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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <cstring>
#include <memory>
#include <string>
#include <vector>
#include "core/file_sys/vfs.h"
namespace FileSys {
// An implementation of VfsFile that is backed by a statically-sized array
template <std::size_t size>
class ArrayVfsFile : public VfsFile {
public:
explicit ArrayVfsFile(const std::array<u8, size>& data_, std::string name_ = "",
VirtualDir parent_ = nullptr)
: data(data_), name(std::move(name_)), parent(std::move(parent_)) {}
std::string GetName() const override {
return name;
}
std::size_t GetSize() const override {
return size;
}
bool Resize(std::size_t new_size) override {
return false;
}
VirtualDir GetContainingDirectory() const override {
return parent;
}
bool IsWritable() const override {
return false;
}
bool IsReadable() const override {
return true;
}
std::size_t Read(u8* data_, std::size_t length, std::size_t offset) const override {
const auto read = std::min(length, size - offset);
std::memcpy(data_, data.data() + offset, read);
return read;
}
std::size_t Write(const u8* data_, std::size_t length, std::size_t offset) override {
return 0;
}
bool Rename(std::string_view new_name) override {
name = new_name;
return true;
}
private:
std::array<u8, size> data;
std::string name;
VirtualDir parent;
};
template <std::size_t Size, typename... Args>
std::shared_ptr<ArrayVfsFile<Size>> MakeArrayFile(const std::array<u8, Size>& data,
Args&&... args) {
return std::make_shared<ArrayVfsFile<Size>>(data, std::forward<Args>(args)...);
}
// An implementation of VfsFile that is backed by a vector optionally supplied upon construction
class VectorVfsFile : public VfsFile {
public:
explicit VectorVfsFile(std::vector<u8> initial_data = {}, std::string name_ = "",
VirtualDir parent_ = nullptr);
~VectorVfsFile() 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;
virtual void Assign(std::vector<u8> new_data);
private:
std::vector<u8> data;
VirtualDir parent;
std::string name;
};
// An implementation of VfsDirectory that maintains two vectors for subdirectories and files.
// Vector data is supplied upon construction.
class VectorVfsDirectory : public VfsDirectory {
public:
explicit VectorVfsDirectory(std::vector<VirtualFile> files = {},
std::vector<VirtualDir> dirs = {}, std::string name = "",
VirtualDir parent = nullptr);
~VectorVfsDirectory() override;
std::vector<VirtualFile> GetFiles() 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;
bool DeleteSubdirectory(std::string_view subdir_name) override;
bool DeleteFile(std::string_view file_name) override;
bool Rename(std::string_view name) override;
VirtualDir CreateSubdirectory(std::string_view subdir_name) override;
VirtualFile CreateFile(std::string_view file_name) override;
virtual void AddFile(VirtualFile file);
virtual void AddDirectory(VirtualDir dir);
private:
std::vector<VirtualFile> files;
std::vector<VirtualDir> dirs;
VirtualDir parent;
std::string name;
};
} // namespace FileSys
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