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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <string_view>
#include "common/intrusive_list.h"
#include "core/file_sys/mode.h"
#include "core/file_sys/vfs.h"
namespace Common::FS {
class IOFile;
}
namespace FileSys {
struct FileReference : public Common::IntrusiveListBaseNode<FileReference> {
FileReference(std::shared_ptr<Common::FS::IOFile>&& f) : file(f) {}
std::shared_ptr<Common::FS::IOFile> file;
};
class RealVfsFile;
class RealVfsFilesystem : public VfsFilesystem {
public:
RealVfsFilesystem();
~RealVfsFilesystem() override;
std::string GetName() const override;
bool IsReadable() const override;
bool IsWritable() const override;
VfsEntryType GetEntryType(std::string_view path) const override;
VirtualFile OpenFile(std::string_view path, Mode perms = Mode::Read) override;
VirtualFile CreateFile(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualFile CopyFile(std::string_view old_path, std::string_view new_path) override;
VirtualFile MoveFile(std::string_view old_path, std::string_view new_path) override;
bool DeleteFile(std::string_view path) override;
VirtualDir OpenDirectory(std::string_view path, Mode perms = Mode::Read) override;
VirtualDir CreateDirectory(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualDir CopyDirectory(std::string_view old_path, std::string_view new_path) override;
VirtualDir MoveDirectory(std::string_view old_path, std::string_view new_path) override;
bool DeleteDirectory(std::string_view path) override;
private:
using ReferenceListType = Common::IntrusiveListBaseTraits<FileReference>::ListType;
ReferenceListType open_references;
ReferenceListType closed_references;
size_t num_open_files{};
private:
friend class RealVfsFile;
void RefreshReference(const std::string& path, Mode perms, FileReference& reference);
void DropReference(std::unique_ptr<FileReference>&& reference);
void EvictSingleReference();
private:
void InsertReferenceIntoList(FileReference& reference);
void RemoveReferenceFromList(FileReference& reference);
};
// An implementation of VfsFile that represents a file on the user's computer.
class RealVfsFile : public VfsFile {
friend class RealVfsDirectory;
friend class RealVfsFilesystem;
public:
~RealVfsFile() override;
std::string GetName() const override;
std::size_t GetSize() const override;
bool Resize(std::size_t new_size) override;
VirtualDir GetContainingDirectory() const override;
bool IsWritable() const override;
bool IsReadable() const override;
std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override;
std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override;
bool Rename(std::string_view name) override;
private:
RealVfsFile(RealVfsFilesystem& base, std::unique_ptr<FileReference> reference,
const std::string& path, Mode perms = Mode::Read);
RealVfsFilesystem& base;
std::unique_ptr<FileReference> reference;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
Mode perms;
};
// An implementation of VfsDirectory that represents a directory on the user's computer.
class RealVfsDirectory : public VfsDirectory {
friend class RealVfsFilesystem;
public:
~RealVfsDirectory() override;
VirtualFile GetFileRelative(std::string_view relative_path) const override;
VirtualDir GetDirectoryRelative(std::string_view relative_path) const override;
VirtualFile GetFile(std::string_view name) const override;
VirtualDir GetSubdirectory(std::string_view name) const override;
VirtualFile CreateFileRelative(std::string_view relative_path) override;
VirtualDir CreateDirectoryRelative(std::string_view relative_path) override;
bool DeleteSubdirectoryRecursive(std::string_view name) override;
std::vector<VirtualFile> GetFiles() const override;
FileTimeStampRaw GetFileTimeStamp(std::string_view path) const override;
std::vector<VirtualDir> GetSubdirectories() const override;
bool IsWritable() const override;
bool IsReadable() const override;
std::string GetName() const override;
VirtualDir GetParentDirectory() const override;
VirtualDir CreateSubdirectory(std::string_view name) override;
VirtualFile CreateFile(std::string_view name) override;
bool DeleteSubdirectory(std::string_view name) override;
bool DeleteFile(std::string_view name) override;
bool Rename(std::string_view name) override;
std::string GetFullPath() const override;
std::map<std::string, VfsEntryType, std::less<>> GetEntries() const override;
private:
RealVfsDirectory(RealVfsFilesystem& base, const std::string& path, Mode perms = Mode::Read);
template <typename T, typename R>
std::vector<std::shared_ptr<R>> IterateEntries() const;
RealVfsFilesystem& base;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
Mode perms;
};
} // namespace FileSys
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