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