1 // Copyright (c) 2003-2009 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".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #if !defined(__VJCOMP_INL_)

    17 #define __VJCOMP_INL_

    18 

    19 /**

    20 Tests if the delta value is compressible into the 16 bit VJ delta format.

    21 The aDelta value actually needs a 33 bit signed integer to hold the entire

    22 possible range, but the twos complement math works out if it's just

    23 stored as a 32 bit unsigned integer.

    24 

    25 @param aDelta Delta value to test

    26 

    27 @return ETrue if the value is compressible

    28 */

    29 inline TBool CVJCompressor::IsDeltaCompressible(TUint32 aDelta) const

    30 	{

    31 	// This test is a faster equivalent to:

    32 	//    (aDelta >= 0) && (aDelta <= 0xffff)

    33 	// if aDelta were signed

    34 	return !(aDelta & 0xffff0000);

    35 	}

    36 

    37 

    38 inline TUint8* CVJCompressor::GetTCPOpts(ThdrTCP* aTCPHeader) const

    39 /**

    40 Returns a pointer to the start of the TCP options (if there are any).

    41 

    42 @param aTCPHeader TCP header

    43 

    44 @return Start of the TCP options

    45 */

    46 	{

    47 	TUint8* aPtr = (TUint8*)aTCPHeader+KTCPHeaderSize;

    48 	return aPtr;

    49 	}

    50 

    51 

    52 

    53 #endif // __VJCOMP_INL_

    54