commsfwsupport/commselements/NetMeta/src/MetaVirtCtor.cpp
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201025_01
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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:
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//
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/**
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 @file
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 @internalTechnology
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*/
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#include <elements/metavirtctor.h>
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#ifdef _DEBUG
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// Panic category for "absolutely impossible!" vanilla ASSERT()-type panics from this module
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// (if it could happen through user error then you should give it an explicit, documented, category + code)
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_LIT(KSpecAssert_ElemNetMetaMtVrt, "ElemNetMetaMtVrt");
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#endif
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#if !defined(VERIFY_RESULT) && defined(_DEBUG)
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#define VERIFY_RESULT(c,d) __ASSERT_DEBUG(c==d, User::Panic(KSpecAssert_ElemNetMetaMtVrt, 1))
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#else
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#define VERIFY_RESULT(c,d) ((void)(c))
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#endif
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using namespace Meta;
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_LIT(KMetaDataNetCtorPanic, "MetaDataNetCtor");
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enum TMetaDataNetCtorPanic
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	{
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	EConstructedObjectTooBig = 0
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	};
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/** Thin helper to in-place construction in a descriptor (eg TBuf8)
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*/
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EXPORT_C TAny* SMetaDataNetCtor::operator new(TUint aSize, TDes8& aBuff)
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	{
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	__ASSERT_ALWAYS(aSize <= static_cast<TUint>(aBuff.MaxSize()), User::Panic(KMetaDataNetCtorPanic, EConstructedObjectTooBig));
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	return const_cast<TUint8*>(aBuff.Ptr());
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	}
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EXPORT_C SMetaDataNetCtor* CMetaDataVirtualCtorInPlace::New(const Meta::STypeId& aType, TDes8& aBuff) const
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    {
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    return static_cast<SMetaDataNetCtor*>(VC::CVirtualCtorInPlace::New(aType, aBuff));
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    }
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EXPORT_C SMetaDataNetCtor* CMetaDataVirtualCtorInPlace::New(const Meta::STypeId& aType, TPtrC8& aParams, TDes8& aBuff) const
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	{
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	SMetaDataNetCtor* self = CMetaDataVirtualCtorInPlace::New(aType,aBuff);
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	if (self)
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		{
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		VERIFY_RESULT(self->Load(aParams), KErrNone);
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		}
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	return self;
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	}
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EXPORT_C SMetaDataNetCtor* CMetaDataVirtualCtorInPlace::New(TPtrC8& aParams, TDes8& aBuff) const
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    {
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   	__ASSERT_DEBUG(aParams.Length() >= sizeof(Meta::STypeId), User::Panic(KSpecAssert_ElemNetMetaMtVrt, 2));
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	const Meta::STypeId* typeId = reinterpret_cast<const Meta::STypeId*>(aParams.Ptr());
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	if (typeId==NULL)
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		{
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		return NULL;
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		}
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	typeId->Check(aParams); //Strip the buffer
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	return New(*typeId, aParams, aBuff);
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    }
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