--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmlibs/mmfw/Recogniser/src/reader.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,177 @@
+// Copyright (c) 2006-2009 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:
+//
+
+#include "readers.h"
+
+//
+// Creates a new CReader object.
+//
+CReader::CReader(const TDesC8& aBuffer, TReaderType aType)
+ :	iBuffer(aBuffer),
+ 	iType(aType)
+	{
+	}
+
+//
+// Returns ETrue is aPattern is in the buffer, EFalse otherwise.
+//
+TBool CReader::Match(const TDesC8& aPattern)
+	{
+	return (iBuffer.Match(aPattern) != KErrNotFound);
+	}
+
+
+//
+// Reads aBuf.Length() bytes into a descriptor.
+//
+void CReader::ReadBytesL(TDes8& aBuf)
+	{
+	TInt bufLen = aBuf.Length();
+	
+	if (!CheckEnoughData(bufLen))
+		{
+		User::Leave(KErrEof);
+		}
+	
+	for (TInt i = 0; i < bufLen; i++)
+		{
+		aBuf[i] = iBuffer[iBufPos++];
+		}
+	}
+
+
+//
+// Reads a byte from the buffer.
+//
+void CReader::ReadByteL(TUint8& aData)
+	{
+	if (!CheckEnoughData(sizeof(TUint8)))
+		{
+		User::Leave(KErrEof);
+		}
+			
+	aData = iBuffer[iBufPos++];
+	}
+
+//
+// Reads 16 bits of data at the current reader position.
+// Some formats (mainly those developed by Microsoft) still use little-endian
+// encoding of fields. The file format specifications will specify which
+// byte-ordering scheme is used.
+//
+void CReader::Read16L(TUint16& aData, TBool aLittleEndian)
+	{
+	if (!CheckEnoughData(sizeof(TUint16)))
+		{
+		User::Leave(KErrEof);
+		}
+	
+	TUint8 a = iBuffer[iBufPos++];
+	TUint8 b = iBuffer[iBufPos++];
+	
+	if (aLittleEndian)
+		{
+		aData = (b << 8) | a;
+		}
+	else
+		{
+		aData = (a << 8) | b;
+		}
+	}
+
+
+//
+// Reads 32 bits of data at the current reader position.
+// Some formats (mainly those developed by Microsoft) still use little-endian
+// encoding of fields. The file format specifications will specify which
+// byte-ordering scheme is used.
+//
+void CReader::Read32L(TUint32& aData, TBool aLittleEndian)
+	{
+	if (!CheckEnoughData(sizeof(TUint32)))
+		{
+		User::Leave(KErrEof);
+		}
+	
+	TUint8 a = iBuffer[iBufPos++];
+	TUint8 b = iBuffer[iBufPos++];
+	TUint8 c = iBuffer[iBufPos++];
+	TUint8 d = iBuffer[iBufPos++];
+	
+	if (aLittleEndian)
+		{
+		aData = MAKE_INT32(d, c, b, a);
+		}
+	else
+		{
+		aData = MAKE_INT32(a, b, c, d);
+		}
+	}
+
+
+//
+// Reads 64 bits of data at the current reader position.
+// Some formats (mainly those developed by Microsoft) still use little-endian
+// encoding of fields. The file format specifications will specify which
+// byte-ordering scheme is used.
+//
+void CReader::Read64L(TInt64& aData, TBool aLittleEndian)
+	{
+	TUint32 high;
+	TUint32 low;
+	
+	Read32L(high, aLittleEndian);
+	Read32L(low, aLittleEndian);
+	
+	if (aLittleEndian)
+		{
+		aData = MAKE_TINT64(low, high);
+		}
+	else
+		{
+		aData = MAKE_TINT64(high, low);
+		}
+	}
+
+
+//
+//
+//
+TBool CReader::CheckEnoughData(TInt aNeeded)
+	{
+	return ((iBufPos + aNeeded) <= iBuffer.Length());
+	}
+
+
+//
+// Skips forwards or backwards aOffset number of bytes.
+//
+TInt CReader::Seek(TInt aOffset)
+	{
+	TInt newBufPos = iBufPos + aOffset;
+	
+	if ((newBufPos < 0) || (newBufPos >= iBuffer.Length()))
+		{
+		// Trying to seek past the bounds of the buffer.
+		return KErrUnderflow;
+		}
+		
+	iBufPos += aOffset;
+	return KErrNone;
+	}
+	
+
+
+