main.c revision 1.54
1 /* $NetBSD: main.c,v 1.54 2022/05/22 08:31:12 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 1.54 2022/05/22 08:31:12 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 ask_user_color(void) 181 { 182 int color; 183 184 mvprintw(BSZ + 3, 0, "Black moves first. "); 185 ask("(B)lack or (W)hite? "); 186 for (;;) { 187 int ch = get_key(NULL); 188 if (ch == 'b' || ch == 'B') { 189 color = BLACK; 190 break; 191 } 192 if (ch == 'w' || ch == 'W') { 193 color = WHITE; 194 break; 195 } 196 if (ch == 'q' || ch == 'Q') 197 quit(); 198 199 beep(); 200 ask("Please choose (B)lack or (W)hite: "); 201 } 202 move(BSZ + 3, 0); 203 clrtoeol(); 204 return color; 205 } 206 207 static int 208 read_move(void) 209 { 210 again: 211 if (interactive) { 212 ask("Select move, (S)ave or (Q)uit."); 213 int s = get_coord(); 214 if (s == SAVE) { 215 save_game(); 216 goto again; 217 } 218 if (s != RESIGN && board[s].s_occ != EMPTY) { 219 beep(); 220 goto again; 221 } 222 return s; 223 } else { 224 char buf[128]; 225 if (!get_line(buf, sizeof(buf), NULL)) 226 return RESIGN; 227 if (buf[0] == '\0') 228 goto again; 229 return ctos(buf); 230 } 231 } 232 233 int 234 main(int argc, char **argv) 235 { 236 char buf[128]; 237 char *user_name; 238 int color, curmove; 239 enum input_source input[2]; 240 241 /* Revoke setgid privileges */ 242 setgid(getgid()); 243 244 setprogname(argv[0]); 245 246 user_name = getlogin(); 247 strlcpy(user, user_name != NULL ? user_name : "you", sizeof(user)); 248 249 color = curmove = 0; 250 251 parse_args(argc, argv); 252 253 if (debug == 0) 254 srandom((unsigned int)time(0)); 255 if (interactive) 256 cursinit(); /* initialize curses */ 257 again: 258 bdinit(board); /* initialize board contents */ 259 260 if (interactive) { 261 plyr[BLACK] = plyr[WHITE] = "???"; 262 bdisp_init(); /* initialize display of board */ 263 #ifdef DEBUG 264 signal(SIGINT, whatsup); 265 #else 266 signal(SIGINT, quitsig); 267 #endif 268 269 if (inputfp == NULL && test == 0) { 270 color = ask_user_color(); 271 } 272 } else { 273 setbuf(stdout, 0); 274 get_line(buf, sizeof(buf), NULL); 275 if (strcmp(buf, "black") == 0) 276 color = BLACK; 277 else if (strcmp(buf, "white") == 0) 278 color = WHITE; 279 else { 280 panic("Huh? Expected `black' or `white', got `%s'\n", 281 buf); 282 } 283 } 284 285 if (inputfp != NULL) { 286 input[BLACK] = INPUTF; 287 input[WHITE] = INPUTF; 288 } else { 289 set_input_sources(input, color); 290 } 291 if (interactive) { 292 plyr[BLACK] = input[BLACK] == USER ? user : prog; 293 plyr[WHITE] = input[WHITE] == USER ? user : prog; 294 bdwho(); 295 refresh(); 296 } 297 298 int outcome; 299 for (color = BLACK; ; color = color != BLACK ? BLACK : WHITE) { 300 top: 301 switch (input[color]) { 302 case INPUTF: /* input comes from a file */ 303 curmove = readinput(inputfp); 304 if (curmove != EOF) 305 break; 306 set_input_sources(input, color); 307 plyr[BLACK] = input[BLACK] == USER ? user : prog; 308 plyr[WHITE] = input[WHITE] == USER ? user : prog; 309 bdwho(); 310 refresh(); 311 goto top; 312 313 case USER: /* input comes from standard input */ 314 curmove = read_move(); 315 break; 316 317 case PROGRAM: /* input comes from the program */ 318 if (interactive) 319 ask("Thinking..."); 320 curmove = pickmove(color); 321 break; 322 } 323 if (interactive && curmove != ILLEGAL) { 324 misclog("%3d%*s%-6s", movenum, 325 color == BLACK ? 2 : 9, "", stoc(curmove)); 326 } 327 if ((outcome = makemove(color, curmove)) != MOVEOK) 328 break; 329 if (interactive) 330 bdisp(); 331 } 332 if (interactive) { 333 move(BSZ + 3, 0); 334 switch (outcome) { 335 case WIN: 336 if (input[color] == PROGRAM) 337 addstr("Ha ha, I won"); 338 else if (input[0] == USER && input[1] == USER) 339 addstr("Well, you won (and lost)"); 340 else 341 addstr("Rats! you won"); 342 break; 343 case TIE: 344 addstr("Wow! It's a tie"); 345 break; 346 case ILLEGAL: 347 addstr("Illegal move"); 348 break; 349 } 350 clrtoeol(); 351 bdisp(); 352 if (outcome != RESIGN) { 353 replay: 354 ask("Play again? "); 355 int ch = get_key("YyNnQqSs"); 356 if (ch == 'Y' || ch == 'y') 357 goto again; 358 if (ch == 'S') { 359 save_game(); 360 goto replay; 361 } 362 } 363 } 364 quit(); 365 } 366 367 static int 368 readinput(FILE *fp) 369 { 370 int c; 371 char buf[128]; 372 size_t pos; 373 374 pos = 0; 375 while ((c = getc(fp)) != EOF && c != '\n' && pos < sizeof(buf) - 1) 376 buf[pos++] = c; 377 buf[pos] = '\0'; 378 return c == EOF ? EOF : ctos(buf); 379 } 380 381 #ifdef DEBUG 382 /* 383 * Handle strange situations. 384 */ 385 /* ARGSUSED */ 386 void 387 whatsup(int signum) 388 { 389 int i, n, s1, s2, d1, d2; 390 struct spotstr *sp; 391 FILE *fp; 392 char *str; 393 struct elist *ep; 394 struct combostr *cbp; 395 char input[128]; 396 char tmp[128]; 397 398 if (!interactive) 399 quit(); 400 top: 401 ask("debug command: "); 402 if (!get_line(input, sizeof(input), NULL)) 403 quit(); 404 switch (*input) { 405 case '\0': 406 goto top; 407 case 'q': /* conservative quit */ 408 quit(); 409 /* NOTREACHED */ 410 case 'd': /* set debug level */ 411 debug = input[1] - '0'; 412 debuglog("Debug set to %d", debug); 413 goto top; 414 case 'c': 415 break; 416 case 'b': /* back up a move */ 417 if (movenum > 1) { 418 movenum--; 419 board[movelog[movenum - 1]].s_occ = EMPTY; 420 bdisp(); 421 } 422 goto top; 423 case 's': /* suggest a move */ 424 i = input[1] == 'b' ? BLACK : WHITE; 425 debuglog("suggest %c %s", i == BLACK ? 'B' : 'W', 426 stoc(pickmove(i))); 427 goto top; 428 case 'f': /* go forward a move */ 429 board[movelog[movenum - 1]].s_occ = 430 (movenum & 1) != 0 ? BLACK : WHITE; 431 movenum++; 432 bdisp(); 433 goto top; 434 case 'l': /* print move history */ 435 if (input[1] == '\0') { 436 for (i = 0; i < movenum - 1; i++) 437 debuglog("%s", stoc(movelog[i])); 438 goto top; 439 } 440 if ((fp = fopen(input + 1, "w")) == NULL) 441 goto top; 442 for (i = 0; i < movenum - 1; i++) { 443 fprintf(fp, "%s", stoc(movelog[i])); 444 if (++i < movenum - 1) 445 fprintf(fp, " %s\n", stoc(movelog[i])); 446 else 447 fputc('\n', fp); 448 } 449 bdump(fp); 450 fclose(fp); 451 goto top; 452 case 'o': 453 /* avoid use w/o initialization on invalid input */ 454 d1 = s1 = 0; 455 456 n = 0; 457 for (str = input + 1; *str != '\0'; str++) 458 if (*str == ',') { 459 for (d1 = 0; d1 < 4; d1++) 460 if (str[-1] == pdir[d1]) 461 break; 462 str[-1] = '\0'; 463 sp = &board[s1 = ctos(input + 1)]; 464 n = (int)(sp->s_frame[d1] - frames) * FAREA; 465 *str++ = '\0'; 466 break; 467 } 468 sp = &board[s2 = ctos(str)]; 469 while (*str != '\0') 470 str++; 471 for (d2 = 0; d2 < 4; d2++) 472 if (str[-1] == pdir[d2]) 473 break; 474 n += (int)(sp->s_frame[d2] - frames); 475 debuglog("overlap %s%c,%s%c = %x", stoc(s1), pdir[d1], 476 stoc(s2), pdir[d2], overlap[n]); 477 goto top; 478 case 'p': 479 sp = &board[i = ctos(input + 1)]; 480 debuglog("V %s %x/%d %d %x/%d %d %d %x", stoc(i), 481 sp->s_combo[BLACK].s, sp->s_level[BLACK], 482 sp->s_nforce[BLACK], 483 sp->s_combo[WHITE].s, sp->s_level[WHITE], 484 sp->s_nforce[WHITE], sp->s_wval, sp->s_flags); 485 debuglog("FB %s %x %x %x %x", stoc(i), 486 sp->s_fval[BLACK][0].s, sp->s_fval[BLACK][1].s, 487 sp->s_fval[BLACK][2].s, sp->s_fval[BLACK][3].s); 488 debuglog("FW %s %x %x %x %x", stoc(i), 489 sp->s_fval[WHITE][0].s, sp->s_fval[WHITE][1].s, 490 sp->s_fval[WHITE][2].s, sp->s_fval[WHITE][3].s); 491 goto top; 492 case 'e': /* e {b|w} [0-9] spot */ 493 str = input + 1; 494 if (*str >= '0' && *str <= '9') 495 n = *str++ - '0'; 496 else 497 n = 0; 498 sp = &board[i = ctos(str)]; 499 for (ep = sp->s_empty; ep != NULL; ep = ep->e_next) { 500 cbp = ep->e_combo; 501 if (n != 0) { 502 if (cbp->c_nframes > n) 503 continue; 504 if (cbp->c_nframes != n) 505 break; 506 } 507 printcombo(cbp, tmp, sizeof(tmp)); 508 debuglog("%s", tmp); 509 } 510 goto top; 511 default: 512 debuglog("Options are:"); 513 debuglog("q - quit"); 514 debuglog("c - continue"); 515 debuglog("d# - set debug level to #"); 516 debuglog("p# - print values at #"); 517 goto top; 518 } 519 } 520 #endif /* DEBUG */ 521 522 /* 523 * Display debug info. 524 */ 525 void 526 debuglog(const char *fmt, ...) 527 { 528 va_list ap; 529 char buf[128]; 530 531 va_start(ap, fmt); 532 vsnprintf(buf, sizeof(buf), fmt, ap); 533 va_end(ap); 534 535 if (debugfp != NULL) 536 fprintf(debugfp, "%s\n", buf); 537 if (interactive) 538 dislog(buf); 539 else 540 fprintf(stderr, "%s\n", buf); 541 } 542 543 static void 544 misclog(const char *fmt, ...) 545 { 546 va_list ap; 547 char buf[128]; 548 549 va_start(ap, fmt); 550 vsnprintf(buf, sizeof(buf), fmt, ap); 551 va_end(ap); 552 553 if (debugfp != NULL) 554 fprintf(debugfp, "%s\n", buf); 555 if (interactive) 556 dislog(buf); 557 else 558 printf("%s\n", buf); 559 } 560 561 static void 562 quit(void) 563 { 564 if (interactive) { 565 bdisp(); /* show final board */ 566 cursfini(); 567 } 568 exit(0); 569 } 570 571 #if !defined(DEBUG) 572 static void 573 quitsig(int dummy __unused) 574 { 575 quit(); 576 } 577 #endif 578 579 /* 580 * Die gracefully. 581 */ 582 void 583 panic(const char *fmt, ...) 584 { 585 va_list ap; 586 587 if (interactive) { 588 bdisp(); 589 cursfini(); 590 } 591 592 fprintf(stderr, "%s: ", prog); 593 va_start(ap, fmt); 594 vfprintf(stderr, fmt, ap); 595 va_end(ap); 596 fprintf(stderr, "\n"); 597 598 fputs("I resign\n", stdout); 599 exit(1); 600 } 601
Indexes created Tue Sep 30 20:09:53 GMT 2025