Initial checkin. Abstract BPositionIO subclass with handy new output methods

previously introduced by OutputFile class.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5696 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/bin/makeudfimage/DataStream.h

@@ -0,0 +1,36 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//
+//  Copyright (c) 2003 Tyler Dauwalder, [email protected]
+//----------------------------------------------------------------------
+
+/*! \file DataStream.h
+*/
+
+#ifndef _DATA_STREAM_H
+#define _DATA_STREAM_H
+
+#include <DataIO.h>
+
+class DataStream : public BPositionIO {
+public:
+	virtual ssize_t Read(void *buffer, size_t size) = 0;
+	virtual	ssize_t ReadAt(off_t pos, void *buffer, size_t size) = 0;
+
+	virtual ssize_t Write(const void *buffer, size_t size) = 0;
+	virtual ssize_t WriteAt(off_t pos, const void *buffer, size_t size) = 0;
+
+	virtual ssize_t Write(BDataIO &data, size_t size) = 0;
+	virtual ssize_t	WriteAt(off_t pos, BDataIO &data, size_t size) = 0;
+
+	virtual ssize_t Zero(size_t size) = 0;
+	virtual ssize_t	ZeroAt(off_t pos, size_t size) = 0;	
+
+	virtual off_t Seek(off_t position, uint32 seek_mode) = 0;
+	virtual off_t Position() const = 0;
+
+	virtual status_t SetSize(off_t size) = 0;
+};
+
+#endif	// _DATA_STREAM_H