src/ucx/map.c

Sun, 07 Aug 2022 13:46:43 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 07 Aug 2022 13:46:43 +0200
branch
webdav
changeset 366
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parent 260
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permissions
-rw-r--r--

add new dav config element

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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/map.h"
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30
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31 #include <stdlib.h>
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32 #include <string.h>
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33
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34 UcxMap *ucx_map_new(size_t size) {
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35 return ucx_map_new_a(NULL, size);
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36 }
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37
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38 UcxMap *ucx_map_new_a(UcxAllocator *allocator, size_t size) {
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39 if(size == 0) {
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40 size = 16;
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41 }
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42
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43 if(!allocator) {
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44 allocator = ucx_default_allocator();
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45 }
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46
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47 UcxMap *map = (UcxMap*)almalloc(allocator, sizeof(UcxMap));
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48 if (!map) {
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49 return NULL;
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50 }
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51
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52 map->allocator = allocator;
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53 map->map = (UcxMapElement**)alcalloc(
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54 allocator, size, sizeof(UcxMapElement*));
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55 if(map->map == NULL) {
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56 alfree(allocator, map);
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57 return NULL;
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58 }
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59 map->size = size;
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60 map->count = 0;
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61
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62 return map;
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63 }
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64
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65 static void ucx_map_free_elmlist_contents(UcxMap *map) {
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66 for (size_t n = 0 ; n < map->size ; n++) {
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67 UcxMapElement *elem = map->map[n];
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68 if (elem != NULL) {
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69 do {
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70 UcxMapElement *next = elem->next;
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71 alfree(map->allocator, elem->key.data);
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72 alfree(map->allocator, elem);
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73 elem = next;
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74 } while (elem != NULL);
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75 }
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76 }
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77 }
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78
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79 void ucx_map_free(UcxMap *map) {
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80 ucx_map_free_elmlist_contents(map);
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81 alfree(map->allocator, map->map);
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82 alfree(map->allocator, map);
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83 }
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84
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85 void ucx_map_free_content(UcxMap *map, ucx_destructor destr) {
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86 UcxMapIterator iter = ucx_map_iterator(map);
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87 void *val;
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88 UCX_MAP_FOREACH(key, val, iter) {
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89 if (destr) {
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90 destr(val);
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91 } else {
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92 alfree(map->allocator, val);
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93 }
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94 }
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95 }
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96
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97 void ucx_map_clear(UcxMap *map) {
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98 if (map->count == 0) {
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99 return; // nothing to do
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100 }
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101 ucx_map_free_elmlist_contents(map);
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102 memset(map->map, 0, map->size*sizeof(UcxMapElement*));
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103 map->count = 0;
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104 }
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105
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106 int ucx_map_copy(UcxMap const *from, UcxMap *to, copy_func fnc, void *data) {
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107 UcxMapIterator i = ucx_map_iterator(from);
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108 void *value;
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109 UCX_MAP_FOREACH(key, value, i) {
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110 if (ucx_map_put(to, key, fnc ? fnc(value, data) : value)) {
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111 return 1;
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112 }
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113 }
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114 return 0;
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115 }
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116
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117 UcxMap *ucx_map_clone(UcxMap const *map, copy_func fnc, void *data) {
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118 return ucx_map_clone_a(ucx_default_allocator(), map, fnc, data);
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119 }
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120
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121 UcxMap *ucx_map_clone_a(UcxAllocator *allocator,
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122 UcxMap const *map, copy_func fnc, void *data) {
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123 size_t bs = (map->count * 5) >> 1;
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124 UcxMap *newmap = ucx_map_new_a(allocator, bs > map->size ? bs : map->size);
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125 if (!newmap) {
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126 return NULL;
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127 }
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128 ucx_map_copy(map, newmap, fnc, data);
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129 return newmap;
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130 }
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131
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132 int ucx_map_rehash(UcxMap *map) {
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133 size_t load = (map->size * 3) >> 2;
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134 if (map->count > load) {
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135 UcxMap oldmap;
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136 oldmap.map = map->map;
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137 oldmap.size = map->size;
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138 oldmap.count = map->count;
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139 oldmap.allocator = map->allocator;
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140
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141 map->size = (map->count * 5) >> 1;
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142 map->map = (UcxMapElement**)alcalloc(
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143 map->allocator, map->size, sizeof(UcxMapElement*));
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144 if (!map->map) {
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145 *map = oldmap;
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146 return 1;
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147 }
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148 map->count = 0;
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149 ucx_map_copy(&oldmap, map, NULL, NULL);
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150
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151 /* free the UcxMapElement list of oldmap */
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152 ucx_map_free_elmlist_contents(&oldmap);
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153 alfree(map->allocator, oldmap.map);
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154 }
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155 return 0;
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156 }
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157
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158 int ucx_map_put(UcxMap *map, UcxKey key, void *data) {
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parents:
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159 UcxAllocator *allocator = map->allocator;
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diff changeset
160
fac51f87def0 ucx update
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parents:
diff changeset
161 if (key.hash == 0) {
254
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parents: 135
diff changeset
162 key.hash = ucx_hash((const char*)key.data, key.len);
91
fac51f87def0 ucx update
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163 }
254
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diff changeset
164
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diff changeset
165 struct UcxMapKey mapkey;
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diff changeset
166 mapkey.hash = key.hash;
91
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167
254
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parents: 135
diff changeset
168 size_t slot = mapkey.hash%map->size;
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diff changeset
169 UcxMapElement *elm = map->map[slot];
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diff changeset
170 UcxMapElement *prev = NULL;
91
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171
254
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parents: 135
diff changeset
172 while (elm && elm->key.hash < mapkey.hash) {
91
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173 prev = elm;
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parents:
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174 elm = elm->next;
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parents:
diff changeset
175 }
fac51f87def0 ucx update
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176
254
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diff changeset
177 if (!elm || elm->key.hash != mapkey.hash) {
99
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parents: 91
diff changeset
178 UcxMapElement *e = (UcxMapElement*)almalloc(
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parents: 91
diff changeset
179 allocator, sizeof(UcxMapElement));
91
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180 if (!e) {
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181 return -1;
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182 }
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183 e->key.data = NULL;
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184 if (prev) {
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185 prev->next = e;
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parents:
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186 } else {
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187 map->map[slot] = e;
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188 }
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189 e->next = elm;
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190 elm = e;
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191 }
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192
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193 if (!elm->key.data) {
99
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parents: 91
diff changeset
194 void *kd = almalloc(allocator, key.len);
91
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195 if (!kd) {
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196 return -1;
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197 }
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198 memcpy(kd, key.data, key.len);
254
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diff changeset
199 mapkey.data = kd;
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diff changeset
200 mapkey.len = key.len;
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diff changeset
201 elm->key = mapkey;
91
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202 map->count++;
fac51f87def0 ucx update
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parents:
diff changeset
203 }
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204 elm->data = data;
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205
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parents:
diff changeset
206 return 0;
fac51f87def0 ucx update
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parents:
diff changeset
207 }
fac51f87def0 ucx update
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parents:
diff changeset
208
254
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diff changeset
209 static void* ucx_map_get_and_remove(UcxMap *map, UcxKey key, int remove) {
91
fac51f87def0 ucx update
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parents:
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210 if(key.hash == 0) {
254
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diff changeset
211 key.hash = ucx_hash((const char*)key.data, key.len);
91
fac51f87def0 ucx update
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parents:
diff changeset
212 }
fac51f87def0 ucx update
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parents:
diff changeset
213
fac51f87def0 ucx update
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parents:
diff changeset
214 size_t slot = key.hash%map->size;
254
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diff changeset
215 UcxMapElement *elm = map->map[slot];
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diff changeset
216 UcxMapElement *pelm = NULL;
91
fac51f87def0 ucx update
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parents:
diff changeset
217 while (elm && elm->key.hash <= key.hash) {
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diff changeset
218 if(elm->key.hash == key.hash) {
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parents:
diff changeset
219 int n = (key.len > elm->key.len) ? elm->key.len : key.len;
fac51f87def0 ucx update
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parents:
diff changeset
220 if (memcmp(elm->key.data, key.data, n) == 0) {
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parents:
diff changeset
221 void *data = elm->data;
fac51f87def0 ucx update
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parents:
diff changeset
222 if (remove) {
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parents:
diff changeset
223 if (pelm) {
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parents:
diff changeset
224 pelm->next = elm->next;
fac51f87def0 ucx update
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parents:
diff changeset
225 } else {
fac51f87def0 ucx update
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parents:
diff changeset
226 map->map[slot] = elm->next;
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parents:
diff changeset
227 }
99
b9a6af0ae41a ucx update
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parents: 91
diff changeset
228 alfree(map->allocator, elm->key.data);
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parents: 91
diff changeset
229 alfree(map->allocator, elm);
91
fac51f87def0 ucx update
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parents:
diff changeset
230 map->count--;
fac51f87def0 ucx update
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parents:
diff changeset
231 }
fac51f87def0 ucx update
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parents:
diff changeset
232
fac51f87def0 ucx update
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parents:
diff changeset
233 return data;
fac51f87def0 ucx update
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parents:
diff changeset
234 }
fac51f87def0 ucx update
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parents:
diff changeset
235 }
fac51f87def0 ucx update
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parents:
diff changeset
236 pelm = elm;
fac51f87def0 ucx update
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parents:
diff changeset
237 elm = pelm->next;
fac51f87def0 ucx update
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parents:
diff changeset
238 }
fac51f87def0 ucx update
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parents:
diff changeset
239
fac51f87def0 ucx update
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parents:
diff changeset
240 return NULL;
fac51f87def0 ucx update
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parents:
diff changeset
241 }
fac51f87def0 ucx update
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parents:
diff changeset
242
260
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parents: 254
diff changeset
243 void *ucx_map_get(UcxMap const *map, UcxKey key) {
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parents: 254
diff changeset
244 return ucx_map_get_and_remove((UcxMap *)map, key, 0);
91
fac51f87def0 ucx update
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parents:
diff changeset
245 }
fac51f87def0 ucx update
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parents:
diff changeset
246
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parents:
diff changeset
247 void *ucx_map_remove(UcxMap *map, UcxKey key) {
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parents:
diff changeset
248 return ucx_map_get_and_remove(map, key, 1);
fac51f87def0 ucx update
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parents:
diff changeset
249 }
fac51f87def0 ucx update
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parents:
diff changeset
250
254
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parents: 135
diff changeset
251 UcxKey ucx_key(const void *data, size_t len) {
91
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parents:
diff changeset
252 UcxKey key;
fac51f87def0 ucx update
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parents:
diff changeset
253 key.data = data;
fac51f87def0 ucx update
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parents:
diff changeset
254 key.len = len;
254
4784c14aa639 ucx update
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parents: 135
diff changeset
255 key.hash = ucx_hash((const char*)data, len);
91
fac51f87def0 ucx update
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parents:
diff changeset
256 return key;
fac51f87def0 ucx update
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parents:
diff changeset
257 }
fac51f87def0 ucx update
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parents:
diff changeset
258
fac51f87def0 ucx update
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parents:
diff changeset
259
fac51f87def0 ucx update
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parents:
diff changeset
260 int ucx_hash(const char *data, size_t len) {
fac51f87def0 ucx update
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parents:
diff changeset
261 /* murmur hash 2 */
fac51f87def0 ucx update
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parents:
diff changeset
262
fac51f87def0 ucx update
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parents:
diff changeset
263 int m = 0x5bd1e995;
fac51f87def0 ucx update
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parents:
diff changeset
264 int r = 24;
fac51f87def0 ucx update
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parents:
diff changeset
265
fac51f87def0 ucx update
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parents:
diff changeset
266 int h = 25 ^ len;
fac51f87def0 ucx update
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parents:
diff changeset
267
fac51f87def0 ucx update
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parents:
diff changeset
268 int i = 0;
fac51f87def0 ucx update
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parents:
diff changeset
269 while (len >= 4) {
fac51f87def0 ucx update
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parents:
diff changeset
270 int k = data[i + 0] & 0xFF;
fac51f87def0 ucx update
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parents:
diff changeset
271 k |= (data[i + 1] & 0xFF) << 8;
fac51f87def0 ucx update
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parents:
diff changeset
272 k |= (data[i + 2] & 0xFF) << 16;
fac51f87def0 ucx update
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parents:
diff changeset
273 k |= (data[i + 3] & 0xFF) << 24;
fac51f87def0 ucx update
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parents:
diff changeset
274
fac51f87def0 ucx update
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parents:
diff changeset
275 k *= m;
fac51f87def0 ucx update
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parents:
diff changeset
276 k ^= k >> r;
fac51f87def0 ucx update
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parents:
diff changeset
277 k *= m;
fac51f87def0 ucx update
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parents:
diff changeset
278
fac51f87def0 ucx update
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parents:
diff changeset
279 h *= m;
fac51f87def0 ucx update
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parents:
diff changeset
280 h ^= k;
fac51f87def0 ucx update
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parents:
diff changeset
281
fac51f87def0 ucx update
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parents:
diff changeset
282 i += 4;
fac51f87def0 ucx update
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parents:
diff changeset
283 len -= 4;
fac51f87def0 ucx update
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parents:
diff changeset
284 }
fac51f87def0 ucx update
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parents:
diff changeset
285
fac51f87def0 ucx update
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parents:
diff changeset
286 switch (len) {
fac51f87def0 ucx update
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parents:
diff changeset
287 case 3: h ^= (data[i + 2] & 0xFF) << 16;
fac51f87def0 ucx update
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parents:
diff changeset
288 /* no break */
fac51f87def0 ucx update
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parents:
diff changeset
289 case 2: h ^= (data[i + 1] & 0xFF) << 8;
fac51f87def0 ucx update
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parents:
diff changeset
290 /* no break */
fac51f87def0 ucx update
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parents:
diff changeset
291 case 1: h ^= (data[i + 0] & 0xFF); h *= m;
fac51f87def0 ucx update
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parents:
diff changeset
292 /* no break */
fac51f87def0 ucx update
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parents:
diff changeset
293 }
fac51f87def0 ucx update
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parents:
diff changeset
294
fac51f87def0 ucx update
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parents:
diff changeset
295 h ^= h >> 13;
fac51f87def0 ucx update
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parents:
diff changeset
296 h *= m;
fac51f87def0 ucx update
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parents:
diff changeset
297 h ^= h >> 15;
fac51f87def0 ucx update
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parents:
diff changeset
298
fac51f87def0 ucx update
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parents:
diff changeset
299 return h;
fac51f87def0 ucx update
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parents:
diff changeset
300 }
fac51f87def0 ucx update
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parents:
diff changeset
301
260
4779a6fb4fbe fix freebsd build
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parents: 254
diff changeset
302 UcxMapIterator ucx_map_iterator(UcxMap const *map) {
91
fac51f87def0 ucx update
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parents:
diff changeset
303 UcxMapIterator i;
fac51f87def0 ucx update
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parents:
diff changeset
304 i.map = map;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
305 i.cur = NULL;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
306 i.index = 0;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
307 return i;
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
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
310 int ucx_map_iter_next(UcxMapIterator *i, UcxKey *key, void **elm) {
fac51f87def0 ucx update
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parents:
diff changeset
311 UcxMapElement *e = i->cur;
fac51f87def0 ucx update
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parents:
diff changeset
312
fac51f87def0 ucx update
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parents:
diff changeset
313 if (e) {
fac51f87def0 ucx update
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parents:
diff changeset
314 e = e->next;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
315 } else {
fac51f87def0 ucx update
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parents:
diff changeset
316 e = i->map->map[0];
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
317 }
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
318
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
319 while (i->index < i->map->size) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
320 if (e) {
fac51f87def0 ucx update
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parents:
diff changeset
321 if (e->data) {
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
322 i->cur = e;
fac51f87def0 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
323 *elm = e->data;
254
4784c14aa639 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 135
diff changeset
324 key->data = e->key.data;
4784c14aa639 ucx update
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 135
diff changeset
325 key->hash = e->key.hash;
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326 key->len = e->key.len;
91
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327 return 1;
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328 }
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329
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330 e = e->next;
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331 } else {
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332 i->index++;
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333
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334 if (i->index < i->map->size) {
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335 e = i->map->map[i->index];
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336 }
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337 }
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338 }
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339
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340 return 0;
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341 }
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342
260
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343 UcxMap* ucx_map_union(const UcxMap *first, const UcxMap *second,
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344 copy_func cpfnc, void* cpdata) {
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345 return ucx_map_union_a(ucx_default_allocator(),
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346 first, second, cpfnc, cpdata);
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347 }
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348
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349 UcxMap* ucx_map_union_a(UcxAllocator *allocator,
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350 const UcxMap *first, const UcxMap *second,
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351 copy_func cpfnc, void* cpdata) {
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352 UcxMap* result = ucx_map_clone_a(allocator, first, cpfnc, cpdata);
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353 ucx_map_copy(second, result, cpfnc, cpdata);
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354 return result;
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355 }
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356
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357 UcxMap* ucx_map_intersection(const UcxMap *first, const UcxMap *second,
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358 copy_func cpfnc, void* cpdata) {
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359 return ucx_map_intersection_a(ucx_default_allocator(),
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360 first, second, cpfnc, cpdata);
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361 }
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362
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363 UcxMap* ucx_map_intersection_a(UcxAllocator *allocator,
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364 const UcxMap *first, const UcxMap *second,
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365 copy_func cpfnc, void* cpdata) {
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366 UcxMap *result = ucx_map_new_a(allocator, first->size < second->size ?
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367 first->size : second->size);
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368
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369 UcxMapIterator iter = ucx_map_iterator(first);
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370 void* value;
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371 UCX_MAP_FOREACH(key, value, iter) {
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372 if (ucx_map_get(second, key)) {
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373 ucx_map_put(result, key, cpfnc ? cpfnc(value, cpdata) : value);
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374 }
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375 }
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376
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377 return result;
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378 }
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379
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380 UcxMap* ucx_map_difference(const UcxMap *first, const UcxMap *second,
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381 copy_func cpfnc, void* cpdata) {
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382 return ucx_map_difference_a(ucx_default_allocator(),
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383 first, second, cpfnc, cpdata);
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384 }
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385
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386 UcxMap* ucx_map_difference_a(UcxAllocator *allocator,
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387 const UcxMap *first, const UcxMap *second,
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388 copy_func cpfnc, void* cpdata) {
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389
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390 UcxMap *result = ucx_map_new_a(allocator, first->size - second->count);
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391
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392 UcxMapIterator iter = ucx_map_iterator(first);
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393 void* value;
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394 UCX_MAP_FOREACH(key, value, iter) {
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395 if (!ucx_map_get(second, key)) {
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396 ucx_map_put(result, key, cpfnc ? cpfnc(value, cpdata) : value);
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397 }
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398 }
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399
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400 ucx_map_rehash(result);
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401 return result;
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diff changeset
402 }

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