1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)worms.c 8.1 (Berkeley) 5/31/93 31 * $FreeBSD: src/games/worms/worms.c,v 1.8.2.1 2000/12/04 10:36:17 alex Exp $ 32 */ 33 34 /* 35 * 36 * @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@ 37 * @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@ 38 * @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@ 39 * @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@ 40 * @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@ 41 * @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ 42 * @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ 43 * @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@ 44 * @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@ 45 * 46 * Eric P. Scott 47 * Caltech High Energy Physics 48 * October, 1980 49 * 50 */ 51 #include <sys/types.h> 52 #include <curses.h> 53 #include <err.h> 54 #include <signal.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <unistd.h> 58 59 static const struct options { 60 int nopts; 61 int opts[3]; 62 } 63 normal[8] = { 64 { 3, { 7, 0, 1 } }, 65 { 3, { 0, 1, 2 } }, 66 { 3, { 1, 2, 3 } }, 67 { 3, { 2, 3, 4 } }, 68 { 3, { 3, 4, 5 } }, 69 { 3, { 4, 5, 6 } }, 70 { 3, { 5, 6, 7 } }, 71 { 3, { 6, 7, 0 } } 72 }, upper[8] = { 73 { 1, { 1, 0, 0 } }, 74 { 2, { 1, 2, 0 } }, 75 { 0, { 0, 0, 0 } }, 76 { 0, { 0, 0, 0 } }, 77 { 0, { 0, 0, 0 } }, 78 { 2, { 4, 5, 0 } }, 79 { 1, { 5, 0, 0 } }, 80 { 2, { 1, 5, 0 } } 81 }, 82 left[8] = { 83 { 0, { 0, 0, 0 } }, 84 { 0, { 0, 0, 0 } }, 85 { 0, { 0, 0, 0 } }, 86 { 2, { 2, 3, 0 } }, 87 { 1, { 3, 0, 0 } }, 88 { 2, { 3, 7, 0 } }, 89 { 1, { 7, 0, 0 } }, 90 { 2, { 7, 0, 0 } } 91 }, 92 right[8] = { 93 { 1, { 7, 0, 0 } }, 94 { 2, { 3, 7, 0 } }, 95 { 1, { 3, 0, 0 } }, 96 { 2, { 3, 4, 0 } }, 97 { 0, { 0, 0, 0 } }, 98 { 0, { 0, 0, 0 } }, 99 { 0, { 0, 0, 0 } }, 100 { 2, { 6, 7, 0 } } 101 }, 102 lower[8] = { 103 { 0, { 0, 0, 0 } }, 104 { 2, { 0, 1, 0 } }, 105 { 1, { 1, 0, 0 } }, 106 { 2, { 1, 5, 0 } }, 107 { 1, { 5, 0, 0 } }, 108 { 2, { 5, 6, 0 } }, 109 { 0, { 0, 0, 0 } }, 110 { 0, { 0, 0, 0 } } 111 }, 112 upleft[8] = { 113 { 0, { 0, 0, 0 } }, 114 { 0, { 0, 0, 0 } }, 115 { 0, { 0, 0, 0 } }, 116 { 0, { 0, 0, 0 } }, 117 { 0, { 0, 0, 0 } }, 118 { 1, { 3, 0, 0 } }, 119 { 2, { 1, 3, 0 } }, 120 { 1, { 1, 0, 0 } } 121 }, 122 upright[8] = { 123 { 2, { 3, 5, 0 } }, 124 { 1, { 3, 0, 0 } }, 125 { 0, { 0, 0, 0 } }, 126 { 0, { 0, 0, 0 } }, 127 { 0, { 0, 0, 0 } }, 128 { 0, { 0, 0, 0 } }, 129 { 0, { 0, 0, 0 } }, 130 { 1, { 5, 0, 0 } } 131 }, 132 lowleft[8] = { 133 { 3, { 7, 0, 1 } }, 134 { 0, { 0, 0, 0 } }, 135 { 0, { 0, 0, 0 } }, 136 { 1, { 1, 0, 0 } }, 137 { 2, { 1, 7, 0 } }, 138 { 1, { 7, 0, 0 } }, 139 { 0, { 0, 0, 0 } }, 140 { 0, { 0, 0, 0 } } 141 }, 142 lowright[8] = { 143 { 0, { 0, 0, 0 } }, 144 { 1, { 7, 0, 0 } }, 145 { 2, { 5, 7, 0 } }, 146 { 1, { 5, 0, 0 } }, 147 { 0, { 0, 0, 0 } }, 148 { 0, { 0, 0, 0 } }, 149 { 0, { 0, 0, 0 } }, 150 { 0, { 0, 0, 0 } } 151 }; 152 153 154 static const char flavor[] = { 155 'O', '*', '#', '$', '%', '0', '@', '~' 156 }; 157 static const short xinc[] = { 158 1, 1, 1, 0, -1, -1, -1, 0 159 }, yinc[] = { 160 -1, 0, 1, 1, 1, 0, -1, -1 161 }; 162 static struct worm { 163 int orientation, head; 164 short *xpos, *ypos; 165 } *worm; 166 167 static volatile sig_atomic_t sig_caught = 0; 168 169 static void nomem(void) __dead2; 170 static void onsig(int); 171 172 int 173 main(int argc, char **argv) 174 { 175 int x, y, h, n; 176 struct worm *w; 177 const struct options *op; 178 short *ip; 179 int CO, LI, last, bottom, ch, length, number, trail; 180 short **ref; 181 const char *field; 182 char *mp; 183 unsigned int delay = 0; 184 185 mp = NULL; 186 length = 16; 187 number = 3; 188 trail = ' '; 189 field = NULL; 190 while ((ch = getopt(argc, argv, "d:fl:n:t")) != -1) 191 switch(ch) { 192 case 'd': 193 if ((delay = (unsigned int)strtoul(optarg, NULL, 10)) < 1 || delay > 1000) 194 errx(1, "invalid delay (1-1000)"); 195 delay *= 1000; /* ms -> us */ 196 break; 197 case 'f': 198 field = "WORM"; 199 break; 200 case 'l': 201 if ((length = atoi(optarg)) < 2 || length > 1024) { 202 errx(1, "invalid length (%d - %d).", 203 2, 1024); 204 } 205 break; 206 case 'n': 207 if ((number = atoi(optarg)) < 1) { 208 errx(1, "invalid number of worms."); 209 } 210 break; 211 case 't': 212 trail = '.'; 213 break; 214 case '?': 215 default: 216 fprintf(stderr, 217 "usage: worms [-ft] [-d delay] [-l length] [-n number]\n"); 218 exit(1); 219 } 220 221 if (!(worm = malloc((size_t)number * 222 sizeof(struct worm))) || !(mp = malloc((size_t)1024))) 223 nomem(); 224 initscr(); 225 CO = COLS; 226 LI = LINES; 227 last = CO - 1; 228 bottom = LI - 1; 229 if (!(ip = malloc((size_t)(LI * CO * sizeof(short))))) 230 nomem(); 231 if (!(ref = malloc((size_t)(LI * sizeof(short *))))) 232 nomem(); 233 for (n = 0; n < LI; ++n) { 234 ref[n] = ip; 235 ip += CO; 236 } 237 for (ip = ref[0], n = LI * CO; --n >= 0;) 238 *ip++ = 0; 239 for (n = number, w = &worm[0]; --n >= 0; w++) { 240 w->orientation = w->head = 0; 241 if (!(ip = malloc((size_t)(length * sizeof(short))))) 242 nomem(); 243 w->xpos = ip; 244 for (x = length; --x >= 0;) 245 *ip++ = -1; 246 if (!(ip = malloc((size_t)(length * sizeof(short))))) 247 nomem(); 248 w->ypos = ip; 249 for (y = length; --y >= 0;) 250 *ip++ = -1; 251 } 252 253 signal(SIGHUP, onsig); 254 signal(SIGINT, onsig); 255 signal(SIGQUIT, onsig); 256 signal(SIGSTOP, onsig); 257 signal(SIGTSTP, onsig); 258 signal(SIGTERM, onsig); 259 260 if (field) { 261 const char *p = field; 262 263 for (y = LI; --y >= 0;) { 264 for (x = CO; --x >= 0;) { 265 addch(*p++); 266 if (!*p) 267 p = field; 268 } 269 refresh(); 270 } 271 } 272 for (;;) { 273 refresh(); 274 if (sig_caught) { 275 endwin(); 276 exit(0); 277 } 278 for (n = 0, w = &worm[0]; n < number; n++, w++) { 279 if ((x = w->xpos[h = w->head]) < 0) { 280 mvaddch(y = w->ypos[h] = bottom, 281 x = w->xpos[h] = 0, 282 flavor[n % sizeof(flavor)]); 283 ref[y][x]++; 284 } 285 else 286 y = w->ypos[h]; 287 if (++h == length) 288 h = 0; 289 if (w->xpos[w->head = h] >= 0) { 290 int x1, y1; 291 292 x1 = w->xpos[h]; 293 y1 = w->ypos[h]; 294 if (--ref[y1][x1] == 0) { 295 mvaddch(y1, x1, trail); 296 } 297 } 298 op = &(!x ? (!y ? upleft : (y == bottom ? lowleft : left)) : (x == last ? (!y ? upright : (y == bottom ? lowright : right)) : (!y ? upper : (y == bottom ? lower : normal))))[w->orientation]; 299 switch (op->nopts) { 300 case 0: 301 refresh(); 302 abort(); 303 return(1); 304 case 1: 305 w->orientation = op->opts[0]; 306 break; 307 default: 308 w->orientation = 309 op->opts[(int)random() % op->nopts]; 310 } 311 mvaddch(y += yinc[w->orientation], 312 x += xinc[w->orientation], 313 flavor[n % sizeof(flavor)]); 314 ref[w->ypos[h] = y][w->xpos[h] = x]++; 315 } 316 if (usleep(delay)) 317 onsig(SIGTERM); 318 } 319 } 320 321 static void 322 onsig(int signo __unused) 323 { 324 sig_caught = 1; 325 } 326 327 static void 328 nomem(void) 329 { 330 errx(1, "not enough memory."); 331 } 332