ucx/list.c

Sun, 15 Dec 2019 18:08:14 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 15 Dec 2019 18:08:14 +0100
changeset 707
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parent 505
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child 747
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permissions
-rw-r--r--

change version to 1.3.0

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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(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, 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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diff changeset
163 UcxList *ucx_list_get(const UcxList *l, size_t index) {
1
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164 if (l == NULL) return NULL;
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165
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166 const UcxList *e = l;
5
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diff changeset
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
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175 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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176 ssize_t index = 0;
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177 UCX_FOREACH(e, l) {
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178 if (fnc) {
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179 if (fnc(elem, e->data, cmpdata) == 0) {
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180 return index;
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181 }
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182 } else {
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183 if (elem == e->data) {
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184 return index;
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185 }
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186 }
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187 index++;
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188 }
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189 return -1;
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190 }
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191
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192 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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193 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
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194 }
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195
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196 size_t ucx_list_size(const UcxList *l) {
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197 if (l == NULL) return 0;
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198
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199 const UcxList *e = l;
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200 size_t s = 1;
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201 while (e->next != NULL) {
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202 e = e->next;
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203 s++;
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204 }
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205
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206 return s;
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207 }
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208
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209 static UcxList *ucx_list_sort_merge(int length,
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210 UcxList* ls, UcxList* le, UcxList* re,
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211 cmp_func fnc, void* data) {
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212
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213 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
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214 UcxList *rc, *lc;
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215
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216 lc = ls; rc = le;
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217 int n = 0;
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218 while (lc && lc != le && rc != re) {
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219 if (fnc(lc->data, rc->data, data) <= 0) {
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220 sorted[n] = lc;
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221 lc = lc->next;
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222 } else {
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223 sorted[n] = rc;
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224 rc = rc->next;
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225 }
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226 n++;
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227 }
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228 while (lc && lc != le) {
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229 sorted[n] = lc;
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230 lc = lc->next;
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231 n++;
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232 }
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233 while (rc && rc != re) {
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234 sorted[n] = rc;
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235 rc = rc->next;
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236 n++;
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237 }
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238
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239 // Update pointer
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240 sorted[0]->prev = NULL;
1
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241 for (int i = 0 ; i < length-1 ; i++) {
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242 sorted[i]->next = sorted[i+1];
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243 sorted[i+1]->prev = sorted[i];
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244 }
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245 sorted[length-1]->next = NULL;
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246
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247 UcxList *ret = sorted[0];
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248 free(sorted);
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249 return ret;
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250 }
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251
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252 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
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253 if (l == NULL) {
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254 return NULL;
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255 }
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256
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257 UcxList *lc;
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258 int ln = 1;
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259
335
c1bc13faadaa updates ucx to version 1.0
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diff changeset
260 UcxList *ls = l, *le, *re;
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261
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262 // check how many elements are already sorted
1
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263 lc = ls;
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264 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
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265 lc = lc->next;
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266 ln++;
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267 }
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268 le = lc->next;
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269
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270 if (le == NULL) {
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271 return l; // this list is already sorted :)
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272 } else {
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273 UcxList *rc;
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274 int rn = 1;
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275 rc = le;
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276 // skip already sorted elements
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277 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
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278 rc = rc->next;
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279 rn++;
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280 }
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281 re = rc->next;
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282
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283 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
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284 UcxList *sorted = ucx_list_sort_merge(ln+rn,
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285 ls, le, re,
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286 fnc, data);
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287
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288 // Something left? Sort it!
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289 size_t remainder_length = ucx_list_size(re);
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290 if (remainder_length > 0) {
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diff changeset
291 UcxList *remainder = ucx_list_sort(re, fnc, data);
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292
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293 // merge sorted list with (also sorted) remainder
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294 l = ucx_list_sort_merge(ln+rn+remainder_length,
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diff changeset
295 sorted, remainder, NULL, fnc, data);
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diff changeset
296 } else {
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diff changeset
297 // no remainder - we've got our sorted list
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298 l = sorted;
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diff changeset
299 }
1
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300
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301 return l;
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302 }
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303 }
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304
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305 UcxList *ucx_list_first(const UcxList *l) {
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306 if (!l) {
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307 return NULL;
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308 }
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309
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310 const UcxList *e = l;
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311 while (e->prev) {
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312 e = e->prev;
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313 }
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314 return (UcxList *)e;
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315 }
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316
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317 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
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318 return ucx_list_remove_a(ucx_default_allocator(), l, e);
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319 }
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320
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321 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
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322 if (l == e) {
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323 l = e->next;
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324 }
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325
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326 if (e->next) {
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327 e->next->prev = e->prev;
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328 }
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329
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330 if (e->prev) {
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331 e->prev->next = e->next;
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332 }
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333
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334 alfree(alloc, e);
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335 return l;
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336 }

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