Ugly, not-to-be-pushed sucking in of all of Boost to get windows to work.
[dyninst.git] / external / boost / date_time / time_system_split.hpp
1 #ifndef DATE_TIME_TIME_SYSTEM_SPLIT_HPP
2 #define DATE_TIME_TIME_SYSTEM_SPLIT_HPP
3
4 /* Copyright (c) 2002,2003,2005 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 or http://www.boost.org/LICENSE-1.0)
8  * Author: Jeff Garland, Bart Garst
9  * $Date: 2005/05/25 14:15:40 $
10  */
11
12
13 #include <string>
14 #include "boost/date_time/compiler_config.hpp"
15 #include "boost/date_time/special_defs.hpp"
16
17 namespace boost {
18 namespace date_time {
19
20   //! An unadjusted time system implementation.
21 #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))  
22   template<typename config, boost::int32_t ticks_per_second>
23 #else
24   template<typename config>
25 #endif
26   class split_timedate_system
27   {
28    public:
29     typedef typename config::time_rep_type time_rep_type;
30     typedef typename config::date_type     date_type;
31     typedef typename config::time_duration_type time_duration_type;
32     typedef typename config::date_duration_type date_duration_type;
33     typedef typename config::int_type int_type;
34     typedef typename config::resolution_traits   resolution_traits;
35
36     //86400 is number of seconds in a day...
37 #if (defined(BOOST_DATE_TIME_NO_MEMBER_INIT))  
38     typedef date_time::wrapping_int<int_type, INT64_C(86400) * ticks_per_second > wrap_int_type;
39 #else
40    private:
41      BOOST_STATIC_CONSTANT(int_type, ticks_per_day = INT64_C(86400) * config::tick_per_second);
42    public:
43     typedef date_time::wrapping_int<int_type, ticks_per_day> wrap_int_type;
44 #endif
45
46     static time_rep_type get_time_rep(special_values sv)
47     {
48       switch (sv) {
49       case not_a_date_time:
50         return time_rep_type(date_type(not_a_date_time),
51                              time_duration_type(not_a_date_time));
52       case pos_infin:
53         return time_rep_type(date_type(pos_infin), 
54                              time_duration_type(pos_infin));
55       case neg_infin:
56         return time_rep_type(date_type(neg_infin), 
57                              time_duration_type(neg_infin));
58       case max_date_time: {
59         time_duration_type td = time_duration_type(24,0,0,0) - time_duration_type(0,0,0,1);
60         return time_rep_type(date_type(max_date_time), td);
61       }
62       case min_date_time:
63         return time_rep_type(date_type(min_date_time), time_duration_type(0,0,0,0));
64
65       default:
66         return time_rep_type(date_type(not_a_date_time),
67                              time_duration_type(not_a_date_time));
68         
69       }
70
71     }
72
73     static time_rep_type get_time_rep(const date_type& day,
74                                       const time_duration_type& tod,
75                                       date_time::dst_flags dst=not_dst)
76     {
77       if(day.is_special() || tod.is_special()) {
78         if(day.is_not_a_date() || tod.is_not_a_date_time()) {
79           return time_rep_type(date_type(not_a_date_time),
80                                time_duration_type(not_a_date_time));
81         }
82         else if(day.is_pos_infinity()) {
83           if(tod.is_neg_infinity()) {
84             return time_rep_type(date_type(not_a_date_time),
85                                  time_duration_type(not_a_date_time));
86           }
87           else {
88             return time_rep_type(day, time_duration_type(pos_infin));
89           }
90         }
91         else if(day.is_neg_infinity()) {
92           if(tod.is_pos_infinity()) {
93             return time_rep_type(date_type(not_a_date_time),
94                                  time_duration_type(not_a_date_time));
95           }
96           else {
97             return time_rep_type(day, time_duration_type(neg_infin));
98           }
99         }
100         else if(tod.is_pos_infinity()) {
101           if(day.is_neg_infinity()) {
102             return time_rep_type(date_type(not_a_date_time),
103                                  time_duration_type(not_a_date_time));
104           }
105           else {
106             return time_rep_type(date_type(pos_infin), tod);
107           }
108         }
109         else if(tod.is_neg_infinity()) {
110           if(day.is_pos_infinity()) {
111             return time_rep_type(date_type(not_a_date_time),
112                                  time_duration_type(not_a_date_time));
113           }
114           else {
115             return time_rep_type(date_type(neg_infin), tod);
116           }
117         }
118       }
119       return time_rep_type(day, tod);
120     }
121     static date_type get_date(const time_rep_type& val)
122     {
123       return date_type(val.day);
124     }
125     static time_duration_type get_time_of_day(const time_rep_type& val)
126     {
127       return time_duration_type(val.time_of_day);
128     }
129     static std::string zone_name(const time_rep_type&)
130     {
131       return "";
132     }
133     static bool is_equal(const time_rep_type& lhs, const time_rep_type& rhs)
134     {
135       return ((lhs.day == rhs.day) && (lhs.time_of_day == rhs.time_of_day));
136     }
137     static bool is_less(const time_rep_type& lhs, const time_rep_type& rhs)
138     {
139       if (lhs.day < rhs.day) return true;
140       if (lhs.day > rhs.day) return false;
141       return (lhs.time_of_day < rhs.time_of_day);
142     }
143     static time_rep_type add_days(const time_rep_type& base,
144                                   const date_duration_type& dd)
145     {
146       return time_rep_type(base.day+dd, base.time_of_day);
147     }
148     static time_rep_type subtract_days(const time_rep_type& base,
149                                        const date_duration_type& dd)
150     {
151       return split_timedate_system::get_time_rep(base.day-dd, base.time_of_day);
152     }
153     static time_rep_type subtract_time_duration(const time_rep_type& base,
154                                                 const time_duration_type& td)
155     {
156       if(base.day.is_special() || td.is_special())
157       {
158         return split_timedate_system::get_time_rep(base.day, -td);
159       }
160       if (td.is_negative()) {
161         time_duration_type td1 = td.invert_sign();
162         return add_time_duration(base,td1);
163       }
164
165       //std::cout << td.ticks() << std::endl;
166       wrap_int_type  day_offset(base.time_of_day.ticks());
167       date_duration_type day_overflow(static_cast<typename date_duration_type::duration_rep_type>(day_offset.subtract(td.ticks())));
168 //       std::cout << "sub: " << base.time_of_day.ticks() << "|"
169 //                 << day_offset.as_int() << "|"
170 //                 << day_overflow.days() << std::endl;
171       return time_rep_type(base.day-day_overflow,
172                            time_duration_type(0,0,0,day_offset.as_int()));
173     }
174     static time_rep_type add_time_duration(const time_rep_type& base,
175                                            time_duration_type td)
176     {
177       if(base.day.is_special() || td.is_special()) {
178         return split_timedate_system::get_time_rep(base.day, td);
179       }
180       if (td.is_negative()) {
181         time_duration_type td1 = td.invert_sign();
182         return subtract_time_duration(base,td1);
183       }
184       wrap_int_type day_offset(base.time_of_day.ticks());      
185       typename date_duration_type::duration_rep_type doff = day_offset.add(td.ticks());
186 //       std::cout << "day overflow: " << doff << std::endl;
187 //       std::cout << "ticks: "         << td.ticks() << std::endl;
188       date_duration_type day_overflow(doff);
189 //       std::cout << "base: " << to_simple_string(base.day) << std::endl;
190 //       std::cout << "overflow " << day_overflow.days() << std::endl;
191       return time_rep_type(base.day+day_overflow,
192                            time_duration_type(0,0,0,day_offset.as_int()));
193     }
194     static time_duration_type subtract_times(const time_rep_type& lhs,
195                                              const time_rep_type& rhs)
196     {
197       date_duration_type dd = lhs.day - rhs.day;
198       time_duration_type td(dd.days()*24,0,0); //days * 24 hours
199       time_duration_type td2 = lhs.time_of_day - rhs.time_of_day;
200       return td+td2;
201       // return time_rep_type(base.day-dd, base.time_of_day);
202     }
203     
204   };
205
206 } } //namespace date_time
207
208
209 #endif