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// Copyright (c) 2006-2009 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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// Performs various different disk calculations
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//
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//
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#include "basetestfat32calculate.h"
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#include "sl_bpb1.h"
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static RRawDisk TheDisk;
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/**
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Class Constructor
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*/
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CBaseTestFat32Calculate::CBaseTestFat32Calculate()
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{
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SetTestStepName(KTestStepCalculate);
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}
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/**
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Class Destructor
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*/
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CBaseTestFat32Calculate::~CBaseTestFat32Calculate()
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{
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}
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/**
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Get the calculation to be performed from the ini file and carry out that
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particular calculation
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1. If SetGreater is specified in the ini file then the function SetToGreater
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is called the set the cluster count to a value greater than it actually is
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2. If ComputeFatSize is specified in the ini file then the function
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ComputeFatSize is called to computer the size of each FAT
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3. If ClusterCount is specified in the ini file, then the function
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ClusterCount is called to return the clutser count of the volume
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@return EPass if test passes and EFail if test fails
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*/
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TVerdict CBaseTestFat32Calculate::doTestStepL()
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{
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SetTestStepResult(EFail);
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_LIT(KCalculation,"Calculation");
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TBufC<6> calculationType;
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TPtrC16 calculation = calculationType;
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TBool alright = GetStringFromConfig(ConfigSection(), KCalculation, calculation);
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if(alright)
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{
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if (calculation == _L("SetGreater"))
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{
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TInt r = SetToGreater(iClusterCount, 1000);
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if (r != KErrNone)
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{
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_LIT(KFailClusterCount, "Failed to Set to a greater cluster count - r=%d");
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INFO_PRINTF2(KFailClusterCount, r);
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return TestStepResult();
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}
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}
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if (calculation == _L("ComputeFatSize"))
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{
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TInt r = ComputeFatSize();
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if (r != KErrNone)
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{
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_LIT(KFailComputeFatSz, "Failed to compute FatSz - r=%d");
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INFO_PRINTF2(KFailComputeFatSz, r);
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return TestStepResult();
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}
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}
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if (calculation == _L("ClusterCount"))
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{
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TInt r = CheckClusterCount(iClusterCount);
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if (r != KErrNone)
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{
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_LIT(KFailComputeClusCnt, "Failed to compute ClusterCount - r=%d");
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INFO_PRINTF2(KFailComputeClusCnt, r);
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return TestStepResult();
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}
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}
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if (calculation == _L("CheckFSInfo"))
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{
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TInt r = CheckFSInfo(0x3E8);
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if (r != KErrNone)
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{
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_LIT(KFailCheckFSInfo, "Failed FSInfo check - r=%d");
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INFO_PRINTF2(KFailCheckFSInfo, r);
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return TestStepResult();
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}
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}
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}
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else
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{
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_LIT(KIniFileError, "Failed to read calculation type from ini file");
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INFO_PRINTF1(KIniFileError);
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return TestStepResult();
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}
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SetTestStepResult(EPass);
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_LIT(KWritePass, "Calculation Pass");
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INFO_PRINTF1(KWritePass);
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return TestStepResult();
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}
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/**
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Set the cluster count to a value greater than it should be
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The bad cluster count is caluclated as 10000 added to the actual
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cluster count value. The bad cluster count is then written to the disk
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in place of the actual cluster count.
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@param aClusterCount The cluster count of the volume
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@param aPos The position at which to start writing to the raw disk
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@return KErrNone if successful
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*/
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TInt CBaseTestFat32Calculate::SetToGreater(TUint32 aClusterCount, TInt aPos)
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{
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TUint32 badClusterCount;
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badClusterCount = aClusterCount+10000;
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TUint8 num[4];
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TInt i;
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TInt r;
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r = TheDisk.Open(iTheFs, CurrentDrive());
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for (i=0; i<4; i++)
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{
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num[i] = 0;
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num[i] = num[i] + badClusterCount;
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badClusterCount = badClusterCount >> 8;
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}
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TUint8 data[1];
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TPtr8 buffer((TUint8*)&data[0],1);
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for (i=0; i<4; i++)
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{
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aPos = aPos + 1;
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r=TheDisk.Read(aPos,buffer);
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data[0]=num[i];
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r=TheDisk.Write(aPos,buffer);
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}
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TheDisk.Close();
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return r;
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}
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/**
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Calculate the size of each FAT and verify that it is equal the
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value in BPB_FATSz32. The 'BPB_..' values are read directly from the disk
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and the calculation is taken from the Microsoft FAT32 speification document
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@return KErrNone if successful
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*/
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TInt CBaseTestFat32Calculate::ComputeFatSize()
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{
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TInt TmpVal1 = (iDriveSize/512) - iBPB_ResvdSecCnt;
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TInt TmpVal2 = (256 * iBPB_SecPerClus) + iBPB_NumFATs;
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TmpVal2 = TmpVal2 / 2;
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TInt FatSz32 = (TmpVal1 + (TmpVal2 - 1)) / TmpVal2;
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INFO_PRINTF2(_L("FatSz32 = %d"), FatSz32);
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if (iBPB_FATSz32 == FatSz32)
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{
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_LIT(KFatSzPass, "BPB_FATSz32 = %d is equal to calculated value = %d");
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INFO_PRINTF3(KFatSzPass,iBPB_FATSz32, FatSz32 );
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return KErrNone;
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}
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else
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{
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_LIT(KFatSzFail, "BPB_FATSz32 = %d is not equal to the calculated value = %d");
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INFO_PRINTF3(KFatSzFail, iBPB_FATSz32,FatSz32);
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return -1;
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}
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}
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/**
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Verify that the cluster count is greater than 65525.
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If the volume is FAT32 then it should have a cluster count greater than
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65525. Otherwise the volume should be FAT16.
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@param aClusterCount The cluster count of the volume
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@return KErrNone if successful
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*/
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TInt CBaseTestFat32Calculate::CheckClusterCount(TUint32 aClusterCount)
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{
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if (aClusterCount > 65525)
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{
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_LIT(KClusCntPass, "Cluster count is greater than 65525");
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INFO_PRINTF1(KClusCntPass);
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return KErrNone;
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}
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else
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{
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_LIT(KClusCntFail, "Cluster count is not greater than 65525");
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INFO_PRINTF1(KClusCntFail);
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return -1;
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}
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}
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/**
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Read the FSInfo sector at the FSI_Free_Count field.
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Following this check that the last known cluster count is less than
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the actual cluster count of the volume.
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Note: This function should be called after files have been written
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to the disk to ensure that clusters have been occupied
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@param aPos The position at which to start reading from the raw disk
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@return KErrNone if successful
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*/
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TInt CBaseTestFat32Calculate::CheckFSInfo(TInt aPos)
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{
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TUint32 fsInfo;
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TUint32 data;
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TPtr8 buffer((TUint8*)&data,4);
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TInt r = TheDisk.Open(iTheFs, CurrentDrive());
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r = TheDisk.Read(aPos,buffer);
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fsInfo = data;
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TheDisk.Close();
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if (fsInfo < iClusterCount)
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{
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_LIT(KFSInfoPass, "FSInfo Correct, iClusterCount = %08x fsInfo = %08x fsInfo = %08x");
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INFO_PRINTF4(KFSInfoPass, iClusterCount, data, fsInfo);
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return KErrNone;
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}
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else
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{
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_LIT(KFSInfoFail, "FSInfo incorrect, iClusterCount = %08x fsInfo = %08x");
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INFO_PRINTF3(KFSInfoFail, iClusterCount, fsInfo);
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return -1;
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}
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}
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