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/*
* Copyright (C) 2007-2011 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_BUFFER_H
#define BU_BUFFER_H
#include "bu/filter.h"
namespace Bu
{
class Buffer : public Bu::Filter
{
public:
Buffer( Bu::Stream &rNext, int iWhat=Both, int iBufSize=4096 );
virtual ~Buffer();
enum
{
Write = 1,
Read = 2,
Both = 3
};
virtual void start();
virtual Bu::size stop();
virtual Bu::size read( void *pBuf, Bu::size nBytes );
virtual Bu::size write( const void *pBuf, Bu::size nBytes );
using Stream::write;
Bu::size getReadFill() { return iReadBufFill; }
bool isWritePending() { return iWriteBufFill > 0; }
virtual void flush();
virtual bool isEos();
private:
void fillReadBuf();
private:
Bu::size sSoFar;
int iBufSize;
char *sReadBuf;
char *sWriteBuf;
int iReadBufFill;
int iReadPos;
int iWriteBufFill;
int iWritePos;
int iWhat;
};
};
#endif
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