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Initial revision
git-svn-id: file:///srv/svn/joey/bsdgames-trunk@5086 a4a2c43b-8ac3-0310-8836-e0e880c912e2
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joey
192
adventure/save.c
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192
adventure/save.c
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/* $NetBSD: save.c,v 1.5 1998/09/13 00:07:24 hubertf 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 1.5 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>
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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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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,
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* second */
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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;
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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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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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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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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;
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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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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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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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