main.c revision 1.52
1 /* $NetBSD: main.c,v 1.52 2022/05/22 08:22:43 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 1.52 2022/05/22 08:22:43 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 int 180 main(int argc, char **argv) 181 { 182 char buf[128]; 183 char *user_name; 184 int color, curmove; 185 enum input_source input[2]; 186 187 /* Revoke setgid privileges */ 188 setgid(getgid()); 189 190 setprogname(argv[0]); 191 192 user_name = getlogin(); 193 strlcpy(user, user_name != NULL ? user_name : "you", sizeof(user)); 194 195 color = curmove = 0; 196 197 parse_args(argc, argv); 198 199 if (debug == 0) 200 srandom((unsigned int)time(0)); 201 if (interactive) 202 cursinit(); /* initialize curses */ 203 again: 204 bdinit(board); /* initialize board contents */ 205 206 if (interactive) { 207 plyr[BLACK] = plyr[WHITE] = "???"; 208 bdisp_init(); /* initialize display of board */ 209 #ifdef DEBUG 210 signal(SIGINT, whatsup); 211 #else 212 signal(SIGINT, quitsig); 213 #endif 214 215 if (inputfp == NULL && test == 0) { 216 mvprintw(BSZ + 3, 0, "Black moves first. "); 217 ask("(B)lack or (W)hite? "); 218 for (;;) { 219 int ch = get_key(NULL); 220 if (ch == 'b' || ch == 'B') { 221 color = BLACK; 222 break; 223 } 224 if (ch == 'w' || ch == 'W') { 225 color = WHITE; 226 break; 227 } 228 if (ch == 'q' || ch == 'Q') { 229 quit(); 230 } 231 beep(); 232 ask("Please choose (B)lack or (W)hite: "); 233 } 234 move(BSZ + 3, 0); 235 clrtoeol(); 236 } 237 } else { 238 setbuf(stdout, 0); 239 get_line(buf, sizeof(buf), NULL); 240 if (strcmp(buf, "black") == 0) 241 color = BLACK; 242 else if (strcmp(buf, "white") == 0) 243 color = WHITE; 244 else { 245 panic("Huh? Expected `black' or `white', got `%s'\n", 246 buf); 247 } 248 } 249 250 if (inputfp != NULL) { 251 input[BLACK] = INPUTF; 252 input[WHITE] = INPUTF; 253 } else { 254 set_input_sources(input, color); 255 } 256 if (interactive) { 257 plyr[BLACK] = input[BLACK] == USER ? user : prog; 258 plyr[WHITE] = input[WHITE] == USER ? user : prog; 259 bdwho(); 260 refresh(); 261 } 262 263 int outcome; 264 for (color = BLACK; ; color = color != BLACK ? BLACK : WHITE) { 265 top: 266 switch (input[color]) { 267 case INPUTF: /* input comes from a file */ 268 curmove = readinput(inputfp); 269 if (curmove != EOF) 270 break; 271 set_input_sources(input, color); 272 plyr[BLACK] = input[BLACK] == USER ? user : prog; 273 plyr[WHITE] = input[WHITE] == USER ? user : prog; 274 bdwho(); 275 refresh(); 276 goto top; 277 278 case USER: /* input comes from standard input */ 279 getinput: 280 if (interactive) { 281 ask("Select move, (S)ave or (Q)uit."); 282 curmove = get_coord(); 283 if (curmove == SAVE) { 284 save_game(); 285 goto getinput; 286 } 287 if (curmove != RESIGN && 288 board[curmove].s_occ != EMPTY) { 289 /*misclog("Illegal move");*/ 290 beep(); 291 goto getinput; 292 } 293 } else { 294 if (!get_line(buf, sizeof(buf), NULL)) { 295 curmove = RESIGN; 296 break; 297 } 298 if (buf[0] == '\0') 299 goto getinput; 300 curmove = ctos(buf); 301 } 302 break; 303 304 case PROGRAM: /* input comes from the program */ 305 if (interactive) 306 ask("Thinking..."); 307 curmove = pickmove(color); 308 break; 309 } 310 if (interactive && curmove != ILLEGAL) { 311 misclog("%3d%*s%-6s", movenum, 312 color == BLACK ? 2 : 9, "", stoc(curmove)); 313 } 314 if ((outcome = makemove(color, curmove)) != MOVEOK) 315 break; 316 if (interactive) 317 bdisp(); 318 } 319 if (interactive) { 320 move(BSZ + 3, 0); 321 switch (outcome) { 322 case WIN: 323 if (input[color] == PROGRAM) 324 addstr("Ha ha, I won"); 325 else if (input[0] == USER && input[1] == USER) 326 addstr("Well, you won (and lost)"); 327 else 328 addstr("Rats! you won"); 329 break; 330 case TIE: 331 addstr("Wow! It's a tie"); 332 break; 333 case ILLEGAL: 334 addstr("Illegal move"); 335 break; 336 } 337 clrtoeol(); 338 bdisp(); 339 if (outcome != RESIGN) { 340 replay: 341 ask("Play again? "); 342 int ch = get_key("YyNnQqSs"); 343 if (ch == 'Y' || ch == 'y') 344 goto again; 345 if (ch == 'S') { 346 save_game(); 347 goto replay; 348 } 349 } 350 } 351 quit(); 352 } 353 354 static int 355 readinput(FILE *fp) 356 { 357 int c; 358 char buf[128]; 359 size_t pos; 360 361 pos = 0; 362 while ((c = getc(fp)) != EOF && c != '\n' && pos < sizeof(buf) - 1) 363 buf[pos++] = c; 364 buf[pos] = '\0'; 365 return c == EOF ? EOF : ctos(buf); 366 } 367 368 #ifdef DEBUG 369 /* 370 * Handle strange situations. 371 */ 372 /* ARGSUSED */ 373 void 374 whatsup(int signum) 375 { 376 int i, n, s1, s2, d1, d2; 377 struct spotstr *sp; 378 FILE *fp; 379 char *str; 380 struct elist *ep; 381 struct combostr *cbp; 382 char input[128]; 383 char tmp[128]; 384 385 if (!interactive) 386 quit(); 387 top: 388 ask("debug command: "); 389 if (!get_line(input, sizeof(input), NULL)) 390 quit(); 391 switch (*input) { 392 case '\0': 393 goto top; 394 case 'q': /* conservative quit */ 395 quit(); 396 /* NOTREACHED */ 397 case 'd': /* set debug level */ 398 debug = input[1] - '0'; 399 debuglog("Debug set to %d", debug); 400 goto top; 401 case 'c': 402 break; 403 case 'b': /* back up a move */ 404 if (movenum > 1) { 405 movenum--; 406 board[movelog[movenum - 1]].s_occ = EMPTY; 407 bdisp(); 408 } 409 goto top; 410 case 's': /* suggest a move */ 411 i = input[1] == 'b' ? BLACK : WHITE; 412 debuglog("suggest %c %s", i == BLACK ? 'B' : 'W', 413 stoc(pickmove(i))); 414 goto top; 415 case 'f': /* go forward a move */ 416 board[movelog[movenum - 1]].s_occ = 417 (movenum & 1) != 0 ? BLACK : WHITE; 418 movenum++; 419 bdisp(); 420 goto top; 421 case 'l': /* print move history */ 422 if (input[1] == '\0') { 423 for (i = 0; i < movenum - 1; i++) 424 debuglog("%s", stoc(movelog[i])); 425 goto top; 426 } 427 if ((fp = fopen(input + 1, "w")) == NULL) 428 goto top; 429 for (i = 0; i < movenum - 1; i++) { 430 fprintf(fp, "%s", stoc(movelog[i])); 431 if (++i < movenum - 1) 432 fprintf(fp, " %s\n", stoc(movelog[i])); 433 else 434 fputc('\n', fp); 435 } 436 bdump(fp); 437 fclose(fp); 438 goto top; 439 case 'o': 440 /* avoid use w/o initialization on invalid input */ 441 d1 = s1 = 0; 442 443 n = 0; 444 for (str = input + 1; *str != '\0'; str++) 445 if (*str == ',') { 446 for (d1 = 0; d1 < 4; d1++) 447 if (str[-1] == pdir[d1]) 448 break; 449 str[-1] = '\0'; 450 sp = &board[s1 = ctos(input + 1)]; 451 n = (int)(sp->s_frame[d1] - frames) * FAREA; 452 *str++ = '\0'; 453 break; 454 } 455 sp = &board[s2 = ctos(str)]; 456 while (*str != '\0') 457 str++; 458 for (d2 = 0; d2 < 4; d2++) 459 if (str[-1] == pdir[d2]) 460 break; 461 n += (int)(sp->s_frame[d2] - frames); 462 debuglog("overlap %s%c,%s%c = %x", stoc(s1), pdir[d1], 463 stoc(s2), pdir[d2], overlap[n]); 464 goto top; 465 case 'p': 466 sp = &board[i = ctos(input + 1)]; 467 debuglog("V %s %x/%d %d %x/%d %d %d %x", stoc(i), 468 sp->s_combo[BLACK].s, sp->s_level[BLACK], 469 sp->s_nforce[BLACK], 470 sp->s_combo[WHITE].s, sp->s_level[WHITE], 471 sp->s_nforce[WHITE], sp->s_wval, sp->s_flags); 472 debuglog("FB %s %x %x %x %x", stoc(i), 473 sp->s_fval[BLACK][0].s, sp->s_fval[BLACK][1].s, 474 sp->s_fval[BLACK][2].s, sp->s_fval[BLACK][3].s); 475 debuglog("FW %s %x %x %x %x", stoc(i), 476 sp->s_fval[WHITE][0].s, sp->s_fval[WHITE][1].s, 477 sp->s_fval[WHITE][2].s, sp->s_fval[WHITE][3].s); 478 goto top; 479 case 'e': /* e {b|w} [0-9] spot */ 480 str = input + 1; 481 if (*str >= '0' && *str <= '9') 482 n = *str++ - '0'; 483 else 484 n = 0; 485 sp = &board[i = ctos(str)]; 486 for (ep = sp->s_empty; ep != NULL; ep = ep->e_next) { 487 cbp = ep->e_combo; 488 if (n != 0) { 489 if (cbp->c_nframes > n) 490 continue; 491 if (cbp->c_nframes != n) 492 break; 493 } 494 printcombo(cbp, tmp, sizeof(tmp)); 495 debuglog("%s", tmp); 496 } 497 goto top; 498 default: 499 debuglog("Options are:"); 500 debuglog("q - quit"); 501 debuglog("c - continue"); 502 debuglog("d# - set debug level to #"); 503 debuglog("p# - print values at #"); 504 goto top; 505 } 506 } 507 #endif /* DEBUG */ 508 509 /* 510 * Display debug info. 511 */ 512 void 513 debuglog(const char *fmt, ...) 514 { 515 va_list ap; 516 char buf[128]; 517 518 va_start(ap, fmt); 519 vsnprintf(buf, sizeof(buf), fmt, ap); 520 va_end(ap); 521 522 if (debugfp != NULL) 523 fprintf(debugfp, "%s\n", buf); 524 if (interactive) 525 dislog(buf); 526 else 527 fprintf(stderr, "%s\n", buf); 528 } 529 530 static void 531 misclog(const char *fmt, ...) 532 { 533 va_list ap; 534 char buf[128]; 535 536 va_start(ap, fmt); 537 vsnprintf(buf, sizeof(buf), fmt, ap); 538 va_end(ap); 539 540 if (debugfp != NULL) 541 fprintf(debugfp, "%s\n", buf); 542 if (interactive) 543 dislog(buf); 544 else 545 printf("%s\n", buf); 546 } 547 548 static void 549 quit(void) 550 { 551 if (interactive) { 552 bdisp(); /* show final board */ 553 cursfini(); 554 } 555 exit(0); 556 } 557 558 #if !defined(DEBUG) 559 static void 560 quitsig(int dummy __unused) 561 { 562 quit(); 563 } 564 #endif 565 566 /* 567 * Die gracefully. 568 */ 569 void 570 panic(const char *fmt, ...) 571 { 572 va_list ap; 573 574 if (interactive) { 575 bdisp(); 576 cursfini(); 577 } 578 579 fprintf(stderr, "%s: ", prog); 580 va_start(ap, fmt); 581 vfprintf(stderr, fmt, ap); 582 va_end(ap); 583 fprintf(stderr, "\n"); 584 585 fputs("I resign\n", stdout); 586 exit(1); 587 } 588
Indexes created Mon Sep 29 21:09:56 GMT 2025