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annotate xrogue/bolt.c @ 310:827441d05b3e

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Advanced Rogue family: fix some potential buffer overflows. Some code for determining the score file location assumed that PATH_MAX would be less than 1024, which cannot be guaranteed. Advanced Rogue 5 and 7, and XRogue, have had the buffers for the file name enlarged. UltraRogue never called the functions, so the code has been deleted instead.
author John "Elwin" Edwards
date Mon, 03 May 2021 19:05:37 -0400
parents e52a8a7ad4c5
children
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1 /*
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2 bolt.c - functions shooting an object across the room
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include <curses.h>
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20 #include <ctype.h>
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21 #include <string.h>
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22 #include "rogue.h"
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23
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24 /*
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25 * shoot_bolt fires a bolt from the given starting point in the
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26 * given direction
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27 */
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28
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29 void
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30 shoot_bolt(struct thing *shooter, coord start, coord dir, bool get_points,
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31 short reason, char *name, int damage)
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32 {
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33 unsigned char dirch = 0, ch;
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34 bool used, change, see_him;
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35 short y, x, bounces;
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36 coord pos;
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37 struct linked_list *target=NULL;
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38 struct {
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39 coord place;
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40 char oldch;
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41 } spotpos[BOLT_LENGTH];
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42
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43 switch (dir.y + dir.x) {
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44 case 0: dirch = '/';
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45 when 1: case -1: dirch = (dir.y == 0 ? '-' : '|');
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46 when 2: case -2: dirch = '\\';
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47 }
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48 pos.y = start.y + dir.y;
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49 pos.x = start.x + dir.x;
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50 used = FALSE;
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51 change = FALSE;
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52
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53 bounces = 0; /* No bounces yet */
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54 nofont(cw);
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55 for (y = 0; y < BOLT_LENGTH && !used; y++) {
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56 ch = winat(pos.y, pos.x) & A_CHARTEXT;
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57 spotpos[y].place = pos;
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58 spotpos[y].oldch = mvwinch(cw, pos.y, pos.x) & A_CHARTEXT;
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59
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60 /* Are we at hero? */
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61 if (ce(pos, hero)) goto at_hero;
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62
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63 switch (ch) {
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64 case SECRETDOOR:
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65 case VERTWALL:
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66 case HORZWALL:
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67 case ' ':
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68 if (dirch == '-' || dirch == '|') {
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69 dir.y = -dir.y;
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70 dir.x = -dir.x;
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71 }
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72 else {
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73 unsigned char chx = mvinch(pos.y-dir.y, pos.x) & A_CHARTEXT,
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74 chy = mvinch(pos.y, pos.x-dir.x) & A_CHARTEXT;
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75 bool anychange = FALSE; /* Did we change anthing */
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76
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77 if (chy == WALL || chy == SECRETDOOR ||
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78 chy == HORZWALL || chy == VERTWALL) {
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79 dir.y = -dir.y;
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80 change ^= TRUE; /* Change at least one direction */
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81 anychange = TRUE;
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82 }
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83 if (chx == WALL || chx == SECRETDOOR ||
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84 chx == HORZWALL || chx == VERTWALL) {
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85 dir.x = -dir.x;
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86 change ^= TRUE; /* Change at least one direction */
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87 anychange = TRUE;
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88 }
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89
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90 /* If we didn't make any change, make both changes */
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91 if (!anychange) {