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/*
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* Copyright (c) 2002-2005 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 "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: Extracts a bits from byte row.
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*
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*/
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#ifndef TSATBITOP_H
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#define TSATBITOP_H
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// INCLUDES
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#include <e32std.h>
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// CLASS DECLARATION
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/**
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* Bit manipulations
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*
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* @lib SatEngine.lib
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* @since 2.6
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*/
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class TSatBitOP
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{
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public: // New functions
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/**
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* Extracts bits from byte row.
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* Following assumptions is made about parameters:
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* aBitCount is 1 to 8.
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* @param aBitIndex Index to bit, where extraction starts. Index of
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* MSB from aBytes[0] is 0.
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* @param aBitCount Number of extracted bits.
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* @param aBytes Array of bytes where bits are extracted.
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* @return Value of extracted bits.
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*/
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static TUint8 ExtractBits(
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TInt aBitIndex,
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TUint8 aBitCount,
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const TDesC8& aBytes );
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/**
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* Creates a mask of ones, starting from aBitIndex
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* to aBitIndex + aCount.
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* if aMSB is 5 and aCount is 2 then the mask would be
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* 0011 0000.
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* @param aBitIndex. 0 means MSB and 7 is LSB.
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* @param aCount 1 to 8.
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* @return Mask.
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*/
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static TUint8 CreateMask8Bit(
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TUint8 aBitIndex,
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TUint8 aCount );
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/**
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* Creates a mask of ones, starting from aBitIndex to aBitIndex +
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* aCount.
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* @param aBitIndex 0 means MSB and 15 means LSB.
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* @param aCount 1 to 16.
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* @return Mask of ones.
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*/
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static TUint16 CreateMask16Bit(
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TUint8 aBitIndex,
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TUint8 aCount );
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};
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#endif // TSATBITOP_H
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// End of File
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