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annotate arogue5/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 a5433ba4cabf
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1 /*
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2 * Contains functions for dealing with things that happen in the future.
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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 "rogue.h"
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17
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18 #define EMPTY 0
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19 #define DAEMON -1
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20
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21 #define _X_ { EMPTY }
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22
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23 struct delayed_action d_list[MAXDAEMONS] = {
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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 struct delayed_action f_list[MAXFUSES] = {
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27 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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28 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_
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29 };
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30 int demoncnt = 0; /* number of active daemons */
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31 int fusecnt = 0;
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32
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33
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34 /*
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35 * d_slot:
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36 * Find an empty slot in the daemon list
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37 */
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38 struct delayed_action *
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39 d_slot()
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40 {
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41 reg int i;
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42 reg struct delayed_action *dev;
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43
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44 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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45 if (dev->d_type == EMPTY)
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46 return dev;
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47 return NULL;
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48 }
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49
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50 /*
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51 * f_slot:
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52 * Find an empty slot in the fuses list
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53 */
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54 struct delayed_action *
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55 f_slot()
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56 {
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57 reg int i;
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58 reg struct delayed_action *dev;
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59
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60 for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
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61 if (dev->d_type == EMPTY)
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62 return dev;
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63 return NULL;
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64 }
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65
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66
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67
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68 /*
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69 * find_slot:
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70 * Find a particular slot in the table
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71 */
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72 struct delayed_action *
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73 find_slot(func)
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74 reg int (*func)();
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75 {
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76 reg int i;
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77 reg struct delayed_action *dev;
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78
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79 for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
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80 if (dev->d_type != EMPTY && func == dev->d_func)
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81 return dev;
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82 return NULL;
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83 }
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84
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85
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86 /*
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87 * start_daemon:
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88 * Start a daemon, takes a function.
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89 */
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90 start_daemon(func, arg, type)
63
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91 reg int arg, type, (*func)();
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92 {
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93 reg struct delayed_action *dev;
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94
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95 dev = d_slot();
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96 if (dev != NULL) {
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97 dev->d_type = type;
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98 dev->d_func = func;
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99 dev->d_arg = arg;
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100 dev->d_time = DAEMON;
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101 demoncnt += 1; /* update count */
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102 }
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103 }
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104
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