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bring a generic interface to CxMap
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include "cx/list.h" |
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30 | |
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31 | #include <string.h> |
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32 | |
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33 | // <editor-fold desc="Store Pointers Functionality"> |
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34 | |
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35 | static _Thread_local cx_compare_func cx_pl_cmpfunc_impl; |
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36 | |
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37 | static int cx_pl_cmpfunc( |
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38 | void const *l, |
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39 | void const *r |
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40 | ) { |
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41 | void *const *lptr = l; |
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42 | void *const *rptr = r; |
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43 | void const *left = lptr == NULL ? NULL : *lptr; |
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44 | void const *right = rptr == NULL ? NULL : *rptr; |
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45 | return cx_pl_cmpfunc_impl(left, right); |
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46 | } |
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47 | |
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48 | static void cx_pl_hack_cmpfunc(struct cx_list_s const *list) { |
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49 | // cast away const - this is the hacky thing |
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50 | struct cx_list_s *l = (struct cx_list_s *) list; |
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51 | cx_pl_cmpfunc_impl = l->cmpfunc; |
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52 | l->cmpfunc = cx_pl_cmpfunc; |
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53 | } |
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54 | |
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55 | static void cx_pl_unhack_cmpfunc(struct cx_list_s const *list) { |
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56 | // cast away const - this is the hacky thing |
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57 | struct cx_list_s *l = (struct cx_list_s *) list; |
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58 | l->cmpfunc = cx_pl_cmpfunc_impl; |
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59 | } |
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60 | |
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61 | static void cx_pl_destructor(struct cx_list_s *list) { |
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62 | list->climpl->destructor(list); |
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63 | } |
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64 | |
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65 | static int cx_pl_insert_element( |
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66 | struct cx_list_s *list, |
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67 | size_t index, |
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68 | void const *element |
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69 | ) { |
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70 | return list->climpl->insert_element(list, index, &element); |
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71 | } |
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72 | |
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73 | static size_t cx_pl_insert_array( |
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74 | struct cx_list_s *list, |
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75 | size_t index, |
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76 | void const *array, |
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77 | size_t n |
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78 | ) { |
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79 | return list->climpl->insert_array(list, index, array, n); |
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80 | } |
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81 | |
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82 | static int cx_pl_insert_iter( |
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83 | struct cx_mut_iterator_s *iter, |
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84 | void const *elem, |
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85 | int prepend |
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86 | ) { |
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87 | struct cx_list_s *list = iter->src_handle; |
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88 | return list->climpl->insert_iter(iter, &elem, prepend); |
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89 | } |
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90 | |
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91 | static int cx_pl_remove( |
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92 | struct cx_list_s *list, |
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93 | size_t index |
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94 | ) { |
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95 | return list->climpl->remove(list, index); |
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96 | } |
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97 | |
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98 | static void cx_pl_clear(struct cx_list_s *list) { |
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99 | list->climpl->clear(list); |
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100 | } |
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101 | |
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102 | static int cx_pl_swap( |
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103 | struct cx_list_s *list, |
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104 | size_t i, |
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105 | size_t j |
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106 | ) { |
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107 | return list->climpl->swap(list, i, j); |
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108 | } |
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109 | |
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110 | static void *cx_pl_at( |
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111 | struct cx_list_s const *list, |
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112 | size_t index |
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113 | ) { |
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114 | void **ptr = list->climpl->at(list, index); |
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115 | return ptr == NULL ? NULL : *ptr; |
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116 | } |
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117 | |
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118 | static size_t cx_pl_find( |
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119 | struct cx_list_s const *list, |
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120 | void const *elem |
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121 | ) { |
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122 | cx_pl_hack_cmpfunc(list); |
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123 | size_t ret = list->climpl->find(list, &elem); |
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124 | cx_pl_unhack_cmpfunc(list); |
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125 | return ret; |
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126 | } |
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127 | |
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128 | static void cx_pl_sort(struct cx_list_s *list) { |
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129 | cx_pl_hack_cmpfunc(list); |
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130 | list->climpl->sort(list); |
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131 | cx_pl_unhack_cmpfunc(list); |
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132 | } |
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133 | |
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134 | static int cx_pl_compare( |
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135 | struct cx_list_s const *list, |
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136 | struct cx_list_s const *other |
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137 | ) { |
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138 | cx_pl_hack_cmpfunc(list); |
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139 | int ret = list->climpl->compare(list, other); |
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140 | cx_pl_unhack_cmpfunc(list); |
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141 | return ret; |
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142 | } |
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143 | |
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144 | static void cx_pl_reverse(struct cx_list_s *list) { |
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145 | list->climpl->reverse(list); |
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146 | } |
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147 | |
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148 | static void *cx_pl_iter_current(void const *it) { |
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149 | struct cx_iterator_s const *iter = it; |
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150 | void **ptr = iter->base.current_impl(it); |
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151 | return ptr == NULL ? NULL : *ptr; |
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152 | } |
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153 | |
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154 | static struct cx_iterator_s cx_pl_iterator( |
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155 | struct cx_list_s const *list, |
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156 | size_t index, |
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157 | bool backwards |
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158 | ) { |
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159 | struct cx_iterator_s iter = list->climpl->iterator(list, index, backwards); |
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160 | iter.base.current_impl = iter.base.current; |
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161 | iter.base.current = cx_pl_iter_current; |
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162 | return iter; |
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163 | } |
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164 | |
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165 | static cx_list_class cx_pointer_list_class = { |
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166 | cx_pl_destructor, |
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167 | cx_pl_insert_element, |
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168 | cx_pl_insert_array, |
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169 | cx_pl_insert_iter, |
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170 | cx_pl_remove, |
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171 | cx_pl_clear, |
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172 | cx_pl_swap, |
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173 | cx_pl_at, |
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174 | cx_pl_find, |
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175 | cx_pl_sort, |
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176 | cx_pl_compare, |
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177 | cx_pl_reverse, |
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178 | cx_pl_iterator, |
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179 | }; |
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180 | |
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181 | void cxListStoreObjects(CxList *list) { |
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182 | list->store_pointer = false; |
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183 | if (list->climpl != NULL) { |
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184 | list->cl = list->climpl; |
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185 | list->climpl = NULL; |
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186 | } |
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187 | } |
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188 | |
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189 | void cxListStorePointers(CxList *list) { |
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190 | list->item_size = sizeof(void *); |
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191 | list->store_pointer = true; |
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192 | list->climpl = list->cl; |
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193 | list->cl = &cx_pointer_list_class; |
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194 | } |
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195 | |
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196 | // </editor-fold> |
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197 | |
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198 | void cxListDestroy(CxList *list) { |
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199 | if (list->simple_destructor) { |
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200 | CxIterator iter = cxListIterator(list); |
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201 | cx_foreach(void*, elem, iter) { |
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202 | // already correctly resolved pointer - immediately invoke dtor |
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203 | list->simple_destructor(elem); |
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204 | } |
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205 | } |
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206 | if (list->advanced_destructor) { |
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207 | CxIterator iter = cxListIterator(list); |
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208 | cx_foreach(void*, elem, iter) { |
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209 | // already correctly resolved pointer - immediately invoke dtor |
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210 | list->advanced_destructor(list->destructor_data, elem); |
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211 | } |
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212 | } |
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213 | |
524 | 214 | list->cl->destructor(list); |
215 | cxFree(list->allocator, list); | |
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216 | } |
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217 | |
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218 | int cxListCompare( |
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219 | CxList const *list, |
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220 | CxList const *other |
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221 | ) { |
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222 | if ((list->store_pointer ^ other->store_pointer) || |
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223 | ((list->climpl == NULL) ^ (other->climpl != NULL)) || |
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224 | ((list->climpl != NULL ? list->climpl->compare : list->cl->compare) != |
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225 | (other->climpl != NULL ? other->climpl->compare : other->cl->compare))) { |
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226 | // lists are definitely different - cannot use internal compare function |
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227 | if (list->size == other->size) { |
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228 | CxIterator left = cxListIterator(list); |
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229 | CxIterator right = cxListIterator(other); |
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230 | for (size_t i = 0; i < list->size; i++) { |
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231 | void *leftValue = cxIteratorCurrent(left); |
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232 | void *rightValue = cxIteratorCurrent(right); |
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233 | int d = list->cmpfunc(leftValue, rightValue); |
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234 | if (d != 0) { |
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235 | return d; |
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236 | } |
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237 | cxIteratorNext(left); |
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238 | cxIteratorNext(right); |
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239 | } |
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240 | return 0; |
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241 | } else { |
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242 | return list->size < other->size ? -1 : 1; |
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243 | } |
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244 | } else { |
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245 | // lists are compatible |
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246 | return list->cl->compare(list, other); |
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247 | } |
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248 | } |
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249 | |
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250 | CxMutIterator cxListMutIteratorAt( |
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251 | CxList *list, |
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252 | size_t index |
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253 | ) { |
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254 | CxIterator it = list->cl->iterator(list, index, false); |
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255 | it.base.mutating = true; |
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256 | |
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257 | // we know the iterators share the same memory layout |
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258 | CxMutIterator iter; |
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259 | memcpy(&iter, &it, sizeof(CxMutIterator)); |
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260 | return iter; |
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261 | } |
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262 | |
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263 | CxMutIterator cxListMutBackwardsIteratorAt( |
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264 | CxList *list, |
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265 | size_t index |
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266 | ) { |
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267 | CxIterator it = list->cl->iterator(list, index, true); |
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268 | it.base.mutating = true; |
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269 | |
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270 | // we know the iterators share the same memory layout |
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271 | CxMutIterator iter; |
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272 | memcpy(&iter, &it, sizeof(CxMutIterator)); |
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273 | return iter; |
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274 | } |