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annotate rogue5/daemon.c @ 227:696277507a2e

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Rogue V4, V5: disable a cheat granting permanent monster detection. In these two games, a potion of monster detection turns on the player's SEEMONST flag. A fuse is set to call turn_see() to turn the flag back off. But the save and restore functions do not recognize turn_see() and fail to set the fuse up again. When restoring, Rogue V4 merely sets the fuse's function to NULL and leaves it burning. When it goes off, a segfault results. Rogue V5 clears all the fuse's fields, and the player retains the ability to see all monsters on the level. The save and restore code can now handle the fuse. The function used is a new wrapper, turn_see_off(), which should lead to less problems with daemons being multiple incompatible types. Also, Rogue V4 and Super-Rogue now properly clear unrecognized daemon and fuse slots when restoring a saved game.
author John "Elwin" Edwards
date Sat, 05 Mar 2016 12:10:20 -0500
parents f502bf60e6e4
children
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33
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1 /*
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2 * Contains functions for dealing with things that happen in the
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3 * future.
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4 *
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5 * @(#)daemon.c 4.7 (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 <curses.h>
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15 #include "rogue.h"
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16
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17 #define DAEMON -1
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18
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19 /*
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20 * d_slot:
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21 * Find an empty slot in the daemon/fuse list
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22 */
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23 struct delayed_action *
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24 d_slot(void)
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25 {
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26 struct delayed_action *dev;
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27
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28 for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
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29 if (dev->d_type == EMPTY)
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30 return dev;
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31 #ifdef MASTER
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32 debug("Ran out of fuse slots");
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33 #endif
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34 return NULL;
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35 }
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36
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37 /*
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38 * find_slot:
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39 * Find a particular slot in the table
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40 */
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41 struct delayed_action *
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42 find_slot(void (*func)())
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43 {
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44 struct delayed_action *dev;
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45
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46 for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
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47 if (dev->d_type != EMPTY && func == dev->d_func)
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48 return dev;
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49 return NULL;
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50 }
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51
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52 /*
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53 * start_daemon:
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54 * Start a daemon, takes a function.
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55 */
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56 void
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57 start_daemon(void (*func)(), int arg, int type)
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58 {
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59 struct delayed_action *dev;
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60
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61 dev = d_slot();
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62 dev->d_type = type;
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63 dev->d_func = func;
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64 dev->d_arg = arg;
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65 dev->d_time = DAEMON;
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66 }
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67
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68 /*
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69 * kill_daemon:
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70 * Remove a daemon from the list
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71 */
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72 void
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73 kill_daemon(void (*func)())
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74 {
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75 struct delayed_action *dev;
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76
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77 if ((dev = find_slot(func)) == NULL)
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78 return;
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79 /*
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80 * Take it out of the list
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81 */
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82 dev->d_type = EMPTY;
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83 }
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84
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85 /*
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86 * do_daemons:
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87 * Run all the daemons that are active with the current flag,
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88 * passing the argument to the function.
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89 */
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90 void
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91 do_daemons(int flag)
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92 {
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93 struct delayed_action *dev;
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94
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95 /*
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96 * Loop through the devil list
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97 */
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98 for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
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99 /*
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100 * Executing each one, giving it the proper arguments
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101 */
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102 if (dev->d_type == flag && dev->d_time == DAEMON)
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103 (*dev->d_func)(dev->d_arg);
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104 }
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105
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106 /*
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107 * fuse:
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