// fzipup.h

// 

// Copyright (c) 2008 - 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "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:

// Accenture - Initial contribution

//

#ifndef __FZIP_UP_H__

#define __FZIP_UP_H__

#include <zipfile.h>

#include <ezbufman.h>

#include <fshell/ioutils.h>

using namespace IoUtils;

const TUint32 KDefaultZipBufferLength = 0x8000; // 32 Kbytes

//

// class CBufferManager

// manage the i/o buffers for compression, wrapper over the MEZBufferManager mix-in

// takes input data from one file stream & writes the compressed output to another file stream

//

class CBufferManager : public CBase, public MEZBufferManager

	{

public:

	static CBufferManager *NewLC(RFileReadStream& aInput, RFileWriteStream& aOutput, TInt aInputStreamBytes, TInt aBufferSize);

	~CBufferManager();

	inline TInt TotalBytesOut(){ return iBytesWritten; }

	// from MEzBufferManager

	void InitializeL(CEZZStream &aZStream);

	void NeedInputL(CEZZStream &aZStream);

	void NeedOutputL(CEZZStream &aZStream);

	void FinalizeL(CEZZStream &aZStream);

private:

	CBufferManager(RFileReadStream& aInput, RFileWriteStream& aOutput, TInt aInputStreamBytes, TInt aBufferSize);

	void ConstructL();

	void ReadInputL();

	void WriteOutputL(CEZZStream& aZStream);

private:

	RFileReadStream& iInput;

	RFileWriteStream& iOutput;

	TInt iInputStreamBytes; // size of the input stream in bytes

	TInt iReadLength;

	TInt iBufferSize;

	TInt iBytesWritten;

	TUint8* iInputBuffer;

	TUint8* iOutputBuffer;

	TPtr8 iInputDescriptor;

	TPtr8 iOutputDescriptor;

	};

//

// class CZipEntry

// defines attributes associated with a file contained within a zip archive

// note these are taken from PKWARE'S APPNOTE.TXT zip-file format specification

//

class CZipItUp;

class CZipEntry : public CZipArchive

{

public:

	friend class CZipItUp;

	static CZipEntry* NewLC(RFs& aFs, const TDesC& aFilename, const TInt aUid);

        virtual ~CZipEntry();

	void SetOffset(TUint32 aOffset);

	TUint32 ReturnOffset();

	TUint32 FileHeaderSize();

private:

	CZipEntry(RFs& aFs, const TInt aUid);

	void ConstructL(const TDesC& aFilename);

	void CalcCRCL();

private:

        static const TInt iOffset;

        TLocalHeader iLFH;					// Local File Header

        HBufC8* iFileData;					// File Data

        TCentralDirectoryHeader iFH;		// File Header

        RFs& iFs;							// f32 hook

        TBuf8<KMaxFileName>	iAsciiName;	// Ascii file name

        RFile iInput;						// input data from file

        const TInt iUid;					// uid id'ing this particular zip entry

        TSglQueLink iLink;

	};

//

// class CZipItUp

// create a zip archive

//

typedef TSglQue<CZipEntry> CZipMemberLinkedList;

typedef TSglQueIter<CZipEntry> CZipMemberLinkedListIter;

class CZipItUp : public CBase

	{

public:

	static CZipItUp* NewLC(RFs& aFs, TDesC& aArchive);

	virtual ~CZipItUp();

	void AddFileL(const TDesC& aFile);

	void CreateZipL();

private:

	CZipItUp(RFs& aFs, TDesC& aArchive);

	void ConstructL();

	void AddEntryL(CZipEntry& aEntry);

	TBool DuplicateEntryL(const TDesC& aFile);

	void AppendLocalFileHeaderL(RFileWriteStream& aStream, CZipEntry& aZipEntry);

	void AppendCompressedDataL(RFileWriteStream& aStream, CZipEntry& aZipEntry);

	void AppendCentralDirectoryFileHeaderL(RFileWriteStream& aStream, CZipEntry& aEntry);

	void AppendCentralDirectoryTrailerL(RFileWriteStream& aStream);

private:

	RFs& iFs;

	TDesC& iFileName;

	RFile iFile;

	CZipMemberLinkedList iZipMemberLinkedList;

	CZipMemberLinkedListIter iZipMemberLinkedListIter;

	TInt iEntryUid;

  struct TCdt 

		{

        TUint32 iSignature;

		TUint16 iDiskNumber;

		TUint16 iStartDiskNumber;

		TUint16 iLocalEntryCount;

		TUint16 iTotalEntryCount;

		TUint32 iSize;

		TUint32 iOffset;

		TUint16 iCommentLength;

		};

	TCdt iCDT;		// Central Directory Trailer

	};

#endif // __FZIP_UP_H__