imgtools/imglib/filesystem/include/fat32filesystem.h
changeset 0 044383f39525
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imgtools/imglib/filesystem/include/fat32filesystem.h	Tue Oct 27 16:36:35 2009 +0000
@@ -0,0 +1,116 @@
+/*
+* 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 the License "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: 
+* FAT32 file system Class for FileSystem component
+* @internalComponent
+* @released
+*
+*/
+
+
+#ifndef FAT32FILESYSTEM_H
+#define FAT32FILESYSTEM_H
+
+#include "filesystemclass.h"
+#include "errorhandler.h"
+#include "dirregion.h"
+#include "filesysteminterface.h"
+
+// constant values to initialize FSInfo data structure
+const unsigned int KFSIleadSign=0x41615252;
+const unsigned int KFSIStrutSign=0x61417272;
+const unsigned int KFSIFreeCount=0xFFFFFFFF;
+const unsigned int KFSITrailSign=0xAA550000;
+
+//sector number containing copy of FAT Table and Boot sector
+const unsigned int KBootBackupSector=6;
+const unsigned int KFatBackupSector=7;
+
+/**
+Class representing FSINFO DataStrcuture
+
+@internalComponent
+@released
+*/
+class FSInfo
+{
+
+public: 
+	void SetFSInfo();
+public:
+	//lead signature use to validate a FSInfo structure
+	unsigned int FSI_LeadSign;
+	//field for future expansion
+	unsigned char FSI_Reserved[KFSIFutureExpansion];
+	//another signature
+	unsigned int FSI_StrucSig;
+	//contains the last known free cluster count on the  volume
+	unsigned int FSI_Free_Count;
+	//indicates the cluster number at which the driver should start looking for free clusters
+	unsigned int FSI_Nxt_Free;
+	//reserved for future expansion
+	unsigned int FSI_Reserved2[KFSIKFSIFutureExpansion2];
+	//use to validate that this is an fact an FSInfo sector
+	unsigned int FSI_TrailSig;
+
+};
+
+// Use to initialize the FSInfo data structure
+inline void FSInfo::SetFSInfo()
+{
+	FSI_LeadSign=KFSIleadSign;
+	for(int i=0;i<KFSIFutureExpansion;i++)
+		FSI_Reserved[i]=0;
+	FSI_StrucSig=KFSIStrutSign;
+	FSI_Free_Count=KFSIFreeCount;
+	FSI_Nxt_Free=KFSIFreeCount;
+	for(int j=0;j<KFSIKFSIFutureExpansion2;j++)
+		FSI_Reserved2[j]=0;
+	FSI_TrailSig=KFSITrailSign;
+}
+/**
+Class representing concrete class representing FAT32 type 
+@internalComponent
+@released
+*/
+class CFat32FileSystem : public CFileSystem
+{
+public:
+	CFat32FileSystem(){};
+	~CFat32FileSystem();
+
+public:
+	void CreateBootSector(Long64 aPartitionSize,ConfigurableFatAttributes* aConfigurableFatAttributes);
+	void WriteBootSector(ofstream& aOutPutStream);
+	void CreateFatTable(ofstream& aOutPutStream);
+	void CreateFSinfoSector(ofstream& aOutPutStream);
+	void RestReservedSectors(ofstream& aOutPutStream);
+	void ComputeClusterSizeInBytes();
+	void ComputeRootDirSectors();
+	void ComputeBytesPerSector();
+	void ComputeTotalClusters(Long64 aPartitionSize);
+	void Execute(Long64 aPartitionSize,EntryList aNodeList,
+				ofstream& aOutPutStream,ConfigurableFatAttributes* aConfigurableFatAttributes);
+	void ErrorExceptionClean();
+
+private:
+	TFAT32BootSector iFAT32BootSector;
+	//use to contain the data structure used to create a FAT Table
+	TClustersPerEntryMap* iClustersPerEntry;
+	FSInfo iFSInfo; //FSInfo data structure
+	//Pointer to dynamic array representing the content of FSInfo data structure
+	unsigned char* FSinfoData;
+};
+
+#endif //FAT32FILESYSTEM_H