1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptomgmtlibs/securitycommonutils/source/ipcstream/ipcbuf.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,98 @@
     1.4 +/*
     1.5 +* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of the License "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +* Library to add s32strm support for IPC (ie. stream via multiple IPC read/writes instead of
    1.19 +* copying to a buffer and streaming to/from there.
    1.20 +*
    1.21 +*/
    1.22 +
    1.23 +
    1.24 +/**
    1.25 + @file
    1.26 +*/
    1.27 +#include "ipcbuf.h"
    1.28 +
    1.29 +
    1.30 +EXPORT_C void RIpcBuf::Open(const RMessagePtr2& aMessage, TInt aMessageSlot)
    1.31 +	{
    1.32 +	iMessage = aMessage;
    1.33 +	iMessageSlot = aMessageSlot;
    1.34 +	iReadPos = 0;
    1.35 +	iWritePos = 0;
    1.36 +	}
    1.37 +
    1.38 +EXPORT_C TStreamPos RIpcBuf::DoSeekL(TMark aMark, TStreamLocation aLocation, TInt anOffset)
    1.39 +	{
    1.40 +
    1.41 +	TInt size = iMessage.GetDesLengthL(iMessageSlot);
    1.42 +
    1.43 +	switch (aLocation)
    1.44 +		{
    1.45 +	case EStreamBeginning:
    1.46 +		// do nothing
    1.47 +		break;
    1.48 +		
    1.49 +	case EStreamMark:
    1.50 +		if (aMark&ERead)
    1.51 +			{
    1.52 +			anOffset += iReadPos;
    1.53 +			}
    1.54 +		else if (aMark&EWrite)
    1.55 +			{
    1.56 +			anOffset += iWritePos;
    1.57 +			}
    1.58 +		break;
    1.59 +		
    1.60 +	case EStreamEnd:
    1.61 +		anOffset += size;
    1.62 +		break;
    1.63 +		
    1.64 +	default:
    1.65 +		User::Panic(KIpcBufPanic, EIpcBufSeekUnknownLocation);
    1.66 +		break;
    1.67 +		}
    1.68 +		
    1.69 +	// offset can't be negative or greater than size
    1.70 +	if (anOffset > size || anOffset < 0)
    1.71 +		{
    1.72 +		User::Panic(KIpcBufPanic, EIpcBufSeekBadOffset);
    1.73 +		}
    1.74 +		
    1.75 +	if (aMark&ERead)
    1.76 +		{
    1.77 +		iReadPos = anOffset;
    1.78 +		}
    1.79 +	else if (aMark&EWrite)
    1.80 +		{
    1.81 +		iWritePos = anOffset;
    1.82 +		}
    1.83 +		
    1.84 +	return TStreamPos(anOffset);
    1.85 +	}
    1.86 +	
    1.87 +EXPORT_C TInt RIpcBuf::DoReadL(TAny *aPtr, TInt aMaxLength)
    1.88 +	{
    1.89 +	TPtr8 ptr((TUint8*)aPtr, aMaxLength);
    1.90 +	iMessage.ReadL(iMessageSlot, ptr, iReadPos);
    1.91 +	TInt len = ptr.Length();
    1.92 +	iReadPos += len;
    1.93 +	return len;
    1.94 +	}
    1.95 +	
    1.96 +EXPORT_C void RIpcBuf::DoWriteL(const TAny* aPtr,TInt aLength)
    1.97 +	{
    1.98 +	TPtr8 ptr((TUint8*)aPtr, aLength, aLength);
    1.99 +	iMessage.WriteL(iMessageSlot, ptr, iWritePos);
   1.100 +	iWritePos += aLength;
   1.101 +	}