gomoku/main.c

   1 /*      $NetBSD: main.c,v 1.25 2010/03/29 05:16:08 dholland 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 #ifndef lint
  37 __COPYRIGHT("@(#) Copyright (c) 1994\
  38  The Regents of the University of California.  All rights reserved.");
  39 #endif /* not lint */
  40
  41 #ifndef lint
  42 #if 0
  43 static char sccsid[] = "@(#)main.c      8.4 (Berkeley) 5/4/95";
  44 #else
  45 __RCSID("$NetBSD: main.c,v 1.25 2010/03/29 05:16:08 dholland Exp $");
  46 #endif
  47 #endif /* not lint */
  48
  49 #include <curses.h>
  50 #include <err.h>
  51 #include <limits.h>
  52 #include <signal.h>
  53 #include <stdarg.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <time.h>
  57 #include <unistd.h>
  58
  59 #include "gomoku.h"
  60
  61 #define USER    0               /* get input from standard input */
  62 #define PROGRAM 1               /* get input from program */
  63 #define INPUTF  2               /* get input from a file */
  64
  65 int     interactive = 1;        /* true if interactive */
  66 int     debug;                  /* true if debugging */
  67 static int test;                /* both moves come from 1: input, 2: computer */
  68 static char *prog;              /* name of program */
  69 static char user[LOGIN_NAME_MAX]; /* name of player */
  70 static FILE *debugfp;           /* file for debug output */
  71 static FILE *inputfp;           /* file for debug input */
  72
  73 const char      pdir[4]         = "-\\|/";
  74
  75 struct  spotstr board[BAREA];           /* info for board */
  76 struct  combostr frames[FAREA];         /* storage for all frames */
  77 struct  combostr *sortframes[2];        /* sorted list of non-empty frames */
  78 u_char  overlap[FAREA * FAREA];         /* true if frame [a][b] overlap */
  79 short   intersect[FAREA * FAREA];       /* frame [a][b] intersection */
  80 int     movelog[BSZ * BSZ];             /* log of all the moves */
  81 int     movenum;                        /* current move number */
  82 const char      *plyr[2];                       /* who's who */
  83
  84 static int readinput(FILE *);
  85 static void misclog(const char *, ...) __printflike(1, 2);
  86 static void quit(void) __dead;
  87 static void quitsig(int) __dead;
  88
  89 int
  90 main(int argc, char **argv)
  91 {
  92         char buf[128];
  93         char fname[PATH_MAX];
  94         char *tmp;
  95         int color, curmove, i, ch;
  96         int input[2];
  97         static const char *const fmt[2] = {
  98                 "%3d %-6s",
  99                 "%3d        %-6s"
 100         };
 101
 102         /* Revoke setgid privileges */
 103         setgid(getgid());
 104
 105         tmp = getlogin();
 106         if (tmp) {
 107                 strlcpy(user, tmp, sizeof(user));
 108         } else {
 109                 strcpy(user, "you");
 110         }
 111
 112         color = curmove = 0;
 113
 114         prog = strrchr(argv[0], '/');
 115         if (prog)
 116                 prog++;
 117         else
 118                 prog = argv[0];
 119
 120         while ((ch = getopt(argc, argv, "bcdD:u")) != -1) {
 121                 switch (ch) {
 122                 case 'b':       /* background */
 123                         interactive = 0;
 124                         break;
 125                 case 'd':       /* debugging */
 126                         debug++;
 127                         break;
 128                 case 'D':       /* log debug output to file */
 129                         if ((debugfp = fopen(optarg, "w")) == NULL)
 130                                 err(1, "%s", optarg);
 131                         break;
 132                 case 'u':       /* testing: user versus user */
 133                         test = 1;
 134                         break;
 135                 case 'c':       /* testing: computer versus computer */
 136                         test = 2;
 137                         break;
 138                 }
 139         }
 140         argc -= optind;
 141         argv += optind;
 142         if (argc) {
 143                 if ((inputfp = fopen(*argv, "r")) == NULL)
 144                         err(1, "%s", *argv);
 145         }
 146
 147         if (!debug)
 148                 srandom(time(0));
 149         if (interactive)
 150                 cursinit();             /* initialize curses */
 151 again:
 152         bdinit(board);                  /* initialize board contents */
 153
 154         if (interactive) {
 155                 plyr[BLACK] = plyr[WHITE] = "???";
 156                 bdisp_init();           /* initialize display of board */
 157 #ifdef DEBUG
 158                 signal(SIGINT, whatsup);
 159 #else
 160                 signal(SIGINT, quitsig);
 161 #endif
 162
 163                 if (inputfp == NULL && test == 0) {
 164                         move(BSZ3, 0);
 165                         printw("Black moves first. ");
 166                         ask("(B)lack or (W)hite? ");
 167                         for (;;) {
 168                                 ch = get_key(NULL);
 169                                 if (ch == 'b' || ch == 'B') {
 170                                         color = BLACK;
 171                                         break;
 172                                 }
 173                                 if (ch == 'w' || ch == 'W') {
 174                                         color = WHITE;
 175                                         break;
 176                                 }
 177                                 if (ch == 'q' || ch == 'Q') {
 178                                         quit();
 179                                 }
 180                                 beep();
 181                                 ask("Please choose (B)lack or (W)hite: ");
 182                         }
 183                         move(BSZ3, 0);
 184                         clrtoeol();
 185                 }
 186         } else {
 187                 setbuf(stdout, 0);
 188                 get_line(buf, sizeof(buf));
 189                 if (strcmp(buf, "black") == 0)
 190                         color = BLACK;
 191                 else if (strcmp(buf, "white") == 0)
 192                         color = WHITE;
 193                 else {
 194                         panic("Huh?  Expected `black' or `white', got `%s'\n",
 195                             buf);
 196                 }
 197         }
 198
 199         if (inputfp) {
 200                 input[BLACK] = INPUTF;
 201                 input[WHITE] = INPUTF;
 202         } else {
 203                 switch (test) {
 204                 case 0: /* user versus program */
 205                         input[color] = USER;
 206                         input[!color] = PROGRAM;
 207                         break;
 208
 209                 case 1: /* user versus user */
 210                         input[BLACK] = USER;
 211                         input[WHITE] = USER;
 212                         break;
 213
 214                 case 2: /* program versus program */
 215                         input[BLACK] = PROGRAM;
 216                         input[WHITE] = PROGRAM;
 217                         break;
 218                 }
 219         }
 220         if (interactive) {
 221                 plyr[BLACK] = input[BLACK] == USER ? user : prog;
 222                 plyr[WHITE] = input[WHITE] == USER ? user : prog;
 223                 bdwho(1);
 224         }
 225
 226         for (color = BLACK; ; color = !color) {
 227         top:
 228                 switch (input[color]) {
 229                 case INPUTF: /* input comes from a file */
 230                         curmove = readinput(inputfp);
 231                         if (curmove != ILLEGAL)
 232                                 break;
 233                         switch (test) {
 234                         case 0: /* user versus program */
 235                                 input[color] = USER;
 236                                 input[!color] = PROGRAM;
 237                                 break;
 238
 239                         case 1: /* user versus user */
 240                                 input[BLACK] = USER;
 241                                 input[WHITE] = USER;
 242                                 break;
 243
 244                         case 2: /* program versus program */
 245                                 input[BLACK] = PROGRAM;
 246                                 input[WHITE] = PROGRAM;
 247                                 break;
 248                         }
 249                         plyr[BLACK] = input[BLACK] == USER ? user : prog;
 250                         plyr[WHITE] = input[WHITE] == USER ? user : prog;
 251                         bdwho(1);
 252                         goto top;
 253
 254                 case USER: /* input comes from standard input */
 255                 getinput:
 256                         if (interactive) {
 257                                 ask("Select move, (S)ave or (Q)uit.");
 258                                 curmove = get_coord();
 259                                 if (curmove == SAVE) {
 260                                         FILE *fp;
 261
 262                                         ask("Save file name? ");
 263                                         (void)get_line(fname, sizeof(fname));
 264                                         if ((fp = fopen(fname, "w")) == NULL) {
 265                                                 misclog("cannot create save file");
 266                                                 goto getinput;
 267                                         }
 268                                         for (i = 0; i < movenum - 1; i++)
 269                                                 fprintf(fp, "%s\n",
 270                                                         stoc(movelog[i]));
 271                                         fclose(fp);
 272                                         goto getinput;
 273                                 }
 274                                 if (curmove != RESIGN &&
 275                                     board[curmove].s_occ != EMPTY) {
 276                                         /*misclog("Illegal move");*/
 277                                         beep();
 278                                         goto getinput;
 279                                 }
 280                         } else {
 281                                 if (!get_line(buf, sizeof(buf))) {
 282                                         curmove = RESIGN;
 283                                         break;
 284                                 }
 285                                 if (buf[0] == '\0')
 286                                         goto getinput;
 287                                 curmove = ctos(buf);
 288                         }
 289                         break;
 290
 291                 case PROGRAM: /* input comes from the program */
 292                         if (interactive)
 293                                 ask("Thinking...");
 294                         curmove = pickmove(color);
 295                         break;
 296                 }
 297                 if (interactive) {
 298                         misclog(fmt[color], movenum, stoc(curmove));
 299                 }
 300                 if ((i = makemove(color, curmove)) != MOVEOK)
 301                         break;
 302                 if (interactive)
 303                         bdisp();
 304         }
 305         if (interactive) {
 306                 move(BSZ3, 0);
 307                 switch (i) {
 308                 case WIN:
 309                         if (input[color] == PROGRAM)
 310                                 addstr("Ha ha, I won");
 311                         else if (input[0] == USER && input[1] == USER)
 312                                 addstr("Well, you won (and lost)");
 313                         else
 314                                 addstr("Rats! you won");
 315                         break;
 316                 case TIE:
 317                         addstr("Wow! It's a tie");
 318                         break;
 319                 case ILLEGAL:
 320                         addstr("Illegal move");
 321                         break;
 322                 }
 323                 clrtoeol();
 324                 bdisp();
 325                 if (i != RESIGN) {
 326                 replay:
 327                         ask("Play again? ");
 328                         ch = get_key("YyNnQqSs");
 329                         if (ch == 'Y' || ch == 'y')
 330                                 goto again;
 331                         if (ch == 'S') {
 332                                 FILE *fp;
 333
 334                                 ask("Save file name? ");
 335                                 (void)get_line(fname, sizeof(fname));
 336                                 if ((fp = fopen(fname, "w")) == NULL) {
 337                                         misclog("cannot create save file");
 338                                         goto replay;
 339                                 }
 340                                 for (i = 0; i < movenum - 1; i++)
 341                                         fprintf(fp, "%s\n",
 342                                                 stoc(movelog[i]));
 343                                 fclose(fp);
 344                                 goto replay;
 345                         }
 346                 }
 347         }
 348         quit();
 349         /* NOTREACHED */
 350         return(0);
 351 }
 352
 353 static int
 354 readinput(FILE *fp)
 355 {
 356         int c;
 357         char buf[128];
 358         size_t pos;
 359
 360         pos = 0;
 361         while ((c = getc(fp)) != EOF && c != '\n' && pos < sizeof(buf) - 1)
 362                 buf[pos++] = c;
 363         buf[pos] = '\0';
 364         return ctos(buf);
 365 }
 366
 367 #ifdef DEBUG
 368 /*
 369  * Handle strange situations.
 370  */
 371 void
 372 whatsup(int signum)
 373 {
 374         int i, n, s1, s2, d1, d2;
 375         struct spotstr *sp;
 376         FILE *fp;
 377         char *str;
 378         struct elist *ep;
 379         struct combostr *cbp;
 380         char input[128];
 381         char tmp[128];
 382
 383         if (!interactive)
 384                 quit();
 385 top:
 386         ask("debug command: ");
 387         if (!get_line(input, sizeof(input)))
 388                 quit();
 389         switch (*input) {
 390         case '\0':
 391                 goto top;
 392         case 'q':               /* conservative quit */
 393                 quit();
 394         case 'd':               /* set debug level */
 395                 debug = input[1] - '0';
 396                 debuglog("Debug set to %d", debug);
 397                 sleep(1);
 398         case 'c':
 399                 break;
 400         case 'b':               /* back up a move */
 401                 if (movenum > 1) {
 402                         movenum--;
 403                         board[movelog[movenum - 1]].s_occ = EMPTY;
 404                         bdisp();
 405                 }
 406                 goto top;
 407         case 's':               /* suggest a move */
 408                 i = input[1] == 'b' ? BLACK : WHITE;
 409                 debuglog("suggest %c %s", i == BLACK ? 'B' : 'W',
 410                         stoc(pickmove(i)));
 411                 goto top;
 412         case 'f':               /* go forward a move */
 413                 board[movelog[movenum - 1]].s_occ = movenum & 1 ? BLACK : WHITE;
 414                 movenum++;
 415                 bdisp();
 416                 goto top;
 417         case 'l':               /* print move history */
 418                 if (input[1] == '\0') {
 419                         for (i = 0; i < movenum - 1; i++)
 420                                 debuglog("%s", stoc(movelog[i]));
 421                         goto top;
 422                 }
 423                 if ((fp = fopen(input + 1, "w")) == NULL)
 424                         goto top;
 425                 for (i = 0; i < movenum - 1; i++) {
 426                         fprintf(fp, "%s", stoc(movelog[i]));
 427                         if (++i < movenum - 1)
 428                                 fprintf(fp, " %s\n", stoc(movelog[i]));
 429                         else
 430                                 fputc('\n', fp);
 431                 }
 432                 bdump(fp);
 433                 fclose(fp);
 434                 goto top;
 435         case 'o':
 436                 /* avoid use w/o initialization on invalid input */
 437                 d1 = s1 = 0;
 438
 439                 n = 0;
 440                 for (str = input + 1; *str; str++)
 441                         if (*str == ',') {
 442                                 for (d1 = 0; d1 < 4; d1++)
 443                                         if (str[-1] == pdir[d1])
 444                                                 break;
 445                                 str[-1] = '\0';
 446                                 sp = &board[s1 = ctos(input + 1)];
 447                                 n = (sp->s_frame[d1] - frames) * FAREA;
 448                                 *str++ = '\0';
 449                                 break;
 450                         }
 451                 sp = &board[s2 = ctos(str)];
 452                 while (*str)
 453                         str++;
 454                 for (d2 = 0; d2 < 4; d2++)
 455                         if (str[-1] == pdir[d2])
 456                                 break;
 457                 n += sp->s_frame[d2] - frames;
 458                 debuglog("overlap %s%c,%s%c = %x", stoc(s1), pdir[d1],
 459                     stoc(s2), pdir[d2], overlap[n]);
 460                 goto top;
 461         case 'p':
 462                 sp = &board[i = ctos(input + 1)];
 463                 debuglog("V %s %x/%d %d %x/%d %d %d %x", stoc(i),
 464                         sp->s_combo[BLACK].s, sp->s_level[BLACK],
 465                         sp->s_nforce[BLACK],
 466                         sp->s_combo[WHITE].s, sp->s_level[WHITE],
 467                         sp->s_nforce[WHITE], sp->s_wval, sp->s_flags);
 468                 debuglog("FB %s %x %x %x %x", stoc(i),
 469                         sp->s_fval[BLACK][0].s, sp->s_fval[BLACK][1].s,
 470                         sp->s_fval[BLACK][2].s, sp->s_fval[BLACK][3].s);
 471                 debuglog("FW %s %x %x %x %x", stoc(i),
 472                         sp->s_fval[WHITE][0].s, sp->s_fval[WHITE][1].s,
 473                         sp->s_fval[WHITE][2].s, sp->s_fval[WHITE][3].s);
 474                 goto top;
 475         case 'e':       /* e {b|w} [0-9] spot */
 476                 str = input + 1;
 477                 if (*str >= '0' && *str <= '9')
 478                         n = *str++ - '0';
 479                 else
 480                         n = 0;
 481                 sp = &board[i = ctos(str)];
 482                 for (ep = sp->s_empty; ep; ep = ep->e_next) {
 483                         cbp = ep->e_combo;
 484                         if (n) {
 485                                 if (cbp->c_nframes > n)
 486                                         continue;
 487                                 if (cbp->c_nframes != n)
 488                                         break;
 489                         }
 490                         printcombo(cbp, tmp, sizeof(tmp));
 491                         debuglog("%s", tmp);
 492                 }
 493                 goto top;
 494         default:
 495                 debuglog("Options are:");
 496                 debuglog("q    - quit");
 497                 debuglog("c    - continue");
 498                 debuglog("d#   - set debug level to #");
 499                 debuglog("p#   - print values at #");
 500                 goto top;
 501         }
 502 }
 503 #endif /* DEBUG */
 504
 505 /*
 506  * Display debug info.
 507  */
 508 void
 509 debuglog(const char *fmt, ...)
 510 {
 511         va_list ap;
 512         char buf[128];
 513
 514         va_start(ap, fmt);
 515         vsnprintf(buf, sizeof(buf), fmt, ap);
 516         va_end(ap);
 517
 518         if (debugfp)
 519                 fprintf(debugfp, "%s\n", buf);
 520         if (interactive)
 521                 dislog(buf);
 522         else
 523                 fprintf(stderr, "%s\n", buf);
 524 }
 525
 526 static void
 527 misclog(const char *fmt, ...)
 528 {
 529         va_list ap;
 530         char buf[128];
 531
 532         va_start(ap, fmt);
 533         vsnprintf(buf, sizeof(buf), fmt, ap);
 534         va_end(ap);
 535
 536         if (debugfp)
 537                 fprintf(debugfp, "%s\n", buf);
 538         if (interactive)
 539                 dislog(buf);
 540         else
 541                 printf("%s\n", buf);
 542 }
 543
 544 static void
 545 quit(void)
 546 {
 547         if (interactive) {
 548                 bdisp();                /* show final board */
 549                 cursfini();
 550         }
 551         exit(0);
 552 }
 553
 554 static void
 555 quitsig(int dummy __unused)
 556 {
 557         quit();
 558 }
 559
 560 /*
 561  * Die gracefully.
 562  */
 563 void
 564 panic(const char *fmt, ...)
 565 {
 566         va_list ap;
 567
 568         fprintf(stderr, "%s: ", prog);
 569         va_start(ap, fmt);
 570         vfprintf(stderr, fmt, ap);
 571         va_end(ap);
 572         fprintf(stderr, "\n");
 573
 574         fputs("resign\n", stdout);
 575         quit();
 576 }