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