65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: FileSeekableReader.hpp
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Date: 2021-6-10
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Author: Reece
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***/
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#pragma once
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namespace Aurora::IO::FS
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{
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struct FileSeekableReader : ISeekingReader
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{
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AU_NO_COPY_NO_MOVE(FileSeekableReader)
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inline FileSeekableReader() {}
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inline FileSeekableReader(const AuSPtr<IFileStream> &stream) : stream_(stream) { }
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inline ~FileSeekableReader() {}
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template<typename... T>
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bool OpenFile(T... args)
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{
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this->stream_ = OpenReadShared(args...);
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return bool(this->stream_);
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}
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virtual EStreamError IsOpen() override
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{
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return this->stream_ ? EStreamError::eErrorNone : EStreamError::eErrorStreamInterrupted;
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}
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virtual EStreamError ArbitraryRead(AuUInt offset, const Memory::MemoryViewStreamWrite ¶mters) override
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{
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if (!this->stream_)
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{
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return EStreamError::eErrorStreamNotOpen;
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}
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if (!this->stream_->SetOffset(offset))
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{
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return EStreamError::eErrorEndOfStream;
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}
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if (!this->stream_->Read(paramters))
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{
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return EStreamError::eErrorStreamInterrupted;
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}
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if (paramters.outVariable == 0)
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{
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return EStreamError::eErrorEndOfStream;
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}
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return EStreamError::eErrorNone;
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}
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virtual void Close() override
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{
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stream_.reset();
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}
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private:
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AuSPtr<IFileStream> stream_{};
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};
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} |