gomoku/main.c

   1 /*      $NetBSD: main.c,v 1.21 2010/03/29 02:46:05 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 1.21 2010/03/29 02:46:05 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 FILE *debugfp;           /* file for debug output */
  70 static FILE *inputfp;           /* file for debug input */
  71
  72 const char      pdir[4]         = "-\\|/";
  73
  74 struct  spotstr board[BAREA];           /* info for board */
  75 struct  combostr frames[FAREA];         /* storage for all frames */
  76 struct  combostr *sortframes[2];        /* sorted list of non-empty frames */
  77 u_char  overlap[FAREA * FAREA];         /* true if frame [a][b] overlap */
  78 short   intersect[FAREA * FAREA];       /* frame [a][b] intersection */
  79 int     movelog[BSZ * BSZ];             /* log of all the moves */
  80 int     movenum;                        /* current move number */
  81 const char      *plyr[2];                       /* who's who */
  82
  83 static int readinput(FILE *);
  84 static void misclog(const char *, ...) __printflike(1, 2);
  85 static void quit(void) __dead;
  86 static void quitsig(int) __dead;
  87
  88 int
  89 main(int argc, char **argv)
  90 {
  91         char buf[128];
  92         char fname[PATH_MAX];
  93         int color, curmove, i, ch;
  94         int input[2];
  95         static const char *const fmt[2] = {
  96                 "%3d %-6s",
  97                 "%3d        %-6s"
  98         };
  99
 100         /* Revoke setgid privileges */
 101         setgid(getgid());
 102
 103         color = curmove = 0;
 104
 105         prog = strrchr(argv[0], '/');
 106         if (prog)
 107                 prog++;
 108         else
 109                 prog = argv[0];
 110
 111         while ((ch = getopt(argc, argv, "bcdD:u")) != -1) {
 112                 switch (ch) {
 113                 case 'b':       /* background */
 114                         interactive = 0;
 115                         break;
 116                 case 'd':       /* debugging */
 117                         debug++;
 118                         break;
 119                 case 'D':       /* log debug output to file */
 120                         if ((debugfp = fopen(optarg, "w")) == NULL)
 121                                 err(1, "%s", optarg);
 122                         break;
 123                 case 'u':       /* testing: user verses user */
 124                         test = 1;
 125                         break;
 126                 case 'c':       /* testing: computer verses computer */
 127                         test = 2;
 128                         break;
 129                 }
 130         }
 131         argc -= optind;
 132         argv += optind;
 133         if (argc) {
 134                 if ((inputfp = fopen(*argv, "r")) == NULL)
 135                         err(1, "%s", *argv);
 136         }
 137
 138         if (!debug)
 139 #ifdef SVR4
 140                 srand(time(0));
 141 #else
 142                 srandom(time(0));
 143 #endif
 144         if (interactive)
 145                 cursinit();             /* initialize curses */
 146 again:
 147         bdinit(board);                  /* initialize board contents */
 148
 149         if (interactive) {
 150                 plyr[BLACK] = plyr[WHITE] = "???";
 151                 bdisp_init();           /* initialize display of board */
 152 #ifdef DEBUG
 153                 signal(SIGINT, whatsup);
 154 #else
 155                 signal(SIGINT, quitsig);
 156 #endif
 157
 158                 if (inputfp == NULL && test == 0) {
 159                         for (;;) {
 160                                 ask("black or white? ");
 161                                 get_line(buf, sizeof(buf));
 162                                 if (buf[0] == 'b' || buf[0] == 'B') {
 163                                         color = BLACK;
 164                                         break;
 165                                 }
 166                                 if (buf[0] == 'w' || buf[0] == 'W') {
 167                                         color = WHITE;
 168                                         break;
 169                                 }
 170                                 move(22, 0);
 171                                 printw("Black moves first. Please enter `black' or `white'\n");
 172                         }
 173                         move(22, 0);
 174                         clrtoeol();
 175                 }
 176         } else {
 177                 setbuf(stdout, 0);
 178                 get_line(buf, sizeof(buf));
 179                 if (strcmp(buf, "black") == 0)
 180                         color = BLACK;
 181                 else if (strcmp(buf, "white") == 0)
 182                         color = WHITE;
 183                 else {
 184                         panic("Huh?  Expected `black' or `white', got `%s'\n",
 185                             buf);
 186                 }
 187         }
 188
 189         if (inputfp) {
 190                 input[BLACK] = INPUTF;
 191                 input[WHITE] = INPUTF;
 192         } else {
 193                 switch (test) {
 194                 case 0: /* user verses program */
 195                         input[color] = USER;
 196                         input[!color] = PROGRAM;
 197                         break;
 198
 199                 case 1: /* user verses user */
 200                         input[BLACK] = USER;
 201                         input[WHITE] = USER;
 202                         break;
 203
 204                 case 2: /* program verses program */
 205                         input[BLACK] = PROGRAM;
 206                         input[WHITE] = PROGRAM;
 207                         break;
 208                 }
 209         }
 210         if (interactive) {
 211                 plyr[BLACK] = input[BLACK] == USER ? "you" : prog;
 212                 plyr[WHITE] = input[WHITE] == USER ? "you" : prog;
 213                 bdwho(1);
 214         }
 215
 216         for (color = BLACK; ; color = !color) {
 217         top:
 218                 switch (input[color]) {
 219                 case INPUTF: /* input comes from a file */
 220                         curmove = readinput(inputfp);
 221                         if (curmove != ILLEGAL)
 222                                 break;
 223                         switch (test) {
 224                         case 0: /* user verses program */
 225                                 input[color] = USER;
 226                                 input[!color] = PROGRAM;
 227                                 break;
 228
 229                         case 1: /* user verses user */
 230                                 input[BLACK] = USER;
 231                                 input[WHITE] = USER;
 232                                 break;
 233
 234                         case 2: /* program verses program */
 235                                 input[BLACK] = PROGRAM;
 236                                 input[WHITE] = PROGRAM;
 237                                 break;
 238                         }
 239                         plyr[BLACK] = input[BLACK] == USER ? "you" : prog;
 240                         plyr[WHITE] = input[WHITE] == USER ? "you" : prog;
 241                         bdwho(1);
 242                         goto top;
 243
 244                 case USER: /* input comes from standard input */
 245                 getinput:
 246                         if (interactive)
 247                                 ask("move? ");
 248                         if (!get_line(buf, sizeof(buf))) {
 249                                 curmove = RESIGN;
 250                                 break;
 251                         }
 252                         if (buf[0] == '\0')
 253                                 goto getinput;
 254                         curmove = ctos(buf);
 255                         if (interactive) {
 256                                 if (curmove == SAVE) {
 257                                         FILE *fp;
 258
 259                                         ask("save file name? ");
 260                                         (void)get_line(fname, sizeof(fname));
 261                                         if ((fp = fopen(fname, "w")) == NULL) {
 262                                                 misclog("cannot create save file");
 263                                                 goto getinput;
 264                                         }
 265                                         for (i = 0; i < movenum - 1; i++)
 266                                                 fprintf(fp, "%s\n",
 267                                                         stoc(movelog[i]));
 268                                         fclose(fp);
 269                                         goto getinput;
 270                                 }
 271                                 if (curmove != RESIGN &&
 272                                     board[curmove].s_occ != EMPTY) {
 273                                         misclog("Illegal move");
 274                                         goto getinput;
 275                                 }
 276                         }
 277                         break;
 278
 279                 case PROGRAM: /* input comes from the program */
 280                         curmove = pickmove(color);
 281                         break;
 282                 }
 283                 if (interactive) {
 284                         misclog(fmt[color], movenum, stoc(curmove));
 285                 }
 286                 if ((i = makemove(color, curmove)) != MOVEOK)
 287                         break;
 288                 if (interactive)
 289                         bdisp();
 290         }
 291         if (interactive) {
 292                 move(22, 0);
 293                 switch (i) {
 294                 case WIN:
 295                         if (input[color] == PROGRAM)
 296                                 addstr("Ha ha, I won");
 297                         else
 298                                 addstr("Rats! you won");
 299                         break;
 300                 case TIE:
 301                         addstr("Wow! its a tie");
 302                         break;
 303                 case ILLEGAL:
 304                         addstr("Illegal move");
 305                         break;
 306                 }
 307                 clrtoeol();
 308                 bdisp();
 309                 if (i != RESIGN) {
 310                 replay:
 311                         ask("replay? ");
 312                         if (get_line(buf, sizeof(buf)) &&
 313                             (buf[0] == 'y' || buf[0] == 'Y'))
 314                                 goto again;
 315                         if (strcmp(buf, "save") == 0) {
 316                                 FILE *fp;
 317
 318                                 ask("save file name? ");
 319                                 (void)get_line(fname, sizeof(fname));
 320                                 if ((fp = fopen(fname, "w")) == NULL) {
 321                                         misclog("cannot create save file");
 322                                         goto replay;
 323                                 }
 324                                 for (i = 0; i < movenum - 1; i++)
 325                                         fprintf(fp, "%s\n",
 326                                                 stoc(movelog[i]));
 327                                 fclose(fp);
 328                                 goto replay;
 329                         }
 330                 }
 331         }
 332         quit();
 333         /* NOTREACHED */
 334         return(0);
 335 }
 336
 337 static int
 338 readinput(FILE *fp)
 339 {
 340         int c;
 341         char buf[128];
 342         size_t pos;
 343
 344         pos = 0;
 345         while ((c = getc(fp)) != EOF && c != '\n' && pos < sizeof(buf) - 1)
 346                 buf[pos++] = c;
 347         buf[pos] = '\0';
 348         return ctos(buf);
 349 }
 350
 351 #ifdef DEBUG
 352 /*
 353  * Handle strange situations.
 354  */
 355 void
 356 whatsup(int signum)
 357 {
 358         int i, n, s1, s2, d1, d2;
 359         struct spotstr *sp;
 360         FILE *fp;
 361         char *str;
 362         struct elist *ep;
 363         struct combostr *cbp;
 364         char input[128];
 365         char tmp[128];
 366
 367         if (!interactive)
 368                 quit();
 369 top:
 370         ask("cmd? ");
 371         if (!get_line(input, sizeof(input)))
 372                 quit();
 373         switch (*input) {
 374         case '\0':
 375                 goto top;
 376         case 'q':               /* conservative quit */
 377                 quit();
 378         case 'd':               /* set debug level */
 379                 debug = input[1] - '0';
 380                 debuglog("Debug set to %d", debug);
 381                 sleep(1);
 382         case 'c':
 383                 break;
 384         case 'b':               /* back up a move */
 385                 if (movenum > 1) {
 386                         movenum--;
 387                         board[movelog[movenum - 1]].s_occ = EMPTY;
 388                         bdisp();
 389                 }
 390                 goto top;
 391         case 's':               /* suggest a move */
 392                 i = input[1] == 'b' ? BLACK : WHITE;
 393                 debuglog("suggest %c %s", i == BLACK ? 'B' : 'W',
 394                         stoc(pickmove(i)));
 395                 goto top;
 396         case 'f':               /* go forward a move */
 397                 board[movelog[movenum - 1]].s_occ = movenum & 1 ? BLACK : WHITE;
 398                 movenum++;
 399                 bdisp();
 400                 goto top;
 401         case 'l':               /* print move history */
 402                 if (input[1] == '\0') {
 403                         for (i = 0; i < movenum - 1; i++)
 404                                 debuglog("%s", stoc(movelog[i]));
 405                         goto top;
 406                 }
 407                 if ((fp = fopen(input + 1, "w")) == NULL)
 408                         goto top;
 409                 for (i = 0; i < movenum - 1; i++) {
 410                         fprintf(fp, "%s", stoc(movelog[i]));
 411                         if (++i < movenum - 1)
 412                                 fprintf(fp, " %s\n", stoc(movelog[i]));
 413                         else
 414                                 fputc('\n', fp);
 415                 }
 416                 bdump(fp);
 417                 fclose(fp);
 418                 goto top;
 419         case 'o':
 420                 /* avoid use w/o initialization on invalid input */
 421                 d1 = s1 = 0;
 422
 423                 n = 0;
 424                 for (str = input + 1; *str; str++)
 425                         if (*str == ',') {
 426                                 for (d1 = 0; d1 < 4; d1++)
 427                                         if (str[-1] == pdir[d1])
 428                                                 break;
 429                                 str[-1] = '\0';
 430                                 sp = &board[s1 = ctos(input + 1)];
 431                                 n = (sp->s_frame[d1] - frames) * FAREA;
 432                                 *str++ = '\0';
 433                                 break;
 434                         }
 435                 sp = &board[s2 = ctos(str)];
 436                 while (*str)
 437                         str++;
 438                 for (d2 = 0; d2 < 4; d2++)
 439                         if (str[-1] == pdir[d2])
 440                                 break;
 441                 n += sp->s_frame[d2] - frames;
 442                 debuglog("overlap %s%c,%s%c = %x", stoc(s1), pdir[d1],
 443                     stoc(s2), pdir[d2], overlap[n]);
 444                 goto top;
 445         case 'p':
 446                 sp = &board[i = ctos(input + 1)];
 447                 debuglog("V %s %x/%d %d %x/%d %d %d %x", stoc(i),
 448                         sp->s_combo[BLACK].s, sp->s_level[BLACK],
 449                         sp->s_nforce[BLACK],
 450                         sp->s_combo[WHITE].s, sp->s_level[WHITE],
 451                         sp->s_nforce[WHITE], sp->s_wval, sp->s_flags);
 452                 debuglog("FB %s %x %x %x %x", stoc(i),
 453                         sp->s_fval[BLACK][0].s, sp->s_fval[BLACK][1].s,
 454                         sp->s_fval[BLACK][2].s, sp->s_fval[BLACK][3].s);
 455                 debuglog("FW %s %x %x %x %x", stoc(i),
 456                         sp->s_fval[WHITE][0].s, sp->s_fval[WHITE][1].s,
 457                         sp->s_fval[WHITE][2].s, sp->s_fval[WHITE][3].s);
 458                 goto top;
 459         case 'e':       /* e {b|w} [0-9] spot */
 460                 str = input + 1;
 461                 if (*str >= '0' && *str <= '9')
 462                         n = *str++ - '0';
 463                 else
 464                         n = 0;
 465                 sp = &board[i = ctos(str)];
 466                 for (ep = sp->s_empty; ep; ep = ep->e_next) {
 467                         cbp = ep->e_combo;
 468                         if (n) {
 469                                 if (cbp->c_nframes > n)
 470                                         continue;
 471                                 if (cbp->c_nframes != n)
 472                                         break;
 473                         }
 474                         printcombo(cbp, tmp, sizeof(tmp));
 475                         debuglog("%s", tmp);
 476                 }
 477                 goto top;
 478         default:
 479                 debuglog("Options are:");
 480                 debuglog("q    - quit");
 481                 debuglog("c    - continue");
 482                 debuglog("d#   - set debug level to #");
 483                 debuglog("p#   - print values at #");
 484                 goto top;
 485         }
 486 }
 487 #endif /* DEBUG */
 488
 489 /*
 490  * Display debug info.
 491  */
 492 void
 493 debuglog(const char *fmt, ...)
 494 {
 495         va_list ap;
 496         char buf[128];
 497
 498         va_start(ap, fmt);
 499         vsnprintf(buf, sizeof(buf), fmt, ap);
 500         va_end(ap);
 501
 502         if (debugfp)
 503                 fprintf(debugfp, "%s\n", buf);
 504         if (interactive)
 505                 dislog(buf);
 506         else
 507                 fprintf(stderr, "%s\n", buf);
 508 }
 509
 510 static void
 511 misclog(const char *fmt, ...)
 512 {
 513         va_list ap;
 514         char buf[128];
 515
 516         va_start(ap, fmt);
 517         vsnprintf(buf, sizeof(buf), fmt, ap);
 518         va_end(ap);
 519
 520         if (debugfp)
 521                 fprintf(debugfp, "%s\n", buf);
 522         if (interactive)
 523                 dislog(buf);
 524         else
 525                 printf("%s\n", buf);
 526 }
 527
 528 static void
 529 quit(void)
 530 {
 531         if (interactive) {
 532                 bdisp();                /* show final board */
 533                 cursfini();
 534         }
 535         exit(0);
 536 }
 537
 538 static void
 539 quitsig(int dummy __unused)
 540 {
 541         quit();
 542 }
 543
 544 /*
 545  * Die gracefully.
 546  */
 547 void
 548 panic(const char *fmt, ...)
 549 {
 550         va_list ap;
 551
 552         fprintf(stderr, "%s: ", prog);
 553         va_start(ap, fmt);
 554         vfprintf(stderr, fmt, ap);
 555         va_end(ap);
 556         fprintf(stderr, "\n");
 557
 558         fputs("resign\n", stdout);
 559         quit();
 560 }