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annotate rogue4/daemon.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 f2951c4e28d9
children 1b73a8641b37
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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 4.4 (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 <curses.h>
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15 #include "rogue.h"
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16
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17 #define EMPTY 0
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18 #define DAEMON -1
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19
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20 #define _X_ { EMPTY }
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21
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22 struct delayed_action d_list[MAXDAEMONS] = {
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23 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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24 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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25 };
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26
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27 /*
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28 * d_slot:
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29 * Find an empty slot in the daemon/fuse list
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30 */
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31 struct delayed_action *
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32 d_slot()
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33 {
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34 register int i;
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35 register struct delayed_action *dev;
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36
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37 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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38 if (dev->d_type == EMPTY)
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39 return dev;
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40 #ifdef WIZARD
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41 debug("Ran out of fuse slots");
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42 #endif
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43 return NULL;
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44 }
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45
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46 /*
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47 * find_slot:
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48 * Find a particular slot in the table
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49 */
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50 struct delayed_action *
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51 find_slot(func)
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52 register int (*func)();
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53 {
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54 register int i;
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55 register struct delayed_action *dev;
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56
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57 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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58 if (dev->d_type != EMPTY && func == dev->d_func)
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59 return dev;
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60 return NULL;
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61 }
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62
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63 /*
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64 * start_daemon:
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65 * Start a daemon, takes a function.
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66 */
107
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67 start_daemon(func, arg, type)
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68 int (*func)(), arg, type;
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69 {
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70 register struct delayed_action *dev;
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71
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72 dev = d_slot();
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73 dev->d_type = type;
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74 dev->d_func = func;
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75 dev->d_arg = arg;
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76 dev->d_time = DAEMON;
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77 }
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78
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79 /*
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80 * kill_daemon:
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81 * Remove a daemon from the list
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82 */
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83 kill_daemon(func)
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84 int (*func)();
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85 {
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86 register struct delayed_action *dev;
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87
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88 if ((dev = find_slot(func)) == NULL)
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89 return;
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90 /*
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91 * Take it out of the list
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92 */
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93 dev->d_type = EMPTY;
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94 }
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95
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96 /*
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97 * do_daemons:
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98 * Run all the daemons that are active with the current flag,
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99 * passing the argument to the function.
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100 */
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101 do_daemons(flag)
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102 register int flag;
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103 {
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104 register struct delayed_action *dev;
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