81 lines
1.9 KiB
C++
81 lines
1.9 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 <algorithm>
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#include <memory>
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#include <string_view>
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#include "core/file_sys/vfs.h"
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namespace FileSys {
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class StaticVfsFile : public VfsFile {
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public:
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explicit StaticVfsFile(u8 value_, std::size_t size_ = 0, std::string name_ = "",
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VirtualDir parent_ = nullptr)
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: value{value_}, size{size_}, 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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size = new_size;
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return true;
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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::fill(data, data + read, value);
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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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std::optional<u8> ReadByte(std::size_t offset) const override {
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if (offset >= size) {
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return std::nullopt;
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}
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return value;
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}
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std::vector<u8> ReadBytes(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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return std::vector<u8>(read, value);
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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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u8 value;
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std::size_t size;
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std::string name;
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VirtualDir parent;
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};
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} // namespace FileSys
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