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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <algorithm>
#include <memory>
#include <string_view>
#include "core/file_sys/vfs.h"
namespace FileSys {
class StaticVfsFile : public VfsFile {
public:
explicit StaticVfsFile(u8 value_, std::size_t size_ = 0, std::string name_ = "",
VirtualDir parent_ = nullptr)
: value{value_}, size{size_}, 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 {
size = new_size;
return true;
}
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::fill(data, data + read, value);
return read;
}
std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override {
return 0;
}
std::optional<u8> ReadByte(std::size_t offset) const override {
if (offset >= size) {
return std::nullopt;
}
return value;
}
std::vector<u8> ReadBytes(std::size_t length, std::size_t offset) const override {
const auto read = std::min(length, size - offset);
return std::vector<u8>(read, value);
}
bool Rename(std::string_view new_name) override {
name = new_name;
return true;
}
private:
u8 value;
std::size_t size;
std::string name;
VirtualDir parent;
};
} // namespace FileSys
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