src/cx/json.h

6 days ago

author
Mike Becker <universe@uap-core.de>
date
Sun, 15 Dec 2024 15:44:40 +0100 (6 days ago)
changeset 1019
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parent 1013
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child 1033
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permissions
-rw-r--r--

add explicit casts to silence warnings

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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 2024 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 * \file json.h
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30 * \brief Interface for parsing data from JSON files.
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31 * \author Mike Becker
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32 * \author Olaf Wintermann
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33 * \copyright 2-Clause BSD License
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34 */
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35
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36 #ifndef UCX_JSON_H
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37 #define UCX_JSON_H
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38
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39 #include "common.h"
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40 #include "allocator.h"
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41 #include "string.h"
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42 #include "buffer.h"
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43 #include "array_list.h"
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44
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45 #ifdef __cplusplus
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46 extern "C" {
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47 #endif
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48
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49
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50 /**
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51 * The type of the parsed token.
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52 */
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53 enum cx_json_token_type {
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54 /**
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55 * No complete token parsed, yet.
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56 */
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57 CX_JSON_NO_TOKEN,
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58 /**
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59 * The presumed token contains syntactical errors.
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60 */
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61 CX_JSON_TOKEN_ERROR,
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62 /**
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63 * A "begin of array" '[' token.
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64 */
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65 CX_JSON_TOKEN_BEGIN_ARRAY,
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66 /**
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67 * A "begin of object" '{' token.
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68 */
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69 CX_JSON_TOKEN_BEGIN_OBJECT,
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70 /**
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71 * An "end of array" ']' token.
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72 */
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73 CX_JSON_TOKEN_END_ARRAY,
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74 /**
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75 * An "end of object" '}' token.
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76 */
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77 CX_JSON_TOKEN_END_OBJECT,
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78 /**
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79 * A colon ':' token separating names and values.
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80 */
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81 CX_JSON_TOKEN_NAME_SEPARATOR,
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82 /**
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83 * A comma ',' token separating object entries or array elements.
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84 */
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85 CX_JSON_TOKEN_VALUE_SEPARATOR,
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86 /**
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87 * A string token.
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88 */
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89 CX_JSON_TOKEN_STRING,
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90 /**
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91 * A number token that can be represented as integer.
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92 */
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93 CX_JSON_TOKEN_INTEGER,
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94 /**
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95 * A number token that cannot be represented as integer.
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96 */
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97 CX_JSON_TOKEN_NUMBER,
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98 /**
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99 * A literal token.
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100 */
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101 CX_JSON_TOKEN_LITERAL,
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102 /**
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103 * A white-space token.
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104 */
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105 CX_JSON_TOKEN_SPACE
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106 };
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107
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108 /**
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109 * The type of some JSON value.
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110 */
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111 enum cx_json_value_type {
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112 /**
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113 * Reserved.
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114 */
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115 CX_JSON_NOTHING, // this allows us to always return non-NULL values
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116 /**
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117 * A JSON object.
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118 */
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119 CX_JSON_OBJECT,
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120 /**
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121 * A JSON array.
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122 */
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123 CX_JSON_ARRAY,
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124 /**
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125 * A string.
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126 */
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127 CX_JSON_STRING,
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128 /**
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129 * A number that contains an integer.
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130 */
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131 CX_JSON_INTEGER,
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132 /**
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133 * A number, not necessarily an integer.
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134 */
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135 CX_JSON_NUMBER,
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136 /**
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137 * A literal (true, false, null).
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138 */
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139 CX_JSON_LITERAL
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140 };
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141
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142 /**
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143 * JSON literal types.
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144 */
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145 enum cx_json_literal {
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146 /**
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147 * The \c null literal.
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148 */
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149 CX_JSON_NULL,
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150 /**
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151 * The \c true literal.
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152 */
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153 CX_JSON_TRUE,
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154 /**
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155 * The \c false literal.
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156 */
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157 CX_JSON_FALSE
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158 };
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159
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160 /**
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161 * Type alias for the token type enum.
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162 */
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163 typedef enum cx_json_token_type CxJsonTokenType;
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164 /**
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165 * Type alias for the value type enum.
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166 */
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167 typedef enum cx_json_value_type CxJsonValueType;
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168
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169 /**
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170 * Type alias for the JSON parser interface.
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171 */
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172 typedef struct cx_json_s CxJson;
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173
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174 /**
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175 * Type alias for the token struct.
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176 */
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177 typedef struct cx_json_token_s CxJsonToken;
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178
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179 /**
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180 * Type alias for the JSON value struct.
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181 */
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182 typedef struct cx_json_value_s CxJsonValue;
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183
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184 /**
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185 * Type alias for the JSON array struct.
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186 */
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187 typedef struct cx_json_array_s CxJsonArray;
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188 /**
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189 * Type alias for the JSON object struct.
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190 */
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191 typedef struct cx_json_object_s CxJsonObject;
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192 /**
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193 * Type alias for a JSON string.
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194 */
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195 typedef struct cx_mutstr_s CxJsonString;
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196 /**
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197 * Type alias for a number that can be represented as 64-bit signed integer.
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198 */
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199 typedef int64_t CxJsonInteger;
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200 /**
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201 * Type alias for number that is not an integer.
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202 */
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203 typedef double CxJsonNumber;
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204 /**
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205 * Type alias for a JSON literal.
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206 */
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207 typedef enum cx_json_literal CxJsonLiteral;
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208
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209 /**
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210 * Type alias for a key/value pair in a JSON object.
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211 */
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212 typedef struct cx_json_obj_value_s CxJsonObjValue;
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213
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214 /**
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215 * JSON array structure.
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216 */
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217 struct cx_json_array_s {
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218 /**
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219 * The array data.
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220 */
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221 CX_ARRAY_DECLARE(CxJsonValue*, array);
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222 };
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223
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224 /**
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225 * JSON object structure.
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226 */
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227 struct cx_json_object_s {
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228 /**
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229 * The key/value entries.
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230 */
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231 CX_ARRAY_DECLARE(CxJsonObjValue, values);
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232 };
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233
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234 /**
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235 * Structure for a key/value entry in a JSON object.
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236 */
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237 struct cx_json_obj_value_s {
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238 /**
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239 * The key a.k.a. name of the value.
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240 */
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241 char *name;
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242 /**
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243 * The value.
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244 */
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245 CxJsonValue *value;
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246 };
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247
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248 /**
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249 * Structure for a JSON value.
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250 */
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251 struct cx_json_value_s {
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252 /**
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253 * The allocator with which the value was allocated.
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254 *
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255 * Required for recursively deallocating memory of objects and arrays.
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256 */
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257 const CxAllocator *allocator;
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258 /**
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259 * The type of this value.
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260 *
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261 * Specifies how the \c value union shall be resolved.
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262 */
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263 CxJsonValueType type;
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264 /**
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265 * The value data.
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266 */
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267 union {
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268 /**
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269 * The array data if type is #CX_JSON_ARRAY.
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270 */
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271 CxJsonArray array;
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272 /**
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273 * The object data if type is #CX_JSON_OBJECT.
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274 */
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275 CxJsonObject object;
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276 /**
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277 * The string data if type is #CX_JSON_STRING.
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278 */
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279 CxJsonString string;
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280 /**
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281 * The integer if type is #CX_JSON_INTEGER.
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282 */
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283 CxJsonInteger integer;
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284 /**
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285 * The number if type is #CX_JSON_NUMBER.
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286 */
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287 CxJsonNumber number;
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288 /**
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289 * The literal type if type is #CX_JSON_LITERAL.
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290 */
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291 CxJsonLiteral literal;
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292 } value;
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293 };
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294
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295 /**
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296 * Structure for a parsed token.
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297 */
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298 struct cx_json_token_s {
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299 /**
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300 * The token type.
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301 */
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302 CxJsonTokenType tokentype;
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303 /**
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304 * True, iff the \c content must be passed to cx_strfree().
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305 */
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306 bool allocated;
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307 /**
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308 * The token text, if any.
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309 *
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310 * This is not necessarily set when the token type already
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311 * uniquely identifies the content.
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312 */
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313 cxmutstr content;
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314 };
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315
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316 /**
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317 * The JSON parser interface.
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318 */
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319 struct cx_json_s {
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320 /**
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321 * The allocator used for produced JSON values.
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322 */
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323 const CxAllocator *allocator;
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324 /**
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325 * The input buffer.
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326 */
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327 CxBuffer buffer;
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328
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329 /**
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330 * Used internally.
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331 *
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332 * Remembers the prefix of the last uncompleted token.
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333 */
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334 CxJsonToken uncompleted;
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335
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336 /**
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337 * A pointer to an intermediate state of the currently parsed value.
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338 *
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339 * Never access this value manually.
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340 */
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341 CxJsonValue *parsed;
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342
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343 /**
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344 * State stack.
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345 */
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346 CX_ARRAY_DECLARE_SIZED(int, states, unsigned);
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347
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348 /**
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349 * Value buffer stack.
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350 */
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351 CX_ARRAY_DECLARE_SIZED(CxJsonValue*, vbuf, unsigned);
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352
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353 /**
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354 * Internally reserved memory for the state stack.
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355 */
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356 int states_internal[8];
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357
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358 /**
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359 * Internally reserved memory for the value buffer stack.
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360 */
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361 CxJsonValue* vbuf_internal[8];
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362
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363 /**
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364 * Used internally.
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365 */
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366 bool tokenizer_escape; // TODO: check if it can be replaced with look-behind
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367 };
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368
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369 /**
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370 * Status codes for the json interface.
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371 */
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372 enum cx_json_status {
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373 /**
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374 * Everything is fine.
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375 */
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376 CX_JSON_NO_ERROR,
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377 /**
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378 * The input buffer does not contain more data.
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379 */
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380 CX_JSON_NO_DATA,
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381 /**
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382 * The input ends unexpectedly.
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383 *
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384 * Refill the buffer with cxJsonFill() to complete the json data.
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385 */
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386 CX_JSON_INCOMPLETE_DATA,
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387 /**
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388 * Not used as a status and never returned by any function.
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389 *
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390 * You can use this enumerator to check for all "good" status results
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391 * by checking if the status is less than \c CX_JSON_OK.
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392 *
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393 * A "good" status means, that you can refill data and continue parsing.
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394 */
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395 CX_JSON_OK,
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396 /**
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397 * Allocating memory for the internal buffer failed.
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398 */
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399 CX_JSON_BUFFER_ALLOC_FAILED,
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400 /**
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401 * Allocating memory for a json value failed.
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402 */
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403 CX_JSON_VALUE_ALLOC_FAILED,
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404 /**
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405 * A number value is incorrectly formatted.
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406 */
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407 CX_JSON_FORMAT_ERROR_NUMBER,
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408 /**
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409 * The tokenizer found something unexpected.
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410 */
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411 CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN
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412 };
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413
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414 /**
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415 * Typedef for the json status enum.
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416 */
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417 typedef enum cx_json_status CxJsonStatus;
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418
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419 /**
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420 * Initializes the json interface.
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421 *
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422 * @param json the json interface
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423 * @param allocator the allocator that shall be used for the produced values
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424 * @see cxJsonDestroy()
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425 */
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426 cx_attr_nonnull_arg(1)
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427 void cxJsonInit(CxJson *json, const CxAllocator *allocator);
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428
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429 /**
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430 * Destroys the json interface.
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431 *
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432 * @param json the json interface
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433 * @see cxJsonInit()
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434 */
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435 cx_attr_nonnull
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436 void cxJsonDestroy(CxJson *json);
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437
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438 /**
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439 * Destroys and re-initializes the json interface.
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440 *
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441 * You might want to use this, to reset the parser after
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442 * encountering a syntax error.
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443 *
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444 * @param json the json interface
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445 */
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446 cx_attr_nonnull
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447 static inline void cxJsonReset(CxJson *json) {
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448 const CxAllocator *allocator = json->allocator;
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449 cxJsonDestroy(json);
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450 cxJsonInit(json, allocator);
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451 }
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452
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453 /**
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454 * Adds more data to the input buffer.
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455 *
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456 * The data will be copied.
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457 *
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458 * @param json the json interface
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459 * @param buf the source buffer
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460 * @param len the length of the source buffer
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461 * @return zero on success, non-zero on internal allocation error
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462 * @see cxJsonFill()
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463 */
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464 cx_attr_nonnull
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465 cx_attr_access_r(2, 3)
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466 int cxJsonFilln(CxJson *json, const char *buf, size_t len);
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467
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468 #ifdef __cplusplus
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469 } // extern "C"
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470
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471 /**
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472 * Adds more data to the input buffer.
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473 *
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474 * The data will be copied.
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475 *
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476 * @param json the json interface
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477 * @param str the string to add to the buffer
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478 * @return zero on success, non-zero on internal allocation error
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479 * @see cxJsonFilln()
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480 */
988
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481 cx_attr_nonnull
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482 static inline int cxJsonFill(
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483 CxJson *json,
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484 cxstring str
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485 ) {
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486 return cxJsonFilln(json, str.ptr, str.length);
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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487 }
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488
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489 /**
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490 * Adds more data to the input buffer.
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diff changeset
491 *
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492 * The data will be copied.
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parents: 1009
diff changeset
493 *
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494 * @param json the json interface
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495 * @param str the string to add to the buffer
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496 * @return zero on success, non-zero on internal allocation error
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497 * @see cxJsonFilln()
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498 */
988
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499 cx_attr_nonnull
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500 static inline int cxJsonFill(
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501 CxJson *json,
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502 cxmutstr str
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503 ) {
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504 return cxJsonFilln(json, str.ptr, str.length);
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parents: 985
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505 }
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diff changeset
506
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507 /**
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508 * Adds more data to the input buffer.
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diff changeset
509 *
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diff changeset
510 * The data will be copied.
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diff changeset
511 *
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512 * @param json the json interface
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513 * @param str the string to add to the buffer
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514 * @return zero on success, non-zero on internal allocation error
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515 * @see cxJsonFilln()
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516 */
988
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517 cx_attr_nonnull
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518 cx_attr_cstr_arg(2)
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519 static inline int cxJsonFill(
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520 CxJson *json,
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521 const char *str
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522 ) {
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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523 return cxJsonFilln(json, str, strlen(str));
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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524 }
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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525
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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diff changeset
526 extern "C" {
15b3ca7ee33f make ucx C++ compatible again (and add tests for it) - fixes #486
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diff changeset
527 #else // __cplusplus
1012
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528 /**
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diff changeset
529 * Adds more data to the input buffer.
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parents: 1009
diff changeset
530 *
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parents: 1009
diff changeset
531 * The data will be copied.
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parents: 1009
diff changeset
532 *
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533 * @param json the json interface
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534 * @param str the string to add to the buffer
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535 * @return zero on success, non-zero on internal allocation error
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536 * @see cxJsonFilln()
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diff changeset
537 */
974
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538 #define cxJsonFill(json, str) _Generic((str), \
973
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539 cxstring: cx_json_fill_cxstr, \
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540 cxmutstr: cx_json_fill_mutstr, \
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parents: 967
diff changeset
541 char*: cx_json_fill_str, \
05910a8994f7 add UCX string support to cxJsonFill()
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542 const char*: cx_json_fill_str) \
974
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543 (json, str)
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544
1012
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diff changeset
545 /**
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parents: 1009
diff changeset
546 * Adds more data to the input buffer.
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parents: 1009
diff changeset
547 *
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parents: 1009
diff changeset
548 * Internal function - please use the #cxJsonFill() macro.
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parents: 1009
diff changeset
549 *
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parents: 1009
diff changeset
550 * @param json the json interface
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parents: 1009
diff changeset
551 * @param str the string to add to the buffer
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diff changeset
552 * @return zero on success, non-zero on internal allocation error
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parents: 1009
diff changeset
553 * @see cxJsonFill()
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parents: 1009
diff changeset
554 */
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555 cx_attr_nonnull
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556 static inline int cx_json_fill_cxstr(
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557 CxJson *json,
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558 cxstring str
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diff changeset
559 ) {
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parents: 967
diff changeset
560 return cxJsonFilln(json, str.ptr, str.length);
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parents: 967
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561 }
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parents: 967
diff changeset
562
1012
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563 /**
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parents: 1009
diff changeset
564 * Adds more data to the input buffer.
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parents: 1009
diff changeset
565 *
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parents: 1009
diff changeset
566 * Internal function - please use the #cxJsonFill() macro.
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parents: 1009
diff changeset
567 *
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parents: 1009
diff changeset
568 * @param json the json interface
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parents: 1009
diff changeset
569 * @param str the string to add to the buffer
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parents: 1009
diff changeset
570 * @return zero on success, non-zero on internal allocation error
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parents: 1009
diff changeset
571 * @see cxJsonFill()
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parents: 1009
diff changeset
572 */
985
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573 cx_attr_nonnull
973
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574 static inline int cx_json_fill_mutstr(
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Mike Becker <universe@uap-core.de>
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575 CxJson *json,
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576 cxmutstr str
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diff changeset
577 ) {
05910a8994f7 add UCX string support to cxJsonFill()
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parents: 967
diff changeset
578 return cxJsonFilln(json, str.ptr, str.length);
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parents: 967
diff changeset
579 }
05910a8994f7 add UCX string support to cxJsonFill()
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parents: 967
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580
1012
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diff changeset
581 /**
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parents: 1009
diff changeset
582 * Adds more data to the input buffer.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
583 *
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parents: 1009
diff changeset
584 * Internal function - please use the #cxJsonFill() macro.
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parents: 1009
diff changeset
585 *
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parents: 1009
diff changeset
586 * @param json the json interface
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parents: 1009
diff changeset
587 * @param str the string to add to the buffer
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parents: 1009
diff changeset
588 * @return zero on success, non-zero on internal allocation error
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parents: 1009
diff changeset
589 * @see cxJsonFill()
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parents: 1009
diff changeset
590 */
985
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591 cx_attr_nonnull
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diff changeset
592 cx_attr_cstr_arg(2)
973
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diff changeset
593 static inline int cx_json_fill_str(
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Mike Becker <universe@uap-core.de>
parents: 967
diff changeset
594 CxJson *json,
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parents: 967
diff changeset
595 const char *str
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parents: 967
diff changeset
596 ) {
05910a8994f7 add UCX string support to cxJsonFill()
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parents: 967
diff changeset
597 return cxJsonFilln(json, str, strlen(str));
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diff changeset
598 }
988
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diff changeset
599 #endif
973
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600
1012
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diff changeset
601 /**
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parents: 1009
diff changeset
602 * Recursively deallocates the memory of a JSON value.
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parents: 1009
diff changeset
603 *
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parents: 1009
diff changeset
604 * \remark The type of each deallocated value will be changed
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parents: 1009
diff changeset
605 * to #CX_JSON_NOTHING and values of such type will be skipped
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parents: 1009
diff changeset
606 * by the de-allocation. That means, this function protects
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parents: 1009
diff changeset
607 * you from double-frees when you are accidentally freeing
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parents: 1009
diff changeset
608 * a nested value and then the parent value (or vice versa).
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parents: 1009
diff changeset
609 *
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parents: 1009
diff changeset
610 * @param value the value
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parents: 1009
diff changeset
611 */
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diff changeset
612 void cxJsonValueFree(CxJsonValue *value);
937
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parents:
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613
1012
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diff changeset
614 /**
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parents: 1009
diff changeset
615 * Tries to obtain the next JSON value.
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parents: 1009
diff changeset
616 *
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parents: 1009
diff changeset
617 *
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diff changeset
618 * @param json the json interface
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diff changeset
619 * @param value a pointer where the next value shall be stored
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620 * @return a status code
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diff changeset
621 */
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622 cx_attr_nonnull
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diff changeset
623 cx_attr_access_w(2)
1002
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parents: 1000
diff changeset
624 CxJsonStatus cxJsonNext(CxJson *json, CxJsonValue **value);
937
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parents:
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625
1012
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diff changeset
626 /**
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parents: 1009
diff changeset
627 * Checks if the specified value is a JSON object.
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parents: 1009
diff changeset
628 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
629 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
630 * @return true if the value is a JSON object, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
631 */
985
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parents: 974
diff changeset
632 cx_attr_nonnull
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Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
633 static inline bool cxJsonIsObject(const CxJsonValue *value) {
937
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parents:
diff changeset
634 return value->type == CX_JSON_OBJECT;
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parents:
diff changeset
635 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
636
1012
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parents: 1009
diff changeset
637 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
638 * Checks if the specified value is a JSON array.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
639 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
640 * @param value a pointer to the value
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
641 * @return true if the value is a JSON array, false otherwise
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
642 */
985
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parents: 974
diff changeset
643 cx_attr_nonnull
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parents: 1007
diff changeset
644 static inline bool cxJsonIsArray(const CxJsonValue *value) {
937
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
645 return value->type == CX_JSON_ARRAY;
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
646 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
647
1012
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
648 /**
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parents: 1009
diff changeset
649 * Checks if the specified value is a string.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
650 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
651 * @param value a pointer to the value
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parents: 1009
diff changeset
652 * @return true if the value is a string, false otherwise
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
653 */
985
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parents: 974
diff changeset
654 cx_attr_nonnull
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parents: 1007
diff changeset
655 static inline bool cxJsonIsString(const CxJsonValue *value) {
937
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parents:
diff changeset
656 return value->type == CX_JSON_STRING;
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
657 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
658
1012
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
659 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
660 * Checks if the specified value is a JSON number.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
661 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
662 * This function will return true for both floating point and
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
663 * integer numbers.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
664 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
665 * @param value a pointer to the value
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
666 * @return true if the value is a JSON number, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
667 * @see cxJsonIsInteger()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
668 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
669 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
670 static inline bool cxJsonIsNumber(const CxJsonValue *value) {
966
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
671 return value->type == CX_JSON_NUMBER || value->type == CX_JSON_INTEGER;
937
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
672 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
673
1012
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
674 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
675 * Checks if the specified value is an integer number.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
676 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
677 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
678 * @return true if the value is an integer number, false otherwise
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
679 * @see cxJsonIsNumber()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
680 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
681 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
682 static inline bool cxJsonIsInteger(const CxJsonValue *value) {
937
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
683 return value->type == CX_JSON_INTEGER;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
684 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
685
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
686 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
687 * Checks if the specified value is a JSON literal.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
688 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
689 * JSON literals are \c true, \c false, and \c null.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
690 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
691 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
692 * @return true if the value is a JSON literal, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
693 * @see cxJsonIsTrue()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
694 * @see cxJsonIsFalse()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
695 * @see cxJsonIsNull()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
696 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
697 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
698 static inline bool cxJsonIsLiteral(const CxJsonValue *value) {
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
699 return value->type == CX_JSON_LITERAL;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
700 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
701
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
702 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
703 * Checks if the specified value is a Boolean literal.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
704 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
705 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
706 * @return true if the value is either \c true or \c false, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
707 * @see cxJsonIsTrue()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
708 * @see cxJsonIsFalse()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
709 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
710 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
711 static inline bool cxJsonIsBool(const CxJsonValue *value) {
965
dfdfedbe2c86 remove single-member structs
Mike Becker <universe@uap-core.de>
parents: 954
diff changeset
712 return cxJsonIsLiteral(value) && value->value.literal != CX_JSON_NULL;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
713 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
714
1012
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
715 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
716 * Checks if the specified value is \c true.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
717 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
718 * \remark Be advised, that this is not the same as
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
719 * testing \c !cxJsonIsFalse(v).
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
720 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
721 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
722 * @return true if the value is \c true, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
723 * @see cxJsonIsBool()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
724 * @see cxJsonIsFalse()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
725 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
726 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
727 static inline bool cxJsonIsTrue(const CxJsonValue *value) {
965
dfdfedbe2c86 remove single-member structs
Mike Becker <universe@uap-core.de>
parents: 954
diff changeset
728 return cxJsonIsLiteral(value) && value->value.literal == CX_JSON_TRUE;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
729 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
730
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
731 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
732 * Checks if the specified value is \c false.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
733 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
734 * \remark Be advised, that this is not the same as
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
735 * testing \c !cxJsonIsTrue(v).
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
736 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
737 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
738 * @return true if the value is \c false, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
739 * @see cxJsonIsBool()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
740 * @see cxJsonIsTrue()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
741 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
742 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
743 static inline bool cxJsonIsFalse(const CxJsonValue *value) {
965
dfdfedbe2c86 remove single-member structs
Mike Becker <universe@uap-core.de>
parents: 954
diff changeset
744 return cxJsonIsLiteral(value) && value->value.literal == CX_JSON_FALSE;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
745 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
746
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
747 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
748 * Checks if the specified value is \c null.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
749 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
750 * @param value a pointer to the value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
751 * @return true if the value is \c null, false otherwise
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
752 * @see cxJsonIsLiteral()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
753 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
754 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
755 static inline bool cxJsonIsNull(const CxJsonValue *value) {
965
dfdfedbe2c86 remove single-member structs
Mike Becker <universe@uap-core.de>
parents: 954
diff changeset
756 return cxJsonIsLiteral(value) && value->value.literal == CX_JSON_NULL;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
757 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
758
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
759 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
760 * Obtains a C string from the given JSON value.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
761 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
762 * If the value is not a string, the behavior is undefined.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
763 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
764 * @param value the JSON value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
765 * @return the value represented as C string
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
766 * @see cxJsonIsString()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
767 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
768 cx_attr_nonnull
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
769 cx_attr_returns_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
770 static inline char *cxJsonAsString(const CxJsonValue *value) {
966
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
771 return value->value.string.ptr;
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
772 }
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
773
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
774 /**
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
775 * Obtains a UCX string from the given JSON value.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
776 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
777 * If the value is not a string, the behavior is undefined.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
778 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
779 * @param value the JSON value
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
780 * @return the value represented as UCX string
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
781 * @see cxJsonIsString()
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
782 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
783 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
784 static inline cxstring cxJsonAsCxString(const CxJsonValue *value) {
966
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
785 return cx_strcast(value->value.string);
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
786 }
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
787
1012
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parents: 1009
diff changeset
788 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
789 * Obtains a mutable UCX string from the given JSON value.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
790 *
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parents: 1009
diff changeset
791 * If the value is not a string, the behavior is undefined.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
792 *
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parents: 1009
diff changeset
793 * @param value the JSON value
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
794 * @return the value represented as mutable UCX string
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
795 * @see cxJsonIsString()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
796 */
985
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
797 cx_attr_nonnull
1009
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parents: 1007
diff changeset
798 static inline cxmutstr cxJsonAsCxMutStr(const CxJsonValue *value) {
937
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parents:
diff changeset
799 return value->value.string;
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parents:
diff changeset
800 }
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
801
1012
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
802 /**
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parents: 1009
diff changeset
803 * Obtains a double-precision floating point value from the given JSON value.
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parents: 1009
diff changeset
804 *
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parents: 1009
diff changeset
805 * If the value is not a JSON number, the behavior is undefined.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
806 *
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parents: 1009
diff changeset
807 * @param value the JSON value
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parents: 1009
diff changeset
808 * @return the value represented as double
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
809 * @see cxJsonIsNumber()
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parents: 1009
diff changeset
810 */
985
68754c7de906 major refactoring of attributes
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diff changeset
811 cx_attr_nonnull
1009
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parents: 1007
diff changeset
812 static inline double cxJsonAsDouble(const CxJsonValue *value) {
966
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
813 if (value->type == CX_JSON_INTEGER) {
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
814 return (double) value->value.integer;
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
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parents: 965
diff changeset
815 } else {
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
816 return value->value.number;
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
817 }
937
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parents:
diff changeset
818 }
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
819
1012
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parents: 1009
diff changeset
820 /**
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parents: 1009
diff changeset
821 * Obtains a 64-bit signed integer from the given JSON value.
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parents: 1009
diff changeset
822 *
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parents: 1009
diff changeset
823 * If the value is not a JSON number, the behavior is undefined.
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parents: 1009
diff changeset
824 * If it is a JSON number, but not an integer, the value will be
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
825 * converted to an integer, possibly losing precision.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
826 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
827 * @param value the JSON value
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parents: 1009
diff changeset
828 * @return the value represented as double
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parents: 1009
diff changeset
829 * @see cxJsonIsNumber()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
830 * @see cxJsonIsInteger()
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parents: 1009
diff changeset
831 */
985
68754c7de906 major refactoring of attributes
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parents: 974
diff changeset
832 cx_attr_nonnull
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
833 static inline int64_t cxJsonAsInteger(const CxJsonValue *value) {
966
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
834 if (value->type == CX_JSON_INTEGER) {
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
835 return value->value.integer;
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
836 } else {
1aa7ec3e46e7 treat integers and doubles both as JSON numbers
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
837 return (int64_t) value->value.number;
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Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
838 }
937
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parents:
diff changeset
839 }
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
840
1012
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parents: 1009
diff changeset
841 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
842 * Obtains a Boolean value from the given JSON value.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
843 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
844 * If the value is not a JSON literal, the behavior is undefined.
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parents: 1009
diff changeset
845 * The \c null literal is interpreted as \c false.
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parents: 1009
diff changeset
846 *
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parents: 1009
diff changeset
847 * @param value the JSON value
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parents: 1009
diff changeset
848 * @return the value represented as double
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parents: 1009
diff changeset
849 * @see cxJsonIsLiteral()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
850 */
985
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parents: 974
diff changeset
851 cx_attr_nonnull
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Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
852 static inline bool cxJsonAsBool(const CxJsonValue *value) {
965
dfdfedbe2c86 remove single-member structs
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parents: 954
diff changeset
853 return value->value.literal == CX_JSON_TRUE;
937
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diff changeset
854 }
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parents:
diff changeset
855
1012
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parents: 1009
diff changeset
856 /**
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parents: 1009
diff changeset
857 * Returns the size of a JSON array.
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parents: 1009
diff changeset
858 *
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parents: 1009
diff changeset
859 * If the value is not a JSON array, the behavior is undefined.
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parents: 1009
diff changeset
860 *
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parents: 1009
diff changeset
861 * @param value the JSON value
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parents: 1009
diff changeset
862 * @return the size of the array
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parents: 1009
diff changeset
863 * @see cxJsonIsArray()
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parents: 1009
diff changeset
864 */
985
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diff changeset
865 cx_attr_nonnull
1009
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parents: 1007
diff changeset
866 static inline size_t cxJsonArrSize(const CxJsonValue *value) {
967
a58f602ed2fe simplify parsing of array and object elements
Mike Becker <universe@uap-core.de>
parents: 966
diff changeset
867 return value->value.array.array_size;
937
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parents:
diff changeset
868 }
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parents:
diff changeset
869
1012
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parents: 1009
diff changeset
870 /**
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parents: 1009
diff changeset
871 * Returns an element from a JSON array.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
872 *
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
873 * If the value is not a JSON array, the behavior is undefined.
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parents: 1009
diff changeset
874 *
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parents: 1009
diff changeset
875 * This function guarantees to return a value. If the index is
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
876 * out of bounds, the returned value will be of type
21884374edbb add documentation - resolves #431
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parents: 1009
diff changeset
877 * #CX_JSON_NOTHING, but never \c NULL.
21884374edbb add documentation - resolves #431
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parents: 1009
diff changeset
878 *
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parents: 1009
diff changeset
879 * @param value the JSON value
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parents: 1009
diff changeset
880 * @param index the index in the array
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
881 * @return the value at the specified index
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parents: 1009
diff changeset
882 * @see cxJsonIsArray()
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parents: 1009
diff changeset
883 */
985
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parents: 974
diff changeset
884 cx_attr_nonnull
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parents: 974
diff changeset
885 cx_attr_returns_nonnull
1009
7650e722437e minor cleanup
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parents: 1007
diff changeset
886 CxJsonValue *cxJsonArrGet(const CxJsonValue *value, size_t index);
937
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parents:
diff changeset
887
1012
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parents: 1009
diff changeset
888 /**
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
889 * Returns a value corresponding to a key in a JSON object.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
890 *
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parents: 1009
diff changeset
891 * If the value is not a JSON object, the behavior is undefined.
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
892 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
893 * This function guarantees to return a JSON value. If the
21884374edbb add documentation - resolves #431
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parents: 1009
diff changeset
894 * object does not contain \p name, the returned JSON value
21884374edbb add documentation - resolves #431
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parents: 1009
diff changeset
895 * will be of type #CX_JSON_NOTHING, but never \c NULL.
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
896 *
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
897 * @param value the JSON object
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
898 * @param name the key to look up
21884374edbb add documentation - resolves #431
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parents: 1009
diff changeset
899 * @return the value corresponding to the key
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parents: 1009
diff changeset
900 * @see cxJsonIsObject()
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Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
901 */
985
68754c7de906 major refactoring of attributes
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parents: 974
diff changeset
902 cx_attr_nonnull
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
903 cx_attr_returns_nonnull
68754c7de906 major refactoring of attributes
Mike Becker <universe@uap-core.de>
parents: 974
diff changeset
904 cx_attr_cstr_arg(2)
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
905 CxJsonValue *cxJsonObjGet(const CxJsonValue *value, const char* name);
937
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parents:
diff changeset
906
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
907 #ifdef __cplusplus
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parents:
diff changeset
908 }
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parents:
diff changeset
909 #endif
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parents:
diff changeset
910
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parents:
diff changeset
911 #endif /* UCX_JSON_H */
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
912

mercurial