userlibandfileserver/fileserver/sfat32/common_constants.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 27 May 2010 14:17:14 +0300
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child 269 d57b86b1867a
permissions -rw-r--r--
Revision: 201021 Kit: 2010121
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// Copyright (c) 1996-2009 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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// f32\sfat\common_constants.h
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// Declarations of the constants etc. commom for FAT16/32 Fsy.
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// 
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//
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/**
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 @file
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 @internalTechnology
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*/
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#ifndef COMMON_CONSTANTS_H
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#define COMMON_CONSTANTS_H
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#include "filesystem_utils.h"
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#include <f32fsys.h>
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#include <f32dbg.h>
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IMPORT_C TUint32 DebugRegister();
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//-- define this for having logs disregarding DebugRegister() settings
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//#define FORCE_LOGS
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE)
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#ifndef FORCE_LOGS
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    #define __PRINT(t)          		{if (DebugRegister()&KFSYS) RDebug::Print(t);}
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    #define __PRINT1(t,a)       		{if (DebugRegister()&KFSYS) RDebug::Print(t,a);}
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    #define __PRINT2(t,a,b)     		{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b);}
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    #define __PRINT3(t,a,b,c)   		{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b,c);}
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    #define __PRINT4(t,a,b,c,d) 		{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b,c,d);}
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    #define __PRINT5(t,a,b,c,d,e) 		{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b,c,d,e);}
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    #define __PRINT6(t,a,b,c,d,e,f) 	{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b,c,d,e,f);}
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    #define __PRINT7(t,a,b,c,d,e,f,g)	{if (DebugRegister()&KFSYS) RDebug::Print(t,a,b,c,d,e,f,g);}
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    #define __PRINT8BIT1(t,a)           {if (DebugRegister()&KFSYS){TFileName temp;temp.Copy(a);RDebug::Print(t,&temp);}}
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    #define __PRINT1TEMP(t,a)           {if (DebugRegister()&KFSERV) {TBuf<KMaxFileName>temp(a);RDebug::Print(t,&temp);}}
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#else //FORCE_LOGS
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    #define __PRINT(t)          		{RDebug::Print(t);}
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    #define __PRINT1(t,a)       		{RDebug::Print(t,a);}
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    #define __PRINT2(t,a,b)     		{RDebug::Print(t,a,b);}
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    #define __PRINT3(t,a,b,c)   		{RDebug::Print(t,a,b,c);}
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    #define __PRINT4(t,a,b,c,d) 		{RDebug::Print(t,a,b,c,d);}
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    #define __PRINT5(t,a,b,c,d,e) 		{RDebug::Print(t,a,b,c,d,e);}
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    #define __PRINT6(t,a,b,c,d,e,f) 	{RDebug::Print(t,a,b,c,d,e,f);}
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    #define __PRINT7(t,a,b,c,d,e,f,g)	{RDebug::Print(t,a,b,c,d,e,f,g);}
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    #define __PRINT8BIT1(t,a)           {{TFileName temp;temp.Copy(a);RDebug::Print(t,&temp);}}
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    #define __PRINT1TEMP(t,a)           {{TBuf<KMaxFileName>temp(a);RDebug::Print(t,&temp);}}
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#endif//FORCE_LOGS
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#define DBG_STATEMENT(text) text
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#else
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#define __PRINT(t)
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#define __PRINT1(t,a)
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#define __PRINT2(t,a,b)
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#define __PRINT3(t,a,b,c)
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#define __PRINT4(t,a,b,c,d)
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#define __PRINT5(t,a,b,c,d,e)
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#define __PRINT6(t,a,b,c,d,e,f)
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#define __PRINT7(t,a,b,c,d,e,f,g)
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#define __PRINT8BIT1(t,a)
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#define __PRINT1TEMP(t,a)
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#define DBG_STATEMENT(text)
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#endif
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//-----------------------------------------------------------------------------
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//-- define this macro in order to enable the DEMAND PAGING DIRECTORY CACHE.
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#define USE_DP_DIR_CACHE
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//-- define this macro in order to use "Rummage Dirictory Cache" feature: searching for the entry in the cache first
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#define USE_DIR_CACHE_RUMMAGE
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//-----------------------------------------------------------------------------
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typedef TUint32 TLinAddr;
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typedef TUint32 TFat32Entry;
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typedef TUint16 TFat16Entry;
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_LIT8(KLit8ReplacementForUnconvertibleUnicodeCharacters, "_");
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_LIT8(KFileSystemName12,"FAT12   ");    ///< Name in BPB given to a Fat12 volume
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_LIT8(KFileSystemName16,"FAT16   ");    ///< Name in BPB given to a Fat16 volume
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_LIT8(KFileSystemName32,"FAT32   ");    ///< Name in BPB given to a Fat32 volume
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_LIT8(KDefaultVendorID, "EPOC");        ///< Vendor Name for BPB for any volume formated using a Symbian OS device
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const TInt KMaxFatFileNameExt=3;		///< Maximum Fat file system file/directory name extension length
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const TInt KNumberOfFatsInternal=1;     ///< Number of FATs for an internal drive
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const TInt KNumberOfFatsExternal=2;     ///< Number of FATs for an internal drive
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const TInt KMaxFatFileName=12;          ///< Maximum Fat file system file/directory name length
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const TInt KMaxFatFileNameWithoutExt=8; ///< Maximum Fat file system file/directory name length without extension
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const TInt KMaxDuplicateShortName=0xFFFF;
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const TInt KMaxVFatEntryName=13;        ///< Maximum entries in a VFat name
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const TInt KMaxFAT16Entries=0xFFF0;	    ///< Maximum number of clusters in a Fat16 Fat table, 65520
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const TInt KMaxFAT12Entries=0xFF0;	    ///< Maximum number of clusters in a Fat12 Fat table, 4080
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const TUint8 KBootSectorMediaDescriptor=0xF8;   ///< Media descriptor for a Fat volume, Generic disk
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const TUint8 KEntryErasedMarker=0xE5;           ///< Erased entry marker for a directory entry
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const TUint EOF_32Bit =0x0fffffff;   ///< End of cluster chain value for Fat32
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const TUint EOF_16Bit =0xffff;       ///< End of cluster chain value for Fat16
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const TUint EOF_12Bit =0xfff;        ///< End of cluster chain value for Fat12
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const TUint KBad_32Bit=0x0ffffff7;   ///< Bad cluster value for Fat32
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const TUint KBad_16Bit=0xfff7;       ///< Bad cluster value for Fat16
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const TUint KBad_12Bit=0xff7;        ///< bad cluster value for Fat12
15
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const TUint   KSpareCluster = 0;          ///< FAT entry value for the spare cluster
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const TUint32 KFatFirstSearchCluster = 2; ///< FAT usable clusters start from 2; FAT[0] and FAT[1] are reserved
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const TUint   KFat16EntrySzLog2 = 1;      ///< Log2(sizeof(TFat16Entry)); FAT16 entry is 2 bytes
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const TUint   KFat32EntrySzLog2 = 2;      ///< Log2(sizeof(TFat32Entry)); FAT32 entry is 4 bytes
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//-----------------------------------------------------------------------------
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/**
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Internal fault codes for FAT fsy
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*/
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enum TFault
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	{
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	EVFatNoLongName,                // 0
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	EFatBadParameter,               // 1
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	EFatBadLocalDrive,              // 2
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	EFatBadBootSectorParameter,     // 3
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	EFatBadDirEntryParameter,       // 4
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	EFatBadStdFormatName,           // 5
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	EFatBadDosFormatName,           // 6
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	EFatCorrupt,                    // 7
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	EFatFilePosBeyondEnd,			// 8 
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	EFatFileSeekIndexTooSmall,      // 9 
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	EFatFileSeekIndexTooSmall2,     // 10
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	ELruCacheBadGranularity,        // 11
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	EFatRawReadTooBig,              // 12
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	EFatReadUidFailed,              // 13
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	ELruCacheFlushNotSupported,     // 14
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	EReadFileSectionFailed,         // 15
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	EBadReplacementForUnconvertibleUnicodeCharacters, // 16
15
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36
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    EFatRAMDriveSizeInvalid,        // 17
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	EFatRAMDriveFreeInvalid,        // 18
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    ECheckFatIndexZero,             // 19
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36
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    EFatCache_BadGranularity,       // 20
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    EFatCache_DiscardingDirtyData,  // 21
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    EFatCache_NotImplemented,       // 22
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    EFatCache_BadFatType,           // 23
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36
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    EFatTable_InvalidIndex,         // 24
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	};
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//-----------------------------------------------------------------------------
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#if defined(_DEBUG)
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/** debug IO control functions */
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enum TControlIO
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{
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    ECriticalWriteFailOn,   ///< 0
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    ECriticalWriteFailOff,  ///< 1
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    ERuggedFSysOn,          ///< 2
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    ERuggedFSysOff,         ///< 3
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    EIsRuggedFSys,          ///< 4
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    ENCNotifierHang,        ///< 5
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    ENCNotifierClear,       ///< 6
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    ECNotifier,             ///< 7
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    ECNotifierCancel,       ///< 8
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	ENCNotifierRepeat,      ///< 9
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	ELocalTimeForRemovableMediaOn,  ///< 10
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	ELocalTimeForRemovableMediaOff, ///< 11
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	ELocalTimeUsedOnRemovableMedia, ///< 12
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	ECreationTime,                  ///< 13
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	EDisableFATDirCache,			///<14
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	EDumpFATDirCache,				///<15
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	EFATDirCacheInfo,				///<16
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    EExtCustom=KMaxTInt/2
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    };
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const TUid KSID_Test1={0x10210EB3}; ///< SID of the test that will define and set test property to control volume mounting
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//-- bit flags passed by test property value. Used to control some volume mounting features.
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const TUint32 KMntDisable_FsInfo       = 0x00000001; //-- mask for disabling/enabling FSInfo information
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const TUint32 KMntDisable_FatBkGndScan = 0x00000002; //-- mask for disabling/enabling FAT background scanner
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#endif //#if defined(_DEBUG)
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#endif //COMMON_CONSTANTS_H
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