1 /* @(#)dumpgame.c 8.1 (Berkeley) 5/31/93 */
2 /* $NetBSD: dumpgame.c,v 1.15 2009/08/12 08:54:54 dholland Exp $ */
5 * Copyright (c) 1980, 1993
6 * The Regents of the University of California. All rights reserved.
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39 /*** THIS CONSTANT MUST CHANGE AS THE DATA SPACES CHANGE ***/
47 static int readdump(int);
50 static struct dump Dump_template[] = {
51 { (char *)&Ship, sizeof (Ship) },
52 { (char *)&Now, sizeof (Now) },
53 { (char *)&Param, sizeof (Param) },
54 { (char *)&Etc, sizeof (Etc) },
55 { (char *)&Game, sizeof (Game) },
56 { (char *)Sect, sizeof (Sect) },
57 { (char *)Quad, sizeof (Quad) },
58 { (char *)&Move, sizeof (Move) },
59 { (char *)Event, sizeof (Event) },
66 ** This routine dumps the game onto the file "trek.dump". The
67 ** first two bytes of the file are a version number, which
68 ** reflects whether this image may be used. Obviously, it must
69 ** change as the size, content, or order of the data structures
75 dumpgame(int v __unused)
82 if ((fd = creat("trek.dump", 0644)) < 0) {
83 warn("cannot open `trek.dump'");
87 write(fd, &version, sizeof version);
89 /* output the main data areas */
90 for (d = Dump_template; d->area; d++) {
91 write(fd, &d->area, sizeof d->area);
93 write(fd, d->area, i);
103 ** The game is restored from the file "trek.dump". In order for
104 ** this to succeed, the file must exist and be readable, must
105 ** have the correct version number, and must have all the appro-
106 ** priate data areas.
108 ** Return value is zero for success, one for failure.
117 if ((fd = open("trek.dump", O_RDONLY)) < 0 ||
118 read(fd, &version, sizeof version) != sizeof version ||
119 version != VERSION ||
121 printf("cannot restart\n");
135 ** This is the business end of restartgame(). It reads in the
138 ** Returns zero for success, one for failure.
151 for (d = Dump_template; d->area; d++) {
152 if (read(fd, &junk, sizeof junk) != (sizeof junk))
154 if ((char *)junk != d->area)
157 if (read(fd, d->area, i) != i)
161 /* make quite certain we are at EOF */
162 return (read(fd, &junk, 1));