AuroraRuntime/Include/Aurora/IO/FS/FileArbitraryReader.hpp

49 lines
1.4 KiB
C++

/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: FileArbitraryReader.hpp
Date: 2021-6-10
Author: Reece
***/
#pragma once
namespace Aurora::IO::FS
{
class FileArbitraryReader : public IArbitraryStreamer
{
public:
AU_NO_COPY_NO_MOVE(FileArbitraryReader)
FileArbitraryReader() {}
~FileArbitraryReader() {}
template<typename... T>
bool OpenFile(T... args)
{
stream_ = OpenReadUnique(args...);
return stream_ != nullptr;
}
virtual EStreamError Open() override
{
return stream_ ? EStreamError::eErrorNone : EStreamError::eErrorStreamInterrupted;
}
virtual EStreamError ArbitraryRead(AuUInt32 offset, const Memory::MemoryViewStreamWrite &paramters) override
{
if (!stream_) return EStreamError::eErrorStreamNotOpen;
if (!stream_->SetOffset(offset)) return EStreamError::eErrorEndOfStream;
if (!stream_->Read(paramters)) return EStreamError::eErrorStreamInterrupted;
if (paramters.outVariable== 0) return EStreamError::eErrorEndOfStream;
return EStreamError::eErrorNone;
}
virtual void Close() override
{
stream_.reset();
}
private:
OpenReadUnique_t stream_{};
};
}