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annotate rogue3/scrolls.c @ 110:5f51f7d9805f

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arogue5: fix some save/restore-related crashes. The save/restore code took the pointer intended as an argument for the doctor() daemon and wrote it to the savefile as an int. I don't know why it took so long to fail horribly. The problem has been avoided by replacing the value with &player when restoring. That seems to be the only argument ever actually used. The code also writes only four bytes for an unsigned long; if sizeof(long) == 8, it casts to unsigned int first. It failed to do the cast when reading back, with the result that four bytes were read and the other half of the number was effectively uninitialized. It apparently works now, but the save/restore code ought still to be regarded as decidedly unfortunate.
author John "Elwin" Edwards
date Mon, 06 Jan 2014 15:57:17 -0500
parents 527e2150eaf0
children
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1
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2 /*
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3 * Read a scroll and let it happen
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4 *
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5 * @(#)scrolls.c 3.5 (Berkeley) 6/15/81
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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 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 "curses.h"
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15 #include <stdlib.h>
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16 #include <ctype.h>
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17 #include <string.h>
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18 #include "rogue.h"
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19
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20 void
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21 read_scroll()
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22 {
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23 struct object *obj;
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24 struct linked_list *item;
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25 struct room *rp;
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26 int i,j;
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27 int ch, nch;
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28 struct linked_list *titem;
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29 char buf[80];
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30
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31 item = get_item("read", SCROLL);
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32 if (item == NULL)
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33 return;
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34 obj = (struct object *) ldata(item);
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35 if (obj->o_type != SCROLL)
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36 {
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37 if (!terse)
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38 msg("There is nothing on it to read");
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39 else
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40 msg("Nothing to read");
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41 return;
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42 }
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43 msg("As you read the scroll, it vanishes.");
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44 /*
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45 * Calculate the effect it has on the poor guy.
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46 */
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47 if (obj == cur_weapon)
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48 cur_weapon = NULL;
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49 switch(obj->o_which)
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50 {
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51 case S_CONFUSE:
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52 /*
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53 * Scroll of monster confusion. Give him that power.
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54 */
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55 msg("Your hands begin to glow red");
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56 player.t_flags |= CANHUH;
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57 when S_LIGHT:
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58 s_know[S_LIGHT] = TRUE;
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59 if ((rp = roomin(&hero)) == NULL)
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60 msg("The corridor glows and then fades");
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61 else
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62 {
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63 addmsg("The room is lit");
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64 if (!terse)
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65 addmsg(" by a shimmering blue light.");
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66 endmsg();
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67 rp->r_flags &= ~ISDARK;
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68 /*
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69 * Light the room and put the player back up
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70 */
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71 light(&hero);
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72 mvwaddch(cw, hero.y, hero.x, PLAYER);
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73 }
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74 when S_ARMOR:
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75 if (cur_armor != NULL)
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76 {
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77 msg("Your armor glows faintly for a moment");
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78 cur_armor->o_ac--;
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79 cur_armor->o_flags &= ~ISCURSED;
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80 }
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81 when S_HOLD:
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82 /*
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83 * Hold monster scroll. Stop all monsters within two spaces
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84 * from chasing after the hero.
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85 */
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86 {
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87 int x,y;
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88 struct linked_list *mon;
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89
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90 for (x = hero.x-2; x <= hero.x+2; x++)
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91 for (y = hero.y-2; y <= hero.y+2; y++)
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92 if (y > 0 && x > 0 && isupper(mvwinch(mw, y, x)))
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93 if ((mon = find_mons(y, x)) != NULL)
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94 {
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95 struct thing *th;
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96
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97 th = (struct thing *) ldata(mon);
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98 th->t_flags &= ~ISRUN;
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99 th->t_flags |= ISHELD;
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100 }
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101 }
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102 when S_SLEEP:
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103 /*
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104 * Scroll which makes you fall asleep
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