src/ucx/list.c

Sat, 29 Oct 2016 20:33:46 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 29 Oct 2016 20:33:46 +0200
changeset 123
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parent 99
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child 135
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permissions
-rw-r--r--

fixes CGI response headers

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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 2015 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 "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 UcxList *ucx_list_append(UcxList *l, void *data) {
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80 return ucx_list_append_a(ucx_default_allocator(), l, data);
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81 }
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82
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83 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data) {
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84 UcxList *nl = (UcxList*) almalloc(alloc, sizeof(UcxList));
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85 if (!nl) {
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86 return NULL;
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87 }
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88
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89 nl->data = data;
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90 nl->next = NULL;
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91 if (l) {
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92 UcxList *t = ucx_list_last(l);
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93 t->next = nl;
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94 nl->prev = t;
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95 return l;
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96 } else {
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97 nl->prev = NULL;
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98 return nl;
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99 }
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100 }
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101
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102 UcxList *ucx_list_prepend(UcxList *l, void *data) {
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103 return ucx_list_prepend_a(ucx_default_allocator(), l, data);
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104 }
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105
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106 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
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107 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
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108 if (!nl) {
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109 return NULL;
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110 }
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111 l = ucx_list_first(l);
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112
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113 if (l) {
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114 nl->next = l;
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115 l->prev = nl;
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116 }
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117 return nl;
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118 }
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119
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120 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
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121 if (l1) {
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122 UcxList *last = ucx_list_last(l1);
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123 last->next = l2;
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124 if (l2) {
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125 l2->prev = last;
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126 }
91
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127 return l1;
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128 } else {
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129 return l2;
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130 }
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131 }
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132
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133 UcxList *ucx_list_last(const UcxList *l) {
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134 if (l == NULL) return NULL;
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135
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136 const UcxList *e = l;
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137 while (e->next != NULL) {
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138 e = e->next;
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139 }
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140 return (UcxList*)e;
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141 }
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142
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143 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
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144 ssize_t index = 0;
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145 while (list) {
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146 if (list == elem) {
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147 return index;
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148 }
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149 list = list->next;
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150 index++;
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151 }
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152 return -1;
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153 }
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154
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155 UcxList *ucx_list_get(const UcxList *l, size_t index) {
91
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156 if (l == NULL) return NULL;
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157
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158 const UcxList *e = l;
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159 while (e->next && index > 0) {
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160 e = e->next;
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161 index--;
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162 }
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163
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parents:
diff changeset
164 return (UcxList*)(index == 0 ? e : NULL);
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parents:
diff changeset
165 }
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parents:
diff changeset
166
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parents:
diff changeset
167 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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parents:
diff changeset
168 ssize_t index = 0;
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parents:
diff changeset
169 UCX_FOREACH(e, l) {
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parents:
diff changeset
170 if (fnc) {
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parents:
diff changeset
171 if (fnc(elem, e->data, cmpdata) == 0) {
fac51f87def0 ucx update
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parents:
diff changeset
172 return index;
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parents:
diff changeset
173 }
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parents:
diff changeset
174 } else {
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parents:
diff changeset
175 if (elem == e->data) {
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parents:
diff changeset
176 return index;
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parents:
diff changeset
177 }
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parents:
diff changeset
178 }
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parents:
diff changeset
179 index++;
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parents:
diff changeset
180 }
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parents:
diff changeset
181 return -1;
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parents:
diff changeset
182 }
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parents:
diff changeset
183
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parents:
diff changeset
184 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
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185 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
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parents:
diff changeset
186 }
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parents:
diff changeset
187
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parents:
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188 size_t ucx_list_size(const UcxList *l) {
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parents:
diff changeset
189 if (l == NULL) return 0;
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parents:
diff changeset
190
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parents:
diff changeset
191 const UcxList *e = l;
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parents:
diff changeset
192 size_t s = 1;
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parents:
diff changeset
193 while (e->next != NULL) {
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194 e = e->next;
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parents:
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195 s++;
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parents:
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196 }
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parents:
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197
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parents:
diff changeset
198 return s;
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parents:
diff changeset
199 }
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parents:
diff changeset
200
99
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parents: 91
diff changeset
201 static UcxList *ucx_list_sort_merge(int length,
91
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parents:
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202 UcxList* restrict ls, UcxList* restrict le, UcxList* restrict re,
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parents:
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203 cmp_func fnc, void* data) {
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parents:
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204
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parents:
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205 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
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parents:
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206 UcxList *rc, *lc;
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parents:
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207
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diff changeset
208 lc = ls; rc = le;
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parents:
diff changeset
209 int n = 0;
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parents:
diff changeset
210 while (lc && lc != le && rc != re) {
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parents:
diff changeset
211 if (fnc(lc->data, rc->data, data) <= 0) {
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parents:
diff changeset
212 sorted[n] = lc;
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parents:
diff changeset
213 lc = lc->next;
fac51f87def0 ucx update
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parents:
diff changeset
214 } else {
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parents:
diff changeset
215 sorted[n] = rc;
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parents:
diff changeset
216 rc = rc->next;
fac51f87def0 ucx update
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parents:
diff changeset
217 }
fac51f87def0 ucx update
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parents:
diff changeset
218 n++;
fac51f87def0 ucx update
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parents:
diff changeset
219 }
fac51f87def0 ucx update
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parents:
diff changeset
220 while (lc && lc != le) {
fac51f87def0 ucx update
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parents:
diff changeset
221 sorted[n] = lc;
fac51f87def0 ucx update
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parents:
diff changeset
222 lc = lc->next;
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parents:
diff changeset
223 n++;
fac51f87def0 ucx update
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parents:
diff changeset
224 }
fac51f87def0 ucx update
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parents:
diff changeset
225 while (rc && rc != re) {
fac51f87def0 ucx update
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parents:
diff changeset
226 sorted[n] = rc;
fac51f87def0 ucx update
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parents:
diff changeset
227 rc = rc->next;
fac51f87def0 ucx update
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parents:
diff changeset
228 n++;
fac51f87def0 ucx update
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parents:
diff changeset
229 }
fac51f87def0 ucx update
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parents:
diff changeset
230
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
231 // Update pointer
fac51f87def0 ucx update
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parents:
diff changeset
232 sorted[0]->prev = NULL;
fac51f87def0 ucx update
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parents:
diff changeset
233 for (int i = 0 ; i < length-1 ; i++) {
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parents:
diff changeset
234 sorted[i]->next = sorted[i+1];
fac51f87def0 ucx update
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parents:
diff changeset
235 sorted[i+1]->prev = sorted[i];
fac51f87def0 ucx update
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parents:
diff changeset
236 }
fac51f87def0 ucx update
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parents:
diff changeset
237 sorted[length-1]->next = NULL;
fac51f87def0 ucx update
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parents:
diff changeset
238
fac51f87def0 ucx update
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parents:
diff changeset
239 UcxList *ret = sorted[0];
fac51f87def0 ucx update
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parents:
diff changeset
240 free(sorted);
fac51f87def0 ucx update
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parents:
diff changeset
241 return ret;
fac51f87def0 ucx update
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parents:
diff changeset
242 }
fac51f87def0 ucx update
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parents:
diff changeset
243
fac51f87def0 ucx update
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parents:
diff changeset
244 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
fac51f87def0 ucx update
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parents:
diff changeset
245 if (l == NULL) {
fac51f87def0 ucx update
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parents:
diff changeset
246 return NULL;
fac51f87def0 ucx update
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parents:
diff changeset
247 }
fac51f87def0 ucx update
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parents:
diff changeset
248
fac51f87def0 ucx update
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parents:
diff changeset
249 UcxList *lc;
fac51f87def0 ucx update
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parents:
diff changeset
250 int ln = 1;
fac51f87def0 ucx update
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parents:
diff changeset
251
fac51f87def0 ucx update
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parents:
diff changeset
252 UcxList *restrict ls = l, *restrict le, *restrict re;
99
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parents: 91
diff changeset
253
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parents: 91
diff changeset
254 // check how many elements are already sorted
91
fac51f87def0 ucx update
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parents:
diff changeset
255 lc = ls;
fac51f87def0 ucx update
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parents:
diff changeset
256 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
fac51f87def0 ucx update
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parents:
diff changeset
257 lc = lc->next;
fac51f87def0 ucx update
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parents:
diff changeset
258 ln++;
fac51f87def0 ucx update
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parents:
diff changeset
259 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
260 le = lc->next;
fac51f87def0 ucx update
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parents:
diff changeset
261
fac51f87def0 ucx update
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parents:
diff changeset
262 if (le == NULL) {
fac51f87def0 ucx update
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parents:
diff changeset
263 return l; // this list is already sorted :)
fac51f87def0 ucx update
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parents:
diff changeset
264 } else {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
265 UcxList *rc;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
266 int rn = 1;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
267 rc = le;
99
b9a6af0ae41a ucx update
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parents: 91
diff changeset
268 // skip already sorted elements
91
fac51f87def0 ucx update
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parents:
diff changeset
269 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
270 rc = rc->next;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
271 rn++;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
272 }
fac51f87def0 ucx update
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parents:
diff changeset
273 re = rc->next;
fac51f87def0 ucx update
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parents:
diff changeset
274
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
275 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
276 UcxList *sorted = ucx_list_sort_merge(ln+rn,
fac51f87def0 ucx update
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parents:
diff changeset
277 ls, le, re,
fac51f87def0 ucx update
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parents:
diff changeset
278 fnc, data);
99
b9a6af0ae41a ucx update
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parents: 91
diff changeset
279
b9a6af0ae41a ucx update
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parents: 91
diff changeset
280 // Something left? Sort it!
b9a6af0ae41a ucx update
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parents: 91
diff changeset
281 size_t remainder_length = ucx_list_size(re);
b9a6af0ae41a ucx update
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parents: 91
diff changeset
282 if (remainder_length > 0) {
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
283 UcxList *remainder = ucx_list_sort(re, fnc, data);
91
fac51f87def0 ucx update
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parents:
diff changeset
284
99
b9a6af0ae41a ucx update
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parents: 91
diff changeset
285 // merge sorted list with (also sorted) remainder
b9a6af0ae41a ucx update
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parents: 91
diff changeset
286 l = ucx_list_sort_merge(ln+rn+remainder_length,
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
287 sorted, remainder, NULL, fnc, data);
b9a6af0ae41a ucx update
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parents: 91
diff changeset
288 } else {
b9a6af0ae41a ucx update
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parents: 91
diff changeset
289 // no remainder - we've got our sorted list
b9a6af0ae41a ucx update
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parents: 91
diff changeset
290 l = sorted;
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
291 }
91
fac51f87def0 ucx update
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parents:
diff changeset
292
fac51f87def0 ucx update
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parents:
diff changeset
293 return l;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
294 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
295 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
296
fac51f87def0 ucx update
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parents:
diff changeset
297 UcxList *ucx_list_first(const UcxList *l) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
298 if (!l) {
fac51f87def0 ucx update
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parents:
diff changeset
299 return NULL;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
300 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
301
fac51f87def0 ucx update
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parents:
diff changeset
302 const UcxList *e = l;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
303 while (e->prev) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
304 e = e->prev;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
305 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
306 return (UcxList *)e;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
307 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
308
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
309 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
310 return ucx_list_remove_a(ucx_default_allocator(), l, e);
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
311 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
312
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
313 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
99
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
314 if (l == e) {
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
315 l = e->next;
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
316 }
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
317
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
318 if (e->next) {
91
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
319 e->next->prev = e->prev;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
320 }
99
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
321
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
322 if (e->prev) {
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
323 e->prev->next = e->next;
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
324 }
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
325
b9a6af0ae41a ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 91
diff changeset
326 alfree(alloc, e);
91
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
327 return l;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
328 }

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