1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
2 // All rights reserved.
3 // This component and the accompanying materials are made available
4 // under the terms of "Eclipse Public License v1.0"
5 // which accompanies this distribution, and is available
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
8 // Initial Contributors:
9 // Nokia Corporation - initial contribution.
18 EXPORT_C TStreamId TSwizzleCBase::AsId() const
19 /** Gets the streamid of the represented object.
21 This swizzle must currently represent the object as a stream id, otherwise
22 the function raises a STORE-Store 3 panic.
24 @return The stream id of the represented object */
26 __ASSERT_ALWAYS(IsId(),Panic(EStoreSwizzleBadId));
27 return iPtr==NULL?KNullStreamId:TStreamId((TUint32)iPtr>>1); // implementation dependency
30 EXPORT_C void TSwizzleCBase::InternalizeL(RReadStream& aStream)
31 /** Internalises a stream id from the read stream, constructs a swizzle from this
32 stream id and copies the swizzle to this swizzle.
34 The presence of this function means that the standard templated operator>>()
35 can be used to internalise objects of this class.
37 @param aStream Stream from which the stream id should be internalised */
41 *this=TSwizzleCBase(id);
44 EXPORT_C TSwizzleCBase::TSwizzleCBase(TStreamId anId)
46 // Construct from a stream id.
48 : iPtr(anId==KNullStreamId?NULL:(TAny*)((anId.Value()<<1)|0x1))
51 EXPORT_C void TSwizzleCBase::DoExternalizeL(RWriteStream& aStream,TExternalizer<TAny> anExter) const
53 // Write this swizzle to aStream as an out-of-stream reference.
56 aStream<<TStreamRef(iPtr,(IsPtr()?anExter.Function():NULL));
59 EXPORT_C TBool TSwizzleCBase::IsPtrRep(const TAny* aPtr)
61 // Test whether aPtr is a valid representation for a pointer.
64 return !((TUint32)aPtr&0x3); // implementation dependency
67 EXPORT_C TBool TSwizzleCBase::IsIdRep(const TAny* aPtr)
69 // Test whether aPtr is a valid representation for a stream id.
72 return aPtr==NULL||(TUint32)aPtr&0x1; // implementation dependency
75 EXPORT_C void TSwizzleCBase::__DbgChkPtr(const TAny* aPtr)
77 // Check for invalid pointers.
80 __ASSERT_ALWAYS(IsPtrRep(aPtr),Panic(EStoreSwizzleBadPtr));
83 EXPORT_C void TSwizzleCBase::__DbgChkRef(TStreamRef aRef)
85 // Check for an invalid out-of-stream reference.
88 __ASSERT_ALWAYS((IsPtrRep(aRef.Ptr())&&aRef.Function()!=NULL)||(IsIdRep(aRef.Ptr())&&aRef.Function()==NULL),Panic(EStoreSwizzleBadReference));