deflateoutputstreambuf.h

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#ifndef DEFLATEOUTPUTSTREAMBUF_H
#define DEFLATEOUTPUTSTREAMBUF_H

#include "zipios-config.h"

#include "meta-iostreams.h"
#include <vector>

#include <zlib.h>

#include "filteroutputstreambuf.h"
#include "ziphead.h"
#include "zipios_defs.h"

namespace zipios {

using std::vector ;

class BaseExport DeflateOutputStreambuf : public FilterOutputStreambuf {
public:

  explicit DeflateOutputStreambuf( streambuf *outbuf, bool user_init = false, 
                                   bool del_outbuf = false ) ;

  virtual ~DeflateOutputStreambuf() ;

  bool init( int comp_level = 6 ) ;
  bool closeStream() ;
  
  uint32 getCrc32() const         { return _crc32 ;           }

  uint32 getCount() const         { return _overflown_bytes ; } 

protected:
  virtual int overflow( int c = EOF ) ;
  virtual int sync() ;

  bool flushOutvec() ;

  void endDeflation() ;

private:
  z_stream _zs ;
  bool _zs_initialized ;
protected: // FIXME: reconsider design?
  const int _invecsize ;
  vector< char > _invec ;
  const int _outvecsize ;
  vector< char > _outvec ;

  uint32 _crc32 ;
  uint32 _overflown_bytes ;
};


} // namespace



#endif

/*
  Zipios++ - a small C++ library that provides easy access to .zip files.
  Copyright (C) 2000  Thomas Søndergaard
  
  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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/