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/*
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* Copyright (c) 2007-2009 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 the License "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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* Library to add s32strm support for IPC (ie. stream via multiple IPC read/writes instead of
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* copying to a buffer and streaming to/from there.
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*
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*/
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/**
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@file
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*/
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#include "ipcbuf.h"
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EXPORT_C void RIpcBuf::Open(const RMessagePtr2& aMessage, TInt aMessageSlot)
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{
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iMessage = aMessage;
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iMessageSlot = aMessageSlot;
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iReadPos = 0;
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iWritePos = 0;
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}
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EXPORT_C TStreamPos RIpcBuf::DoSeekL(TMark aMark, TStreamLocation aLocation, TInt anOffset)
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{
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TInt size = iMessage.GetDesLengthL(iMessageSlot);
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switch (aLocation)
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{
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case EStreamBeginning:
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// do nothing
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break;
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case EStreamMark:
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if (aMark&ERead)
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{
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anOffset += iReadPos;
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}
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else if (aMark&EWrite)
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{
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anOffset += iWritePos;
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}
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break;
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case EStreamEnd:
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anOffset += size;
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break;
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default:
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User::Panic(KIpcBufPanic, EIpcBufSeekUnknownLocation);
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break;
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}
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// offset can't be negative or greater than size
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if (anOffset > size || anOffset < 0)
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{
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User::Panic(KIpcBufPanic, EIpcBufSeekBadOffset);
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}
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if (aMark&ERead)
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{
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iReadPos = anOffset;
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}
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else if (aMark&EWrite)
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{
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iWritePos = anOffset;
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}
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return TStreamPos(anOffset);
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}
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EXPORT_C TInt RIpcBuf::DoReadL(TAny *aPtr, TInt aMaxLength)
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{
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TPtr8 ptr((TUint8*)aPtr, aMaxLength);
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iMessage.ReadL(iMessageSlot, ptr, iReadPos);
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TInt len = ptr.Length();
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iReadPos += len;
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return len;
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}
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EXPORT_C void RIpcBuf::DoWriteL(const TAny* aPtr,TInt aLength)
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{
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TPtr8 ptr((TUint8*)aPtr, aLength, aLength);
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iMessage.WriteL(iMessageSlot, ptr, iWritePos);
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iWritePos += aLength;
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}
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