xref: /aoo42x/main/autodoc/source/parser/inc/tokens/tkpstama.hxx (revision 1c78a5d6)

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#ifndef ADC_TKPSTAMA_HXX
#define ADC_TKPSTAMA_HXX

// USED SERVICES
	// BASE CLASSES
#include <tokens/tkpcontx.hxx>
	// COMPONENTS
#include <tokens/stmstarr.hxx>
#include <tokens/stmstfin.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.

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


**/
class StateMachine
{
	public:
		// Types
		typedef StmStatus::Branch	Branch;
		typedef StmStatus * *		StatusList;

	//# Interface self
		// LIFECYCLE
						StateMachine(
							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 StmStatus *	let_dpStatus);
		/// @#AddToken
		void			AddToken(
							const char *		in_sToken,
							TextToken::F_CRTOK	in_fTokenCreateFunction,
							const INT16 *		in_aBranches,
							INT16				in_nBoundsStatus );
						~StateMachine();


		// OPERATIONS
		StmBoundsStatus &
						GetCharChain(
							TextToken::F_CRTOK &
												o_nTokenCreateFunction,
							CharacterSource &	io_rText );
	private:
		// SERVICE FUNCTIONS
		StmStatus &		Status(
							intt			in_nStatusNr) const;
		StmArrayStatus &
						CurrentStatus() const;
		StmBoundsStatus *
						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