sl@0: /*
sl@0: * Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include <s32file.h>
sl@0: #include "t_utils.h"
sl@0: 
sl@0: 
sl@0: const TInt KBufferSize = 1024;
sl@0: 
sl@0: EXPORT_C TBool Utils::CompareFileL(const TDesC& aFileName1, const TDesC& aFileName2, TInt &aError)
sl@0: 	{
sl@0: 	RFile file1, file2;
sl@0: 	RFs fs;
sl@0: 	TInt err1, err2, size1, size2;
sl@0: 	TBool success = EFalse;
sl@0: 
sl@0: 	// checks files are different
sl@0: 	if(aFileName1 == aFileName2)
sl@0: 		{
sl@0: 		aError = KErrNotFound;
sl@0: 		return(EFalse);
sl@0: 		};
sl@0: 
sl@0: 	User::LeaveIfError(fs.Connect());
sl@0: 	CleanupClosePushL(fs);
sl@0: 
sl@0: 	// opens first file
sl@0: 	err1 = file1.Open(fs, aFileName1, EFileRead);
sl@0: 	if (err1 != KErrNone)
sl@0: 		{
sl@0: 		CleanupStack::PopAndDestroy(); // fs
sl@0: 		aError = KErrNotFound;
sl@0: 		return(EFalse);
sl@0: 		}
sl@0: 	CleanupClosePushL(file1);
sl@0: 
sl@0: 	//opens second file
sl@0: 	err2 = file2.Open(fs, aFileName2, EFileRead);
sl@0: 	if (err2 != KErrNone)
sl@0: 		{
sl@0: 		CleanupStack::PopAndDestroy(2); // fs, file1
sl@0: 		aError = KErrNotFound;
sl@0: 		return(EFalse);
sl@0: 		}
sl@0: 	CleanupClosePushL(file2);
sl@0: 
sl@0: 	TBool finished = EFalse;
sl@0: 	HBufC8 *fileBuf1 = HBufC8::NewLC(KBufferSize);
sl@0: 	HBufC8 *fileBuf2 = HBufC8::NewLC(KBufferSize);
sl@0: 	TPtr8 filePtr1(fileBuf1->Des());
sl@0: 	TPtr8 filePtr2(fileBuf2->Des());
sl@0: 
sl@0: 	file1.Size(size1);
sl@0: 	file2.Size(size2);
sl@0: 
sl@0: 	// compares size, no need to do any more checking if they are different
sl@0: 	if(size1 == size2)
sl@0: 		{
sl@0: 		success = ETrue;
sl@0: 		do
sl@0: 			{
sl@0: 			// reads in buffer from each file
sl@0: 			// cannot rely on max length of descriptor so pass in size of 
sl@0: 			// buffer to read
sl@0: 			err1 = file1.Read(filePtr1,KBufferSize);
sl@0: 			err2 = file2.Read(filePtr2,KBufferSize);
sl@0: 			// checks if an error has occured
sl@0: 			if(err1 != KErrNone && err2 != KErrNone)
sl@0: 				{
sl@0: 				finished = ETrue;
sl@0: 				success = EFalse;
sl@0: 				};
sl@0: 			// executes a binary compare
sl@0: 			if(fileBuf1->Compare(*fileBuf2)!=0)
sl@0: 				{
sl@0: 				// binary compare failed, file are different
sl@0: 				finished = ETrue;
sl@0: 				success = EFalse;
sl@0: 				};
sl@0: 			// checks for EOF
sl@0: 			if(fileBuf1->Length() != KBufferSize)
sl@0: 				finished = ETrue;
sl@0: 			}
sl@0: 		while(!finished);
sl@0: 		};
sl@0: 
sl@0: 	
sl@0: 	CleanupStack::PopAndDestroy(5); // fs, file1, file2, fileBuf1, fileBuf2
sl@0: 	return(success);
sl@0: 	};
sl@0: