Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/include/prclist.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #ifndef prclist_h___
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7 #define prclist_h___
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8
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9 #include "prtypes.h"
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10
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11 typedef struct PRCListStr PRCList;
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12
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13 /*
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14 ** Circular linked list
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15 */
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16 struct PRCListStr {
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17 PRCList *next;
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18 PRCList *prev;
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19 };
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20
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21 /*
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22 ** Insert element "_e" into the list, before "_l".
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23 */
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24 #define PR_INSERT_BEFORE(_e,_l) \
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25 PR_BEGIN_MACRO \
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26 (_e)->next = (_l); \
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27 (_e)->prev = (_l)->prev; \
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28 (_l)->prev->next = (_e); \
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29 (_l)->prev = (_e); \
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30 PR_END_MACRO
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31
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32 /*
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33 ** Insert element "_e" into the list, after "_l".
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34 */
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35 #define PR_INSERT_AFTER(_e,_l) \
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36 PR_BEGIN_MACRO \
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37 (_e)->next = (_l)->next; \
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38 (_e)->prev = (_l); \
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39 (_l)->next->prev = (_e); \
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40 (_l)->next = (_e); \
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41 PR_END_MACRO
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42
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43 /*
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44 ** Return the element following element "_e"
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45 */
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46 #define PR_NEXT_LINK(_e) \
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47 ((_e)->next)
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48 /*
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49 ** Return the element preceding element "_e"
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50 */
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51 #define PR_PREV_LINK(_e) \
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52 ((_e)->prev)
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53
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54 /*
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55 ** Append an element "_e" to the end of the list "_l"
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56 */
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57 #define PR_APPEND_LINK(_e,_l) PR_INSERT_BEFORE(_e,_l)
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58
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59 /*
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60 ** Insert an element "_e" at the head of the list "_l"
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61 */
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62 #define PR_INSERT_LINK(_e,_l) PR_INSERT_AFTER(_e,_l)
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63
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64 /* Return the head/tail of the list */
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65 #define PR_LIST_HEAD(_l) (_l)->next
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66 #define PR_LIST_TAIL(_l) (_l)->prev
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67
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68 /*
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69 ** Remove the element "_e" from it's circular list.
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70 */
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71 #define PR_REMOVE_LINK(_e) \
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72 PR_BEGIN_MACRO \
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73 (_e)->prev->next = (_e)->next; \
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74 (_e)->next->prev = (_e)->prev; \
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75 PR_END_MACRO
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76
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77 /*
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78 ** Remove the element "_e" from it's circular list. Also initializes the
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79 ** linkage.
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80 */
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81 #define PR_REMOVE_AND_INIT_LINK(_e) \
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82 PR_BEGIN_MACRO \
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83 (_e)->prev->next = (_e)->next; \
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84 (_e)->next->prev = (_e)->prev; \
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85 (_e)->next = (_e); \
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86 (_e)->prev = (_e); \
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87 PR_END_MACRO
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88
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89 /*
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90 ** Return non-zero if the given circular list "_l" is empty, zero if the
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91 ** circular list is not empty
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92 */
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93 #define PR_CLIST_IS_EMPTY(_l) \
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94 ((_l)->next == (_l))
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95
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96 /*
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97 ** Initialize a circular list
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98 */
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99 #define PR_INIT_CLIST(_l) \
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100 PR_BEGIN_MACRO \
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101 (_l)->next = (_l); \
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102 (_l)->prev = (_l); \
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103 PR_END_MACRO
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104
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105 #define PR_INIT_STATIC_CLIST(_l) \
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106 {(_l), (_l)}
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107
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108 #endif /* prclist_h___ */
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