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[209] | 1 | // Copyright Benoit Blanchon 2014-2016
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| 2 | // MIT License
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| 3 | //
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| 4 | // Arduino JSON library
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| 5 | // https://github.com/bblanchon/ArduinoJson
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| 6 | // If you like this project, please add a star!
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| 7 |
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| 8 | #pragma once
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| 9 |
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| 10 | #include "JsonBuffer.hpp"
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| 11 |
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| 12 | namespace ArduinoJson {
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| 13 |
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| 14 | // Implements a JsonBuffer with fixed memory allocation.
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| 15 | // The template paramenter CAPACITY specifies the capacity of the buffer in
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| 16 | // bytes.
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| 17 | template <size_t CAPACITY>
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| 18 | class StaticJsonBuffer : public JsonBuffer {
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| 19 | public:
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| 20 | explicit StaticJsonBuffer() : _size(0) {}
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| 21 |
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| 22 | size_t capacity() const { return CAPACITY; }
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| 23 | size_t size() const { return _size; }
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| 24 |
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| 25 | virtual void* alloc(size_t bytes) {
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| 26 | if (_size + bytes > CAPACITY) return NULL;
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| 27 | void* p = &_buffer[_size];
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| 28 | _size += round_size_up(bytes);
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| 29 | return p;
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| 30 | }
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| 31 |
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| 32 | private:
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| 33 | uint8_t _buffer[CAPACITY];
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| 34 | size_t _size;
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| 35 | };
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| 36 | }
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