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1 | #ifndef DATE_DURATION_TYPES_HPP___ |
2 | #define DATE_DURATION_TYPES_HPP___ | |
3 | ||
4 | /* Copyright (c) 2004 CrystalClear Software, Inc. | |
5 | * Subject to the Boost Software License, Version 1.0. | |
6 | * (See accompanying file LICENSE_1_0.txt or | |
7 | * http://www.boost.org/LICENSE_1_0.txt) | |
8 | * Author: Jeff Garland, Bart Garst | |
9 | * $Date$ | |
10 | */ | |
11 | ||
12 | #include <boost/date_time/int_adapter.hpp> | |
13 | #include <boost/date_time/special_defs.hpp> | |
14 | #include <boost/date_time/date_duration.hpp> | |
15 | ||
16 | namespace boost { | |
17 | namespace date_time { | |
18 | ||
19 | ||
20 | //! Additional duration type that represents a number of n*7 days | |
21 | template <class duration_config> | |
22 | class weeks_duration : public date_duration<duration_config> { | |
23 | public: | |
24 | weeks_duration(typename duration_config::impl_type w) | |
25 | : date_duration<duration_config>(w * 7) {} | |
26 | weeks_duration(special_values sv) | |
27 | : date_duration<duration_config>(sv) {} | |
28 | }; | |
29 | ||
30 | // predeclare | |
31 | template<class t> | |
32 | class years_duration; | |
33 | ||
34 | //! additional duration type that represents a logical month | |
35 | /*! A logical month enables things like: "date(2002,Mar,2) + months(2) -> | |
36 | * 2002-May2". If the date is a last day-of-the-month, the result will | |
37 | * also be a last-day-of-the-month. | |
38 | */ | |
39 | template<class base_config> | |
40 | class months_duration | |
41 | { | |
42 | private: | |
43 | typedef typename base_config::int_rep int_rep; | |
44 | typedef typename int_rep::int_type int_type; | |
45 | typedef typename base_config::date_type date_type; | |
46 | typedef typename date_type::duration_type duration_type; | |
47 | typedef typename base_config::month_adjustor_type month_adjustor_type; | |
48 | typedef months_duration<base_config> months_type; | |
49 | typedef years_duration<base_config> years_type; | |
50 | public: | |
51 | months_duration(int_rep num) : _m(num) {} | |
52 | months_duration(special_values sv) : _m(sv) | |
53 | { | |
54 | _m = int_rep::from_special(sv); | |
55 | } | |
56 | int_rep number_of_months() const { return _m; } | |
57 | //! returns a negative duration | |
58 | duration_type get_neg_offset(const date_type& d) const | |
59 | { | |
60 | month_adjustor_type m_adj(_m.as_number()); | |
61 | return duration_type(m_adj.get_neg_offset(d)); | |
62 | } | |
63 | duration_type get_offset(const date_type& d) const | |
64 | { | |
65 | month_adjustor_type m_adj(_m.as_number()); | |
66 | return duration_type(m_adj.get_offset(d)); | |
67 | } | |
68 | bool operator==(const months_type& rhs) const | |
69 | { | |
70 | return(_m == rhs._m); | |
71 | } | |
72 | bool operator!=(const months_type& rhs) const | |
73 | { | |
74 | return(_m != rhs._m); | |
75 | } | |
76 | months_type operator+(const months_type& rhs)const | |
77 | { | |
78 | return months_type(_m + rhs._m); | |
79 | } | |
80 | months_type& operator+=(const months_type& rhs) | |
81 | { | |
82 | _m = _m + rhs._m; | |
83 | return *this; | |
84 | } | |
85 | months_type operator-(const months_type& rhs)const | |
86 | { | |
87 | return months_type(_m - rhs._m); | |
88 | } | |
89 | months_type& operator-=(const months_type& rhs) | |
90 | { | |
91 | _m = _m - rhs._m; | |
92 | return *this; | |
93 | } | |
94 | months_type operator*(const int_type rhs)const | |
95 | { | |
96 | return months_type(_m * rhs); | |
97 | } | |
98 | months_type& operator*=(const int_type rhs) | |
99 | { | |
100 | _m = _m * rhs; | |
101 | return *this; | |
102 | } | |
103 | months_type operator/(const int_type rhs)const | |
104 | { | |
105 | return months_type(_m / rhs); | |
106 | } | |
107 | months_type& operator/=(const int_type rhs) | |
108 | { | |
109 | _m = _m / rhs; | |
110 | return *this; | |
111 | } | |
112 | months_type operator+(const years_type& y)const | |
113 | { | |
114 | return months_type(y.number_of_years() * 12 + _m); | |
115 | } | |
116 | months_type& operator+=(const years_type& y) | |
117 | { | |
118 | _m = y.number_of_years() * 12 + _m; | |
119 | return *this; | |
120 | } | |
121 | months_type operator-(const years_type& y) const | |
122 | { | |
123 | return months_type(_m - y.number_of_years() * 12); | |
124 | } | |
125 | months_type& operator-=(const years_type& y) | |
126 | { | |
127 | _m = _m - y.number_of_years() * 12; | |
128 | return *this; | |
129 | } | |
130 | ||
131 | // | |
132 | friend date_type operator+(const date_type& d, const months_type& m) | |
133 | { | |
134 | return d + m.get_offset(d); | |
135 | } | |
136 | friend date_type operator+=(date_type& d, const months_type& m) | |
137 | { | |
138 | return d += m.get_offset(d); | |
139 | } | |
140 | friend date_type operator-(const date_type& d, const months_type& m) | |
141 | { | |
142 | // get_neg_offset returns a negative duration, so we add | |
143 | return d + m.get_neg_offset(d); | |
144 | } | |
145 | friend date_type operator-=(date_type& d, const months_type& m) | |
146 | { | |
147 | // get_neg_offset returns a negative duration, so we add | |
148 | return d += m.get_neg_offset(d); | |
149 | } | |
150 | ||
151 | private: | |
152 | int_rep _m; | |
153 | }; | |
154 | ||
155 | //! additional duration type that represents a logical year | |
156 | /*! A logical year enables things like: "date(2002,Mar,2) + years(2) -> | |
157 | * 2004-Mar-2". If the date is a last day-of-the-month, the result will | |
158 | * also be a last-day-of-the-month (ie date(2001-Feb-28) + years(3) -> | |
159 | * 2004-Feb-29). | |
160 | */ | |
161 | template<class base_config> | |
162 | class years_duration | |
163 | { | |
164 | private: | |
165 | typedef typename base_config::int_rep int_rep; | |
166 | typedef typename int_rep::int_type int_type; | |
167 | typedef typename base_config::date_type date_type; | |
168 | typedef typename date_type::duration_type duration_type; | |
169 | typedef typename base_config::month_adjustor_type month_adjustor_type; | |
170 | typedef years_duration<base_config> years_type; | |
171 | typedef months_duration<base_config> months_type; | |
172 | public: | |
173 | years_duration(int_rep num) : _y(num) {} | |
174 | years_duration(special_values sv) : _y(sv) | |
175 | { | |
176 | _y = int_rep::from_special(sv); | |
177 | } | |
178 | int_rep number_of_years() const { return _y; } | |
179 | //! returns a negative duration | |
180 | duration_type get_neg_offset(const date_type& d) const | |
181 | { | |
182 | month_adjustor_type m_adj(_y.as_number() * 12); | |
183 | return duration_type(m_adj.get_neg_offset(d)); | |
184 | } | |
185 | duration_type get_offset(const date_type& d) const | |
186 | { | |
187 | month_adjustor_type m_adj(_y.as_number() * 12); | |
188 | return duration_type(m_adj.get_offset(d)); | |
189 | } | |
190 | bool operator==(const years_type& rhs) const | |
191 | { | |
192 | return(_y == rhs._y); | |
193 | } | |
194 | bool operator!=(const years_type& rhs) const | |
195 | { | |
196 | return(_y != rhs._y); | |
197 | } | |
198 | years_type operator+(const years_type& rhs)const | |
199 | { | |
200 | return years_type(_y + rhs._y); | |
201 | } | |
202 | years_type& operator+=(const years_type& rhs) | |
203 | { | |
204 | _y = _y + rhs._y; | |
205 | return *this; | |
206 | } | |
207 | years_type operator-(const years_type& rhs)const | |
208 | { | |
209 | return years_type(_y - rhs._y); | |
210 | } | |
211 | years_type& operator-=(const years_type& rhs) | |
212 | { | |
213 | _y = _y - rhs._y; | |
214 | return *this; | |
215 | } | |
216 | years_type operator*(const int_type rhs)const | |
217 | { | |
218 | return years_type(_y * rhs); | |
219 | } | |
220 | years_type& operator*=(const int_type rhs) | |
221 | { | |
222 | _y = _y * rhs; | |
223 | return *this; | |
224 | } | |
225 | years_type operator/(const int_type rhs)const | |
226 | { | |
227 | return years_type(_y / rhs); | |
228 | } | |
229 | years_type& operator/=(const int_type rhs) | |
230 | { | |
231 | _y = _y / rhs; | |
232 | return *this; | |
233 | } | |
234 | months_type operator+(const months_type& m) const | |
235 | { | |
236 | return(months_type(_y * 12 + m.number_of_months())); | |
237 | } | |
238 | months_type operator-(const months_type& m) const | |
239 | { | |
240 | return(months_type(_y * 12 - m.number_of_months())); | |
241 | } | |
242 | ||
243 | // | |
244 | friend date_type operator+(const date_type& d, const years_type& y) | |
245 | { | |
246 | return d + y.get_offset(d); | |
247 | } | |
248 | friend date_type operator+=(date_type& d, const years_type& y) | |
249 | { | |
250 | return d += y.get_offset(d); | |
251 | } | |
252 | friend date_type operator-(const date_type& d, const years_type& y) | |
253 | { | |
254 | // get_neg_offset returns a negative duration, so we add | |
255 | return d + y.get_neg_offset(d); | |
256 | } | |
257 | friend date_type operator-=(date_type& d, const years_type& y) | |
258 | { | |
259 | // get_neg_offset returns a negative duration, so we add | |
260 | return d += y.get_neg_offset(d); | |
261 | } | |
262 | ||
263 | private: | |
264 | int_rep _y; | |
265 | }; | |
266 | ||
267 | }} // namespace boost::date_time | |
268 | ||
269 | #endif // DATE_DURATION_TYPES_HPP___ |