moved winix directories to winixd subdirectory

git-svn-id: svn://ttmath.org/publicrep/winix/trunk@1027 e52654a7-88a9-db11-a3e9-0013d4bc506e

winixd/core/timezone.h

@@ -0,0 +1,170 @@
+/*
+ * This file is a part of Winix
+ * and is distributed under the 2-Clause BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/* 
+ * Copyright (c) 2012-2014, Tomasz Sowa
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef headerfile_winix_core_timezone
+#define headerfile_winix_core_timezone
+
+#include <ctime>
+#include <map>
+#include "date/date.h"
+#include "space/space.h"
+
+
+
+namespace Winix
+{
+
+
+
+
+class TimeZone
+{
+public:
+
+
+	struct Dst
+	{
+		// true if a time zone has daylight saving time
+		bool has_dst;
+
+		// time zone daylight saving time (used if has_dst is true)
+		// the 'year' field is the same in 'start' and 'end'
+		// start and end are represented in UTC time
+		PT::Date start, end;
+
+		// time zone daylight saving time offset
+		// used when has_dst is true and the date is whithin start and end
+		// this offset should be added to time zone offset
+		time_t offset;
+
+		Dst();
+		void Clear();
+
+		// checking whether specified 'date' is in the range of <start, end>
+		// the year field in date, start and end is ignored
+		// has_dst must be true
+		bool IsDstUsed(const PT::Date & date) const;
+
+
+	private:
+
+		// Compare returns zero if date1 and date2 are equal
+		// return value less than zero if date1 is lower than date2
+		// and a value greater than zero if date1 is greater than date2
+		// the year field is ignored
+		int Compare(const PT::Date & date1, const PT::Date & date2) const;
+
+	};
+
+
+	TimeZone();
+
+
+	/*
+	*/
+	void Clear();
+
+
+	/*
+		reading zime zone values from Space struct (tz_id is skipped)
+		the space struct should have:
+		  "tz_offset" (long)
+		  "tz_has_dst" (bool)
+		if tz_has_dst is true then also:
+		  "tz_dst_start"  date in the following format: MM:DD HH[:MM[:SS]]
+		  "tz_dst_end"    the same as above
+		  "tz_dst_offset" (long)
+	*/
+	bool SetTz(PT::Space & space);
+
+
+	/*
+		 converting from UTC to local time
+	*/
+	time_t   CalcLocalOffset(const PT::Date & utc_date);
+	time_t   ToLocal(time_t utc_time);
+	PT::Date ToLocal(const PT::Date & utc_date);
+
+
+	/*
+		 converting from local time to UTC
+	*/
+	time_t   CalcUTCOffset(const PT::Date & local_date);
+	time_t   ToUTC(time_t local_time);
+	PT::Date ToUTC(const PT::Date & local_date);
+
+	// return a Dst structure for the specified year
+	// or null if it not exists
+	// this method can return a Dst structure for earlier year than 'year'
+	// if 'year' doesn't exist
+	Dst * FindDst(int year);
+
+
+
+	// a time zone name
+	// this is a key to locale
+	std::wstring name;
+
+	// each locale has its own identifier
+	size_t id;
+
+	// time zone offset (in seconds)
+	time_t offset;
+
+	// daylight saving time map
+	// year -> Dst
+	// if there is not a specified year we are taking the lower year, e.g.
+	// if we are looking for 2010 and there is no such a year then we take 2009
+	// (or 2008 if 2009 not exists etc)
+	typedef std::map<int, Dst> DstMap;
+	DstMap dst_map;
+
+
+
+private:
+
+	time_t ParseStrOffset(const wchar_t * str);
+	time_t GetOffset(PT::Space & space);
+	bool   SetTzDst(PT::Space & year);
+
+};
+
+
+
+
+} // namespace Winix
+
+
+
+#endif