ucx/list.c

Tue, 29 May 2018 20:15:09 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 29 May 2018 20:15:09 +0200
changeset 380
8a0c727aa409
parent 335
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child 505
481802342fdf
permissions
-rw-r--r--

adds tag filter for dav-sync pull

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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 while (list != NULL) {
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81 destr(list->data);
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82 list = list->next;
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83 }
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84 }
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85
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86 UcxList *ucx_list_append(UcxList *l, void *data) {
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87 return ucx_list_append_a(ucx_default_allocator(), l, data);
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88 }
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89
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90 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data) {
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91 UcxList *nl = (UcxList*) almalloc(alloc, sizeof(UcxList));
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92 if (!nl) {
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93 return NULL;
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94 }
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95
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96 nl->data = data;
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97 nl->next = NULL;
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98 if (l) {
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99 UcxList *t = ucx_list_last(l);
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100 t->next = nl;
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101 nl->prev = t;
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102 return l;
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103 } else {
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104 nl->prev = NULL;
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105 return nl;
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106 }
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107 }
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108
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109 UcxList *ucx_list_append_once(UcxList *l, void *data,
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110 cmp_func cmpfnc, void *cmpdata) {
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111 return ucx_list_append_once_a(ucx_default_allocator(), l,
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112 data, cmpfnc, cmpdata);
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113 }
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114
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115 UcxList *ucx_list_append_once_a(UcxAllocator *alloc, UcxList *l, void *data,
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116 cmp_func cmpfnc, void *cmpdata) {
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117
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118 UcxList *last = NULL;
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119 {
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120 UcxList *e = l;
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121 while (e) {
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122 if (cmpfnc(e->data, data, cmpdata) == 0) {
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123 return l;
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124 }
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125 last = e;
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126 e = e->next;
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127 }
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128 }
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129
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130 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
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131 if (!nl) {
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132 return NULL;
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133 }
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134
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135 if (last == NULL) {
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136 return nl;
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137 } else {
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138 nl->prev = last;
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139 last->next = nl;
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140 return l;
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141 }
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142 }
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143
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144 UcxList *ucx_list_prepend(UcxList *l, void *data) {
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145 return ucx_list_prepend_a(ucx_default_allocator(), l, data);
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146 }
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diff changeset
147
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diff changeset
148 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
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149 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
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diff changeset
150 if (!nl) {
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diff changeset
151 return NULL;
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diff changeset
152 }
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diff changeset
153 l = ucx_list_first(l);
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154
5
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diff changeset
155 if (l) {
1
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156 nl->next = l;
5
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diff changeset
157 l->prev = nl;
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158 }
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159 return nl;
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160 }
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161
5
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162 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
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diff changeset
163 if (l1) {
1
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164 UcxList *last = ucx_list_last(l1);
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165 last->next = l2;
70
88092b88ec00 ucx update
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diff changeset
166 if (l2) {
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diff changeset
167 l2->prev = last;
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168 }
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169 return l1;
5
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170 } else {
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171 return l2;
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172 }
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173 }
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174
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175 UcxList *ucx_list_last(const UcxList *l) {
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176 if (l == NULL) return NULL;
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177
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178 const UcxList *e = l;
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179 while (e->next != NULL) {
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180 e = e->next;
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181 }
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182 return (UcxList*)e;
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183 }
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184
5
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185 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
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186 ssize_t index = 0;
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187 while (list) {
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188 if (list == elem) {
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189 return index;
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190 }
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191 list = list->next;
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192 index++;
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193 }
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194 return -1;
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195 }
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196
70
88092b88ec00 ucx update
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diff changeset
197 UcxList *ucx_list_get(const UcxList *l, size_t index) {
1
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198 if (l == NULL) return NULL;
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199
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200 const UcxList *e = l;
5
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diff changeset
201 while (e->next && index > 0) {
1
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202 e = e->next;
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203 index--;
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204 }
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205
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206 return (UcxList*)(index == 0 ? e : NULL);
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207 }
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208
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209 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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210 ssize_t index = 0;
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211 UCX_FOREACH(e, l) {
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212 if (fnc) {
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213 if (fnc(elem, e->data, cmpdata) == 0) {
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214 return index;
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215 }
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216 } else {
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diff changeset
217 if (elem == e->data) {
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218 return index;
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219 }
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220 }
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diff changeset
221 index++;
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222 }
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223 return -1;
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parents: 1
diff changeset
224 }
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diff changeset
225
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diff changeset
226 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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227 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
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diff changeset
228 }
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diff changeset
229
1
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230 size_t ucx_list_size(const UcxList *l) {
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231 if (l == NULL) return 0;
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232
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233 const UcxList *e = l;
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diff changeset
234 size_t s = 1;
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diff changeset
235 while (e->next != NULL) {
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236 e = e->next;
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237 s++;
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238 }
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239
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240 return s;
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parents:
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241 }
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242
70
88092b88ec00 ucx update
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diff changeset
243 static UcxList *ucx_list_sort_merge(int length,
335
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parents: 256
diff changeset
244 UcxList* ls, UcxList* le, UcxList* re,
1
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245 cmp_func fnc, void* data) {
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246
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diff changeset
247 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
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248 UcxList *rc, *lc;
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249
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250 lc = ls; rc = le;
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diff changeset
251 int n = 0;
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parents:
diff changeset
252 while (lc && lc != le && rc != re) {
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diff changeset
253 if (fnc(lc->data, rc->data, data) <= 0) {
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diff changeset
254 sorted[n] = lc;
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diff changeset
255 lc = lc->next;
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parents:
diff changeset
256 } else {
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diff changeset
257 sorted[n] = rc;
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diff changeset
258 rc = rc->next;
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259 }
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diff changeset
260 n++;
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261 }
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parents:
diff changeset
262 while (lc && lc != le) {
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263 sorted[n] = lc;
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diff changeset
264 lc = lc->next;
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265 n++;
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266 }
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diff changeset
267 while (rc && rc != re) {
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268 sorted[n] = rc;
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269 rc = rc->next;
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270 n++;
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271 }
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272
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273 // Update pointer
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diff changeset
274 sorted[0]->prev = NULL;
1
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diff changeset
275 for (int i = 0 ; i < length-1 ; i++) {
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276 sorted[i]->next = sorted[i+1];
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diff changeset
277 sorted[i+1]->prev = sorted[i];
1
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278 }
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279 sorted[length-1]->next = NULL;
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280
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diff changeset
281 UcxList *ret = sorted[0];
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282 free(sorted);
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283 return ret;
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parents:
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284 }
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285
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286 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
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diff changeset
287 if (l == NULL) {
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288 return NULL;
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289 }
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290
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291 UcxList *lc;
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parents:
diff changeset
292 int ln = 1;
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diff changeset
293
335
c1bc13faadaa updates ucx to version 1.0
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diff changeset
294 UcxList *ls = l, *le, *re;
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295
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diff changeset
296 // check how many elements are already sorted
1
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297 lc = ls;
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diff changeset
298 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
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299 lc = lc->next;
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300 ln++;
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301 }
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302 le = lc->next;
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303
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304 if (le == NULL) {
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305 return l; // this list is already sorted :)
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306 } else {
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307 UcxList *rc;
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308 int rn = 1;
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309 rc = le;
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310 // skip already sorted elements
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311 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
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312 rc = rc->next;
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313 rn++;
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314 }
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315 re = rc->next;
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316
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317 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
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318 UcxList *sorted = ucx_list_sort_merge(ln+rn,
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319 ls, le, re,
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320 fnc, data);
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321
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322 // Something left? Sort it!
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323 size_t remainder_length = ucx_list_size(re);
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324 if (remainder_length > 0) {
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325 UcxList *remainder = ucx_list_sort(re, fnc, data);
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326
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327 // merge sorted list with (also sorted) remainder
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328 l = ucx_list_sort_merge(ln+rn+remainder_length,
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329 sorted, remainder, NULL, fnc, data);
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330 } else {
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331 // no remainder - we've got our sorted list
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332 l = sorted;
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333 }
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334
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335 return l;
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336 }
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337 }
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338
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339 UcxList *ucx_list_first(const UcxList *l) {
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340 if (!l) {
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341 return NULL;
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342 }
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343
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344 const UcxList *e = l;
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345 while (e->prev) {
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346 e = e->prev;
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347 }
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348 return (UcxList *)e;
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349 }
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350
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351 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
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352 return ucx_list_remove_a(ucx_default_allocator(), l, e);
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353 }
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354
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355 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
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356 if (l == e) {
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357 l = e->next;
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358 }
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359
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360 if (e->next) {
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361 e->next->prev = e->prev;
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362 }
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363
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364 if (e->prev) {
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365 e->prev->next = e->next;
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366 }
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367
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368 alfree(alloc, e);
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369 return l;
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370 }

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