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/***************************************************************************
ringbuffer.h - description
-------------------
begin : Sun March 21 2004
copyright : (C) 2004 by Martin Witte
email : witte@kawo1.rwth-aachen.de
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#ifndef _KRADIO_FILE_RING_BUFFER_H
#define _KRADIO_FILE_RING_BUFFER_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <qstring.h>
#include <stdio.h>
class FileRingBuffer
{
public:
FileRingBuffer(const QString &filename, Q_UINT64 max_size);
~FileRingBuffer();
bool resize(const QString &filename, Q_UINT64 new_max_size);
size_t addData (const char *src, size_t size);
size_t takeData(char *dst, size_t size);
Q_UINT64 removeData(Q_UINT64 size);
const QString &getFileName () const { return m_FileName; }
Q_UINT64 getMaxSize() const { return m_MaxSize; }
Q_UINT64 getRealSize() const { return m_RealSize; }
Q_UINT64 getFillSize() const { return m_FillSize; }
Q_UINT64 getFreeSize() const { return (m_Start + m_FillSize > m_RealSize) ? m_RealSize - m_FillSize : m_MaxSize - m_FillSize; }
void clear();
bool error() const { return m_error; }
const QString &errorString() const { return m_errorString; }
protected:
Q_UINT64 getFreeSpace(Q_UINT64 &size); // returns position in file + size
Q_UINT64 removeFreeSpace(Q_UINT64 size);
Q_UINT64 getData(Q_UINT64 &size); // returns position in file + size
int m_FileIdx;
QString m_BaseFileName;
QString m_FileName;
FILE *m_File;
Q_UINT64 m_Start;
Q_UINT64 m_MaxSize;
Q_UINT64 m_RealSize;
Q_UINT64 m_FillSize;
QString m_errorString;
bool m_error;
};
#endif
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