src/cx/array_list.h

Sat, 01 Apr 2023 11:51:48 +0200

author
Mike Becker <universe@uap-core.de>
date
Sat, 01 Apr 2023 11:51:48 +0200
changeset 672
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parent 670
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child 677
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permissions
-rw-r--r--

increase test coverage - fixes #250

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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 * \file array_list.h
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30 * \brief Array list implementation.
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31 * \details Also provides several low-level functions for custom array list implementations.
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32 * \author Mike Becker
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33 * \author Olaf Wintermann
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34 * \version 3.0
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35 * \copyright 2-Clause BSD License
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36 */
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37
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38
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39 #ifndef UCX_ARRAY_LIST_H
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40 #define UCX_ARRAY_LIST_H
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41
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42 #include "list.h"
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43
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44 #ifdef __cplusplus
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45 extern "C" {
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46 #endif
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47
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48 /**
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49 * Defines a reallocation mechanism for arrays.
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50 */
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51 struct cx_array_reallocator_s {
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52 /**
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53 * Re-allocates space for the given array.
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54 *
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55 * Implementations are not required to free the original array.
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56 * This allows re-allocation of static memory by allocating heap memory
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57 * and copying the array contents. The information in \p data can keep
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58 * track of the state of the memory or other additional allocator info.
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59 *
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60 * @param array the array to reallocate
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61 * @param capacity the new capacity (number of elements)
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62 * @param elem_size the size of each element
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63 * @param alloc a reference to this allocator
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64 * @return a pointer to the reallocated memory or \c NULL on failure
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65 */
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66 void *(*realloc)(
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67 void *array,
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68 size_t capacity,
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69 size_t elem_size,
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70 struct cx_array_reallocator_s *alloc
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71 );
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72
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73 /**
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74 * Custom data pointer.
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75 */
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76 void *ptr1;
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77 /**
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78 * Custom data pointer.
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79 */
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80 void *ptr2;
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81 /**
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82 * Custom data integer.
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83 */
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84 size_t int1;
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85 /**
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86 * Custom data integer.
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87 */
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88 size_t int2;
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89 };
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90
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91 /**
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92 * Return codes for cx_array_copy().
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93 */
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94 enum cx_array_copy_result {
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95 CX_ARRAY_COPY_SUCCESS,
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96 CX_ARRAY_COPY_REALLOC_NOT_SUPPORTED,
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97 CX_ARRAY_COPY_REALLOC_FAILED,
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98 };
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99
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100 /**
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101 * Copies elements from one array to another.
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102 *
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103 * The elements are copied to the \p target array at the specified \p index,
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104 * overwriting possible elements. The \p index does not need to be in range of
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105 * the current array \p size. If the new index plus the number of elements added
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106 * would extend the array's size, and \p capacity is not \c NULL, the remaining
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107 * capacity is used.
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108 *
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109 * If the capacity is insufficient to hold the new data, a reallocation
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110 * attempt is made, unless the allocator is set to \c NULL, in which case
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111 * this function ultimately returns a failure.
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112 *
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113 * @param target the target array
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114 * @param size a pointer to the size of the target array
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115 * @param capacity a pointer to the target array's capacity -
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116 * \c NULL if only the size shall be used to bound the array
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117 * @param index the index where the copied elements shall be placed
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118 * @param src the source array
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119 * @param elem_size the size of one element
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120 * @param elem_count the number of elements to copy
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121 * @param reallocator the array re-allocator to use, or \c NULL
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122 * if re-allocation shall not happen
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123 * @return zero on success, non-zero error code on failure
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124 */
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125 enum cx_array_copy_result cx_array_copy(
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126 void **target,
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127 size_t *size,
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128 size_t *capacity,
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129 size_t index,
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130 void const *src,
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131 size_t elem_size,
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132 size_t elem_count,
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133 struct cx_array_reallocator_s *reallocator
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134 ) __attribute__((__nonnull__(1, 2, 5)));
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135
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136
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137 /**
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138 * Swaps two array elements.
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139 *
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140 * @param arr the array
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141 * @param elem_size the element size
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142 * @param idx1 index of first element
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143 * @param idx2 index of second element
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144 */
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145 void cx_array_swap(
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146 void *arr,
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147 size_t elem_size,
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148 size_t idx1,
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149 size_t idx2
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150 ) __attribute__((__nonnull__));
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151
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152 /**
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153 * Allocates an array list for storing elements with \p item_size bytes each.
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154 *
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155 * If \p item_size is CX_STORE_POINTERS, the created list will be created as if
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156 * cxListStorePointers() was called immediately after creation.
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157 *
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158 * @param allocator the allocator for allocating the list memory
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159 * (if \c NULL the cxDefaultAllocator will be used)
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160 * @param comparator the comparator for the elements
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161 * (if \c NULL sort and find functions will not work)
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162 * @param item_size the size of each element in bytes
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163 * @param initial_capacity the initial number of elements the array can store
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164 * @return the created list
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165 */
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166 CxList *cxArrayListCreate(
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167 CxAllocator const *allocator,
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168 CxListComparator comparator,
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169 size_t item_size,
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170 size_t initial_capacity
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171 );
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172
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173 /**
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174 * Allocates an array list for storing elements with \p item_size bytes each.
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175 *
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176 * The list will use the cxDefaultAllocator and \em NO compare function.
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177 * If you want to call functions that need a compare function, you have to
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178 * set it immediately after creation or use cxArrayListCreate().
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179 *
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180 * If \p item_size is CX_STORE_POINTERS, the created list will be created as if
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181 * cxListStorePointers() was called immediately after creation.
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182 *
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183 * @param item_size the size of each element in bytes
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184 * @param initial_capacity the initial number of elements the array can store
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185 * @return the created list
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186 */
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187 #define cxArrayListCreateSimple(item_size, initial_capacity) \
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188 cxArrayListCreate(NULL, NULL, item_size, initial_capacity)
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189
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190 #ifdef __cplusplus
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191 } // extern "C"
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192 #endif
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193
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194 #endif // UCX_ARRAY_LIST_H

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