[857] | 1 | #ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP
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| 2 | #define DATE_TIME_TIME_SYSTEM_SPLIT_HPP
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| 3 |
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| 4 | /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
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| 5 | * Use, modification and distribution is subject to the
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| 6 | * Boost Software License, Version 1.0. (See accompanying
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| 7 | * file LICENSE-1.0 or http://www.boost.org/LICENSE-1.0)
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| 8 | * Author: Jeff Garland, Bart Garst
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| 9 | * $Date: 2005/05/25 14:15:40 $
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| 10 | */
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| 11 |
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| 12 |
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| 13 | #include <string>
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| 14 | #include "boost/date_time/compiler_config.hpp"
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| 15 | #include "boost/date_time/special_defs.hpp"
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| 16 |
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| 17 | namespace boost {
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| 18 | namespace date_time {
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| 19 |
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| 20 | //! An unadjusted time system implementation.
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| 21 | #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
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| 22 | template<typename config, boost::int32_t ticks_per_second>
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| 23 | #else
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| 24 | template<typename config>
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| 25 | #endif
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| 26 | class split_timedate_system
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| 27 | {
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| 28 | public:
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| 29 | typedef typename config::time_rep_type time_rep_type;
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| 30 | typedef typename config::date_type date_type;
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| 31 | typedef typename config::time_duration_type time_duration_type;
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| 32 | typedef typename config::date_duration_type date_duration_type;
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| 33 | typedef typename config::int_type int_type;
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| 34 | typedef typename config::resolution_traits resolution_traits;
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| 35 |
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| 36 | //86400 is number of seconds in a day...
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| 37 | #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
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| 38 | typedef date_time::wrapping_int<int_type, INT64_C(86400) * ticks_per_second > wrap_int_type;
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| 39 | #else
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| 40 | private:
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| 41 | BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second);
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| 42 | public:
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| 43 | typedef date_time::wrapping_int<int_type, ticks_per_day> wrap_int_type;
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| 44 | #endif
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| 45 |
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| 46 | static time_rep_type get_time_rep(special_values sv)
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| 47 | {
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| 48 | switch (sv) {
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| 49 | case not_a_date_time:
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| 50 | return time_rep_type(date_type(not_a_date_time),
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| 51 | time_duration_type(not_a_date_time));
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| 52 | case pos_infin:
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| 53 | return time_rep_type(date_type(pos_infin),
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| 54 | time_duration_type(pos_infin));
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| 55 | case neg_infin:
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| 56 | return time_rep_type(date_type(neg_infin),
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| 57 | time_duration_type(neg_infin));
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| 58 | case max_date_time: {
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| 59 | time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
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| 60 | return time_rep_type(date_type(max_date_time), td);
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| 61 | }
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| 62 | case min_date_time:
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| 63 | return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
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| 64 |
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| 65 | default:
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| 66 | return time_rep_type(date_type(not_a_date_time),
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| 67 | time_duration_type(not_a_date_time));
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| 68 |
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| 69 | }
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| 70 |
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| 71 | }
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| 72 |
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| 73 | static time_rep_type get_time_rep(const date_type& day,
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| 74 | const time_duration_type& tod,
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| 75 | date_time::dst_flags dst=not_dst)
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| 76 | {
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| 77 | if(day.is_special() || tod.is_special()) {
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| 78 | if(day.is_not_a_date() || tod.is_not_a_date_time()) {
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| 79 | return time_rep_type(date_type(not_a_date_time),
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| 80 | time_duration_type(not_a_date_time));
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| 81 | }
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| 82 | else if(day.is_pos_infinity()) {
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| 83 | if(tod.is_neg_infinity()) {
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| 84 | return time_rep_type(date_type(not_a_date_time),
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| 85 | time_duration_type(not_a_date_time));
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| 86 | }
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| 87 | else {
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| 88 | return time_rep_type(day, time_duration_type(pos_infin));
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| 89 | }
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| 90 | }
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| 91 | else if(day.is_neg_infinity()) {
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| 92 | if(tod.is_pos_infinity()) {
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| 93 | return time_rep_type(date_type(not_a_date_time),
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| 94 | time_duration_type(not_a_date_time));
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| 95 | }
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| 96 | else {
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| 97 | return time_rep_type(day, time_duration_type(neg_infin));
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| 98 | }
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| 99 | }
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| 100 | else if(tod.is_pos_infinity()) {
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| 101 | if(day.is_neg_infinity()) {
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| 102 | return time_rep_type(date_type(not_a_date_time),
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| 103 | time_duration_type(not_a_date_time));
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| 104 | }
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| 105 | else {
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| 106 | return time_rep_type(date_type(pos_infin), tod);
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| 107 | }
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| 108 | }
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| 109 | else if(tod.is_neg_infinity()) {
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| 110 | if(day.is_pos_infinity()) {
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| 111 | return time_rep_type(date_type(not_a_date_time),
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| 112 | time_duration_type(not_a_date_time));
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| 113 | }
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| 114 | else {
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| 115 | return time_rep_type(date_type(neg_infin), tod);
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| 116 | }
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| 117 | }
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| 118 | }
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| 119 | return time_rep_type(day, tod);
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| 120 | }
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| 121 | static date_type get_date(const time_rep_type& val)
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| 122 | {
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| 123 | return date_type(val.day);
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| 124 | }
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| 125 | static time_duration_type get_time_of_day(const time_rep_type& val)
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| 126 | {
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| 127 | return time_duration_type(val.time_of_day);
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| 128 | }
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| 129 | static std::string zone_name(const time_rep_type&)
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| 130 | {
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| 131 | return "";
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| 132 | }
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| 133 | static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
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| 134 | {
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| 135 | return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day));
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| 136 | }
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| 137 | static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
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| 138 | {
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| 139 | if (lhs.day < rhs.day) return true;
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| 140 | if (lhs.day > rhs.day) return false;
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| 141 | return (lhs.time_of_day < rhs.time_of_day);
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| 142 | }
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| 143 | static time_rep_type add_days(const time_rep_type& base,
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| 144 | const date_duration_type& dd)
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| 145 | {
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| 146 | return time_rep_type(base.day+dd, base.time_of_day);
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| 147 | }
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| 148 | static time_rep_type subtract_days(const time_rep_type& base,
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| 149 | const date_duration_type& dd)
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| 150 | {
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| 151 | return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day);
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| 152 | }
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| 153 | static time_rep_type subtract_time_duration(const time_rep_type& base,
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| 154 | const time_duration_type& td)
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| 155 | {
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| 156 | if(base.day.is_special() || td.is_special())
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| 157 | {
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| 158 | return split_timedate_system::get_time_rep(base.day, -td);
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| 159 | }
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| 160 | if (td.is_negative()) {
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| 161 | time_duration_type td1 = td.invert_sign();
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| 162 | return add_time_duration(base,td1);
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| 163 | }
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| 164 |
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| 165 | //std::cout << td.ticks() << std::endl;
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| 166 | wrap_int_type day_offset(base.time_of_day.ticks());
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| 167 | date_duration_type day_overflow(static_cast<typename date_duration_type::duration_rep_type>(day_offset.subtract(td.ticks())));
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| 168 | // std::cout << "sub: " << base.time_of_day.ticks() << "|"
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| 169 | // << day_offset.as_int() << "|"
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| 170 | // << day_overflow.days() << std::endl;
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| 171 | return time_rep_type(base.day-day_overflow,
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| 172 | time_duration_type(0,0,0,day_offset.as_int()));
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| 173 | }
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| 174 | static time_rep_type add_time_duration(const time_rep_type& base,
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| 175 | time_duration_type td)
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| 176 | {
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| 177 | if(base.day.is_special() || td.is_special()) {
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| 178 | return split_timedate_system::get_time_rep(base.day, td);
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| 179 | }
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| 180 | if (td.is_negative()) {
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| 181 | time_duration_type td1 = td.invert_sign();
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| 182 | return subtract_time_duration(base,td1);
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| 183 | }
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| 184 | wrap_int_type day_offset(base.time_of_day.ticks());
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| 185 | typename date_duration_type::duration_rep_type doff = day_offset.add(td.ticks());
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| 186 | // std::cout << "day overflow: " << doff << std::endl;
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| 187 | // std::cout << "ticks: " << td.ticks() << std::endl;
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| 188 | date_duration_type day_overflow(doff);
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| 189 | // std::cout << "base: " << to_simple_string(base.day) << std::endl;
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| 190 | // std::cout << "overflow " << day_overflow.days() << std::endl;
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| 191 | return time_rep_type(base.day+day_overflow,
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| 192 | time_duration_type(0,0,0,day_offset.as_int()));
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| 193 | }
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| 194 | static time_duration_type subtract_times(const time_rep_type& lhs,
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| 195 | const time_rep_type& rhs)
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| 196 | {
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| 197 | date_duration_type dd = lhs.day - rhs.day;
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| 198 | time_duration_type td(dd.days()*24,0,0); //days * 24 hours
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| 199 | time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
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| 200 | return td+td2;
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| 201 | // return time_rep_type(base.day-dd, base.time_of_day);
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| 202 | }
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| 203 |
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| 204 | };
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| 205 |
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| 206 | } } //namespace date_time
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| 207 |
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| 208 |
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| 209 | #endif
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