1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef IFDGENERALENTRY_H

    17 #define IFDGENERALENTRY_H

    18 

    19 #include <e32base.h>

    20 

    21 const TUint8 KNullCharacter = '\0';

    22 

    23 class CIfdGeneral;

    24 

    25 class CIfdGeneralEntry : public CBase

    26 	{

    27 public:

    28 	friend class CExifVerifier;	

    29 

    30 public:

    31 	static CIfdGeneralEntry* NewLC();

    32 	static CIfdGeneralEntry* NewLC(const TUint& aTag, const TUint& aFormat, const TUint& aComponentCount, const TUint8* aParam, CIfdGeneral* aIfd);

    33 	static CIfdGeneralEntry* NewL(const TUint& aTag, const TUint& aFormat, const TUint& aComponentCount, const TUint8* aParam, CIfdGeneral* aIfd, TBool& aUnknownTag);

    34 

    35 	~CIfdGeneralEntry();

    36 

    37 	TUint Tag();

    38 	TUint Format();

    39 	TUint ComponentCount();

    40 	TUint ValueOffset();

    41 	const TUint8* ActualValue(); 

    42 	

    43 	// Accessor functions.

    44 	

    45 

    46 	// Returns the number of additional data bytes stored for an IfdEntry (outside of the 12 byte directory entry)

    47 	TInt ExtraSize();

    48 	// returns the total size of the ifd entry

    49 	TInt TotalSize();		

    50 

    51 	// Alter fields.

    52 	TInt UpdateRational(const TInt aNumerator, const TInt aDenominator);

    53 	TInt UpdateString(const HBufC8* aStringValue);

    54 	TInt UpdateInteger(const TInt aIntegerValue);

    55 	TInt UpdateShort(const TUint16 aShortValue);

    56 	TInt UpdateData(TUint aComponentCount, const TUint8* aData); // A catch-all update function.

    57 	// Check whether this entry has data of a particular type.

    58 	TBool IsRationalFormat();

    59 	TBool IsStringFormat();

    60 	TBool IsUndefinedFormat();

    61 	TBool IsIntegerFormat();

    62 	TBool IsShortFormat();

    63 	TBool IsUnicodeData();

    64 

    65 	// Set fields in a new directory entry.

    66 	TInt SetActualData(const TAny* aActualData, const TUint aSize, const TUint aBytes);

    67 

    68 private: // Functions

    69 	void SetTag(const TUint aTag);

    70 	void SetFormat(const TUint aFormat);

    71 	void SetComponentCount(const TUint aCompCount);

    72 	void SetValueOffset(const TUint8* aValueOffset);

    73 

    74 	CIfdGeneralEntry();

    75 	void ConstructL();

    76 	void ConstructL(const TUint& aTag, const TUint& aFormat, TUint aComponentCount, const TUint8* aValueOffset, CIfdGeneral* aIfd, TBool& aUnknownTag);

    77 	

    78 private: // Member variables.

    79 	TUint8* iDirEntryData; // The actual data in a buffer pointed to by this.

    80 	TUint8* iActualData; // Stores n bytes of data pointed to by value offset field.

    81 	CIfdGeneral* iIfd; // not owned

    82 	};

    83 

    84 #endif // IFDGENERALENTRY_H