1 | #ifndef GREG_DATE_HPP___ |
2 | #define GREG_DATE_HPP___ |
3 | |
4 | /* Copyright (c) 2002,2003, 2020 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 |
9 | * $Date$ |
10 | */ |
11 | |
12 | #include <boost/throw_exception.hpp> |
13 | #include <boost/date_time/compiler_config.hpp> |
14 | #include <boost/date_time/date.hpp> |
15 | #include <boost/date_time/special_defs.hpp> |
16 | #include <boost/date_time/gregorian/greg_calendar.hpp> |
17 | #include <boost/date_time/gregorian/greg_duration.hpp> |
18 | |
19 | namespace boost { |
20 | namespace gregorian { |
21 | |
22 | //bring special enum values into the namespace |
23 | using date_time::special_values; |
24 | using date_time::not_special; |
25 | using date_time::neg_infin; |
26 | using date_time::pos_infin; |
27 | using date_time::not_a_date_time; |
28 | using date_time::max_date_time; |
29 | using date_time::min_date_time; |
30 | |
31 | //! A date type based on gregorian_calendar |
32 | /*! This class is the primary interface for programming with |
33 | greogorian dates. The is a lightweight type that can be |
34 | freely passed by value. All comparison operators are |
35 | supported. |
36 | \ingroup date_basics |
37 | */ |
38 | class BOOST_SYMBOL_VISIBLE date : public date_time::date<date, gregorian_calendar, date_duration> |
39 | { |
40 | public: |
41 | typedef gregorian_calendar::year_type year_type; |
42 | typedef gregorian_calendar::month_type month_type; |
43 | typedef gregorian_calendar::day_type day_type; |
44 | typedef gregorian_calendar::day_of_year_type day_of_year_type; |
45 | typedef gregorian_calendar::ymd_type ymd_type; |
46 | typedef gregorian_calendar::date_rep_type date_rep_type; |
47 | typedef gregorian_calendar::date_int_type date_int_type; |
48 | typedef date_duration duration_type; |
49 | #if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR) |
50 | //! Default constructor constructs with not_a_date_time |
51 | BOOST_CXX14_CONSTEXPR date(): |
52 | date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv: not_a_date_time)) |
53 | {} |
54 | #endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR |
55 | //! Main constructor with year, month, day |
56 | BOOST_CXX14_CONSTEXPR date(year_type y, month_type m, day_type d) |
57 | : date_time::date<date, gregorian_calendar, date_duration>(y, m, d) |
58 | { |
59 | if (gregorian_calendar::end_of_month_day(year: y, month: m) < d) { |
60 | boost::throw_exception(e: bad_day_of_month(std::string("Day of month is not valid for year" ))); |
61 | } |
62 | } |
63 | //! Constructor from a ymd_type structure |
64 | BOOST_CXX14_CONSTEXPR explicit date(const ymd_type& ymd) |
65 | : date_time::date<date, gregorian_calendar, date_duration>(ymd) |
66 | {} |
67 | //! Needed copy constructor |
68 | BOOST_CXX14_CONSTEXPR explicit date(const date_int_type& rhs): |
69 | date_time::date<date,gregorian_calendar, date_duration>(rhs) |
70 | {} |
71 | //! Needed copy constructor |
72 | BOOST_CXX14_CONSTEXPR explicit date(date_rep_type rhs): |
73 | date_time::date<date,gregorian_calendar, date_duration>(rhs) |
74 | {} |
75 | //! Constructor for infinities, not a date, max and min date |
76 | BOOST_CXX14_CONSTEXPR explicit date(special_values sv): |
77 | date_time::date<date, gregorian_calendar, date_duration>(from_special_adjusted(sv)) |
78 | {} |
79 | //!Return the Julian Day number for the date. |
80 | BOOST_CXX14_CONSTEXPR date_int_type julian_day() const |
81 | { |
82 | ymd_type ymd = year_month_day(); |
83 | return gregorian_calendar::julian_day_number(ymd); |
84 | } |
85 | //!Return the day of year 1..365 or 1..366 (for leap year) |
86 | BOOST_CXX14_CONSTEXPR day_of_year_type day_of_year() const |
87 | { |
88 | date start_of_year(year(), 1, 1); |
89 | unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1); |
90 | return day_of_year_type(doy); |
91 | } |
92 | //!Return the Modified Julian Day number for the date. |
93 | BOOST_CXX14_CONSTEXPR date_int_type modjulian_day() const |
94 | { |
95 | ymd_type ymd = year_month_day(); |
96 | return gregorian_calendar::modjulian_day_number(ymd); |
97 | } |
98 | //!Return the ISO 8601 week number 1..53 |
99 | BOOST_CXX14_CONSTEXPR int week_number() const |
100 | { |
101 | ymd_type ymd = year_month_day(); |
102 | return gregorian_calendar::week_number(ymd); |
103 | } |
104 | //! Return the day number from the calendar |
105 | BOOST_CXX14_CONSTEXPR date_int_type day_number() const |
106 | { |
107 | return days_; |
108 | } |
109 | //! Return the last day of the current month |
110 | BOOST_CXX14_CONSTEXPR date end_of_month() const |
111 | { |
112 | ymd_type ymd = year_month_day(); |
113 | unsigned short eom_day = gregorian_calendar::end_of_month_day(year: ymd.year, month: ymd.month); |
114 | return date(ymd.year, ymd.month, eom_day); |
115 | } |
116 | |
117 | friend BOOST_CXX14_CONSTEXPR |
118 | bool operator==(const date& lhs, const date& rhs); |
119 | |
120 | private: |
121 | |
122 | BOOST_CXX14_CONSTEXPR date_rep_type from_special_adjusted(special_values sv) |
123 | { |
124 | switch (sv) |
125 | { |
126 | case min_date_time: return gregorian_calendar::day_number(ymd: ymd_type(1400, 1, 1)); |
127 | case max_date_time: return gregorian_calendar::day_number(ymd: ymd_type(9999, 12, 31)); |
128 | default: return date_rep_type::from_special(sv); |
129 | } |
130 | } |
131 | }; |
132 | |
133 | inline BOOST_CXX14_CONSTEXPR |
134 | bool operator==(const date& lhs, const date& rhs) |
135 | { |
136 | return lhs.days_ == rhs.days_; |
137 | } |
138 | |
139 | |
140 | } } //namespace gregorian |
141 | |
142 | |
143 | |
144 | #endif |
145 | |