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annotate rogue4/list.c @ 82:f11eeafc6568

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srogue: don't store machine-dependent metadata in the savefile. Super-Rogue, like Rogue V4, stored data of machine-dependent length in the savefile, to prevent cheating. This made saved games non-portable. Also deleted was a check that used this data, and prevented restoring savefiles from backup. This change BREAKS SAVEFILE COMPATIBILITY, but old files can be converted by removing the block at offset 0x1e with length sizeof(ino_t) + sizeof(dev_t) + 2 * sizeof(time_t). That seems to be 0x14 on i686 and 0x20 on x86_64.
author John "Elwin" Edwards
date Tue, 06 Aug 2013 19:02:58 -0700
parents 9535a08ddc39
children 1b73a8641b37
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12
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1 /*
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2 * Functions for dealing with linked lists of goodies
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3 *
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4 * @(#)list.c 4.7 (Berkeley) 12/19/81
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include <stdlib.h>
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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 /*
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18 * detach:
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19 * Takes an item out of whatever linked list it might be in
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20 */
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21 _detach(list, item)
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22 register THING **list, *item;
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23 {
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24 if (*list == item)
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25 *list = next(item);
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26 if (prev(item) != NULL) item->l_prev->l_next = next(item);
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27 if (next(item) != NULL) item->l_next->l_prev = prev(item);
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28 item->l_next = NULL;
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29 item->l_prev = NULL;
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30 }
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31
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32 /*
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33 * _attach:
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34 * add an item to the head of a list
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35 */
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36 _attach(list, item)
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37 register THING **list, *item;
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38 {
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39 if (*list != NULL)
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40 {
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41 item->l_next = *list;
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42 (*list)->l_prev = item;
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43 item->l_prev = NULL;
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44 }
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45 else
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46 {
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47 item->l_next = NULL;
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48 item->l_prev = NULL;
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49 }
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50 *list = item;
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51 }
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52
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53 /*
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54 * _free_list:
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55 * Throw the whole blamed thing away
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56 */
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57 _free_list(ptr)
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58 register THING **ptr;
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59 {
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60 register THING *item;
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61
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62 while (*ptr != NULL)
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63 {
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64 item = *ptr;
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65 *ptr = next(item);
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66 discard(item);
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67 }
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68 }
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69
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70 /*
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71 * discard:
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72 * Free up an item
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73 */
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74 discard(item)
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75 register THING *item;
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76 {
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77 total--;
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78 free((char *) item);
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79 }
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80
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81 /*
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82 * new_item
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83 * Get a new item with a specified size
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84 */
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85 THING *
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86 new_item()
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87 {
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88 register THING *item;
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89
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90 if ((item = calloc(1, sizeof *item)) == NULL)
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91 msg("ran out of memory after %d items", total);
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92 else
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93 total++;
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94 item->l_next = item->l_prev = NULL;
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95 return item;
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96 }