mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
David Vacca
91b3f5d48a
Summary: This diff contains the code from the 35 diff stack - D27210587 This diff implement and integrates Mapbuffer into Fabric text measure system changelog: [internal] internal Reviewed By: JoshuaGross Differential Revision: D27241836 fbshipit-source-id: f40a780df0723f27da440f709a8676cfcca63953
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/renderer/mapbuffer/MapBuffer.h>
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#include <react/renderer/mapbuffer/primitives.h>
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namespace facebook {
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namespace react {
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// Default initial size for _keyValues array
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// 106 = 10 entries = 10*10 + 6 sizeof(header)
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constexpr uint16_t INITIAL_KEY_VALUE_SIZE = 106;
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// Default initial size for _dynamicDataValues array
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constexpr int INITIAL_DYNAMIC_DATA_SIZE = 200;
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/**
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* MapBufferBuilder is a builder class for MapBuffer
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*/
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class MapBufferBuilder {
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private:
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Header _header = {ALIGNMENT, 0, 0};
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void ensureKeyValueSpace();
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void ensureDynamicDataSpace(int size);
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void storeKeyValue(Key key, uint8_t *value, int valueSize);
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// Array of [key,value] map entries:
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// - Key is represented in 2 bytes
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// - Value is stored into 8 bytes. The 8 bytes of the value will contain the
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// actual value for the key or a pointer to the actual value (based on the
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// type)
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uint8_t *_keyValues;
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// Amount of bytes allocated on _keyValues
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uint16_t _keyValuesSize;
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// Relative offset on the _keyValues array.
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// This represents the first byte that can be written in _keyValues array
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int _keyValuesOffset;
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// This array contains data for dynamic values in the MapBuffer.
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// A dynamic value is a String or another MapBuffer.
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uint8_t *_dynamicDataValues;
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// Amount of bytes allocated on _dynamicDataValues
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uint16_t _dynamicDataSize;
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// Relative offset on the _dynamicDataValues array.
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// This represents the first byte that can be written in _dynamicDataValues
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// array
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int _dynamicDataOffset;
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// Minimmum key to store in the MapBuffer (this is used to guarantee
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// consistency)
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uint16_t _minKeyToStore = 0;
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public:
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MapBufferBuilder();
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MapBufferBuilder(uint16_t initialSize);
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~MapBufferBuilder();
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static MapBuffer EMPTY();
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void putInt(Key key, int value);
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void putBool(Key key, bool value);
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void putDouble(Key key, double value);
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void putNull(Key key);
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void putString(Key key, std::string value);
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void putMapBuffer(Key key, MapBuffer &map);
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// TODO This should return MapBuffer!
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MapBuffer build();
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};
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} // namespace react
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} // namespace facebook
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