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