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annotate arogue5/sticks.c @ 83:09db0cf536af

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Properly handle invalid room references in savefiles. In all games, rs_write_room_reference() stored -1 for a nonexistent room, but rs_read_room_reference() did not check for out-of-bounds values, leading to pointers to rooms[-1], which sometimes caused crashes. rs_read_room_reference() has now been modified to use NULL instead. Some of the games required further changes to replace NULL with the pointer to the actual room. Others are capable of handling NULL for objects not in any room.
author John "Elwin" Edwards
date Thu, 08 Aug 2013 12:41:35 -0700
parents c49f7927b0fa
children 56e748983fa8
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1 /*
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2 * Functions to implement the various sticks one might find
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3 * while wandering around the dungeon.
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4 *
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5 * Advanced Rogue
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6 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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7 * All rights reserved.
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8 *
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9 * Based on "Rogue: Exploring the Dungeons of Doom"
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10 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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11 * All rights reserved.
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12 *
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13 * See the file LICENSE.TXT for full copyright and licensing information.
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14 */
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15
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16 #include "curses.h"
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17 #include <ctype.h>
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c49f7927b0fa arogue5: add missing header files.
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18 #include <string.h>
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19 #include "rogue.h"
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20
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21
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22 /*
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23 * zap a stick and see what happens
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24 */
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25 do_zap(gotdir, which, flag)
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26 bool gotdir;
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27 int which;
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28 int flag;
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29 {
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30 register struct linked_list *item;
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31 register struct object *obj = NULL;
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32 register struct thing *tp;
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33 register int y, x;
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34 struct linked_list *nitem;
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35 struct object *nobj;
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36 bool cursed, blessed, is_stick;
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37
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38 blessed = FALSE;
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39 cursed = FALSE;
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40 is_stick = FALSE;
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41
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42 if (which == 0) {
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43 if ((item = get_item(pack, "zap with", ZAPPABLE)) == NULL)
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44 return(FALSE);
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45 obj = OBJPTR(item);
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46
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47 /* Handle relics specially here */
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48 if (obj->o_type == RELIC) {
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49 switch (obj->o_which) {
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50 case ORCUS_WAND:
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51 msg(nothing);
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52 return(TRUE);
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53 when MING_STAFF:
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54 which = WS_MISSILE;
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55 when ASMO_ROD:
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56 switch (rnd(3)) {
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57 case 0:
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58 which = WS_ELECT;
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59 when 1:
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60 which = WS_COLD;
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61 otherwise:
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62 which = WS_FIRE;
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63 }
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64 }
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65 cursed = FALSE;
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66 blessed = FALSE;
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67 }
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68 else {
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69 which = obj->o_which;
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70 ws_know[which] = TRUE;
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71 cursed = (obj->o_flags & ISCURSED) != 0;
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72 blessed = (obj->o_flags & ISBLESSED) != 0;
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73 is_stick = TRUE;
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74 }
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75 }
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76 else {
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77 cursed = flag & ISCURSED;
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78 blessed = flag & ISBLESSED;
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79 }
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80 switch (which) { /* no direction for these */
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81 case WS_LIGHT:
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82 case WS_DRAIN:
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83 case WS_CHARGE:
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84 case WS_CURING:
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85 break;
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86
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87 default:
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88 if (!get_dir())
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89 return(FALSE);
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90 if (!gotdir) {
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91 do {
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92 delta.y = rnd(3) - 1;
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93 delta.x = rnd(3) - 1;
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94 } while (delta.y == 0 && delta.x == 0);
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95 }
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96 }
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97
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98 if (is_stick) {
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99 if (obj->o_charges < 1) {
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100 msg(nothing);
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101 return(TRUE);
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102 }
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103 obj->o_charges--;
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104 }
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105