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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)check.c 8.1 (Berkeley) 5/31/93 34 * $FreeBSD: src/games/backgammon/common_source/check.c,v 1.4 1999/11/30 03:48:25 billf Exp $ 35 * $DragonFly: src/games/backgammon/common_source/check.c,v 1.2 2003/06/17 04:25:22 dillon Exp $ 36 */ 37 38 #include "back.h" 39 40 getmove () { 41 int i, c; 42 43 c = 0; 44 for (;;) { 45 i = checkmove(c); 46 47 switch (i) { 48 case -1: 49 if (movokay(mvlim)) { 50 if (tflag) 51 curmove (20,0); 52 else 53 writec ('\n'); 54 for (i = 0; i < mvlim; i++) 55 if (h[i]) 56 wrhit(g[i]); 57 nexturn(); 58 if (*offopp == 15) 59 cturn *= -2; 60 if (tflag && pnum) 61 bflag = pnum; 62 return; 63 } 64 65 case -4: 66 case 0: 67 if (tflag) 68 refresh(); 69 if (i != 0 && i != -4) 70 break; 71 if (tflag) 72 curmove (20,0); 73 else 74 writec ('\n'); 75 writel (*Colorptr); 76 if (i == -4) 77 writel (" must make "); 78 else 79 writel (" can only make "); 80 writec (mvlim+'0'); 81 writel (" move"); 82 if (mvlim > 1) 83 writec ('s'); 84 writec ('.'); 85 writec ('\n'); 86 break; 87 88 case -3: 89 if (quit()) 90 return; 91 } 92 93 if (! tflag) 94 proll (); 95 else { 96 curmove (cturn == -1? 18: 19,39); 97 cline (); 98 c = -1; 99 } 100 } 101 } 102 103 movokay (mv) 104 int mv; 105 106 { 107 int i, m; 108 109 if (d0) 110 swap; 111 112 for (i = 0; i < mv; i++) { 113 114 if (p[i] == g[i]) { 115 moverr (i); 116 curmove (20,0); 117 writel ("Attempt to move to same location.\n"); 118 return (0); 119 } 120 121 if (cturn*(g[i]-p[i]) < 0) { 122 moverr (i); 123 curmove (20,0); 124 writel ("Backwards move.\n"); 125 return (0); 126 } 127 128 if (abs(board[bar]) && p[i] != bar) { 129 moverr (i); 130 curmove (20,0); 131 writel ("Men still on bar.\n"); 132 return (0); 133 } 134 135 if ( (m = makmove(i)) ) { 136 moverr (i); 137 switch (m) { 138 139 case 1: 140 writel ("Move not rolled.\n"); 141 break; 142 143 case 2: 144 writel ("Bad starting position.\n"); 145 break; 146 147 case 3: 148 writel ("Destination occupied.\n"); 149 break; 150 151 case 4: 152 writel ("Can't remove men yet.\n"); 153 } 154 return (0); 155 } 156 } 157 return (1); 158 } 159