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 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)one.c 8.1 (Berkeley) 5/31/93"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD: src/games/backgammon/common_source/one.c,v 1.5 1999/11/30 03:48:27 billf Exp $"; 40 #endif /* not lint */ 41 42 #include "back.h" 43 44 makmove (i) 45 int i; 46 47 { 48 int n, d; 49 int max; 50 51 d = d0; 52 n = abs(g[i]-p[i]); 53 max = (*offptr < 0? 7: last()); 54 if (board[p[i]]*cturn <= 0) 55 return (checkd(d)+2); 56 if (g[i] != home && board[g[i]]*cturn < -1) 57 return (checkd(d)+3); 58 if (i || D0 == D1) { 59 if (n == max? D1 < n: D1 != n) 60 return (checkd(d)+1); 61 } else { 62 if (n == max? D0 < n && D1 < n: D0 != n && D1 != n) 63 return (checkd(d)+1); 64 if (n == max? D0 < n: D0 != n) { 65 if (d0) 66 return (checkd(d)+1); 67 swap; 68 } 69 } 70 if (g[i] == home && *offptr < 0) 71 return (checkd(d)+4); 72 h[i] = 0; 73 board[p[i]] -= cturn; 74 if (g[i] != home) { 75 if (board[g[i]] == -cturn) { 76 board[home] -= cturn; 77 board[g[i]] = 0; 78 h[i] = 1; 79 if (abs(bar-g[i]) < 7) { 80 (*inopp)--; 81 if (*offopp >= 0) 82 *offopp -= 15; 83 } 84 } 85 board[g[i]] += cturn; 86 if (abs(home-g[i]) < 7 && abs(home-p[i]) > 6) { 87 (*inptr)++; 88 if (*inptr+*offptr == 0) 89 *offptr += 15; 90 } 91 } else { 92 (*offptr)++; 93 (*inptr)--; 94 } 95 return (0); 96 } 97 98 moverr (i) 99 int i; 100 101 { 102 int j; 103 104 if (tflag) 105 curmove (20,0); 106 else 107 writec ('\n'); 108 writel ("Error: "); 109 for (j = 0; j <= i; j++) { 110 wrint (p[j]); 111 writec ('-'); 112 wrint (g[j]); 113 if (j < i) 114 writec (','); 115 } 116 writel ("... "); 117 movback (i); 118 } 119 120 121 checkd (d) 122 int d; 123 124 { 125 if (d0 != d) 126 swap; 127 return (0); 128 } 129 130 last () { 131 int i; 132 133 for (i = home-6*cturn; i != home; i += cturn) 134 if (board[i]*cturn > 0) 135 return (abs(home-i)); 136 } 137 138 movback (i) 139 int i; 140 141 { 142 int j; 143 144 for (j = i-1; j >= 0; j--) 145 backone(j); 146 } 147 148 backone (i) 149 int i; 150 151 { 152 board[p[i]] += cturn; 153 if (g[i] != home) { 154 board[g[i]] -= cturn; 155 if (abs(g[i]-home) < 7 && abs(p[i]-home) > 6) { 156 (*inptr)--; 157 if (*inptr+*offptr < 15 && *offptr >= 0) 158 *offptr -= 15; 159 } 160 } else { 161 (*offptr)--; 162 (*inptr)++; 163 } 164 if (h[i]) { 165 board[home] += cturn; 166 board[g[i]] = -cturn; 167 if (abs(bar-g[i]) < 7) { 168 (*inopp)++; 169 if (*inopp+*offopp == 0) 170 *offopp += 15; 171 } 172 } 173 } 174