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1 | #ifndef LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__ |
2 | #define LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__ | |
3 | ||
4 | /* Copyright (c) 2003-2005 CrystalClear Software, Inc. | |
5 | * Subject to the Boost Software License, Version 1.0. | |
6 | * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) | |
7 | * Author: Jeff Garland, Bart Garst | |
8 | * $Date$ | |
9 | */ | |
10 | ||
11 | #include "boost/date_time/time_zone_base.hpp" | |
12 | #include "boost/date_time/time_zone_names.hpp" | |
13 | #include "boost/date_time/posix_time/posix_time.hpp" | |
14 | #include "boost/date_time/local_time/dst_transition_day_rules.hpp" | |
15 | #include "boost/date_time/string_convert.hpp" | |
16 | //#include "boost/date_time/special_defs.hpp" | |
17 | #include "boost/shared_ptr.hpp" | |
18 | ||
19 | namespace boost { | |
20 | namespace local_time { | |
21 | ||
22 | //typedef boost::date_time::time_zone_names time_zone_names; | |
23 | typedef boost::date_time::dst_adjustment_offsets<boost::posix_time::time_duration> dst_adjustment_offsets; | |
24 | //typedef boost::date_time::time_zone_base<boost::posix_time::ptime> time_zone; | |
25 | typedef boost::shared_ptr<dst_calc_rule> dst_calc_rule_ptr; | |
26 | ||
27 | //! A real time zone | |
28 | template<class CharT> | |
29 | class custom_time_zone_base : public date_time::time_zone_base<posix_time::ptime,CharT> { | |
30 | public: | |
31 | typedef boost::posix_time::time_duration time_duration_type; | |
32 | typedef date_time::time_zone_base<posix_time::ptime,CharT> base_type; | |
33 | typedef typename base_type::string_type string_type; | |
34 | typedef typename base_type::stringstream_type stringstream_type; | |
35 | typedef date_time::time_zone_names_base<CharT> time_zone_names; | |
36 | typedef CharT char_type; | |
37 | ||
38 | custom_time_zone_base(const time_zone_names& zone_names, | |
39 | const time_duration_type& utc_offset, | |
40 | const dst_adjustment_offsets& dst_shift, | |
41 | boost::shared_ptr<dst_calc_rule> calc_rule) : | |
42 | zone_names_(zone_names), | |
43 | base_utc_offset_(utc_offset), | |
44 | dst_offsets_(dst_shift), | |
45 | dst_calc_rules_(calc_rule) | |
46 | {} | |
47 | virtual ~custom_time_zone_base() {} | |
48 | virtual string_type dst_zone_abbrev() const | |
49 | { | |
50 | return zone_names_.dst_zone_abbrev(); | |
51 | } | |
52 | virtual string_type std_zone_abbrev() const | |
53 | { | |
54 | return zone_names_.std_zone_abbrev(); | |
55 | } | |
56 | virtual string_type dst_zone_name() const | |
57 | { | |
58 | return zone_names_.dst_zone_name(); | |
59 | } | |
60 | virtual string_type std_zone_name() const | |
61 | { | |
62 | return zone_names_.std_zone_name(); | |
63 | } | |
64 | //! True if zone uses daylight savings adjustments | |
65 | virtual bool has_dst() const | |
66 | { | |
67 | return (bool) dst_calc_rules_; //if calc_rule is set the tz has dst | |
68 | } | |
69 | //! Local time that DST starts -- NADT if has_dst is false | |
70 | virtual posix_time::ptime dst_local_start_time(gregorian::greg_year y) const | |
71 | { | |
72 | gregorian::date d(gregorian::not_a_date_time); | |
73 | if (dst_calc_rules_) { | |
74 | d = dst_calc_rules_->start_day(y); | |
75 | } | |
76 | return posix_time::ptime(d, dst_offsets_.dst_start_offset_); | |
77 | } | |
78 | //! Local time that DST ends -- NADT if has_dst is false | |
79 | virtual posix_time::ptime dst_local_end_time(gregorian::greg_year y) const | |
80 | { | |
81 | gregorian::date d(gregorian::not_a_date_time); | |
82 | if (dst_calc_rules_) { | |
83 | d = dst_calc_rules_->end_day(y); | |
84 | } | |
85 | return posix_time::ptime(d, dst_offsets_.dst_end_offset_); | |
86 | } | |
87 | //! Base offset from UTC for zone (eg: -07:30:00) | |
88 | virtual time_duration_type base_utc_offset() const | |
89 | { | |
90 | return base_utc_offset_; | |
91 | } | |
92 | //! Adjustment forward or back made while DST is in effect | |
93 | virtual time_duration_type dst_offset() const | |
94 | { | |
95 | return dst_offsets_.dst_adjust_; | |
96 | } | |
97 | //! Returns a POSIX time_zone string for this object | |
98 | virtual string_type to_posix_string() const | |
99 | { | |
100 | // std offset dst [offset],start[/time],end[/time] - w/o spaces | |
101 | stringstream_type ss; | |
102 | ss.fill('0'); | |
103 | boost::shared_ptr<dst_calc_rule> no_rules; | |
104 | // std | |
105 | ss << std_zone_abbrev(); | |
106 | // offset | |
107 | if(base_utc_offset().is_negative()) { | |
108 | // inverting the sign guarantees we get two digits | |
109 | ss << '-' << std::setw(2) << base_utc_offset().invert_sign().hours(); | |
110 | } | |
111 | else { | |
112 | ss << '+' << std::setw(2) << base_utc_offset().hours(); | |
113 | } | |
114 | if(base_utc_offset().minutes() != 0 || base_utc_offset().seconds() != 0) { | |
115 | ss << ':' << std::setw(2) << base_utc_offset().minutes(); | |
116 | if(base_utc_offset().seconds() != 0) { | |
117 | ss << ':' << std::setw(2) << base_utc_offset().seconds(); | |
118 | } | |
119 | } | |
120 | if(dst_calc_rules_ != no_rules) { | |
121 | // dst | |
122 | ss << dst_zone_abbrev(); | |
123 | // dst offset | |
124 | if(dst_offset().is_negative()) { | |
125 | // inverting the sign guarantees we get two digits | |
126 | ss << '-' << std::setw(2) << dst_offset().invert_sign().hours(); | |
127 | } | |
128 | else { | |
129 | ss << '+' << std::setw(2) << dst_offset().hours(); | |
130 | } | |
131 | if(dst_offset().minutes() != 0 || dst_offset().seconds() != 0) { | |
132 | ss << ':' << std::setw(2) << dst_offset().minutes(); | |
133 | if(dst_offset().seconds() != 0) { | |
134 | ss << ':' << std::setw(2) << dst_offset().seconds(); | |
135 | } | |
136 | } | |
137 | // start/time | |
138 | ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->start_rule_as_string()) << '/' | |
139 | << std::setw(2) << dst_offsets_.dst_start_offset_.hours() << ':' | |
140 | << std::setw(2) << dst_offsets_.dst_start_offset_.minutes(); | |
141 | if(dst_offsets_.dst_start_offset_.seconds() != 0) { | |
142 | ss << ':' << std::setw(2) << dst_offsets_.dst_start_offset_.seconds(); | |
143 | } | |
144 | // end/time | |
145 | ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->end_rule_as_string()) << '/' | |
146 | << std::setw(2) << dst_offsets_.dst_end_offset_.hours() << ':' | |
147 | << std::setw(2) << dst_offsets_.dst_end_offset_.minutes(); | |
148 | if(dst_offsets_.dst_end_offset_.seconds() != 0) { | |
149 | ss << ':' << std::setw(2) << dst_offsets_.dst_end_offset_.seconds(); | |
150 | } | |
151 | } | |
152 | ||
153 | return ss.str(); | |
154 | } | |
155 | private: | |
156 | time_zone_names zone_names_; | |
157 | bool has_dst_; | |
158 | time_duration_type base_utc_offset_; | |
159 | dst_adjustment_offsets dst_offsets_; | |
160 | boost::shared_ptr<dst_calc_rule> dst_calc_rules_; | |
161 | }; | |
162 | ||
163 | typedef custom_time_zone_base<char> custom_time_zone; | |
164 | ||
165 | } }//namespace | |
166 | ||
167 | ||
168 | ||
169 | #endif |