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annotate arogue7/passages.c @ 132:66b0263af424

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arogue7: prevent segfaults when backstabbing while empty-handed. The calculation of the backstabbing multiplier checked the current weapon's properties without making sure the current weapon pointer was not NULL.
author John "Elwin" Edwards
date Tue, 12 May 2015 18:57:30 -0400
parents adfa37e67084
children 1cd604c827a3
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adfa37e67084 Import Advanced Rogue 7.7 from the Roguelike Restoration Project (r1490)
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1 /*
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2 * passages.c - Draw the connecting passages
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 /*
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16 * Draw the connecting passages
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17 *
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18 * @(#)passages.c 3.4 (Berkeley) 6/15/81
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19 */
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20
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21 #include "curses.h"
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22 #include "rogue.h"
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23
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24 /*
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25 * do_passages:
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26 * Draw all the passages on a level.
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27 */
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28
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29 do_passages()
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30 {
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31 register struct rdes *r1, *r2;
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32 register int i, j;
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33 register int roomcount;
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34 static struct rdes
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35 {
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36 bool conn[MAXROOMS]; /* possible to connect to room i? */
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37 bool isconn[MAXROOMS]; /* connection been made to room i? */
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38 bool ingraph; /* this room in graph already? */
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39 } rdes[MAXROOMS] = {
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40 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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46 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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47 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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48 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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49 };
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50
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51 /*
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52 * reinitialize room graph description
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53 */
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54 for (r1 = rdes; r1 <= &rdes[MAXROOMS-1]; r1++)
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55 {
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56 for (j = 0; j < MAXROOMS; j++)
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57 r1->isconn[j] = FALSE;
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58 r1->ingraph = FALSE;
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59 }
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60
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61 /*
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62 * starting with one room, connect it to a random adjacent room and
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63 * then pick a new room to start with.
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64 */
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65 roomcount = 1;
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66 r1 = &rdes[rnd(MAXROOMS)];
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67 r1->ingraph = TRUE;
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68 do
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69 {
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70 /*
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71 * find a room to connect with
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72 */
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73 j = 0;
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74 for (i = 0; i < MAXROOMS; i++)
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75 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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76 r2 = &rdes[i];
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77 /*
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78 * if no adjacent rooms are outside the graph, pick a new room
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79 * to look from
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80 */
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81 if (j == 0)
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82 {
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83 do
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84 r1 = &rdes[rnd(MAXROOMS)];
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85 until (r1->ingraph);
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86 }
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87 /*
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88 * otherwise, connect new room to the graph, and draw a tunnel
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89 * to it
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90 */
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91 else