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annotate rogue5/wizard.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 f502bf60e6e4
children e7aab31362af
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33
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
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1 /*
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2 * Special wizard commands (some of which are also non-wizard commands
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3 * under strange circumstances)
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4 *
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5 * @(#)wizard.c 4.30 (Berkeley) 02/05/99
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6 *
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7 * Rogue: Exploring the Dungeons of Doom
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8 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
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9 * All rights reserved.
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10 *
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11 * See the file LICENSE.TXT for full copyright and licensing information.
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12 */
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13
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14 #include <stdlib.h>
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15 #include <curses.h>
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16 #include <string.h>
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17 #include <ctype.h>
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18 #include "rogue.h"
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19
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20 /*
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21 * whatis:
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22 * What a certin object is
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23 */
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24
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25 void
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26 whatis(int insist, int type)
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27 {
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28 THING *obj;
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29
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30 if (pack == NULL)
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31 {
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32 msg("you don't have anything in your pack to identify");
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33 return;
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34 }
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35
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36 for (;;)
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37 {
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38 obj = get_item("identify", type);
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39 if (insist)
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40 {
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41 if (n_objs == 0)
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42 return;
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43 else if (obj == NULL)
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44 msg("you must identify something");
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45 else if (type && obj->o_type != type &&
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46 !(type == R_OR_S && (obj->o_type == RING || obj->o_type == STICK)) )
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47 msg("you must identify a %s", type_name(type));
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48 else
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49 break;
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50 }
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51 else
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52 break;
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53 }
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54
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55 if (obj == NULL)
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56 return;
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57
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58 switch (obj->o_type)
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59 {
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60 case SCROLL:
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61 set_know(obj, scr_info);
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62 when POTION:
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63 set_know(obj, pot_info);
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64 when STICK:
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65 set_know(obj, ws_info);
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66 when WEAPON:
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67 case ARMOR:
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68 obj->o_flags |= ISKNOW;
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69 when RING:
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70 set_know(obj, ring_info);
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71 }
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72 msg(inv_name(obj, FALSE));
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73 }
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74
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75 /*
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76 * set_know:
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77 * Set things up when we really know what a thing is
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78 */
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79
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80 void
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81 set_know(THING *obj, struct obj_info *info)
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82 {
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83 char **guess;
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84
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85 info[obj->o_which].oi_know = TRUE;
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86 obj->o_flags |= ISKNOW;
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87 guess = &info[obj->o_which].oi_guess;
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88 if (*guess)
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89 {
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90 free(*guess);
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91 *guess = NULL;
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92 }
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93 }
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94
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95 /*
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96 * type_name:
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97 * Return a pointer to the name of the type
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98 */
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99 const char *
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100 type_name(int type)
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101 {
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102 struct h_list *hp;
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103 struct h_list tlist[] = {
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104 {POTION, "potion", FALSE},
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105 {SCROLL, "scroll", FALSE},
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106 {FOOD, "food", FALSE},
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107 {R_OR_S, "ring, wand or staff", FALSE},
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