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#ifndef BU_NULL_STREAM_H
#define BU_NULL_STREAM_H
#include "bu/stream.h"
namespace Bu
{
/**
* Works a lot like /dev/null on *nix style systems. This class allows
* infinite reading and writing. All operatorns "succeed" even if they
* don't seem to do anything. This is great for testing writing code or
* doing dry runs. When reading, it will produce NULL bytes, so any
* application that would like the ability to produce null streams as a
* snap-in replacement for any other Bu::Stream, this is the right option.
*
* As an added feature, the NullStream will track how many bytes it was
* asked to read and write, allowing you to use it to determine how many
* bytes a write opretion would use without actually writing anything.
*/
class NullStream : public Bu::Stream
{
public:
NullStream();
virtual ~NullStream();
virtual void close();
virtual size_t read( void *pBuf, size_t nBytes );
virtual Bu::String readLine();
virtual size_t write( const void *pBuf, size_t nBytes );
using Bu::Stream::write;
virtual long tell();
virtual void seek( long offset );
virtual void setPos( long pos );
virtual void setPosEnd( long pos );
virtual bool isEos();
virtual bool isOpen();
virtual void flush();
virtual bool canRead();
virtual bool canWrite();
virtual bool isReadable();
virtual bool isWritable();
virtual bool isSeekable();
virtual bool isBlocking();
virtual void setBlocking( bool bBlocking=true );
virtual void setSize( long iSize );
size_t getBytesRead() { return sRead; }
size_t getByetsWritten() { return sWrote; }
private:
size_t sRead;
size_t sWrote;
};
};
#endif
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