// Copyright (c) 2005-2009 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:

// Defines a data recognizer

// Defines a test recognizer class which recognizes data type "test/plain".\n

// 

//

/**

 @file

 @internalComponent - Internal Symbian test code 

*/

#include "TESTREC.H"

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc : Constructor for the recognizer of data type "test\plain" . 

 */

CAppTestRecognizer::CAppTestRecognizer()

	:CApaDataRecognizerType(KUidTestTxtRecognizer,CApaDataRecognizerType::ELow)

	// Text files are low recognition - they don't have a clear signature

	{

	iCountDataTypes=1;

	}

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc : Specifies the buffer size required by the data type

 */

TUint CAppTestRecognizer::PreferredBufSize()

	{

	return KMaxBufferLength;

	}

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc : Returns the data type supported : test\plain

 */

#if defined(_DEBUG)

TDataType CAppTestRecognizer::SupportedDataTypeL(TInt aIndex) const

#else

TDataType CAppTestRecognizer::SupportedDataTypeL(TInt /*aIndex*/) const

#endif

	{

	__ASSERT_DEBUG(aIndex==0,User::Invariant());

	return TDataType(KDataTypeTestPlain);

	}

 /**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc :  Should recognize the data type of the file. 

   Called by the RecognizeL function.

   Checks if the first three bytes are valid uids.If yes the file is not a plain/test

   Verifies if the file extension is .test

   Checks for characters that wont be in a text file.

 */

void CAppTestRecognizer::DoRecognizeL(const TDesC& aName, const TDesC8& aBuffer)

	{

	TBool nameRecognized=EFalse;

	// check if the file has valid UIDs 

	if (aBuffer.Length() >= 16)

		{

		// if the first 3 bytes are valid UIDs,then this file is not a plain/test. 

		// Set iConfidence appropriately and exit.

		const TCheckedUid checkUid(aBuffer.Left(16));    

		if (checkUid.UidType().IsValid())

			{

			iConfidence=ENotRecognized;

			return;

			}

		}

	// Compare if the file extension is .TEST

	if (aName.Length()>4)

		{

		nameRecognized=(aName.Right(5).CompareF(KTestFileExt)==0);

		}

	const TInt length=Min(aBuffer.Length(), KMaxBufferLength);

	if (length<KMinBufferLength && !nameRecognized)

		{

		return;

		}

	// Check for characters that wont be in a text file

	TInt index;

	for (index=0; index<length; index++)

		{

		const TUint chr=aBuffer[index];

		// these are guesses of what WON'T be in a text file

		if (chr<9 || chr==11 || chr==12 || (chr>13 && chr<32))

			{

			break;

			}

		if (chr>148)

			{

			break;

			}

		}

	const TBool validChars=(index==length);

	if (nameRecognized)

		{

		iConfidence=validChars? EProbable : EUnlikely;

		}

	else

		{

		if (!validChars)

			{

			return;

			}

		iConfidence=EPossible;

		}

	iDataType=TDataType(KDataTypeTestPlain);

	}

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc : Creates an instance of the recognizer . 

 */

CApaDataRecognizerType* CAppTestRecognizer::CreateRecognizerL()

	{

	return new (ELeave) CAppTestRecognizer();

	}

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   Desc : Implementation table specifying the implementation uid . 

 */

const TImplementationProxy ImplementationTable[] = 

    {

	IMPLEMENTATION_PROXY_ENTRY(KTestTxtRecognizerValue,CAppTestRecognizer::CreateRecognizerL)

	};

/**

   Recognizer used as part of CommandLine tests

   @SYMPREQ 280 File Handle Support

   FunctionDesc : Returns the implementation table. 

 */

EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)

    {

    aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);

    return ImplementationTable;

    }