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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2020 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// Base class for input streams with a buffer
//
#ifndef __RDR_BUFFEREDINSTREAM_H__
#define __RDR_BUFFEREDINSTREAM_H__
#include <sys/time.h>
#include <rdr/InStream.h>
namespace rdr {
class BufferedInStream : public InStream {
public:
virtual ~BufferedInStream();
size_t pos() override;
protected:
size_t availSpace() { return start + bufSize - end; }
void ensureSpace(size_t needed);
private:
virtual bool fillBuffer() = 0;
bool overrun(size_t needed) override;
private:
size_t bufSize;
size_t offset;
uint8_t* start;
struct timeval lastSizeCheck;
size_t peakUsage;
protected:
BufferedInStream();
};
} // end of namespace rdr
#endif
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