src/server/util/object.h

Wed, 15 Mar 2023 19:46:02 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 15 Mar 2023 19:46:02 +0100
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parent 452
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permissions
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minimal support for ldap groups

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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 2013 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 #ifndef OBJECT_H
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30 #define OBJECT_H
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31
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32 #include "../public/nsapi.h"
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33 #include "pool.h"
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34
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35 #include <inttypes.h>
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36 #include <cx/list.h>
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37
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38 #ifdef __cplusplus
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39 extern "C" {
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40 #endif
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41
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42 // TODO: Enum auslagern in andere Datei?
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43 enum RequestStage {
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44 NSAPIAuthTrans = 0,
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45 NSAPINameTrans,
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46 NSAPIPathCheck,
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47 NSAPIObjectType,
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48 NSAPIService,
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49 NSAPIError,
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50 NSAPIAddLog,
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51 REQ_FINISH,
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52 NUM_NSAPI_TYPES
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53 };
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54 typedef enum RequestStage RequestStage;
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55
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56 typedef struct Condition Condition;
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57 typedef int8_t ConditionResult;
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58 typedef struct Expression Expression;
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59 typedef enum OperandType OperandType;
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60 typedef enum Operator Operator;
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61 typedef enum VarType VarType;
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62
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63 typedef struct NSAPIContext NSAPIContext;
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64 typedef struct HTTPObjectConfig HTTPObjectConfig;
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65
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66 struct directive {
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67 FuncStruct *func;
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68 pblock *param;
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69 Condition *cond;
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70 };
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71
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72 struct dtable {
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73 directive **dirs;
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74 int ndir;
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75 int alloc;
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76 };
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77
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78 struct httpd_object {
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79 pool_handle_t *pool;
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80 char *name;
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81 char *path;
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82 dtable *dt;
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83 int nd;
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84 };
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85
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86 struct httpd_objset {
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87 httpd_object **obj;
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88 int pos;
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89 };
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90
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91 struct Condition {
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92 Condition *parent;
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93 Condition *ifnot;
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94 Expression *expression;
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95 int depth;
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96 int index; // used by NSAPIContext to link expression with result
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97 };
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98
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99 struct Expression {
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100 // TODO
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101 int n;
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102 };
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103
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104
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105 struct NSAPIContext{
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106 HTTPObjectConfig *conf;
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107
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108 ConditionResult **results;
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109 int nres;
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110 int nmaxres;
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111
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112 //httpd_objset *objset;
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113 int last_req_code;
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114
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115 int objset_index;
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116 int dtable_index;
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117 };
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118
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119 struct HTTPObjectConfig {
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120 httpd_object **objects;
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121 int nobj;
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122 pool_handle_t *pool;
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123 uint32_t ref; // reference counter
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124 };
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125
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126
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127
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128 typedef struct NSAPIExpression NSAPIExpression;
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129 typedef enum NSAPIExpressionType NSAPIExpressionType;
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130 typedef enum NSAPIExpressionOperator NSAPIExpressionOperator;
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131
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132 enum NSAPIExpressionType {
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133 NSAPI_EXPRESSION_BOOL = 0,
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134 NSAPI_EXPRESSION_INT,
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135 NSAPI_EXPRESSION_DOUBLE,
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136 NSAPI_EXPRESSION_STRING,
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137 NSAPI_EXPRESSION_VARIABLE,
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138 NSAPI_EXPRESSION_LOGICAL,
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139 NSAPI_EXPRESSION_UNARY,
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140 NSAPI_EXPRESSION_BINARY,
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141 NSAPI_EXPRESSION_IDENTIFIER
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142 };
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143
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144 enum NSAPIExpressionOperator {
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145 NSAPI_EXPRESSION_NOOP = 0,
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146 NSAPI_EXPRESSION_CALL,
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147 NSAPI_EXPRESSION_ARG,
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148 NSAPI_EXPRESSION_WILDCARD_MATCH,
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149 NSAPI_EXPRESSION_REGEX_MATCH,
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150 NSAPI_EXPRESSION_REGEX_MISMATCH,
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151 NSAPI_EXPRESSION_EQ,
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152 NSAPI_EXPRESSION_NEQ,
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153 NSAPI_EXPRESSION_GT,
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154 NSAPI_EXPRESSION_LT,
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155 NSAPI_EXPRESSION_GE,
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156 NSAPI_EXPRESSION_LE,
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157 NSAPI_EXPRESSION_ADD,
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158 NSAPI_EXPRESSION_SUB,
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159 NSAPI_EXPRESSION_MUL,
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160 NSAPI_EXPRESSION_DIV,
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161 NSAPI_EXPRESSION_MOD,
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162 NSAPI_EXPRESSION_STRCAT,
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163 NSAPI_EXPRESSION_NOT,
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164 NSAPI_EXPRESSION_AND,
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165 NSAPI_EXPRESSION_OR,
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166 NSAPI_EXPRESSION_XOR,
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167 NSAPI_EXPRESSION_VALUE_DEFINED,
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168 NSAPI_EXPRESSION_DIR_EXISTS,
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169 NSAPI_EXPRESSION_FILE_DIR_EXISTS,
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170 NSAPI_EXPRESSION_FILE_EXISTS,
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171 NSAPI_EXPRESSION_SYMLINK_EXISTS,
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172 NSAPI_EXPRESSION_FILE_READABLE,
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173 NSAPI_EXPRESSION_FILE_SIZE
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174 };
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175
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176 union NSAPIExpressionValue {
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177 cxstring str;
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178 cxstring var;
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179 cxstring identifier;
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180 int64_t i;
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181 double f;
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182 int b;
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183 };
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184
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185 struct NSAPIExpression {
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186 // value.ptr is not null if
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187 // type is one of (bool, int, string): literal text
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188 // type is variable: variable name
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189 union NSAPIExpressionValue value;
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190
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191 NSAPIExpressionType type;
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192
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193 NSAPIExpressionOperator operator;
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194
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195 /*
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196 * left/single operand
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197 */
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198 NSAPIExpression *left;
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199
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200 /*
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201 * right operand or NULL
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202 */
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203 NSAPIExpression *right;
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204 };
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205
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206
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207
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208 /*
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209 * creates a new httpd_object
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210 */
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211 httpd_object* object_new(pool_handle_t *pool, char *name);
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212
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213 /*
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214 * frees an httpd_object
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215 */
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216 void object_free(httpd_object *obj);
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217
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218 /*
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219 * adds a directive to the object with the type dt (enum RequestPhase)
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220 */
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221 int object_add_directive(httpd_object *obj, directive *dir, int dt);
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222
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223 /*
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224 * get a list of all directives with a specific type
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225 */
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226 #define object_get_dtable(obj,type) &obj->dt[type];
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227
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228
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229
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230 /*
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231 * creates a new httpd_objset
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232 */
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233 httpd_objset* objset_create(pool_handle_t *pool);
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234
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235 /*
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236 * adds a object to the objset
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237 */
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238 void objset_add_object(pool_handle_t *p, httpd_objset *os, httpd_object *obj);
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239
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240
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241 /*
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242 * creates a new HTTPObjectConfig
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243 */
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244 // TODO
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245
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246 /*
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247 * adds an object to the object configuration
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248 */
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249 void httpobjconf_add_object(HTTPObjectConfig *conf, httpd_object *obj);
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250
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251
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252
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253 /*
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254 * prepares the NSAPI context for the next request stage
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255 */
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256 void nsapi_context_next_stage(NSAPIContext *context);
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257
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258
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259 /*
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260 * parses an expression from a list of cxstring tokens and compiles the
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261 * expression into an Expression object
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262 *
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263 * tokens: CxList that contains cxstring
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264 */
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265 Expression* condition_create(pool_handle_t *pool, CxList *tokens);
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266
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267 NSAPIExpression* expr_parse_logical_expr(pool_handle_t *pool, CxList *tokens, size_t *pos);
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268
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269 int condition_evaluate(Condition *condition, Session *sn, Request *rq);
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270
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271
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272 #ifdef __cplusplus
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273 }
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274 #endif
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275
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276 #endif /* OBJECT_H */
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277

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