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https://github.com/RGBCube/serenity
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9cd0a34b5c
BlockDevice was the wrong name for this abstraction, since a block device is a type of file in a unix system, and we should use that name for that concept in the fs implementation.
32 lines
973 B
C++
32 lines
973 B
C++
#pragma once
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#include "DiskDevice.h"
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#include <AK/RetainPtr.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <stdio.h>
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class FileBackedDiskDevice final : public DiskDevice {
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public:
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static RetainPtr<FileBackedDiskDevice> create(String&& imagePath, unsigned blockSize);
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virtual ~FileBackedDiskDevice() override;
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bool isValid() const { return m_file; }
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virtual unsigned blockSize() const override;
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virtual bool readBlock(unsigned index, byte* out) const override;
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virtual bool writeBlock(unsigned index, const byte*) override;
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virtual bool read(qword offset, unsigned length, byte* out) const override;
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virtual bool write(qword offset, unsigned length, const byte* data) override;
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private:
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virtual const char* className() const override;
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FileBackedDiskDevice(String&& imagePath, unsigned blockSize);
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String m_imagePath;
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FILE* m_file { nullptr };
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qword m_fileLength { 0 };
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unsigned m_blockSize { 0 };
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};
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