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#216 test hashing functions
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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/linked_list.h" |
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30 | #include "cx/utils.h" |
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31 | #include <stdint.h> |
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32 | #include <string.h> |
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33 | #include <assert.h> |
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34 | |
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35 | /* LOW LEVEL LINKED LIST FUNCTIONS */ |
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36 | |
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37 | #define CX_LL_PTR(cur, off) (*(void**)(((char*)(cur))+(off))) |
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38 | #define ll_prev(node) CX_LL_PTR(node, loc_prev) |
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39 | #define ll_next(node) CX_LL_PTR(node, loc_next) |
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40 | #define ll_advance(node) CX_LL_PTR(node, loc_advance) |
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41 | #define ll_data_f(node, follow_ptr) ((follow_ptr)?CX_LL_PTR(node, loc_data):(((char*)(node))+loc_data)) |
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42 | #define ll_data(node) ll_data_f(node,follow_ptr) |
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43 | |
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44 | void *cx_linked_list_at( |
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45 | void const *start, |
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46 | size_t start_index, |
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47 | ptrdiff_t loc_advance, |
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48 | size_t index |
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49 | ) { |
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50 | assert(start != NULL); |
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51 | assert(loc_advance >= 0); |
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52 | size_t i = start_index; |
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53 | void const *cur = start; |
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54 | while (i != index && cur != NULL) { |
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55 | cur = ll_advance(cur); |
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56 | i < index ? i++ : i--; |
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57 | } |
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58 | return (void *) cur; |
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59 | } |
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60 | |
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61 | size_t cx_linked_list_find( |
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62 | void const *start, |
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63 | ptrdiff_t loc_advance, |
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64 | ptrdiff_t loc_data, |
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65 | bool follow_ptr, |
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66 | CxListComparator cmp_func, |
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67 | void const *elem |
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68 | ) { |
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69 | assert(start != NULL); |
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70 | assert(loc_advance >= 0); |
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71 | assert(loc_data >= 0); |
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72 | assert(cmp_func); |
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73 | |
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74 | void const *node = start; |
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75 | size_t index = 0; |
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76 | do { |
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77 | void *current = ll_data(node); |
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78 | if (cmp_func(current, elem) == 0) { |
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79 | return index; |
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80 | } |
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81 | node = ll_advance(node); |
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82 | index++; |
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83 | } while (node != NULL); |
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84 | return index; |
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85 | } |
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86 | |
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87 | void *cx_linked_list_first( |
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88 | void const *node, |
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89 | ptrdiff_t loc_prev |
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90 | ) { |
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91 | return cx_linked_list_last(node, loc_prev); |
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92 | } |
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93 | |
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94 | void *cx_linked_list_last( |
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95 | void const *node, |
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96 | ptrdiff_t loc_next |
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97 | ) { |
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98 | assert(node != NULL); |
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99 | assert(loc_next >= 0); |
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100 | |
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101 | void const *cur = node; |
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102 | void const *last; |
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103 | do { |
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104 | last = cur; |
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105 | } while ((cur = ll_next(cur)) != NULL); |
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106 | |
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107 | return (void *) last; |
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108 | } |
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109 | |
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110 | void *cx_linked_list_prev( |
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111 | void const *begin, |
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112 | ptrdiff_t loc_next, |
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113 | void const *node |
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114 | ) { |
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115 | assert(begin != NULL); |
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116 | assert(node != NULL); |
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117 | assert(loc_next >= 0); |
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118 | if (begin == node) return NULL; |
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119 | void const *cur = begin; |
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120 | void const *next; |
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121 | while (1) { |
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122 | next = ll_next(cur); |
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123 | if (next == node) return (void *) cur; |
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124 | cur = next; |
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125 | } |
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126 | } |
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127 | |
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128 | void cx_linked_list_link( |
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129 | void *left, |
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130 | void *right, |
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131 | ptrdiff_t loc_prev, |
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132 | ptrdiff_t loc_next |
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133 | ) { |
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134 | assert(loc_next >= 0); |
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135 | ll_next(left) = right; |
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136 | if (loc_prev >= 0) { |
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137 | ll_prev(right) = left; |
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138 | } |
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139 | } |
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140 | |
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141 | void cx_linked_list_unlink( |
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142 | void *left, |
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143 | void *right, |
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144 | ptrdiff_t loc_prev, |
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145 | ptrdiff_t loc_next |
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146 | ) { |
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147 | assert (loc_next >= 0); |
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148 | assert(ll_next(left) == right); |
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149 | ll_next(left) = NULL; |
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150 | if (loc_prev >= 0) { |
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151 | assert(ll_prev(right) == left); |
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152 | ll_prev(right) = NULL; |
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153 | } |
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154 | } |
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155 | |
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156 | void cx_linked_list_add( |
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157 | void **begin, |
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158 | void **end, |
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159 | ptrdiff_t loc_prev, |
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160 | ptrdiff_t loc_next, |
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161 | void *new_node |
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162 | ) { |
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163 | void *last; |
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164 | if (end == NULL) { |
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165 | assert(begin != NULL); |
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166 | last = *begin == NULL ? NULL : cx_linked_list_last(*begin, loc_next); |
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167 | } else { |
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168 | last = *end; |
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169 | } |
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170 | cx_linked_list_insert_chain(begin, end, loc_prev, loc_next, last, new_node, new_node); |
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171 | } |
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172 | |
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173 | void cx_linked_list_prepend( |
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174 | void **begin, |
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175 | void **end, |
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176 | ptrdiff_t loc_prev, |
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177 | ptrdiff_t loc_next, |
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178 | void *new_node |
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179 | ) { |
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180 | cx_linked_list_insert_chain(begin, end, loc_prev, loc_next, NULL, new_node, new_node); |
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181 | } |
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182 | |
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183 | void cx_linked_list_insert( |
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184 | void **begin, |
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185 | void **end, |
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186 | ptrdiff_t loc_prev, |
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187 | ptrdiff_t loc_next, |
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188 | void *node, |
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189 | void *new_node |
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190 | ) { |
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191 | cx_linked_list_insert_chain(begin, end, loc_prev, loc_next, node, new_node, new_node); |
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192 | } |
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193 | |
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194 | void cx_linked_list_insert_chain( |
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195 | void **begin, |
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196 | void **end, |
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197 | ptrdiff_t loc_prev, |
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198 | ptrdiff_t loc_next, |
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199 | void *node, |
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200 | void *insert_begin, |
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201 | void *insert_end |
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202 | ) { |
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203 | // find the end of the chain, if not specified |
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204 | if (insert_end == NULL) { |
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205 | insert_end = cx_linked_list_last(insert_begin, loc_next); |
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206 | } |
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207 | |
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208 | // determine the successor |
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209 | void *successor; |
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210 | if (node == NULL) { |
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211 | assert(begin != NULL || (end != NULL && loc_prev >= 0)); |
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212 | if (begin != NULL) { |
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213 | successor = *begin; |
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214 | *begin = insert_begin; |
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215 | } else { |
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216 | successor = *end == NULL ? NULL : cx_linked_list_first(*end, loc_prev); |
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217 | } |
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218 | } else { |
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219 | successor = ll_next(node); |
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220 | cx_linked_list_link(node, insert_begin, loc_prev, loc_next); |
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221 | } |
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222 | |
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223 | if (successor == NULL) { |
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224 | // the list ends with the new chain |
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225 | if (end != NULL) { |
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226 | *end = insert_end; |
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227 | } |
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228 | } else { |
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229 | cx_linked_list_link(insert_end, successor, loc_prev, loc_next); |
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230 | } |
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231 | } |
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232 | |
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233 | void cx_linked_list_remove( |
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234 | void **begin, |
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235 | void **end, |
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236 | ptrdiff_t loc_prev, |
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237 | ptrdiff_t loc_next, |
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238 | void *node |
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239 | ) { |
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240 | assert(node != NULL); |
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241 | assert(loc_next >= 0); |
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242 | assert(loc_prev >= 0 || begin != NULL); |
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243 | |
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244 | // find adjacent nodes |
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245 | void *next = ll_next(node); |
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246 | void *prev; |
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247 | if (loc_prev >= 0) { |
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248 | prev = ll_prev(node); |
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249 | } else { |
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250 | prev = cx_linked_list_prev(*begin, loc_next, node); |
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251 | } |
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252 | |
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253 | // update next pointer of prev node, or set begin |
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254 | if (prev == NULL) { |
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255 | if (begin != NULL) { |
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256 | *begin = next; |
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257 | } |
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258 | } else { |
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259 | ll_next(prev) = next; |
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260 | } |
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261 | |
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262 | // update prev pointer of next node, or set end |
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263 | if (next == NULL) { |
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264 | if (end != NULL) { |
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265 | *end = prev; |
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266 | } |
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267 | } else if (loc_prev >= 0) { |
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268 | ll_prev(next) = prev; |
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269 | } |
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270 | } |
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271 | |
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272 | size_t cx_linked_list_size( |
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273 | void const *node, |
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274 | ptrdiff_t loc_next |
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275 | ) { |
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276 | assert(loc_next >= 0); |
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277 | size_t size = 0; |
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278 | while (node != NULL) { |
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279 | node = ll_next(node); |
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280 | size++; |
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281 | } |
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282 | return size; |
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283 | } |
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284 | |
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285 | static void *cx_linked_list_sort_merge( |
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286 | ptrdiff_t loc_prev, |
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287 | ptrdiff_t loc_next, |
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288 | ptrdiff_t loc_data, |
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289 | bool follow_ptr, |
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290 | size_t length, |
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291 | void *ls, |
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292 | void *le, |
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293 | void *re, |
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294 | CxListComparator cmp_func |
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295 | ) { |
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296 | const size_t sbo_len = 1024; |
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297 | void *sbo[sbo_len]; |
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298 | void **sorted = (length >= sbo_len) ? malloc(sizeof(void *) * length) : sbo; |
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299 | if (sorted == NULL) abort(); |
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300 | void *rc, *lc; |
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301 | |
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302 | lc = ls; |
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303 | rc = le; |
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304 | size_t n = 0; |
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305 | while (lc && lc != le && rc != re) { |
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306 | if (cmp_func(ll_data(lc), ll_data(rc)) <= 0) { |
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307 | sorted[n] = lc; |
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308 | lc = ll_next(lc); |
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309 | } else { |
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310 | sorted[n] = rc; |
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311 | rc = ll_next(rc); |
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312 | } |
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313 | n++; |
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314 | } |
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315 | while (lc && lc != le) { |
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316 | sorted[n] = lc; |
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317 | lc = ll_next(lc); |
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318 | n++; |
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319 | } |
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320 | while (rc && rc != re) { |
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321 | sorted[n] = rc; |
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322 | rc = ll_next(rc); |
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323 | n++; |
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324 | } |
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325 | |
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326 | // Update pointer |
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327 | if (loc_prev >= 0) ll_prev(sorted[0]) = NULL; |
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328 | cx_for_n (i, length - 1) { |
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329 | cx_linked_list_link(sorted[i], sorted[i + 1], loc_prev, loc_next); |
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330 | } |
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331 | ll_next(sorted[length - 1]) = NULL; |
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332 | |
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333 | void *ret = sorted[0]; |
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334 | if (sorted != sbo) { |
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335 | free(sorted); |
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336 | } |
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337 | return ret; |
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338 | } |
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339 | |
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340 | void cx_linked_list_sort( /* NOLINT(misc-no-recursion) - purposely recursive function */ |
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341 | void **begin, |
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342 | void **end, |
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343 | ptrdiff_t loc_prev, |
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344 | ptrdiff_t loc_next, |
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345 | ptrdiff_t loc_data, |
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346 | bool follow_ptr, |
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347 | CxListComparator cmp_func |
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348 | ) { |
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349 | assert(begin != NULL); |
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350 | assert(loc_next >= 0); |
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351 | assert(loc_data >= 0); |
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352 | assert(cmp_func); |
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353 | |
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354 | void *lc, *ls, *le, *re; |
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355 | |
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356 | // set start node |
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357 | ls = *begin; |
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358 | |
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359 | // check how many elements are already sorted |
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360 | lc = ls; |
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361 | size_t ln = 1; |
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362 | while (ll_next(lc) != NULL && cmp_func(ll_data(ll_next(lc)), ll_data(lc)) > 0) { |
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363 | lc = ll_next(lc); |
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364 | ln++; |
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365 | } |
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366 | le = ll_next(lc); |
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367 | |
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368 | // if first unsorted node is NULL, the list is already completely sorted |
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369 | if (le != NULL) { |
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370 | void *rc; |
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371 | size_t rn = 1; |
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372 | rc = le; |
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373 | // skip already sorted elements |
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374 | while (ll_next(rc) != NULL && cmp_func(ll_data(ll_next(rc)), ll_data(rc)) > 0) { |
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375 | rc = ll_next(rc); |
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376 | rn++; |
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377 | } |
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378 | re = ll_next(rc); |
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379 | |
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380 | // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them |
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381 | void *sorted = cx_linked_list_sort_merge(loc_prev, loc_next, loc_data, follow_ptr, |
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382 | ln + rn, ls, le, re, cmp_func); |
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383 | |
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384 | // Something left? Sort it! |
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385 | size_t remainder_length = cx_linked_list_size(re, loc_next); |
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386 | if (remainder_length > 0) { |
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387 | void *remainder = re; |
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388 | cx_linked_list_sort(&remainder, NULL, loc_prev, loc_next, loc_data, follow_ptr, cmp_func); |
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389 | |
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390 | // merge sorted list with (also sorted) remainder |
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391 | *begin = cx_linked_list_sort_merge(loc_prev, loc_next, loc_data, follow_ptr, |
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392 | ln + rn + remainder_length, |
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393 | sorted, remainder, NULL, cmp_func); |
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394 | } else { |
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395 | // no remainder - we've got our sorted list |
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396 | *begin = sorted; |
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397 | } |
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398 | if (end) *end = cx_linked_list_last(sorted, loc_next); |
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399 | } |
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400 | } |
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401 | |
486
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402 | int cx_linked_list_compare( |
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403 | void const *begin_left, |
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404 | void const *begin_right, |
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405 | ptrdiff_t loc_advance, |
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406 | ptrdiff_t loc_data, |
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407 | bool follow_ptr_left, |
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408 | bool follow_ptr_right, |
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409 | CxListComparator cmp_func |
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410 | ) { |
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411 | void const *left = begin_left, *right = begin_right; |
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412 | |
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413 | while (left != NULL && right != NULL) { |
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414 | void const *left_data = ll_data_f(left, follow_ptr_left); |
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415 | void const *right_data = ll_data_f(right, follow_ptr_right); |
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416 | int result = cmp_func(left_data, right_data); |
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417 | if (result != 0) return result; |
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418 | left = ll_advance(left); |
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419 | right = ll_advance(right); |
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420 | } |
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421 | |
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422 | if (left != NULL) { return 1; } |
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423 | else if (right != NULL) { return -1; } |
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424 | else { return 0; } |
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425 | } |
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426 | |
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427 | void cx_linked_list_reverse( |
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428 | void **begin, |
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429 | void **end, |
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430 | ptrdiff_t loc_prev, |
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431 | ptrdiff_t loc_next |
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432 | ) { |
473
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433 | assert(begin != NULL); |
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434 | assert(loc_next >= 0); |
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435 | |
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436 | // swap all links |
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437 | void *prev = NULL; |
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438 | void *cur = *begin; |
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439 | while (cur != NULL) { |
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440 | void *next = ll_next(cur); |
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441 | |
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442 | ll_next(cur) = prev; |
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443 | if (loc_prev >= 0) { |
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444 | ll_prev(cur) = next; |
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445 | } |
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446 | |
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447 | prev = cur; |
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448 | cur = next; |
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449 | } |
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450 | |
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451 | // update begin and end |
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452 | if (end != NULL) { |
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453 | *end = *begin; |
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454 | } |
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455 | *begin = prev; |
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456 | } |
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457 | |
398
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458 | /* HIGH LEVEL LINKED LIST IMPLEMENTATION */ |
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459 | |
447
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460 | typedef struct cx_linked_list_node cx_linked_list_node; |
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461 | struct cx_linked_list_node { |
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462 | cx_linked_list_node *prev; |
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463 | cx_linked_list_node *next; |
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464 | char payload[]; |
447
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465 | }; |
402
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466 | |
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467 | #define CX_LL_LOC_PREV offsetof(cx_linked_list_node, prev) |
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468 | #define CX_LL_LOC_NEXT offsetof(cx_linked_list_node, next) |
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469 | #define CX_LL_LOC_DATA offsetof(cx_linked_list_node, payload) |
439
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470 | |
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471 | typedef struct { |
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472 | struct cx_list_s base; |
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473 | cx_linked_list_node *begin; |
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474 | cx_linked_list_node *end; |
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475 | bool follow_ptr; |
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476 | } cx_linked_list; |
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477 | |
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478 | static cx_linked_list_node *cx_ll_node_at( |
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479 | cx_linked_list const *list, |
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480 | size_t index |
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481 | ) { |
447
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482 | if (index >= list->base.size) { |
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483 | return NULL; |
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484 | } else if (index > list->base.size / 2) { |
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485 | return cx_linked_list_at(list->end, list->base.size - 1, CX_LL_LOC_PREV, index); |
447
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486 | } else { |
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487 | return cx_linked_list_at(list->begin, 0, CX_LL_LOC_NEXT, index); |
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488 | } |
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489 | } |
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490 | |
499
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491 | static int cx_ll_insert_at( |
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492 | struct cx_list_s *list, |
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493 | cx_linked_list_node *node, |
489
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494 | void const *elem |
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495 | ) { |
448
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496 | |
481
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497 | // create the new new_node |
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498 | cx_linked_list_node *new_node = cxMalloc(list->allocator, |
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499 | sizeof(cx_linked_list_node) + list->itemsize); |
448
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500 | |
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501 | // sortir if failed |
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502 | if (new_node == NULL) return 1; |
448
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503 | |
481
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504 | // initialize new new_node |
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505 | new_node->prev = new_node->next = NULL; |
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506 | memcpy(new_node->payload, elem, list->itemsize); |
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507 | |
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508 | // insert |
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509 | cx_linked_list *ll = (cx_linked_list *) list; |
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510 | cx_linked_list_insert_chain( |
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511 | (void **) &ll->begin, (void **) &ll->end, |
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512 | CX_LL_LOC_PREV, CX_LL_LOC_NEXT, |
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513 | node, new_node, new_node |
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514 | ); |
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515 | |
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516 | // increase the size and return |
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517 | list->size++; |
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518 | return 0; |
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519 | } |
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520 | |
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521 | static int cx_ll_insert( |
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522 | struct cx_list_s *list, |
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523 | size_t index, |
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524 | void const *elem |
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525 | ) { |
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526 | // out-of bounds check |
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527 | if (index > list->size) return 1; |
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528 | |
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529 | // find position efficiently |
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530 | cx_linked_list_node *node = index == 0 ? NULL : cx_ll_node_at((cx_linked_list *) list, index - 1); |
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531 | |
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532 | // perform insert |
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533 | return cx_ll_insert_at(list, node, elem); |
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534 | } |
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535 | |
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536 | static int cx_ll_add( |
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537 | struct cx_list_s *list, |
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538 | void const *elem |
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539 | ) { |
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540 | return cx_ll_insert(list, list->size, elem); |
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541 | } |
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542 | |
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543 | static int cx_pll_insert( |
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544 | struct cx_list_s *list, |
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545 | size_t index, |
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546 | void const *elem |
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547 | ) { |
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548 | return cx_ll_insert(list, index, &elem); |
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549 | } |
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550 | |
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551 | static int cx_pll_add( |
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552 | struct cx_list_s *list, |
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553 | void const *elem |
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554 | ) { |
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555 | return cx_ll_insert(list, list->size, &elem); |
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556 | } |
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557 | |
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558 | static int cx_ll_remove( |
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559 | struct cx_list_s *list, |
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560 | size_t index |
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561 | ) { |
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562 | cx_linked_list *ll = (cx_linked_list *) list; |
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563 | cx_linked_list_node *node = cx_ll_node_at(ll, index); |
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564 | |
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565 | // out-of-bounds check |
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566 | if (node == NULL) return 1; |
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567 | |
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568 | // remove |
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569 | cx_linked_list_remove((void **) &ll->begin, (void **) &ll->end, |
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570 | CX_LL_LOC_PREV, CX_LL_LOC_NEXT, node); |
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571 | |
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572 | // adjust size |
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573 | list->size--; |
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574 | |
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575 | // free and return |
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576 | cxFree(list->allocator, node); |
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577 | |
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578 | return 0; |
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579 | } |
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580 | |
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581 | static void *cx_ll_at( |
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582 | struct cx_list_s const *list, |
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583 | size_t index |
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584 | ) { |
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585 | cx_linked_list *ll = (cx_linked_list *) list; |
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586 | cx_linked_list_node *node = cx_ll_node_at(ll, index); |
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587 | return node == NULL ? NULL : node->payload; |
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588 | } |
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589 | |
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590 | static void *cx_pll_at( |
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591 | struct cx_list_s const *list, |
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592 | size_t index |
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593 | ) { |
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594 | cx_linked_list *ll = (cx_linked_list *) list; |
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595 | cx_linked_list_node *node = cx_ll_node_at(ll, index); |
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596 | return node == NULL ? NULL : *(void **) node->payload; |
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597 | } |
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598 | |
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599 | static size_t cx_ll_find( |
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600 | struct cx_list_s const *list, |
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601 | void const *elem |
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602 | ) { |
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603 | cx_linked_list *ll = (cx_linked_list *) list; |
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604 | return cx_linked_list_find(((cx_linked_list *) list)->begin, |
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605 | CX_LL_LOC_NEXT, CX_LL_LOC_DATA, |
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606 | ll->follow_ptr, list->cmpfunc, elem); |
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607 | } |
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608 | |
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609 | static void cx_ll_sort(struct cx_list_s *list) { |
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610 | cx_linked_list *ll = (cx_linked_list *) list; |
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611 | cx_linked_list_sort((void **) &ll->begin, (void **) &ll->end, |
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612 | CX_LL_LOC_PREV, CX_LL_LOC_NEXT, CX_LL_LOC_DATA, |
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613 | ll->follow_ptr, list->cmpfunc); |
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614 | } |
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615 | |
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616 | static void cx_ll_reverse(struct cx_list_s *list) { |
490 | 617 | cx_linked_list *ll = (cx_linked_list *) list; |
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618 | cx_linked_list_reverse((void **) &ll->begin, (void **) &ll->end, CX_LL_LOC_PREV, CX_LL_LOC_NEXT); |
490 | 619 | } |
620 | ||
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621 | static int cx_ll_compare( |
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622 | struct cx_list_s const *list, |
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623 | struct cx_list_s const *other |
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624 | ) { |
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625 | cx_linked_list *left = (cx_linked_list *) list; |
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626 | cx_linked_list *right = (cx_linked_list *) other; |
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627 | return cx_linked_list_compare(left->begin, right->begin, |
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628 | CX_LL_LOC_NEXT, CX_LL_LOC_DATA, |
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629 | left->follow_ptr, right->follow_ptr, list->cmpfunc); |
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630 | } |
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631 | |
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632 | static bool cx_ll_iter_valid(CxIterator const *iter) { |
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633 | return iter->elem_handle != NULL; |
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634 | } |
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635 | |
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636 | static void cx_ll_iter_next(CxIterator *iter) { |
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637 | if (iter->remove) { |
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638 | iter->remove = false; |
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639 | cx_linked_list *ll = iter->src_handle; |
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640 | cx_linked_list_node *node = iter->elem_handle; |
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641 | iter->elem_handle = node->next; |
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642 | cx_linked_list_remove((void **) &ll->begin, (void **) &ll->end, |
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643 | CX_LL_LOC_PREV, CX_LL_LOC_NEXT, node); |
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644 | ll->base.size--; |
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645 | cxFree(ll->base.allocator, node); |
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646 | } else { |
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647 | iter->index++; |
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648 | cx_linked_list_node *node = iter->elem_handle; |
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649 | iter->elem_handle = node->next; |
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650 | } |
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651 | } |
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652 | |
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653 | static void *cx_ll_iter_current(CxIterator const *iter) { |
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654 | cx_linked_list_node *node = iter->elem_handle; |
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655 | return node->payload; |
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656 | } |
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657 | |
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658 | static void *cx_pll_iter_current(CxIterator const *iter) { |
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659 | cx_linked_list_node *node = iter->elem_handle; |
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660 | return *(void **) node->payload; |
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661 | } |
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662 | |
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663 | static CxIterator cx_ll_iterator( |
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664 | struct cx_list_s *list, |
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665 | size_t index |
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666 | ) { |
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667 | CxIterator iter; |
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668 | iter.index = index; |
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669 | iter.src_handle = list; |
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670 | iter.elem_handle = cx_ll_node_at((cx_linked_list const *) list, index); |
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671 | iter.valid = cx_ll_iter_valid; |
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672 | iter.current = cx_ll_iter_current; |
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673 | iter.next = cx_ll_iter_next; |
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674 | iter.remove = false; |
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675 | return iter; |
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676 | } |
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677 | |
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678 | static CxIterator cx_pll_iterator( |
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679 | struct cx_list_s *list, |
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680 | size_t index |
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681 | ) { |
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682 | CxIterator iter = cx_ll_iterator(list, index); |
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683 | iter.current = cx_pll_iter_current; |
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684 | return iter; |
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685 | } |
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686 | |
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687 | static int cx_ll_insert_iter( |
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688 | CxIterator *iter, |
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689 | void const *elem, |
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690 | int prepend |
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691 | ) { |
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692 | struct cx_list_s *list = iter->src_handle; |
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693 | cx_linked_list_node *node = iter->elem_handle; |
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694 | if (node != NULL) { |
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695 | assert(prepend >= 0 && prepend <= 1); |
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696 | cx_linked_list_node *choice[2] = {node, node->prev}; |
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697 | int result = cx_ll_insert_at(list, choice[prepend], elem); |
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698 | iter->index += prepend * (0 == result); |
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699 | return result; |
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700 | } else { |
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701 | int result = cx_ll_insert(list, list->size, elem); |
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702 | iter->index = list->size; |
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703 | return result; |
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704 | } |
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705 | } |
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706 | |
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707 | static int cx_pll_insert_iter( |
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708 | CxIterator *iter, |
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709 | void const *elem, |
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710 | int prepend |
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711 | ) { |
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712 | return cx_ll_insert_iter(iter, &elem, prepend); |
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713 | } |
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714 | |
524 | 715 | static void cx_ll_destructor(CxList *list) { |
716 | cx_linked_list *ll = (cx_linked_list *) list; | |
717 | ||
718 | cx_linked_list_node *node = ll->begin; | |
719 | while (node) { | |
720 | void *next = node->next; | |
721 | cxFree(list->allocator, node); | |
722 | node = next; | |
723 | } | |
724 | // do not free the list pointer, this is just a destructor! | |
725 | } | |
726 | ||
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727 | static cx_list_class cx_linked_list_class = { |
524 | 728 | cx_ll_destructor, |
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729 | cx_ll_add, |
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730 | cx_ll_insert, |
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731 | cx_ll_insert_iter, |
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732 | cx_ll_remove, |
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733 | cx_ll_at, |
404 | 734 | cx_ll_find, |
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735 | cx_ll_sort, |
490 | 736 | cx_ll_compare, |
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737 | cx_ll_reverse, |
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738 | cx_ll_iterator |
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739 | }; |
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740 | |
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741 | static cx_list_class cx_pointer_linked_list_class = { |
524 | 742 | cx_ll_destructor, |
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743 | cx_pll_add, |
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744 | cx_pll_insert, |
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745 | cx_pll_insert_iter, |
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746 | cx_ll_remove, |
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747 | cx_pll_at, |
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748 | cx_ll_find, |
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749 | cx_ll_sort, |
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750 | cx_ll_compare, |
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751 | cx_ll_reverse, |
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752 | cx_pll_iterator, |
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753 | }; |
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754 | |
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755 | CxList *cxLinkedListCreate( |
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756 | CxAllocator const *allocator, |
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757 | CxListComparator comparator, |
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758 | size_t item_size |
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759 | ) { |
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760 | cx_linked_list *list = cxCalloc(allocator, 1, sizeof(cx_linked_list)); |
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761 | if (list == NULL) return NULL; |
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762 | |
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763 | list->follow_ptr = false; |
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764 | list->base.cl = &cx_linked_list_class; |
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765 | list->base.allocator = allocator; |
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766 | list->base.cmpfunc = comparator; |
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767 | list->base.itemsize = item_size; |
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768 | list->base.capacity = SIZE_MAX; |
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769 | |
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770 | return (CxList *) list; |
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771 | } |
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772 | |
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773 | CxList *cxPointerLinkedListCreate( |
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774 | CxAllocator const *allocator, |
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775 | CxListComparator comparator |
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776 | ) { |
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777 | cx_linked_list *list = cxCalloc(allocator, 1, sizeof(cx_linked_list)); |
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778 | if (list == NULL) return NULL; |
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779 | |
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780 | list->follow_ptr = true; |
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781 | list->base.cl = &cx_pointer_linked_list_class; |
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782 | list->base.allocator = allocator; |
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783 | list->base.cmpfunc = comparator; |
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784 | list->base.itemsize = sizeof(void *); |
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785 | list->base.capacity = SIZE_MAX; |
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786 | |
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787 | return (CxList *) list; |
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788 | } |
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789 | |
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790 | CxList *cxLinkedListFromArray( |
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791 | CxAllocator const *allocator, |
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792 | CxListComparator comparator, |
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793 | size_t item_size, |
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794 | size_t num_items, |
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795 | void const *array |
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796 | ) { |
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797 | CxList *list = cxLinkedListCreate(allocator, comparator, item_size); |
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798 | if (list == NULL) return NULL; |
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799 | cx_for_n (i, num_items) { |
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800 | if (0 != cxListAdd(list, ((const unsigned char *) array) + i * item_size)) { |
524 | 801 | cx_ll_destructor(list); |
802 | cxFree(allocator, list); | |
803 | return NULL; | |
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804 | } |
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805 | } |
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806 | return list; |
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807 | } |