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annotate rogue5/rooms.c @ 75:19903deed392

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arogue5: fix the crash when checking prices in shops. A buffer called curpurch, which stores a description of an item in a trading post which the player might be interested in, was only 15 bytes. It was overflowing into oldrp, a room pointer, leading to segfaults. The size of curpurch has been increased to LINELEN*2, which matches the size of prbuf, which is returned by inv_name and then strcpy()'d to curpurch. As long as nothing overflows prbuf it should be safe now. NOTE that this breaks savefile compatibility.
author John "Elwin" Edwards <elwin@sdf.org>
date Wed, 05 Sep 2012 10:14:34 -0700
parents f502bf60e6e4
children
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33
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1 /*
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2 * Create the layout for the new level
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3 *
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4 * @(#)rooms.c 4.45 (Berkeley) 02/05/99
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include <ctype.h>
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14 #include <curses.h>
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15 #include "rogue.h"
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16
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17 typedef struct spot { /* position matrix for maze positions */
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18 int nexits;
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19 coord exits[4];
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20 int used;
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21 } SPOT;
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22
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23 #define GOLDGRP 1
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24
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25 /*
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26 * do_rooms:
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27 * Create rooms and corridors with a connectivity graph
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28 */
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29
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30 void
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31 do_rooms(void)
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32 {
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33 int i;
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34 struct room *rp;
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35 THING *tp;
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36 int left_out;
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37 coord top;
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38 coord bsze; /* maximum room size */
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39 coord mp;
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40
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41 bsze.x = NUMCOLS / 3;
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42 bsze.y = NUMLINES / 3;
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43 /*
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44 * Clear things for a new level
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45 */
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46 for (rp = rooms; rp < &rooms[MAXROOMS]; rp++)
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47 {
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48 rp->r_goldval = 0;
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49 rp->r_nexits = 0;
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50 rp->r_flags = 0;
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51 }
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52 /*
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53 * Put the gone rooms, if any, on the level
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54 */
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55 left_out = rnd(4);
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56 for (i = 0; i < left_out; i++)
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57 rooms[rnd_room()].r_flags |= ISGONE;
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58 /*
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59 * dig and populate all the rooms on the level
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60 */
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61 for (i = 0, rp = rooms; i < MAXROOMS; rp++, i++)
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62 {
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63 /*
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64 * Find upper left corner of box that this room goes in
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65 */
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66 top.x = (i % 3) * bsze.x + 1;
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67 top.y = (i / 3) * bsze.y;
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68 if (rp->r_flags & ISGONE)
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69 {
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70 /*
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71 * Place a gone room. Make certain that there is a blank line
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72 * for passage drawing.
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73 */
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74 do
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75 {
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76 rp->r_pos.x = top.x + rnd(bsze.x - 2) + 1;
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77 rp->r_pos.y = top.y + rnd(bsze.y - 2) + 1;
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78 rp->r_max.x = -NUMCOLS;
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79 rp->r_max.y = -NUMLINES;
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80 } until (rp->r_pos.y > 0 && rp->r_pos.y < NUMLINES-1);
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81 continue;
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82 }
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83 /*
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84 * set room type
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85 */
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86 if (rnd(10) < level - 1)
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87 {
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88 rp->r_flags |= ISDARK; /* dark room */
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89 if (rnd(15) == 0)
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90 rp->r_flags = ISMAZE; /* maze room */
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91 }
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92 /*
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93 * Find a place and size for a random room
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94 */
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95 if (rp->r_flags & ISMAZE)
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96 {
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97 rp->r_max.x = bsze.x - 1;
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98 rp->r_max.y = bsze.y - 1;
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99 if ((rp->r_pos.x = top.x) == 1)
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100 rp->r_pos.x = 0;
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101 if ((rp->r_pos.y = top.y) == 0)
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102 {
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103 rp->r_pos.y++;
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104 rp->r_max.y--;
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105 }
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106 }
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107 else
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