/**************************************************************
 * 
 * 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
 * under the License.
 * 
 *************************************************************/



#ifndef ADC_TKPSTAM2_HXX
#define ADC_TKPSTAM2_HXX

// USED SERVICES
	// BASE CLASSES
#include <tokens/tkpcont2.hxx>
	// COMPONENTS
#include <tokens/stmstar2.hxx>
#include <tokens/stmstfi2.hxx>

/**	@descr
	This state-machine models state transitions from one state to another
	per indices of branches. If the indices represent ascii-char-values,
	the state-machine can be used for recognising tokens of text.

	The state-machine can be a status itself.

	StateMachin2 needs the array-size of all stati as a guess, how many stati
	the state machine will contain, when at work.


**/
class StateMachin2
{
	public:
		// Types
		typedef StmStatu2::Branch	Branch;
		typedef StmStatu2 * *		StatusList;

	//# Interface self
		// LIFECYCLE
						StateMachin2(
							intt			in_nStatusSize,
							intt			in_nInitial_StatusListSize );	/// The user of the constructor should guess
																			///   the approximate number of stati here to
																			///	  avoid multiple reallocations.
		/// @#AddStatus
		intt			AddStatus(  	/// @return the new #Status' ID
							DYN StmStatu2 *	let_dpStatus);
		/// @#AddToken
		void			AddToken(
							const char *		in_sToken,
							UINT16				in_nTokenId,
							const INT16 *		in_aBranches,
							INT16				in_nBoundsStatus );
						~StateMachin2();

		// OPERATIONS
		StmBoundsStatu2 &
						GetCharChain(
							UINT16 &  		   	o_nTokenId,
							CharacterSource &	io_rText );
	private:
		// SERVICE FUNCTIONS
		StmStatu2 &		Status(
							intt			in_nStatusNr) const;
		StmArrayStatu2 &
						CurrentStatus() const;
		StmBoundsStatu2 *
						BoundsStatus() const;

		/// Sets the PeekedStatus.
		void			Peek(
							intt			in_nBranch);

		void			ResizeStati();		// Adds space for 32 stati.

		// DATA
		StatusList      pStati;				///	List of Status, implemented as simple C-array of length #nStatiSpace
											/// with nStatiLength valid members (beginning from zero).
		intt			nCurrentStatus;
		intt			nPeekedStatus;

		intt			nStatusSize;		/// Size of the branch array of a single status.

		intt			nNrofStati;			/// Nr of Stati so far.
		intt			nStatiSpace;        /// Size of allocated array for #pStati (size in items).
};



/**	@#AddToken
	@descr
	Adds a token, which will be recogniszeds by the
	statemachine.


**/



#endif