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IODevice.h

/*****************************************************************************
 * Author:   Valient Gough <vgough@pobox.com>
 *
 *****************************************************************************
 * Copyright (c) 2001, Valient Gough
 *
 * This library is free software; you can distribute it and/or modify it under
 * the terms of the GNU Lesser General Public License (LGPL), 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 LGPL in the file COPYING for more
 * details.
 *
 */

#ifndef _IODevice_incl_
#define _IODevice_incl_

#include <rel/SmartPtr.h>
#include <stdint.h>

namespace rel
{

    class OpaqueValue;

    class IODevice
    {
    public:
        typedef int64_t size_type;

        IODevice();
        virtual ~IODevice();

        virtual int getReadDescriptor() const;

        virtual bool isDirectAccess() const;

        virtual size_type at() const;

        virtual bool at(size_type offset);

        // return true if at end of stream
        virtual bool atEnd() const;


        virtual size_type writeBytes(const char *data, size_type len);

        virtual void flush();

        virtual size_type readBytes(char *data, size_type maxLen);



        virtual SmartPtr<char*> print();

    private:
    };


} // namespace rel

#endif

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