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88 lines
3.6 KiB
88 lines
3.6 KiB
/****************************************************************************
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Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
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http://www.cocos.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include "base/Macros.h"
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#include "base/std/variant.h"
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#include "core/ArrayBuffer.h"
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namespace cc {
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class DataView final {
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public:
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DataView() = default;
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explicit DataView(ArrayBuffer *buffer);
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DataView(ArrayBuffer *buffer, uint32_t byteOffset);
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DataView(ArrayBuffer *buffer, uint32_t byteOffset, uint32_t byteLength);
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~DataView() = default;
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void assign(ArrayBuffer *buffer);
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void assign(ArrayBuffer *buffer, uint32_t byteOffset);
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void assign(ArrayBuffer *buffer, uint32_t byteOffset, uint32_t byteLength);
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uint8_t getUint8(uint32_t offset) const;
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uint16_t getUint16(uint32_t offset) const;
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uint32_t getUint32(uint32_t offset) const;
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int8_t getInt8(uint32_t offset) const;
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int16_t getInt16(uint32_t offset) const;
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int32_t getInt32(uint32_t offset) const;
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float getFloat32(uint32_t offset) const;
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void setUint8(uint32_t offset, uint8_t value);
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void setUint16(uint32_t offset, uint16_t value);
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void setUint32(uint32_t offset, uint32_t value);
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void setInt8(uint32_t offset, int8_t value);
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void setInt16(uint32_t offset, int16_t value);
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void setInt32(uint32_t offset, int32_t value);
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void setFloat32(uint32_t offset, float value);
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inline const ArrayBuffer *buffer() const { return _buffer; }
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inline ArrayBuffer *buffer() { return _buffer; }
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inline uint32_t byteOffset() const { return _byteOffset; }
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inline uint32_t byteLength() const {
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return _byteEndPos - _byteOffset;
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}
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using Int32Reader = int32_t (DataView::*)(uint32_t) const;
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using UInt32Reader = uint32_t (DataView::*)(uint32_t) const;
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using Int16Reader = int16_t (DataView::*)(uint32_t) const;
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using UInt16Reader = uint16_t (DataView::*)(uint32_t) const;
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using Int8Reader = int8_t (DataView::*)(uint32_t) const;
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using UInt8Reader = uint8_t (DataView::*)(uint32_t) const;
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using ReaderVariant = ccstd::variant<ccstd::monostate, Int32Reader, UInt32Reader, Int16Reader, UInt16Reader, Int8Reader, UInt8Reader>;
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static ccstd::unordered_map<ccstd::string, ReaderVariant> intReaderMap;
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int32_t readInt(ReaderVariant &readerVariant, uint32_t offset);
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using IntWritter = void (DataView::*)(uint32_t, uint32_t);
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static ccstd::unordered_map<ccstd::string, IntWritter> intWritterMap;
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private:
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ArrayBuffer::Ptr _buffer;
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uint8_t *_data{nullptr};
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uint32_t _byteOffset{0};
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uint32_t _byteEndPos{0};
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};
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} // namespace cc
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