NetBSD/games/adventure/save.c

193 lines
5.7 KiB
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/* $NetBSD: save.c,v 1.5 1998/09/13 00:07:24 hubertf Exp $ */
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/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* The game adventure was originally written in Fortran by Will Crowther
* and Don Woods. It was later translated to C and enhanced by Jim
* Gillogly. This code is derived from software contributed to Berkeley
* by Jim Gillogly at The Rand Corporation.
*
* 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.
*/
#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)save.c 8.1 (Berkeley) 5/31/93";
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#else
__RCSID("$NetBSD: save.c,v 1.5 1998/09/13 00:07:24 hubertf Exp $");
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#endif
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#endif /* not lint */
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#include <stdio.h>
#include <stdlib.h>
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#include "hdr.h"
#include "extern.h"
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struct savestruct {
void *address;
int width;
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};
struct savestruct save_array[] =
{
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{&abbnum, sizeof(abbnum)},
{&attack, sizeof(attack)},
{&blklin, sizeof(blklin)},
{&bonus, sizeof(bonus)},
{&chloc, sizeof(chloc)},
{&chloc2, sizeof(chloc2)},
{&clock1, sizeof(clock1)},
{&clock2, sizeof(clock2)},
{&closed, sizeof(closed)},
{&closng, sizeof(closng)},
{&daltlc, sizeof(daltlc)},
{&demo, sizeof(demo)},
{&detail, sizeof(detail)},
{&dflag, sizeof(dflag)},
{&dkill, sizeof(dkill)},
{&dtotal, sizeof(dtotal)},
{&foobar, sizeof(foobar)},
{&gaveup, sizeof(gaveup)},
{&holdng, sizeof(holdng)},
{&iwest, sizeof(iwest)},
{&k, sizeof(k)},
{&k2, sizeof(k2)},
{&knfloc, sizeof(knfloc)},
{&kq, sizeof(kq)},
{&latncy, sizeof(latncy)},
{&limit, sizeof(limit)},
{&lmwarn, sizeof(lmwarn)},
{&loc, sizeof(loc)},
{&maxdie, sizeof(maxdie)},
{&mxscor, sizeof(mxscor)},
{&newloc, sizeof(newloc)},
{&numdie, sizeof(numdie)},
{&obj, sizeof(obj)},
{&oldlc2, sizeof(oldlc2)},
{&oldloc, sizeof(oldloc)},
{&panic, sizeof(panic)},
{&saved, sizeof(saved)},
{&savet, sizeof(savet)},
{&scorng, sizeof(scorng)},
{&spk, sizeof(spk)},
{&stick, sizeof(stick)},
{&tally, sizeof(tally)},
{&tally2, sizeof(tally2)},
{&tkk, sizeof(tkk)},
{&turns, sizeof(turns)},
{&verb, sizeof(verb)},
{&wd1, sizeof(wd1)},
{&wd2, sizeof(wd2)},
{&wzdark, sizeof(wzdark)},
{&yea, sizeof(yea)},
{atloc, sizeof(atloc)},
{dloc, sizeof(dloc)},
{dseen, sizeof(dseen)},
{fixed, sizeof(fixed)},
{hinted, sizeof(hinted)},
{links, sizeof(links)},
{odloc, sizeof(odloc)},
{place, sizeof(place)},
{prop, sizeof(prop)},
{tk, sizeof(tk)},
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{NULL, 0}
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};
int
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save(outfile) /* Two passes on data: first to get checksum,
* second */
const char *outfile; /* to output the data using checksum to start
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* random #s */
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{
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FILE *out;
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struct savestruct *p;
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char *s;
long sum;
int i;
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crc_start();
for (p = save_array; p->address != NULL; p++)
sum = crc(p->address, p->width);
srandom((int) sum);
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if ((out = fopen(outfile, "wb")) == NULL) {
fprintf(stderr,
"Hmm. The name \"%s\" appears to be magically blocked.\n",
outfile);
return 1;
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}
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fwrite(&sum, sizeof(sum), 1, out); /* Here's the random() key */
for (p = save_array; p->address != NULL; p++) {
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for (s = p->address, i = 0; i < p->width; i++, s++)
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*s = (*s ^ random()) & 0xFF; /* Lightly encrypt */
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fwrite(p->address, p->width, 1, out);
}
fclose(out);
return 0;
}
int
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restore(infile)
const char *infile;
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{
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FILE *in;
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struct savestruct *p;
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char *s;
long sum, cksum = 0;
int i;
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if ((in = fopen(infile, "rb")) == NULL) {
fprintf(stderr,
"Hmm. The file \"%s\" appears to be magically blocked.\n",
infile);
return 1;
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}
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fread(&sum, sizeof(sum), 1, in); /* Get the seed */
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srandom((int) sum);
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for (p = save_array; p->address != NULL; p++) {
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fread(p->address, p->width, 1, in);
for (s = p->address, i = 0; i < p->width; i++, s++)
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*s = (*s ^ random()) & 0xFF; /* Lightly decrypt */
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}
fclose(in);
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crc_start(); /* See if she cheated */
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for (p = save_array; p->address != NULL; p++)
cksum = crc(p->address, p->width);
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if (sum != cksum) /* Tsk tsk */
return 2; /* Altered the file */
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/* We successfully restored, so this really was a save file */
/* Get rid of the file, but don't bother checking that we did */
return 0;
}