49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: BlobReader.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::Buffered
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{
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class BlobReader : public IStreamReader
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{
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public:
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AU_NO_COPY_NO_MOVE(BlobReader)
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BlobReader(const AuList<AuUInt8> &buffer) : buffer_(buffer) {}
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BlobReader() {}
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~BlobReader() {}
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virtual EStreamError Open() override
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{
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return EStreamError::eErrorNone;
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}
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virtual EStreamError Read(void *buffer, AuUInt32 &len) override
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{
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auto oldLen = std::exchange(len, 0);
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auto realEndOffset = std::min(AuUInt32(buffer_.size()) - offset_, oldLen);
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if (realEndOffset == 0) return EStreamError::eErrorEndOfStream;
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len = realEndOffset;
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std::memcpy(buffer, buffer_.data() + offset_, len);
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offset_ += realEndOffset;
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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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buffer_.clear();
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}
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private:
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AuList<AuUInt8> buffer_;
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AuUInt32 offset_ {};
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};
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} |