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// Copyright (c) 1998-2009 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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#include "UT_STD.H"
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EXPORT_C TStreamId TSwizzleCBase::AsId() const
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/** Gets the streamid of the represented object.
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This swizzle must currently represent the object as a stream id, otherwise
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the function raises a STORE-Store 3 panic.
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@return The stream id of the represented object */
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{
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__ASSERT_ALWAYS(IsId(),Panic(EStoreSwizzleBadId));
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return iPtr==NULL?KNullStreamId:TStreamId((TUint32)iPtr>>1); // implementation dependency
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}
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EXPORT_C void TSwizzleCBase::InternalizeL(RReadStream& aStream)
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/** Internalises a stream id from the read stream, constructs a swizzle from this
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stream id and copies the swizzle to this swizzle.
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The presence of this function means that the standard templated operator>>()
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can be used to internalise objects of this class.
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@param aStream Stream from which the stream id should be internalised */
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{
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TStreamId id;
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aStream>>id;
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*this=TSwizzleCBase(id);
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}
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EXPORT_C TSwizzleCBase::TSwizzleCBase(TStreamId anId)
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//
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// Construct from a stream id.
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//
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: iPtr(anId==KNullStreamId?NULL:(TAny*)((anId.Value()<<1)|0x1))
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{}
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EXPORT_C void TSwizzleCBase::DoExternalizeL(RWriteStream& aStream,TExternalizer<TAny> anExter) const
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//
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// Write this swizzle to aStream as an out-of-stream reference.
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//
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{
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aStream<<TStreamRef(iPtr,(IsPtr()?anExter.Function():NULL));
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}
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EXPORT_C TBool TSwizzleCBase::IsPtrRep(const TAny* aPtr)
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//
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// Test whether aPtr is a valid representation for a pointer.
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//
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{
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return !((TUint32)aPtr&0x3); // implementation dependency
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}
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EXPORT_C TBool TSwizzleCBase::IsIdRep(const TAny* aPtr)
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//
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// Test whether aPtr is a valid representation for a stream id.
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//
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{
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return aPtr==NULL||(TUint32)aPtr&0x1; // implementation dependency
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}
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EXPORT_C void TSwizzleCBase::__DbgChkPtr(const TAny* aPtr)
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//
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// Check for invalid pointers.
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//
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{
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__ASSERT_ALWAYS(IsPtrRep(aPtr),Panic(EStoreSwizzleBadPtr));
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}
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EXPORT_C void TSwizzleCBase::__DbgChkRef(TStreamRef aRef)
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//
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// Check for an invalid out-of-stream reference.
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//
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{
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__ASSERT_ALWAYS((IsPtrRep(aRef.Ptr())&&aRef.Function()!=NULL)||(IsIdRep(aRef.Ptr())&&aRef.Function()==NULL),Panic(EStoreSwizzleBadReference));
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}
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