/********************************************************************
 * Tiny state machine - Version 1.1
 *
 * Developed by Flashsystems 2012-2014
 * No rights reserved.
 ********************************************************************/

/**
 * Macro for event declaration
 */
#define DECLARE_EVENTS(_MACHINENAME, ...) \
	enum SMEvents_##_MACHINENAME { __VA_ARGS__ };

/**
 * Macro for declaration of state functions and a transition handlers
 */
#define STATEFUNC(_MACHINENAME, _STATENAME) enum SMEvents_##_MACHINENAME _MACHINENAME##_##_STATENAME()

// C compilers do not know about bool so we use int
#ifdef __cplusplus
#define HANDLERFUNC(_MACHINENAME, _EVENTNAME) bool _MACHINENAME##_##_EVENTNAME()
#else
#define HANDLERFUNC(_MACHINENAME, _EVENTNAME) int _MACHINENAME##_##_EVENTNAME()
#endif

/**
 * The following macros implement the real state machine.
 * BEGIN_STATE_MACHINE: Starts the state machine declaration.
 * STATE: Declares a new state.
 * EVENT: Declares a new event that can happen for this state.
 * EVENT_WITH_HANDLER: Declares a new event that can happen and an additional transition handler for this event.
 * END_STATE: Terminates a state declaration.
 * END_STATE_MACHINE: Terminates the state machine declaration.
 */
#define BEGIN_STATE_MACHINE(_MACHINENAME, _STARTSTATE) \
	{ \
		enum SMEvents_##_MACHINENAME (*currentStateFunc)() = _MACHINENAME##_##_STARTSTATE; \
		while (1) \
		{ \
			if (0) {}

#define STATE(_MACHINENAME, _STATENAME) \
			else if (currentStateFunc == _MACHINENAME##_##_STATENAME) \
			{ \
				switch (_MACHINENAME##_##_STATENAME()) \
				{

#define EVENT(_MACHINENAME, _EVENTNAME, _STATEFUNC) \
				case _EVENTNAME: \
					currentStateFunc = _MACHINENAME##_##_STATEFUNC; \
					break;

#define EVENT_WITH_HANDLER(_MACHINENAME, _EVENTNAME, _STATEFUNC, _TRANSITION_HANDLER) \
				case _EVENTNAME: \
					if (_MACHINENAME##_##_TRANSITION_HANDLER()) \
						currentStateFunc = _MACHINENAME##_##_STATEFUNC; \
					break;

#define END_STATE() \
				default: \
					break; \
				} \
			}

#define END_STATE_MACHINE() \
		} \
	}