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74 lines
2.6 KiB
74 lines
2.6 KiB
/*
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Kopete Groupwise Protocol
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inputprotocolbase.h - Ancestor of all protocols used for reading GroupWise input
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Copyright (c) 2004 SUSE Linux AG http://www.suse.com
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Kopete (c) 2002-2004 by the Kopete developers <kopete-devel@kde.org>
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*************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Lesser General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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*************************************************************************
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*/
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#ifndef INPUTPROTOCOLBASE_H
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#define INPUTPROTOCOLBASE_H
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#include <tqobject.h>
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class Transfer;
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/**
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Defines a basic interface for protocols dealing with input from the GroupWise server.
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@author Matt Rogers
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*/
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class InputProtocolBase : public TQObject
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{
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Q_OBJECT
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public:
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enum EventProtocolState { Success, NeedMore, OutOfSync, ProtocolError };
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InputProtocolBase(TQObject *parent = 0, const char *name = 0);
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~InputProtocolBase();
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/**
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* Returns a value describing the state of the object.
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* If the object is given data to parse that does not begin with a recognised event code,
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* it will become OutOfSync, to indicate that the input data probably contains leftover data not processed during a previous parse.
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*/
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uint state() const;
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/**
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* Attempt to parse the supplied data into a Transfer object
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* @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
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* @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.
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*/
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virtual Transfer * parse( const TQByteArray &, uint & bytes ) = 0 ;
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protected:
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/**
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* Reads an arbitrary string
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* updates the bytes parsed counter
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*/
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bool readString( TQString &message );
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/**
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* Check that there is data to read, and set the protocol's state if there isn't any.
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*/
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bool okToProceed();
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/**
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* read a TQ_UINT32 giving the number of following bytes, then a string of that length
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* updates the bytes parsed counter
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* @return false if the string was broken or there was no data available at all
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*/
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bool safeReadBytes( TQCString & data, uint & len );
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protected:
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uint m_state;
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uint m_bytes;
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TQDataStream * m_din;
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};
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#endif
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