/*

* Copyright (c) 1998-2009 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: 

* e32tools\petran\Szip\compress.cpp

*

*/

#include "deflate.h"

#if defined(__MSVCDOTNET__) || defined(__TOOLS2__)

#include <fstream>

#else //__MSVCDOTNET__

#include <fstream.h>

#endif //__MSVCDOTNET__

#include <assert.h>

#include "h_utl.h"

class TFileOutput : public TBitOutput

	{

	enum {KBufSize=0x1000};

public:

	TFileOutput(ostream& os);

	void FlushL();

	TUint32 iDataCount; 

private:

	void OverflowL();

private:

	ostream& iOutStream;

	TUint8 iBuf[KBufSize];

	};

TFileOutput::TFileOutput(ostream& os)

	:iOutStream(os)

	{

	Set(iBuf,KBufSize);

	}

void TFileOutput::OverflowL()

//

// empty the buffer and reset the pointers

//

	{

	FlushL();

	Set(iBuf,KBufSize);

	}

void TFileOutput::FlushL()

//

// write out the contents of the buffer

//

	{

	TInt len=Ptr()-iBuf;

	if (len)

		{

		iOutStream.write(reinterpret_cast<char *>(iBuf), len); // write extended header

		iDataCount += len;

		}

	}

void DeflateCompress(char *bytes,TInt size,ostream &os)

	{

	TFileOutput* output=new TFileOutput(os);

	output->iDataCount = 0;

	DeflateL((TUint8*)bytes,size,*output);

	output->FlushL();

	delete output;

	}

TUint32 DeflateCompressCheck(char *bytes,TInt size,ostream &os)

	{

	TUint32 r = 0;

	TFileOutput* output=new TFileOutput(os);

	output->iDataCount = 0;

	DeflateL((TUint8*)bytes,size,*output);

	output->FlushL();

	r = output->iDataCount; // Preserve the compressed count

	delete output;

	return r; // Return the compressed size

	}

class TFileInput : public TBitInput

	{

public:

	TFileInput(unsigned char* source,int size);

private:

	void UnderflowL();

private:

	TUint8* iReadBuf;

	TInt iSize;

	};

TFileInput::TFileInput(unsigned char* source,int size)

	:iReadBuf(source),iSize(size)

	{

	Set(source,iSize*8);

	}

void TFileInput::UnderflowL()

	{

	Print(ESevereError,"Buffer underflow on deflate\n");

	}

void InflateUnCompress(unsigned char* source, int sourcesize,unsigned char* dest, int destsize)

	{

	TFileInput* input = new TFileInput(source, sourcesize);

	CInflater* inflater=CInflater::NewLC(*input);

	inflater->ReadL(dest,destsize);

	delete inflater;

	delete input;

	}