#ifndef _dryos_state_object_h_
#define _dryos_state_object_h_

/** \file
 * DryOS finite-state machine objects.
 */

#include "arm-mcr.h"

/** State objects.
 *
 * Size 0x20
 */
typedef struct state_object * (*state_function_t)(
	void *			arg1,
	void *			arg2,
	void *			arg3
);

struct state_callback
{
	uint32_t		next_state;
	state_function_t	handler;
};


struct state_object
{
	const char *		type;		// off 0x00, "StateObject" 
	const char *		name;		// off 0x04, arg 0
	uint32_t		auto_sequence;	// off 0x08, arg 1

	// off 0x0c, always 0xff99a228 ?
	void			(*callback)(
		struct state_object *	self,
		void *			arg1,
		uint32_t		input,
		void *			arg3,
		void *			arg4
	);

	// Points to an array of size [max_inputs][max_states]
	struct state_callback *	callbacks;	// off 0x10
	uint32_t		max_inputs;	// off 0x14, arg 2
	uint32_t		max_states;	// off 0x18, arg 3
	uint32_t		state;		// off 0x1c, initially 0
};

SIZE_CHECK_STRUCT( state_object, 0x20 );


extern struct state_object *
state_object_create(
	const char *		name,
	int			auto_sequence,
	state_function_t *	callbacks,
	int			max_inputs,
	int			max_states
);


extern void
state_object_dispatchc(
	struct state_object *	self,
	int			input,
	int			arg0,
	int			arg1,
	int			arg2
);


#endif