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 1.3 2006/08/08 16:36:11 pavalos Exp $ 36 */ 37 38 #include "back.h" 39 40 void 41 getmove(void) 42 { 43 int i, c; 44 45 c = 0; 46 for (;;) { 47 i = checkmove(c); 48 49 switch (i) { 50 case -1: 51 if (movokay(mvlim)) { 52 if (tflag) 53 curmove (20,0); 54 else 55 writec ('\n'); 56 for (i = 0; i < mvlim; i++) 57 if (h[i]) 58 wrhit(g[i]); 59 nexturn(); 60 if (*offopp == 15) 61 cturn *= -2; 62 if (tflag && pnum) 63 bflag = pnum; 64 return; 65 } 66 67 case -4: 68 case 0: 69 if (tflag) 70 refresh(); 71 if (i != 0 && i != -4) 72 break; 73 if (tflag) 74 curmove (20,0); 75 else 76 writec ('\n'); 77 writel (*Colorptr); 78 if (i == -4) 79 writel (" must make "); 80 else 81 writel (" can only make "); 82 writec (mvlim+'0'); 83 writel (" move"); 84 if (mvlim > 1) 85 writec ('s'); 86 writec ('.'); 87 writec ('\n'); 88 break; 89 90 case -3: 91 if (quit()) 92 return; 93 } 94 95 if (! tflag) 96 proll (); 97 else { 98 curmove (cturn == -1? 18: 19,39); 99 cline (); 100 c = -1; 101 } 102 } 103 } 104 105 int 106 movokay(int mv) 107 { 108 int i, m; 109 110 if (d0) 111 swap; 112 113 for (i = 0; i < mv; i++) { 114 115 if (p[i] == g[i]) { 116 moverr (i); 117 curmove (20,0); 118 writel ("Attempt to move to same location.\n"); 119 return (0); 120 } 121 122 if (cturn*(g[i]-p[i]) < 0) { 123 moverr (i); 124 curmove (20,0); 125 writel ("Backwards move.\n"); 126 return (0); 127 } 128 129 if (abs(board[bar]) && p[i] != bar) { 130 moverr (i); 131 curmove (20,0); 132 writel ("Men still on bar.\n"); 133 return (0); 134 } 135 136 if ( (m = makmove(i)) ) { 137 moverr (i); 138 switch (m) { 139 140 case 1: 141 writel ("Move not rolled.\n"); 142 break; 143 144 case 2: 145 writel ("Bad starting position.\n"); 146 break; 147 148 case 3: 149 writel ("Destination occupied.\n"); 150 break; 151 152 case 4: 153 writel ("Can't remove men yet.\n"); 154 } 155 return (0); 156 } 157 } 158 return (1); 159 } 160