qhsm_in.c

Go to the documentation of this file.

/*****************************************************************************
* Product: QEP/C
* Last Updated for Version: 4.0.02
* Date of the Last Update:  Oct 27, 2008
*
*                    Q u a n t u m     L e a P s
*                    ---------------------------
*                    innovating embedded systems
*
* Copyright (C) 2002-2008 Quantum Leaps, LLC. All rights reserved.
*
* This software may be distributed and modified under the terms of the GNU
* General Public License version 2 (GPL) as published by the Free Software
* Foundation and appearing in the file GPL.TXT included in the packaging of
* this file. Please note that GPL Section 2[b] requires that all works based
* on this software must also be made publicly available under the terms of
* the GPL ("Copyleft").
*
* Alternatively, this software may be distributed and modified under the
* terms of Quantum Leaps commercial licenses, which expressly supersede
* the GPL and are specifically designed for licensees interested in
* retaining the proprietary status of their code.
*
* Contact information:
* Quantum Leaps Web site:  http://www.quantum-leaps.com
* e-mail:                  info@quantum-leaps.com
*****************************************************************************/
#include "qep_pkg.h"

/*..........................................................................*/
uint8_t QHsm_isIn(QHsm *me, QStateHandler state) {
    QStateHandler s = me->state;
    QState r;
    uint8_t inState = (uint8_t)0; /* assume that this HSM is not in 'state' */
    do {
        if (me->state == state) {                   /* do the states match? */
            inState = (uint8_t)1;               /* match found, return TRUE */
            r = Q_RET_IGNORED;                     /* break out of the loop */
        }
        else {
            r = QEP_TRIG_(me->state, QEP_EMPTY_SIG_);
        }
    } while (r != Q_RET_IGNORED);             /* QHsm_top state not reached */
    me->state = s;                            /* restore the original state */
    return inState;                                    /* return the status */
}