2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * The game adventure was originally written in Fortran by Will Crowther
6 * and Don Woods. It was later translated to C and enhanced by Jim
7 * Gillogly. This code is derived from software contributed to Berkeley
8 * by Jim Gillogly at The Rand Corporation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 static char sccsid[] = "@(#)save.c 8.1 (Berkeley) 5/31/93";
43 static const char rcsid[] =
49 #include <sys/types.h>
58 struct savestruct save_array[] =
60 {&abbnum, sizeof(abbnum)},
61 {&attack, sizeof(attack)},
62 {&blklin, sizeof(blklin)},
63 {&bonus, sizeof(bonus)},
64 {&chloc, sizeof(chloc)},
65 {&chloc2, sizeof(chloc2)},
66 {&clock1, sizeof(clock1)},
67 {&clock2, sizeof(clock2)},
68 {&closed, sizeof(closed)},
69 {&closng, sizeof(closng)},
70 {&daltlc, sizeof(daltlc)},
71 {&demo, sizeof(demo)},
72 {&detail, sizeof(detail)},
73 {&dflag, sizeof(dflag)},
74 {&dkill, sizeof(dkill)},
75 {&dtotal, sizeof(dtotal)},
76 {&foobar, sizeof(foobar)},
77 {&gaveup, sizeof(gaveup)},
78 {&holdng, sizeof(holdng)},
79 {&iwest, sizeof(iwest)},
82 {&knfloc, sizeof(knfloc)},
84 {&latncy, sizeof(latncy)},
85 {&limit, sizeof(limit)},
86 {&lmwarn, sizeof(lmwarn)},
88 {&maxdie, sizeof(maxdie)},
89 {&mxscor, sizeof(mxscor)},
90 {&newloc, sizeof(newloc)},
91 {&numdie, sizeof(numdie)},
93 {&oldlc2, sizeof(oldlc2)},
94 {&oldloc, sizeof(oldloc)},
95 {&panic, sizeof(panic)},
96 {&saved, sizeof(saved)},
97 {&savet, sizeof(savet)},
98 {&scorng, sizeof(scorng)},
100 {&stick, sizeof(stick)},
101 {&tally, sizeof(tally)},
102 {&tally2, sizeof(tally2)},
104 {&turns, sizeof(turns)},
105 {&verb, sizeof(verb)},
108 {&wzdark, sizeof(wzdark)},
110 {atloc, sizeof(atloc)},
111 {dloc, sizeof(dloc)},
112 {dseen, sizeof(dseen)},
113 {fixed, sizeof(fixed)},
114 {hinted, sizeof(hinted)},
115 {linkx, sizeof(linkx)},
116 {odloc, sizeof(odloc)},
117 {place, sizeof(place)},
118 {prop, sizeof(prop)},
125 save(outfile) /* Two passes on data: first to get checksum, second */
126 const char *outfile; /* to output the data using checksum to start random #s */
129 struct savestruct *p;
135 for (p = save_array; p->address != NULL; p++)
136 sum = crc(p->address, p->width);
139 if ((out = fopen(outfile, "wb")) == NULL)
142 "Hmm. The name \"%s\" appears to be magically blocked.\n",
147 fwrite(&sum, sizeof(sum), 1, out); /* Here's the random() key */
148 for (p = save_array; p->address != NULL; p++)
150 for (s = p->address, i = 0; i < p->width; i++, s++)
151 *s = (*s ^ random()) & 0xFF; /* Lightly encrypt */
152 fwrite(p->address, p->width, 1, out);
163 struct savestruct *p;
169 if ((in = fopen(infile, "rb")) == NULL)
172 "Hmm. The file \"%s\" appears to be magically blocked.\n",
177 fread(&sum, sizeof(sum), 1, in); /* Get the seed */
179 for (p = save_array; p->address != NULL; p++)
181 fread(p->address, p->width, 1, in);
182 for (s = p->address, i = 0; i < p->width; i++, s++)
183 *s = (*s ^ random()) & 0xFF; /* Lightly decrypt */
187 crc_start(); /* See if she cheated */
188 for (p = save_array; p->address != NULL; p++)
189 cksum = crc(p->address, p->width);
190 if (sum != cksum) /* Tsk tsk */
191 return 2; /* Altered the file */
192 /* We successfully restored, so this really was a save file */
193 /* Get rid of the file, but don't bother checking that we did */