1: /* 2: * Copyright (c) 1980 Regents of the University of California. 3: * All rights reserved. The Berkeley software License Agreement 4: * specifies the terms and conditions for redistribution. 5: */ 6: 7: #ifndef lint 8: char copyright[] = 9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\ 10: All rights reserved.\n"; 11: #endif not lint 12: 13: #ifndef lint 14: static char sccsid[] = "@(#)main.c 5.1 (Berkeley) 5/29/85"; 15: #endif not lint 16: 17: #include <stdio.h> 18: #include "back.h" 19: 20: #define MVPAUSE 5 /* time to sleep when stuck */ 21: #define MAXUSERS 35 /* maximum number of users */ 22: 23: char *instr[]; /* text of instructions */ 24: char *message[]; /* update message */ 25: char ospeed; /* tty output speed */ 26: 27: char *helpm[] = { /* help message */ 28: "Enter a space or newline to roll, or", 29: " R to reprint the board\tD to double", 30: " S to save the game\tQ to quit", 31: 0 32: }; 33: 34: char *contin[] = { /* pause message */ 35: "(Type a newline to continue.)", 36: "", 37: 0 38: }; 39: 40: static char user1a[] = 41: "Sorry, you cannot play backgammon when there are more than "; 42: static char user1b[] = 43: " users\non the system."; 44: static char user2a[] = 45: "\nThere are now more than "; 46: static char user2b[] = 47: " users on the system, so you cannot play\nanother game. "; 48: static char rules[] = "\nDo you want the rules of the game?"; 49: static char noteach[] = "Teachgammon not available!\n\007"; 50: static char need[] = "Do you need instructions for this program?"; 51: static char askcol[] = 52: "Enter 'r' to play red, 'w' to play white, 'b' to play both:"; 53: static char rollr[] = "Red rolls a "; 54: static char rollw[] = ". White rolls a "; 55: static char rstart[] = ". Red starts.\n"; 56: static char wstart[] = ". White starts.\n"; 57: static char toobad1[] = "Too bad, "; 58: static char unable[] = " is unable to use that roll.\n"; 59: static char toobad2[] = ". Too bad, "; 60: static char cantmv[] = " can't move.\n"; 61: static char bgammon[] = "Backgammon! "; 62: static char gammon[] = "Gammon! "; 63: static char again[] = ".\nWould you like to play again?"; 64: static char svpromt[] = "Would you like to save this game?"; 65: 66: static char password[] = "losfurng"; 67: static char pbuf[10]; 68: 69: main (argc,argv) 70: int argc; 71: char **argv; 72: 73: { 74: register int i; /* non-descript index */ 75: register int l; /* non-descript index */ 76: register char c; /* non-descript character storage */ 77: long t,time(); /* time for random num generator */ 78: 79: /* initialization */ 80: bflag = 2; /* default no board */ 81: signal (2,getout); /* trap interrupts */ 82: if (gtty (0,&tty) == -1) /* get old tty mode */ 83: errexit ("backgammon(gtty)"); 84: old = tty.sg_flags; 85: #ifdef V7 86: raw = ((noech = old & ~ECHO) | CBREAK); /* set up modes */ 87: #else 88: raw = ((noech = old & ~ECHO) | RAW); /* set up modes */ 89: #endif 90: ospeed = old.sg_ospeed; /* for termlib */ 91: 92: /* check user count */ 93: # ifdef CORY 94: if (ucount() > MAXUSERS) { 95: writel (user1a); 96: wrint (MAXUSERS); 97: writel (user1b); 98: getout(); 99: } 100: # endif 101: 102: /* get terminal 103: * capabilities, and 104: * decide if it can 105: * cursor address */ 106: tflag = getcaps (getenv ("TERM")); 107: /* use whole screen 108: * for text */ 109: if (tflag) 110: begscr = 0; 111: t = time(0); 112: srandom(t); /* 'random' seed */ 113: 114: #ifdef V7 115: while (*++argv != 0) /* process arguments */ 116: #else 117: while (*++argv != -1) /* process arguments */ 118: #endif 119: getarg (&argv); 120: args[acnt] = '\0'; 121: if (tflag) { /* clear screen */ 122: noech &= ~(CRMOD|XTABS); 123: raw &= ~(CRMOD|XTABS); 124: clear(); 125: } 126: fixtty (raw); /* go into raw mode */ 127: 128: /* check if restored 129: * game and save flag 130: * for later */ 131: if (rfl = rflag) { 132: text (message); /* print message */ 133: text (contin); 134: wrboard(); /* print board */ 135: /* if new game, pretend 136: * to be a non-restored 137: * game */ 138: if (cturn == 0) 139: rflag = 0; 140: } else { 141: rscore = wscore = 0; /* zero score */ 142: text (message); /* update message 143: * without pausing */ 144: 145: if (aflag) { /* print rules */ 146: writel (rules); 147: if (yorn(0)) { 148: 149: fixtty (old); /* restore tty */ 150: execl (TEACH,"backgammon",args,0); 151: 152: tflag = 0; /* error! */ 153: writel (noteach); 154: exit(); 155: } else { /* if not rules, then 156: * instructions */ 157: writel (need); 158: if (yorn(0)) { /* print instructions */ 159: clear(); 160: text (instr); 161: } 162: } 163: } 164: 165: init(); /* initialize board */ 166: 167: if (pnum == 2) { /* ask for color(s) */ 168: writec ('\n'); 169: writel (askcol); 170: while (pnum == 2) { 171: c = readc(); 172: switch (c) { 173: 174: case 'R': /* red */ 175: pnum = -1; 176: break; 177: 178: case 'W': /* white */ 179: pnum = 1; 180: break; 181: 182: case 'B': /* both */ 183: pnum = 0; 184: break; 185: 186: case 'P': 187: if (iroll) 188: break; 189: if (tflag) 190: curmove (curr,0); 191: else 192: writec ('\n'); 193: writel ("Password:"); 194: signal (14,getout); 195: cflag = 1; 196: alarm (10); 197: for (i = 0; i < 10; i++) { 198: pbuf[i] = readc(); 199: if (pbuf[i] == '\n') 200: break; 201: } 202: if (i == 10) 203: while (readc() != '\n'); 204: alarm (0); 205: cflag = 0; 206: if (i < 10) 207: pbuf[i] = '\0'; 208: for (i = 0; i < 9; i++) 209: if (pbuf[i] != password[i]) 210: getout(); 211: iroll = 1; 212: if (tflag) 213: curmove (curr,0); 214: else 215: writec ('\n'); 216: writel (askcol); 217: break; 218: 219: default: /* error */ 220: writec ('\007'); 221: } 222: } 223: } else if (!aflag) 224: /* pause to read 225: * message */ 226: text (contin); 227: 228: wrboard(); /* print board */ 229: 230: if (tflag) 231: curmove (18,0); 232: else 233: writec ('\n'); 234: } 235: /* limit text to bottom 236: * of screen */ 237: if (tflag) 238: begscr = 17; 239: 240: for (;;) { /* begin game! */ 241: /* initial roll if 242: * needed */ 243: if ((! rflag) || raflag) 244: roll(); 245: 246: /* perform ritual of 247: * first roll */ 248: if (! rflag) { 249: if (tflag) 250: curmove (17,0); 251: while (D0 == D1) /* no doubles */ 252: roll(); 253: 254: /* print rolls */ 255: writel (rollr); 256: writec (D0+'0'); 257: writel (rollw); 258: writec (D1+'0'); 259: 260: /* winner goes first */ 261: if (D0 > D1) { 262: writel (rstart); 263: cturn = 1; 264: } else { 265: writel (wstart); 266: cturn = -1; 267: } 268: } 269: 270: /* initalize variables 271: * according to whose 272: * turn it is */ 273: 274: if (cturn == 1) { /* red */ 275: home = 25; 276: bar = 0; 277: inptr = &in[1]; 278: inopp = &in[0]; 279: offptr = &off[1]; 280: offopp = &off[0]; 281: Colorptr = &color[1]; 282: colorptr = &color[3]; 283: colen = 3; 284: } else { /* white */ 285: home = 0; 286: bar = 25; 287: inptr = &in[0]; 288: inopp = &in[1]; 289: offptr = &off[0]; 290: offopp = &off[1]; 291: Colorptr = &color[0]; 292: colorptr = &color[2]; 293: colen = 5; 294: } 295: 296: /* do first move 297: * (special case) */ 298: if (! (rflag && raflag)) { 299: if (cturn == pnum) /* computer's move */ 300: move (0); 301: else { /* player's move */ 302: mvlim = movallow(); 303: /* reprint roll */ 304: if (tflag) 305: curmove (cturn == -1? 18: 19,0); 306: proll(); 307: getmove(); /* get player's move */ 308: } 309: } 310: if (tflag) { 311: curmove (17,0); 312: cline(); 313: begscr = 18; 314: } 315: 316: /* no longer any diff- 317: * erence between normal 318: * game and recovered 319: * game. */ 320: rflag = 0; 321: 322: /* move as long as it's 323: * someone's turn */ 324: while (cturn == 1 || cturn == -1) { 325: 326: /* board maintainence */ 327: if (tflag) 328: refresh(); /* fix board */ 329: else 330: /* redo board if -p */ 331: if (cturn == bflag || bflag == 0) 332: wrboard(); 333: 334: /* do computer's move */ 335: if (cturn == pnum) { 336: move (1); 337: 338: /* see if double 339: * refused */ 340: if (cturn == -2 || cturn == 2) 341: break; 342: 343: /* check for winning 344: * move */ 345: if (*offopp == 15) { 346: cturn *= -2; 347: break; 348: } 349: continue; 350: 351: } 352: 353: /* (player's move) */ 354: 355: /* clean screen if 356: * safe */ 357: if (tflag && hflag) { 358: curmove (20,0); 359: clend (); 360: hflag = 1; 361: } 362: 363: /* if allowed, give him 364: * a chance to double */ 365: if (dlast != cturn && gvalue < 64) { 366: if (tflag) 367: curmove (cturn == -1? 18: 19,0); 368: writel (*Colorptr); 369: c = readc(); 370: 371: /* character cases */ 372: switch (c) { 373: 374: /* reprint board */ 375: case 'R': 376: wrboard(); 377: break; 378: 379: /* save game */ 380: case 'S': 381: raflag = 1; 382: save (1); 383: break; 384: 385: /* quit */ 386: case 'Q': 387: quit(); 388: break; 389: 390: /* double */ 391: case 'D': 392: dble(); 393: break; 394: 395: /* roll */ 396: case ' ': 397: case '\n': 398: roll(); 399: writel (" rolls "); 400: writec (D0+'0'); 401: writec (' '); 402: writec (D1+'0'); 403: writel (". "); 404: 405: /* see if he can move */ 406: if ( (mvlim = movallow()) == 0) { 407: 408: /* can't move */ 409: writel (toobad1); 410: writel (*colorptr); 411: writel (unable); 412: if (tflag) { 413: if (pnum) { 414: buflush(); 415: sleep (MVPAUSE); 416: } 417: } 418: nexturn(); 419: break; 420: } 421: 422: /* get move */ 423: getmove(); 424: 425: /* okay to clean 426: * screen */ 427: hflag = 1; 428: break; 429: 430: /* invalid character */ 431: default: 432: 433: /* print help message */ 434: if (tflag) 435: curmove (20,0); 436: else 437: writec ('\n'); 438: text (helpm); 439: if (tflag) 440: curmove (cturn == -1? 18: 19,0); 441: else 442: writec ('\n'); 443: 444: /* don't erase */ 445: hflag = 0; 446: } 447: } else { /* couldn't double */ 448: 449: /* print roll */ 450: roll(); 451: if (tflag) 452: curmove (cturn == -1? 18: 19,0); 453: proll (); 454: 455: /* can he move? */ 456: if ((mvlim = movallow()) == 0) { 457: 458: /* he can't */ 459: writel (toobad2); 460: writel (*colorptr); 461: writel (cantmv); 462: buflush(); 463: sleep (MVPAUSE); 464: nexturn(); 465: continue; 466: } 467: 468: /* get move */ 469: getmove(); 470: } 471: } 472: 473: /* don't worry about who 474: * won if quit */ 475: if (cturn == 0) 476: break; 477: 478: /* fix cturn = winner */ 479: cturn /= -2; 480: 481: /* final board pos. */ 482: if (tflag) 483: refresh(); 484: 485: /* backgammon? */ 486: mflag = 0; 487: l = bar+7*cturn; 488: for (i = bar; i != l; i += cturn) 489: if (board[i]*cturn) mflag++; 490: 491: /* compute game value */ 492: if (tflag) 493: curmove (20,0); 494: if (*offopp == 15) { 495: if (mflag) { 496: writel (bgammon); 497: gvalue *= 3; 498: } 499: else if (*offptr <= 0) { 500: writel (gammon); 501: gvalue *= 2; 502: } 503: } 504: 505: /* report situation */ 506: if (cturn == -1) { 507: writel ("Red wins "); 508: rscore += gvalue; 509: } else { 510: writel ("White wins "); 511: wscore += gvalue; 512: } 513: wrint (gvalue); 514: writel (" point"); 515: if (gvalue > 1) 516: writec ('s'); 517: writel (".\n"); 518: 519: /* write score */ 520: wrscore(); 521: 522: /* check user count */ 523: # ifdef CORY 524: if (ucount() > MAXUSERS) { 525: writel (user2a); 526: wrint (MAXUSERS); 527: writel (user2b); 528: rfl = 1; 529: break; 530: } 531: # endif 532: 533: /* see if he wants 534: * another game */ 535: writel (again); 536: if ((i = yorn ('S')) == 0) 537: break; 538: 539: init(); 540: if (i == 2) { 541: writel (" Save.\n"); 542: cturn = 0; 543: save (0); 544: } 545: 546: /* yes, reset game */ 547: wrboard(); 548: } 549: 550: /* give him a chance to save if game was recovered */ 551: if (rfl && cturn) { 552: writel (svpromt); 553: if (yorn (0)) { 554: /* re-initialize for 555: * recovery */ 556: init(); 557: cturn = 0; 558: save(0); 559: } 560: } 561: 562: /* leave peacefully */ 563: getout (); 564: }
Defined functions
Defined variables
Defined macros
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Last modified: 1987-08-26
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