timezone_win32.cpp

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//
// Timezone_WIN32.cpp
//
// $Id: //poco/Main/Foundation/src/Timezone_WIN32.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// 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.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// 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 OWNER 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
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// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/Timezone.h"
#include <windows.h>
#include <time.h>


Foundation_BEGIN


int Timezone::utcOffset()
{
	TIME_ZONE_INFORMATION tzInfo;
	DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
	return -tzInfo.Bias*60;
}

	
int Timezone::dst()
{
	TIME_ZONE_INFORMATION tzInfo;
	DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
	return dstFlag == TIME_ZONE_ID_DAYLIGHT ? -tzInfo.DaylightBias*60 : 0;
}


bool Timezone::isDst(const Timestamp& timestamp)
{
	time_t time = timestamp.epochTime();
	struct tm* tms = localtime(&time);
	return tms->tm_isdst > 0;
}

	
std::string Timezone::name()
{
	TIME_ZONE_INFORMATION tzInfo;
	DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
	WCHAR* ptr = dstFlag == TIME_ZONE_ID_DAYLIGHT ? tzInfo.DaylightName : tzInfo.StandardName;
	std::string result;
	while (*ptr) result += (char) *ptr++;
	return result;
}

	
std::string Timezone::standardName()
{
	TIME_ZONE_INFORMATION tzInfo;
	DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
	WCHAR* ptr = tzInfo.StandardName;
	std::string result;
	while (*ptr) result += (char) *ptr++;
	return result;
}

	
std::string Timezone::dstName()
{
	TIME_ZONE_INFORMATION tzInfo;
	DWORD dstFlag = GetTimeZoneInformation(&tzInfo);
	WCHAR* ptr = tzInfo.DaylightName;
	std::string result;
	while (*ptr) result += (char) *ptr++;
	return result;
}


Foundation_END