1000 lines
20 KiB
C
1000 lines
20 KiB
C
/* $NetBSD: snake.c,v 1.28 2012/06/19 05:46:09 dholland Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)snake.c 8.2 (Berkeley) 1/7/94";
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#else
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__RCSID("$NetBSD: snake.c,v 1.28 2012/06/19 05:46:09 dholland Exp $");
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#endif
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#endif /* not lint */
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/*
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* snake - crt hack game.
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*
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* You move around the screen with arrow keys trying to pick up money
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* without getting eaten by the snake. hjkl work as in vi in place of
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* arrow keys. You can leave at the exit any time.
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*
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* compile as follows:
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* cc -O snake.c move.c -o snake -lm -ltermlib
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*/
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#include <sys/param.h>
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#include <curses.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <err.h>
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#include <math.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include "pathnames.h"
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#define cashvalue chunk*(loot-penalty)/25
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struct point {
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int col, line;
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};
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#define same(s1, s2) ((s1)->line == (s2)->line && (s1)->col == (s2)->col)
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#define PENALTY 10 /* % penalty for invoking spacewarp */
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#define EOT '\004'
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#define LF '\n'
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#define DEL '\177'
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#define ME 'I'
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#define SNAKEHEAD 'S'
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#define SNAKETAIL 's'
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#define TREASURE '$'
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#define GOAL '#'
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#define pchar(point, c) mvaddch((point)->line + 1, (point)->col + 1, (c))
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#define delay(t) usleep(t * 50000);
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static struct point you;
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static struct point money;
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static struct point finish;
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static struct point snake[6];
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static int loot, penalty;
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static int moves;
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static int fast = 1;
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static int rawscores;
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static FILE *logfile;
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static int lcnt, ccnt; /* user's idea of screen size */
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static int chunk; /* amount of money given at a time */
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static void chase(struct point *, struct point *);
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static int chk(const struct point *);
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static void drawbox(void);
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static void flushi(void);
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static void length(int);
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static void logit(const char *);
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static void mainloop(void) __dead;
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static struct point *point(struct point *, int, int);
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static int post(int, int);
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static int pushsnake(void);
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static void setup(void);
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static void snap(void);
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static void snrand(struct point *);
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static void spacewarp(int);
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static void stop(int) __dead;
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static int stretch(const struct point *);
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static void surround(struct point *);
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static void suspend(void);
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static void win(const struct point *);
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static void winnings(int);
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int
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main(int argc, char **argv)
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{
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int ch, i;
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time_t tv;
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/* Open score files then revoke setgid privileges */
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rawscores = open(_PATH_RAWSCORES, O_RDWR|O_CREAT, 0664);
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if (rawscores < 0) {
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warn("open %s", _PATH_RAWSCORES);
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sleep(2);
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} else if (rawscores < 3)
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exit(1);
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logfile = fopen(_PATH_LOGFILE, "a");
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if (logfile == NULL) {
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warn("fopen %s", _PATH_LOGFILE);
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sleep(2);
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}
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setgid(getgid());
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(void) time(&tv);
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while ((ch = getopt(argc, argv, "l:w:t")) != -1)
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switch ((char) ch) {
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#ifdef DEBUG
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case 'd':
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tv = atol(optarg);
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break;
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#endif
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case 'w': /* width */
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ccnt = atoi(optarg);
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break;
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case 'l': /* length */
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lcnt = atoi(optarg);
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break;
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case 't':
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fast = 0;
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break;
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case '?':
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default:
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#ifdef DEBUG
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fprintf(stderr,
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"usage: %s [-d seed] [-w width] [-l length] [-t]\n",
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getprogname());
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#else
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fprintf(stderr,
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"usage: %s [-w width] [-l length] [-t]\n",
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getprogname());
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#endif
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exit(1);
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}
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srandom((int) tv);
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penalty = loot = 0;
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if (!initscr())
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errx(0, "couldn't initialize screen");;
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cbreak();
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noecho();
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#ifdef KEY_LEFT
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keypad(stdscr, TRUE);
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#endif
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if (!lcnt || lcnt > LINES - 2)
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lcnt = LINES - 2;
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if (!ccnt || ccnt > COLS - 2)
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ccnt = COLS - 2;
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i = MIN(lcnt, ccnt);
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if (i < 4) {
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endwin();
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errx(1, "screen too small for a fair game.");
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}
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/*
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* chunk is the amount of money the user gets for each $.
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* The formula below tries to be fair for various screen sizes.
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* We only pay attention to the smaller of the 2 edges, since
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* that seems to be the bottleneck.
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* This formula is a hyperbola which includes the following points:
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* (24, $25) (original scoring algorithm)
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* (12, $40) (experimentally derived by the "feel")
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* (48, $15) (a guess)
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* This will give a 4x4 screen $99/shot. We don't allow anything
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* smaller than 4x4 because there is a 3x3 game where you can win
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* an infinite amount of money.
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*/
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if (i < 12)
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i = 12; /* otherwise it isn't fair */
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/*
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* Compensate for border. This really changes the game since
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* the screen is two squares smaller but we want the default
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* to be $25, and the high scores on small screens were a bit
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* much anyway.
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*/
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i += 2;
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chunk = (675.0 / (i + 6)) + 2.5; /* min screen edge */
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signal(SIGINT, stop);
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snrand(&finish);
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snrand(&you);
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snrand(&money);
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snrand(&snake[0]);
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for (i = 1; i < 6; i++)
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chase(&snake[i], &snake[i - 1]);
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setup();
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mainloop();
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/* NOTREACHED */
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return (0);
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}
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static struct point *
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point(struct point *ps, int x, int y)
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{
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ps->col = x;
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ps->line = y;
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return (ps);
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}
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/* Main command loop */
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static void
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mainloop(void)
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{
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int k;
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int repeat = 1;
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int lastc = 0;
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for (;;) {
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int c;
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/* Highlight you, not left & above */
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move(you.line + 1, you.col + 1);
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refresh();
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if (((c = getch()) <= '9') && (c >= '0')) {
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repeat = c - '0';
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while (((c = getch()) <= '9') && (c >= '0'))
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repeat = 10 * repeat + (c - '0');
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} else {
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if (c != '.')
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repeat = 1;
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}
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if (c == '.') {
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c = lastc;
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}
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if (!fast)
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flushi();
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lastc = c;
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switch (c) {
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case CTRL('z'):
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suspend();
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continue;
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case EOT:
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case 'x':
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case 0177: /* del or end of file */
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endwin();
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length(moves);
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logit("quit");
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exit(0);
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case CTRL('l'):
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setup();
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winnings(cashvalue);
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continue;
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case 'p':
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case 'd':
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snap();
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continue;
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case 'w':
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spacewarp(0);
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continue;
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case 'A':
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repeat = you.col;
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c = 'h';
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break;
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case 'H':
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case 'S':
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repeat = you.col - money.col;
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c = 'h';
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break;
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case 'T':
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repeat = you.line;
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c = 'k';
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break;
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case 'K':
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case 'E':
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repeat = you.line - money.line;
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c = 'k';
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break;
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case 'P':
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repeat = ccnt - 1 - you.col;
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c = 'l';
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break;
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case 'L':
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case 'F':
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repeat = money.col - you.col;
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c = 'l';
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break;
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case 'B':
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repeat = lcnt - 1 - you.line;
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c = 'j';
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break;
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case 'J':
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case 'C':
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repeat = money.line - you.line;
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c = 'j';
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break;
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}
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for (k = 1; k <= repeat; k++) {
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moves++;
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switch (c) {
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case 's':
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case 'h':
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#ifdef KEY_LEFT
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case KEY_LEFT:
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#endif
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case '\b':
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if (you.col > 0) {
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if ((fast) || (k == 1))
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pchar(&you, ' ');
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you.col--;
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if ((fast) || (k == repeat) ||
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(you.col == 0))
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pchar(&you, ME);
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}
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break;
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case 'f':
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case 'l':
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#ifdef KEY_RIGHT
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case KEY_RIGHT:
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#endif
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case ' ':
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if (you.col < ccnt - 1) {
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if ((fast) || (k == 1))
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pchar(&you, ' ');
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you.col++;
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if ((fast) || (k == repeat) ||
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(you.col == ccnt - 1))
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pchar(&you, ME);
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}
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break;
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case CTRL('p'):
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case 'e':
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case 'k':
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#ifdef KEY_UP
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case KEY_UP:
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#endif
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case 'i':
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if (you.line > 0) {
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if ((fast) || (k == 1))
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pchar(&you, ' ');
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you.line--;
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if ((fast) || (k == repeat) ||
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(you.line == 0))
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pchar(&you, ME);
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}
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break;
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case CTRL('n'):
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case 'c':
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case 'j':
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#ifdef KEY_DOWN
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case KEY_DOWN:
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#endif
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case LF:
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case 'm':
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if (you.line + 1 < lcnt) {
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if ((fast) || (k == 1))
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pchar(&you, ' ');
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you.line++;
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if ((fast) || (k == repeat) ||
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(you.line == lcnt - 1))
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pchar(&you, ME);
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}
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break;
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}
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if (same(&you, &money)) {
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loot += 25;
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if (k < repeat)
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pchar(&you, ' ');
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do {
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snrand(&money);
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} while ((money.col == finish.col &&
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money.line == finish.line) ||
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(money.col < 5 && money.line == 0) ||
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(money.col == you.col &&
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money.line == you.line));
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pchar(&money, TREASURE);
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winnings(cashvalue);
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continue;
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}
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if (same(&you, &finish)) {
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win(&finish);
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flushi();
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endwin();
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printf("You have won with $%d.\n", cashvalue);
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fflush(stdout);
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logit("won");
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post(cashvalue, 1);
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length(moves);
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exit(0);
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}
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if (pushsnake())
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break;
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}
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}
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}
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/*
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* setup the board
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*/
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static void
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setup(void)
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{
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int i;
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erase();
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pchar(&you, ME);
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pchar(&finish, GOAL);
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pchar(&money, TREASURE);
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for (i = 1; i < 6; i++) {
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pchar(&snake[i], SNAKETAIL);
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}
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pchar(&snake[0], SNAKEHEAD);
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drawbox();
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refresh();
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}
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static void
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drawbox(void)
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{
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int i;
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for (i = 1; i <= ccnt; i++) {
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mvaddch(0, i, '-');
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mvaddch(lcnt + 1, i, '-');
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}
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for (i = 0; i <= lcnt + 1; i++) {
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mvaddch(i, 0, '|');
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mvaddch(i, ccnt + 1, '|');
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}
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}
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static void
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snrand(struct point *sp)
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{
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struct point p;
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int i;
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for (;;) {
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p.col = random() % ccnt;
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p.line = random() % lcnt;
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/* make sure it's not on top of something else */
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if (p.line == 0 && p.col < 5)
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continue;
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if (same(&p, &you))
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continue;
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if (same(&p, &money))
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continue;
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if (same(&p, &finish))
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continue;
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for (i = 0; i < 6; i++)
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if (same(&p, &snake[i]))
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break;
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if (i < 6)
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continue;
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break;
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}
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*sp = p;
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}
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static int
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post(int iscore, int flag)
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{
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short score = iscore;
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short uid;
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short oldbest = 0;
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short allbwho = 0, allbscore = 0;
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struct passwd *p;
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/* I want to printf() the scores for terms that clear on cook(),
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* but this routine also gets called with flag == 0 to see if
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* the snake should wink. If (flag) then we're at game end and
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* can printf.
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*/
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/*
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* Neg uid, 0, and 1 cannot have scores recorded.
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*/
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if ((uid = getuid()) <= 1) {
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if (flag)
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printf("No saved scores for uid %d.\n", uid);
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return (1);
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}
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if (rawscores < 0) {
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/* Error reported earlier */
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return (1);
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}
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/* Figure out what happened in the past */
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read(rawscores, &allbscore, sizeof(short));
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read(rawscores, &allbwho, sizeof(short));
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lseek(rawscores, uid * sizeof(short), SEEK_SET);
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read(rawscores, &oldbest, sizeof(short));
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if (!flag) {
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lseek(rawscores, 0, SEEK_SET);
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return (score > oldbest ? 1 : 0);
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}
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/* Update this jokers best */
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if (score > oldbest) {
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lseek(rawscores, uid * sizeof(short), SEEK_SET);
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write(rawscores, &score, sizeof(short));
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printf("You bettered your previous best of $%d\n", oldbest);
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} else
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printf("Your best to date is $%d\n", oldbest);
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/* See if we have a new champ */
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p = getpwuid(allbwho);
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if (score > allbscore) {
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lseek(rawscores, 0, SEEK_SET);
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write(rawscores, &score, sizeof(short));
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write(rawscores, &uid, sizeof(short));
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if (allbwho) {
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if (p)
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printf("You beat %s's old record of $%d!\n",
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p->pw_name, allbscore);
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else
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printf("You beat (%d)'s old record of $%d!\n",
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(int)allbwho, allbscore);
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}
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else
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printf("You set a new record!\n");
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} else if (p)
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printf("The highest is %s with $%d\n", p->pw_name, allbscore);
|
|
else
|
|
printf("The highest is (%d) with $%d\n", (int)allbwho,
|
|
allbscore);
|
|
lseek(rawscores, 0, SEEK_SET);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Flush typeahead to keep from buffering a bunch of chars and then
|
|
* overshooting. This loses horribly at 9600 baud, but works nicely
|
|
* if the terminal gets behind.
|
|
*/
|
|
static void
|
|
flushi(void)
|
|
{
|
|
tcflush(0, TCIFLUSH);
|
|
}
|
|
|
|
static const int mx[8] = {
|
|
0, 1, 1, 1, 0, -1, -1, -1
|
|
};
|
|
static const int my[8] = {
|
|
-1, -1, 0, 1, 1, 1, 0, -1
|
|
};
|
|
static const float absv[8] = {
|
|
1, 1.4, 1, 1.4, 1, 1.4, 1, 1.4
|
|
};
|
|
static int oldw = 0;
|
|
|
|
static void
|
|
chase(struct point *np, struct point *sp)
|
|
{
|
|
/* this algorithm has bugs; otherwise the snake would get too good */
|
|
struct point d;
|
|
int w, i, wt[8];
|
|
double v1, v2, vp, max;
|
|
point(&d, you.col - sp->col, you.line - sp->line);
|
|
v1 = sqrt((double) (d.col * d.col + d.line * d.line));
|
|
w = 0;
|
|
max = 0;
|
|
for (i = 0; i < 8; i++) {
|
|
vp = d.col * mx[i] + d.line * my[i];
|
|
v2 = absv[i];
|
|
if (v1 > 0)
|
|
vp = ((double) vp) / (v1 * v2);
|
|
else
|
|
vp = 1.0;
|
|
if (vp > max) {
|
|
max = vp;
|
|
w = i;
|
|
}
|
|
}
|
|
for (i = 0; i < 8; i++) {
|
|
point(&d, sp->col + mx[i], sp->line + my[i]);
|
|
wt[i] = 0;
|
|
if (d.col < 0 || d.col >= ccnt || d.line < 0 || d.line >= lcnt)
|
|
continue;
|
|
/*
|
|
* Change to allow snake to eat you if you're on the money,
|
|
* otherwise, you can just crouch there until the snake goes
|
|
* away. Not positive it's right.
|
|
*
|
|
* if (d.line == 0 && d.col < 5) continue;
|
|
*/
|
|
if (same(&d, &money))
|
|
continue;
|
|
if (same(&d, &finish))
|
|
continue;
|
|
wt[i] = i == w ? loot / 10 : 1;
|
|
if (i == oldw)
|
|
wt[i] += loot / 20;
|
|
}
|
|
for (w = i = 0; i < 8; i++)
|
|
w += wt[i];
|
|
vp = ((random() >> 6) & 01777) % w;
|
|
for (i = 0; i < 8; i++)
|
|
if (vp < wt[i])
|
|
break;
|
|
else
|
|
vp -= wt[i];
|
|
if (i == 8) {
|
|
printw("failure\n");
|
|
i = 0;
|
|
while (wt[i] == 0)
|
|
i++;
|
|
}
|
|
oldw = w = i;
|
|
point(np, sp->col + mx[w], sp->line + my[w]);
|
|
}
|
|
|
|
static void
|
|
spacewarp(int w)
|
|
{
|
|
struct point p;
|
|
int j;
|
|
const char *str;
|
|
|
|
snrand(&you);
|
|
point(&p, COLS / 2 - 8, LINES / 2 - 1);
|
|
if (p.col < 0)
|
|
p.col = 0;
|
|
if (p.line < 0)
|
|
p.line = 0;
|
|
if (w) {
|
|
str = "BONUS!!!";
|
|
loot = loot - penalty;
|
|
penalty = 0;
|
|
} else {
|
|
str = "SPACE WARP!!!";
|
|
penalty += loot / PENALTY;
|
|
}
|
|
for (j = 0; j < 3; j++) {
|
|
erase();
|
|
refresh();
|
|
delay(5);
|
|
mvaddstr(p.line + 1, p.col + 1, str);
|
|
refresh();
|
|
delay(10);
|
|
}
|
|
setup();
|
|
winnings(cashvalue);
|
|
}
|
|
|
|
static void
|
|
snap(void)
|
|
{
|
|
#if 0 /* This code doesn't really make sense. */
|
|
struct point p;
|
|
|
|
if (you.line < 3) {
|
|
mvaddch(1, you.col + 1, '-');
|
|
}
|
|
if (you.line > lcnt - 4) {
|
|
mvaddch(lcnt, you.col + 1, '_');
|
|
}
|
|
if (you.col < 10) {
|
|
mvaddch(you.line + 1, 1, '(');
|
|
}
|
|
if (you.col > ccnt - 10) {
|
|
mvaddch(you.line + 1, ccnt, ')');
|
|
}
|
|
#endif
|
|
if (!stretch(&money))
|
|
if (!stretch(&finish)) {
|
|
pchar(&you, '?');
|
|
refresh();
|
|
delay(10);
|
|
pchar(&you, ME);
|
|
}
|
|
#if 0
|
|
if (you.line < 3) {
|
|
point(&p, you.col, 0);
|
|
chk(&p);
|
|
}
|
|
if (you.line > lcnt - 4) {
|
|
point(&p, you.col, lcnt - 1);
|
|
chk(&p);
|
|
}
|
|
if (you.col < 10) {
|
|
point(&p, 0, you.line);
|
|
chk(&p);
|
|
}
|
|
if (you.col > ccnt - 10) {
|
|
point(&p, ccnt - 1, you.line);
|
|
chk(&p);
|
|
}
|
|
#endif
|
|
refresh();
|
|
}
|
|
|
|
static int
|
|
stretch(const struct point *ps)
|
|
{
|
|
struct point p;
|
|
|
|
point(&p, you.col, you.line);
|
|
if ((abs(ps->col - you.col) < (ccnt / 12)) && (you.line != ps->line)) {
|
|
if (you.line < ps->line) {
|
|
for (p.line = you.line + 1; p.line <= ps->line; p.line++)
|
|
pchar(&p, 'v');
|
|
refresh();
|
|
delay(10);
|
|
for (; p.line > you.line; p.line--)
|
|
chk(&p);
|
|
} else {
|
|
for (p.line = you.line - 1; p.line >= ps->line; p.line--)
|
|
pchar(&p, '^');
|
|
refresh();
|
|
delay(10);
|
|
for (; p.line < you.line; p.line++)
|
|
chk(&p);
|
|
}
|
|
return (1);
|
|
} else
|
|
if ((abs(ps->line - you.line) < (lcnt/7))
|
|
&& (you.col != ps->col)) {
|
|
p.line = you.line;
|
|
if (you.col < ps->col) {
|
|
for (p.col = you.col + 1; p.col <= ps->col; p.col++)
|
|
pchar(&p, '>');
|
|
refresh();
|
|
delay(10);
|
|
for (; p.col > you.col; p.col--)
|
|
chk(&p);
|
|
} else {
|
|
for (p.col = you.col - 1; p.col >= ps->col; p.col--)
|
|
pchar(&p, '<');
|
|
refresh();
|
|
delay(10);
|
|
for (; p.col < you.col; p.col++)
|
|
chk(&p);
|
|
}
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
surround(struct point *ps)
|
|
{
|
|
int j;
|
|
|
|
if (ps->col == 0)
|
|
ps->col++;
|
|
if (ps->line == 0)
|
|
ps->line++;
|
|
if (ps->line == LINES - 1)
|
|
ps->line--;
|
|
if (ps->col == COLS - 1)
|
|
ps->col--;
|
|
mvaddstr(ps->line, ps->col, "/*\\");
|
|
mvaddstr(ps->line + 1, ps->col, "* *");
|
|
mvaddstr(ps->line + 2, ps->col, "\\*/");
|
|
for (j = 0; j < 20; j++) {
|
|
pchar(ps, '@');
|
|
refresh();
|
|
delay(1);
|
|
pchar(ps, ' ');
|
|
refresh();
|
|
delay(1);
|
|
}
|
|
if (post(cashvalue, 0)) {
|
|
mvaddstr(ps->line, ps->col, " ");
|
|
mvaddstr(ps->line + 1, ps->col, "o.o");
|
|
mvaddstr(ps->line + 2, ps->col, "\\_/");
|
|
refresh();
|
|
delay(6);
|
|
mvaddstr(ps->line, ps->col, " ");
|
|
mvaddstr(ps->line + 1, ps->col, "o.-");
|
|
mvaddstr(ps->line + 2, ps->col, "\\_/");
|
|
refresh();
|
|
delay(6);
|
|
}
|
|
mvaddstr(ps->line, ps->col, " ");
|
|
mvaddstr(ps->line + 1, ps->col, "o.o");
|
|
mvaddstr(ps->line + 2, ps->col, "\\_/");
|
|
refresh();
|
|
delay(6);
|
|
}
|
|
|
|
static void
|
|
win(const struct point *ps)
|
|
{
|
|
struct point x;
|
|
int j, k;
|
|
int boxsize; /* actually diameter of box, not radius */
|
|
|
|
boxsize = fast ? 10 : 4;
|
|
point(&x, ps->col, ps->line);
|
|
for (j = 1; j < boxsize; j++) {
|
|
for (k = 0; k < j; k++) {
|
|
pchar(&x, '#');
|
|
x.line--;
|
|
}
|
|
for (k = 0; k < j; k++) {
|
|
pchar(&x, '#');
|
|
x.col++;
|
|
}
|
|
j++;
|
|
for (k = 0; k < j; k++) {
|
|
pchar(&x, '#');
|
|
x.line++;
|
|
}
|
|
for (k = 0; k < j; k++) {
|
|
pchar(&x, '#');
|
|
x.col--;
|
|
}
|
|
refresh();
|
|
delay(1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
pushsnake(void)
|
|
{
|
|
int i, bonus;
|
|
int issame = 0;
|
|
struct point tmp;
|
|
|
|
/*
|
|
* My manual says times doesn't return a value. Furthermore, the
|
|
* snake should get his turn every time no matter if the user is
|
|
* on a fast terminal with typematic keys or not.
|
|
* So I have taken the call to times out.
|
|
*/
|
|
for (i = 4; i >= 0; i--)
|
|
if (same(&snake[i], &snake[5]))
|
|
issame++;
|
|
if (!issame)
|
|
pchar(&snake[5], ' ');
|
|
/* Need the following to catch you if you step on the snake's tail */
|
|
tmp.col = snake[5].col;
|
|
tmp.line = snake[5].line;
|
|
for (i = 4; i >= 0; i--)
|
|
snake[i + 1] = snake[i];
|
|
chase(&snake[0], &snake[1]);
|
|
pchar(&snake[1], SNAKETAIL);
|
|
pchar(&snake[0], SNAKEHEAD);
|
|
for (i = 0; i < 6; i++) {
|
|
if (same(&snake[i], &you) || same(&tmp, &you)) {
|
|
surround(&you);
|
|
i = (cashvalue) % 10;
|
|
bonus = ((random() >> 8) & 0377) % 10;
|
|
mvprintw(lcnt + 1, 0, "%d\n", bonus);
|
|
refresh();
|
|
delay(30);
|
|
if (bonus == i) {
|
|
spacewarp(1);
|
|
logit("bonus");
|
|
flushi();
|
|
return (1);
|
|
}
|
|
flushi();
|
|
endwin();
|
|
if (loot >= penalty) {
|
|
printf("\nYou and your $%d have been eaten\n",
|
|
cashvalue);
|
|
} else {
|
|
printf("\nThe snake ate you. You owe $%d.\n",
|
|
-cashvalue);
|
|
}
|
|
logit("eaten");
|
|
length(moves);
|
|
exit(0);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
chk(const struct point *sp)
|
|
{
|
|
int j;
|
|
|
|
if (same(sp, &money)) {
|
|
pchar(sp, TREASURE);
|
|
return (2);
|
|
}
|
|
if (same(sp, &finish)) {
|
|
pchar(sp, GOAL);
|
|
return (3);
|
|
}
|
|
if (same(sp, &snake[0])) {
|
|
pchar(sp, SNAKEHEAD);
|
|
return (4);
|
|
}
|
|
for (j = 1; j < 6; j++) {
|
|
if (same(sp, &snake[j])) {
|
|
pchar(sp, SNAKETAIL);
|
|
return (4);
|
|
}
|
|
}
|
|
if ((sp->col < 4) && (sp->line == 0)) {
|
|
winnings(cashvalue);
|
|
if ((you.line == 0) && (you.col < 4))
|
|
pchar(&you, ME);
|
|
return (5);
|
|
}
|
|
if (same(sp, &you)) {
|
|
pchar(sp, ME);
|
|
return (1);
|
|
}
|
|
pchar(sp, ' ');
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
winnings(int won)
|
|
{
|
|
if (won > 0) {
|
|
mvprintw(1, 1, "$%d", won);
|
|
}
|
|
}
|
|
|
|
static void
|
|
stop(int dummy __unused)
|
|
{
|
|
signal(SIGINT, SIG_IGN);
|
|
endwin();
|
|
length(moves);
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
suspend(void)
|
|
{
|
|
endwin();
|
|
kill(getpid(), SIGTSTP);
|
|
refresh();
|
|
winnings(cashvalue);
|
|
}
|
|
|
|
static void
|
|
length(int num)
|
|
{
|
|
printf("You made %d moves.\n", num);
|
|
}
|
|
|
|
static void
|
|
logit(const char *msg)
|
|
{
|
|
time_t t;
|
|
|
|
if (logfile != NULL) {
|
|
time(&t);
|
|
fprintf(logfile, "%s $%d %dx%d %s %s",
|
|
getlogin(), cashvalue, lcnt, ccnt, msg, ctime(&t));
|
|
fflush(logfile);
|
|
}
|
|
}
|