Mercurial > code
annotate C++/modules/Json/Json.cpp @ 445:f5e62f6c1475
Json: add escape free function
| author | David Demelier <markand@malikania.fr> |
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| date | Mon, 26 Oct 2015 19:29:34 +0100 |
| parents | d485d36a8de1 |
| children | 902b034df6e3 |
| rev | line source |
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1 /* |
| 405 | 2 * Json.cpp -- C++14 JSON manipulation using jansson parser |
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3 * |
| 403 | 4 * Copyright (c) 2013-2015 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
| 405 | 19 #include "Json.h" |
| 314 | 20 |
| 405 | 21 #include <jansson.h> |
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22 |
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23 namespace json { |
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24 |
| 405 | 25 namespace { |
| 26 | |
| 27 void readObject(Value &parent, json_t *object); | |
| 28 void readArray(Value &parent, json_t *array); | |
| 29 | |
| 30 Value readValue(json_t *v) | |
| 31 { | |
| 32 if (json_is_null(v)) { | |
| 33 return Value{nullptr}; | |
| 34 } | |
| 35 if (json_is_string(v)) { | |
| 36 return Value{json_string_value(v)}; | |
| 37 } | |
| 406 | 38 if (json_is_real(v)) { |
| 405 | 39 return Value{json_number_value(v)}; |
| 40 } | |
| 406 | 41 if (json_is_integer(v)) { |
| 42 return Value{static_cast<int>(json_integer_value(v))}; | |
| 43 } | |
| 405 | 44 if (json_is_boolean(v)) { |
| 45 return Value{json_boolean_value(v)}; | |
| 46 } | |
| 47 if (json_is_object(v)) { | |
| 48 Object object; | |
| 49 | |
| 50 readObject(object, v); | |
| 51 | |
| 52 return object; | |
| 53 } | |
| 54 if (json_is_array(v)) { | |
| 55 Array array; | |
| 56 | |
| 57 readArray(array, v); | |
| 58 | |
| 59 return array; | |
| 60 } | |
| 61 | |
| 62 return Value{}; | |
| 63 } | |
| 64 | |
| 65 void readObject(Value &parent, json_t *object) | |
| 66 { | |
| 67 const char *key; | |
| 68 json_t *value; | |
| 69 | |
| 70 json_object_foreach(object, key, value) { | |
| 71 static_cast<Object &>(parent).insert(key, readValue(value)); | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 void readArray(Value &parent, json_t *array) | |
| 76 { | |
| 77 size_t index; | |
| 78 json_t *value; | |
| 79 | |
| 80 json_array_foreach(array, index, value) { | |
| 81 static_cast<Array &>(parent).append(readValue(value)); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 template <typename Func, typename... Args> | |
| 86 Value convert(Func fn, Args&&... args) | |
| 87 { | |
| 88 json_error_t error; | |
| 89 json_t *json = fn(std::forward<Args>(args)..., &error); | |
| 90 | |
| 91 if (json == nullptr) { | |
| 92 throw Error{error.text, error.source, error.line, error.column, error.position}; | |
| 93 } | |
| 94 | |
| 95 Value value; | |
| 96 | |
| 97 if (json_is_object(json)) { | |
| 98 value = Object{}; | |
| 99 readObject(value, json); | |
| 100 } else { | |
| 101 value = Array{}; | |
| 102 readArray(value, json); | |
| 103 } | |
| 104 | |
| 105 json_decref(json); | |
| 106 | |
| 107 return value; | |
| 108 } | |
| 109 | |
| 110 } // !namespace | |
| 111 | |
| 112 bool Value::toBool() const noexcept | |
| 113 { | |
| 406 | 114 if (m_type != Type::Boolean) { |
| 405 | 115 return false; |
| 406 | 116 } |
| 405 | 117 |
| 118 return m_boolean; | |
| 119 } | |
| 120 | |
| 406 | 121 double Value::toReal() const noexcept |
| 405 | 122 { |
| 406 | 123 if (m_type != Type::Real) { |
| 405 | 124 return 0; |
| 406 | 125 } |
| 405 | 126 |
| 127 return m_number; | |
| 128 } | |
| 129 | |
| 406 | 130 int Value::toInt() const noexcept |
| 131 { | |
| 132 if (m_type != Type::Int) { | |
| 133 return 0; | |
| 134 } | |
| 135 | |
| 136 return m_integer; | |
| 137 } | |
| 138 | |
| 405 | 139 std::string Value::toString() const noexcept |
| 140 { | |
| 141 if (m_type != Type::String) { | |
| 142 return ""; | |
| 143 } | |
| 144 | |
| 145 return m_string; | |
| 146 } | |
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147 |
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148 Object Value::toObject() const noexcept |
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149 { |
| 405 | 150 if (m_type != Type::Object) { |
| 151 return Object{}; | |
| 152 } | |
| 311 | 153 |
| 405 | 154 return Object(*this); |
| 311 | 155 } |
| 156 | |
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157 Array Value::toArray() const noexcept |
| 311 | 158 { |
| 405 | 159 if (m_type != Type::Array) { |
| 160 return Array{}; | |
| 161 } | |
| 314 | 162 |
| 405 | 163 return Array(*this); |
| 311 | 164 } |
| 165 | |
| 405 | 166 Document::Document(Buffer buffer) |
| 311 | 167 { |
| 405 | 168 m_value = convert(json_loads, buffer.text.c_str(), 0); |
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169 } |
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170 |
| 405 | 171 Document::Document(File file) |
| 314 | 172 { |
| 405 | 173 m_value = convert(json_load_file, file.path.c_str(), 0); |
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174 } |
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175 |
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176 std::string escape(std::string value) noexcept |
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177 { |
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178 for (auto it = value.begin(); it != value.end(); ++it) { |
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179 switch (*it) { |
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180 case '\\': |
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181 case '/': |
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182 case '"': |
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183 it = value.insert(it, '\\'); |
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184 it++; |
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185 break; |
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186 case '\b': |
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187 value.replace(it, it + 1, "\\b"); |
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188 it += 1; |
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189 break; |
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190 case '\f': |
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191 value.replace(it, it + 1, "\\f"); |
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192 it += 1; |
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193 break; |
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194 case '\n': |
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195 value.replace(it, it + 1, "\\n"); |
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196 it += 1; |
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197 break; |
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198 case '\r': |
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199 value.replace(it, it + 1, "\\r"); |
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200 it += 1; |
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201 break; |
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202 case '\t': |
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203 value.replace(it, it + 1, "\\t"); |
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204 it += 1; |
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205 break; |
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206 default: |
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207 break; |
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208 } |
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209 } |
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210 |
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211 return value; |
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212 } |
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213 |
| 406 | 214 } // !json |