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Diffstat (limited to 'adventure/save.c')
| -rw-r--r-- | adventure/save.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/adventure/save.c b/adventure/save.c new file mode 100644 index 00000000..8dea684b --- /dev/null +++ b/adventure/save.c @@ -0,0 +1,184 @@ +/*- + * 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)save.c 8.1 (Berkeley) 5/31/93"; +#endif /* not lint */ + +#include <stdio.h> +#include "hdr.h" + +struct savestruct +{ + void *address; + int width; +}; + +struct savestruct save_array[] = +{ + &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), + link, sizeof(link), + odloc, sizeof(odloc), + place, sizeof(place), + prop, sizeof(prop), + tk, sizeof(tk), + + NULL, 0 +}; + +save(outfile) /* Two passes on data: first to get checksum, second */ +char *outfile; /* to output the data using checksum to start random #s */ +{ + FILE *out; + struct savestruct *p; + char *s; + long sum; + int i; + + crc_start(); + for (p = save_array; p->address != NULL; p++) + sum = crc(p->address, p->width); + srandom((int) sum); + + if ((out = fopen(outfile, "wb")) == NULL) + { + fprintf(stderr, + "Hmm. The name \"%s\" appears to be magically blocked.\n", + outfile); + return 1; + } + fwrite(&sum, sizeof(sum), 1, out); /* Here's the random() key */ + for (p = save_array; p->address != NULL; p++) + { + for (s = p->address, i = 0; i < p->width; i++, s++) + *s = (*s ^ random()) & 0xFF; /* Lightly encrypt */ + fwrite(p->address, p->width, 1, out); + } + fclose(out); + return 0; +} + +restore(infile) +char *infile; +{ + FILE *in; + struct savestruct *p; + char *s; + long sum, cksum; + int i; + + if ((in = fopen(infile, "rb")) == NULL) + { + fprintf(stderr, + "Hmm. The file \"%s\" appears to be magically blocked.\n", + infile); + return 1; + } + fread(&sum, sizeof(sum), 1, in); /* Get the seed */ + srandom((int) sum); + for (p = save_array; p->address != NULL; p++) + { + fread(p->address, p->width, 1, in); + for (s = p->address, i = 0; i < p->width; i++, s++) + *s = (*s ^ random()) & 0xFF; /* Lightly decrypt */ + } + fclose(in); + + crc_start(); /* See if she cheated */ + for (p = save_array; p->address != NULL; p++) + cksum = crc(p->address, p->width); + if (sum != cksum) /* Tsk tsk */ + return 2; /* Altered the file */ + /* 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; +} |