1#ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP
2#define DATE_TIME_TIME_SYSTEM_SPLIT_HPP
3
4/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
5 * Use, modification and distribution is subject to the
6 * Boost Software License, Version 1.0. (See accompanying
7 * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
8 * Author: Jeff Garland, Bart Garst
9 * $Date$
10 */
11
12
13#include <string>
14#include <boost/cstdint.hpp>
15#include <boost/date_time/compiler_config.hpp>
16#include <boost/date_time/time_defs.hpp>
17#include <boost/date_time/special_defs.hpp>
18#include <boost/date_time/wrapping_int.hpp>
19
20namespace boost {
21namespace date_time {
22
23 //! An unadjusted time system implementation.
24#if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
25 template<typename config, boost::int32_t ticks_per_second>
26#else
27 template<typename config>
28#endif
29 class split_timedate_system
30 {
31 public:
32 typedef typename config::time_rep_type time_rep_type;
33 typedef typename config::date_type date_type;
34 typedef typename config::time_duration_type time_duration_type;
35 typedef typename config::date_duration_type date_duration_type;
36 typedef typename config::int_type int_type;
37 typedef typename config::resolution_traits resolution_traits;
38
39 //86400 is number of seconds in a day...
40#if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))
41 typedef date_time::wrapping_int<int_type, INT64_C(86400) * ticks_per_second > wrap_int_type;
42#else
43 private:
44 BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second);
45 public:
46# if BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT(0X581) )
47 typedef date_time::wrapping_int< split_timedate_system::int_type, split_timedate_system::ticks_per_day> wrap_int_type;
48# else
49 typedef date_time::wrapping_int<int_type, ticks_per_day> wrap_int_type;
50#endif
51#endif
52
53 static
54 BOOST_CXX14_CONSTEXPR
55 time_rep_type get_time_rep(special_values sv)
56 {
57 switch (sv) {
58 case not_a_date_time:
59 return time_rep_type(date_type(not_a_date_time),
60 time_duration_type(not_a_date_time));
61 case pos_infin:
62 return time_rep_type(date_type(pos_infin),
63 time_duration_type(pos_infin));
64 case neg_infin:
65 return time_rep_type(date_type(neg_infin),
66 time_duration_type(neg_infin));
67 case max_date_time: {
68 time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
69 return time_rep_type(date_type(max_date_time), td);
70 }
71 case min_date_time:
72 return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
73
74 default:
75 return time_rep_type(date_type(not_a_date_time),
76 time_duration_type(not_a_date_time));
77
78 }
79
80 }
81
82 static
83 BOOST_CXX14_CONSTEXPR
84 time_rep_type get_time_rep(const date_type& day,
85 const time_duration_type& tod,
86 date_time::dst_flags /* dst */ = not_dst)
87 {
88 if(day.is_special() || tod.is_special()) {
89 if(day.is_not_a_date() || tod.is_not_a_date_time()) {
90 return time_rep_type(date_type(not_a_date_time),
91 time_duration_type(not_a_date_time));
92 }
93 else if(day.is_pos_infinity()) {
94 if(tod.is_neg_infinity()) {
95 return time_rep_type(date_type(not_a_date_time),
96 time_duration_type(not_a_date_time));
97 }
98 else {
99 return time_rep_type(day, time_duration_type(pos_infin));
100 }
101 }
102 else if(day.is_neg_infinity()) {
103 if(tod.is_pos_infinity()) {
104 return time_rep_type(date_type(not_a_date_time),
105 time_duration_type(not_a_date_time));
106 }
107 else {
108 return time_rep_type(day, time_duration_type(neg_infin));
109 }
110 }
111 else if(tod.is_pos_infinity()) {
112 if(day.is_neg_infinity()) {
113 return time_rep_type(date_type(not_a_date_time),
114 time_duration_type(not_a_date_time));
115 }
116 else {
117 return time_rep_type(date_type(pos_infin), tod);
118 }
119 }
120 else if(tod.is_neg_infinity()) {
121 if(day.is_pos_infinity()) {
122 return time_rep_type(date_type(not_a_date_time),
123 time_duration_type(not_a_date_time));
124 }
125 else {
126 return time_rep_type(date_type(neg_infin), tod);
127 }
128 }
129 }
130 return time_rep_type(day, tod);
131 }
132 static BOOST_CONSTEXPR date_type get_date(const time_rep_type& val)
133 {
134 return date_type(val.day);
135 }
136 static BOOST_CONSTEXPR time_duration_type get_time_of_day(const time_rep_type& val)
137 {
138 return time_duration_type(val.time_of_day);
139 }
140 static std::string zone_name(const time_rep_type&)
141 {
142 return std::string();
143 }
144 static BOOST_CONSTEXPR
145 bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
146 {
147 return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day));
148 }
149 static BOOST_CXX14_CONSTEXPR
150 bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
151 {
152 if (lhs.day < rhs.day) return true;
153 if (lhs.day > rhs.day) return false;
154 return (lhs.time_of_day < rhs.time_of_day);
155 }
156 static BOOST_CXX14_CONSTEXPR
157 time_rep_type add_days(const time_rep_type& base,
158 const date_duration_type& dd)
159 {
160 return time_rep_type(base.day+dd, base.time_of_day);
161 }
162 static BOOST_CXX14_CONSTEXPR
163 time_rep_type subtract_days(const time_rep_type& base,
164 const date_duration_type& dd)
165 {
166 return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day);
167 }
168 static BOOST_CXX14_CONSTEXPR
169 time_rep_type subtract_time_duration(const time_rep_type& base,
170 const time_duration_type& td)
171 {
172 if(base.day.is_special() || td.is_special())
173 {
174 return split_timedate_system::get_time_rep(base.day, -td);
175 }
176 if (td.is_negative()) {
177 time_duration_type td1 = td.invert_sign();
178 return add_time_duration(base,td: td1);
179 }
180
181 wrap_int_type day_offset(base.time_of_day.ticks());
182 date_duration_type day_overflow(static_cast<typename date_duration_type::duration_rep_type>(day_offset.subtract(td.ticks())));
183
184 return time_rep_type(base.day-day_overflow,
185 time_duration_type(0,0,0,day_offset.as_int()));
186 }
187 static BOOST_CXX14_CONSTEXPR
188 time_rep_type add_time_duration(const time_rep_type& base,
189 time_duration_type td)
190 {
191 if(base.day.is_special() || td.is_special()) {
192 return split_timedate_system::get_time_rep(base.day, td);
193 }
194 if (td.is_negative()) {
195 time_duration_type td1 = td.invert_sign();
196 return subtract_time_duration(base,td: td1);
197 }
198
199 wrap_int_type day_offset(base.time_of_day.ticks());
200 date_duration_type day_overflow(static_cast< typename date_duration_type::duration_rep_type >(day_offset.add(td.ticks())));
201
202 return time_rep_type(base.day+day_overflow,
203 time_duration_type(0,0,0,day_offset.as_int()));
204 }
205 static BOOST_CXX14_CONSTEXPR
206 time_duration_type subtract_times(const time_rep_type& lhs,
207 const time_rep_type& rhs)
208 {
209 date_duration_type dd = lhs.day - rhs.day;
210 if (BOOST_LIKELY(!dd.is_special())) {
211 time_duration_type td(dd.days()*24,0,0); // days * 24 hours
212 time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
213 return td+td2;
214 } else {
215 time_duration_type td(dd.as_special());
216 time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
217 return td+td2;
218 }
219 }
220
221 };
222
223} } //namespace date_time
224
225
226#endif
227

source code of include/boost/date_time/time_system_split.hpp