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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 | ||
17 | namespace boost { | |
18 | namespace 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 |