F:/KPlato/koffice/libs/store/KoStoreDevice.h

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/* This file is part of the KDE project
   Copyright (C) 2000 David Faure <faure@kde.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/

#ifndef koStoreDevice_h
#define koStoreDevice_h

#include <KoStore.h>

class KoStoreDevice : public QIODevice
{
public:
  KoStoreDevice( KoStore * store ) : m_store(store) {
      // koffice-1.x behavior compat: a KoStoreDevice is automatically open
      setOpenMode( m_store->mode() == KoStore::Read ? QIODevice::ReadOnly : QIODevice::WriteOnly );
  }
  ~KoStoreDevice() {}

  virtual bool isSequential() const { return true; }

  virtual bool open( OpenMode m ) {
    setOpenMode(m);
    if ( m & QIODevice::ReadOnly )
      return ( m_store->mode() == KoStore::Read );
    if ( m & QIODevice::WriteOnly )
      return ( m_store->mode() == KoStore::Write );
    return false;
  }
  virtual void close() {}

  qint64 size() const {
    if ( m_store->mode() == KoStore::Read )
      return m_store->size();
    else
      return 0xffffffff;
  }

  virtual qint64 readData( char *data, qint64 maxlen ) { return m_store->read(data, maxlen); }
  virtual qint64 writeData( const char *data, qint64 len ) { return m_store->write( data, len ); }

#if 0
  int getch() {
    char c[2];
    if ( m_store->read(c, 1) == -1)
      return -1;
    else
      return c[0];
  }
  int putch( int _c ) {
    char c[2];
    c[0] = _c;
    c[1] = 0;
    if (m_store->write( c, 1 ) == 1)
      return _c;
    else
      return -1;
  }
  int ungetch( int ) { return -1; } // unsupported
#endif

  // See QIODevice
  virtual qint64 pos() const { return m_store->pos(); }
  virtual bool seek( qint64 pos ) { return m_store->seek(pos); }
  virtual bool atEnd() const { return m_store->atEnd(); }

protected:
  KoStore * m_store;
};

#endif

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