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: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
---|
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 (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 |
---|