[44] | 1 | #ifndef DATE_DURATION_TYPES_HPP___ |
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| 2 | #define DATE_DURATION_TYPES_HPP___ |
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| 3 | |
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| 4 | /* Copyright (c) 2004 CrystalClear Software, Inc. |
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| 5 | * Subject to the Boost Software License, Version 1.0. |
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| 6 | * (See accompanying file LICENSE_1_0.txt or |
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| 7 | * http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | * Author: Jeff Garland, Bart Garst |
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| 9 | * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
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| 10 | */ |
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| 11 | |
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| 12 | #include <boost/date_time/int_adapter.hpp> |
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| 13 | #include <boost/date_time/special_defs.hpp> |
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| 14 | #include <boost/date_time/date_duration.hpp> |
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| 15 | |
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| 16 | namespace boost { |
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| 17 | namespace date_time { |
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| 18 | |
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| 19 | |
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| 20 | //! Additional duration type that represents a number of n*7 days |
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| 21 | template <class duration_config> |
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| 22 | class weeks_duration : public date_duration<duration_config> { |
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| 23 | public: |
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| 24 | weeks_duration(typename duration_config::impl_type w) |
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| 25 | : date_duration<duration_config>(w * 7) {} |
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| 26 | weeks_duration(special_values sv) |
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| 27 | : date_duration<duration_config>(sv) {} |
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| 28 | }; |
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| 29 | |
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| 30 | // predeclare |
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| 31 | template<class t> |
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| 32 | class years_duration; |
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| 33 | |
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| 34 | //! additional duration type that represents a logical month |
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| 35 | /*! A logical month enables things like: "date(2002,Mar,2) + months(2) -> |
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| 36 | * 2002-May2". If the date is a last day-of-the-month, the result will |
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| 37 | * also be a last-day-of-the-month. |
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| 38 | */ |
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| 39 | template<class base_config> |
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| 40 | class months_duration |
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| 41 | { |
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| 42 | private: |
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| 43 | typedef typename base_config::int_rep int_rep; |
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| 44 | typedef typename int_rep::int_type int_type; |
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| 45 | typedef typename base_config::date_type date_type; |
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| 46 | typedef typename date_type::duration_type duration_type; |
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| 47 | typedef typename base_config::month_adjustor_type month_adjustor_type; |
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| 48 | typedef months_duration<base_config> months_type; |
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| 49 | typedef years_duration<base_config> years_type; |
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| 50 | public: |
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| 51 | months_duration(int_rep num) : _m(num) {} |
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| 52 | months_duration(special_values sv) : _m(sv) |
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| 53 | { |
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| 54 | _m = int_rep::from_special(sv); |
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| 55 | } |
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| 56 | int_rep number_of_months() const { return _m; } |
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| 57 | //! returns a negative duration |
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| 58 | duration_type get_neg_offset(const date_type& d) const |
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| 59 | { |
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| 60 | month_adjustor_type m_adj(_m.as_number()); |
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| 61 | return duration_type(m_adj.get_neg_offset(d)); |
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| 62 | } |
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| 63 | duration_type get_offset(const date_type& d) const |
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| 64 | { |
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| 65 | month_adjustor_type m_adj(_m.as_number()); |
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| 66 | return duration_type(m_adj.get_offset(d)); |
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| 67 | } |
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| 68 | bool operator==(const months_type& rhs) const |
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| 69 | { |
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| 70 | return(_m == rhs._m); |
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| 71 | } |
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| 72 | bool operator!=(const months_type& rhs) const |
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| 73 | { |
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| 74 | return(_m != rhs._m); |
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| 75 | } |
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| 76 | months_type operator+(const months_type& rhs)const |
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| 77 | { |
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| 78 | return months_type(_m + rhs._m); |
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| 79 | } |
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| 80 | months_type& operator+=(const months_type& rhs) |
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| 81 | { |
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| 82 | _m = _m + rhs._m; |
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| 83 | return *this; |
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| 84 | } |
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| 85 | months_type operator-(const months_type& rhs)const |
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| 86 | { |
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| 87 | return months_type(_m - rhs._m); |
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| 88 | } |
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| 89 | months_type& operator-=(const months_type& rhs) |
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| 90 | { |
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| 91 | _m = _m - rhs._m; |
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| 92 | return *this; |
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| 93 | } |
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| 94 | months_type operator*(const int_type rhs)const |
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| 95 | { |
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| 96 | return months_type(_m * rhs); |
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| 97 | } |
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| 98 | months_type& operator*=(const int_type rhs) |
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| 99 | { |
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| 100 | _m = _m * rhs; |
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| 101 | return *this; |
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| 102 | } |
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| 103 | months_type operator/(const int_type rhs)const |
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| 104 | { |
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| 105 | return months_type(_m / rhs); |
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| 106 | } |
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| 107 | months_type& operator/=(const int_type rhs) |
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| 108 | { |
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| 109 | _m = _m / rhs; |
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| 110 | return *this; |
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| 111 | } |
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| 112 | months_type operator+(const years_type& y)const |
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| 113 | { |
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| 114 | return months_type(y.number_of_years() * 12 + _m); |
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| 115 | } |
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| 116 | months_type& operator+=(const years_type& y) |
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| 117 | { |
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| 118 | _m = y.number_of_years() * 12 + _m; |
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| 119 | return *this; |
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| 120 | } |
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| 121 | months_type operator-(const years_type& y) const |
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| 122 | { |
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| 123 | return months_type(_m - y.number_of_years() * 12); |
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| 124 | } |
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| 125 | months_type& operator-=(const years_type& y) |
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| 126 | { |
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| 127 | _m = _m - y.number_of_years() * 12; |
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| 128 | return *this; |
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| 129 | } |
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| 130 | |
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| 131 | // |
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| 132 | friend date_type operator+(const date_type& d, const months_type& m) |
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| 133 | { |
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| 134 | return d + m.get_offset(d); |
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| 135 | } |
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| 136 | friend date_type operator+=(date_type& d, const months_type& m) |
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| 137 | { |
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| 138 | return d += m.get_offset(d); |
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| 139 | } |
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| 140 | friend date_type operator-(const date_type& d, const months_type& m) |
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| 141 | { |
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| 142 | // get_neg_offset returns a negative duration, so we add |
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| 143 | return d + m.get_neg_offset(d); |
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| 144 | } |
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| 145 | friend date_type operator-=(date_type& d, const months_type& m) |
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| 146 | { |
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| 147 | // get_neg_offset returns a negative duration, so we add |
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| 148 | return d += m.get_neg_offset(d); |
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| 149 | } |
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| 150 | |
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| 151 | private: |
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| 152 | int_rep _m; |
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| 153 | }; |
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| 154 | |
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| 155 | //! additional duration type that represents a logical year |
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| 156 | /*! A logical year enables things like: "date(2002,Mar,2) + years(2) -> |
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| 157 | * 2004-Mar-2". If the date is a last day-of-the-month, the result will |
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| 158 | * also be a last-day-of-the-month (ie date(2001-Feb-28) + years(3) -> |
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| 159 | * 2004-Feb-29). |
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| 160 | */ |
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| 161 | template<class base_config> |
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| 162 | class years_duration |
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| 163 | { |
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| 164 | private: |
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| 165 | typedef typename base_config::int_rep int_rep; |
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| 166 | typedef typename int_rep::int_type int_type; |
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| 167 | typedef typename base_config::date_type date_type; |
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| 168 | typedef typename date_type::duration_type duration_type; |
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| 169 | typedef typename base_config::month_adjustor_type month_adjustor_type; |
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| 170 | typedef years_duration<base_config> years_type; |
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| 171 | typedef months_duration<base_config> months_type; |
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| 172 | public: |
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| 173 | years_duration(int_rep num) : _y(num) {} |
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| 174 | years_duration(special_values sv) : _y(sv) |
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| 175 | { |
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| 176 | _y = int_rep::from_special(sv); |
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| 177 | } |
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| 178 | int_rep number_of_years() const { return _y; } |
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| 179 | //! returns a negative duration |
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| 180 | duration_type get_neg_offset(const date_type& d) const |
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| 181 | { |
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| 182 | month_adjustor_type m_adj(_y.as_number() * 12); |
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| 183 | return duration_type(m_adj.get_neg_offset(d)); |
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| 184 | } |
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| 185 | duration_type get_offset(const date_type& d) const |
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| 186 | { |
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| 187 | month_adjustor_type m_adj(_y.as_number() * 12); |
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| 188 | return duration_type(m_adj.get_offset(d)); |
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| 189 | } |
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| 190 | bool operator==(const years_type& rhs) const |
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| 191 | { |
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| 192 | return(_y == rhs._y); |
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| 193 | } |
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| 194 | bool operator!=(const years_type& rhs) const |
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| 195 | { |
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| 196 | return(_y != rhs._y); |
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| 197 | } |
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| 198 | years_type operator+(const years_type& rhs)const |
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| 199 | { |
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| 200 | return years_type(_y + rhs._y); |
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| 201 | } |
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| 202 | years_type& operator+=(const years_type& rhs) |
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| 203 | { |
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| 204 | _y = _y + rhs._y; |
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| 205 | return *this; |
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| 206 | } |
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| 207 | years_type operator-(const years_type& rhs)const |
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| 208 | { |
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| 209 | return years_type(_y - rhs._y); |
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| 210 | } |
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| 211 | years_type& operator-=(const years_type& rhs) |
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| 212 | { |
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| 213 | _y = _y - rhs._y; |
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| 214 | return *this; |
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| 215 | } |
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| 216 | years_type operator*(const int_type rhs)const |
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| 217 | { |
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| 218 | return years_type(_y * rhs); |
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| 219 | } |
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| 220 | years_type& operator*=(const int_type rhs) |
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| 221 | { |
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| 222 | _y = _y * rhs; |
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| 223 | return *this; |
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| 224 | } |
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| 225 | years_type operator/(const int_type rhs)const |
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| 226 | { |
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| 227 | return years_type(_y / rhs); |
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| 228 | } |
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| 229 | years_type& operator/=(const int_type rhs) |
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| 230 | { |
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| 231 | _y = _y / rhs; |
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| 232 | return *this; |
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| 233 | } |
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| 234 | months_type operator+(const months_type& m) const |
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| 235 | { |
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| 236 | return(months_type(_y * 12 + m.number_of_months())); |
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| 237 | } |
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| 238 | months_type operator-(const months_type& m) const |
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| 239 | { |
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| 240 | return(months_type(_y * 12 - m.number_of_months())); |
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| 241 | } |
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| 242 | |
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| 243 | // |
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| 244 | friend date_type operator+(const date_type& d, const years_type& y) |
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| 245 | { |
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| 246 | return d + y.get_offset(d); |
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| 247 | } |
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| 248 | friend date_type operator+=(date_type& d, const years_type& y) |
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| 249 | { |
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| 250 | return d += y.get_offset(d); |
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| 251 | } |
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| 252 | friend date_type operator-(const date_type& d, const years_type& y) |
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| 253 | { |
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| 254 | // get_neg_offset returns a negative duration, so we add |
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| 255 | return d + y.get_neg_offset(d); |
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| 256 | } |
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| 257 | friend date_type operator-=(date_type& d, const years_type& y) |
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| 258 | { |
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| 259 | // get_neg_offset returns a negative duration, so we add |
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| 260 | return d += y.get_neg_offset(d); |
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| 261 | } |
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| 262 | |
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| 263 | private: |
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| 264 | int_rep _y; |
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| 265 | }; |
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| 266 | |
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| 267 | }} // namespace boost::date_time |
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| 268 | |
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| 269 | #endif // DATE_DURATION_TYPES_HPP___ |
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