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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.
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
// Copyright 2008 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 <cstdio>
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#include <memory>
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#include <string>
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#include "Common/CommonTypes.h"
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#include "Common/IOFile.h"
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#include "DiscIO/Blob.h"
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namespace DiscIO
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{
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class PlainFileReader : public BlobReader
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{
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public:
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static std::unique_ptr<PlainFileReader> Create(File::IOFile file);
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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 { return m_size; }
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u64 GetDataSize() const override { return m_size; }
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DataSizeType GetDataSizeType() const override { return DataSizeType::Accurate; }
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u64 GetBlockSize() const override { return 0; }
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bool HasFastRandomAccessInBlock() const override { return true; }
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std::string GetCompressionMethod() const override { return {}; }
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std::optional<int> GetCompressionLevel() const override { return std::nullopt; }
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bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
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private:
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PlainFileReader(File::IOFile file);
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File::IOFile m_file;
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u64 m_size;
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};
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} // namespace DiscIO
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