1 #ifndef DATE_TIME_TIME_DURATION_HPP___
2 #define DATE_TIME_TIME_DURATION_HPP___
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: 2009-06-04 04:24:49 -0400 (Thu, 04 Jun 2009) $
12 #include <boost/cstdint.hpp>
13 #include <boost/operators.hpp>
14 #include <boost/date_time/time_defs.hpp>
15 #include <boost/date_time/special_defs.hpp>
16 #include <boost/date_time/compiler_config.hpp>
22 //! Represents some amount of elapsed time measure to a given resolution
23 /*! This class represents a standard set of capabilities for all
24 counted time durations. Time duration implementations should derive
25 from this class passing their type as the first template parameter.
26 This design allows the subclass duration types to provide custom
27 construction policies or other custom features not provided here.
29 @param T The subclass type
30 @param rep_type The time resolution traits for this duration type.
32 template<class T, typename rep_type>
33 class time_duration : private
34 boost::less_than_comparable<T
35 , boost::equality_comparable<T
37 /* dividable, addable, and subtractable operator templates
38 * won't work with this class (MSVC++ 6.0). return type
39 * from '+=' is different than expected return type
40 * from '+'. multipliable probably wont work
41 * either (haven't tried) */
44 typedef T duration_type; //the subclass
45 typedef rep_type traits_type;
46 typedef typename rep_type::day_type day_type;
47 typedef typename rep_type::hour_type hour_type;
48 typedef typename rep_type::min_type min_type;
49 typedef typename rep_type::sec_type sec_type;
50 typedef typename rep_type::fractional_seconds_type fractional_seconds_type;
51 typedef typename rep_type::tick_type tick_type;
52 typedef typename rep_type::impl_type impl_type;
54 time_duration() : ticks_(0) {}
55 time_duration(hour_type hours_in,
57 sec_type seconds_in=0,
58 fractional_seconds_type frac_sec_in = 0) :
59 ticks_(rep_type::to_tick_count(hours_in,minutes_in,seconds_in,frac_sec_in))
61 // copy constructor required for dividable<>
62 //! Construct from another time_duration (Copy constructor)
63 time_duration(const time_duration<T, rep_type>& other)
64 : ticks_(other.ticks_)
66 //! Construct from special_values
67 time_duration(special_values sv) : ticks_(impl_type::from_special(sv))
69 //! Returns smallest representable duration
70 static duration_type unit()
72 return duration_type(0,0,0,1);
74 //! Return the number of ticks in a second
75 static tick_type ticks_per_second()
77 return rep_type::res_adjust();
79 //! Provide the resolution of this duration type
80 static time_resolutions resolution()
82 return rep_type::resolution();
84 //! Returns number of hours in the duration
85 hour_type hours() const
87 return static_cast<hour_type>(ticks() / (3600*ticks_per_second()));
89 //! Returns normalized number of minutes
90 min_type minutes() const
92 return static_cast<min_type>((ticks() / (60*ticks_per_second())) % 60);
94 //! Returns normalized number of seconds (0..60)
95 sec_type seconds() const
97 return static_cast<sec_type>((ticks()/ticks_per_second()) % 60);
99 //! Returns total number of seconds truncating any fractional seconds
100 sec_type total_seconds() const
102 return static_cast<sec_type>(ticks() / ticks_per_second());
104 //! Returns total number of milliseconds truncating any fractional seconds
105 tick_type total_milliseconds() const
107 if (ticks_per_second() < 1000) {
108 return ticks() * (static_cast<tick_type>(1000) / ticks_per_second());
110 return ticks() / (ticks_per_second() / static_cast<tick_type>(1000)) ;
112 //! Returns total number of nanoseconds truncating any sub millisecond values
113 tick_type total_nanoseconds() const
115 if (ticks_per_second() < 1000000000) {
116 return ticks() * (static_cast<tick_type>(1000000000) / ticks_per_second());
118 return ticks() / (ticks_per_second() / static_cast<tick_type>(1000000000)) ;
120 //! Returns total number of microseconds truncating any sub microsecond values
121 tick_type total_microseconds() const
123 if (ticks_per_second() < 1000000) {
124 return ticks() * (static_cast<tick_type>(1000000) / ticks_per_second());
126 return ticks() / (ticks_per_second() / static_cast<tick_type>(1000000)) ;
128 //! Returns count of fractional seconds at given resolution
129 fractional_seconds_type fractional_seconds() const
131 return (ticks() % ticks_per_second());
133 //! Returns number of possible digits in fractional seconds
134 static unsigned short num_fractional_digits()
136 return rep_type::num_fractional_digits();
138 duration_type invert_sign() const
140 return duration_type(ticks_ * (-1));
142 bool is_negative() const
146 bool operator<(const time_duration& rhs) const
148 return ticks_ < rhs.ticks_;
150 bool operator==(const time_duration& rhs) const
152 return ticks_ == rhs.ticks_;
154 //! unary- Allows for time_duration td = -td1
155 duration_type operator-()const
157 return duration_type(ticks_ * (-1));
159 duration_type operator-(const duration_type& d) const
161 return duration_type(ticks_ - d.ticks_);
163 duration_type operator+(const duration_type& d) const
165 return duration_type(ticks_ + d.ticks_);
167 duration_type operator/(int divisor) const
169 return duration_type(ticks_ / divisor);
171 duration_type operator-=(const duration_type& d)
173 ticks_ = ticks_ - d.ticks_;
174 return duration_type(ticks_);
176 duration_type operator+=(const duration_type& d)
178 ticks_ = ticks_ + d.ticks_;
179 return duration_type(ticks_);
181 //! Division operations on a duration with an integer.
182 duration_type operator/=(int divisor)
184 ticks_ = ticks_ / divisor;
185 return duration_type(ticks_);
187 //! Multiplication operations an a duration with an integer
188 duration_type operator*(int rhs) const
190 return duration_type(ticks_ * rhs);
192 duration_type operator*=(int divisor)
194 ticks_ = ticks_ * divisor;
195 return duration_type(ticks_);
197 tick_type ticks() const
199 return traits_type::as_number(ticks_);
202 //! Is ticks_ a special value?
203 bool is_special()const
205 if(traits_type::is_adapted())
207 return ticks_.is_special();
213 //! Is duration pos-infinity
214 bool is_pos_infinity()const
216 if(traits_type::is_adapted())
218 return ticks_.is_pos_infinity();
224 //! Is duration neg-infinity
225 bool is_neg_infinity()const
227 if(traits_type::is_adapted())
229 return ticks_.is_neg_infinity();
235 //! Is duration not-a-date-time
236 bool is_not_a_date_time()const
238 if(traits_type::is_adapted())
240 return ticks_.is_nan();
247 //! Used for special_values output
248 impl_type get_rep()const
254 explicit time_duration(impl_type in) : ticks_(in) {};
260 //! Template for instantiating derived adjusting durations
261 /* These templates are designed to work with multiples of
262 * 10 for frac_of_second and resoultion adjustment
264 template<class base_duration, boost::int64_t frac_of_second>
265 class subsecond_duration : public base_duration
268 typedef typename base_duration::traits_type traits_type;
269 explicit subsecond_duration(boost::int64_t ss) :
270 base_duration(0,0,0,ss*traits_type::res_adjust()/frac_of_second)
276 } } //namespace date_time