satengine/SatServer/Engine/src/TSatBitOP.cpp
changeset 46 2fa1fa551b0b
parent 42 35488577e233
child 48 78df25012fda
--- a/satengine/SatServer/Engine/src/TSatBitOP.cpp	Mon Aug 23 15:50:31 2010 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,142 +0,0 @@
-/*
-* Copyright (c) 2002-2007 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:  Bit manipulator.
-*
-*/
-
-
-#include    "TSatBitOP.h"
-#include    "SatLog.h"
-
-const TUint8 KBitsInByte( 8 );
-const TUint8 KBitsInWord( 16 );
-const TUint8 KHighBitInByte( 7 );
-const TUint8 KHighBitInWord( 15 );
-
-// -----------------------------------------------------------------------------
-// Extracts bits from bit sequence. First bit is 0 index.
-// The lsb of extracted bits is set to 0 bit.
-// -----------------------------------------------------------------------------
-//
-TUint8 TSatBitOP::ExtractBits(
-    TInt aBitIndex,
-    TUint8 aBitCount,
-    const TDesC8& aBytes )
-    {
-    LOG( DETAILED, "SATENGINE: TSatBitOP::ExtractBits calling" )
-
-    // Calculate the byte where aBitIndex is pointing.
-    const TInt byteIndex( static_cast<TInt>( aBitIndex / KBitsInByte ) );
-    if ( byteIndex > 0 ) // aBitIndex is pointing other than first byte.
-        {
-        LOG( DETAILED, "SATENGINE: TSatBitOP::ExtractBits byteIndex > 0" )
-        // Change the aBitIndex to point the bits 0 to 7, because
-        // we know which byte it is indexing.
-        aBitIndex -= byteIndex * KBitsInByte;
-        }
-
-    TUint8 result( 0 );
-    // Check if the bits to be extracted is in two bytes.
-    // ie. Part of the bits is in one byte and another
-    // part is in the following byte.
-    const TUint8 lastBit( static_cast<TUint8>( aBitIndex + aBitCount ) );
-    LOG2( DETAILED, "SATENGINE: TSatBitOP::ExtractBits lastBit: %i", lastBit )
-    if ( lastBit > KBitsInByte )
-        {
-        // The bits to be extracted reside in two bytes.
-
-        // Take the bytes.
-        const TUint16 word( static_cast<TUint16>(
-            ( aBytes[byteIndex] << KBitsInByte ) + aBytes[byteIndex + 1] ) );
-
-        // Create the mask, which extracts the bits.
-        const TUint16 mask(
-            CreateMask16Bit( static_cast<TUint8>( aBitIndex ), aBitCount ) );
-
-        // Extract the bits from the word.
-        // Result will be shifted so that the lsb bit of the extracted bits
-        // will be in bit 0.
-        result =
-            static_cast<TUint8>( ( word & mask ) >> ( KBitsInWord - lastBit ) );
-        }
-    else
-        {
-        // Bits can be extracted from single byte.
-
-        // Create the mask.
-        const TUint8 mask(
-            CreateMask8Bit( static_cast<TUint8>( aBitIndex ), aBitCount ) );
-
-        const TUint8 byte( aBytes[byteIndex] );
-
-        // Mask the bits and move the lsb of the extracted bits to 0 bit.
-        // Result will be shifted so that the lsb bit of the extracted bits
-        // will be in bit 0.
-        result =
-            static_cast<TUint8>( ( byte & mask ) >> ( KBitsInByte - lastBit ) );
-        }
-
-    LOG( DETAILED, "SATENGINE: TSatBitOP::ExtractBits exiting" )
-    return result;
-    }
-
-// -----------------------------------------------------------------------------
-// Creates a 8-bit mask of ones.
-// -----------------------------------------------------------------------------
-//
-TUint8 TSatBitOP::CreateMask8Bit( TUint8 aBitIndex, TUint8 aCount )
-    {
-    LOG( DETAILED, "SATENGINE: TSatBitOP::CreateMask8Bit calling" )
-
-    // Change aBitIndex to use normal indexing of bits, because
-    // 0 in aBitIndex means MSB.
-    aBitIndex = static_cast<TUint8>( KHighBitInByte - aBitIndex );
-
-    TUint8 result( 0 );
-    TInt i ( 0 );
-    for ( i = 0; i < aCount; i++ )
-        {
-        result |= static_cast<TUint8>( 1 << aBitIndex );
-        aBitIndex--;
-        }
-    LOG2( DETAILED, "SATENGINE: TSatBitOP::CreateMask8Bit i: %i", i )
-    LOG2( DETAILED, "SATENGINE: TSatBitOP::CreateMask8Bit exiting, \
-          result: %i", result )
-    return result;
-    }
-
-// -----------------------------------------------------------------------------
-// Creates a 16-bit mask of ones.
-// -----------------------------------------------------------------------------
-//
-TUint16 TSatBitOP::CreateMask16Bit( TUint8 aBitIndex, TUint8 aCount )
-    {
-    LOG( DETAILED, "SATENGINE: TSatBitOP::CreateMask16Bit calling" )
-
-    // Change aBitIndex to use normal indexing of bits, because
-    // 0 in aBitIndex means MSB.
-    aBitIndex = static_cast<TUint8>( KHighBitInWord - aBitIndex );
-
-    TUint16 result( 0 );
-    TInt i ( 0 );
-    for ( i = 0;  i < aCount; i++ )
-        {
-        result |= static_cast<TUint16>( 1 << aBitIndex );
-        aBitIndex--;
-        }
-    LOG2( DETAILED, "SATENGINE: TSatBitOP::CreateMask16Bit i: %i", i )
-    LOG2( DETAILED, "SATENGINE: TSatBitOP::CreateMask16Bit exiting, \
-          result: %i", result )
-    return result;
-    }