196 lines
6.3 KiB
C
196 lines
6.3 KiB
C
/* $NetBSD: save.c,v 1.3 1997/08/11 14:06:17 christos Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* The game adventure was originally written in Fortran by Will Crowther
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* and Don Woods. It was later translated to C and enhanced by Jim
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* Gillogly. This code is derived from software contributed to Berkeley
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* by Jim Gillogly at The Rand Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#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
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__RCSID("$NetBSD: save.c,v 1.3 1997/08/11 14:06:17 christos Exp $");
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#endif
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#endif /* not lint */
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#include <stdio.h>
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#include <stdlib.h>
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#include "hdr.h"
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#include "extern.h"
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struct savestruct
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{
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void *address;
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int width;
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};
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struct savestruct save_array[] =
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{
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{ &abbnum, sizeof(abbnum) },
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{ &attack, sizeof(attack) },
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{ &blklin, sizeof(blklin) },
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{ &bonus, sizeof(bonus) },
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{ &chloc, sizeof(chloc) },
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{ &chloc2, sizeof(chloc2) },
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{ &clock1, sizeof(clock1) },
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{ &clock2, sizeof(clock2) },
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{ &closed, sizeof(closed) },
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{ &closng, sizeof(closng) },
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{ &daltlc, sizeof(daltlc) },
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{ &demo, sizeof(demo) },
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{ &detail, sizeof(detail) },
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{ &dflag, sizeof(dflag) },
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{ &dkill, sizeof(dkill) },
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{ &dtotal, sizeof(dtotal) },
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{ &foobar, sizeof(foobar) },
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{ &gaveup, sizeof(gaveup) },
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{ &holdng, sizeof(holdng) },
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{ &iwest, sizeof(iwest) },
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{ &k, sizeof(k) },
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{ &k2, sizeof(k2) },
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{ &knfloc, sizeof(knfloc) },
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{ &kq, sizeof(kq) },
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{ &latncy, sizeof(latncy) },
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{ &limit, sizeof(limit) },
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{ &lmwarn, sizeof(lmwarn) },
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{ &loc, sizeof(loc) },
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{ &maxdie, sizeof(maxdie) },
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{ &mxscor, sizeof(mxscor) },
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{ &newloc, sizeof(newloc) },
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{ &numdie, sizeof(numdie) },
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{ &obj, sizeof(obj) },
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{ &oldlc2, sizeof(oldlc2) },
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{ &oldloc, sizeof(oldloc) },
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{ &panic, sizeof(panic) },
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{ &saved, sizeof(saved) },
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{ &savet, sizeof(savet) },
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{ &scorng, sizeof(scorng) },
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{ &spk, sizeof(spk) },
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{ &stick, sizeof(stick) },
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{ &tally, sizeof(tally) },
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{ &tally2, sizeof(tally2) },
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{ &tkk, sizeof(tkk) },
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{ &turns, sizeof(turns) },
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{ &verb, sizeof(verb) },
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{ &wd1, sizeof(wd1) },
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{ &wd2, sizeof(wd2) },
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{ &wzdark, sizeof(wzdark) },
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{ &yea, sizeof(yea) },
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{ atloc, sizeof(atloc) },
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{ dloc, sizeof(dloc) },
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{ dseen, sizeof(dseen) },
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{ fixed, sizeof(fixed) },
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{ hinted, sizeof(hinted) },
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{ links, sizeof(links) },
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{ odloc, sizeof(odloc) },
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{ place, sizeof(place) },
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{ prop, sizeof(prop) },
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{ tk, sizeof(tk) },
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{ NULL, 0 }
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};
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int
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save(outfile) /* Two passes on data: first to get checksum, second */
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char *outfile; /* to output the data using checksum to start 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;
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long sum;
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int i;
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crc_start();
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for (p = save_array; p->address != NULL; p++)
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sum = crc(p->address, p->width);
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srandom((int) sum);
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if ((out = fopen(outfile, "wb")) == NULL)
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{
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fprintf(stderr,
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"Hmm. The name \"%s\" appears to be magically blocked.\n",
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outfile);
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return 1;
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}
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fwrite(&sum, sizeof(sum), 1, out); /* Here's the random() key */
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for (p = save_array; p->address != NULL; p++)
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{
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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);
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}
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fclose(out);
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return 0;
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}
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int
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restore(infile)
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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;
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long sum, cksum = 0;
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int i;
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if ((in = fopen(infile, "rb")) == NULL)
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{
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fprintf(stderr,
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"Hmm. The file \"%s\" appears to be magically blocked.\n",
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infile);
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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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{
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fread(p->address, p->width, 1, in);
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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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}
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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++)
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cksum = crc(p->address, p->width);
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if (sum != cksum) /* Tsk tsk */
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return 2; /* Altered the file */
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/* We successfully restored, so this really was a save file */
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/* Get rid of the file, but don't bother checking that we did */
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return 0;
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}
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