yuzu/src/core/file_sys/vfs_real.h

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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <string_view>
#include <boost/container/flat_map.hpp>
#include "core/file_sys/mode.h"
#include "core/file_sys/vfs.h"
namespace FileUtil {
class IOFile;
}
namespace FileSys {
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:
boost::container::flat_map<std::string, std::weak_ptr<FileUtil::IOFile>> cache;
};
// An implmentation 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;
std::shared_ptr<VfsDirectory> 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::shared_ptr<FileUtil::IOFile> backing,
const std::string& path, Mode perms = Mode::Read);
bool Close();
RealVfsFilesystem& base;
std::shared_ptr<FileUtil::IOFile> backing;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
std::vector<std::string> parent_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;
std::shared_ptr<VfsFile> GetFileRelative(std::string_view path) const override;
std::shared_ptr<VfsDirectory> GetDirectoryRelative(std::string_view path) const override;
std::shared_ptr<VfsFile> GetFile(std::string_view name) const override;
std::shared_ptr<VfsDirectory> GetSubdirectory(std::string_view name) const override;
std::shared_ptr<VfsFile> CreateFileRelative(std::string_view path) override;
std::shared_ptr<VfsDirectory> CreateDirectoryRelative(std::string_view path) override;
bool DeleteSubdirectoryRecursive(std::string_view name) override;
std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
bool IsWritable() const override;
bool IsReadable() const override;
std::string GetName() const override;
std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
std::shared_ptr<VfsDirectory> CreateSubdirectory(std::string_view name) override;
std::shared_ptr<VfsFile> 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;
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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;
std::vector<std::string> parent_components;
Mode perms;
};
} // namespace FileSys