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Added parameter to DynamicJsonBuffer constructor to set initial size (issue #152)

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Benoit Blanchon
2015-11-09 21:37:40 +01:00
parent b7d9bb2765
commit ba3617c22f
3 changed files with 17 additions and 10 deletions
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11
include/ArduinoJson/Internals/BlockJsonBuffer.hpp
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@ -31,7 +31,8 @@ class BlockJsonBuffer : public JsonBuffer {
};
public:
BlockJsonBuffer() : _head(NULL) {}
BlockJsonBuffer(size_t initialSize = 256)
: _head(NULL), _nextBlockSize(initialSize) {}
~BlockJsonBuffer() {
Block* currentBlock = _head;
@ -55,8 +56,6 @@ class BlockJsonBuffer : public JsonBuffer {
}
private:
static const size_t FIRST_BLOCK_CAPACITY = 32;
bool canAllocInHead(size_t bytes) const {
return _head != NULL && _head->size + bytes <= _head->capacity;
}
@ -68,10 +67,11 @@ class BlockJsonBuffer : public JsonBuffer {
}
void* allocInNewBlock(size_t bytes) {
size_t capacity = FIRST_BLOCK_CAPACITY;
size_t capacity = _nextBlockSize;
if (_head != NULL) capacity = _head->capacity * 2;
if (bytes > capacity) capacity = bytes;
if (!addNewBlock(capacity)) return NULL;
_nextBlockSize *= 2;
return allocInHead(bytes);
}
@ -86,8 +86,9 @@ class BlockJsonBuffer : public JsonBuffer {
return true;
}
Block* _head;
TAllocator _allocator;
Block* _head;
size_t _nextBlockSize;
};
}
}