view rogue3/daemon.c @ 284:6376b514a30b

Fix more header-related warnings. This fixes all current default warnings with GCC7 on Linux. That does not mean the code is anywhere close to clean.
author John "Elwin" Edwards
date Fri, 22 Sep 2017 16:24:40 -0400
parents 527e2150eaf0
children
line wrap: on
line source

/*
 * Contains functions for dealing with things that happen in the
 * future.
 *
 * @(#)daemon.c	3.3 (Berkeley) 6/15/81
 *
 * Rogue: Exploring the Dungeons of Doom
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

#include "curses.h"
#include "rogue.h"

#define EMPTY 0
#define DAEMON -1
#define MAXDAEMONS 20

#define _X_ { EMPTY }

struct delayed_action d_list[MAXDAEMONS] = {
    _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
    _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, 
};

/*
 * d_slot:
 *	Find an empty slot in the daemon/fuse list
 */
struct delayed_action *
d_slot()
{
    register int i;
    register struct delayed_action *dev;

    for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
	if (dev->d_type == EMPTY)
	    return dev;
    debug("Ran out of fuse slots");
    return NULL;
}

/*
 * find_slot:
 *	Find a particular slot in the table
 */

struct delayed_action *
find_slot(void (*func)())
{
    register int i;
    register struct delayed_action *dev;

    for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
	if (dev->d_type != EMPTY && func == dev->d_func)
	    return dev;
    return NULL;
}

/*
 * daemon:
 *	Start a daemon, takes a function.
 */

void
start_daemon(void (*func)(), int arg, int type)
{
    register struct delayed_action *dev;

    dev = d_slot();
 
    if (dev != NULL) 
    {
        dev->d_type = type;
        dev->d_func = func;
        dev->d_arg = arg;
        dev->d_time = DAEMON;
    }
}

/*
 * kill_daemon:
 *	Remove a daemon from the list
 */

void
kill_daemon(void (*func)())
{
    register struct delayed_action *dev;

    if ((dev = find_slot(func)) == NULL)
	return;
    /*
     * Take it out of the list
     */
    dev->d_type = EMPTY;
}

/*
 * do_daemons:
 *	Run all the daemons that are active with the current flag,
 *	passing the argument to the function.
 */

void
do_daemons(int flag)
{
    register struct delayed_action *dev;

    /*
     * Loop through the devil list
     */
    for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
	/*
	 * Executing each one, giving it the proper arguments
	 */
	if (dev->d_type == flag && dev->d_time == DAEMON)
	    (*dev->d_func)(dev->d_arg);
}

/*
 * fuse:
 *	Start a fuse to go off in a certain number of turns
 */

void
fuse(void (*func)(), int arg, int time, int type)
{
    register struct delayed_action *wire;

    wire = d_slot();

    if (wire != NULL)
    {
        wire->d_type = type;
        wire->d_func = func;
        wire->d_arg = arg;
        wire->d_time = time;
    }
}

/*
 * lengthen:
 *	Increase the time until a fuse goes off
 */

void
lengthen(void (*func)(), int xtime)
{
    register struct delayed_action *wire;

    if ((wire = find_slot(func)) == NULL)
	return;
    wire->d_time += xtime;
}

/*
 * extinguish:
 *	Put out a fuse
 */

void
extinguish(void (*func)())
{
    register struct delayed_action *wire;

    if ((wire = find_slot(func)) == NULL)
	return;
    wire->d_type = EMPTY;
}

/*
 * do_fuses:
 *	Decrement counters and start needed fuses
 */

void
do_fuses(int flag)
{
    register struct delayed_action *wire;

    /*
     * Step though the list
     */
    for (wire = d_list; wire <= &d_list[MAXDAEMONS-1]; wire++)
    {
	/*
	 * Decrementing counters and starting things we want.  We also need
	 * to remove the fuse from the list once it has gone off.
	 */
	if (flag == wire->d_type && wire->d_time > 0 && --wire->d_time == 0)
	{
	    wire->d_type = EMPTY;
	    (*wire->d_func)(wire->d_arg);
	}
     }
}