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annotate arogue5/scrolls.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 ad2cb9a07aaa
children 0298a68cc179
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1 /*
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2 * Read a scroll and let it happen
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 #include "curses.h"
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16 #include <ctype.h>
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c49f7927b0fa arogue5: add missing header files.
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17 #include <stdlib.h>
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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 /*
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24 * let the hero get rid of some type of monster (but not a UNIQUE!)
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25 */
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26 genocide()
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27 {
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28 register struct linked_list *ip;
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29 register struct thing *mp;
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30 register int i;
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31 register struct linked_list *nip;
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32 register int num_monst = NUMMONST-NUMUNIQUE-1, /* cannot genocide uniques */
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33 pres_monst=1,
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34 num_lines=2*(LINES-3);
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35 register int which_monst;
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36 char monst_name[40];
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37
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38 /* Print out the monsters */
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39 while (num_monst > 0) {
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40 register left_limit;
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41
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42 if (num_monst < num_lines) left_limit = (num_monst+1)/2;
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43 else left_limit = num_lines/2;
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44
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45 wclear(hw);
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46 touchwin(hw);
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47
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48 /* Print left column */
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49 wmove(hw, 2, 0);
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50 for (i=0; i<left_limit; i++) {
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51 sprintf(monst_name,
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52 "[%d] %c%s\n",
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53 pres_monst,
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54 monsters[pres_monst].m_normal ? ' ' : '*',
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55 monsters[pres_monst].m_name);
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56 waddstr(hw, monst_name);
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57 pres_monst++;
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58 }
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59
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60 /* Print right column */
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61 for (i=0; i<left_limit && pres_monst<=NUMMONST-NUMUNIQUE-1; i++) {
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62 sprintf(monst_name,
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63 "[%d] %c%s\n",
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64 pres_monst,
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65 monsters[pres_monst].m_normal ? ' ' : '*',
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66 monsters[pres_monst].m_name);
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67 wmove(hw, i+2, COLS/2);
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68 waddstr(hw, monst_name);
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69 pres_monst++;
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70 }
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71
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72 if ((num_monst -= num_lines) > 0) {
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73 mvwaddstr(hw, LINES-1, 0, morestr);
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74 draw(hw);
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75 wait_for(hw,' ');
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76 }
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77
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78 else {
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79 mvwaddstr(hw, 0, 0, "Which monster");
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80 if (!terse) waddstr(hw, " do you wish to wipe out");
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81 waddstr(hw, "? ");
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82 draw(hw);
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83 }
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84 }
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85
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86 get_monst:
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87 get_str(monst_name, hw);
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88 which_monst = atoi(monst_name);
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89 if ((which_monst < 1 || which_monst > NUMMONST-NUMUNIQUE-1)) {
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90 mvwaddstr(hw, 0, 0, "Please enter a number in the displayed range -- ");
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91 draw(hw);
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92 goto get_monst;
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93 }
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94
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95 /* Set up for redraw */
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96 clearok(cw, TRUE);
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97 touchwin(cw);
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98
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99 /* Remove this monster from the present level */
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100 for (ip = mlist; ip; ip = nip) {
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101 mp = THINGPTR(ip);
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102 nip = next(ip);
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103 if (mp->t_index == which_monst) {
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