From 77e3814f0c0e3dea4d0032e25666f77e6f83bfff Mon Sep 17 00:00:00 2001
From: cgd <cgd@NetBSD.org>
Date: Sun, 21 Mar 1993 09:45:37 +0000
Subject: initial import of 386bsd-0.1 sources

---
 backgammon/common_source/check.c | 158 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 backgammon/common_source/check.c

(limited to 'backgammon/common_source/check.c')

diff --git a/backgammon/common_source/check.c b/backgammon/common_source/check.c
new file mode 100644
index 00000000..5ef2eb2b
--- /dev/null
+++ b/backgammon/common_source/check.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 1980 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)check.c	5.4 (Berkeley) 6/1/90";
+#endif /* not lint */
+
+#include "back.h"
+
+getmove ()  {
+	register int	i, c;
+
+	c = 0;
+	for (;;)  {
+		i = checkmove(c);
+
+		switch (i)  {
+		case -1:
+			if (movokay(mvlim))  {
+				if (tflag)
+					curmove (20,0);
+				else
+					writec ('\n');
+				for (i = 0; i < mvlim; i++)
+					if (h[i])
+						wrhit(g[i]);
+				nexturn();
+				if (*offopp == 15)
+					cturn *= -2;
+				if (tflag && pnum)
+					bflag = pnum;
+				return;
+			}
+
+		case -4:
+		case 0:
+			if (tflag)
+				refresh();
+			if (i != 0 && i != -4)
+				break;
+			if (tflag)
+				curmove (20,0);
+			else
+				writec ('\n');
+			writel (*Colorptr);
+			if (i == -4)
+				writel (" must make ");
+			else
+				writel (" can only make ");
+			writec (mvlim+'0');
+			writel (" move");
+			if (mvlim > 1)
+				writec ('s');
+			writec ('.');
+			writec ('\n');
+			break;
+
+		case -3:
+			if (quit())
+				return;
+		}
+
+		if (! tflag)
+			proll ();
+		else  {
+			curmove (cturn == -1? 18: 19,39);
+			cline ();
+			c = -1;
+		}
+	}
+}
+
+movokay (mv)
+register int	mv;
+
+{
+	register int	i, m;
+
+	if (d0)
+		swap;
+
+	for (i = 0; i < mv; i++)  {
+
+		if (p[i] == g[i])  {
+			moverr (i);
+			curmove (20,0);
+			writel ("Attempt to move to same location.\n");
+			return (0);
+		}
+
+		if (cturn*(g[i]-p[i]) < 0)  {
+			moverr (i);
+			curmove (20,0);
+			writel ("Backwards move.\n");
+			return (0);
+		}
+
+		if (abs(board[bar]) && p[i] != bar)  {
+			moverr (i);
+			curmove (20,0);
+			writel ("Men still on bar.\n");
+			return (0);
+		}
+
+		if ( (m = makmove(i)) )  {
+			moverr (i);
+			switch (m)  {
+
+			case 1:
+				writel ("Move not rolled.\n");
+				break;
+
+			case 2:
+				writel ("Bad starting position.\n");
+				break;
+
+			case 3:
+				writel ("Destination occupied.\n");
+				break;
+
+			case 4:
+				writel ("Can't remove men yet.\n");
+			}
+			return (0);
+		}
+	}
+	return (1);
+}
-- 
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