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