/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/


#ifndef _SBIOSYS_HXX
#define _SBIOSYS_HXX

#include <tools/stream.hxx>
#ifndef _SBERRORS_HXX
#include <basic/sberrors.hxx>
#endif

class SvStream;

// Zur Zeit sind globale Dateien (Kanalnummern 256 bis 511)
// nicht implementiert.

#define CHANNELS 256
#define CONSOLE  0

#define	SBSTRM_INPUT	0x0001		// Input
#define	SBSTRM_OUTPUT	0x0002		// Output
#define	SBSTRM_RANDOM	0x0004		// Random
#define	SBSTRM_APPEND	0x0008		// Append
#define	SBSTRM_BINARY	0x0010		// Binary

class SbiStream {
	SvStream* pStrm;				// der Stream
	sal_uIntPtr  nExpandOnWriteTo;		// bei Schreibzugriff, den Stream
									// bis zu dieser Groesse aufblasen
	ByteString aLine;				// aktuelle Zeile
	sal_uIntPtr  nLine;					// aktuelle Zeilennummer
	short  nLen;	 				// Pufferlaenge
	short  nMode;					// Bits:
	short  nChan;					// aktueller Kanal
	SbError nError;					// letzter Fehlercode
	void   MapError();				// Fehlercode mappen

public:
	SbiStream();
   ~SbiStream();
	SbError Open( short, const ByteString&, short, short, short );
	SbError Close();
	SbError Read( ByteString&, sal_uInt16 = 0, bool bForceReadingPerByte=false );
	SbError Read( char& );
	SbError Write( const ByteString&, sal_uInt16 = 0 );

	bool IsText() const		{ return (nMode & SBSTRM_BINARY) == 0; }
	bool IsRandom() const	{ return (nMode & SBSTRM_RANDOM) != 0; }
	bool IsBinary() const	{ return (nMode & SBSTRM_BINARY) != 0; }
	bool IsSeq() const		{ return (nMode & SBSTRM_RANDOM) == 0; }
	bool IsAppend() const	{ return (nMode & SBSTRM_APPEND) != 0; }
	short GetBlockLen() const 		   { return nLen; 			}
	short GetMode() const 			   { return nMode; 			}
	sal_uIntPtr GetLine() const			   { return nLine;			}
	void SetExpandOnWriteTo( sal_uIntPtr n ) { nExpandOnWriteTo = n;	}
	void ExpandFile();
	SvStream* GetStrm() 			   { return pStrm; 		   	}
};

class SbiIoSystem {
	SbiStream* pChan[ CHANNELS ];
	ByteString	aPrompt;			// Input-Prompt
	ByteString	aIn, aOut;	  		// Console-Buffer
	short     nChan;				// aktueller Kanal
	SbError	  nError;				// letzter Fehlercode
	void	  ReadCon( ByteString& );
	void	  WriteCon( const ByteString& );
public:
	SbiIoSystem();
   ~SbiIoSystem();
	SbError GetError();
	void  Shutdown();
	void  SetPrompt( const ByteString& r ) { aPrompt = r; }
	void  SetChannel( short n  )	   { nChan = n;   }
	short GetChannel() const		   { return nChan;}
	void  ResetChannel() 			   { nChan = 0;   }
	void  Open( short, const ByteString&, short, short, short );
	void  Close();
	void  Read( ByteString&, short = 0 );
	char  Read();
	void  Write( const ByteString&, short = 0 );
	short NextChannel();
	// 0 == bad channel or no SvStream (nChannel=0..CHANNELS-1)
	SbiStream* GetStream( short nChannel ) const;
	void  CloseAll(); // JSM
};

#endif