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annotate srogue/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 2128c7dc8a40
children d6b7c3fb37ea
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36
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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 9.0 (rdk) 7/17/84
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5 *
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6 * Super-Rogue
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7 * Copyright (C) 1984 Robert D. Kindelberger
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include <stdlib.h>
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18 #include "rogue.h"
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19 #include "rogue.ext"
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20
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21 /*
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22 * detach:
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23 * Takes an item out of whatever linked list it might be in
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24 */
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25
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26 _detach(list, item)
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27 struct linked_list **list, *item;
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28 {
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29 if (*list == item)
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30 *list = next(item);
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31 if (prev(item) != NULL)
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32 item->l_prev->l_next = next(item);
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33 if (next(item) != NULL)
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34 item->l_next->l_prev = prev(item);
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35 item->l_next = NULL;
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36 item->l_prev = NULL;
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37 }
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38
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39 /*
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40 * _attach: add an item to the head of a list
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41 */
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42 _attach(list, item)
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43 struct linked_list **list, *item;
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44 {
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45 if (*list != NULL) {
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46 item->l_next = *list;
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47 (*list)->l_prev = item;
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48 item->l_prev = NULL;
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49 }
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50 else {
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51 item->l_next = NULL;
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52 item->l_prev = NULL;
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53 }
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54 *list = item;
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55 }
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56
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57 /*
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58 * _free_list: Throw the whole blamed thing away
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59 */
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60 _free_list(ptr)
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61 struct linked_list **ptr;
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62 {
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63 register struct linked_list *item;
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64
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65 while (*ptr != NULL) {
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66 item = *ptr;
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67 *ptr = next(item);
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68 discard(item);
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69 }
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70 }
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71
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72 /*
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73 * discard: free up an item
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74 */
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75 discard(item)
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76 struct linked_list *item;
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77 {
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78 total -= 2;
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79 FREE(item->l_data);
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80 FREE(item);
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81 }
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82
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83 /*
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84 * new_item: get a new item with a specified size
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85 */
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86 struct linked_list *
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87 new_item(size)
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88 int size;
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89 {
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90 register struct linked_list *item;
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91
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92 item = (struct linked_list *) new(sizeof *item);
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93 item->l_data = new(size);
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94 item->l_next = item->l_prev = NULL;
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95 return item;
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96 }
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97
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98 char *
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99 new(size)
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100 int size;
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101 {
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102 register char *space = ALLOC(size);
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103
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104 if (space == NULL) {
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105 sprintf(prbuf,"Rogue ran out of memory (%d).",sbrk(0));
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106 fatal(prbuf);
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107 }
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