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- /*
- *
- * $Id: sourceheader 511311 2006-02-19 14:51:05Z trueg $
- * Copyright (C) 2006 Sebastian Trueg <trueg@k3b.org>
- *
- * This file is part of the K3b project.
- * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
- *
- * 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.
- * See the file "COPYING" for the exact licensing terms.
- */
-
- #ifndef _K3B_ACTIVE_PIPE_H_
- #define _K3B_ACTIVE_PIPE_H_
-
- #include <qcstring.h>
-
- #include <k3b_export.h>
-
-
- class QIODevice;
-
-
- /**
- * The active pipe pumps data from a source to a sink using an
- * additional thread.
- */
- class LIBK3B_EXPORT K3bActivePipe
- {
- public:
- K3bActivePipe();
- virtual ~K3bActivePipe();
-
- /**
- * Opens the pipe and thus starts the
- * pumping.
- *
- * \param closeWhenDone If true the pipes will be closed
- * once all data has been read.
- */
- virtual bool open( bool closeWhenDone = false );
-
- /**
- * Opens the pipe syncroneously and blocks until all data has been
- * pumped through.
- * The pipe is closed afterwards.
- */
- bool pumpSync();
-
- /**
- * Close the pipe
- */
- virtual void close();
-
- /**
- * Set the file descriptor to read from. If this is -1 (the default) then
- * data has to be piped into the in() file descriptor.
- *
- * \param fd The file descriptor to read from.
- * \param close If true the reading file descriptor will be closed on a call to close()
- */
- void readFromFd( int fd, bool close = false );
-
- /**
- * Set the file descriptor to write to. If this is -1 (the default) then
- * data has to read from the out() file descriptor.
- *
- * \param fd The file descriptor to write to.
- * \param close If true the reading file descriptor will be closed on a call to close()
- */
- void writeToFd( int fd, bool close = false );
-
- /**
- * Read from a QIODevice instead of a file descriptor.
- * The device will be opened IO_ReadOnly and closed
- * afterwards.
- */
- void readFromIODevice( QIODevice* dev );
-
- /**
- * Write to a QIODevice instead of a file descriptor.
- * The device will be opened IO_WriteOnly and closed
- * afterwards.
- */
- void writeToIODevice( QIODevice* dev );
-
- /**
- * The file descriptor to write into
- * Only valid if no source has been set
- */
- int in() const;
-
- /**
- * The file descriptor to read from
- * Only valid if no sink has been set
- */
- int out() const;
-
- /**
- * The number of bytes that have been read.
- */
- Q_UINT64 bytesRead() const;
-
- /**
- * The number of bytes that have been written.
- */
- Q_UINT64 bytesWritten() const;
-
- protected:
- /**
- * Reads the data from the source.
- * The default implementation reads from the file desc
- * set via readFromFd or from in()
- */
- virtual int read( char* data, int max );
-
- /**
- * Write the data to the sink.
- * The default implementation writes to the file desc
- * set via writeToFd or out()
- *
- * Can be reimplememented to further process the data.
- */
- virtual int write( char* data, int max );
-
- private:
- class Private;
- Private* d;
- };
-
- #endif
-