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