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vfs_static: Add StaticVfsFile

Always returns the template argument byte for all reads. Doesn't support writes.
This commit is contained in:
Zach Hilman 2018-09-19 21:57:39 -04:00
parent f68e324672
commit c65d4d119f
2 changed files with 78 additions and 0 deletions

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@ -63,6 +63,7 @@ add_library(core STATIC
file_sys/vfs_offset.h
file_sys/vfs_real.cpp
file_sys/vfs_real.h
file_sys/vfs_static.h
file_sys/vfs_vector.cpp
file_sys/vfs_vector.h
file_sys/xts_archive.cpp

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@ -0,0 +1,77 @@
// 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 {
template <u8 value>
class StaticVfsFile : public VfsFile {
public:
explicit StaticVfsFile(size_t size = 0, std::string name = "", VirtualDir parent = nullptr)
: size(size), name(name), parent(parent) {}
std::string GetName() const override {
return name;
}
size_t GetSize() const override {
return size;
}
bool Resize(size_t new_size) override {
size = new_size;
return true;
}
std::shared_ptr<VfsDirectory> GetContainingDirectory() const override {
return parent;
}
bool IsWritable() const override {
return false;
}
bool IsReadable() const override {
return true;
}
size_t Read(u8* data, size_t length, size_t offset) const override {
const auto read = std::min(length, size - offset);
std::fill(data, data + read, value);
return read;
}
size_t Write(const u8* data, size_t length, size_t offset) override {
return 0;
}
boost::optional<u8> ReadByte(size_t offset) const override {
if (offset < size)
return value;
return boost::none;
}
std::vector<u8> ReadBytes(size_t length, 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:
size_t size;
std::string name;
VirtualDir parent;
};
} // namespace FileSys