Mercurial > hg > early-roguelike
annotate rogue4/new_level.c @ 83:09db0cf536af
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 |
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date | Thu, 08 Aug 2013 12:41:35 -0700 |
parents | 9535a08ddc39 |
children | 1b73a8641b37 |
rev | line source |
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12
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1 /* |
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2 * new_level: |
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3 * Dig and draw a new level |
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4 * |
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5 * @(#)new_level.c 4.19 (Berkeley) 1/12/82 |
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6 * |
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7 * Rogue: Exploring the Dungeons of Doom |
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8 * Copyright (C) 1980, 1981, 1982 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 <time.h> |
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15 #include <curses.h> |
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16 #include <string.h> |
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17 #include "rogue.h" |
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18 |
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19 #define TREAS_ROOM 20 /* one chance in TREAS_ROOM for a treasure room */ |
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20 #define MAXTREAS 10 /* maximum number of treasures in a treasure room */ |
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21 #define MINTREAS 2 /* minimum number of treasures in a treasure room */ |
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22 |
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23 new_level() |
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24 { |
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25 register int rm, i; |
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26 register THING *tp; |
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27 register char *sp; |
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28 register THING **mp; |
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29 register int index; |
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30 coord stairs; |
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31 |
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32 player.t_flags &= ~ISHELD; /* unhold when you go down just in case */ |
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33 if (level > max_level) |
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34 max_level = level; |
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35 /* |
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36 * Clean things off from last level |
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37 */ |
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38 clear(); |
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39 for (sp = _level; sp < &_level[MAXCOLS*MAXLINES]; ) |
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40 *sp++ = ' '; |
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41 for (sp = _flags; sp < &_flags[MAXCOLS*MAXLINES]; ) |
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42 *sp++ = F_REAL; |
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43 for (mp = _monst; mp < &_monst[MAXCOLS*MAXLINES]; ) |
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44 *mp++ = NULL; |
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45 clear(); |
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46 /* |
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47 * Free up the monsters on the last level |
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48 */ |
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49 for (tp = mlist; tp != NULL; tp = next(tp)) |
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50 free_list(tp->t_pack); |
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51 free_list(mlist); |
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52 /* |
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53 * Throw away stuff left on the previous level (if anything) |
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54 */ |
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55 free_list(lvl_obj); |
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56 do_rooms(); /* Draw rooms */ |
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57 do_passages(); /* Draw passages */ |
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58 no_food++; |
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59 put_things(); /* Place objects (if any) */ |
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60 /* |
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61 * Place the staircase down. |
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62 */ |
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63 i = 0; |
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64 do { |
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65 rm = rnd_room(); |
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66 rnd_pos(&rooms[rm], &stairs); |
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67 index = INDEX(stairs.y, stairs.x); |
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68 if (i++ > 100) |
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69 { |
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70 i = 0; |
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71 srand(getpid() + (int) time((time_t *) NULL)); |
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72 } |
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73 } until (_level[index] == FLOOR); |
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74 _level[index] = STAIRS; |
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75 /* |
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76 * Place the traps |
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77 */ |
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78 if (rnd(10) < level) |
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79 { |
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80 ntraps = rnd(level / 4) + 1; |
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81 if (ntraps > MAXTRAPS) |
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82 ntraps = MAXTRAPS; |
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83 i = ntraps; |
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84 while (i--) |
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85 { |
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86 do |
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87 { |
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88 rm = rnd_room(); |
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89 rnd_pos(&rooms[rm], &stairs); |
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90 index = INDEX(stairs.y, stairs.x); |
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91 } until (_level[index] == FLOOR && (_flags[index] & F_REAL)); |
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92 sp = &_flags[index]; |
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93 *sp &= ~(F_REAL | F_TMASK); |
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94 *sp |= rnd(NTRAPS); |
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95 } |
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96 } |
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97 do |
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98 { |
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99 rm = rnd_room(); |
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100 rnd_pos(&rooms[rm], &hero); |
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101 index = INDEX(hero.y, hero.x); |
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102 } until (_level[index] == FLOOR && (_flags[index] & F_REAL) |
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103 && _monst[index] == NULL); |