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33 * @(#)dumpgame.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/trek/dumpgame.c,v 1.6 1999/11/30 03:49:46 billf Exp $
35 * $DragonFly: src/games/trek/dumpgame.c,v 1.2 2003/06/17 04:25:25 dillon Exp $
42 /*** THIS CONSTANT MUST CHANGE AS THE DATA SPACES CHANGE ***/
52 struct dump Dump_template[] =
54 (char *)&Ship, sizeof (Ship),
55 (char *)&Now, sizeof (Now),
56 (char *)&Param, sizeof (Param),
57 (char *)&Etc, sizeof (Etc),
58 (char *)&Game, sizeof (Game),
59 (char *)Sect, sizeof (Sect),
60 (char *)Quad, sizeof (Quad),
61 (char *)&Move, sizeof (Move),
62 (char *)Event, sizeof (Event),
69 ** This routine dumps the game onto the file "trek.dump". The
70 ** first two bytes of the file are a version number, which
71 ** reflects whether this image may be used. Obviously, it must
72 ** change as the size, content, or order of the data structures
83 if ((fd = creat("trek.dump", 0644)) < 0)
84 return (printf("cannot dump\n"));
86 write(fd, &version, sizeof version);
88 /* output the main data areas */
89 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.
116 if ((fd = open("trek.dump", O_RDONLY)) < 0 ||
117 read(fd, &version, sizeof version) != sizeof version ||
118 version != VERSION ||
121 printf("cannot restart\n");
134 ** This is the business end of restartgame(). It reads in the
137 ** Returns zero for success, one for failure.
150 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));