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