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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include <memory>
#include <string>
#include <vector>
#include "common/common_types.h"
#include "common/file_util.h"
#include "core/file_sys/archive_backend.h"
#include "core/file_sys/directory_backend.h"
#include "core/file_sys/file_backend.h"
#include "core/hle/result.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// FileSys namespace
namespace FileSys {
/**
* Helper which implements a backend accessing the host machine's filesystem.
* This should be subclassed by concrete archive types, which will provide the
* base directory on the host filesystem and override any required functionality.
*/
class DiskArchive : public ArchiveBackend {
public:
DiskArchive(const std::string& mount_point_) : mount_point(mount_point_) {}
virtual std::string GetName() const override { return "DiskArchive: " + mount_point; }
ResultVal<std::unique_ptr<FileBackend>> OpenFile(const Path& path, const Mode mode) const override;
ResultCode DeleteFile(const Path& path) const override;
bool RenameFile(const Path& src_path, const Path& dest_path) const override;
bool DeleteDirectory(const Path& path) const override;
ResultCode CreateFile(const Path& path, u64 size) const override;
bool CreateDirectory(const Path& path) const override;
bool RenameDirectory(const Path& src_path, const Path& dest_path) const override;
std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
u64 GetFreeBytes() const override;
protected:
friend class DiskFile;
friend class DiskDirectory;
std::string mount_point;
};
class DiskFile : public FileBackend {
public:
DiskFile(const DiskArchive& archive, const Path& path, const Mode mode);
ResultCode Open() override;
ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
u64 GetSize() const override;
bool SetSize(u64 size) const override;
bool Close() const override;
void Flush() const override {
file->Flush();
}
protected:
std::string path;
Mode mode;
std::unique_ptr<FileUtil::IOFile> file;
};
class DiskDirectory : public DirectoryBackend {
public:
DiskDirectory(const DiskArchive& archive, const Path& path);
~DiskDirectory() override {
Close();
}
bool Open() override;
u32 Read(const u32 count, Entry* entries) override;
bool Close() const override {
return true;
}
protected:
std::string path;
u32 total_entries_in_directory;
FileUtil::FSTEntry directory;
// We need to remember the last entry we returned, so a subsequent call to Read will continue
// from the next one. This iterator will always point to the next unread entry.
std::vector<FileUtil::FSTEntry>::iterator children_iterator;
};
} // namespace FileSys
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