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annotate rogue5/monsters.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
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33
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1 /*
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2 * File with various monster functions in it
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3 *
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4 * @(#)monsters.c 4.46 (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 <curses.h>
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14 #include <string.h>
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15 #include "rogue.h"
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16 #include <ctype.h>
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17
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18 /*
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19 * List of monsters in rough order of vorpalness
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20 */
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21 static const int lvl_mons[] = {
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22 'K', 'E', 'B', 'S', 'H', 'I', 'R', 'O', 'Z', 'L', 'C', 'Q', 'A',
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23 'N', 'Y', 'F', 'T', 'W', 'P', 'X', 'U', 'M', 'V', 'G', 'J', 'D'
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24 };
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25
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26 static const int wand_mons[] = {
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27 'K', 'E', 'B', 'S', 'H', 0, 'R', 'O', 'Z', 0, 'C', 'Q', 'A',
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28 0, 'Y', 0, 'T', 'W', 'P', 0, 'U', 'M', 'V', 'G', 'J', 0
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29 };
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30
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31 /*
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32 * randmonster:
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33 * Pick a monster to show up. The lower the level,
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34 * the meaner the monster.
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35 */
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36 int
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37 randmonster(int wander)
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38 {
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39 int d;
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40 const int *mons;
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41
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42 mons = (wander ? wand_mons : lvl_mons);
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43 do
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44 {
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45 d = level + (rnd(10) - 6);
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46 if (d < 0)
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47 d = rnd(5);
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48 if (d > 25)
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49 d = rnd(5) + 21;
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50 } while (mons[d] == 0);
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51 return mons[d];
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52 }
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53
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54 /*
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55 * new_monster:
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56 * Pick a new monster and add it to the list
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57 */
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58
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59 void
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60 new_monster(THING *tp, int type, const coord *cp)
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61 {
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62 struct monster *mp;
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63 int lev_add;
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64
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65 if ((lev_add = level - AMULETLEVEL) < 0)
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66 lev_add = 0;
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67 attach(mlist, tp);
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68 tp->t_type = type;
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69 tp->t_disguise = type;
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70 tp->t_pos = *cp;
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71 move(cp->y, cp->x);
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72 tp->t_oldch = CCHAR( inch() );
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73 tp->t_room = roomin(cp);
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74 moat(cp->y, cp->x) = tp;
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75 mp = &monsters[tp->t_type-'A'];
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76 tp->t_stats.s_lvl = mp->m_stats.s_lvl + lev_add;
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77 tp->t_stats.s_maxhp = tp->t_stats.s_hpt = roll(tp->t_stats.s_lvl, 8);
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78 tp->t_stats.s_arm = mp->m_stats.s_arm - lev_add;
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79 strcpy(tp->t_stats.s_dmg,mp->m_stats.s_dmg);
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80 tp->t_stats.s_str = mp->m_stats.s_str;
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81 tp->t_stats.s_exp = mp->m_stats.s_exp + lev_add * 10 + exp_add(tp);
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82 tp->t_flags = mp->m_flags;
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83 if (level > 29)
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84 tp->t_flags |= ISHASTE;
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85 tp->t_turn = TRUE;
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86 tp->t_pack = NULL;
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87 if (ISWEARING(R_AGGR))
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88 runto(cp);
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89 if (type == 'X')
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90 tp->t_disguise = rnd_thing();
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91 }
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92
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93 /*
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94 * expadd:
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95 * Experience to add for this monster's level/hit points
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96 */
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97 int
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98 exp_add(const THING *tp)
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99 {
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100 int mod;
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101
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102 if (tp->t_stats.s_lvl == 1)
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103 mod = tp->t_stats.s_maxhp / 8;
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104 else
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105 mod = tp->t_stats.s_maxhp / 6;
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106 if (tp->t_stats.s_lvl > 9)