Chris@16: #ifndef DATE_TIME_TIME_SYSTEM_COUNTED_HPP
Chris@16: #define DATE_TIME_TIME_SYSTEM_COUNTED_HPP
Chris@16: 
Chris@16: /* Copyright (c) 2002,2003 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: 
Chris@16: #include "boost/date_time/time_defs.hpp"
Chris@16: #include <string>
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace date_time {
Chris@16: 
Chris@16:   //! Time representation that uses a single integer count
Chris@16:   template<class config>
Chris@16:   struct counted_time_rep
Chris@16:   {
Chris@16:     typedef typename config::int_type   int_type;
Chris@16:     typedef typename config::date_type  date_type;
Chris@16:     typedef typename config::impl_type  impl_type;
Chris@16:     typedef typename date_type::duration_type date_duration_type;
Chris@16:     typedef typename date_type::calendar_type calendar_type;
Chris@16:     typedef typename date_type::ymd_type ymd_type;
Chris@16:     typedef typename config::time_duration_type time_duration_type;
Chris@16:     typedef typename config::resolution_traits   resolution_traits;
Chris@16:     
Chris@16:     counted_time_rep(const date_type& d, const time_duration_type& time_of_day) 
Chris@16:       : time_count_(1)
Chris@16:     {
Chris@16:       if(d.is_infinity() || d.is_not_a_date() || time_of_day.is_special()) {
Chris@16:         time_count_ = time_of_day.get_rep() + d.day_count();
Chris@16:         //std::cout << time_count_ << std::endl;
Chris@16:       }
Chris@16:       else {    
Chris@16:         time_count_ = (d.day_number() * frac_sec_per_day()) + time_of_day.ticks();
Chris@16:       }
Chris@16:     }
Chris@16:     explicit counted_time_rep(int_type count) :
Chris@16:       time_count_(count)
Chris@16:     {}
Chris@16:     explicit counted_time_rep(impl_type count) :
Chris@16:       time_count_(count)
Chris@16:     {}
Chris@16:     date_type date() const
Chris@16:     {
Chris@16:       if(time_count_.is_special()) {
Chris@16:         return date_type(time_count_.as_special());
Chris@16:       }
Chris@16:       else {
Chris@16:         typename calendar_type::date_int_type dc = day_count();
Chris@16:         //std::cout << "time_rep here:" << dc << std::endl;
Chris@16:         ymd_type ymd = calendar_type::from_day_number(dc);
Chris@16:         return date_type(ymd);
Chris@16:       }
Chris@16:     }
Chris@16:     //int_type day_count() const
Chris@16:     unsigned long day_count() const
Chris@16:     {
Chris@16:       /* resolution_traits::as_number returns a boost::int64_t & 
Chris@16:        * frac_sec_per_day is also a boost::int64_t so, naturally, 
Chris@16:        * the division operation returns a boost::int64_t. 
Chris@16:        * The static_cast to an unsigned long is ok (results in no data loss) 
Chris@16:        * because frac_sec_per_day is either the number of 
Chris@16:        * microseconds per day, or the number of nanoseconds per day. 
Chris@16:        * Worst case scenario: resolution_traits::as_number returns the 
Chris@16:        * maximum value an int64_t can hold and frac_sec_per_day 
Chris@16:        * is microseconds per day (lowest possible value). 
Chris@16:        * The division operation will then return a value of 106751991 - 
Chris@16:        * easily fitting in an unsigned long. 
Chris@16:        */
Chris@16:       return static_cast<unsigned long>(resolution_traits::as_number(time_count_) / frac_sec_per_day());
Chris@16:     }
Chris@16:     int_type time_count() const
Chris@16:     {
Chris@16:       return resolution_traits::as_number(time_count_);
Chris@16:     }
Chris@16:     int_type tod() const
Chris@16:     {
Chris@16:       return resolution_traits::as_number(time_count_) % frac_sec_per_day();
Chris@16:     }
Chris@16:     static int_type frac_sec_per_day()
Chris@16:     {
Chris@16:       int_type seconds_per_day = 60*60*24;
Chris@16:       int_type fractional_sec_per_sec(resolution_traits::res_adjust());
Chris@16:       return seconds_per_day*fractional_sec_per_sec;
Chris@16:     }
Chris@16:     bool is_pos_infinity()const
Chris@16:     {
Chris@16:       return impl_type::is_pos_inf(time_count_.as_number());
Chris@16:     }
Chris@16:     bool is_neg_infinity()const
Chris@16:     {
Chris@16:       return impl_type::is_neg_inf(time_count_.as_number());
Chris@16:     }
Chris@16:     bool is_not_a_date_time()const
Chris@16:     {
Chris@16:       return impl_type::is_not_a_number(time_count_.as_number());
Chris@16:     }
Chris@16:     bool is_special()const
Chris@16:     {
Chris@16:       return time_count_.is_special();
Chris@16:     }
Chris@16:     impl_type get_rep()const
Chris@16:     {
Chris@16:       return time_count_;
Chris@16:     }
Chris@16:   private:
Chris@16:     impl_type time_count_;
Chris@16:   };
Chris@16: 
Chris@16:   //! An unadjusted time system implementation.
Chris@16:   template<class time_rep>
Chris@16:   class counted_time_system
Chris@16:   {
Chris@16:    public:
Chris@16:     typedef time_rep time_rep_type;
Chris@16:     typedef typename time_rep_type::impl_type impl_type;
Chris@16:     typedef typename time_rep_type::time_duration_type time_duration_type;
Chris@16:     typedef typename time_duration_type::fractional_seconds_type fractional_seconds_type;
Chris@16:     typedef typename time_rep_type::date_type date_type;
Chris@16:     typedef typename time_rep_type::date_duration_type date_duration_type;
Chris@16: 
Chris@16: 
Chris@16:     template<class T> static void unused_var(const T&) {}
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:       unused_var(dst);
Chris@16:       return time_rep_type(day, tod);
Chris@16:     }
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 date_type get_date(const time_rep_type& val)
Chris@16:     {
Chris@16:       return val.date();
Chris@16:     }
Chris@16:     static time_duration_type get_time_of_day(const time_rep_type& val)
Chris@16:     {
Chris@16:       if(val.is_special()) {
Chris@16:         return time_duration_type(val.get_rep().as_special());
Chris@16:       }
Chris@16:       else{
Chris@16:         return time_duration_type(0,0,0,val.tod()); 
Chris@16:       }
Chris@16:     }
Chris@16:     static std::string zone_name(const time_rep_type&)
Chris@16:     {
Chris@16:       return "";
Chris@16:     }
Chris@16:     static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
Chris@16:     {
Chris@16:       return (lhs.time_count() == rhs.time_count());
Chris@16:     }
Chris@16:     static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
Chris@16:     {
Chris@16:       return (lhs.time_count() < rhs.time_count());
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:       if(base.is_special() || dd.is_special()) {
Chris@16:         return(time_rep_type(base.get_rep() + dd.get_rep()));
Chris@16:       }
Chris@16:       else {
Chris@16:         return time_rep_type(base.time_count() + (dd.days() * time_rep_type::frac_sec_per_day()));
Chris@16:       }
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:       if(base.is_special() || dd.is_special()) {
Chris@16:         return(time_rep_type(base.get_rep() - dd.get_rep()));
Chris@16:       }
Chris@16:       else{
Chris@16:         return time_rep_type(base.time_count() - (dd.days() * time_rep_type::frac_sec_per_day()));
Chris@16:       }
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.is_special() || td.is_special()) {
Chris@16:         return(time_rep_type(base.get_rep() - td.get_rep()));
Chris@16:       }
Chris@16:       else {
Chris@16:         return time_rep_type(base.time_count() - td.ticks());
Chris@16:       }
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.is_special() || td.is_special()) {
Chris@16:         return(time_rep_type(base.get_rep() + td.get_rep()));
Chris@16:       }
Chris@16:       else {
Chris@16:         return time_rep_type(base.time_count() + td.ticks());
Chris@16:       }
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:       if(lhs.is_special() || rhs.is_special()) {
Chris@16:         return(time_duration_type(
Chris@16:           impl_type::to_special((lhs.get_rep() - rhs.get_rep()).as_number())));
Chris@16:       }
Chris@16:       else {
Chris@16:         fractional_seconds_type fs = lhs.time_count() - rhs.time_count();
Chris@16:         return time_duration_type(0,0,0,fs); 
Chris@16:       }
Chris@16:     }
Chris@16:     
Chris@16:   };
Chris@16: 
Chris@16: 
Chris@16: } } //namespace date_time
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #endif
Chris@16: