author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 15 Sep 2010 14:02:55 +0300 | |
branch | RCL_3 |
changeset 64 | c44f36bb61a3 |
parent 33 | 6896b031c3e1 |
child 75 | 254b651f304e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: This is a project specific include file for building the |
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* clock related functions as part of libc library. |
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* |
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*/ |
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|
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|
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#include <e32base.h> |
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#include <e32cons.h> |
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#include <tz.h> |
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#include <tzconverter.h> |
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#include "tzlocalizer.h" |
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#include "tzlocalizationdatatypes.h" |
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#include "vtzrules.h" |
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#include "utf.h" |
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#include "timefuncs.h" |
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#include "lposix.h" |
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#include "sysif.h" |
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#include "libc_wsd_defs.h" |
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// This represents the base EpochTime in microseconds, |
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// which happens to be January 1, 1970 (midnight UTC/GMT), |
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// not counting leap seconds. This effectively represents |
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// the number of microseconds in 1970 years. |
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static const TInt64 KEpochTime = 62168256000000000; |
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#ifndef EMULATOR |
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struct tm cachetm; |
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time_t prevchange; |
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time_t nextchange; |
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#else //EMULATOR |
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GET_GLOBAL_VAR_FROM_TLS(cachetm, struct tm) |
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#define cachetm (*GET_WSD_VAR_NAME(cachetm, g)()) |
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GET_GLOBAL_VAR_FROM_TLS(prevchange, time_t) |
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#define prevchange (*GET_WSD_VAR_NAME(prevchange, g)()) |
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GET_GLOBAL_VAR_FROM_TLS(nextchange, time_t) |
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#define nextchange (*GET_WSD_VAR_NAME(nextchange, g)()) |
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#endif //EMULATOR |
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#if !defined(__SERIES60_30__) |
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TTzTimeReference FindChangeBracket(TTime& aTime ,TTime& aUTime, CVTzActualisedRules& aRule,TBool& aDstOn) |
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{ |
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TInt cnt = aRule.Count(); |
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TInt lowestOffset = -1, curOffset=-1; |
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TBool isInit = EFalse; |
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TTime CurTime(aTime); |
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TTime Previous(-1), Next(-1); |
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TTzTimeReference ref(ETzWallTimeReference); |
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//datetime to be created from the UTC time. |
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TDateTime dateTime = aUTime.DateTime(); |
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// Initially set aDstOn to False |
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aDstOn = EFalse; |
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// Loop to find the lowest time offset applicable in the year. |
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for(TInt idx=0; idx<cnt; idx++) |
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{ |
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TVTzActualisedRule& Actual = aRule[idx]; |
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if (Actual.iTimeOfChange.DateTime().Year() == dateTime.Year()) |
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{ |
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if (!isInit) |
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{ |
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lowestOffset = Actual.iNewOffset; |
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isInit = ETrue; |
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} |
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if (isInit && Actual.iNewOffset < lowestOffset) |
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{ |
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lowestOffset = Actual.iNewOffset; |
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} |
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} |
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} |
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// Loop to find the current offset, previous time of change and the next time of change. |
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for(TInt idx=0; idx<cnt; idx++) |
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{ |
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TVTzActualisedRule& Actual = aRule[idx]; |
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if(Actual.iTimeReference == ETzUtcTimeReference && CurTime != aUTime) |
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{ |
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CurTime = aUTime; |
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ref = ETzUtcTimeReference; |
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} |
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// Rules are arranged in increasing order of iTimeofChange |
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if(CurTime >= Actual.iTimeOfChange) |
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{ |
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Previous = Actual.iTimeOfChange; |
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curOffset = Actual.iNewOffset; |
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} |
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106 |
else |
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107 |
{ |
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Next = Actual.iTimeOfChange; |
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break; |
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110 |
} |
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111 |
} |
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112 |
/* |
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* If the Next and Previous were not set due to some reason, |
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* Set them to one year after and one year before the time passed. |
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*/ |
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if(Next == -1) |
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117 |
{ |
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118 |
/* Next year */ |
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Next = CurTime + (TTimeIntervalSeconds)(365*86400); |
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120 |
} |
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if (Previous == -1) |
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122 |
{ |
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123 |
/* Prev Year */ |
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Previous = CurTime - (TTimeIntervalSeconds)(365*86400); |
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} |
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aTime = Previous; |
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aUTime = Next; |
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if(lowestOffset != -1 && curOffset > lowestOffset) |
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129 |
{ |
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aDstOn = ETrue; |
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} |
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return ref; |
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} |
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#endif |
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135 |
|
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void UpdateDstAndTznameL(RTz &aServer,CTzId& aId,struct tm* aTmStruct, TTime aTime, TTime aUTime, TDateTime aDate, TTzTimeReference aReference) |
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137 |
{ |
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#if !defined(__SERIES60_30__) |
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CTzRules* zonerules = aServer.GetTimeZoneRulesL(aId, aTime, aTime, aReference); |
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CleanupStack::PushL(zonerules); |
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CVTzActualisedRules* actual = CVTzActualisedRules::NewL(aDate.Year()-1, aDate.Year()+1); |
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CleanupStack::PushL(actual); |
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zonerules->GetActualisedRulesL(*actual); |
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144 |
TTime PrevTime(aTime), NextTime(aUTime); |
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TBool IsDstOn; |
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/* Send local TTimes */ |
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if(FindChangeBracket(PrevTime, NextTime, *actual, IsDstOn)== ETzWallTimeReference) |
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148 |
{ |
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aServer.ConvertToUniversalTime(PrevTime,aId); |
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aServer.ConvertToUniversalTime(NextTime,aId); |
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} |
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prevchange = (PrevTime.Int64() - KEpochTime)/1000000; |
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nextchange = (NextTime.Int64() - KEpochTime)/1000000; |
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154 |
|
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aTmStruct->tm_isdst = IsDstOn; |
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CleanupStack::PopAndDestroy(actual); |
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CleanupStack::PopAndDestroy(zonerules); |
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#else // __SERIES60_30__ defined |
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aServer; |
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aTime; |
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aUTime; |
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aDate; |
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aReference; |
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#endif |
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/* //This part has been commented out because of performance issue. Also this requires capability. |
0
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if(RProcess().HasCapability(ECapabilityReadUserData,ECapabilityWriteUserData,NULL)) |
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167 |
{ |
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// tm_zone updated only in this case. Otherwise always has UTC. |
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CTzLocalizer *localizer = CTzLocalizer::NewL(); |
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CleanupStack::PushL(localizer); |
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CTzLocalizedTimeZone* timezone = localizer->GetLocalizedTimeZoneL(aId.TimeZoneNumericID()); |
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CleanupStack::PushL(timezone); |
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TPtrC zoneNameDesc; |
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if (aTmStruct->tm_isdst) |
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175 |
{ |
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zoneNameDesc.Set(timezone->ShortDaylightName()); |
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177 |
} |
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178 |
else |
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179 |
{ |
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zoneNameDesc.Set(timezone->ShortStandardName()); |
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181 |
} |
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//TODO: Value should not be hardcoded here. Get it from the struct state again. |
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TPtr8 ptr((unsigned char*)tzname[0],zoneNameDesc.Size()); |
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CnvUtfConverter::ConvertFromUnicodeToUtf8(ptr,zoneNameDesc); |
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CleanupStack::PopAndDestroy(timezone); |
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CleanupStack::PopAndDestroy(localizer); |
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187 |
} |
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188 |
|
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aTmStruct->tm_zone = tzname[0]; */ |
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190 |
|
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aTmStruct->tm_zone = "WILDABBR"; |
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192 |
} |
0
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193 |
|
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194 |
void ConvertUtcToLocalTimeL(const time_t* aUTCTime, struct tm* const atmStruct) |
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195 |
{ |
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if(!aUTCTime) |
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197 |
{ |
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User::Leave(KErrArgument); |
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199 |
} |
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TTime time(KEpochTime + (*aUTCTime) * (TInt64)1000000); |
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201 |
TTime Utime(time); |
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202 |
|
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// Cache Logic. |
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204 |
TTimeIntervalSeconds UtcOffset = User::UTCOffset(); |
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205 |
if( cachetm.tm_gmtoff == UtcOffset.Int() && prevchange <= *aUTCTime && *aUTCTime<= nextchange) |
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{ |
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time += UtcOffset; // Convert to local time. |
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TDateTime tdt = time.DateTime(); |
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cachetm.tm_sec = tdt.Second(); |
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cachetm.tm_min = tdt.Minute(); |
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cachetm.tm_hour = tdt.Hour(); |
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cachetm.tm_mday = tdt.Day() + 1; |
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cachetm.tm_mon = tdt.Month(); |
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cachetm.tm_year = tdt.Year() - 1900; // This is as per the tm structure format. |
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cachetm.tm_wday = (time.DayNoInWeek()+1)%7; // Note: first day of the week is considered as Monday, so adding +1. |
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cachetm.tm_yday = time.DayNoInYear()-1; // Note: first day of the year is considered as 1, so |
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*atmStruct = cachetm; |
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return; |
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} |
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220 |
|
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TDateTime tdt = time.DateTime(); |
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222 |
|
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//enable the cache |
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TInt status = KErrNone; |
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RTz& rtzServer = Backend()->TZServer(status); |
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if(status != KErrNone) |
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User::Leave(status); |
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228 |
|
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CTzConverter* ctzConverter = CTzConverter::NewL(rtzServer); |
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230 |
|
0
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CleanupStack::PushL(ctzConverter); |
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if(ctzConverter->ConvertToLocalTime(time) == KErrNone) |
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233 |
{ |
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tdt = time.DateTime(); |
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atmStruct->tm_sec = tdt.Second(); |
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atmStruct->tm_min = tdt.Minute(); |
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atmStruct->tm_hour = tdt.Hour(); |
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atmStruct->tm_mday = tdt.Day() + 1; |
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atmStruct->tm_mon = tdt.Month(); |
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atmStruct->tm_year = tdt.Year() - 1900; // This is as per the tm structure format. |
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atmStruct->tm_wday = (time.DayNoInWeek()+1)%7; // Note: first day of the week is considered as Monday, so adding +1. |
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atmStruct->tm_yday = time.DayNoInYear()-1; // Note: first day of the year is considered as 1, so |
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243 |
|
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atmStruct->tm_gmtoff = (time.Int64() - Utime.Int64())/1000000; |
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245 |
|
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TInt timeZoneId = ctzConverter->CurrentTzId(); |
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CTzId* zoneid = CTzId::NewL((TUint)timeZoneId); |
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CleanupStack::PushL(zoneid); |
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249 |
|
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atmStruct->tm_isdst = -1; |
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UpdateDstAndTznameL(rtzServer, *zoneid, atmStruct, time, Utime, tdt, ETzWallTimeReference); |
0
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CleanupStack::PopAndDestroy(zoneid); |
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} |
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254 |
|
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255 |
|
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CleanupStack::PopAndDestroy(1); |
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cachetm = *atmStruct; |
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} |
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259 |
|
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void ConvertLocalToUtcTimeL(time_t* aUTCTime, struct tm* const aTmStruct) |
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261 |
{ |
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if(!aTmStruct || aTmStruct->tm_year < 0 || aTmStruct->tm_mon < 0 || aTmStruct->tm_mday < 1 || aTmStruct->tm_hour < 0 || aTmStruct->tm_min < 0 || aTmStruct->tm_sec < 0 ) |
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|
263 |
{ |
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|
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User::Leave(KErrArgument); |
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265 |
} |
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|
266 |
|
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TDateTime tdt(aTmStruct->tm_year + 1900, (TMonth)aTmStruct->tm_mon, aTmStruct->tm_mday-1, |
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aTmStruct->tm_hour, aTmStruct->tm_min, aTmStruct->tm_sec, 0); |
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|
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TTime time(tdt); |
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|
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TTime oldTime(time); |
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|
271 |
|
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// Cache Logic |
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TTimeIntervalSeconds UtcOffset = User::UTCOffset(); |
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|
274 |
if(cachetm.tm_gmtoff == UtcOffset.Int() && cachetm.tm_year == aTmStruct->tm_year && cachetm.tm_mon == aTmStruct->tm_mon && cachetm.tm_mday == aTmStruct->tm_mday) |
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275 |
{ |
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|
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aTmStruct->tm_gmtoff = cachetm.tm_gmtoff; |
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|
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aTmStruct->tm_isdst = cachetm.tm_isdst; |
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|
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aTmStruct->tm_zone = cachetm.tm_zone; |
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|
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aTmStruct->tm_wday = (time.DayNoInWeek()+1)%7; // Note: first day of the week is considered as Monday, so adding +1. |
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aTmStruct->tm_yday = time.DayNoInYear()-1; // Note: first day of the year is considered as 1, so |
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time -= UtcOffset; // Converting to UTC time. |
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TInt64 utcTimeMicroSec = time.Int64(); |
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|
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TInt64 epochRefTime = utcTimeMicroSec - KEpochTime; |
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(*aUTCTime) = (TInt) (epochRefTime / 1000000); |
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return; |
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|
286 |
} |
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|
287 |
|
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|
288 |
TInt status = KErrNone; |
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|
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RTz& rtzServer = Backend()->TZServer(status); |
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290 |
if(status != KErrNone) |
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291 |
User::Leave(status); |
0
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|
292 |
|
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|
293 |
CTzConverter* ctzConverter = CTzConverter::NewL(rtzServer); |
0
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CleanupStack::PushL(ctzConverter); |
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|
295 |
/* Following fields are updated if successful: |
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* tm_wday |
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* tm_yday |
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* tm_isdst |
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* tm_gmtoffset |
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* tm_zone ( Conditional on capabilities available) |
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301 |
*/ |
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302 |
if(ctzConverter->ConvertToUniversalTime(time) == KErrNone) |
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303 |
{ |
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//conversion successful |
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TInt64 utcTimeMicroSec = time.Int64(); |
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TInt64 epochRefTime = utcTimeMicroSec - KEpochTime; |
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(*aUTCTime) = (TInt) (epochRefTime / 1000000); |
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aTmStruct->tm_wday = (oldTime.DayNoInWeek()+1)%7; // Note: first day of the week is considered as Monday, so adding +1. |
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aTmStruct->tm_yday = oldTime.DayNoInYear()-1; // Note: first day of the year is considered as 1, so |
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aTmStruct->tm_gmtoff = (oldTime.Int64() - utcTimeMicroSec)/1000000; |
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|
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TInt timeZoneId = ctzConverter->CurrentTzId(); |
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CTzId* zoneid = CTzId::NewL((TUint)timeZoneId); |
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CleanupStack::PushL(zoneid); |
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315 |
|
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aTmStruct->tm_isdst = -1; |
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UpdateDstAndTznameL(rtzServer, *zoneid, aTmStruct, oldTime, time, tdt, ETzUtcTimeReference); |
0
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CleanupStack::PopAndDestroy(zoneid); |
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} |
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cachetm = *aTmStruct; |
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CleanupStack::PopAndDestroy(1); |
0
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} |
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323 |
|
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// converts a UTC time to local time, or, local time to UTC time. |
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TInt ConvertTime(const TInt atimeConverFlg, time_t *aUTCTime, struct tm *const atmStruct) |
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{ |
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TInt err = 0; |
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|
0
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CActiveScheduler* oldAs = CActiveScheduler::Current(); |
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RHeap* oldHeap = User::SwitchHeap(Backend()->Heap()); |
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CActiveScheduler* newAs = new CActiveScheduler(); |
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User::SwitchHeap(oldHeap); |
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if(!newAs) |
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{ |
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errno = ENOMEM; |
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return ENOMEM; |
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} |
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if(oldAs) |
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339 |
{ |
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(void)CActiveScheduler::Replace(newAs); |
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} |
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else |
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343 |
{ |
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CActiveScheduler::Install(newAs); |
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} |
3
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346 |
|
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oldHeap = User::SwitchHeap(Backend()->Heap()); |
0
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// Cleanup stack needed |
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CTrapCleanup* cleanup=CTrapCleanup::New(); |
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350 |
|
0
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if (cleanup) |
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352 |
{ |
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if(EUtcToLocal == atimeConverFlg) |
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354 |
{ |
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TRAP(err, ConvertUtcToLocalTimeL(aUTCTime, atmStruct)); |
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356 |
} |
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else if(ELocalToUtc == atimeConverFlg) |
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358 |
{ |
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359 |
TRAP(err, ConvertLocalToUtcTimeL(aUTCTime, atmStruct)); |
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360 |
} |
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361 |
delete cleanup; |
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362 |
} |
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363 |
else |
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364 |
{ |
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365 |
err = ENOMEM; |
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366 |
} |
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367 |
if(oldAs) |
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368 |
{ |
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369 |
(void)CActiveScheduler::Replace(oldAs); |
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370 |
} |
3
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|
371 |
|
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|
372 |
|
0
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373 |
delete newAs; |
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374 |
User::SwitchHeap(oldHeap); |
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375 |
return MapError(err,errno); |
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376 |
} |
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|
377 |