Chris@16: #ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP
Chris@16: #define DATE_TIME_TIME_SYSTEM_SPLIT_HPP
Chris@16: 
Chris@16: /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
Chris@16:  * Use, modification and distribution is subject to the 
Chris@16:  * Boost Software License, Version 1.0. (See accompanying
Chris@16:  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  * Author: Jeff Garland, Bart Garst
Chris@101:  * $Date$
Chris@16:  */
Chris@16: 
Chris@16: 
Chris@16: #include <string>
Chris@16: #include "boost/date_time/compiler_config.hpp"
Chris@16: #include "boost/date_time/special_defs.hpp"
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace date_time {
Chris@16: 
Chris@16:   //! An unadjusted time system implementation.
Chris@16: #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))  
Chris@16:   template<typename config, boost::int32_t ticks_per_second>
Chris@16: #else
Chris@16:   template<typename config>
Chris@16: #endif
Chris@16:   class split_timedate_system
Chris@16:   {
Chris@16:    public:
Chris@16:     typedef typename config::time_rep_type time_rep_type;
Chris@16:     typedef typename config::date_type     date_type;
Chris@16:     typedef typename config::time_duration_type time_duration_type;
Chris@16:     typedef typename config::date_duration_type date_duration_type;
Chris@16:     typedef typename config::int_type int_type;
Chris@16:     typedef typename config::resolution_traits   resolution_traits;
Chris@16: 
Chris@16:     //86400 is number of seconds in a day...
Chris@16: #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))  
Chris@16:     typedef date_time::wrapping_int<int_type, INT64_C(86400) * ticks_per_second > wrap_int_type;
Chris@16: #else
Chris@16:    private:
Chris@16:      BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second);
Chris@16:    public:
Chris@16: # if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0X581) )
Chris@16:     typedef date_time::wrapping_int< split_timedate_system::int_type, split_timedate_system::ticks_per_day> wrap_int_type;
Chris@16: # else
Chris@16:     typedef date_time::wrapping_int<int_type, ticks_per_day> wrap_int_type;
Chris@16: #endif
Chris@16: #endif
Chris@16: 
Chris@16:     static time_rep_type get_time_rep(special_values sv)
Chris@16:     {
Chris@16:       switch (sv) {
Chris@16:       case not_a_date_time:
Chris@16:         return time_rep_type(date_type(not_a_date_time),
Chris@16:                              time_duration_type(not_a_date_time));
Chris@16:       case pos_infin:
Chris@16:         return time_rep_type(date_type(pos_infin), 
Chris@16:                              time_duration_type(pos_infin));
Chris@16:       case neg_infin:
Chris@16:         return time_rep_type(date_type(neg_infin), 
Chris@16:                              time_duration_type(neg_infin));
Chris@16:       case max_date_time: {
Chris@16:         time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
Chris@16:         return time_rep_type(date_type(max_date_time), td);
Chris@16:       }
Chris@16:       case min_date_time:
Chris@16:         return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
Chris@16: 
Chris@16:       default:
Chris@16:         return time_rep_type(date_type(not_a_date_time),
Chris@16:                              time_duration_type(not_a_date_time));
Chris@16:         
Chris@16:       }
Chris@16: 
Chris@16:     }
Chris@16: 
Chris@16:     static time_rep_type get_time_rep(const date_type& day,
Chris@16:                                       const time_duration_type& tod,
Chris@16:                                       date_time::dst_flags /* dst */ = not_dst)
Chris@16:     {
Chris@16:       if(day.is_special() || tod.is_special()) {
Chris@16:         if(day.is_not_a_date() || tod.is_not_a_date_time()) {
Chris@16:           return time_rep_type(date_type(not_a_date_time),
Chris@16:                                time_duration_type(not_a_date_time));
Chris@16:         }
Chris@16:         else if(day.is_pos_infinity()) {
Chris@16:           if(tod.is_neg_infinity()) {
Chris@16:             return time_rep_type(date_type(not_a_date_time),
Chris@16:                                  time_duration_type(not_a_date_time));
Chris@16:           }
Chris@16:           else {
Chris@16:             return time_rep_type(day, time_duration_type(pos_infin));
Chris@16:           }
Chris@16:         }
Chris@16:         else if(day.is_neg_infinity()) {
Chris@16:           if(tod.is_pos_infinity()) {
Chris@16:             return time_rep_type(date_type(not_a_date_time),
Chris@16:                                  time_duration_type(not_a_date_time));
Chris@16:           }
Chris@16:           else {
Chris@16:             return time_rep_type(day, time_duration_type(neg_infin));
Chris@16:           }
Chris@16:         }
Chris@16:         else if(tod.is_pos_infinity()) {
Chris@16:           if(day.is_neg_infinity()) {
Chris@16:             return time_rep_type(date_type(not_a_date_time),
Chris@16:                                  time_duration_type(not_a_date_time));
Chris@16:           }
Chris@16:           else {
Chris@16:             return time_rep_type(date_type(pos_infin), tod);
Chris@16:           }
Chris@16:         }
Chris@16:         else if(tod.is_neg_infinity()) {
Chris@16:           if(day.is_pos_infinity()) {
Chris@16:             return time_rep_type(date_type(not_a_date_time),
Chris@16:                                  time_duration_type(not_a_date_time));
Chris@16:           }
Chris@16:           else {
Chris@16:             return time_rep_type(date_type(neg_infin), tod);
Chris@16:           }
Chris@16:         }
Chris@16:       }
Chris@16:       return time_rep_type(day, tod);
Chris@16:     }
Chris@16:     static date_type get_date(const time_rep_type& val)
Chris@16:     {
Chris@16:       return date_type(val.day);
Chris@16:     }
Chris@16:     static time_duration_type get_time_of_day(const time_rep_type& val)
Chris@16:     {
Chris@16:       return time_duration_type(val.time_of_day);
Chris@16:     }
Chris@16:     static std::string zone_name(const time_rep_type&)
Chris@16:     {
Chris@16:       return std::string();
Chris@16:     }
Chris@16:     static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
Chris@16:     {
Chris@16:       return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day));
Chris@16:     }
Chris@16:     static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
Chris@16:     {
Chris@16:       if (lhs.day < rhs.day) return true;
Chris@16:       if (lhs.day > rhs.day) return false;
Chris@16:       return (lhs.time_of_day < rhs.time_of_day);
Chris@16:     }
Chris@16:     static time_rep_type add_days(const time_rep_type& base,
Chris@16:                                   const date_duration_type& dd)
Chris@16:     {
Chris@16:       return time_rep_type(base.day+dd, base.time_of_day);
Chris@16:     }
Chris@16:     static time_rep_type subtract_days(const time_rep_type& base,
Chris@16:                                        const date_duration_type& dd)
Chris@16:     {
Chris@16:       return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day);
Chris@16:     }
Chris@16:     static time_rep_type subtract_time_duration(const time_rep_type& base,
Chris@16:                                                 const time_duration_type& td)
Chris@16:     {
Chris@16:       if(base.day.is_special() || td.is_special())
Chris@16:       {
Chris@16:         return split_timedate_system::get_time_rep(base.day, -td);
Chris@16:       }
Chris@16:       if (td.is_negative()) {
Chris@16:         time_duration_type td1 = td.invert_sign();
Chris@16:         return add_time_duration(base,td1);
Chris@16:       }
Chris@16: 
Chris@16:       wrap_int_type  day_offset(base.time_of_day.ticks());
Chris@16:       date_duration_type day_overflow(static_cast<typename date_duration_type::duration_rep_type>(day_offset.subtract(td.ticks())));
Chris@16: 
Chris@16:       return time_rep_type(base.day-day_overflow,
Chris@16:                            time_duration_type(0,0,0,day_offset.as_int()));
Chris@16:     }
Chris@16:     static time_rep_type add_time_duration(const time_rep_type& base,
Chris@16:                                            time_duration_type td)
Chris@16:     {
Chris@16:       if(base.day.is_special() || td.is_special()) {
Chris@16:         return split_timedate_system::get_time_rep(base.day, td);
Chris@16:       }
Chris@16:       if (td.is_negative()) {
Chris@16:         time_duration_type td1 = td.invert_sign();
Chris@16:         return subtract_time_duration(base,td1);
Chris@16:       }
Chris@16: 
Chris@16:       wrap_int_type day_offset(base.time_of_day.ticks());      
Chris@16:       date_duration_type day_overflow(static_cast< typename date_duration_type::duration_rep_type >(day_offset.add(td.ticks())));
Chris@16: 
Chris@16:       return time_rep_type(base.day+day_overflow,
Chris@16:                            time_duration_type(0,0,0,day_offset.as_int()));
Chris@16:     }
Chris@16:     static time_duration_type subtract_times(const time_rep_type& lhs,
Chris@16:                                              const time_rep_type& rhs)
Chris@16:     {
Chris@16:       date_duration_type dd = lhs.day - rhs.day;
Chris@16:       time_duration_type td(dd.days()*24,0,0); //days * 24 hours
Chris@16:       time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
Chris@16:       return td+td2;
Chris@16:       // return time_rep_type(base.day-dd, base.time_of_day);
Chris@16:     }
Chris@16:     
Chris@16:   };
Chris@16: 
Chris@16: } } //namespace date_time
Chris@16: 
Chris@16: 
Chris@16: #endif