370d77f13a
By default, a regular copy requires an atomic increment and decrement. A move avoids this from occurring, which makes sense when the constructor is taking the shared_ptr by value.
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#include <memory>
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#include <string>
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#include "common/common_types.h"
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#include "common/file_util.h"
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#include "core/file_sys/archive_backend.h"
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#include "core/file_sys/directory_backend.h"
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#include "core/file_sys/file_backend.h"
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#include "core/hle/result.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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/**
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* Helper which implements an interface to deal with IVFC images used in some archives
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* This should be subclassed by concrete archive types, which will provide the
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* input data (load the raw IVFC archive) and override any required methods
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*/
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class IVFCArchive : public ArchiveBackend {
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public:
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IVFCArchive(std::shared_ptr<FileUtil::IOFile> file, u64 offset, u64 size);
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std::string GetName() const override;
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ResultVal<std::unique_ptr<FileBackend>> OpenFile(const Path& path,
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const Mode& mode) const override;
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ResultCode DeleteFile(const Path& path) const override;
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ResultCode RenameFile(const Path& src_path, const Path& dest_path) const override;
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ResultCode DeleteDirectory(const Path& path) const override;
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ResultCode DeleteDirectoryRecursively(const Path& path) const override;
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ResultCode CreateFile(const Path& path, u64 size) const override;
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ResultCode CreateDirectory(const Path& path) const override;
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ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const override;
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ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(const Path& path) const override;
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u64 GetFreeBytes() const override;
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protected:
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std::shared_ptr<FileUtil::IOFile> romfs_file;
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u64 data_offset;
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u64 data_size;
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};
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class IVFCFile : public FileBackend {
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public:
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IVFCFile(std::shared_ptr<FileUtil::IOFile> file, u64 offset, u64 size);
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ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
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ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) override;
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u64 GetSize() const override;
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bool SetSize(u64 size) const override;
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bool Close() const override {
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return false;
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}
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void Flush() const override {}
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private:
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std::shared_ptr<FileUtil::IOFile> romfs_file;
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u64 data_offset;
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u64 data_size;
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};
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class IVFCDirectory : public DirectoryBackend {
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public:
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u32 Read(const u32 count, Entry* entries) override {
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return 0;
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}
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bool Close() const override {
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return false;
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}
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};
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} // namespace FileSys
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