| #ifndef DATE_DURATION_TYPES_HPP___ |
| #define DATE_DURATION_TYPES_HPP___ |
| |
| /* Copyright (c) 2004 CrystalClear Software, Inc. |
| * Subject to the Boost Software License, Version 1.0. |
| * (See accompanying file LICENSE_1_0.txt or |
| * http://www.boost.org/LICENSE_1_0.txt) |
| * Author: Jeff Garland, Bart Garst |
| * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
| */ |
| |
| #include <boost/date_time/int_adapter.hpp> |
| #include <boost/date_time/special_defs.hpp> |
| #include <boost/date_time/date_duration.hpp> |
| |
| namespace boost { |
| namespace date_time { |
| |
| |
| //! Additional duration type that represents a number of n*7 days |
| template <class duration_config> |
| class weeks_duration : public date_duration<duration_config> { |
| public: |
| weeks_duration(typename duration_config::impl_type w) |
| : date_duration<duration_config>(w * 7) {} |
| weeks_duration(special_values sv) |
| : date_duration<duration_config>(sv) {} |
| }; |
| |
| // predeclare |
| template<class t> |
| class years_duration; |
| |
| //! additional duration type that represents a logical month |
| /*! A logical month enables things like: "date(2002,Mar,2) + months(2) -> |
| * 2002-May2". If the date is a last day-of-the-month, the result will |
| * also be a last-day-of-the-month. |
| */ |
| template<class base_config> |
| class months_duration |
| { |
| private: |
| typedef typename base_config::int_rep int_rep; |
| typedef typename int_rep::int_type int_type; |
| typedef typename base_config::date_type date_type; |
| typedef typename date_type::duration_type duration_type; |
| typedef typename base_config::month_adjustor_type month_adjustor_type; |
| typedef months_duration<base_config> months_type; |
| typedef years_duration<base_config> years_type; |
| public: |
| months_duration(int_rep num) : _m(num) {} |
| months_duration(special_values sv) : _m(sv) |
| { |
| _m = int_rep::from_special(sv); |
| } |
| int_rep number_of_months() const { return _m; } |
| //! returns a negative duration |
| duration_type get_neg_offset(const date_type& d) const |
| { |
| month_adjustor_type m_adj(_m.as_number()); |
| return duration_type(m_adj.get_neg_offset(d)); |
| } |
| duration_type get_offset(const date_type& d) const |
| { |
| month_adjustor_type m_adj(_m.as_number()); |
| return duration_type(m_adj.get_offset(d)); |
| } |
| bool operator==(const months_type& rhs) const |
| { |
| return(_m == rhs._m); |
| } |
| bool operator!=(const months_type& rhs) const |
| { |
| return(_m != rhs._m); |
| } |
| months_type operator+(const months_type& rhs)const |
| { |
| return months_type(_m + rhs._m); |
| } |
| months_type& operator+=(const months_type& rhs) |
| { |
| _m = _m + rhs._m; |
| return *this; |
| } |
| months_type operator-(const months_type& rhs)const |
| { |
| return months_type(_m - rhs._m); |
| } |
| months_type& operator-=(const months_type& rhs) |
| { |
| _m = _m - rhs._m; |
| return *this; |
| } |
| months_type operator*(const int_type rhs)const |
| { |
| return months_type(_m * rhs); |
| } |
| months_type& operator*=(const int_type rhs) |
| { |
| _m = _m * rhs; |
| return *this; |
| } |
| months_type operator/(const int_type rhs)const |
| { |
| return months_type(_m / rhs); |
| } |
| months_type& operator/=(const int_type rhs) |
| { |
| _m = _m / rhs; |
| return *this; |
| } |
| months_type operator+(const years_type& y)const |
| { |
| return months_type(y.number_of_years() * 12 + _m); |
| } |
| months_type& operator+=(const years_type& y) |
| { |
| _m = y.number_of_years() * 12 + _m; |
| return *this; |
| } |
| months_type operator-(const years_type& y) const |
| { |
| return months_type(_m - y.number_of_years() * 12); |
| } |
| months_type& operator-=(const years_type& y) |
| { |
| _m = _m - y.number_of_years() * 12; |
| return *this; |
| } |
| |
| // |
| friend date_type operator+(const date_type& d, const months_type& m) |
| { |
| return d + m.get_offset(d); |
| } |
| friend date_type operator+=(date_type& d, const months_type& m) |
| { |
| return d += m.get_offset(d); |
| } |
| friend date_type operator-(const date_type& d, const months_type& m) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return d + m.get_neg_offset(d); |
| } |
| friend date_type operator-=(date_type& d, const months_type& m) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return d += m.get_neg_offset(d); |
| } |
| |
| private: |
| int_rep _m; |
| }; |
| |
| //! additional duration type that represents a logical year |
| /*! A logical year enables things like: "date(2002,Mar,2) + years(2) -> |
| * 2004-Mar-2". If the date is a last day-of-the-month, the result will |
| * also be a last-day-of-the-month (ie date(2001-Feb-28) + years(3) -> |
| * 2004-Feb-29). |
| */ |
| template<class base_config> |
| class years_duration |
| { |
| private: |
| typedef typename base_config::int_rep int_rep; |
| typedef typename int_rep::int_type int_type; |
| typedef typename base_config::date_type date_type; |
| typedef typename date_type::duration_type duration_type; |
| typedef typename base_config::month_adjustor_type month_adjustor_type; |
| typedef years_duration<base_config> years_type; |
| typedef months_duration<base_config> months_type; |
| public: |
| years_duration(int_rep num) : _y(num) {} |
| years_duration(special_values sv) : _y(sv) |
| { |
| _y = int_rep::from_special(sv); |
| } |
| int_rep number_of_years() const { return _y; } |
| //! returns a negative duration |
| duration_type get_neg_offset(const date_type& d) const |
| { |
| month_adjustor_type m_adj(_y.as_number() * 12); |
| return duration_type(m_adj.get_neg_offset(d)); |
| } |
| duration_type get_offset(const date_type& d) const |
| { |
| month_adjustor_type m_adj(_y.as_number() * 12); |
| return duration_type(m_adj.get_offset(d)); |
| } |
| bool operator==(const years_type& rhs) const |
| { |
| return(_y == rhs._y); |
| } |
| bool operator!=(const years_type& rhs) const |
| { |
| return(_y != rhs._y); |
| } |
| years_type operator+(const years_type& rhs)const |
| { |
| return years_type(_y + rhs._y); |
| } |
| years_type& operator+=(const years_type& rhs) |
| { |
| _y = _y + rhs._y; |
| return *this; |
| } |
| years_type operator-(const years_type& rhs)const |
| { |
| return years_type(_y - rhs._y); |
| } |
| years_type& operator-=(const years_type& rhs) |
| { |
| _y = _y - rhs._y; |
| return *this; |
| } |
| years_type operator*(const int_type rhs)const |
| { |
| return years_type(_y * rhs); |
| } |
| years_type& operator*=(const int_type rhs) |
| { |
| _y = _y * rhs; |
| return *this; |
| } |
| years_type operator/(const int_type rhs)const |
| { |
| return years_type(_y / rhs); |
| } |
| years_type& operator/=(const int_type rhs) |
| { |
| _y = _y / rhs; |
| return *this; |
| } |
| months_type operator+(const months_type& m) const |
| { |
| return(months_type(_y * 12 + m.number_of_months())); |
| } |
| months_type operator-(const months_type& m) const |
| { |
| return(months_type(_y * 12 - m.number_of_months())); |
| } |
| |
| // |
| friend date_type operator+(const date_type& d, const years_type& y) |
| { |
| return d + y.get_offset(d); |
| } |
| friend date_type operator+=(date_type& d, const years_type& y) |
| { |
| return d += y.get_offset(d); |
| } |
| friend date_type operator-(const date_type& d, const years_type& y) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return d + y.get_neg_offset(d); |
| } |
| friend date_type operator-=(date_type& d, const years_type& y) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return d += y.get_neg_offset(d); |
| } |
| |
| private: |
| int_rep _y; |
| }; |
| |
| }} // namespace boost::date_time |
| |
| #endif // DATE_DURATION_TYPES_HPP___ |