worm.c revision 1.8
1 /* $NetBSD: worm.c,v 1.8 1997/10/12 02:12:48 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)worm.c 8.1 (Berkeley) 5/31/93"; 45 #else 46 __RCSID("$NetBSD: worm.c,v 1.8 1997/10/12 02:12:48 lukem Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * Worm. Written by Michael Toy 52 * UCSC 53 */ 54 55 #include <ctype.h> 56 #include <curses.h> 57 #include <signal.h> 58 #include <stdlib.h> 59 #include <termios.h> 60 #include <unistd.h> 61 62 #define newlink() (struct body *) malloc(sizeof (struct body)); 63 #define HEAD '@' 64 #define BODY 'o' 65 #define LENGTH 7 66 #define RUNLEN 8 67 #define CNTRL(p) (p-'A'+1) 68 69 WINDOW *tv; 70 WINDOW *stw; 71 struct body { 72 int x; 73 int y; 74 struct body *prev; 75 struct body *next; 76 } *head, *tail, goody; 77 int growing = 0; 78 int running = 0; 79 int slow = 0; 80 int score = 0; 81 int start_len = LENGTH; 82 char lastch; 83 char outbuf[BUFSIZ]; 84 85 void crash __P((void)); 86 void display __P((struct body *, char)); 87 int main __P((int, char **)); 88 void leave __P((int)); 89 void life __P((void)); 90 void newpos __P((struct body *)); 91 void process __P((char)); 92 void prize __P((void)); 93 int rnd __P((int)); 94 void setup __P((void)); 95 void suspend __P((int)); 96 void wake __P((int)); 97 98 int 99 main(argc, argv) 100 int argc; 101 char **argv; 102 { 103 char ch; 104 105 if (argc == 2) 106 start_len = atoi(argv[1]); 107 if ((start_len <= 0) || (start_len > 500)) 108 start_len = LENGTH; 109 setbuf(stdout, outbuf); 110 srand(getpid()); 111 signal(SIGALRM, wake); 112 signal(SIGINT, leave); 113 signal(SIGQUIT, leave); 114 signal(SIGTSTP, suspend); /* process control signal */ 115 initscr(); 116 crmode(); 117 noecho(); 118 slow = (baudrate() <= 1200); 119 clear(); 120 stw = newwin(1, COLS-1, 0, 0); 121 tv = newwin(LINES-1, COLS-1, 1, 0); 122 box(tv, '*', '*'); 123 scrollok(tv, FALSE); 124 scrollok(stw, FALSE); 125 wmove(stw, 0, 0); 126 wprintw(stw, " Worm"); 127 refresh(); 128 wrefresh(stw); 129 wrefresh(tv); 130 life(); /* Create the worm */ 131 prize(); /* Put up a goal */ 132 while(1) 133 { 134 if (running) 135 { 136 running--; 137 process(lastch); 138 } 139 else 140 { 141 fflush(stdout); 142 if (read(0, &ch, 1) >= 0) 143 process(ch); 144 } 145 } 146 } 147 148 void 149 life() 150 { 151 struct body *bp, *np; 152 int i; 153 154 np = NULL; 155 head = newlink(); 156 head->x = start_len+2; 157 head->y = 12; 158 head->next = NULL; 159 display(head, HEAD); 160 for (i = 0, bp = head; i < start_len; i++, bp = np) { 161 np = newlink(); 162 np->next = bp; 163 bp->prev = np; 164 np->x = bp->x - 1; 165 np->y = bp->y; 166 display(np, BODY); 167 } 168 tail = np; 169 tail->prev = NULL; 170 } 171 172 void 173 display(pos, chr) 174 struct body *pos; 175 char chr; 176 { 177 wmove(tv, pos->y, pos->x); 178 waddch(tv, chr); 179 } 180 181 void 182 leave(dummy) 183 int dummy; 184 { 185 endwin(); 186 exit(0); 187 } 188 189 void 190 wake(dummy) 191 int dummy; 192 { 193 signal(SIGALRM, wake); 194 fflush(stdout); 195 process(lastch); 196 } 197 198 int 199 rnd(range) 200 int range; 201 { 202 return abs((rand()>>5)+(rand()>>5)) % range; 203 } 204 205 void 206 newpos(bp) 207 struct body * bp; 208 { 209 do { 210 bp->y = rnd(LINES-3)+ 2; 211 bp->x = rnd(COLS-3) + 1; 212 wmove(tv, bp->y, bp->x); 213 } while(winch(tv) != ' '); 214 } 215 216 void 217 prize() 218 { 219 int value; 220 221 value = rnd(9) + 1; 222 newpos(&goody); 223 waddch(tv, value+'0'); 224 wrefresh(tv); 225 } 226 227 void 228 process(ch) 229 char ch; 230 { 231 int x,y; 232 struct body *nh; 233 234 alarm(0); 235 x = head->x; 236 y = head->y; 237 switch(ch) 238 { 239 case 'h': x--; break; 240 case 'j': y++; break; 241 case 'k': y--; break; 242 case 'l': x++; break; 243 case 'H': x--; running = RUNLEN; ch = tolower(ch); break; 244 case 'J': y++; running = RUNLEN/2; ch = tolower(ch); break; 245 case 'K': y--; running = RUNLEN/2; ch = tolower(ch); break; 246 case 'L': x++; running = RUNLEN; ch = tolower(ch); break; 247 case '\f': setup(); return; 248 case CNTRL('Z'): suspend(0); return; 249 case CNTRL('C'): crash(); return; 250 case CNTRL('D'): crash(); return; 251 default: if (! running) alarm(1); 252 return; 253 } 254 lastch = ch; 255 if (growing == 0) 256 { 257 display(tail, ' '); 258 tail->next->prev = NULL; 259 nh = tail->next; 260 free(tail); 261 tail = nh; 262 } 263 else growing--; 264 display(head, BODY); 265 wmove(tv, y, x); 266 if (isdigit(ch = winch(tv))) 267 { 268 growing += ch-'0'; 269 prize(); 270 score += growing; 271 running = 0; 272 wmove(stw, 0, 68); 273 wprintw(stw, "Score: %3d", score); 274 wrefresh(stw); 275 } 276 else if(ch != ' ') crash(); 277 nh = newlink(); 278 nh->next = NULL; 279 nh->prev = head; 280 head->next = nh; 281 nh->y = y; 282 nh->x = x; 283 display(nh, HEAD); 284 head = nh; 285 if (!(slow && running)) 286 wrefresh(tv); 287 if (!running) 288 alarm(1); 289 } 290 291 void 292 crash() 293 { 294 sleep(2); 295 clear(); 296 move(23, 0); 297 refresh(); 298 printf("Well, you ran into something and the game is over.\n"); 299 printf("Your final score was %d\n", score); 300 leave(0); 301 } 302 303 void 304 suspend(dummy) 305 int dummy; 306 { 307 move(LINES-1, 0); 308 refresh(); 309 endwin(); 310 fflush(stdout); 311 kill(getpid(), SIGTSTP); 312 signal(SIGTSTP, suspend); 313 crmode(); 314 noecho(); 315 setup(); 316 } 317 318 void 319 setup() 320 { 321 clear(); 322 refresh(); 323 touchwin(stw); 324 wrefresh(stw); 325 touchwin(tv); 326 wrefresh(tv); 327 alarm(1); 328 } 329
Indexes created Wed Oct 22 13:09:56 GMT 2025