src/ucx/linked_list.c

Sat, 18 Mar 2023 11:44:37 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 18 Mar 2023 11:44:37 +0100
changeset 477
39ebd50cfc12
parent 438
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child 490
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permissions
-rw-r--r--

fix nsapi_error_request() could send empty error messages with http status 200, if the request status code wasn't set

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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
438
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340 void cx_linked_list_sort( // NOLINT(misc-no-recursion) - purposely recursive function
415
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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
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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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diff changeset
408 bool follow_ptr_right,
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409 CxListComparator cmp_func
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parents:
diff changeset
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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diff changeset
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 ) {
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diff changeset
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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parents:
diff changeset
437 void *prev = NULL;
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438 void *cur = *begin;
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diff changeset
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
438
22eca559aded refactore http listener creation
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parents: 415
diff changeset
458 // HIGH LEVEL LINKED LIST IMPLEMENTATION
415
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parents:
diff changeset
459
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parents:
diff changeset
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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diff changeset
463 cx_linked_list_node *next;
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464 char payload[];
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465 };
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parents:
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466
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diff changeset
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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parents:
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469 #define CX_LL_LOC_DATA offsetof(cx_linked_list_node, payload)
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diff changeset
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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diff changeset
476 } cx_linked_list;
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parents:
diff changeset
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 ) {
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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);
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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
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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,
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494 void const *elem
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495 ) {
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496
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497 // create the new new_node
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diff changeset
498 cx_linked_list_node *new_node = cxMalloc(list->allocator,
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diff changeset
499 sizeof(cx_linked_list_node) + list->itemsize);
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500
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501 // sortir if failed
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502 if (new_node == NULL) return 1;
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parents:
diff changeset
503
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504 // initialize new new_node
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parents:
diff changeset
505 new_node->prev = new_node->next = NULL;
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diff changeset
506 memcpy(new_node->payload, elem, list->itemsize);
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parents:
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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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parents:
diff changeset
510 cx_linked_list_insert_chain(
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diff changeset
511 (void **) &ll->begin, (void **) &ll->end,
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parents:
diff changeset
512 CX_LL_LOC_PREV, CX_LL_LOC_NEXT,
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diff changeset
513 node, new_node, new_node
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parents:
diff changeset
514 );
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parents:
diff changeset
515
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parents:
diff changeset
516 // increase the size and return
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parents:
diff changeset
517 list->size++;
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diff changeset
518 return 0;
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519 }
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parents:
diff changeset
520
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parents:
diff changeset
521 static int cx_ll_insert(
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diff changeset
522 struct cx_list_s *list,
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diff changeset
523 size_t index,
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diff changeset
524 void const *elem
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525 ) {
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parents:
diff changeset
526 // out-of bounds check
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527 if (index > list->size) return 1;
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parents:
diff changeset
528
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parents:
diff changeset
529 // find position efficiently
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parents:
diff changeset
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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parents:
diff changeset
532 // perform insert
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parents:
diff changeset
533 return cx_ll_insert_at(list, node, elem);
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534 }
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parents:
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535
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parents:
diff changeset
536 static int cx_ll_add(
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diff changeset
537 struct cx_list_s *list,
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diff changeset
538 void const *elem
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parents:
diff changeset
539 ) {
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parents:
diff changeset
540 return cx_ll_insert(list, list->size, elem);
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parents:
diff changeset
541 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
542
438
22eca559aded refactore http listener creation
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parents: 415
diff changeset
543 static size_t cx_ll_add_array(
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parents: 415
diff changeset
544 struct cx_list_s *list,
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parents: 415
diff changeset
545 void const *array,
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parents: 415
diff changeset
546 size_t n
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diff changeset
547 ) {
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diff changeset
548 // TODO: redirect to cx_ll_insert_array
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parents: 415
diff changeset
549 cx_for_n (i, n) {
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parents: 415
diff changeset
550 if (cx_ll_add(list, ((char const *) array) + i * list->itemsize)) {
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parents: 415
diff changeset
551 return i;
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parents: 415
diff changeset
552 }
22eca559aded refactore http listener creation
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diff changeset
553 }
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diff changeset
554 return n;
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 415
diff changeset
555 }
22eca559aded refactore http listener creation
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parents: 415
diff changeset
556
415
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
557 static int cx_pll_insert(
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
558 struct cx_list_s *list,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
559 size_t index,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
560 void const *elem
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
561 ) {
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parents:
diff changeset
562 return cx_ll_insert(list, index, &elem);
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
563 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
564
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
565 static int cx_pll_add(
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
566 struct cx_list_s *list,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
567 void const *elem
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
568 ) {
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
569 return cx_ll_insert(list, list->size, &elem);
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
570 }
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
571
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parents:
diff changeset
572 static int cx_ll_remove(
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parents:
diff changeset
573 struct cx_list_s *list,
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parents:
diff changeset
574 size_t index
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
575 ) {
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diff changeset
576 cx_linked_list *ll = (cx_linked_list *) list;
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parents:
diff changeset
577 cx_linked_list_node *node = cx_ll_node_at(ll, index);
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parents:
diff changeset
578
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
579 // out-of-bounds check
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parents:
diff changeset
580 if (node == NULL) return 1;
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parents:
diff changeset
581
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
582 // remove
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parents:
diff changeset
583 cx_linked_list_remove((void **) &ll->begin, (void **) &ll->end,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
584 CX_LL_LOC_PREV, CX_LL_LOC_NEXT, node);
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
585
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parents:
diff changeset
586 // adjust size
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parents:
diff changeset
587 list->size--;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
588
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
589 // free and return
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parents:
diff changeset
590 cxFree(list->allocator, node);
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
591
d938228c382e switch from ucx 2 to 3
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parents:
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592 return 0;
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parents:
diff changeset
593 }
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
594
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
595 static void *cx_ll_at(
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parents:
diff changeset
596 struct cx_list_s const *list,
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parents:
diff changeset
597 size_t index
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parents:
diff changeset
598 ) {
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
599 cx_linked_list *ll = (cx_linked_list *) list;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
600 cx_linked_list_node *node = cx_ll_node_at(ll, index);
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parents:
diff changeset
601 return node == NULL ? NULL : node->payload;
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parents:
diff changeset
602 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
603
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
604 static void *cx_pll_at(
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
605 struct cx_list_s const *list,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
606 size_t index
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
607 ) {
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
608 cx_linked_list *ll = (cx_linked_list *) list;
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
609 cx_linked_list_node *node = cx_ll_node_at(ll, index);
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
610 return node == NULL ? NULL : *(void **) node->payload;
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
611 }
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
612
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
613 static size_t cx_ll_find(
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
614 struct cx_list_s const *list,
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diff changeset
615 void const *elem
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parents:
diff changeset
616 ) {
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parents:
diff changeset
617 cx_linked_list *ll = (cx_linked_list *) list;
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diff changeset
618 return cx_linked_list_find(((cx_linked_list *) list)->begin,
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parents:
diff changeset
619 CX_LL_LOC_NEXT, CX_LL_LOC_DATA,
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parents:
diff changeset
620 ll->follow_ptr, list->cmpfunc, elem);
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parents:
diff changeset
621 }
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parents:
diff changeset
622
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
623 static void cx_ll_sort(struct cx_list_s *list) {
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diff changeset
624 cx_linked_list *ll = (cx_linked_list *) list;
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parents:
diff changeset
625 cx_linked_list_sort((void **) &ll->begin, (void **) &ll->end,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
626 CX_LL_LOC_PREV, CX_LL_LOC_NEXT, CX_LL_LOC_DATA,
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diff changeset
627 ll->follow_ptr, list->cmpfunc);
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parents:
diff changeset
628 }
d938228c382e switch from ucx 2 to 3
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diff changeset
629
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parents:
diff changeset
630 static void cx_ll_reverse(struct cx_list_s *list) {
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diff changeset
631 cx_linked_list *ll = (cx_linked_list *) list;
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parents:
diff changeset
632 cx_linked_list_reverse((void **) &ll->begin, (void **) &ll->end, CX_LL_LOC_PREV, CX_LL_LOC_NEXT);
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diff changeset
633 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
634
d938228c382e switch from ucx 2 to 3
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diff changeset
635 static int cx_ll_compare(
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parents:
diff changeset
636 struct cx_list_s const *list,
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parents:
diff changeset
637 struct cx_list_s const *other
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diff changeset
638 ) {
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parents:
diff changeset
639 cx_linked_list *left = (cx_linked_list *) list;
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parents:
diff changeset
640 cx_linked_list *right = (cx_linked_list *) other;
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parents:
diff changeset
641 return cx_linked_list_compare(left->begin, right->begin,
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parents:
diff changeset
642 CX_LL_LOC_NEXT, CX_LL_LOC_DATA,
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parents:
diff changeset
643 left->follow_ptr, right->follow_ptr, list->cmpfunc);
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
644 }
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parents:
diff changeset
645
438
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parents: 415
diff changeset
646 static bool cx_ll_iter_valid(void const *it) {
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diff changeset
647 struct cx_iterator_s const *iter = it;
415
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diff changeset
648 return iter->elem_handle != NULL;
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parents:
diff changeset
649 }
d938228c382e switch from ucx 2 to 3
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650
438
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diff changeset
651 static void cx_ll_iter_next(void *it) {
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652 struct cx_iterator_base_s *itbase = it;
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653 if (itbase->remove) {
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diff changeset
654 itbase->remove = false;
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655 struct cx_mut_iterator_s *iter = it;
415
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parents:
diff changeset
656 cx_linked_list *ll = iter->src_handle;
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diff changeset
657 cx_linked_list_node *node = iter->elem_handle;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
658 iter->elem_handle = node->next;
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parents:
diff changeset
659 cx_linked_list_remove((void **) &ll->begin, (void **) &ll->end,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
660 CX_LL_LOC_PREV, CX_LL_LOC_NEXT, node);
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parents:
diff changeset
661 ll->base.size--;
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parents:
diff changeset
662 cxFree(ll->base.allocator, node);
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diff changeset
663 } else {
438
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diff changeset
664 struct cx_iterator_s *iter = it;
415
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diff changeset
665 iter->index++;
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diff changeset
666 cx_linked_list_node *node = iter->elem_handle;
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parents:
diff changeset
667 iter->elem_handle = node->next;
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diff changeset
668 }
d938228c382e switch from ucx 2 to 3
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diff changeset
669 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
670
438
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diff changeset
671 static void *cx_ll_iter_current(void const *it) {
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672 struct cx_iterator_s const *iter = it;
415
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673 cx_linked_list_node *node = iter->elem_handle;
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674 return node->payload;
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675 }
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parents:
diff changeset
676
438
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677 static void *cx_pll_iter_current(void const *it) {
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678 struct cx_iterator_s const *iter = it;
415
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diff changeset
679 cx_linked_list_node *node = iter->elem_handle;
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diff changeset
680 return *(void **) node->payload;
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681 }
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682
438
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diff changeset
683 static bool cx_ll_iter_flag_rm(void *it) {
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diff changeset
684 struct cx_iterator_base_s *iter = it;
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diff changeset
685 if (iter->mutating) {
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diff changeset
686 iter->remove = true;
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diff changeset
687 return true;
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688 } else {
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689 return false;
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diff changeset
690 }
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parents: 415
diff changeset
691 }
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diff changeset
692
415
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diff changeset
693 static CxIterator cx_ll_iterator(
438
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diff changeset
694 struct cx_list_s const *list,
415
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diff changeset
695 size_t index
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diff changeset
696 ) {
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diff changeset
697 CxIterator iter;
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parents:
diff changeset
698 iter.index = index;
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parents:
diff changeset
699 iter.src_handle = list;
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diff changeset
700 iter.elem_handle = cx_ll_node_at((cx_linked_list const *) list, index);
438
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diff changeset
701 iter.base.valid = cx_ll_iter_valid;
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diff changeset
702 iter.base.current = cx_ll_iter_current;
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diff changeset
703 iter.base.next = cx_ll_iter_next;
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diff changeset
704 iter.base.flag_removal = cx_ll_iter_flag_rm;
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diff changeset
705 iter.base.mutating = false;
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diff changeset
706 iter.base.remove = false;
415
d938228c382e switch from ucx 2 to 3
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diff changeset
707 return iter;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
708 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
709
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parents:
diff changeset
710 static CxIterator cx_pll_iterator(
438
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diff changeset
711 struct cx_list_s const *list,
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diff changeset
712 size_t index
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713 ) {
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diff changeset
714 CxIterator iter = cx_ll_iterator(list, index);
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diff changeset
715 iter.base.current = cx_pll_iter_current;
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716 return iter;
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diff changeset
717 }
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diff changeset
718
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parents: 415
diff changeset
719 static CxMutIterator cx_ll_mut_iterator(
415
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
720 struct cx_list_s *list,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
721 size_t index
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parents:
diff changeset
722 ) {
438
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diff changeset
723 CxIterator it = cx_ll_iterator(list, index);
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diff changeset
724 it.base.mutating = true;
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diff changeset
725
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parents: 415
diff changeset
726 // we know the iterators share the same memory layout
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diff changeset
727 CxMutIterator iter;
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diff changeset
728 memcpy(&iter, &it, sizeof(CxMutIterator));
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729 return iter;
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diff changeset
730 }
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parents: 415
diff changeset
731
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diff changeset
732 static CxMutIterator cx_pll_mut_iterator(
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diff changeset
733 struct cx_list_s *list,
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diff changeset
734 size_t index
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735 ) {
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diff changeset
736 CxMutIterator iter = cx_ll_mut_iterator(list, index);
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diff changeset
737 iter.base.current = cx_pll_iter_current;
415
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parents:
diff changeset
738 return iter;
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parents:
diff changeset
739 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
740
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
741 static int cx_ll_insert_iter(
438
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diff changeset
742 CxMutIterator *iter,
415
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parents:
diff changeset
743 void const *elem,
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parents:
diff changeset
744 int prepend
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parents:
diff changeset
745 ) {
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parents:
diff changeset
746 struct cx_list_s *list = iter->src_handle;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
747 cx_linked_list_node *node = iter->elem_handle;
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
748 if (node != NULL) {
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
749 assert(prepend >= 0 && prepend <= 1);
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parents:
diff changeset
750 cx_linked_list_node *choice[2] = {node, node->prev};
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parents:
diff changeset
751 int result = cx_ll_insert_at(list, choice[prepend], elem);
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parents:
diff changeset
752 iter->index += prepend * (0 == result);
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parents:
diff changeset
753 return result;
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parents:
diff changeset
754 } else {
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parents:
diff changeset
755 int result = cx_ll_insert(list, list->size, elem);
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
756 iter->index = list->size;
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parents:
diff changeset
757 return result;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
758 }
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parents:
diff changeset
759 }
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
760
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
761 static int cx_pll_insert_iter(
438
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diff changeset
762 CxMutIterator *iter,
415
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parents:
diff changeset
763 void const *elem,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
764 int prepend
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parents:
diff changeset
765 ) {
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parents:
diff changeset
766 return cx_ll_insert_iter(iter, &elem, prepend);
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parents:
diff changeset
767 }
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parents:
diff changeset
768
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parents:
diff changeset
769 static void cx_ll_destructor(CxList *list) {
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
770 cx_linked_list *ll = (cx_linked_list *) list;
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parents:
diff changeset
771
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parents:
diff changeset
772 cx_linked_list_node *node = ll->begin;
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parents:
diff changeset
773 while (node) {
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parents:
diff changeset
774 void *next = node->next;
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
775 cxFree(list->allocator, node);
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
776 node = next;
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parents:
diff changeset
777 }
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
778 // do not free the list pointer, this is just a destructor!
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parents:
diff changeset
779 }
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parents:
diff changeset
780
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
781 static cx_list_class cx_linked_list_class = {
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
782 cx_ll_destructor,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
783 cx_ll_add,
438
22eca559aded refactore http listener creation
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parents: 415
diff changeset
784 cx_ll_add_array,
415
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
785 cx_ll_insert,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
786 cx_ll_insert_iter,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
787 cx_ll_remove,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
788 cx_ll_at,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
789 cx_ll_find,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
790 cx_ll_sort,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
791 cx_ll_compare,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
792 cx_ll_reverse,
438
22eca559aded refactore http listener creation
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 415
diff changeset
793 cx_ll_iterator,
22eca559aded refactore http listener creation
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parents: 415
diff changeset
794 cx_ll_mut_iterator,
415
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parents:
diff changeset
795 };
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
796
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
797 static cx_list_class cx_pointer_linked_list_class = {
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parents:
diff changeset
798 cx_ll_destructor,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
799 cx_pll_add,
438
22eca559aded refactore http listener creation
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 415
diff changeset
800 cx_ll_add_array,
415
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
801 cx_pll_insert,
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
802 cx_pll_insert_iter,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
803 cx_ll_remove,
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parents:
diff changeset
804 cx_pll_at,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
805 cx_ll_find,
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parents:
diff changeset
806 cx_ll_sort,
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parents:
diff changeset
807 cx_ll_compare,
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
808 cx_ll_reverse,
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
809 cx_pll_iterator,
438
22eca559aded refactore http listener creation
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parents: 415
diff changeset
810 cx_pll_mut_iterator,
415
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parents:
diff changeset
811 };
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parents:
diff changeset
812
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parents:
diff changeset
813 CxList *cxLinkedListCreate(
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parents:
diff changeset
814 CxAllocator const *allocator,
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parents:
diff changeset
815 CxListComparator comparator,
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parents:
diff changeset
816 size_t item_size
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parents:
diff changeset
817 ) {
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parents:
diff changeset
818 cx_linked_list *list = cxCalloc(allocator, 1, sizeof(cx_linked_list));
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
819 if (list == NULL) return NULL;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
820
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
821 list->follow_ptr = false;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
822 list->base.cl = &cx_linked_list_class;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
823 list->base.allocator = allocator;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
824 list->base.cmpfunc = comparator;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
825 list->base.itemsize = item_size;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
826 list->base.capacity = SIZE_MAX;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
827
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parents:
diff changeset
828 return (CxList *) list;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
829 }
d938228c382e switch from ucx 2 to 3
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
830
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
831 CxList *cxPointerLinkedListCreate(
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
832 CxAllocator const *allocator,
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parents:
diff changeset
833 CxListComparator comparator
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
834 ) {
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parents:
diff changeset
835 cx_linked_list *list = cxCalloc(allocator, 1, sizeof(cx_linked_list));
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
836 if (list == NULL) return NULL;
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parents:
diff changeset
837
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parents:
diff changeset
838 list->follow_ptr = true;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
839 list->base.cl = &cx_pointer_linked_list_class;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
840 list->base.allocator = allocator;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
841 list->base.cmpfunc = comparator;
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
842 list->base.itemsize = sizeof(void *);
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
843 list->base.capacity = SIZE_MAX;
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parents:
diff changeset
844
d938228c382e switch from ucx 2 to 3
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parents:
diff changeset
845 return (CxList *) list;
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parents:
diff changeset
846 }

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