File:  [DragonFly] / src / games / trek / schedule.c
Revision 1.3: download - view: text, annotated - select for diffs
Thu Sep 7 21:19:44 2006 UTC (7 years, 11 months ago) by pavalos
Branches: MAIN
CVS tags: HEAD, DragonFly_RELEASE_2_0_Slip, DragonFly_RELEASE_2_0, DragonFly_RELEASE_1_8_Slip, DragonFly_RELEASE_1_8, DragonFly_RELEASE_1_12_Slip, DragonFly_RELEASE_1_12, DragonFly_RELEASE_1_10_Slip, DragonFly_RELEASE_1_10, DragonFly_Preview
WARNS6 cleanup (1803 warnings).

ANSI function declarations.

Staticize functions.

Rename local variables that shadow globals.

Use string functions from libc instead of creating our own.

Remove void casts for unchecked function returns.

Spell parameter correctly.

Don't try to return a value from void functions.

Remove compat library requirement (gtty -> ioctl).

Add new function "dowarp" that calls warp() from play.c.  (Taken from
NetBSD).

Change chars that are used for numeric values to shorts so they can be
properly used as array indexes.

/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 * @(#)schedule.c	8.1 (Berkeley) 5/31/93
 * $FreeBSD: src/games/trek/schedule.c,v 1.4 1999/11/30 03:49:53 billf Exp $
 * $DragonFly: src/games/trek/schedule.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
 */

# 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, char x, char y, char 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;
		return (e);
	}
	syserr("Cannot schedule event %d parm %d %d %d", type, x, y, z);
	/* NOTREACHED */
	return(NULL);
}


/*
**  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);
}