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