[857] | 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 or
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| 7 | * http://www.boost.org/LICENSE-1.0)
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| 8 | * Author: Jeff Garland, Bart Garst
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| 9 | * $Date: 2004/07/17 22:20:18 $
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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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