2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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36 static char sccsid[] = "@(#)dumpgame.c 8.1 (Berkeley) 5/31/93";
38 static const char rcsid[] =
39 "$FreeBSD: src/games/trek/dumpgame.c,v 1.6 1999/11/30 03:49:46 billf Exp $";
46 /*** THIS CONSTANT MUST CHANGE AS THE DATA SPACES CHANGE ***/
56 struct dump Dump_template[] =
58 (char *)&Ship, sizeof (Ship),
59 (char *)&Now, sizeof (Now),
60 (char *)&Param, sizeof (Param),
61 (char *)&Etc, sizeof (Etc),
62 (char *)&Game, sizeof (Game),
63 (char *)Sect, sizeof (Sect),
64 (char *)Quad, sizeof (Quad),
65 (char *)&Move, sizeof (Move),
66 (char *)Event, sizeof (Event),
73 ** This routine dumps the game onto the file "trek.dump". The
74 ** first two bytes of the file are a version number, which
75 ** reflects whether this image may be used. Obviously, it must
76 ** change as the size, content, or order of the data structures
87 if ((fd = creat("trek.dump", 0644)) < 0)
88 return (printf("cannot dump\n"));
90 write(fd, &version, sizeof version);
92 /* output the main data areas */
93 for (d = Dump_template; d->area; d++)
95 write(fd, &d->area, sizeof d->area);
97 write(fd, d->area, i);
107 ** The game is restored from the file "trek.dump". In order for
108 ** this to succeed, the file must exist and be readable, must
109 ** have the correct version number, and must have all the appro-
110 ** priate data areas.
112 ** Return value is zero for success, one for failure.
120 if ((fd = open("trek.dump", O_RDONLY)) < 0 ||
121 read(fd, &version, sizeof version) != sizeof version ||
122 version != VERSION ||
125 printf("cannot restart\n");
138 ** This is the business end of restartgame(). It reads in the
141 ** Returns zero for success, one for failure.
154 for (d = Dump_template; d->area; d++)
156 if (read(fd, &junk, sizeof junk) != (sizeof junk))
158 if ((char *)junk != d->area)
161 if (read(fd, d->area, i) != i)
165 /* make quite certain we are at EOF */
166 return (read(fd, &junk, 1));