]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc. |
2 | * Use, modification and distribution is subject to the | |
3 | * Boost Software License, Version 1.0. (See accompanying | |
4 | * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) | |
5 | * Author: Jeff Garland, Bart Garst | |
6 | */ | |
7 | #ifndef DATE_TIME_DATE_DST_TRANSITION_DAY_GEN_HPP__ | |
8 | #define DATE_TIME_DATE_DST_TRANSITION_DAY_GEN_HPP__ | |
9 | ||
10 | ||
11 | ||
12 | namespace boost { | |
13 | namespace date_time { | |
14 | ||
15 | //! Defines base interface for calculating start and end date of daylight savings | |
16 | template<class date_type> | |
17 | class dst_day_calc_rule | |
18 | { | |
19 | public: | |
20 | typedef typename date_type::year_type year_type; | |
21 | virtual ~dst_day_calc_rule() {} | |
22 | virtual date_type start_day(year_type y) const=0; | |
23 | virtual std::string start_rule_as_string() const=0; | |
24 | virtual date_type end_day(year_type y) const=0; | |
25 | virtual std::string end_rule_as_string() const=0; | |
26 | ||
27 | }; | |
28 | ||
29 | //! Canonical form for a class that provides day rule calculation | |
30 | /*! This class is used to generate specific sets of dst rules | |
31 | * | |
32 | *@param spec Provides a specifiction of the function object types used | |
33 | * to generate start and end days of daylight savings as well | |
34 | * as the date type. | |
35 | */ | |
36 | template<class spec> | |
37 | class day_calc_dst_rule : public dst_day_calc_rule<typename spec::date_type> | |
38 | { | |
39 | public: | |
40 | typedef typename spec::date_type date_type; | |
41 | typedef typename date_type::year_type year_type; | |
42 | typedef typename spec::start_rule start_rule; | |
43 | typedef typename spec::end_rule end_rule; | |
44 | day_calc_dst_rule(start_rule dst_start, | |
45 | end_rule dst_end) : | |
46 | dst_start_(dst_start), | |
47 | dst_end_(dst_end) | |
48 | {} | |
49 | virtual date_type start_day(year_type y) const | |
50 | { | |
51 | return dst_start_.get_date(y); | |
52 | } | |
53 | virtual std::string start_rule_as_string() const | |
54 | { | |
55 | return dst_start_.to_string(); | |
56 | } | |
57 | virtual date_type end_day(year_type y) const | |
58 | { | |
59 | return dst_end_.get_date(y); | |
60 | } | |
61 | virtual std::string end_rule_as_string() const | |
62 | { | |
63 | return dst_end_.to_string(); | |
64 | } | |
65 | private: | |
66 | start_rule dst_start_; | |
67 | end_rule dst_end_; | |
68 | }; | |
69 | ||
70 | ||
71 | } }//namespace | |
72 | ||
73 | ||
74 | ||
75 | #endif |