main.c revision 1.53
1 /* $NetBSD: main.c,v 1.53 2022/05/22 08:28:10 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __COPYRIGHT("@(#) Copyright (c) 1994\ 37 The Regents of the University of California. All rights reserved."); 38 /* @(#)main.c 8.4 (Berkeley) 5/4/95 */ 39 __RCSID("$NetBSD: main.c,v 1.53 2022/05/22 08:28:10 rillig Exp $"); 40 41 #include <sys/stat.h> 42 #include <curses.h> 43 #include <err.h> 44 #include <limits.h> 45 #include <signal.h> 46 #include <stdarg.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <time.h> 50 #include <unistd.h> 51 52 #include "gomoku.h" 53 54 enum input_source { 55 USER, /* get input from standard input */ 56 PROGRAM, /* get input from program */ 57 INPUTF /* get input from a file */ 58 }; 59 60 bool interactive = true; /* true if interactive */ 61 int debug; /* > 0 if debugging */ 62 static int test; /* both moves come from 1: input, 2: computer */ 63 static char *prog; /* name of program */ 64 static char user[LOGIN_NAME_MAX]; /* name of player */ 65 static FILE *debugfp; /* file for debug output */ 66 static FILE *inputfp; /* file for debug input */ 67 68 const char pdir[4] = "-\\|/"; 69 70 struct spotstr board[BAREA]; /* info for board */ 71 struct combostr frames[FAREA]; /* storage for all frames */ 72 struct combostr *sortframes[2]; /* sorted list of non-empty frames */ 73 u_char overlap[FAREA * FAREA]; /* true if frame [a][b] overlap */ 74 short intersect[FAREA * FAREA]; /* frame [a][b] intersection */ 75 int movelog[BSZ * BSZ]; /* log of all the moves */ 76 int movenum; /* current move number */ 77 const char *plyr[2]; /* who's who */ 78 79 static int readinput(FILE *); 80 static void misclog(const char *, ...) __printflike(1, 2); 81 static void quit(void) __dead; 82 #if !defined(DEBUG) 83 static void quitsig(int) __dead; 84 #endif 85 86 static void 87 warn_if_exists(const char *fname) 88 { 89 struct stat st; 90 91 if (lstat(fname, &st) == 0) { 92 int x, y; 93 getyx(stdscr, y, x); 94 addstr(" (already exists)"); 95 move(y, x); 96 } else 97 clrtoeol(); 98 } 99 100 static void 101 save_game(void) 102 { 103 char fname[PATH_MAX]; 104 FILE *fp; 105 106 ask("Save file name? "); 107 (void)get_line(fname, sizeof(fname), warn_if_exists); 108 if ((fp = fopen(fname, "w")) == NULL) { 109 misclog("cannot create save file"); 110 return; 111 } 112 for (int i = 0; i < movenum - 1; i++) 113 fprintf(fp, "%s\n", stoc(movelog[i])); 114 fclose(fp); 115 } 116 117 static void 118 parse_args(int argc, char **argv) 119 { 120 int ch; 121 122 prog = strrchr(argv[0], '/'); 123 prog = prog != NULL ? prog + 1 : argv[0]; 124 125 while ((ch = getopt(argc, argv, "bcdD:u")) != -1) { 126 switch (ch) { 127 case 'b': /* background */ 128 interactive = false; 129 break; 130 case 'c': /* testing: computer versus computer */ 131 test = 2; 132 break; 133 case 'd': 134 debug++; 135 break; 136 case 'D': /* log debug output to file */ 137 if ((debugfp = fopen(optarg, "w")) == NULL) 138 err(1, "%s", optarg); 139 break; 140 case 'u': /* testing: user versus user */ 141 test = 1; 142 break; 143 default: 144 usage: 145 fprintf(stderr, "usage: %s [-bcdu] [-Dfile] [file]\n", 146 getprogname()); 147 exit(EXIT_FAILURE); 148 } 149 } 150 argc -= optind; 151 argv += optind; 152 if (argc > 1) 153 goto usage; 154 if (argc == 1 && (inputfp = fopen(*argv, "r")) == NULL) 155 err(1, "%s", *argv); 156 } 157 158 static void 159 set_input_sources(enum input_source *input, int color) 160 { 161 switch (test) { 162 case 0: /* user versus program */ 163 input[color] = USER; 164 input[color != BLACK ? BLACK : WHITE] = PROGRAM; 165 break; 166 167 case 1: /* user versus user */ 168 input[BLACK] = USER; 169 input[WHITE] = USER; 170 break; 171 172 case 2: /* program versus program */ 173 input[BLACK] = PROGRAM; 174 input[WHITE] = PROGRAM; 175 break; 176 } 177 } 178 179 static int 180 read_move(void) 181 { 182 again: 183 if (interactive) { 184 ask("Select move, (S)ave or (Q)uit."); 185 int s = get_coord(); 186 if (s == SAVE) { 187 save_game(); 188 goto again; 189 } 190 if (s != RESIGN && board[s].s_occ != EMPTY) { 191 beep(); 192 goto again; 193 } 194 return s; 195 } else { 196 char buf[128]; 197 if (!get_line(buf, sizeof(buf), NULL)) 198 return RESIGN; 199 if (buf[0] == '\0') 200 goto again; 201 return ctos(buf); 202 } 203 } 204 205 int 206 main(int argc, char **argv) 207 { 208 char buf[128]; 209 char *user_name; 210 int color, curmove; 211 enum input_source input[2]; 212 213 /* Revoke setgid privileges */ 214 setgid(getgid()); 215 216 setprogname(argv[0]); 217 218 user_name = getlogin(); 219 strlcpy(user, user_name != NULL ? user_name : "you", sizeof(user)); 220 221 color = curmove = 0; 222 223 parse_args(argc, argv); 224 225 if (debug == 0) 226 srandom((unsigned int)time(0)); 227 if (interactive) 228 cursinit(); /* initialize curses */ 229 again: 230 bdinit(board); /* initialize board contents */ 231 232 if (interactive) { 233 plyr[BLACK] = plyr[WHITE] = "???"; 234 bdisp_init(); /* initialize display of board */ 235 #ifdef DEBUG 236 signal(SIGINT, whatsup); 237 #else 238 signal(SIGINT, quitsig); 239 #endif 240 241 if (inputfp == NULL && test == 0) { 242 mvprintw(BSZ + 3, 0, "Black moves first. "); 243 ask("(B)lack or (W)hite? "); 244 for (;;) { 245 int ch = get_key(NULL); 246 if (ch == 'b' || ch == 'B') { 247 color = BLACK; 248 break; 249 } 250 if (ch == 'w' || ch == 'W') { 251 color = WHITE; 252 break; 253 } 254 if (ch == 'q' || ch == 'Q') { 255 quit(); 256 } 257 beep(); 258 ask("Please choose (B)lack or (W)hite: "); 259 } 260 move(BSZ + 3, 0); 261 clrtoeol(); 262 } 263 } else { 264 setbuf(stdout, 0); 265 get_line(buf, sizeof(buf), NULL); 266 if (strcmp(buf, "black") == 0) 267 color = BLACK; 268 else if (strcmp(buf, "white") == 0) 269 color = WHITE; 270 else { 271 panic("Huh? Expected `black' or `white', got `%s'\n", 272 buf); 273 } 274 } 275 276 if (inputfp != NULL) { 277 input[BLACK] = INPUTF; 278 input[WHITE] = INPUTF; 279 } else { 280 set_input_sources(input, color); 281 } 282 if (interactive) { 283 plyr[BLACK] = input[BLACK] == USER ? user : prog; 284 plyr[WHITE] = input[WHITE] == USER ? user : prog; 285 bdwho(); 286 refresh(); 287 } 288 289 int outcome; 290 for (color = BLACK; ; color = color != BLACK ? BLACK : WHITE) { 291 top: 292 switch (input[color]) { 293 case INPUTF: /* input comes from a file */ 294 curmove = readinput(inputfp); 295 if (curmove != EOF) 296 break; 297 set_input_sources(input, color); 298 plyr[BLACK] = input[BLACK] == USER ? user : prog; 299 plyr[WHITE] = input[WHITE] == USER ? user : prog; 300 bdwho(); 301 refresh(); 302 goto top; 303 304 case USER: /* input comes from standard input */ 305 curmove = read_move(); 306 break; 307 308 case PROGRAM: /* input comes from the program */ 309 if (interactive) 310 ask("Thinking..."); 311 curmove = pickmove(color); 312 break; 313 } 314 if (interactive && curmove != ILLEGAL) { 315 misclog("%3d%*s%-6s", movenum, 316 color == BLACK ? 2 : 9, "", stoc(curmove)); 317 } 318 if ((outcome = makemove(color, curmove)) != MOVEOK) 319 break; 320 if (interactive) 321 bdisp(); 322 } 323 if (interactive) { 324 move(BSZ + 3, 0); 325 switch (outcome) { 326 case WIN: 327 if (input[color] == PROGRAM) 328 addstr("Ha ha, I won"); 329 else if (input[0] == USER && input[1] == USER) 330 addstr("Well, you won (and lost)"); 331 else 332 addstr("Rats! you won"); 333 break; 334 case TIE: 335 addstr("Wow! It's a tie"); 336 break; 337 case ILLEGAL: 338 addstr("Illegal move"); 339 break; 340 } 341 clrtoeol(); 342 bdisp(); 343 if (outcome != RESIGN) { 344 replay: 345 ask("Play again? "); 346 int ch = get_key("YyNnQqSs"); 347 if (ch == 'Y' || ch == 'y') 348 goto again; 349 if (ch == 'S') { 350 save_game(); 351 goto replay; 352 } 353 } 354 } 355 quit(); 356 } 357 358 static int 359 readinput(FILE *fp) 360 { 361 int c; 362 char buf[128]; 363 size_t pos; 364 365 pos = 0; 366 while ((c = getc(fp)) != EOF && c != '\n' && pos < sizeof(buf) - 1) 367 buf[pos++] = c; 368 buf[pos] = '\0'; 369 return c == EOF ? EOF : ctos(buf); 370 } 371 372 #ifdef DEBUG 373 /* 374 * Handle strange situations. 375 */ 376 /* ARGSUSED */ 377 void 378 whatsup(int signum) 379 { 380 int i, n, s1, s2, d1, d2; 381 struct spotstr *sp; 382 FILE *fp; 383 char *str; 384 struct elist *ep; 385 struct combostr *cbp; 386 char input[128]; 387 char tmp[128]; 388 389 if (!interactive) 390 quit(); 391 top: 392 ask("debug command: "); 393 if (!get_line(input, sizeof(input), NULL)) 394 quit(); 395 switch (*input) { 396 case '\0': 397 goto top; 398 case 'q': /* conservative quit */ 399 quit(); 400 /* NOTREACHED */ 401 case 'd': /* set debug level */ 402 debug = input[1] - '0'; 403 debuglog("Debug set to %d", debug); 404 goto top; 405 case 'c': 406 break; 407 case 'b': /* back up a move */ 408 if (movenum > 1) { 409 movenum--; 410 board[movelog[movenum - 1]].s_occ = EMPTY; 411 bdisp(); 412 } 413 goto top; 414 case 's': /* suggest a move */ 415 i = input[1] == 'b' ? BLACK : WHITE; 416 debuglog("suggest %c %s", i == BLACK ? 'B' : 'W', 417 stoc(pickmove(i))); 418 goto top; 419 case 'f': /* go forward a move */ 420 board[movelog[movenum - 1]].s_occ = 421 (movenum & 1) != 0 ? BLACK : WHITE; 422 movenum++; 423 bdisp(); 424 goto top; 425 case 'l': /* print move history */ 426 if (input[1] == '\0') { 427 for (i = 0; i < movenum - 1; i++) 428 debuglog("%s", stoc(movelog[i])); 429 goto top; 430 } 431 if ((fp = fopen(input + 1, "w")) == NULL) 432 goto top; 433 for (i = 0; i < movenum - 1; i++) { 434 fprintf(fp, "%s", stoc(movelog[i])); 435 if (++i < movenum - 1) 436 fprintf(fp, " %s\n", stoc(movelog[i])); 437 else 438 fputc('\n', fp); 439 } 440 bdump(fp); 441 fclose(fp); 442 goto top; 443 case 'o': 444 /* avoid use w/o initialization on invalid input */ 445 d1 = s1 = 0; 446 447 n = 0; 448 for (str = input + 1; *str != '\0'; str++) 449 if (*str == ',') { 450 for (d1 = 0; d1 < 4; d1++) 451 if (str[-1] == pdir[d1]) 452 break; 453 str[-1] = '\0'; 454 sp = &board[s1 = ctos(input + 1)]; 455 n = (int)(sp->s_frame[d1] - frames) * FAREA; 456 *str++ = '\0'; 457 break; 458 } 459 sp = &board[s2 = ctos(str)]; 460 while (*str != '\0') 461 str++; 462 for (d2 = 0; d2 < 4; d2++) 463 if (str[-1] == pdir[d2]) 464 break; 465 n += (int)(sp->s_frame[d2] - frames); 466 debuglog("overlap %s%c,%s%c = %x", stoc(s1), pdir[d1], 467 stoc(s2), pdir[d2], overlap[n]); 468 goto top; 469 case 'p': 470 sp = &board[i = ctos(input + 1)]; 471 debuglog("V %s %x/%d %d %x/%d %d %d %x", stoc(i), 472 sp->s_combo[BLACK].s, sp->s_level[BLACK], 473 sp->s_nforce[BLACK], 474 sp->s_combo[WHITE].s, sp->s_level[WHITE], 475 sp->s_nforce[WHITE], sp->s_wval, sp->s_flags); 476 debuglog("FB %s %x %x %x %x", stoc(i), 477 sp->s_fval[BLACK][0].s, sp->s_fval[BLACK][1].s, 478 sp->s_fval[BLACK][2].s, sp->s_fval[BLACK][3].s); 479 debuglog("FW %s %x %x %x %x", stoc(i), 480 sp->s_fval[WHITE][0].s, sp->s_fval[WHITE][1].s, 481 sp->s_fval[WHITE][2].s, sp->s_fval[WHITE][3].s); 482 goto top; 483 case 'e': /* e {b|w} [0-9] spot */ 484 str = input + 1; 485 if (*str >= '0' && *str <= '9') 486 n = *str++ - '0'; 487 else 488 n = 0; 489 sp = &board[i = ctos(str)]; 490 for (ep = sp->s_empty; ep != NULL; ep = ep->e_next) { 491 cbp = ep->e_combo; 492 if (n != 0) { 493 if (cbp->c_nframes > n) 494 continue; 495 if (cbp->c_nframes != n) 496 break; 497 } 498 printcombo(cbp, tmp, sizeof(tmp)); 499 debuglog("%s", tmp); 500 } 501 goto top; 502 default: 503 debuglog("Options are:"); 504 debuglog("q - quit"); 505 debuglog("c - continue"); 506 debuglog("d# - set debug level to #"); 507 debuglog("p# - print values at #"); 508 goto top; 509 } 510 } 511 #endif /* DEBUG */ 512 513 /* 514 * Display debug info. 515 */ 516 void 517 debuglog(const char *fmt, ...) 518 { 519 va_list ap; 520 char buf[128]; 521 522 va_start(ap, fmt); 523 vsnprintf(buf, sizeof(buf), fmt, ap); 524 va_end(ap); 525 526 if (debugfp != NULL) 527 fprintf(debugfp, "%s\n", buf); 528 if (interactive) 529 dislog(buf); 530 else 531 fprintf(stderr, "%s\n", buf); 532 } 533 534 static void 535 misclog(const char *fmt, ...) 536 { 537 va_list ap; 538 char buf[128]; 539 540 va_start(ap, fmt); 541 vsnprintf(buf, sizeof(buf), fmt, ap); 542 va_end(ap); 543 544 if (debugfp != NULL) 545 fprintf(debugfp, "%s\n", buf); 546 if (interactive) 547 dislog(buf); 548 else 549 printf("%s\n", buf); 550 } 551 552 static void 553 quit(void) 554 { 555 if (interactive) { 556 bdisp(); /* show final board */ 557 cursfini(); 558 } 559 exit(0); 560 } 561 562 #if !defined(DEBUG) 563 static void 564 quitsig(int dummy __unused) 565 { 566 quit(); 567 } 568 #endif 569 570 /* 571 * Die gracefully. 572 */ 573 void 574 panic(const char *fmt, ...) 575 { 576 va_list ap; 577 578 if (interactive) { 579 bdisp(); 580 cursfini(); 581 } 582 583 fprintf(stderr, "%s: ", prog); 584 va_start(ap, fmt); 585 vfprintf(stderr, fmt, ap); 586 va_end(ap); 587 fprintf(stderr, "\n"); 588 589 fputs("I resign\n", stdout); 590 exit(1); 591 } 592
Indexes created Wed Oct 01 07:09:59 GMT 2025