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,td: 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,td: 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 | |