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王立帮
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// ArduinoJson - arduinojson.org
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// Copyright Benoit Blanchon 2014-2020
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// MIT License
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#pragma once
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#include <ArduinoJson/Object/ObjectFunctions.hpp>
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#include <ArduinoJson/Object/ObjectIterator.hpp>
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// Returns the size (in bytes) of an object with n elements.
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// Can be very handy to determine the size of a StaticMemoryPool.
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#define JSON_OBJECT_SIZE(NUMBER_OF_ELEMENTS) \
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((NUMBER_OF_ELEMENTS) * sizeof(ARDUINOJSON_NAMESPACE::VariantSlot))
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namespace ARDUINOJSON_NAMESPACE {
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template <typename TData>
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class ObjectRefBase {
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public:
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operator VariantConstRef() const {
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const void* data = _data; // prevent warning cast-align
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return VariantConstRef(reinterpret_cast<const VariantData*>(data));
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}
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template <typename TVisitor>
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typename TVisitor::result_type accept(TVisitor& visitor) const {
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return objectAccept(_data, visitor);
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}
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FORCE_INLINE bool isNull() const {
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return _data == 0;
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}
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FORCE_INLINE operator bool() const {
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return _data != 0;
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}
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FORCE_INLINE size_t memoryUsage() const {
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return _data ? _data->memoryUsage() : 0;
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}
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FORCE_INLINE size_t nesting() const {
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return _data ? _data->nesting() : 0;
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}
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FORCE_INLINE size_t size() const {
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return _data ? _data->size() : 0;
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}
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protected:
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ObjectRefBase(TData* data) : _data(data) {}
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TData* _data;
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};
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class ObjectConstRef : public ObjectRefBase<const CollectionData>,
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public Visitable {
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friend class ObjectRef;
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typedef ObjectRefBase<const CollectionData> base_type;
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public:
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typedef ObjectConstIterator iterator;
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ObjectConstRef() : base_type(0) {}
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ObjectConstRef(const CollectionData* data) : base_type(data) {}
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FORCE_INLINE iterator begin() const {
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if (!_data)
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return iterator();
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return iterator(_data->head());
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}
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FORCE_INLINE iterator end() const {
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return iterator();
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}
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// containsKey(const std::string&) const
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// containsKey(const String&) const
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template <typename TString>
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FORCE_INLINE bool containsKey(const TString& key) const {
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return !getMember(key).isUndefined();
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}
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// containsKey(char*) const
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// containsKey(const char*) const
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// containsKey(const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE bool containsKey(TChar* key) const {
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return !getMember(key).isUndefined();
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}
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// getMember(const std::string&) const
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// getMember(const String&) const
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template <typename TString>
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FORCE_INLINE VariantConstRef getMember(const TString& key) const {
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return get_impl(adaptString(key));
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}
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// getMember(char*) const
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// getMember(const char*) const
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// getMember(const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE VariantConstRef getMember(TChar* key) const {
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return get_impl(adaptString(key));
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}
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// operator[](const std::string&) const
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// operator[](const String&) const
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template <typename TString>
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FORCE_INLINE
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typename enable_if<IsString<TString>::value, VariantConstRef>::type
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operator[](const TString& key) const {
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return get_impl(adaptString(key));
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}
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// operator[](char*) const
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// operator[](const char*) const
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// operator[](const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE
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typename enable_if<IsString<TChar*>::value, VariantConstRef>::type
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operator[](TChar* key) const {
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return get_impl(adaptString(key));
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}
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FORCE_INLINE bool operator==(ObjectConstRef rhs) const {
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return objectEquals(_data, rhs._data);
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}
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private:
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template <typename TAdaptedString>
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FORCE_INLINE VariantConstRef get_impl(TAdaptedString key) const {
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return VariantConstRef(objectGetMember(_data, key));
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}
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};
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class ObjectRef : public ObjectRefBase<CollectionData>,
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public ObjectShortcuts<ObjectRef>,
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public Visitable {
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typedef ObjectRefBase<CollectionData> base_type;
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public:
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typedef ObjectIterator iterator;
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FORCE_INLINE ObjectRef() : base_type(0), _pool(0) {}
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FORCE_INLINE ObjectRef(MemoryPool* buf, CollectionData* data)
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: base_type(data), _pool(buf) {}
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operator VariantRef() const {
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void* data = _data; // prevent warning cast-align
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return VariantRef(_pool, reinterpret_cast<VariantData*>(data));
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}
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operator ObjectConstRef() const {
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return ObjectConstRef(_data);
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}
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FORCE_INLINE iterator begin() const {
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if (!_data)
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return iterator();
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return iterator(_pool, _data->head());
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}
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FORCE_INLINE iterator end() const {
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return iterator();
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}
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void clear() const {
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if (!_data)
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return;
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_data->clear();
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}
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FORCE_INLINE bool set(ObjectConstRef src) {
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if (!_data || !src._data)
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return false;
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return _data->copyFrom(*src._data, _pool);
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}
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// getMember(const std::string&) const
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// getMember(const String&) const
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template <typename TString>
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FORCE_INLINE VariantRef getMember(const TString& key) const {
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return VariantRef(_pool, objectGetMember(_data, adaptString(key)));
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}
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// getMember(char*) const
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// getMember(const char*) const
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// getMember(const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE VariantRef getMember(TChar* key) const {
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return VariantRef(_pool, objectGetMember(_data, adaptString(key)));
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}
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// getOrAddMember(const std::string&) const
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// getOrAddMember(const String&) const
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template <typename TString>
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FORCE_INLINE VariantRef getOrAddMember(const TString& key) const {
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return VariantRef(_pool,
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objectGetOrAddMember(_data, adaptString(key), _pool));
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}
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// getOrAddMember(char*) const
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// getOrAddMember(const char*) const
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// getOrAddMember(const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE VariantRef getOrAddMember(TChar* key) const {
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return VariantRef(_pool,
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objectGetOrAddMember(_data, adaptString(key), _pool));
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}
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FORCE_INLINE bool operator==(ObjectRef rhs) const {
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return objectEquals(_data, rhs._data);
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}
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FORCE_INLINE void remove(iterator it) const {
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if (!_data)
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return;
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_data->removeSlot(it.internal());
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}
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// remove(const std::string&) const
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// remove(const String&) const
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template <typename TString>
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FORCE_INLINE void remove(const TString& key) const {
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objectRemove(_data, adaptString(key));
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}
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// remove(char*) const
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// remove(const char*) const
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// remove(const __FlashStringHelper*) const
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template <typename TChar>
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FORCE_INLINE void remove(TChar* key) const {
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objectRemove(_data, adaptString(key));
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}
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private:
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MemoryPool* _pool;
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};
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} // namespace ARDUINOJSON_NAMESPACE
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