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/*
* The Unix Channel
*
* by Michel Beaudouin-Lafon
*
* Copyright 1990-1995
* Laboratoire de Recherche en Informatique (LRI)
*
* UchMessage streams
*
* $Id$
* $CurLog$
*/
#ifndef MsgStream_H_
#define MsgStream_H_
#include "Stream.h"
#include "ccu/SmartPointer.h"
#include "MsgBuffer.h"
class UchMessage;
class UchBufStream : public UchStream {
protected:
UchMsgBuffer InBuffer;
UchMsgBuffer OutBuffer;
int OutSize;
bool Sync;
UchBufStream (const UchBufStream&);
int ReadInput ();
void HandleWrite ();
void WriteLong (lword);
void WriteShort (sword);
void WriteByte (byte);
void WriteChar (char);
void WriteString (const char*);
void WriteBuf (const byte*, int);
bool ReadLong (lword&);
bool ReadShort (sword&);
bool ReadByte (byte&);
bool ReadChar (char&);
int ReadString (char*, int);
int ReadString (CcuString&);
bool ReadBuf (byte*, int);
public:
UchBufStream (UchAddress* = 0, UchAddress* = 0);
~UchBufStream ();
void InputBuffer (int min, int grow, int max);
void OutputBuffer (int min, int grow, int max);
inline bool GetSyncMode () { return Sync; }
inline void SetSyncMode (bool s) { Sync = s; Flush (); }
inline void FlushSize (int n) { OutSize = n; }
virtual void Flush ();
virtual void Closing (bool);
};
class UchMsgStream : public UchBufStream {
protected:
enum STATE { WAITING, GOT_TYPE, GOT_LENGTH, DONE};
enum TYPE { MSG = 1, ASK, ANS, SYNC, ASYNC, OK };
STATE State;
bool BufferedMessages;
UchMsgBuffer Buffered;
bool WaitingReply;
int InLength;
byte InType;
UchMessage* Process (UchMsgBuffer&, bool);
UchMsgStream (const UchMsgStream&);
void WriteMsg (UchMessage&);
bool ReadMsg (UchMessage&);
public:
UchMsgStream (UchAddress* = 0, UchAddress* = 0);
~UchMsgStream ();
UchChannel* Copy () const;
void HandleRead ();
bool HandleSelect ();
virtual UchMessage* DecodeMessage (UchMsgBuffer&);
virtual UchMessage* DecodeAnswer (UchMsgBuffer&);
void Send (UchMessage&, bool = false);
UchMessage* Ask (UchMessage&);
void Reply (UchMessage&);
void Send (UchMsgBuffer&, bool = false);
};
#endif /* MsgStream_H_ */
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