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https://github.com/eledio-devices/thirdparty-ArduinoJson.git
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107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
// Copyright Benoit Blanchon 2014-2015
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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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#pragma once
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#include <stddef.h>
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#include <stdint.h> // for uint8_t
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#include "Internals/JsonPrintable.hpp"
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#include "Internals/JsonVariantContent.hpp"
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#include "Internals/JsonVariantType.hpp"
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#include "Internals/Unparsed.hpp"
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#include "JsonVariantBase.hpp"
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namespace ArduinoJson {
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// Forward declarations.
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class JsonArray;
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class JsonObject;
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// A variant that can be a any value serializable to a JSON value.
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//
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// It can be set to:
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// - a boolean
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// - a char, short, int or a long (signed or unsigned)
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// - a string (const char*)
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// - a reference to a JsonArray or JsonObject
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class JsonVariant : public JsonVariantBase<JsonVariant> {
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public:
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// Creates an uninitialized JsonVariant
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FORCE_INLINE JsonVariant() : _type(Internals::JSON_UNDEFINED) {}
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// Create a JsonVariant containing a boolean value.
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// It will be serialized as "true" or "false" in JSON.
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FORCE_INLINE JsonVariant(bool value);
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// Create a JsonVariant containing a floating point value.
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// The second argument specifies the number of decimal digits to write in
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// the JSON string.
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FORCE_INLINE JsonVariant(float value, uint8_t decimals = 2);
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FORCE_INLINE JsonVariant(double value, uint8_t decimals = 2);
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// Create a JsonVariant containing an integer value.
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FORCE_INLINE JsonVariant(signed char value);
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FORCE_INLINE JsonVariant(signed long value);
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FORCE_INLINE JsonVariant(signed int value);
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FORCE_INLINE JsonVariant(signed short value);
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FORCE_INLINE JsonVariant(unsigned char value);
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FORCE_INLINE JsonVariant(unsigned long value);
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FORCE_INLINE JsonVariant(unsigned int value);
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FORCE_INLINE JsonVariant(unsigned short value);
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// Create a JsonVariant containing a string.
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FORCE_INLINE JsonVariant(const char *value);
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// Create a JsonVariant containing an unparsed string
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FORCE_INLINE JsonVariant(Internals::Unparsed value);
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// Create a JsonVariant containing a reference to an array.
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FORCE_INLINE JsonVariant(JsonArray &array);
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// Create a JsonVariant containing a reference to an object.
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FORCE_INLINE JsonVariant(JsonObject &object);
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// Get the variant as the specified type.
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// See cast operators for details.
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template <typename T>
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T as() const;
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// Tells weither the variant has the specified type.
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// Returns true if the variant has type type T, false otherwise.
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template <typename T>
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bool is() const;
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// Serialize the variant to a JsonWriter
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void writeTo(Internals::JsonWriter &writer) const;
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// TODO: rename
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template <typename T>
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static T invalid();
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private:
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Internals::JsonFloat asFloat() const;
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Internals::JsonInteger asInteger() const;
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// The current type of the variant
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Internals::JsonVariantType _type;
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// The various alternatives for the value of the variant.
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Internals::JsonVariantContent _content;
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};
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inline JsonVariant float_with_n_digits(float value, uint8_t digits) {
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return JsonVariant(value, digits);
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}
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inline JsonVariant double_with_n_digits(double value, uint8_t digits) {
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return JsonVariant(value, digits);
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}
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}
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// Include inline implementations
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#include "JsonVariant.ipp"
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