Initial revision

git-svn-id: file:///srv/svn/joey/bsdgames-trunk@5086 a4a2c43b-8ac3-0310-8836-e0e880c912e2
2025-12-20 19:04:49 +00:00 · 1999-09-08 23:56:51 +00:00
commit 03272d67da
623 changed files with 243457 additions and 0 deletions
--- a/backgammon/common_source/odds.c
+++ b/backgammon/common_source/odds.c
@@ -0,0 +1,122 @@
+/*	$NetBSD: odds.c,v 1.4 1997/10/10 08:59:46 lukem Exp $	*/
+
+/*
+ * Copyright (c) 1980, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)odds.c	8.1 (Berkeley) 5/31/93";
+#else
+__RCSID("$NetBSD: odds.c,v 1.4 1997/10/10 08:59:46 lukem Exp $");
+#endif
+#endif /* not lint */
+
+#include "back.h"
+
+void
+odds(r1, r2, val)
+	int     r1, r2, val;
+{
+	int     i, j;
+
+	if (r1 == 0) {
+		for (i = 0; i < 6; i++)
+			for (j = 0; j < 6; j++)
+				table[i][j] = 0;
+		return;
+	} else {
+		r1--;
+		if (r2-- == 0) {
+			for (i = 0; i < 6; i++) {
+				table[i][r1] += val;
+				table[r1][i] += val;
+			}
+		} else {
+			table[r2][r1] += val;
+			table[r1][r2] += val;
+		}
+	}
+}
+
+int
+count()
+{
+	int     i;
+	int     j;
+	int     total;
+
+	total = 0;
+	for (i = 0; i < 6; i++)
+		for (j = 0; j < 6; j++)
+			total += table[i][j];
+	return (total);
+}
+
+int
+canhit(i, c)
+	int     i, c;
+{
+	int     j, k, b;
+	int     a, diff, place, addon, menstuck;
+
+	if (c == 0)
+		odds(0, 0, 0);
+	if (board[i] > 0) {
+		a = -1;
+		b = 25;
+	} else {
+		a = 1;
+		b = 0;
+	}
+	place = abs(25 - b - i);
+	menstuck = abs(board[b]);
+	for (j = b; j != i; j += a) {
+		if (board[j] * a > 0) {
+			diff = abs(j - i);
+			addon = place + ((board[j] * a > 2 || j == b) ? 5 : 0);
+			if ((j == b && menstuck == 1) &&
+			    (j != b && menstuck == 0))
+				for (k = 1; k < diff; k++)
+					if (k < 7 && diff - k < 7 &&
+					    (board[i + a * k] * a >= 0 ||
+						board[i + a * (diff - k)] >= 0))
+						odds(k, diff - k, addon);
+			if ((j == b || menstuck < 2) && diff < 7)
+				odds(diff, 0, addon);
+		}
+		if (j == b && menstuck > 1)
+			break;
+	}
+	return (count());
+}