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+/*
+ Kopete Groupwise Protocol
+ inputprotocolbase.h - Ancestor of all protocols used for reading GroupWise input
+
+ Copyright (c) 2004 SUSE Linux AG http://www.suse.com
+
+ Kopete (c) 2002-2004 by the Kopete developers <kopete-devel@kde.org>
+
+ *************************************************************************
+ * *
+ * This library is free software; you can redistribute it and/or *
+ * modify it under the terms of the GNU Lesser General Public *
+ * License as published by the Free Software Foundation; either *
+ * version 2 of the License, or (at your option) any later version. *
+ * *
+ *************************************************************************
+*/
+
+#ifndef INPUTPROTOCOLBASE_H
+#define INPUTPROTOCOLBASE_H
+
+#include <qobject.h>
+
+class Transfer;
+/**
+Defines a basic interface for protocols dealing with input from the GroupWise server.
+
+@author Kopete Developers
+*/
+class InputProtocolBase : public QObject
+{
+Q_OBJECT
+public:
+ enum EventProtocolState { Success, NeedMore, OutOfSync, ProtocolError };
+ InputProtocolBase(QObject *parent = 0, const char *name = 0);
+ ~InputProtocolBase();
+ /**
+ * Returns a value describing the state of the object.
+ * If the object is given data to parse that does not begin with a recognised event code,
+ * it will become OutOfSync, to indicate that the input data probably contains leftover data not processed during a previous parse.
+ */
+ uint state() const;
+ /**
+ * Attempt to parse the supplied data into a Transfer object
+ * @param bytes this will be set to the number of bytes that were successfully parsed. It is no indication of the success of the whole procedure
+ * @return On success, a Transfer object that the caller is responsible for deleting. It will be either an EventTransfer or a Response, delete as appropriate. On failure, returns 0.
+ */
+ virtual Transfer * parse( const QByteArray &, uint & bytes ) = 0 ;
+protected:
+ /**
+ * Reads an arbitrary string
+ * updates the bytes parsed counter
+ */
+ bool readString( QString &message );
+ /**
+ * Check that there is data to read, and set the protocol's state if there isn't any.
+ */
+ bool okToProceed();
+ /**
+ * read a Q_UINT32 giving the number of following bytes, then a string of that length
+ * updates the bytes parsed counter
+ * @return false if the string was broken or there was no data available at all
+ */
+ bool safeReadBytes( QCString & data, uint & len );
+
+protected:
+ uint m_state;
+ uint m_bytes;
+ QDataStream * m_din;
+};
+
+#endif