7689e1e466
compiler warnings go away, but the compiler is throwing away 32-bits as the long value is silently truncated to an int on alpha. But the program works, so that must not matter.
162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*
|
|
* Copyright (c) 1980, 1993
|
|
* The 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 8.1 (Berkeley) 5/31/93";
|
|
#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;
|
|
long 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));
|
|
}
|