save.c revision 1.2
1 /* $NetBSD: save.c,v 1.2 1995/03/21 12:05:08 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * The game adventure was originally written in Fortran by Will Crowther 8 * and Don Woods. It was later translated to C and enhanced by Jim 9 * Gillogly. This code is derived from software contributed to Berkeley 10 * by Jim Gillogly at The Rand Corporation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)save.c 8.1 (Berkeley) 5/31/93"; 44 #else 45 static char rcsid[] = "$NetBSD: save.c,v 1.2 1995/03/21 12:05:08 cgd Exp $"; 46 #endif 47 #endif /* not lint */ 48 49 #include <stdio.h> 50 #include "hdr.h" 51 52 struct savestruct 53 { 54 void *address; 55 int width; 56 }; 57 58 struct savestruct save_array[] = 59 { 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), 80 &k, sizeof(k), 81 &k2, sizeof(k2), 82 &knfloc, sizeof(knfloc), 83 &kq, sizeof(kq), 84 &latncy, sizeof(latncy), 85 &limit, sizeof(limit), 86 &lmwarn, sizeof(lmwarn), 87 &loc, sizeof(loc), 88 &maxdie, sizeof(maxdie), 89 &mxscor, sizeof(mxscor), 90 &newloc, sizeof(newloc), 91 &numdie, sizeof(numdie), 92 &obj, sizeof(obj), 93 &oldlc2, sizeof(oldlc2), 94 &oldloc, sizeof(oldloc), 95 &panic, sizeof(panic), 96 &saved, sizeof(saved), 97 &savet, sizeof(savet), 98 &scorng, sizeof(scorng), 99 &spk, sizeof(spk), 100 &stick, sizeof(stick), 101 &tally, sizeof(tally), 102 &tally2, sizeof(tally2), 103 &tkk, sizeof(tkk), 104 &turns, sizeof(turns), 105 &verb, sizeof(verb), 106 &wd1, sizeof(wd1), 107 &wd2, sizeof(wd2), 108 &wzdark, sizeof(wzdark), 109 &yea, sizeof(yea), 110 atloc, sizeof(atloc), 111 dloc, sizeof(dloc), 112 dseen, sizeof(dseen), 113 fixed, sizeof(fixed), 114 hinted, sizeof(hinted), 115 link, sizeof(link), 116 odloc, sizeof(odloc), 117 place, sizeof(place), 118 prop, sizeof(prop), 119 tk, sizeof(tk), 120 121 NULL, 0 122 }; 123 124 save(outfile) /* Two passes on data: first to get checksum, second */ 125 char *outfile; /* to output the data using checksum to start random #s */ 126 { 127 FILE *out; 128 struct savestruct *p; 129 char *s; 130 long sum; 131 int i; 132 133 crc_start(); 134 for (p = save_array; p->address != NULL; p++) 135 sum = crc(p->address, p->width); 136 srandom((int) sum); 137 138 if ((out = fopen(outfile, "wb")) == NULL) 139 { 140 fprintf(stderr, 141 "Hmm. The name \"%s\" appears to be magically blocked.\n", 142 outfile); 143 return 1; 144 } 145 fwrite(&sum, sizeof(sum), 1, out); /* Here's the random() key */ 146 for (p = save_array; p->address != NULL; p++) 147 { 148 for (s = p->address, i = 0; i < p->width; i++, s++) 149 *s = (*s ^ random()) & 0xFF; /* Lightly encrypt */ 150 fwrite(p->address, p->width, 1, out); 151 } 152 fclose(out); 153 return 0; 154 } 155 156 restore(infile) 157 char *infile; 158 { 159 FILE *in; 160 struct savestruct *p; 161 char *s; 162 long sum, cksum; 163 int i; 164 165 if ((in = fopen(infile, "rb")) == NULL) 166 { 167 fprintf(stderr, 168 "Hmm. The file \"%s\" appears to be magically blocked.\n", 169 infile); 170 return 1; 171 } 172 fread(&sum, sizeof(sum), 1, in); /* Get the seed */ 173 srandom((int) sum); 174 for (p = save_array; p->address != NULL; p++) 175 { 176 fread(p->address, p->width, 1, in); 177 for (s = p->address, i = 0; i < p->width; i++, s++) 178 *s = (*s ^ random()) & 0xFF; /* Lightly decrypt */ 179 } 180 fclose(in); 181 182 crc_start(); /* See if she cheated */ 183 for (p = save_array; p->address != NULL; p++) 184 cksum = crc(p->address, p->width); 185 if (sum != cksum) /* Tsk tsk */ 186 return 2; /* Altered the file */ 187 /* We successfully restored, so this really was a save file */ 188 /* Get rid of the file, but don't bother checking that we did */ 189 return 0; 190 } 191
Indexes created Tue Sep 30 11:09:46 GMT 2025