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335cf4f2db
A deep-copy method CopyReader has been added to BlobReader (virtual) and all of its subclasses (override). This should create a second BlobReader to open the same set of data but with an independent read pointer so that it doesn't interfere with any reads done on the original Reader. As part of this, IOFile has added code to create a deep copy IOFile pointer onto the same file, with code based on the platform in question to find the file ID from the file pointer and open a new one. There has also been a small piece added to FileInfo to enable a deep copy, but its only subclass at this time already had a copy constructor so this was relatively minor.
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
// Copyright 2017 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <memory>
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#include <string_view>
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#include "Common/CommonTypes.h"
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#include "DiscIO/Blob.h"
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namespace DiscIO
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{
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class FileInfo;
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struct Partition;
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class Volume;
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class VolumeFileBlobReader final : public BlobReader
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{
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public:
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static std::unique_ptr<VolumeFileBlobReader>
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Create(const Volume& volume, const Partition& partition, std::string_view file_path);
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BlobType GetBlobType() const override { return BlobType::PLAIN; }
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std::unique_ptr<BlobReader> CopyReader() const override;
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u64 GetRawSize() const override;
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u64 GetDataSize() const override;
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DataSizeType GetDataSizeType() const override { return DataSizeType::Accurate; }
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u64 GetBlockSize() const override;
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bool HasFastRandomAccessInBlock() const override;
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std::string GetCompressionMethod() const override;
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std::optional<int> GetCompressionLevel() const override;
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bool Read(u64 offset, u64 length, u8* out_ptr) override;
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private:
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VolumeFileBlobReader(const Volume& volume, const Partition& partition,
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std::unique_ptr<FileInfo> file_info);
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const Volume& m_volume;
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const Partition& m_partition;
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std::unique_ptr<FileInfo> m_file_info;
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};
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} // namespace DiscIO
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