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49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
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/*****************************************************************************
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* Product: Generic State-Table event processor
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* Date of the Last Update: Oct 22, 2007
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*
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* Copyright (C) 2002-2007 Miro Samek. All rights reserved.
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*
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* Contact information:
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* e-mail: miro@quantum-leaps.com
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*****************************************************************************/
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#include "bsp.h" /* for the C99-standard exact-width integer types */
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#include "statetbl.h"
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/* see also embedded-systems-friendly assertions in Chapter 6 */
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#include <assert.h>
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/*..........................................................................*/
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void StateTable_ctor(StateTable *me,
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Tran const *table, uint8_t n_states, uint8_t n_signals,
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Tran initial)
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{
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me->state_table = table;
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me->n_states = n_states;
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me->n_signals = n_signals;
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me->initial = initial;
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}
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/*..........................................................................*/
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void StateTable_init(StateTable *me) {
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me->state = me->n_states;
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(*me->initial)(me, (Event *)0); /* top-most initial transition */
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assert(me->state < me->n_states);/* the initial tran. must change state */
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}
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/*..........................................................................*/
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void StateTable_dispatch(StateTable *me, Event const *e) {
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Tran t;
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assert(e->sig < me->n_signals); /* require the signal in range */
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t = me->state_table[me->state*me->n_signals + e->sig];
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(*t)(me, e); /* execute the transition function */
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assert(me->state < me->n_states); /* ensure that state stays in range */
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}
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/*..........................................................................*/
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void StateTable_empty(StateTable *me, Event const *e) {
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(void)me; /* void compiler warning about unused parameter */
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(void)e; /* void compiler warning about unused parameter */
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}
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