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annotate arogue5/passages.c @ 81:0e212d46b68f

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rogue4: don't put savefile metadata into the savefile. The save_file() function in save.c stored the savefile's device number, inode number, creation time, and modification time in the file. The restore() function read them back, and apparently used to compare them to protect against cheaters. Unfortunately, the types and sizes of these numbers differ from system to system, which ruins the Roguelike Restoration Project's fine portability work. So they have been removed from the savefile. This BREAKS SAVEFILE COMPATIBILITY, but old files can be converted by excising the chunk starting at offset 0x22 with length sizeof(ino_t) + sizeof(dev_t) + 2 * sizeof(time_t). That's 0x14 on i686 and 0x20 on x86_64, at least with current versions of Linux and glibc.
author John "Elwin" Edwards
date Mon, 05 Aug 2013 20:49:41 -0700
parents 0ed67132cf10
children 56e748983fa8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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63
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1 /*
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2 * Draw the connecting passages
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3 *
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4 * @(#)passages.c 3.4 (Berkeley) 6/15/81
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5 *
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6 * Advanced Rogue
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7 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include "curses.h"
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18 #include "rogue.h"
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19
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20 /*
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21 * do_passages:
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22 * Draw all the passages on a level.
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23 */
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24
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25 do_passages()
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26 {
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27 register struct rdes *r1, *r2 = NULL;
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28 register int i, j;
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29 register int roomcount;
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30 static struct rdes
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31 {
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32 bool conn[MAXROOMS]; /* possible to connect to room i? */
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33 bool isconn[MAXROOMS]; /* connection been made to room i? */
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34 bool ingraph; /* this room in graph already? */
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35 } rdes[MAXROOMS] = {
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36 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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37 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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38 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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39 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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40 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 };
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46
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47 /*
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48 * reinitialize room graph description
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49 */
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50 for (r1 = rdes; r1 <= &rdes[MAXROOMS-1]; r1++)
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51 {
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52 for (j = 0; j < MAXROOMS; j++)
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53 r1->isconn[j] = FALSE;
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54 r1->ingraph = FALSE;
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55 }
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56
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57 /*
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58 * starting with one room, connect it to a random adjacent room and
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59 * then pick a new room to start with.
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60 */
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61 roomcount = 1;
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62 r1 = &rdes[rnd(MAXROOMS)];
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63 r1->ingraph = TRUE;
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64 do
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65 {
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66 /*
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67 * find a room to connect with
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68 */
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69 j = 0;
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70 for (i = 0; i < MAXROOMS; i++)
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71 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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72 r2 = &rdes[i];
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73 /*
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74 * if no adjacent rooms are outside the graph, pick a new room
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75 * to look from
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76 */
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77 if (j == 0)
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78 {
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79 do
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80 r1 = &rdes[rnd(MAXROOMS)];
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81 until (r1->ingraph);
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82 }
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83 /*
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84 * otherwise, connect new room to the graph, and draw a tunnel
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85 * to it
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86 */
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87 else
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88 {
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89 r2->ingraph = TRUE;
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90 i = (int)(r1 - rdes);
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91 j = (int)(r2 - rdes);
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92 conn(i, j);
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93 r1->isconn[j] = TRUE;
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94 r2->isconn[i] = TRUE;
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95 roomcount++;
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96 }
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97 } while (roomcount < MAXROOMS);
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98
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99 /*
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100 * attempt to add passages to the graph a random number of times so
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101 * that there isn't just one unique passage through it.
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102 */
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103 for (roomcount = rnd(5); roomcount > 0; roomcount--)