#ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP #define DATE_TIME_TIME_SYSTEM_SPLIT_HPP /* Copyright (c) 2002,2003,2005 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: 2008-11-13 15:10:23 -0500 (Thu, 13 Nov 2008) $ */ #include <string> #include "boost/date_time/compiler_config.hpp" #include "boost/date_time/special_defs.hpp" namespace boost { namespace date_time { //! An unadjusted time system implementation. #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT)) template<typename config, boost::int32_t ticks_per_second> #else template<typename config> #endif class split_timedate_system { public: typedef typename config::time_rep_type time_rep_type; typedef typename config::date_type date_type; typedef typename config::time_duration_type time_duration_type; typedef typename config::date_duration_type date_duration_type; typedef typename config::int_type int_type; typedef typename config::resolution_traits resolution_traits; //86400 is number of seconds in a day... #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT)) typedef date_time::wrapping_int<int_type, INT64_C(86400) * ticks_per_second > wrap_int_type; #else private: BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second); public: # if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0X581) ) typedef date_time::wrapping_int< split_timedate_system::int_type, split_timedate_system::ticks_per_day> wrap_int_type; # else typedef date_time::wrapping_int<int_type, ticks_per_day> wrap_int_type; #endif #endif 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 time_rep_type get_time_rep(const date_type& day, const time_duration_type& tod, date_time::dst_flags /* dst */ = not_dst) { if(day.is_special() || tod.is_special()) { if(day.is_not_a_date() || tod.is_not_a_date_time()) { return time_rep_type(date_type(not_a_date_time), time_duration_type(not_a_date_time)); } else if(day.is_pos_infinity()) { if(tod.is_neg_infinity()) { return time_rep_type(date_type(not_a_date_time), time_duration_type(not_a_date_time)); } else { return time_rep_type(day, time_duration_type(pos_infin)); } } else if(day.is_neg_infinity()) { if(tod.is_pos_infinity()) { return time_rep_type(date_type(not_a_date_time), time_duration_type(not_a_date_time)); } else { return time_rep_type(day, time_duration_type(neg_infin)); } } else if(tod.is_pos_infinity()) { if(day.is_neg_infinity()) { return time_rep_type(date_type(not_a_date_time), time_duration_type(not_a_date_time)); } else { return time_rep_type(date_type(pos_infin), tod); } } else if(tod.is_neg_infinity()) { if(day.is_pos_infinity()) { return time_rep_type(date_type(not_a_date_time), time_duration_type(not_a_date_time)); } else { return time_rep_type(date_type(neg_infin), tod); } } } return time_rep_type(day, tod); } static date_type get_date(const time_rep_type& val) { return date_type(val.day); } static time_duration_type get_time_of_day(const time_rep_type& val) { return time_duration_type(val.time_of_day); } static std::string zone_name(const time_rep_type&) { return std::string(); } static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs) { return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day)); } static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs) { if (lhs.day < rhs.day) return true; if (lhs.day > rhs.day) return false; return (lhs.time_of_day < rhs.time_of_day); } static time_rep_type add_days(const time_rep_type& base, const date_duration_type& dd) { return time_rep_type(base.day+dd, base.time_of_day); } static time_rep_type subtract_days(const time_rep_type& base, const date_duration_type& dd) { return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day); } static time_rep_type subtract_time_duration(const time_rep_type& base, const time_duration_type& td) { if(base.day.is_special() || td.is_special()) { return split_timedate_system::get_time_rep(base.day, -td); } if (td.is_negative()) { time_duration_type td1 = td.invert_sign(); return add_time_duration(base,td1); } wrap_int_type day_offset(base.time_of_day.ticks()); date_duration_type day_overflow(static_cast<typename date_duration_type::duration_rep_type>(day_offset.subtract(td.ticks()))); return time_rep_type(base.day-day_overflow, time_duration_type(0,0,0,day_offset.as_int())); } static time_rep_type add_time_duration(const time_rep_type& base, time_duration_type td) { if(base.day.is_special() || td.is_special()) { return split_timedate_system::get_time_rep(base.day, td); } if (td.is_negative()) { time_duration_type td1 = td.invert_sign(); return subtract_time_duration(base,td1); } wrap_int_type day_offset(base.time_of_day.ticks()); date_duration_type day_overflow(static_cast< typename date_duration_type::duration_rep_type >(day_offset.add(td.ticks()))); return time_rep_type(base.day+day_overflow, time_duration_type(0,0,0,day_offset.as_int())); } static time_duration_type subtract_times(const time_rep_type& lhs, const time_rep_type& rhs) { date_duration_type dd = lhs.day - rhs.day; time_duration_type td(dd.days()*24,0,0); //days * 24 hours time_duration_type td2 = lhs.time_of_day - rhs.time_of_day; return td+td2; // return time_rep_type(base.day-dd, base.time_of_day); } }; } } //namespace date_time #endif