整理

include/boost/date_time/local_time/custom_time_zone.hpp

@@ -0,0 +1,168 @@
+#ifndef LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__
+#define LOCAL_TIME_CUSTOM_TIME_ZONE_HPP__
+
+/* Copyright (c) 2003-2005 CrystalClear Software, Inc.
+ * Subject to the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ * Author: Jeff Garland, Bart Garst
+ * $Date$
+ */
+
+#include "boost/date_time/time_zone_base.hpp"
+#include "boost/date_time/time_zone_names.hpp"
+#include "boost/date_time/posix_time/posix_time.hpp"
+#include "boost/date_time/local_time/dst_transition_day_rules.hpp"
+#include "boost/date_time/string_convert.hpp"
+//#include "boost/date_time/special_defs.hpp"
+#include "boost/shared_ptr.hpp"
+
+namespace boost {
+namespace local_time {
+
+  //typedef boost::date_time::time_zone_names time_zone_names;
+  typedef boost::date_time::dst_adjustment_offsets<boost::posix_time::time_duration> dst_adjustment_offsets;
+  //typedef boost::date_time::time_zone_base<boost::posix_time::ptime> time_zone;
+  typedef boost::shared_ptr<dst_calc_rule> dst_calc_rule_ptr;
+
+  //! A real time zone
+  template<class CharT>
+  class custom_time_zone_base : public date_time::time_zone_base<posix_time::ptime,CharT> {
+  public:
+    typedef boost::posix_time::time_duration time_duration_type;
+    typedef date_time::time_zone_base<posix_time::ptime,CharT> base_type;
+    typedef typename base_type::string_type string_type;
+    typedef typename base_type::stringstream_type stringstream_type;
+    typedef date_time::time_zone_names_base<CharT> time_zone_names;
+    typedef CharT char_type;
+
+    custom_time_zone_base(const time_zone_names& zone_names,
+                     const time_duration_type& utc_offset,
+                     const dst_adjustment_offsets& dst_shift,
+                     boost::shared_ptr<dst_calc_rule> calc_rule) :
+      zone_names_(zone_names),
+      base_utc_offset_(utc_offset),
+      dst_offsets_(dst_shift),
+      dst_calc_rules_(calc_rule)
+    {}
+    virtual ~custom_time_zone_base() {}
+    virtual string_type dst_zone_abbrev() const
+    {
+      return zone_names_.dst_zone_abbrev();
+    }
+    virtual string_type std_zone_abbrev() const
+    {
+      return zone_names_.std_zone_abbrev();
+    }
+    virtual string_type dst_zone_name() const
+    {
+      return zone_names_.dst_zone_name();
+    }
+    virtual string_type std_zone_name() const
+    {
+      return zone_names_.std_zone_name();
+    }
+    //! True if zone uses daylight savings adjustments
+    virtual bool has_dst() const
+    {
+      return (bool) dst_calc_rules_; //if calc_rule is set the tz has dst
+    }
+    //! Local time that DST starts -- NADT if has_dst is false
+    virtual posix_time::ptime dst_local_start_time(gregorian::greg_year y) const
+    {
+      gregorian::date d(gregorian::not_a_date_time);
+      if (dst_calc_rules_) {
+        d = dst_calc_rules_->start_day(y);
+      }
+      return posix_time::ptime(d, dst_offsets_.dst_start_offset_);
+    }
+    //! Local time that DST ends -- NADT if has_dst is false
+    virtual posix_time::ptime dst_local_end_time(gregorian::greg_year y) const
+    {
+      gregorian::date d(gregorian::not_a_date_time);
+      if (dst_calc_rules_) {
+        d = dst_calc_rules_->end_day(y);
+      }
+      return posix_time::ptime(d, dst_offsets_.dst_end_offset_);
+    }
+    //! Base offset from UTC for zone (eg: -07:30:00)
+    virtual time_duration_type base_utc_offset() const
+    {
+      return base_utc_offset_;
+    }
+    //! Adjustment forward or back made while DST is in effect
+    virtual time_duration_type dst_offset() const
+    {
+      return dst_offsets_.dst_adjust_;
+    }
+    //! Returns a POSIX time_zone string for this object
+    virtual string_type to_posix_string() const
+    {
+      // std offset dst [offset],start[/time],end[/time] - w/o spaces
+      stringstream_type ss;
+      ss.fill('0');
+      boost::shared_ptr<dst_calc_rule> no_rules;
+      // std
+      ss << std_zone_abbrev();
+      // offset
+      if(base_utc_offset().is_negative()) {
+        // inverting the sign guarantees we get two digits
+        ss << '-' << std::setw(2) << base_utc_offset().invert_sign().hours();
+      }
+      else {
+        ss << '+' << std::setw(2) << base_utc_offset().hours();
+      }
+      if(base_utc_offset().minutes() != 0 || base_utc_offset().seconds() != 0) {
+        ss << ':' << std::setw(2) << base_utc_offset().minutes();
+        if(base_utc_offset().seconds() != 0) {
+          ss << ':' << std::setw(2) << base_utc_offset().seconds();
+        }
+      }
+      if(dst_calc_rules_ != no_rules) {
+        // dst
+        ss << dst_zone_abbrev();
+        // dst offset
+        if(dst_offset().is_negative()) {
+          // inverting the sign guarantees we get two digits
+          ss << '-' << std::setw(2) << dst_offset().invert_sign().hours();
+        }
+        else {
+          ss << '+' << std::setw(2) << dst_offset().hours();
+        }
+        if(dst_offset().minutes() != 0 || dst_offset().seconds() != 0) {
+          ss << ':' << std::setw(2) << dst_offset().minutes();
+          if(dst_offset().seconds() != 0) {
+            ss << ':' << std::setw(2) << dst_offset().seconds();
+          }
+        }
+        // start/time
+        ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->start_rule_as_string()) << '/'
+           << std::setw(2) << dst_offsets_.dst_start_offset_.hours() << ':'
+           << std::setw(2) << dst_offsets_.dst_start_offset_.minutes();
+        if(dst_offsets_.dst_start_offset_.seconds() != 0) {
+          ss << ':' << std::setw(2) << dst_offsets_.dst_start_offset_.seconds();
+        }
+        // end/time
+        ss << ',' << date_time::convert_string_type<char, char_type>(dst_calc_rules_->end_rule_as_string()) << '/'
+           << std::setw(2) << dst_offsets_.dst_end_offset_.hours() << ':'
+           << std::setw(2) << dst_offsets_.dst_end_offset_.minutes();
+        if(dst_offsets_.dst_end_offset_.seconds() != 0) {
+          ss << ':' << std::setw(2) << dst_offsets_.dst_end_offset_.seconds();
+        }
+      }
+
+      return ss.str();
+    }
+  private:
+    time_zone_names zone_names_;
+    time_duration_type base_utc_offset_;
+    dst_adjustment_offsets dst_offsets_;
+    boost::shared_ptr<dst_calc_rule> dst_calc_rules_;
+  };
+
+  typedef custom_time_zone_base<char> custom_time_zone;
+
+} }//namespace
+
+
+
+#endif