Mercurial > dovecot > core-2.2

annotate src/lib/json-tree.c @ 22955:812e5c961328

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author Timo Sirainen <timo.sirainen@dovecot.fi>
date Thu, 03 May 2018 18:33:00 +0300
parents cb108f786fb4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
22713
cb108f786fb4 Updated copyright notices to include the year 2018.
Stephan Bosch <stephan.bosch@dovecot.fi>
parents: 21390
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1 /* Copyright (c) 2015-2018 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "json-tree.h"
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5
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6 struct json_tree {
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7 pool_t pool;
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8 struct json_tree_node *root, *cur, *cur_child;
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9 };
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10
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11 struct json_tree *json_tree_init(void)
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12 {
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13 struct json_tree *tree;
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14 pool_t pool;
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15
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16 pool = pool_alloconly_create("json tree", 1024);
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17 tree = p_new(pool, struct json_tree, 1);
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18 tree->pool = pool;
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19 tree->root = tree->cur = p_new(tree->pool, struct json_tree_node, 1);
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20 tree->cur->value_type = JSON_TYPE_OBJECT;
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21 return tree;
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22 }
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23
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24 void json_tree_deinit(struct json_tree **_tree)
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25 {
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26 struct json_tree *tree = *_tree;
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27
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28 *_tree = NULL;
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29 pool_unref(&tree->pool);
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30 }
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31
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32 static void
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33 json_tree_append_child(struct json_tree *tree, enum json_type type,
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34 const char *value)
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35 {
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36 struct json_tree_node *node;
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37
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38 node = p_new(tree->pool, struct json_tree_node, 1);
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39 node->parent = tree->cur;
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40 node->value_type = type;
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41 node->value.str = p_strdup(tree->pool, value);
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42
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43 if (tree->cur_child == NULL)
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44 tree->cur->value.child = node;
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45 else
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46 tree->cur_child->next = node;
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47 tree->cur_child = node;
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48 }
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49
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50 static void
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51 json_tree_set_cur(struct json_tree *tree, struct json_tree_node *node)
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52 {
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53 tree->cur = node;
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54 tree->cur_child = tree->cur->value.child;
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55 if (tree->cur_child != NULL) {
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56 while (tree->cur_child->next != NULL)
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57 tree->cur_child = tree->cur_child->next;
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58 }
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59 }
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60
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61 static int
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62 json_tree_append_value(struct json_tree *tree, enum json_type type,
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63 const char *value)
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64 {
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65 switch (tree->cur->value_type) {
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66 case JSON_TYPE_OBJECT_KEY:
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67 /* "key": value - we already added the node and set its key,
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68 so now just set the value */
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69 tree->cur->value_type = type;
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70 tree->cur->value.str = p_strdup(tree->pool, value);
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71 json_tree_set_cur(tree, tree->cur->parent);
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72 break;
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73 case JSON_TYPE_ARRAY:
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74 /* element in array - add a new node */
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75 json_tree_append_child(tree, type, value);
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76 break;
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77 default:
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78 return -1;
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79 }
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80 return 0;
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81 }
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82
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83 int json_tree_append(struct json_tree *tree, enum json_type type,
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84 const char *value)
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85 {
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86 switch (type) {
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87 case JSON_TYPE_OBJECT_KEY:
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88 if (tree->cur->value_type != JSON_TYPE_OBJECT)
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89 return -1;
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90 json_tree_append_child(tree, type, NULL);
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91 json_tree_set_cur(tree, tree->cur_child);
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92 tree->cur->key = p_strdup(tree->pool, value);
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93 break;
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94 case JSON_TYPE_ARRAY:
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95 if (json_tree_append_value(tree, type, NULL) < 0)
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96 return -1;
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97 json_tree_set_cur(tree, tree->cur_child);
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98 break;
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99 case JSON_TYPE_OBJECT:
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100 if (tree->cur->value_type == JSON_TYPE_OBJECT_KEY)
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101 tree->cur->value_type = JSON_TYPE_OBJECT;
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102 else if (tree->cur->value_type == JSON_TYPE_ARRAY) {
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103 json_tree_append_child(tree, type, NULL);
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104 json_tree_set_cur(tree, tree->cur_child);
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105 } else {
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106 return -1;
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107 }
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108 break;
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109 case JSON_TYPE_OBJECT_END:
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110 if (tree->cur->parent == NULL ||
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111 tree->cur->value_type != JSON_TYPE_OBJECT)
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112 return -1;
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113 json_tree_set_cur(tree, tree->cur->parent);
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114 break;
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115 case JSON_TYPE_ARRAY_END:
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116 if (tree->cur->parent == NULL ||
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117 tree->cur->value_type != JSON_TYPE_ARRAY)
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118 return -1;
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119 json_tree_set_cur(tree, tree->cur->parent);
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120 break;
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121 case JSON_TYPE_STRING:
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122 case JSON_TYPE_NUMBER:
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123 case JSON_TYPE_TRUE:
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124 case JSON_TYPE_FALSE:
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125 case JSON_TYPE_NULL:
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126 if (json_tree_append_value(tree, type, value) < 0)
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127 return -1;
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128 break;
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129 }
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130 return 0;
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131 }
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132
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133 struct json_tree_node *json_tree_root(struct json_tree *tree)
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134 {
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135 return tree->root;
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136 }
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137
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138 struct json_tree_node *
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139 json_tree_find_key(struct json_tree_node *node, const char *key)
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140 {
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141 for (; node != NULL; node = node->next) {
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142 if (node->key != NULL && strcmp(node->key, key) == 0)
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143 return node;
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144 }
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145 return NULL;
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146 }
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147
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148 struct json_tree_node *
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149 json_tree_find_child_with(struct json_tree_node *node,
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150 const char *key, const char *value)
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151 {
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152 struct json_tree_node *child;
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153
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154 i_assert(node->value_type == JSON_TYPE_OBJECT ||
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155 node->value_type == JSON_TYPE_ARRAY);
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156
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157 for (node = node->value.child; node != NULL; node = node->next) {
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158 if (node->value_type != JSON_TYPE_OBJECT)
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159 continue;
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160
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161 child = json_tree_find_key(node->value.child, key);
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162 if (child != NULL && child->value.str != NULL &&
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163 strcmp(child->value.str, value) == 0)
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164 return node;
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165 }
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166 return NULL;
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167 }