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/allow.c
+++ b/backgammon/common_source/allow.c
@@ -0,0 +1,117 @@
+/*	$NetBSD: allow.c,v 1.4 1997/10/10 08:59:41 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[] = "@(#)allow.c	8.1 (Berkeley) 5/31/93";
+#else
+__RCSID("$NetBSD: allow.c,v 1.4 1997/10/10 08:59:41 lukem Exp $");
+#endif
+#endif /* not lint */
+
+#include "back.h"
+
+int
+movallow()
+{
+	int     i, m, iold;
+	int     r;
+
+	if (d0)
+		swap;
+	m = (D0 == D1 ? 4 : 2);
+	for (i = 0; i < 4; i++)
+		p[i] = bar;
+	i = iold = 0;
+	while (i < m) {
+		if (*offptr == 15)
+			break;
+		h[i] = 0;
+		if (board[bar]) {
+			if (i == 1 || m == 4)
+				g[i] = bar + cturn * D1;
+			else
+				g[i] = bar + cturn * D0;
+			if ((r = makmove(i)) != 0) {
+				if (d0 || m == 4)
+					break;
+				swap;
+				movback(i);
+				if (i > iold)
+					iold = i;
+				for (i = 0; i < 4; i++)
+					p[i] = bar;
+				i = 0;
+			} else
+				i++;
+			continue;
+		}
+		if ((p[i] += cturn) == home) {
+			if (i > iold)
+				iold = i;
+			if (m == 2 && i) {
+				movback(i);
+				p[i--] = bar;
+				if (p[i] != bar)
+					continue;
+				else
+					break;
+			}
+			if (d0 || m == 4)
+				break;
+			swap;
+			movback(i);
+			for (i = 0; i < 4; i++)
+				p[i] = bar;
+			i = 0;
+			continue;
+		}
+		if (i == 1 || m == 4)
+			g[i] = p[i] + cturn * D1;
+		else
+			g[i] = p[i] + cturn * D0;
+		if (g[i] * cturn > home) {
+			if (*offptr >= 0)
+				g[i] = home;
+			else
+				continue;
+		}
+		if (board[p[i]] * cturn > 0 && (r = makmove(i)) == 0)
+			i++;
+	}
+	movback(i);
+	return (iold > i ? iold : i);
+}