src/ucx/list.c

Thu, 03 Feb 2022 18:03:27 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 03 Feb 2022 18:03:27 +0100
branch
webdav
changeset 284
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parent 260
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child 415
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permissions
-rw-r--r--

add missing postgresql vfs io functions

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "ucx/list.h"
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30
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31 UcxList *ucx_list_clone(const UcxList *l, copy_func fnc, void *data) {
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32 return ucx_list_clone_a(ucx_default_allocator(), l, fnc, data);
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33 }
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34
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35 UcxList *ucx_list_clone_a(UcxAllocator *alloc, const UcxList *l,
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36 copy_func fnc, void *data) {
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37 UcxList *ret = NULL;
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38 while (l) {
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39 if (fnc) {
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40 ret = ucx_list_append_a(alloc, ret, fnc(l->data, data));
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41 } else {
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42 ret = ucx_list_append_a(alloc, ret, l->data);
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43 }
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44 l = l->next;
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45 }
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46 return ret;
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47 }
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48
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49 int ucx_list_equals(const UcxList *l1, const UcxList *l2,
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50 cmp_func fnc, void* data) {
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51 if (l1 == l2) return 1;
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52
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53 while (l1 != NULL && l2 != NULL) {
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54 if (fnc == NULL) {
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55 if (l1->data != l2->data) return 0;
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56 } else {
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57 if (fnc(l1->data, l2->data, data) != 0) return 0;
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58 }
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59 l1 = l1->next;
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60 l2 = l2->next;
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61 }
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62
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63 return (l1 == NULL && l2 == NULL);
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64 }
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65
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66 void ucx_list_free(UcxList *l) {
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67 ucx_list_free_a(ucx_default_allocator(), l);
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68 }
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69
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70 void ucx_list_free_a(UcxAllocator *alloc, UcxList *l) {
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71 UcxList *e = l, *f;
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72 while (e != NULL) {
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73 f = e;
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74 e = e->next;
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75 alfree(alloc, f);
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76 }
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77 }
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78
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79 void ucx_list_free_content(UcxList* list, ucx_destructor destr) {
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80 if (!destr) destr = free;
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81 while (list != NULL) {
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82 destr(list->data);
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83 list = list->next;
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84 }
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85 }
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86
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87 UcxList *ucx_list_append(UcxList *l, void *data) {
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88 return ucx_list_append_a(ucx_default_allocator(), l, data);
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89 }
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90
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91 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data) {
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92 UcxList *nl = (UcxList*) almalloc(alloc, sizeof(UcxList));
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93 if (!nl) {
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94 return NULL;
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95 }
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96
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97 nl->data = data;
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98 nl->next = NULL;
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99 if (l) {
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100 UcxList *t = ucx_list_last(l);
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101 t->next = nl;
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102 nl->prev = t;
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103 return l;
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104 } else {
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105 nl->prev = NULL;
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106 return nl;
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107 }
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108 }
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109
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110 UcxList *ucx_list_prepend(UcxList *l, void *data) {
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111 return ucx_list_prepend_a(ucx_default_allocator(), l, data);
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112 }
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113
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114 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
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115 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
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116 if (!nl) {
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117 return NULL;
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118 }
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119 l = ucx_list_first(l);
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120
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121 if (l) {
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122 nl->next = l;
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123 l->prev = nl;
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124 }
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125 return nl;
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126 }
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127
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128 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
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129 if (l1) {
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130 UcxList *last = ucx_list_last(l1);
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131 last->next = l2;
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132 if (l2) {
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133 l2->prev = last;
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134 }
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135 return l1;
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136 } else {
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137 return l2;
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138 }
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139 }
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140
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141 UcxList *ucx_list_last(const UcxList *l) {
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142 if (l == NULL) return NULL;
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143
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144 const UcxList *e = l;
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145 while (e->next != NULL) {
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146 e = e->next;
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147 }
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148 return (UcxList*)e;
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149 }
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150
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151 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
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152 ssize_t index = 0;
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153 while (list) {
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154 if (list == elem) {
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155 return index;
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156 }
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157 list = list->next;
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158 index++;
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159 }
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160 return -1;
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161 }
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162
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163 UcxList *ucx_list_get(const UcxList *l, size_t index) {
91
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164 if (l == NULL) return NULL;
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165
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166 const UcxList *e = l;
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167 while (e->next && index > 0) {
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168 e = e->next;
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169 index--;
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170 }
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171
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172 return (UcxList*)(index == 0 ? e : NULL);
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173 }
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174
260
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175 ssize_t ucx_list_find(const UcxList *l, void *elem,
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176 cmp_func fnc, void *cmpdata) {
91
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177 ssize_t index = 0;
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178 UCX_FOREACH(e, l) {
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179 if (fnc) {
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180 if (fnc(elem, e->data, cmpdata) == 0) {
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181 return index;
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182 }
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183 } else {
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184 if (elem == e->data) {
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185 return index;
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186 }
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187 }
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188 index++;
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189 }
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190 return -1;
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191 }
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192
260
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193 int ucx_list_contains(const UcxList *l, void *elem,
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194 cmp_func fnc, void *cmpdata) {
91
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195 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
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196 }
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197
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198 size_t ucx_list_size(const UcxList *l) {
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199 if (l == NULL) return 0;
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200
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201 const UcxList *e = l;
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202 size_t s = 1;
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203 while (e->next != NULL) {
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204 e = e->next;
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205 s++;
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206 }
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207
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208 return s;
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209 }
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210
254
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211 static UcxList *ucx_list_sort_merge(size_t length,
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212 UcxList* ls, UcxList* le, UcxList* re,
91
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213 cmp_func fnc, void* data) {
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214
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215 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
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216 UcxList *rc, *lc;
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217
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218 lc = ls; rc = le;
254
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219 size_t n = 0;
91
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220 while (lc && lc != le && rc != re) {
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221 if (fnc(lc->data, rc->data, data) <= 0) {
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222 sorted[n] = lc;
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223 lc = lc->next;
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224 } else {
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225 sorted[n] = rc;
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226 rc = rc->next;
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227 }
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228 n++;
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229 }
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230 while (lc && lc != le) {
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231 sorted[n] = lc;
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232 lc = lc->next;
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233 n++;
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234 }
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235 while (rc && rc != re) {
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236 sorted[n] = rc;
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237 rc = rc->next;
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238 n++;
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239 }
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240
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241 // Update pointer
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242 sorted[0]->prev = NULL;
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243 for (int i = 0 ; i < length-1 ; i++) {
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244 sorted[i]->next = sorted[i+1];
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245 sorted[i+1]->prev = sorted[i];
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246 }
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247 sorted[length-1]->next = NULL;
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248
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249 UcxList *ret = sorted[0];
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250 free(sorted);
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251 return ret;
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252 }
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253
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254 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
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255 if (l == NULL) {
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256 return NULL;
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257 }
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258
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259 UcxList *lc;
254
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260 size_t ln = 1;
91
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261
254
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diff changeset
262 UcxList *ls = l, *le, *re;
99
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diff changeset
263
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diff changeset
264 // check how many elements are already sorted
91
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265 lc = ls;
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266 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
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267 lc = lc->next;
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268 ln++;
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269 }
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diff changeset
270 le = lc->next;
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diff changeset
271
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diff changeset
272 if (le == NULL) {
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273 return l; // this list is already sorted :)
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parents:
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274 } else {
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275 UcxList *rc;
254
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diff changeset
276 size_t rn = 1;
91
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277 rc = le;
99
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diff changeset
278 // skip already sorted elements
91
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diff changeset
279 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
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280 rc = rc->next;
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281 rn++;
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282 }
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283 re = rc->next;
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284
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285 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
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286 UcxList *sorted = ucx_list_sort_merge(ln+rn,
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287 ls, le, re,
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288 fnc, data);
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diff changeset
289
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diff changeset
290 // Something left? Sort it!
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diff changeset
291 size_t remainder_length = ucx_list_size(re);
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diff changeset
292 if (remainder_length > 0) {
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diff changeset
293 UcxList *remainder = ucx_list_sort(re, fnc, data);
91
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294
99
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diff changeset
295 // merge sorted list with (also sorted) remainder
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diff changeset
296 l = ucx_list_sort_merge(ln+rn+remainder_length,
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diff changeset
297 sorted, remainder, NULL, fnc, data);
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diff changeset
298 } else {
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diff changeset
299 // no remainder - we've got our sorted list
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diff changeset
300 l = sorted;
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diff changeset
301 }
91
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302
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parents:
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303 return l;
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parents:
diff changeset
304 }
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parents:
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305 }
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parents:
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306
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parents:
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307 UcxList *ucx_list_first(const UcxList *l) {
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parents:
diff changeset
308 if (!l) {
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parents:
diff changeset
309 return NULL;
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parents:
diff changeset
310 }
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parents:
diff changeset
311
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parents:
diff changeset
312 const UcxList *e = l;
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parents:
diff changeset
313 while (e->prev) {
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parents:
diff changeset
314 e = e->prev;
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parents:
diff changeset
315 }
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parents:
diff changeset
316 return (UcxList *)e;
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parents:
diff changeset
317 }
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parents:
diff changeset
318
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parents:
diff changeset
319 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
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parents:
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320 return ucx_list_remove_a(ucx_default_allocator(), l, e);
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parents:
diff changeset
321 }
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parents:
diff changeset
322
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parents:
diff changeset
323 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
99
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parents: 91
diff changeset
324 if (l == e) {
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parents: 91
diff changeset
325 l = e->next;
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diff changeset
326 }
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parents: 91
diff changeset
327
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parents: 91
diff changeset
328 if (e->next) {
91
fac51f87def0 ucx update
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329 e->next->prev = e->prev;
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330 }
99
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331
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332 if (e->prev) {
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333 e->prev->next = e->next;
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334 }
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335
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336 alfree(alloc, e);
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337 return l;
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338 }
260
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339
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340
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341 static UcxList* ucx_list_setoperation_a(UcxAllocator *allocator,
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342 UcxList const *left, UcxList const *right,
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343 cmp_func cmpfnc, void* cmpdata,
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344 copy_func cpfnc, void* cpdata,
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345 int op) {
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346
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347 UcxList *res = NULL;
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348 UcxList *cur = NULL;
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349 const UcxList *src = left;
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350
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351 do {
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352 UCX_FOREACH(node, src) {
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353 void* elem = node->data;
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354 if (
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355 (op == 0 && !ucx_list_contains(res, elem, cmpfnc, cmpdata)) ||
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356 (op == 1 && ucx_list_contains(right, elem, cmpfnc, cmpdata)) ||
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357 (op == 2 && !ucx_list_contains(right, elem, cmpfnc, cmpdata))) {
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358 UcxList *nl = almalloc(allocator, sizeof(UcxList));
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359 nl->prev = cur;
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360 nl->next = NULL;
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361 if (cpfnc) {
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362 nl->data = cpfnc(elem, cpdata);
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363 } else {
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364 nl->data = elem;
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365 }
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366 if (cur != NULL)
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367 cur->next = nl;
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368 cur = nl;
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369 if (res == NULL)
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370 res = cur;
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371 }
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372 }
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373 if (op == 0 && src == left)
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374 src = right;
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375 else
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376 src = NULL;
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377 } while (src != NULL);
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378
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379 return res;
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380 }
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381
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382 UcxList* ucx_list_union(UcxList const *left, UcxList const *right,
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383 cmp_func cmpfnc, void* cmpdata,
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384 copy_func cpfnc, void* cpdata) {
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385 return ucx_list_union_a(ucx_default_allocator(),
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386 left, right, cmpfnc, cmpdata, cpfnc, cpdata);
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387 }
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388
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389 UcxList* ucx_list_union_a(UcxAllocator *allocator,
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390 UcxList const *left, UcxList const *right,
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391 cmp_func cmpfnc, void* cmpdata,
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392 copy_func cpfnc, void* cpdata) {
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393
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394 return ucx_list_setoperation_a(allocator, left, right,
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395 cmpfnc, cmpdata, cpfnc, cpdata, 0);
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396 }
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397
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398 UcxList* ucx_list_intersection(UcxList const *left, UcxList const *right,
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399 cmp_func cmpfnc, void* cmpdata,
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400 copy_func cpfnc, void* cpdata) {
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401 return ucx_list_intersection_a(ucx_default_allocator(), left, right,
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402 cmpfnc, cmpdata, cpfnc, cpdata);
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403 }
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404
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405 UcxList* ucx_list_intersection_a(UcxAllocator *allocator,
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406 UcxList const *left, UcxList const *right,
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407 cmp_func cmpfnc, void* cmpdata,
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408 copy_func cpfnc, void* cpdata) {
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409
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410 return ucx_list_setoperation_a(allocator, left, right,
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411 cmpfnc, cmpdata, cpfnc, cpdata, 1);
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412 }
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413
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414 UcxList* ucx_list_difference(UcxList const *left, UcxList const *right,
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415 cmp_func cmpfnc, void* cmpdata,
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416 copy_func cpfnc, void* cpdata) {
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417 return ucx_list_difference_a(ucx_default_allocator(), left, right,
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418 cmpfnc, cmpdata, cpfnc, cpdata);
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419 }
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420
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421 UcxList* ucx_list_difference_a(UcxAllocator *allocator,
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422 UcxList const *left, UcxList const *right,
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423 cmp_func cmpfnc, void* cmpdata,
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424 copy_func cpfnc, void* cpdata) {
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425
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426 return ucx_list_setoperation_a(allocator, left, right,
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427 cmpfnc, cmpdata, cpfnc, cpdata, 2);
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428 }

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