/*

 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

 #include "util.h"

 #include <centralrepository.h>

 _LIT(KDaylightSavingsMinFormat, "%F%Y0224:");

 _LIT(KDaylightSavingsMaxFormat, "%F%Y0924:");

 void Util::SetAppropriateTimezoneL()

 	{

 	TUid repUid = {0x1020e4d3};

 	CRepository* rep = CRepository::NewLC(repUid);

 	// Set the date format to European

 	User::LeaveIfError(rep->StartTransaction(CRepository::EConcurrentReadWriteTransaction));

 	User::LeaveIfError(rep->Set(101, EDateEuropean)); // 101 is the date format reg entry

 	TUint32 keys(0);

 	User::LeaveIfError(rep->CommitTransaction(keys));

 	CleanupStack::PopAndDestroy(rep);

 	TExtendedLocale locale;

 	locale.LoadSystemSettings();

 	locale.GetLocale()->SetDateFormat(EDateEuropean);

 	User::LeaveIfError(locale.SaveSystemSettings());

 	}

 TBool Util::DaylightSavingsAppliesL(const TTime& utc)

 	{

 	// This algorithm needs the first day of the week to be monday

 	TDay oldStart;

 	TLocale set;

 	oldStart = set.StartOfWeek();

 	set.SetStartOfWeek(EMonday);

 	set.Set();

 	TBuf<9> min;

 	TBuf<9> max;

 	utc.FormatL(min, KDaylightSavingsMinFormat);

 	utc.FormatL(max, KDaylightSavingsMaxFormat);

 	// Get times representing the first/last possible day of this 

 	// year that daylight savings time change could change on

 	TTime timeMin;

 	User::LeaveIfError(timeMin.Set(min));

 	TTime timeMax;

 	User::LeaveIfError(timeMax.Set(max));

 	// Find the last sunday in the respective months

 	TTimeIntervalDays addMin(6 - timeMin.DayNoInWeek());

 	TTimeIntervalDays addMax(6 - timeMax.DayNoInWeek());

 	timeMin += addMin;

 	timeMax += addMax;

 	// The change happens at 1AM.

 	TTimeIntervalHours hour(1);

 	timeMin += hour;

 	timeMax += hour;

 	// Now we know which day the change occurs on.

 	// Compare it to what the UTC is.

 	TBool result = ((timeMin <= utc) && (timeMax > utc));

 	// reset the first week day

 	set.SetStartOfWeek(oldStart);

 	set.Set();

 	return result;

 	}