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/*
* SPDX-FileCopyrightText: Copyright (C) 1987, 1988 Chuck Simmons
* SPDX-License-Identifier: GPL-2.0+
*
* See the file COPYING, distributed with empire, for restriction
* and warranty information.
*/
/*
main.c -- parse command line for empire
options:
-w water: percentage of map that is water. Must be in the range
10..90. Default is 70.
-s smooth: amount of smoothing performed to generate map. Must
be a nonnegative integer. Default is 5.
-d delay: number of milliseconds to delay between output.
default is 2000 (2 seconds).
-S saveinterval: sets turn interval between saves.
default is 10
*/
#include "empire.h"
#include "extern.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define OPTFLAGS "w:s:d:S:f:"
int main(int argc, char *argv[]) {
int c;
extern char *optarg;
extern int optind;
int errflg = 0;
int wflg, sflg, dflg, Sflg;
int land;
wflg = 70; /* set defaults */
sflg = 5;
dflg = 2000;
Sflg = 10;
game.savefile = "empsave.dat";
/*
* extract command line options
*/
while ((c = getopt(argc, argv, OPTFLAGS)) != EOF) {
switch (c) {
case 'w':
wflg = atoi(optarg);
break;
case 's':
sflg = atoi(optarg);
break;
case 'd':
dflg = atoi(optarg);
break;
case 'S':
Sflg = atoi(optarg);
break;
case 'f':
game.savefile = optarg;
break;
case '?': /* illegal option? */
errflg++;
break;
}
}
if (errflg || (argc - optind) != 0) {
(void)printf("empire: usage: empire [-w water] [-s smooth] [-d "
"delay]\n");
exit(1);
}
if (wflg < 10 || wflg > 90) {
(void)printf(
"empire: -w argument must be in the range 0..90.\n");
exit(1);
}
if (sflg < 0) {
(void)printf(
"empire: -s argument must be greater or equal to zero.\n");
exit(1);
}
if (dflg < 0 || dflg > 30000) {
(void)printf(
"empire: -d argument must be in the range 0..30000.\n");
exit(1);
}
game.SMOOTH = sflg;
game.WATER_RATIO = wflg;
game.delay_time = dflg;
game.save_interval = Sflg;
/* compute min distance between cities */
land = MAP_SIZE * (100 - game.WATER_RATIO) / 100; /* available land */
land /= NUM_CITY; /* land per city */
game.MIN_CITY_DIST = isqrt(land); /* distance between cities */
empire(); /* call main routine */
return (0);
}
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