66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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#pragma once
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#include "Engine/Platform/Types.h"
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#include "ReadStream.h"
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/// <summary>
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/// Implementation of the stream that has access to the file and is optimized for fast reading from it
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/// </summary>
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/// <seealso cref="ReadStream" />
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class FLAXENGINE_API FileReadStream : public ReadStream
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{
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private:
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File* _file;
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uint32 _virtualPosInBuffer; // Current position in the buffer (index)
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uint32 _bufferSize; // Amount of loaded bytes from the file to the buffer
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uint32 _filePosition; // Cached position in the file (native)
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byte _buffer[FILESTREAM_BUFFER_SIZE];
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public:
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NON_COPYABLE(FileReadStream);
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/// <summary>
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/// Init
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/// </summary>
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/// <param name="file">File to read</param>
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FileReadStream(File* file);
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/// <summary>
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/// Destructor
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/// </summary>
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~FileReadStream();
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public:
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/// <summary>
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/// Gets the file handle.
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/// </summary>
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FORCE_INLINE const File* GetFile() const
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{
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return _file;
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}
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/// <summary>
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/// Unlink file object passed via constructor
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/// </summary>
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void Unlink();
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public:
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/// <summary>
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/// Open file to write data to it
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/// </summary>
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/// <param name="path">Path to the file</param>
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/// <returns>Created file reader stream or null if cannot perform that action</returns>
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static FileReadStream* Open(const StringView& path);
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public:
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// [ReadStream]
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void Flush() final override;
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void Close() final override;
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uint32 GetLength() override;
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uint32 GetPosition() override;
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void SetPosition(uint32 seek) override;
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void ReadBytes(void* data, uint32 bytes) override;
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};
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