[857] | 1 | #ifndef LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__
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| 2 | #define LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__
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| 3 |
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| 4 | /* Copyright (c) 2003-2005 CrystalClear Software, Inc.
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| 5 | * Subject to the Boost Software License, Version 1.0.
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| 6 | * (See accompanying file LICENSE-1.0 or http://www.boost.org/LICENSE-1.0)
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| 7 | * Author: Jeff Garland, Bart Garst
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| 8 | * $Date: 2005/05/03 14:14:11 $
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| 9 | */
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| 10 |
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| 11 | #include "boost/date_time/time_zone_base.hpp"
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| 12 | #include "boost/date_time/time_zone_names.hpp"
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| 13 | #include "boost/date_time/posix_time/posix_time.hpp"
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| 14 | #include "boost/date_time/local_time/dst_transition_day_rules.hpp"
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| 15 | //#include "boost/date_time/special_defs.hpp"
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| 16 | #include "boost/shared_ptr.hpp"
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| 17 |
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| 18 | namespace boost {
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| 19 | namespace local_time {
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| 20 |
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| 21 | typedef boost::date_time::time_zone_names time_zone_names;
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| 22 | typedef boost::date_time::dst_adjustment_offsets<boost::posix_time::time_duration> dst_adjustment_offsets;
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| 23 | typedef boost::date_time::time_zone_base<boost::posix_time::ptime> time_zone;
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| 24 | typedef boost::shared_ptr<dst_calc_rule> dst_calc_rule_ptr;
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| 25 |
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| 26 | //! A real time zone
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| 27 | class custom_time_zone : public time_zone {
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| 28 | public:
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| 29 | typedef boost::posix_time::time_duration time_duration_type;
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| 30 | typedef time_zone base_type;
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| 31 | typedef base_type::string_type string_type;
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| 32 | typedef base_type::stringstream_type stringstream_type;
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| 33 | custom_time_zone(const time_zone_names& zone_names,
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| 34 | const time_duration_type& base_utc_offset,
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| 35 | const dst_adjustment_offsets& dst_offset,
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| 36 | boost::shared_ptr<dst_calc_rule> calc_rule) :
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| 37 | zone_names_(zone_names),
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| 38 | base_utc_offset_(base_utc_offset),
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| 39 | dst_offsets_(dst_offset),
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| 40 | dst_calc_rules_(calc_rule)
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| 41 | {};
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| 42 | virtual ~custom_time_zone() {};
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| 43 | virtual std::string dst_zone_abbrev() const
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| 44 | {
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| 45 | return zone_names_.dst_zone_abbrev();
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| 46 | }
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| 47 | virtual std::string std_zone_abbrev() const
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| 48 | {
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| 49 | return zone_names_.std_zone_abbrev();
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| 50 | }
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| 51 | virtual std::string dst_zone_name() const
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| 52 | {
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| 53 | return zone_names_.dst_zone_name();
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| 54 | }
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| 55 | virtual std::string std_zone_name() const
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| 56 | {
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| 57 | return zone_names_.std_zone_name();
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| 58 | }
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| 59 | //! True if zone uses daylight savings adjustments
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| 60 | virtual bool has_dst() const
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| 61 | {
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| 62 | return (dst_calc_rules_); //if calc_rule is set the tz has dst
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| 63 | }
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| 64 | //! Local time that DST starts -- NADT if has_dst is false
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| 65 | virtual posix_time::ptime dst_local_start_time(gregorian::greg_year y) const
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| 66 | {
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| 67 | gregorian::date d(gregorian::not_a_date_time);
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| 68 | if (dst_calc_rules_) {
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| 69 | d = dst_calc_rules_->start_day(y);
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| 70 | }
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| 71 | return posix_time::ptime(d, dst_offsets_.dst_start_offset_);
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| 72 | }
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| 73 | //! Local time that DST ends -- NADT if has_dst is false
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| 74 | virtual posix_time::ptime dst_local_end_time(gregorian::greg_year y) const
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| 75 | {
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| 76 | gregorian::date d(gregorian::not_a_date_time);
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| 77 | if (dst_calc_rules_) {
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| 78 | d = dst_calc_rules_->end_day(y);
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| 79 | }
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| 80 | return posix_time::ptime(d, dst_offsets_.dst_end_offset_);
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| 81 | }
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| 82 | //! Base offset from UTC for zone (eg: -07:30:00)
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| 83 | virtual time_duration_type base_utc_offset() const
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| 84 | {
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| 85 | return base_utc_offset_;
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| 86 | }
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| 87 | //! Adjustment forward or back made while DST is in effect
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| 88 | virtual time_duration_type dst_offset() const
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| 89 | {
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| 90 | return dst_offsets_.dst_adjust_;
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| 91 | }
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| 92 | //! Returns a POSIX time_zone string for this object
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| 93 | virtual string_type to_posix_string() const
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| 94 | {
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| 95 | // std offset dst [offset],start[/time],end[/time] - w/o spaces
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| 96 | stringstream_type ss;
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| 97 | ss.fill('0');
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| 98 | boost::shared_ptr<dst_calc_rule> no_rules;
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| 99 | // std
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| 100 | ss << std_zone_abbrev();
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| 101 | // offset
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| 102 | if(base_utc_offset().is_negative()) {
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| 103 | // inverting the sign guarantees we get two digits
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| 104 | ss << '-' << std::setw(2) << base_utc_offset().invert_sign().hours();
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| 105 | }
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| 106 | else {
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| 107 | ss << '+' << std::setw(2) << base_utc_offset().hours();
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| 108 | }
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| 109 | if(base_utc_offset().minutes() != 0 || base_utc_offset().seconds() != 0) {
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| 110 | ss << ':' << std::setw(2) << base_utc_offset().minutes();
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| 111 | if(base_utc_offset().seconds() != 0) {
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| 112 | ss << ':' << std::setw(2) << base_utc_offset().seconds();
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| 113 | }
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| 114 | }
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| 115 | if(dst_calc_rules_ != no_rules) {
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| 116 | // dst
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| 117 | ss << dst_zone_abbrev();
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| 118 | // dst offset
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| 119 | if(dst_offset().is_negative()) {
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| 120 | // inverting the sign guarantees we get two digits
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| 121 | ss << '-' << std::setw(2) << dst_offset().invert_sign().hours();
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| 122 | }
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| 123 | else {
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| 124 | ss << '+' << std::setw(2) << dst_offset().hours();
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| 125 | }
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| 126 | if(dst_offset().minutes() != 0 || dst_offset().seconds() != 0) {
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| 127 | ss << ':' << std::setw(2) << dst_offset().minutes();
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| 128 | if(dst_offset().seconds() != 0) {
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| 129 | ss << ':' << std::setw(2) << dst_offset().seconds();
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| 130 | }
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| 131 | }
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| 132 | // start/time
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| 133 | ss << ',' << dst_calc_rules_->start_rule_as_string() << '/'
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| 134 | << std::setw(2) << dst_offsets_.dst_start_offset_.hours() << ':'
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| 135 | << std::setw(2) << dst_offsets_.dst_start_offset_.minutes();
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| 136 | if(dst_offsets_.dst_start_offset_.seconds() != 0) {
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| 137 | ss << ':' << std::setw(2) << dst_offsets_.dst_start_offset_.seconds();
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| 138 | }
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| 139 | // end/time
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| 140 | ss << ',' << dst_calc_rules_->end_rule_as_string() << '/'
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| 141 | << std::setw(2) << dst_offsets_.dst_end_offset_.hours() << ':'
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| 142 | << std::setw(2) << dst_offsets_.dst_end_offset_.minutes();
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| 143 | if(dst_offsets_.dst_end_offset_.seconds() != 0) {
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| 144 | ss << ':' << std::setw(2) << dst_offsets_.dst_end_offset_.seconds();
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| 145 | }
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| 146 | }
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| 147 |
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| 148 | return ss.str();
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| 149 | }
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| 150 | private:
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| 151 | time_zone_names zone_names_;
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| 152 | bool has_dst_;
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| 153 | time_duration_type base_utc_offset_;
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| 154 | dst_adjustment_offsets dst_offsets_;
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| 155 | boost::shared_ptr<dst_calc_rule> dst_calc_rules_;
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| 156 | };
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| 157 |
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| 158 | } }//namespace
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| 159 |
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| 160 |
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| 161 |
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| 162 | #endif
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