diff -r 000000000000 -r af10295192d8 linklayerprotocols/pppnif/INC/vjcomp.inl --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/linklayerprotocols/pppnif/INC/vjcomp.inl Tue Jan 26 15:23:49 2010 +0200 @@ -0,0 +1,54 @@ +// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). +// All rights reserved. +// This component and the accompanying materials are made available +// under the terms of "Eclipse Public License v1.0" +// which accompanies this distribution, and is available +// at the URL "http://www.eclipse.org/legal/epl-v10.html". +// +// Initial Contributors: +// Nokia Corporation - initial contribution. +// +// Contributors: +// +// Description: +// + +#if !defined(__VJCOMP_INL_) +#define __VJCOMP_INL_ + +/** +Tests if the delta value is compressible into the 16 bit VJ delta format. +The aDelta value actually needs a 33 bit signed integer to hold the entire +possible range, but the twos complement math works out if it's just +stored as a 32 bit unsigned integer. + +@param aDelta Delta value to test + +@return ETrue if the value is compressible +*/ +inline TBool CVJCompressor::IsDeltaCompressible(TUint32 aDelta) const + { + // This test is a faster equivalent to: + // (aDelta >= 0) && (aDelta <= 0xffff) + // if aDelta were signed + return !(aDelta & 0xffff0000); + } + + +inline TUint8* CVJCompressor::GetTCPOpts(ThdrTCP* aTCPHeader) const +/** +Returns a pointer to the start of the TCP options (if there are any). + +@param aTCPHeader TCP header + +@return Start of the TCP options +*/ + { + TUint8* aPtr = (TUint8*)aTCPHeader+KTCPHeaderSize; + return aPtr; + } + + + +#endif // __VJCOMP_INL_ +