forked from bblanchon/ArduinoJson
126 lines
3.2 KiB
C++
126 lines
3.2 KiB
C++
// Copyright Benoit Blanchon 2014
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// MIT License
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//
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// Arduino JSON library
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// https://github.com/bblanchon/ArduinoJson
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#include "../include/ArduinoJson/JsonVariant.hpp"
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#include "../include/ArduinoJson/Internals/PrettyJsonWriter.hpp"
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#include "../include/ArduinoJson/JsonArray.hpp"
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#include "../include/ArduinoJson/JsonObject.hpp"
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using namespace ArduinoJson;
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using namespace ArduinoJson::Internals;
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JsonVariant JsonVariant::_invalid(JSON_INVALID);
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JsonVariant::operator JsonArray &() const {
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return _type == JSON_ARRAY ? *_content.asArray : JsonArray::invalid();
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}
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JsonVariant::operator JsonObject &() const {
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return _type == JSON_OBJECT ? *_content.asObject : JsonObject::invalid();
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}
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JsonVariant::operator bool() const {
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return _type == JSON_BOOLEAN ? _content.asBoolean : false;
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}
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JsonVariant::operator const char *() const {
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return _type == JSON_STRING ? _content.asString : NULL;
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}
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JsonVariant::operator double() const {
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return _type >= JSON_DOUBLE_0_DECIMALS ? _content.asDouble : 0;
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}
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JsonVariant::operator long() const {
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return _type == JSON_LONG ? _content.asLong : 0;
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}
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void JsonVariant::set(bool value) {
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if (_type == JSON_INVALID) return;
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_type = Internals::JSON_BOOLEAN;
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_content.asBoolean = value;
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}
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void JsonVariant::set(const char *value) {
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if (_type == JSON_INVALID) return;
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_type = JSON_STRING;
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_content.asString = value;
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}
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void JsonVariant::set(double value, uint8_t decimals) {
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if (_type == JSON_INVALID) return;
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_type = static_cast<JsonVariantType>(JSON_DOUBLE_0_DECIMALS + decimals);
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_content.asDouble = value;
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}
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void JsonVariant::set(long value) {
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if (_type == JSON_INVALID) return;
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_type = JSON_LONG;
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_content.asLong = value;
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}
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void JsonVariant::set(JsonArray &array) {
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if (_type == JSON_INVALID) return;
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_type = JSON_ARRAY;
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_content.asArray = &array;
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}
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void JsonVariant::set(JsonObject &object) {
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if (_type == JSON_INVALID) return;
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_type = JSON_OBJECT;
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_content.asObject = &object;
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}
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size_t JsonVariant::size() const {
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if (_type == JSON_ARRAY) return _content.asArray->size();
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if (_type == JSON_OBJECT) return _content.asObject->size();
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return 0;
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}
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JsonVariant &JsonVariant::operator[](int index) {
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if (_type != JSON_ARRAY) return JsonVariant::invalid();
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return _content.asArray->operator[](index);
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}
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JsonVariant &JsonVariant::operator[](const char *key) {
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if (_type != JSON_OBJECT) return JsonVariant::invalid();
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return _content.asObject->operator[](key);
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}
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template <typename T>
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void JsonVariant::writeTo(T &writer) const {
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switch (_type) {
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case JSON_ARRAY:
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_content.asArray->writeTo(writer);
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break;
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case JSON_OBJECT:
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_content.asObject->writeTo(writer);
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break;
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case JSON_STRING:
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writer.writeString(_content.asString);
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break;
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case JSON_LONG:
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writer.writeLong(_content.asLong);
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break;
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case JSON_BOOLEAN:
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writer.writeBoolean(_content.asBoolean);
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break;
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default: // >= JSON_DOUBLE_0_DECIMALS
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uint8_t decimals = static_cast<uint8_t>(_type - JSON_DOUBLE_0_DECIMALS);
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writer.writeDouble(_content.asDouble, decimals);
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break;
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}
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}
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template void JsonVariant::writeTo(JsonWriter &) const;
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template void JsonVariant::writeTo(PrettyJsonWriter &) const;
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