initial import of 386bsd-0.1 sources

1 files changed, 161 insertions, 0 deletions

diff --git a/trek/dumpgame.c b/trek/dumpgame.c
new file mode 100644
index 00000000..51842072
--- /dev/null
+++ b/trek/dumpgame.c
@@ -0,0 +1,161 @@
+/*
+ * 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[] = "@(#)dumpgame.c	4.6 (Berkeley) 6/1/90";
+#endif /* not lint */
+
+# include	"trek.h"
+
+/***  THIS CONSTANT MUST CHANGE AS THE DATA SPACES CHANGE ***/
+# define	VERSION		2
+
+struct dump
+{
+	char	*area;
+	int	count;
+};
+
+
+struct dump	Dump_template[] =
+{
+	(char *)&Ship,		sizeof (Ship),
+	(char *)&Now,		sizeof (Now),
+	(char *)&Param,		sizeof (Param),
+	(char *)&Etc,		sizeof (Etc),
+	(char *)&Game,		sizeof (Game),
+	(char *)Sect,		sizeof (Sect),
+	(char *)Quad,		sizeof (Quad),
+	(char *)&Move,		sizeof (Move),
+	(char *)Event,		sizeof (Event),
+	0
+};
+
+/*
+**  DUMP GAME
+**
+**	This routine dumps the game onto the file "trek.dump".  The
+**	first two bytes of the file are a version number, which
+**	reflects whether this image may be used.  Obviously, it must
+**	change as the size, content, or order of the data structures
+**	output change.
+*/
+
+dumpgame()
+{
+	int			version;
+	register int		fd;
+	register struct dump	*d;
+	register int		i;
+
+	if ((fd = creat("trek.dump", 0644)) < 0)
+		return (printf("cannot dump\n"));
+	version = VERSION;
+	write(fd, &version, sizeof version);
+
+	/* output the main data areas */
+	for (d = Dump_template; d->area; d++)
+	{
+		write(fd, &d->area, sizeof d->area);
+		i = d->count;
+		write(fd, d->area, i);
+	}
+
+	close(fd);
+}
+
+
+/*
+**  RESTORE GAME
+**
+**	The game is restored from the file "trek.dump".  In order for
+**	this to succeed, the file must exist and be readable, must
+**	have the correct version number, and must have all the appro-
+**	priate data areas.
+**
+**	Return value is zero for success, one for failure.
+*/
+
+restartgame()
+{
+	register int	fd;
+	int		version;
+
+	if ((fd = open("trek.dump", 0)) < 0 ||
+	    read(fd, &version, sizeof version) != sizeof version ||
+	    version != VERSION ||
+	    readdump(fd))
+	{
+		printf("cannot restart\n");
+		close(fd);
+		return (1);
+	}
+
+	close(fd);
+	return (0);
+}
+
+
+/*
+**  READ DUMP
+**
+**	This is the business end of restartgame().  It reads in the
+**	areas.
+**
+**	Returns zero for success, one for failure.
+*/
+
+readdump(fd1)
+int	fd1;
+{
+	register int		fd;
+	register struct dump	*d;
+	register int		i;
+	int			junk;
+
+	fd = fd1;
+
+	for (d = Dump_template; d->area; d++)
+	{
+		if (read(fd, &junk, sizeof junk) != (sizeof junk))
+			return (1);
+		if ((char *)junk != d->area)
+			return (1);
+		i = d->count;
+		if (read(fd, d->area, i) != i)
+			return (1);
+	}
+
+	/* make quite certain we are at EOF */
+	return (read(fd, &junk, 1));
+}