syncmlfw/dm/syncagent/src/nsmldmbitreader.cpp
changeset 0 b497e44ab2fc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/syncmlfw/dm/syncagent/src/nsmldmbitreader.cpp	Thu Dec 17 09:07:52 2009 +0200
@@ -0,0 +1,83 @@
+/*
+* Copyright (c) 2002 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 reader utility
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "nsmldmbitreader.h"
+
+// ---------------------------------------------------------
+// TNSmlDMBitreader::TNSmlDMBitreader()
+// Constructor
+// ---------------------------------------------------------
+TNSmlDMBitreader::TNSmlDMBitreader( const TDesC8& aData ) : RDesReadStream(aData), iByte(0), iBits(0)
+	{
+	}
+
+// ---------------------------------------------------------
+// TNSmlDMBitreader::ReadUintL()
+// 
+// ---------------------------------------------------------
+TUint32 TNSmlDMBitreader::ReadUintL( TInt aBitcount )
+	{
+	if( (aBitcount < 0) || (aBitcount > 32) )
+		{
+		User::Leave(KErrOverflow);
+		}
+
+	TUint32 value(0);
+
+	while( aBitcount-- )
+		{
+		value <<= 1;
+		value |= FetchNextBitL();
+		}
+	return value;
+	}
+
+// ---------------------------------------------------------
+// TNSmlDMBitreader::ReadL()
+// 
+// ---------------------------------------------------------
+void TNSmlDMBitreader::ReadL( TInt aBitcount, TDes8& aBuffer )
+	{
+	if( (aBitcount>>3) > aBuffer.MaxLength() )
+		{
+		User::Leave(KErrOverflow);
+		}
+	aBuffer.Zero();
+	for( TInt i = 0; i < (aBitcount>>3); i++ )
+		{
+		aBuffer.Append((TUint8)ReadUintL(8));
+		}
+	}
+// ---------------------------------------------------------
+// TNSmlDMBitreader::FetchNextBitL()
+// 
+// ---------------------------------------------------------
+TUint32 TNSmlDMBitreader::FetchNextBitL()
+	{
+	if( --iBits < 0 )
+		{
+		iByte = ReadUint8L();
+		iBits = 7;
+		}
+	return (iByte>>iBits)&0x1;
+	}
+
+
+//  End of File