suyu/src/core/file_sys/vfs_offset.h
Lioncash cf0a7cd1c1 vfs: Make type hierarchy objects classes instead of structs
struct should be used when the data type is very simple or otherwise has
no invariants associated with it. Given these are used to form a
hierarchy, class should be used instead.
2018-08-12 16:55:40 -04:00

51 lines
1.7 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <string_view>
#include "core/file_sys/vfs.h"
namespace FileSys {
// An implementation of VfsFile that wraps around another VfsFile at a certain offset.
// Similar to seeking to an offset.
// If the file is writable, operations that would write past the end of the offset file will expand
// the size of this wrapper.
class OffsetVfsFile : public VfsFile {
public:
OffsetVfsFile(std::shared_ptr<VfsFile> file, size_t size, size_t offset = 0,
std::string new_name = "", VirtualDir new_parent = nullptr);
std::string GetName() const override;
size_t GetSize() const override;
bool Resize(size_t new_size) override;
std::shared_ptr<VfsDirectory> GetContainingDirectory() const override;
bool IsWritable() const override;
bool IsReadable() const override;
size_t Read(u8* data, size_t length, size_t offset) const override;
size_t Write(const u8* data, size_t length, size_t offset) override;
boost::optional<u8> ReadByte(size_t offset) const override;
std::vector<u8> ReadBytes(size_t size, size_t offset) const override;
std::vector<u8> ReadAllBytes() const override;
bool WriteByte(u8 data, size_t offset) override;
size_t WriteBytes(const std::vector<u8>& data, size_t offset) override;
bool Rename(std::string_view name) override;
size_t GetOffset() const;
private:
size_t TrimToFit(size_t r_size, size_t r_offset) const;
std::shared_ptr<VfsFile> file;
size_t offset;
size_t size;
std::string name;
VirtualDir parent;
};
} // namespace FileSys