ucx/cx/array_list.h

Thu, 23 May 2024 23:23:36 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 23 May 2024 23:23:36 +0200
changeset 818
bc782cca0759
parent 816
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permissions
-rw-r--r--

merge branch ucx-3.1

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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 * \copyright 2-Clause BSD License
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35 */
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36
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37
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38 #ifndef UCX_ARRAY_LIST_H
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39 #define UCX_ARRAY_LIST_H
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40
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41 #include "list.h"
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42
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43 #ifdef __cplusplus
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44 extern "C" {
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45 #endif
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46
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47 /**
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48 * The maximum item size in an array list that fits into stack buffer when swapped.
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49 */
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50 extern unsigned cx_array_swap_sbo_size;
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51
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52 /**
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53 * Declares variables for an array that can be used with the convenience macros.
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54 *
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55 * @see cx_array_simple_add()
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56 * @see cx_array_simple_copy()
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57 * @see cx_array_initialize()
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58 */
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59 #define CX_ARRAY_DECLARE(type, name) \
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60 type * name; \
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61 size_t name##_size; \
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62 size_t name##_capacity
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63
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64 /**
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65 * Initializes an array declared with CX_ARRAY_DECLARE().
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66 *
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67 * The memory for the array is allocated with stdlib malloc().
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68 * @param array the array
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69 * @param capacity the initial capacity
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70 */
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71 #define cx_array_initialize(array, capacity) \
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72 array##_capacity = capacity; \
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73 array##_size = 0; \
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74 array = malloc(sizeof(array[0]) * capacity)
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75
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76 /**
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77 * Defines a reallocation mechanism for arrays.
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78 */
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79 struct cx_array_reallocator_s {
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80 /**
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81 * Reallocates space for the given array.
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82 *
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83 * Implementations are not required to free the original array.
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84 * This allows reallocation of static memory by allocating heap memory
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85 * and copying the array contents. The information in the custom fields of
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86 * the referenced allocator can be used to track the state of the memory
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87 * or to transport other additional data.
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88 *
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89 * @param array the array to reallocate
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90 * @param capacity the new capacity (number of elements)
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91 * @param elem_size the size of each element
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92 * @param alloc a reference to this allocator
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93 * @return a pointer to the reallocated memory or \c NULL on failure
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94 */
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95 void *(*realloc)(
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96 void *array,
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97 size_t capacity,
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98 size_t elem_size,
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99 struct cx_array_reallocator_s *alloc
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100 );
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101
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102 /**
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103 * Custom data pointer.
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104 */
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105 void *ptr1;
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106 /**
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107 * Custom data pointer.
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108 */
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109 void *ptr2;
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110 /**
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111 * Custom data integer.
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112 */
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113 size_t int1;
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114 /**
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115 * Custom data integer.
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116 */
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117 size_t int2;
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118 };
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119
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120 /**
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121 * A default stdlib-based array reallocator.
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122 */
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123 extern struct cx_array_reallocator_s *cx_array_default_reallocator;
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124
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125 /**
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126 * Return codes for array functions.
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127 */
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128 enum cx_array_result {
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129 CX_ARRAY_SUCCESS,
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130 CX_ARRAY_REALLOC_NOT_SUPPORTED,
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131 CX_ARRAY_REALLOC_FAILED,
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132 };
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133
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134 /**
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135 * Copies elements from one array to another.
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136 *
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137 * The elements are copied to the \p target array at the specified \p index,
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138 * overwriting possible elements. The \p index does not need to be in range of
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139 * the current array \p size. If the new index plus the number of elements added
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140 * would extend the array's size, and \p capacity is not \c NULL, the remaining
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141 * capacity is used.
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142 *
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143 * If the capacity is insufficient to hold the new data, a reallocation
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144 * attempt is made, unless the \p reallocator is set to \c NULL, in which case
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145 * this function ultimately returns a failure.
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146 *
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147 * @param target a pointer to the target array
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148 * @param size a pointer to the size of the target array
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149 * @param capacity a pointer to the target array's capacity -
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150 * \c NULL if only the size shall be used to bound the array
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151 * @param index the index where the copied elements shall be placed
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152 * @param src the source array
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153 * @param elem_size the size of one element
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154 * @param elem_count the number of elements to copy
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155 * @param reallocator the array reallocator to use, or \c NULL
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156 * if reallocation shall not happen
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157 * @return zero on success, non-zero error code on failure
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158 */
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159 enum cx_array_result cx_array_copy(
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160 void **target,
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161 size_t *size,
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162 size_t *capacity,
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163 size_t index,
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164 void const *src,
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165 size_t elem_size,
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166 size_t elem_count,
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167 struct cx_array_reallocator_s *reallocator
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168 ) __attribute__((__nonnull__(1, 2, 5)));
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169
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170 /**
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171 * Convenience macro that uses cx_array_copy() with a default layout and the default reallocator.
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172 *
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173 * @param array the name of the array (NOT a pointer to the array)
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174 * @param index the index where the copied elements shall be placed
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175 * @param src the source array
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176 * @param count the number of elements to copy
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177 */
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178 #define cx_array_simple_copy(array, index, src, count) \
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179 cx_array_copy((void**)&(array), &(array##_size), &(array##_capacity), \
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180 index, src, sizeof((array)[0]), count, cx_array_default_reallocator)
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181
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182 /**
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183 * Adds an element to an array with the possibility of allocating more space.
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184 *
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185 * The element \p elem is added to the end of the \p target array which containing
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186 * \p size elements, already. The \p capacity must not be \c NULL and point a
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187 * variable holding the current maximum number of elements the array can hold.
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188 *
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189 * If the capacity is insufficient to hold the new element, and the optional
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190 * \p reallocator is not \c NULL, an attempt increase the \p capacity is made
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191 * and the new capacity is written back.
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192 *
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diff changeset
193 * @param target a pointer to the target array
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194 * @param size a pointer to the size of the target array
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195 * @param capacity a pointer to the target array's capacity - must not be \c NULL
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196 * @param elem_size the size of one element
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197 * @param elem a pointer to the element to add
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198 * @param reallocator the array reallocator to use, or \c NULL if reallocation shall not happen
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199 * @return zero on success, non-zero error code on failure
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200 */
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201 #define cx_array_add(target, size, capacity, elem_size, elem, reallocator) \
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202 cx_array_copy((void**)(target), size, capacity, *(size), elem, elem_size, 1, reallocator)
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203
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204 /**
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diff changeset
205 * Convenience macro that uses cx_array_add() with a default layout and the default reallocator.
839fefbdedc7 compatibility with UCX 3.1 plus several minor code fixes
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206 *
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207 * @param array the name of the array (NOT a pointer to the array)
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208 * @param elem the element to add (NOT a pointer, address is automatically taken)
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209 */
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210 #define cx_array_simple_add(array, elem) \
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211 cx_array_simple_copy(array, array##_size, &(elem), 1)
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212
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213 /**
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214 * Swaps two array elements.
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215 *
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216 * @param arr the array
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217 * @param elem_size the element size
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218 * @param idx1 index of first element
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219 * @param idx2 index of second element
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220 */
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221 void cx_array_swap(
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222 void *arr,
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223 size_t elem_size,
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224 size_t idx1,
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diff changeset
225 size_t idx2
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226 ) __attribute__((__nonnull__));
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diff changeset
227
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diff changeset
228 /**
816
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229 * Allocates an array list for storing elements with \p elem_size bytes each.
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230 *
816
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231 * If \p elem_size is CX_STORE_POINTERS, the created list will be created as if
839fefbdedc7 compatibility with UCX 3.1 plus several minor code fixes
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232 * cxListStorePointers() was called immediately after creation and the compare
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233 * function will be automatically set to cx_cmp_ptr(), if none is given.
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234 *
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235 * @param allocator the allocator for allocating the list memory
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236 * (if \c NULL the cxDefaultAllocator will be used)
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237 * @param comparator the comparator for the elements
816
839fefbdedc7 compatibility with UCX 3.1 plus several minor code fixes
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diff changeset
238 * (if \c NULL, and the list is not storing pointers, sort and find
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239 * functions will not work)
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diff changeset
240 * @param elem_size the size of each element in bytes
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241 * @param initial_capacity the initial number of elements the array can store
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242 * @return the created list
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243 */
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244 CxList *cxArrayListCreate(
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245 CxAllocator const *allocator,
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246 cx_compare_func comparator,
816
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diff changeset
247 size_t elem_size,
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diff changeset
248 size_t initial_capacity
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249 );
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diff changeset
250
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parents:
diff changeset
251 /**
816
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diff changeset
252 * Allocates an array list for storing elements with \p elem_size bytes each.
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253 *
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254 * The list will use the cxDefaultAllocator and \em NO compare function.
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255 * If you want to call functions that need a compare function, you have to
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256 * set it immediately after creation or use cxArrayListCreate().
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257 *
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258 * If \p elem_size is CX_STORE_POINTERS, the created list will be created as if
839fefbdedc7 compatibility with UCX 3.1 plus several minor code fixes
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diff changeset
259 * cxListStorePointers() was called immediately after creation and the compare
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260 * function will be automatically set to cx_cmp_ptr().
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261 *
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diff changeset
262 * @param elem_size the size of each element in bytes
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263 * @param initial_capacity the initial number of elements the array can store
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264 * @return the created list
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265 */
816
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diff changeset
266 #define cxArrayListCreateSimple(elem_size, initial_capacity) \
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267 cxArrayListCreate(NULL, NULL, elem_size, initial_capacity)
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268
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269 #ifdef __cplusplus
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270 } // extern "C"
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271 #endif
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272
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273 #endif // UCX_ARRAY_LIST_H

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