4403824802

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github

Committed by Benoit Blanchon

Commit Message

Fix Clang3.8

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98.84

/src/ArduinoJson/Document/BasicJsonDocument.hpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2023, Benoit BLANCHON
// MIT License

#pragma once

#include <ArduinoJson/Document/JsonDocument.hpp>

ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE

// Helper to implement the "base-from-member" idiom
// (we need to store the allocator before constructing JsonDocument)
template <typename TAllocator>
class AllocatorOwner {
 public:
  AllocatorOwner() {}
  AllocatorOwner(TAllocator a) : _allocator(a) {}

  void* allocate(size_t size) {
    return _allocator.allocate(size);
  }

  void deallocate(void* ptr) {
    if (ptr)
      _allocator.deallocate(ptr);
  }

  void* reallocate(void* ptr, size_t new_size) {
    return _allocator.reallocate(ptr, new_size);
  }

  TAllocator& allocator() {
    return _allocator;
  }

 private:
  TAllocator _allocator;
};

// A JsonDocument that uses the provided allocator to allocate its memory pool.
// https://arduinojson.org/v6/api/basicjsondocument/
template <typename TAllocator>
class BasicJsonDocument : AllocatorOwner<TAllocator>, public JsonDocument {
 public:
  explicit BasicJsonDocument(size_t capa, TAllocator alloc = TAllocator())
      : AllocatorOwner<TAllocator>(alloc), JsonDocument(allocPool(capa)) {}

  // Copy-constructor
  BasicJsonDocument(const BasicJsonDocument& src)
      : AllocatorOwner<TAllocator>(src), JsonDocument() {
    copyAssignFrom(src);
  }

  // Move-constructor
  BasicJsonDocument(BasicJsonDocument&& src) : AllocatorOwner<TAllocator>(src) {
    moveAssignFrom(src);
  }

  BasicJsonDocument(const JsonDocument& src) {
    copyAssignFrom(src);
  }

  // Construct from variant, array, or object
  template <typename T>
  BasicJsonDocument(const T& src,
                    typename detail::enable_if<
                        detail::is_same<T, JsonVariant>::value ||
                        detail::is_same<T, JsonVariantConst>::value ||
                        detail::is_same<T, JsonArray>::value ||
                        detail::is_same<T, JsonArrayConst>::value ||
                        detail::is_same<T, JsonObject>::value ||
                        detail::is_same<T, JsonObjectConst>::value>::type* = 0)
      : JsonDocument(allocPool(src.memoryUsage())) {
    set(src);
  }

  // disambiguate
  BasicJsonDocument(JsonVariant src)
      : JsonDocument(allocPool(src.memoryUsage())) {
    set(src);
  }

  ~BasicJsonDocument() {
    freePool();
  }

  BasicJsonDocument& operator=(const BasicJsonDocument& src) {
    copyAssignFrom(src);
    return *this;
  }

  BasicJsonDocument& operator=(BasicJsonDocument&& src) {
    moveAssignFrom(src);
    return *this;
  }

  template <typename T>
  BasicJsonDocument& operator=(const T& src) {
    size_t requiredSize = src.memoryUsage();
    if (requiredSize > capacity())
      reallocPool(requiredSize);
    set(src);
    return *this;
  }

  // Reduces the capacity of the memory pool to match the current usage.
  // https://arduinojson.org/v6/api/basicjsondocument/shrinktofit/
  void shrinkToFit() {
    ptrdiff_t bytes_reclaimed = _pool.squash();
    if (bytes_reclaimed == 0)
      return;

    void* old_ptr = _pool.buffer();
    void* new_ptr = this->reallocate(old_ptr, _pool.capacity());

    ptrdiff_t ptr_offset =
        static_cast<char*>(new_ptr) - static_cast<char*>(old_ptr);

    _pool.movePointers(ptr_offset);
    _data.movePointers(ptr_offset, ptr_offset - bytes_reclaimed);
  }

  // Reclaims the memory leaked when removing and replacing values.
  // https://arduinojson.org/v6/api/jsondocument/garbagecollect/
  bool garbageCollect() {
    // make a temporary clone and move assign
    BasicJsonDocument tmp(*this);
    if (!tmp.capacity())
      return false;
    tmp.set(*this);
    moveAssignFrom(tmp);
    return true;
  }

  using AllocatorOwner<TAllocator>::allocator;

 private:
  detail::MemoryPool allocPool(size_t requiredSize) {
    size_t capa = detail::addPadding(requiredSize);
    return {reinterpret_cast<char*>(this->allocate(capa)), capa};
  }

  void reallocPool(size_t requiredSize) {
    size_t capa = detail::addPadding(requiredSize);
    if (capa == _pool.capacity())
      return;
    freePool();
    replacePool(allocPool(detail::addPadding(requiredSize)));
  }

  void freePool() {
    this->deallocate(getPool()->buffer());
  }

  void copyAssignFrom(const JsonDocument& src) {
    reallocPool(src.capacity());
    set(src);
  }

  void moveAssignFrom(BasicJsonDocument& src) {
    freePool();
    _data = src._data;
    _pool = src._pool;
    src._data.setNull();
    src._pool = {0, 0};
  }
};

ARDUINOJSON_END_PUBLIC_NAMESPACE

1	// ArduinoJson - https://arduinojson.org
2	// Copyright © 2014-2023, Benoit BLANCHON
3	// MIT License
4
5	#pragma once
6
7	#include <ArduinoJson/Document/JsonDocument.hpp>
8
9	ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
10
11	// Helper to implement the "base-from-member" idiom
12	// (we need to store the allocator before constructing JsonDocument)
13	template <typename TAllocator>
14	class AllocatorOwner {
15	public:
16	AllocatorOwner() {}	4✔
17	AllocatorOwner(TAllocator a) : _allocator(a) {}	1,423✔
18
19	void* allocate(size_t size) {	1,436✔
20	return _allocator.allocate(size);	1,436✔
21	}
22
23	void deallocate(void* ptr) {	1,451✔
24	if (ptr)	1,451✔
25	_allocator.deallocate(ptr);	1,435✔
26	}	1,451✔
27
28	void* reallocate(void* ptr, size_t new_size) {	15✔
29	return _allocator.reallocate(ptr, new_size);	15✔
30	}
31
32	TAllocator& allocator() {	1✔
33	return _allocator;	1✔
34	}
35
36	private:
37	TAllocator _allocator;
38	};
39
40	// A JsonDocument that uses the provided allocator to allocate its memory pool.
41	// https://arduinojson.org/v6/api/basicjsondocument/
42	template <typename TAllocator>
43	class BasicJsonDocument : AllocatorOwner<TAllocator>, public JsonDocument {
44	public:
45	explicit BasicJsonDocument(size_t capa, TAllocator alloc = TAllocator())	1,423✔
46	: AllocatorOwner<TAllocator>(alloc), JsonDocument(allocPool(capa)) {}	1,423✔
47
48	// Copy-constructor
49	BasicJsonDocument(const BasicJsonDocument& src)	5✔
50	: AllocatorOwner<TAllocator>(src), JsonDocument() {	5✔
51	copyAssignFrom(src);	5✔
52	}	5✔
53
54	// Move-constructor
55	BasicJsonDocument(BasicJsonDocument&& src) : AllocatorOwner<TAllocator>(src) {	2✔
56	moveAssignFrom(src);	2✔
57	}	2✔
58
59	BasicJsonDocument(const JsonDocument& src) {	1✔
60	copyAssignFrom(src);	1✔
61	}	1✔
62
63	// Construct from variant, array, or object
64	template <typename T>
65	BasicJsonDocument(const T& src,	2✔
66	typename detail::enable_if<
67	detail::is_same<T, JsonVariant>::value \|\|
68	detail::is_same<T, JsonVariantConst>::value \|\|
69	detail::is_same<T, JsonArray>::value \|\|
70	detail::is_same<T, JsonArrayConst>::value \|\|
71	detail::is_same<T, JsonObject>::value \|\|
72	detail::is_same<T, JsonObjectConst>::value>::type* = 0)
73	: JsonDocument(allocPool(src.memoryUsage())) {	4✔
74	set(src);	2✔
75	}	2✔
76
77	// disambiguate
78	BasicJsonDocument(JsonVariant src)	1✔
79	: JsonDocument(allocPool(src.memoryUsage())) {	2✔
80	set(src);	1✔
81	}	1✔
82
83	~BasicJsonDocument() {	1,434✔
84	freePool();	1,434✔
85	}	1,434✔
86
87	BasicJsonDocument& operator=(const BasicJsonDocument& src) {	5✔
88	copyAssignFrom(src);	5✔
89	return *this;	5✔
90	}
91
92	BasicJsonDocument& operator=(BasicJsonDocument&& src) {	3✔
93	moveAssignFrom(src);	3✔
94	return *this;	3✔
95	}
96
97	template <typename T>
98	BasicJsonDocument& operator=(const T& src) {	11✔
99	size_t requiredSize = src.memoryUsage();	11✔
100	if (requiredSize > capacity())	11✔
101	reallocPool(requiredSize);	×
102	set(src);	11✔
103	return *this;	11✔
104	}
105
106	// Reduces the capacity of the memory pool to match the current usage.
107	// https://arduinojson.org/v6/api/basicjsondocument/shrinktofit/
108	void shrinkToFit() {	30✔
109	ptrdiff_t bytes_reclaimed = _pool.squash();	30✔
110	if (bytes_reclaimed == 0)	30✔
111	return;	15✔
112
113	void* old_ptr = _pool.buffer();	15✔
114	void* new_ptr = this->reallocate(old_ptr, _pool.capacity());	15✔
115
116	ptrdiff_t ptr_offset =	15✔
117	static_cast<char>(new_ptr) - static_cast<char>(old_ptr);
118
119	_pool.movePointers(ptr_offset);	15✔
120	_data.movePointers(ptr_offset, ptr_offset - bytes_reclaimed);	15✔
121	}
122
123	// Reclaims the memory leaked when removing and replacing values.
124	// https://arduinojson.org/v6/api/jsondocument/garbagecollect/
125	bool garbageCollect() {	3✔
126	// make a temporary clone and move assign
127	BasicJsonDocument tmp(*this);	6✔
128	if (!tmp.capacity())	3✔
129	return false;	1✔
130	tmp.set(*this);	2✔
131	moveAssignFrom(tmp);	2✔
132	return true;	2✔
133	}
134
135	using AllocatorOwner<TAllocator>::allocator;
136
137	private:
138	detail::MemoryPool allocPool(size_t requiredSize) {	1,436✔
139	size_t capa = detail::addPadding(requiredSize);	1,436✔
140	return {reinterpret_cast<char*>(this->allocate(capa)), capa};	1,436✔
141	}
142
143	void reallocPool(size_t requiredSize) {	11✔
144	size_t capa = detail::addPadding(requiredSize);	11✔
145	if (capa == _pool.capacity())	11✔
146	return;	1✔
147	freePool();	10✔
148	replacePool(allocPool(detail::addPadding(requiredSize)));	10✔
149	}
150
151	void freePool() {	1,451✔
152	this->deallocate(getPool()->buffer());	1,451✔
153	}	1,451✔
154
155	void copyAssignFrom(const JsonDocument& src) {	11✔
156	reallocPool(src.capacity());	11✔
157	set(src);	11✔
158	}	11✔
159
160	void moveAssignFrom(BasicJsonDocument& src) {	7✔
161	freePool();	7✔
162	_data = src._data;	7✔
163	_pool = src._pool;	7✔
164	src._data.setNull();	7✔
165	src._pool = {0, 0};	7✔
166	}	7✔
167	};
168
169	ARDUINOJSON_END_PUBLIC_NAMESPACE

bblanchon / ArduinoJson / 4403824802

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