NetBSD/games/adventure/wizard.c

/*	$NetBSD: wizard.c,v 1.17 2021/05/02 12:50:43 rillig Exp $	*/

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * The game adventure was originally written in Fortran by Will Crowther
 * and Don Woods.  It was later translated to C and enhanced by Jim
 * Gillogly.  This code is derived from software contributed to Berkeley
 * by Jim Gillogly at The Rand Corporation.
 *
 * 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 <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)wizard.c	8.1 (Berkeley) 6/2/93";
#else
__RCSID("$NetBSD: wizard.c,v 1.17 2021/05/02 12:50:43 rillig Exp $");
#endif
#endif				/* not lint */

/*      Re-coding of advent in C: privileged operations                 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include "hdr.h"
#include "extern.h"

static int wizard(void);

void
datime(int *d, int *t)
{
	time_t  tvec;
	struct tm *tptr;

	time(&tvec);
	tptr = localtime(&tvec);
	/* day since 1977  (mod leap)   */
	*d = (tptr->tm_yday + 365 * (tptr->tm_year - 77)
             + (tptr->tm_year - 77) / 4 - (tptr->tm_year - 1) / 100
             + (tptr->tm_year + 299) / 400);
	/* bug: this will overflow in the year 2066 AD (with 16 bit int) */
	/* it will be attributed to Wm the C's millenial celebration    */
	/* and minutes since midnite */
	*t = tptr->tm_hour * 60 + tptr->tm_min;
}				/* pretty painless              */


static char magic[6];

void
poof(void)
{
	strcpy(magic, DECR('d', 'w', 'a', 'r', 'f'));
	latency = 45;
}

int
Start(void)
{
	int     d, t, delay;

	datime(&d, &t);
	delay = (d - saveday) * 1440 + (t - savet);	/* good for about a
							 * month     */

	if (delay >= latency) {
		saved = -1;
		return (FALSE);
	}
	printf("This adventure was suspended a mere %d minute%s ago.",
	    delay, delay == 1 ? "" : "s");
	if (delay <= latency / 3) {
		mspeak(2);
		exit(0);
	}
	mspeak(8);
	if (!wizard()) {
		mspeak(9);
		exit(0);
	}
	saved = -1;
	return (FALSE);
}

/* not as complex as advent/10 (for now)        */
static int
wizard(void)
{
	char   *word, *x;
	if (!yesm(16, 0, 7))
		return (FALSE);
	mspeak(17);
	getin(&word, &x);
	if (!weq(word, magic)) {
		mspeak(20);
		return (FALSE);
	}
	mspeak(19);
	return (TRUE);
}

void
ciao(void)
{
	char fname[80];
	size_t pos;

	printf("What would you like to call the saved version?\n");
	/* XXX - should use fgetln to avoid arbitrary limit */
	for (pos = 0; pos < sizeof(fname) - 1; pos++) {
		int ch;
		ch = getchar();
		if (ch == '\n' || ch == EOF)
			break;
		fname[pos] = ch;
	}
	fname[pos] = '\0';
	if (save(fname) != 0)
		return;		/* Save failed */
	printf("To resume, say \"adventure %s\".\n", fname);
	printf("\"With these rooms I might now have been familiarly ");
	printf("acquainted.\"\n");
	exit(0);
}


int
ran(int range)
{
	long    i;

	i = rand() % range;
	return (i);
}