>
  20
  21 namespace boost {
  22 namespace date_time {
  23
  24   //! Adjust to / from utc using the C API
  25   /*! Warning!!! This class assumes that timezone settings of the
  26    *  machine are correct.  This can be a very dangerous assumption.
  27    */
  28   template<class time_type>
  29   class c_local_adjustor {
  30   public:
  31     typedef typename time_type::time_duration_type time_duration_type;
  32     typedef typename time_type::date_type date_type;
  33     typedef typename date_type::duration_type date_duration_type;
  34     //! Convert a utc time to local time
  35     static time_type utc_to_local(const time_type& t)
  36     {
  37       date_type time_t_start_day(1970,1,1);
  38       time_type time_t_start_time(time_t_start_day,time_duration_type(0,0,0));
  39       if (t < time_t_start_time) {
  40         boost::throw_exception(std::out_of_range("Cannot convert dates prior to Jan 1, 1970"));
  41         BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(return time_t_start_time); // should never reach
  42       }
  43       date_duration_type dd = t.date() - time_t_start_day;
  44       time_duration_type td = t.time_of_day();
  45       std::time_t t2 = static_cast<std::time_t>(dd.days())*86400 +
  46                        static_cast<std::time_t>(td.hours())*3600 +
  47                        static_cast<std::time_t>(td.minutes())*60 +
  48                        td.seconds();
  49       std::tm tms, *tms_ptr;
  50       tms_ptr = c_time::localtime(&t2, &tms);
  51       date_type d(static_cast<unsigned short>(tms_ptr->tm_year + 1900),
  52                   static_cast<unsigned short>(tms_ptr->tm_mon + 1),
  53                   static_cast<unsigned short>(tms_ptr->tm_mday));
  54       time_duration_type td2(tms_ptr->tm_hour,
  55                              tms_ptr->tm_min,
  56                              tms_ptr->tm_sec,
  57                              t.time_of_day().fractional_seconds());
  58
  59       return time_type(d,td2);
  60     }
  61   };
  62
  63
  64
  65 } } //namespace date_time
  66
  67
  68
  69 #endif