1 /* $NetBSD: one.c,v 1.5 2003/08/07 09:36:57 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)one.c 8.1 (Berkeley) 5/31/93"; 36 #else 37 __RCSID("$NetBSD: one.c,v 1.5 2003/08/07 09:36:57 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "back.h" 42 43 int 44 makmove(i) 45 int i; 46 { 47 int n, d; 48 int max; 49 50 d = d0; 51 n = abs(g[i] - p[i]); 52 max = (*offptr < 0 ? 7 : last()); 53 if (board[p[i]] * cturn <= 0) 54 return (checkd(d) + 2); 55 if (g[i] != home && board[g[i]] * cturn < -1) 56 return (checkd(d) + 3); 57 if (i || D0 == D1) { 58 if (n == max ? D1 < n : D1 != n) 59 return (checkd(d) + 1); 60 } else { 61 if (n == max ? D0 < n && D1 < n : D0 != n && D1 != n) 62 return (checkd(d) + 1); 63 if (n == max ? D0 < n : D0 != n) { 64 if (d0) 65 return (checkd(d) + 1); 66 swap; 67 } 68 } 69 if (g[i] == home && *offptr < 0) 70 return (checkd(d) + 4); 71 h[i] = 0; 72 board[p[i]] -= cturn; 73 if (g[i] != home) { 74 if (board[g[i]] == -cturn) { 75 board[home] -= cturn; 76 board[g[i]] = 0; 77 h[i] = 1; 78 if (abs(bar - g[i]) < 7) { 79 (*inopp)--; 80 if (*offopp >= 0) 81 *offopp -= 15; 82 } 83 } 84 board[g[i]] += cturn; 85 if (abs(home - g[i]) < 7 && abs(home - p[i]) > 6) { 86 (*inptr)++; 87 if (*inptr + *offptr == 0) 88 *offptr += 15; 89 } 90 } else { 91 (*offptr)++; 92 (*inptr)--; 93 } 94 return (0); 95 } 96 97 void 98 moverr(i) 99 int i; 100 { 101 int j; 102 103 if (tflag) 104 curmove(20, 0); 105 else 106 writec('\n'); 107 writel("Error: "); 108 for (j = 0; j <= i; j++) { 109 wrint(p[j]); 110 writec('-'); 111 wrint(g[j]); 112 if (j < i) 113 writec(','); 114 } 115 writel("... "); 116 movback(i); 117 } 118 119 120 int 121 checkd(d) 122 int d; 123 { 124 if (d0 != d) 125 swap; 126 return (0); 127 } 128 129 int 130 last() 131 { 132 int i; 133 134 for (i = home - 6 * cturn; i != home; i += cturn) 135 if (board[i] * cturn > 0) 136 return (abs(home - i)); 137 return (-1); 138 } 139 140 void 141 movback(i) 142 int i; 143 { 144 int j; 145 146 for (j = i - 1; j >= 0; j--) 147 backone(j); 148 } 149 150 void 151 backone(i) 152 int i; 153 { 154 board[p[i]] += cturn; 155 if (g[i] != home) { 156 board[g[i]] -= cturn; 157 if (abs(g[i] - home) < 7 && abs(p[i] - home) > 6) { 158 (*inptr)--; 159 if (*inptr + *offptr < 15 && *offptr >= 0) 160 *offptr -= 15; 161 } 162 } else { 163 (*offptr)--; 164 (*inptr)++; 165 } 166 if (h[i]) { 167 board[home] += cturn; 168 board[g[i]] = -cturn; 169 if (abs(bar - g[i]) < 7) { 170 (*inopp)++; 171 if (*inopp + *offopp == 0) 172 *offopp += 15; 173 } 174 } 175 } 176