Mercurial > hg > early-roguelike
annotate srogue/passages.c @ 280:70aa5808c782
Fix potential segfaults at restore related to ctime().
In some games, restore() passes the result of ctime() to mvprintw() or
some other variadic message-formatting function. If ctime() has not
been declared properly, its return type is inferred to be int instead
of char *. This does not cause a warning because the compiler does not
know the correct type of variadic arguments.
On platforms where ints and pointers are not the same size, this can,
probably depending on alignment, result in a segfault that is not easy
to trace.
Including time.h fixes the problem. Some games manually declared
ctime() and avoided the bug. These declarations have also been
replaced with the include.
author | John "Elwin" Edwards |
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date | Fri, 15 Sep 2017 20:51:10 -0400 |
parents | 94a0d9dd5ce1 |
children | e52a8a7ad4c5 |
rev | line source |
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36
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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 9.0 (rdk) 7/17/84 |
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5 * |
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6 * Super-Rogue |
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7 * Copyright (C) 1984 Robert D. Kindelberger |
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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 |
217
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17 #include <stdlib.h> |
36
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18 #include "rogue.h" |
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19 #include "rogue.ext" |
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20 |
217
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21 void conn(int r1, int r2); |
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22 void door(struct room *rm, struct coord *cp); |
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23 |
36
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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 void |
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30 do_passages(void) |
36
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31 { |
183 | 32 reg struct rdes *r1, *r2 = NULL; |
36
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33 reg int i, j; |
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34 reg int roomcount; |
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35 static struct rdes { |
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36 bool conn[MAXROOMS]; /* possible to connect to room i */ |
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37 bool isconn[MAXROOMS]; /* connection was 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]; r1++) { |
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55 for (j = 0; j < MAXROOMS; j++) |
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56 r1->isconn[j] = FALSE; |
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57 r1->ingraph = FALSE; |
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58 } |
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59 |
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60 /* |
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61 * starting with one room, connect it to a random adjacent room and |
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62 * then pick a new room to start with. |
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63 */ |
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64 roomcount = 1; |
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65 r1 = &rdes[rnd(MAXROOMS)]; |
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66 r1->ingraph = TRUE; |
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67 do { |
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68 /* |
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69 * find a room to connect with |
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70 */ |
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71 j = 0; |
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72 for (i = 0; i < MAXROOMS; i++) |
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73 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0) |
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74 r2 = &rdes[i]; |
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75 /* |
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76 * if no adjacent rooms are outside the graph, pick a new room |
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77 * to look from |
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78 */ |
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79 if (j == 0) { |
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80 do { |
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81 r1 = &rdes[rnd(MAXROOMS)]; |
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82 } until (r1->ingraph); |
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83 } |
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84 /* |
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85 * otherwise, connect new room to the graph, and draw a tunnel |
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86 * to it |
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87 */ |
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88 else { |
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89 r2->ingraph = TRUE; |
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90 i = r1 - rdes; |
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91 j = 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. |