ZippedInputStream.h

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/*****************************************************************************
 * Copyright (C) 2011 by Benjamin Hadorn (b_hadorn@bluewin.ch)
 *****************************************************************************
 * Project    : Zeus Base Library
 * Module     : ZippedInputStream
 * Package    : Zeus.ZeusBase.System
 * Author     : Benjamin Hadorn
 * Date       : 27.12.2011
 * System     : Zeus-Framework
 *****************************************************************************
 * Licence:                                                                  *
 *   This library is free software; you can redistribute it and/or modify    *
 *   it under the terms of the GNU Lesser General Public License as          *
 *   published by the Free Software Foundation; either version               *
 *   2.1 of the License, or (at your option) any later version.              *
 *                                                                           *
 *   This library is distributed in the hope that it will be useful,         *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
 *   GNU Lesser General Public License for more details.                     *
 *                                                                           *
 *   You should have received a copy of the GNU Lesser General Public        *
 *   License along with this library; if not, write to the Free Software     *
 *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA    *
 *****************************************************************************/

/*****************************************************************************
 * Changes:
 *  27.12.2011 bha: created zeus 2.0
 *****************************************************************************/

#ifndef ZippedInputStreamH
#define ZippedInputStreamH

#include <zeusbase/System/FilterInputStream.h>
#include <zeusbase/System/ZObject.h>
#include <zeusbase/System/Ptr.hpp>
#include "zlib.h"


BEGIN_NAMESPACE_Zeus

/****************************************************************************/
/****************************************************************************/
zeusbase_class TZippedInputStream : public TFilterInputStream
{
  public:
    TZippedInputStream(IInputStream& rParentStream, bool bUseRawInflate = false);

    static Retval decompressStream(const IByteArray& rCompressedInput, IByteArray& rRawOutput);

    //Methods of IInputStream
    virtual Retval MQUALIFIER read(char* pBuffer, Int iBufferSize, Int& rValidSize) const;
    virtual Int MQUALIFIER readItem() const;

  protected:
    virtual ~TZippedInputStream();
    
  private:
    bool m_bUseRawInflate;
    mutable TPtr<z_stream> m_ptrZipStream;
    mutable bool m_bAvailable;
    mutable TByteArray m_aBuffer;
    mutable Int m_iBufferPos;

    void init() const;
    void uninit();
    void readFromSource(Int iBufferSize) const;
};

END_NAMESPACE_Zeus

#endif