1 | #ifndef GREG_DURATION_HPP___ |
2 | #define GREG_DURATION_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, Bart Garst |
9 | * $Date$ |
10 | */ |
11 | |
12 | #include <boost/date_time/date_duration.hpp> |
13 | #include <boost/date_time/int_adapter.hpp> |
14 | #include <boost/date_time/special_defs.hpp> |
15 | |
16 | namespace boost { |
17 | namespace gregorian { |
18 | |
19 | //!An internal date representation that includes infinities, not a date |
20 | typedef boost::date_time::duration_traits_adapted date_duration_rep; |
21 | |
22 | //! Durations in days for gregorian system |
23 | /*! \ingroup date_basics |
24 | */ |
25 | class date_duration : |
26 | public boost::date_time::date_duration< date_duration_rep > |
27 | { |
28 | typedef boost::date_time::date_duration< date_duration_rep > base_type; |
29 | |
30 | public: |
31 | typedef base_type::duration_rep duration_rep; |
32 | |
33 | //! Construct from a day count |
34 | explicit date_duration(duration_rep day_count = 0) : base_type(day_count) {} |
35 | |
36 | //! construct from special_values |
37 | date_duration(date_time::special_values sv) : base_type(sv) {} |
38 | |
39 | //! Copy constructor |
40 | date_duration(const date_duration& other) : base_type(static_cast< base_type const& >(other)) |
41 | {} |
42 | |
43 | //! Construct from another date_duration |
44 | date_duration(const base_type& other) : base_type(other) |
45 | {} |
46 | |
47 | // Relational operators |
48 | // NOTE: Because of date_time::date_duration< T > design choice we don't use Boost.Operators here, |
49 | // because we need the class to be a direct base. Either lose EBO, or define operators by hand. |
50 | // The latter is more effecient. |
51 | bool operator== (const date_duration& rhs) const |
52 | { |
53 | return base_type::operator== (rhs); |
54 | } |
55 | bool operator!= (const date_duration& rhs) const |
56 | { |
57 | return !operator== (rhs); |
58 | } |
59 | bool operator< (const date_duration& rhs) const |
60 | { |
61 | return base_type::operator< (rhs); |
62 | } |
63 | bool operator> (const date_duration& rhs) const |
64 | { |
65 | return !(base_type::operator< (rhs) || base_type::operator== (rhs)); |
66 | } |
67 | bool operator<= (const date_duration& rhs) const |
68 | { |
69 | return (base_type::operator< (rhs) || base_type::operator== (rhs)); |
70 | } |
71 | bool operator>= (const date_duration& rhs) const |
72 | { |
73 | return !base_type::operator< (rhs); |
74 | } |
75 | |
76 | //! Subtract another duration -- result is signed |
77 | date_duration& operator-= (const date_duration& rhs) |
78 | { |
79 | base_type::operator-= (rhs); |
80 | return *this; |
81 | } |
82 | friend date_duration operator- (date_duration rhs, date_duration const& lhs) |
83 | { |
84 | rhs -= lhs; |
85 | return rhs; |
86 | } |
87 | |
88 | //! Add a duration -- result is signed |
89 | date_duration& operator+= (const date_duration& rhs) |
90 | { |
91 | base_type::operator+= (rhs); |
92 | return *this; |
93 | } |
94 | friend date_duration operator+ (date_duration rhs, date_duration const& lhs) |
95 | { |
96 | rhs += lhs; |
97 | return rhs; |
98 | } |
99 | |
100 | //! unary- Allows for dd = -date_duration(2); -> dd == -2 |
101 | date_duration operator- ()const |
102 | { |
103 | return date_duration(get_rep() * (-1)); |
104 | } |
105 | |
106 | //! Division operations on a duration with an integer. |
107 | date_duration& operator/= (int divisor) |
108 | { |
109 | base_type::operator/= (divisor); |
110 | return *this; |
111 | } |
112 | friend date_duration operator/ (date_duration rhs, int lhs) |
113 | { |
114 | rhs /= lhs; |
115 | return rhs; |
116 | } |
117 | |
118 | //! Returns the smallest duration -- used by to calculate 'end' |
119 | static date_duration unit() |
120 | { |
121 | return date_duration(base_type::unit().get_rep()); |
122 | } |
123 | }; |
124 | |
125 | //! Shorthand for date_duration |
126 | typedef date_duration days; |
127 | |
128 | } } //namespace gregorian |
129 | |
130 | #if defined(BOOST_DATE_TIME_OPTIONAL_GREGORIAN_TYPES) |
131 | #include <boost/date_time/date_duration_types.hpp> |
132 | #endif |
133 | |
134 | #endif |
135 | |