src/cx/list.h

Sun, 09 Apr 2023 20:00:44 +0200

author
Mike Becker <universe@uap-core.de>
date
Sun, 09 Apr 2023 20:00:44 +0200
changeset 680
19379743e5a0
parent 677
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child 681
502105523db7
permissions
-rw-r--r--

fix wrong operator precedence in destructor macros

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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 list.h
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30 * \brief Interface for list implementations.
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31 * \author Mike Becker
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32 * \author Olaf Wintermann
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33 * \version 3.0
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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 #ifndef UCX_LIST_H
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38 #define UCX_LIST_H
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39
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40 #include "collection.h"
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41
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42 #ifdef __cplusplus
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43 extern "C" {
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44 #endif
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45
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46 /**
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47 * List class type.
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48 */
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49 typedef struct cx_list_class_s cx_list_class;
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50
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51 /**
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52 * Structure for holding the base data of a list.
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53 */
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54 struct cx_list_s {
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55 CX_COLLECTION_MEMBERS
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56 /**
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57 * The list class definition.
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58 */
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59 cx_list_class const *cl;
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60 /**
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61 * The actual implementation in case the list class is delegating.
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62 */
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63 cx_list_class const *climpl;
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64 };
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65
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66 /**
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67 * The class definition for arbitrary lists.
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68 */
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69 struct cx_list_class_s {
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70 /**
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71 * Destructor function.
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72 */
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73 void (*destructor)(struct cx_list_s *list);
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74
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75 /**
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76 * Member function for inserting a single elements.
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77 * Implementors SHOULD see to performant implementations for corner cases.
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78 */
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79 int (*insert_element)(
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80 struct cx_list_s *list,
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81 size_t index,
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82 void const *data
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83 );
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84
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85 /**
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86 * Member function for inserting multiple elements.
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87 * Implementors SHOULD see to performant implementations for corner cases.
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88 */
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89 size_t (*insert_array)(
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90 struct cx_list_s *list,
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91 size_t index,
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92 void const *data,
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93 size_t n
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94 );
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95
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96 /**
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97 * Member function for inserting an element relative to an iterator position.
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98 */
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99 int (*insert_iter)(
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100 struct cx_mut_iterator_s *iter,
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101 void const *elem,
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102 int prepend
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103 );
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104
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105 /**
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106 * Member function for removing an element.
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107 */
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108 int (*remove)(
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109 struct cx_list_s *list,
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110 size_t index
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111 );
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112
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113 /**
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114 * Member function for removing all elements.
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115 */
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116 void (*clear)(struct cx_list_s *list);
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117
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118 /**
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119 * Member function for swapping two elements.
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120 */
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121 int (*swap)(
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122 struct cx_list_s *list,
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123 size_t i,
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124 size_t j
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125 );
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126
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127 /**
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128 * Member function for element lookup.
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129 */
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130 void *(*at)(
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131 struct cx_list_s const *list,
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132 size_t index
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133 );
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134
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135 /**
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136 * Member function for finding an element.
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137 */
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138 size_t (*find)(
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139 struct cx_list_s const *list,
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140 void const *elem
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141 );
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142
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143 /**
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144 * Member function for sorting the list in place.
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145 */
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146 void (*sort)(struct cx_list_s *list);
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147
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148 /**
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149 * Member function for comparing this list to another list of the same type.
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150 */
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151 int (*compare)(
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152 struct cx_list_s const *list,
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153 struct cx_list_s const *other
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154 );
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155
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156 /**
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157 * Member function for reversing the order of the items.
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158 */
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159 void (*reverse)(struct cx_list_s *list);
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160
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161 /**
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162 * Member function for returning an iterator pointing to the specified index.
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163 */
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164 struct cx_iterator_s (*iterator)(
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165 struct cx_list_s const *list,
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166 size_t index,
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167 bool backward
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168 );
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169 };
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170
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171 /**
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172 * Common type for all list implementations.
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173 */
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174 typedef struct cx_list_s CxList;
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175
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176 /**
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177 * Advises the list to store copies of the objects (default mode of operation).
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178 *
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179 * Retrieving objects from this list will yield pointers to the copies stored
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180 * within this list.
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181 *
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182 * @param list the list
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183 * @see cxListStorePointers()
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184 */
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185 __attribute__((__nonnull__))
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186 void cxListStoreObjects(CxList *list);
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187
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188 /**
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189 * Advises the list to only store pointers to the objects.
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190 *
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191 * Retrieving objects from this list will yield the original pointers stored.
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192 *
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193 * @note This function forcibly sets the element size to the size of a pointer.
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194 * Invoking this function on a non-empty list that already stores copies of
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195 * objects is undefined.
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196 *
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197 * @param list the list
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198 * @see cxListStoreObjects()
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199 */
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200 __attribute__((__nonnull__))
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201 void cxListStorePointers(CxList *list);
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202
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203 /**
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204 * Returns true, if this list is storing pointers instead of the actual data.
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205 *
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206 * @param list
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207 * @return true, if this list is storing pointers
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208 * @see cxListStorePointers()
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209 */
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210 __attribute__((__nonnull__))
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211 static inline bool cxListIsStoringPointers(CxList const *list) {
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212 return list->store_pointer;
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213 }
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214
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215 /**
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216 * Returns the number of elements currently stored in the list.
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217 *
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218 * @param list the list
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219 * @return the number of currently stored elements
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220 */
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221 __attribute__((__nonnull__))
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222 static inline size_t cxListSize(CxList const *list) {
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223 return list->size;
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224 }
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225
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226 /**
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227 * Adds an item to the end of the list.
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228 *
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229 * @param list the list
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230 * @param elem a pointer to the element to add
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231 * @return zero on success, non-zero on memory allocation failure
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232 * @see cxListAddArray()
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233 */
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234 __attribute__((__nonnull__))
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235 static inline int cxListAdd(
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236 CxList *list,
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237 void const *elem
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238 ) {
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239 return list->cl->insert_element(list, list->size, elem);
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240 }
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241
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242 /**
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243 * Adds multiple items to the end of the list.
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244 *
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245 * This method is more efficient than invoking cxListAdd() multiple times.
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246 *
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247 * If there is not enough memory to add all elements, the returned value is
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248 * less than \p n.
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249 *
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250 * If this list is storing pointers instead of objects \p array is expected to
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251 * be an array of pointers.
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252 *
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253 * @param list the list
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254 * @param array a pointer to the elements to add
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255 * @param n the number of elements to add
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256 * @return the number of added elements
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257 */
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258 __attribute__((__nonnull__))
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259 static inline size_t cxListAddArray(
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260 CxList *list,
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261 void const *array,
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262 size_t n
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263 ) {
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264 return list->cl->insert_array(list, list->size, array, n);
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265 }
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266
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267 /**
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268 * Inserts an item at the specified index.
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269 *
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270 * If \p index equals the list \c size, this is effectively cxListAdd().
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271 *
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272 * @param list the list
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273 * @param index the index the element shall have
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274 * @param elem a pointer to the element to add
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275 * @return zero on success, non-zero on memory allocation failure
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276 * or when the index is out of bounds
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277 * @see cxListInsertAfter()
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278 * @see cxListInsertBefore()
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279 */
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280 __attribute__((__nonnull__))
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281 static inline int cxListInsert(
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282 CxList *list,
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283 size_t index,
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284 void const *elem
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285 ) {
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286 return list->cl->insert_element(list, index, elem);
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287 }
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288
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289 /**
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290 * Inserts multiple items to the list at the specified index.
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291 * If \p index equals the list size, this is effectively cxListAddArray().
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292 *
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293 * This method is usually more efficient than invoking cxListInsert()
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294 * multiple times.
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295 *
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296 * If there is not enough memory to add all elements, the returned value is
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297 * less than \p n.
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298 *
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299 * If this list is storing pointers instead of objects \p array is expected to
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300 * be an array of pointers.
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301 *
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302 * @param list the list
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303 * @param index the index where to add the elements
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304 * @param array a pointer to the elements to add
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305 * @param n the number of elements to add
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306 * @return the number of added elements
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307 */
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308 __attribute__((__nonnull__))
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309 static inline size_t cxListInsertArray(
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310 CxList *list,
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311 size_t index,
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312 void const *array,
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313 size_t n
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314 ) {
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315 return list->cl->insert_array(list, index, array, n);
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316 }
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317
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318 /**
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319 * Inserts an element after the current location of the specified iterator.
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320 *
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321 * The used iterator remains operational, but all other active iterators should
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322 * be considered invalidated.
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323 *
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324 * If \p iter is not a list iterator, the behavior is undefined.
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325 * If \p iter is a past-the-end iterator, the new element gets appended to the list.
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326 *
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327 * @param iter an iterator
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328 * @param elem the element to insert
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329 * @return zero on success, non-zero on memory allocation failure
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330 * @see cxListInsert()
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331 * @see cxListInsertBefore()
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332 */
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333 __attribute__((__nonnull__))
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334 static inline int cxListInsertAfter(
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335 CxMutIterator *iter,
499
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336 void const *elem
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337 ) {
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338 return ((struct cx_list_s *) iter->src_handle)->cl->insert_iter(iter, elem, 0);
499
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339 }
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340
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341 /**
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342 * Inserts an element before the current location of the specified iterator.
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343 *
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344 * The used iterator remains operational, but all other active iterators should
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345 * be considered invalidated.
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346 *
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347 * If \p iter is not a list iterator, the behavior is undefined.
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348 * If \p iter is a past-the-end iterator, the new element gets appended to the list.
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349 *
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350 * @param iter an iterator
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351 * @param elem the element to insert
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352 * @return zero on success, non-zero on memory allocation failure
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353 * @see cxListInsert()
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354 * @see cxListInsertAfter()
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355 */
508
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356 __attribute__((__nonnull__))
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357 static inline int cxListInsertBefore(
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358 CxMutIterator *iter,
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359 void const *elem
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360 ) {
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361 return ((struct cx_list_s *) iter->src_handle)->cl->insert_iter(iter, elem, 1);
499
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362 }
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363
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364 /**
464
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365 * Removes the element at the specified index.
664
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366 *
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367 * If an element destructor function is specified, it is called before
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368 * removing the element.
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369 *
464
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370 * @param list the list
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371 * @param index the index of the element
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372 * @return zero on success, non-zero if the index is out of bounds
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373 */
508
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374 __attribute__((__nonnull__))
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375 static inline int cxListRemove(
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376 CxList *list,
489
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377 size_t index
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378 ) {
469
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379 return list->cl->remove(list, index);
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380 }
398
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381
464
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382 /**
664
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383 * Removes all elements from this list.
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384 *
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385 * If an element destructor function is specified, it is called for each
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386 * element before removing them.
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387 *
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388 * @param list the list
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389 */
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390 __attribute__((__nonnull__))
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391 static inline void cxListClear(CxList *list) {
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392 list->cl->clear(list);
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393 }
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394
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395 /**
647
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396 * Swaps two items in the list.
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397 *
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398 * Implementations should only allocate temporary memory for the swap, if
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399 * it is necessary.
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400 *
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401 * @param list the list
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402 * @param i the index of the first element
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403 * @param j the index of the second element
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404 * @return zero on success, non-zero if one of the indices is out of bounds
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405 */
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406 __attribute__((__nonnull__))
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407 static inline int cxListSwap(
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408 CxList *list,
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409 size_t i,
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410 size_t j
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411 ) {
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412 return list->cl->swap(list, i, j);
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413 }
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414
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415 /**
464
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416 * Returns a pointer to the element at the specified index.
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417 *
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418 * @param list the list
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419 * @param index the index of the element
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420 * @return a pointer to the element or \c NULL if the index is out of bounds
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421 */
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422 __attribute__((__nonnull__))
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423 static inline void *cxListAt(
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424 CxList *list,
489
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425 size_t index
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426 ) {
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427 return list->cl->at(list, index);
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428 }
439
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429
464
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430 /**
494
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431 * Returns an iterator pointing to the item at the specified index.
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432 *
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433 * The returned iterator is position-aware.
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434 *
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435 * If the index is out of range, a past-the-end iterator will be returned.
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436 *
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437 * @param list the list
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438 * @param index the index where the iterator shall point at
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439 * @return a new iterator
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440 */
508
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441 __attribute__((__nonnull__, __warn_unused_result__))
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442 static inline CxIterator cxListIteratorAt(
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443 CxList const *list,
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444 size_t index
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445 ) {
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446 return list->cl->iterator(list, index, false);
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447 }
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448
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449 /**
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450 * Returns a backwards iterator pointing to the item at the specified index.
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451 *
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452 * The returned iterator is position-aware.
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453 *
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454 * If the index is out of range, a past-the-end iterator will be returned.
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455 *
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456 * @param list the list
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457 * @param index the index where the iterator shall point at
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458 * @return a new iterator
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459 */
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460 __attribute__((__nonnull__, __warn_unused_result__))
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461 static inline CxIterator cxListBackwardsIteratorAt(
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462 CxList const *list,
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463 size_t index
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464 ) {
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465 return list->cl->iterator(list, index, true);
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466 }
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467
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468 /**
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469 * Returns a mutating iterator pointing to the item at the specified index.
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470 *
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471 * The returned iterator is position-aware.
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472 *
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473 * If the index is out of range, a past-the-end iterator will be returned.
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474 *
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475 * @param list the list
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476 * @param index the index where the iterator shall point at
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477 * @return a new iterator
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478 */
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479 __attribute__((__nonnull__, __warn_unused_result__))
655
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480 CxMutIterator cxListMutIteratorAt(
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481 CxList *list,
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482 size_t index
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483 );
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484
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485 /**
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diff changeset
486 * Returns a mutating backwards iterator pointing to the item at the
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487 * specified index.
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488 *
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489 * The returned iterator is position-aware.
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490 *
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491 * If the index is out of range, a past-the-end iterator will be returned.
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492 *
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493 * @param list the list
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494 * @param index the index where the iterator shall point at
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495 * @return a new iterator
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496 */
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497 __attribute__((__nonnull__, __warn_unused_result__))
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498 CxMutIterator cxListMutBackwardsIteratorAt(
500
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499 CxList *list,
494
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500 size_t index
640
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501 );
494
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502
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503 /**
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504 * Returns an iterator pointing to the first item of the list.
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505 *
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506 * The returned iterator is position-aware.
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507 *
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508 * If the list is empty, a past-the-end iterator will be returned.
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509 *
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510 * @param list the list
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diff changeset
511 * @return a new iterator
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512 */
508
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513 __attribute__((__nonnull__, __warn_unused_result__))
655
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514 static inline CxIterator cxListIterator(CxList const *list) {
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515 return list->cl->iterator(list, 0, false);
494
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516 }
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517
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diff changeset
518 /**
630
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519 * Returns a mutating iterator pointing to the first item of the list.
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520 *
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521 * The returned iterator is position-aware.
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522 *
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523 * If the list is empty, a past-the-end iterator will be returned.
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524 *
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525 * @param list the list
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526 * @return a new iterator
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527 */
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528 __attribute__((__nonnull__, __warn_unused_result__))
655
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529 static inline CxMutIterator cxListMutIterator(CxList *list) {
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530 return cxListMutIteratorAt(list, 0);
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531 }
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532
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diff changeset
533
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534 /**
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535 * Returns a backwards iterator pointing to the last item of the list.
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diff changeset
536 *
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537 * The returned iterator is position-aware.
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diff changeset
538 *
7340c4255f1f implement backwards iterator - fixes #238
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539 * If the list is empty, a past-the-end iterator will be returned.
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540 *
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541 * @param list the list
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diff changeset
542 * @return a new iterator
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diff changeset
543 */
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diff changeset
544 __attribute__((__nonnull__, __warn_unused_result__))
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545 static inline CxIterator cxListBackwardsIterator(CxList const *list) {
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diff changeset
546 return list->cl->iterator(list, list->size - 1, true);
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547 }
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diff changeset
548
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diff changeset
549 /**
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diff changeset
550 * Returns a mutating backwards iterator pointing to the last item of the list.
7340c4255f1f implement backwards iterator - fixes #238
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diff changeset
551 *
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552 * The returned iterator is position-aware.
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diff changeset
553 *
7340c4255f1f implement backwards iterator - fixes #238
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554 * If the list is empty, a past-the-end iterator will be returned.
7340c4255f1f implement backwards iterator - fixes #238
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diff changeset
555 *
7340c4255f1f implement backwards iterator - fixes #238
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diff changeset
556 * @param list the list
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diff changeset
557 * @return a new iterator
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diff changeset
558 */
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diff changeset
559 __attribute__((__nonnull__, __warn_unused_result__))
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diff changeset
560 static inline CxMutIterator cxListMutBackwardsIterator(CxList *list) {
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561 return cxListMutBackwardsIteratorAt(list, list->size - 1);
630
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562 }
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563
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diff changeset
564 /**
464
7fafc95968fc add documentation for list.h
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parents: 460
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565 * Returns the index of the first element that equals \p elem.
7fafc95968fc add documentation for list.h
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parents: 460
diff changeset
566 *
7fafc95968fc add documentation for list.h
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parents: 460
diff changeset
567 * Determining equality is performed by the list's comparator function.
7fafc95968fc add documentation for list.h
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parents: 460
diff changeset
568 *
7fafc95968fc add documentation for list.h
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parents: 460
diff changeset
569 * @param list the list
7fafc95968fc add documentation for list.h
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diff changeset
570 * @param elem the element to find
7fafc95968fc add documentation for list.h
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571 * @return the index of the element or \c (size+1) if the element is not found
7fafc95968fc add documentation for list.h
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diff changeset
572 */
508
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573 __attribute__((__nonnull__))
489
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diff changeset
574 static inline size_t cxListFind(
621
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parents: 618
diff changeset
575 CxList const *list,
489
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diff changeset
576 void const *elem
af6be1e123aa add some const qualifiers
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diff changeset
577 ) {
469
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diff changeset
578 return list->cl->find(list, elem);
0458bff0b1cd add high level list sort and inlines method invocation functions
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parents: 464
diff changeset
579 }
398
8d506ed6c1c0 adds first draft for linked list implementation
Mike Becker <universe@uap-core.de>
parents: 393
diff changeset
580
464
7fafc95968fc add documentation for list.h
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parents: 460
diff changeset
581 /**
469
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parents: 464
diff changeset
582 * Sorts the list in place.
0458bff0b1cd add high level list sort and inlines method invocation functions
Mike Becker <universe@uap-core.de>
parents: 464
diff changeset
583 *
0458bff0b1cd add high level list sort and inlines method invocation functions
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parents: 464
diff changeset
584 * \remark The underlying sort algorithm is implementation defined.
0458bff0b1cd add high level list sort and inlines method invocation functions
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parents: 464
diff changeset
585 *
0458bff0b1cd add high level list sort and inlines method invocation functions
Mike Becker <universe@uap-core.de>
parents: 464
diff changeset
586 * @param list the list
0458bff0b1cd add high level list sort and inlines method invocation functions
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parents: 464
diff changeset
587 */
508
8aea65ae1eaf #168 - add attributes and const
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parents: 505
diff changeset
588 __attribute__((__nonnull__))
500
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parents: 499
diff changeset
589 static inline void cxListSort(CxList *list) {
469
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parents: 464
diff changeset
590 list->cl->sort(list);
0458bff0b1cd add high level list sort and inlines method invocation functions
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diff changeset
591 }
404
86ebc3745e62 adds cxListLast
Mike Becker <universe@uap-core.de>
parents: 401
diff changeset
592
488
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
Mike Becker <universe@uap-core.de>
parents: 484
diff changeset
593 /**
490
e66551b47466 add cxListReverse()
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parents: 489
diff changeset
594 * Reverses the order of the items.
e66551b47466 add cxListReverse()
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parents: 489
diff changeset
595 *
e66551b47466 add cxListReverse()
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
596 * @param list the list
e66551b47466 add cxListReverse()
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parents: 489
diff changeset
597 */
508
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parents: 505
diff changeset
598 __attribute__((__nonnull__))
500
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parents: 499
diff changeset
599 static inline void cxListReverse(CxList *list) {
490
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diff changeset
600 list->cl->reverse(list);
e66551b47466 add cxListReverse()
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parents: 489
diff changeset
601 }
e66551b47466 add cxListReverse()
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parents: 489
diff changeset
602
e66551b47466 add cxListReverse()
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
603 /**
488
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
Mike Becker <universe@uap-core.de>
parents: 484
diff changeset
604 * Compares a list to another list of the same type.
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
Mike Becker <universe@uap-core.de>
parents: 484
diff changeset
605 *
618
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parents: 528
diff changeset
606 * First, the list sizes are compared.
1f5a8f6f3015 #219 array list: implement compare
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parents: 528
diff changeset
607 * If they match, the lists are compared element-wise.
488
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
Mike Becker <universe@uap-core.de>
parents: 484
diff changeset
608 *
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
Mike Becker <universe@uap-core.de>
parents: 484
diff changeset
609 * @param list the list
9138acaa494b add cxLinkedListFromArray() and cxListCompare()
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parents: 484
diff changeset
610 * @param other the list to compare to
618
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611 * @return zero, if both lists are equal element wise,
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612 * negative if the first list is smaller, positive if the first list is larger
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613 */
508
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614 __attribute__((__nonnull__))
618
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615 int cxListCompare(
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616 CxList const *list,
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617 CxList const *other
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618 );
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619
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620 /**
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621 * Deallocates the memory of the specified list structure.
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622 *
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623 * Also calls content a destructor function, depending on the configuration
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624 * in CxList.content_destructor_type.
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625 *
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626 * This function itself is a destructor function for the CxList.
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627 *
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628 * @param list the list which shall be destroyed
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629 */
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630 __attribute__((__nonnull__))
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631 void cxListDestroy(CxList *list);
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632
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633 #ifdef __cplusplus
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634 } // extern "C"
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635 #endif
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636
628
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637 #endif // UCX_LIST_H

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