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/* $OpenBSD: schedule.c,v 1.8 2016/01/07 14:37:51 mestre Exp $ */
/* $NetBSD: schedule.c,v 1.3 1995/04/22 10:59:23 cgd Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <err.h>
#include <math.h>
#include <stdio.h>
#include "trek.h"
/*
** SCHEDULE AN EVENT
**
** An event of type 'type' is scheduled for time NOW + 'offset'
** into the first available slot. 'x', 'y', and 'z' are
** considered the attributes for this event.
**
** The address of the slot is returned.
*/
struct event *
schedule(int type, double offset, int x, int y, int z)
{
struct event *e;
int i;
double date;
date = Now.date + offset;
for (i = 0; i < MAXEVENTS; i++)
{
e = &Event[i];
if (e->evcode)
continue;
/* got a slot */
# ifdef xTRACE
if (Trace)
printf("schedule: type %d @ %.2f slot %d parm %d %d %d\n",
type, date, i, x, y, z);
# endif
e->evcode = type;
e->date = date;
e->x = x;
e->y = y;
e->systemname = z;
Now.eventptr[type & E_EVENT] = e;
return (e);
}
errx(1, "Cannot schedule event %d parm %d %d %d", type, x, y, z);
}
/*
** RESCHEDULE AN EVENT
**
** The event pointed to by 'e' is rescheduled to the current
** time plus 'offset'.
*/
void
reschedule(struct event *e1, double offset)
{
double date;
struct event *e;
e = e1;
date = Now.date + offset;
e->date = date;
# ifdef xTRACE
if (Trace)
printf("reschedule: type %d parm %d %d %d @ %.2f\n",
e->evcode, e->x, e->y, e->systemname, date);
# endif
return;
}
/*
** UNSCHEDULE AN EVENT
**
** The event at slot 'e' is deleted.
*/
void
unschedule(struct event *e1)
{
struct event *e;
e = e1;
# ifdef xTRACE
if (Trace)
printf("unschedule: type %d @ %.2f parm %d %d %d\n",
e->evcode, e->date, e->x, e->y, e->systemname);
# endif
Now.eventptr[e->evcode & E_EVENT] = 0;
e->date = 1e50;
e->evcode = 0;
return;
}
/*
** Abreviated schedule routine
**
** Parameters are the event index and a factor for the time
** figure.
*/
struct event *
xsched(int ev1, int factor, int x, int y, int z)
{
int ev;
ev = ev1;
return (schedule(ev, -Param.eventdly[ev] * Param.time * log(franf()) / factor, x, y, z));
}
/*
** Simplified reschedule routine
**
** Parameters are the event index, the initial date, and the
** division factor. Look at the code to see what really happens.
*/
void
xresched(struct event *e1, int ev1, int factor)
{
int ev;
struct event *e;
ev = ev1;
e = e1;
reschedule(e, -Param.eventdly[ev] * Param.time * log(franf()) / factor);
}
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