games/backgammon/common_source/subs.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)subs.c   8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/backgammon/common_source/subs.c,v 1.12 1999/11/30 03:48:27 billf Exp $
  31  */
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include "back.h"
  37
  38 int     buffnum;
  39 char    outbuff[BUFSIZ];
  40
  41 static const char       plred[] = "Player is red, computer is white.";
  42 static const char       plwhite[] = "Player is white, computer is red.";
  43 static const char       nocomp[] = "(No computer play.)";
  44
  45 const char  *const descr[] = {
  46         "Usage:  backgammon [-h n r w b pr pw pb tterm sfile]\n",
  47         "\t-h\tgets this list\n\t-n\tdon't ask for rules or instructions",
  48         "\t-r\tplayer is red (implies -n)\n\t-w\tplayer is white (implies -n)",
  49         "\t-b\ttwo players, red and white (implies -n)",
  50         "\t-pr\tprint the board before red's turn",
  51         "\t-pw\tprint the board before white's turn",
  52         "\t-pb\tprint the board before both players' turn",
  53         "\t-tterm\tterminal is a term",
  54         "\t-sfile\trecover saved game from file",
  55         0
  56 };
  57
  58 void
  59 errexit(const char *s)
  60 {
  61         write(2, "\n", 1);
  62         perror(s);
  63         getout(0);
  64 }
  65
  66 int
  67 addbuf(int c)
  68 {
  69         buffnum++;
  70         if (buffnum == BUFSIZ) {
  71                 if (write(1, outbuff, BUFSIZ) != BUFSIZ)
  72                         errexit("addbuf (write):");
  73                 buffnum = 0;
  74         }
  75         outbuff[buffnum] = c;
  76         return (0);
  77 }
  78
  79 void
  80 buflush(void)
  81 {
  82         if (buffnum < 0)
  83                 return;
  84         buffnum++;
  85         if (write(1, outbuff, buffnum) != buffnum)
  86                 errexit("buflush (write):");
  87         buffnum = -1;
  88 }
  89
  90 char
  91 readc(void)
  92 {
  93         char c;
  94
  95         if (tflag) {
  96                 cline();
  97                 newpos();
  98         }
  99         buflush();
 100         if (read(0, &c, 1) != 1)
 101                 errexit("readc");
 102 #ifdef WHY_IS_THIS_HARDWIRED_IN_HERE
 103         if (c == '\177')
 104                 getout(0);
 105 #endif
 106         if (c == '\033' || c == '\015')
 107                 return ('\n');
 108         if (cflag)
 109                 return (c);
 110         if (c == '\014')
 111                 return ('R');
 112         if (c >= 'a' && c <= 'z')
 113                 return (c & 0137);
 114         return (c);
 115 }
 116
 117 void
 118 writec(char c)
 119 {
 120         if (tflag)
 121                 fancyc(c);
 122         else
 123                 addbuf(c);
 124 }
 125
 126 void
 127 writel(const char *l)
 128 {
 129 #ifdef DEBUG
 130         const char *s;
 131
 132         if (trace == NULL)
 133                 trace = fopen("bgtrace", "w");
 134
 135         fprintf(trace, "writel: \"");
 136         for (s = l; *s; s++) {
 137                 if (*s < ' ' || *s == '\177')
 138                         fprintf(trace, "^%c", (*s) ^ 0100);
 139                 else
 140                         putc(*s, trace);
 141         }
 142         fprintf(trace, "\"\n");
 143         fflush(trace);
 144 #endif
 145
 146         while (*l)
 147                 writec(*l++);
 148 }
 149
 150 void
 151 proll(void)
 152 {
 153         if (d0)
 154                 swap;
 155         if (cturn == 1)
 156                 writel("Red's roll:  ");
 157         else
 158                 writel("White's roll:  ");
 159         writec(D0 + '0');
 160         writec('\040');
 161         writec(D1 + '0');
 162         if (tflag)
 163                 cline();
 164 }
 165
 166 void
 167 wrint(int n)
 168 {
 169         int i, j, t;
 170
 171         for (i = 4; i > 0; i--) {
 172                 t = 1;
 173                 for (j = 0; j < i; j++)
 174                         t *= 10;
 175                 if (n > t - 1)
 176                         writec((n / t) % 10 + '0');
 177         }
 178         writec(n % 10 + '0');
 179 }
 180
 181 void
 182 gwrite(void)
 183 {
 184         int r, c;
 185
 186         r = curr;
 187         c = curc;
 188
 189         if (tflag)
 190                 curmove(16, 0);
 191
 192         if (gvalue > 1) {
 193                 writel("Game value:  ");
 194                 wrint(gvalue);
 195                 writel(".  ");
 196                 if (dlast == -1)
 197                         writel(color[0]);
 198                 else
 199                         writel(color[1]);
 200                 writel(" doubled last.");
 201         } else {
 202                 switch (pnum) {
 203                 case -1:                /* player is red */
 204                         writel(plred);
 205                         break;
 206                 case 0:                 /* player is both colors */
 207                         writel(nocomp);
 208                         break;
 209                 case 1:                 /* player is white */
 210                         writel(plwhite);
 211                 }
 212         }
 213
 214         if (rscore || wscore) {
 215                 writel("  ");
 216                 wrscore();
 217         }
 218         if (tflag) {
 219                 cline();
 220                 curmove(r, c);
 221         }
 222 }
 223
 224 int
 225 quit(void)
 226 {
 227         if (tflag) {
 228                 curmove(20, 0);
 229                 clend();
 230         } else
 231                 writec('\n');
 232         writel("Are you sure you want to quit?");
 233         if (yorn(0)) {
 234                 if (rfl) {
 235                         writel("Would you like to save this game?");
 236                         if (yorn(0))
 237                                 save(0);
 238                 }
 239                 cturn = 0;
 240                 return (1);
 241         }
 242         return (0);
 243 }
 244
 245 int
 246 yorn(char special)
 247 {
 248         char c;
 249         int i;
 250
 251         i = 1;
 252         while ((c = readc()) != 'Y' && c != 'N') {
 253                 if (special && c == special)
 254                         return (2);
 255                 if (i) {
 256                         if (special) {
 257                                 writel("  (Y, N, or ");
 258                                 writec(special);
 259                                 writec(')');
 260                         } else
 261                                 writel("  (Y or N)");
 262                         i = 0;
 263                 } else
 264                         writec('\007');
 265         }
 266         if (c == 'Y')
 267                 writel("  Yes.\n");
 268         else
 269                 writel("  No.\n");
 270         if (tflag)
 271                 buflush();
 272         return (c == 'Y');
 273 }
 274
 275 void
 276 wrhit(int i)
 277 {
 278         writel("Blot hit on ");
 279         wrint(i);
 280         writec('.');
 281         writec('\n');
 282 }
 283
 284 void
 285 nexturn(void)
 286 {
 287         int c;
 288
 289         cturn = -cturn;
 290         c = cturn / abs(cturn);
 291         home = bar;
 292         bar = 25 - bar;
 293         offptr += c;
 294         offopp -= c;
 295         inptr += c;
 296         inopp -= c;
 297         Colorptr += c;
 298         colorptr += c;
 299 }
 300
 301 void
 302 getarg(int argc, char **argv)
 303 {
 304         char ch;
 305         int i;
 306
 307         /* process arguments here.  dashes are ignored, nbrw are ignored if
 308          * the game is being recovered */
 309
 310         while ((ch = getopt(argc, argv, "nbrwp:t:s:h")) != -1) {
 311                 switch (ch) {
 312                 /* don't ask if rules or instructions needed */
 313                 case 'n':
 314                         if (rflag)
 315                                 break;
 316                         aflag = 0;
 317                         args[acnt++] = strdup("-n");
 318                         break;
 319
 320                 /* player is both red and white */
 321                 case 'b':
 322                         if (rflag)
 323                                 break;
 324                         pnum = 0;
 325                         aflag = 0;
 326                         args[acnt++] = strdup("-b");
 327                         break;
 328
 329                 /* player is red */
 330                 case 'r':
 331                         if (rflag)
 332                                 break;
 333                         pnum = -1;
 334                         aflag = 0;
 335                         args[acnt++] = strdup("-r");
 336                         break;
 337
 338                 /* player is white */
 339                 case 'w':
 340                         if (rflag)
 341                                 break;
 342                         pnum = 1;
 343                         aflag = 0;
 344                         args[acnt++] = strdup("-w");
 345                         break;
 346
 347                 /* print board after move according to following character */
 348                 case 'p':
 349                         if (optarg[0] != 'r' && optarg[0] != 'w' &&
 350                             optarg[0] != 'b')
 351                                 break;
 352                         args[acnt] = strdup("-p ");
 353                         args[acnt++][2] = optarg[0];
 354                         if (optarg[0] == 'r')
 355                                 bflag = 1;
 356                         if (optarg[0] == 'w')
 357                                 bflag = -1;
 358                         if (optarg[0] == 'b')
 359                                 bflag = 0;
 360                         break;
 361
 362                 case 't':
 363                         tflag = getcaps(optarg);
 364                         break;
 365
 366                 case 's':
 367                         /* recover file */
 368                         recover(optarg);
 369                         break;
 370                 case 'h':
 371                         for (i = 0; descr[i] != NULL; i++)
 372                                 puts(descr[i]);
 373                         getout(0);
 374                 }
 375         }
 376         argc -= optind;
 377         argv += optind;
 378         if (argc && argv[0][0] != '\0')
 379                 recover(argv[0]);
 380 }
 381
 382 void
 383 init(void)
 384 {
 385         int i;
 386
 387         for (i = 0; i < 26; )
 388                 board[i++] = 0;
 389         board[1] = 2;
 390         board[6] = board[13] = -5;
 391         board[8] = -3;
 392         board[12] = board[19] = 5;
 393         board[17] = 3;
 394         board[24] = -2;
 395         off[0] = off[1] = -15;
 396         in[0] = in[1] = 5;
 397         gvalue = 1;
 398         dlast = 0;
 399 }
 400
 401 void
 402 wrscore(void)
 403 {
 404         writel("Score:  ");
 405         writel(color[1]);
 406         writec(' ');
 407         wrint(rscore);
 408         writel(", ");
 409         writel(color[0]);
 410         writec(' ');
 411         wrint(wscore);
 412 }
 413
 414 void
 415 fixtty(int mode)
 416 {
 417         if (tflag)
 418                 newpos();
 419         buflush();
 420         tty.c_lflag = mode;
 421         if (tcsetattr(0, TCSANOW, &tty) < 0)
 422                 errexit("fixtty");
 423 }
 424
 425 void
 426 getout(__unused int sig)
 427 {
 428         /* go to bottom of screen */
 429         if (tflag) {
 430                 curmove(23, 0);
 431                 cline();
 432         } else
 433                 writec('\n');
 434
 435         /* fix terminal status */
 436         fixtty(old);
 437         exit(0);
 438 }
 439
 440 void
 441 roll(void)
 442 {
 443         char c;
 444         int row;
 445         int col;
 446
 447         if (iroll) {
 448                 row = curr;
 449                 col = curc;
 450                 if (tflag)
 451                         curmove(17, 0);
 452                 else
 453                         writec('\n');
 454                 writel("ROLL: ");
 455                 c = readc();
 456                 if (c != '\n') {
 457                         while (c < '1' || c > '6')
 458                                 c = readc();
 459                         D0 = c - '0';
 460                         writec(' ');
 461                         writec(c);
 462                         c = readc();
 463                         while (c < '1' || c > '6')
 464                                 c = readc();
 465                         D1 = c - '0';
 466                         writec(' ');
 467                         writec(c);
 468                         if (tflag) {
 469                                 curmove(17, 0);
 470                                 cline();
 471                                 curmove(row, col);
 472                         } else
 473                                 writec('\n');
 474                         return;
 475                 }
 476                 if (tflag) {
 477                         curmove(17, 0);
 478                         cline();
 479                         curmove(row, col);
 480                 } else
 481                         writec('\n');
 482         }
 483         D0 = rnum(6) + 1;
 484         D1 = rnum(6) + 1;
 485         d0 = 0;
 486 }