110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/***
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Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuIOAdapterCompression.cpp
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Date: 2022-6-6
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include <Aurora/IO/IOExperimental.hpp>
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#include "AuIOAdapterCompression.hpp"
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namespace Aurora::IO
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{
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CompressionStreamReader::CompressionStreamReader(const AuSPtr<Compression::ICompressionStream> &pCompressionStream) :
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pCompressionStream(pCompressionStream)
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{
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}
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CompressionSeekingReader::CompressionSeekingReader(const AuSPtr<Compression::ICompressionStream> &pCompressionStream)
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: pCompressionStream(pCompressionStream)
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{
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}
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EStreamError CompressionStreamReader::IsOpen()
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{
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return this->bErrored_ ? EStreamError::eErrorEndOfStream : EStreamError::eErrorNone;
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}
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EStreamError CompressionStreamReader::Read(const Memory::MemoryViewStreamWrite ¶meters)
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{
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if (!this->pCompressionStream)
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{
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return EStreamError::eErrorStreamNotOpen;
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}
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auto pair = this->pCompressionStream->ReadEx(parameters, true);
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if (pair == AuStreamReadWrittenPair_t{})
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{
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this->bErrored_ = true;
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return EStreamError::eErrorEndOfStream;
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}
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parameters.outVariable = pair.second;
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return EStreamError::eErrorNone;
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}
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void CompressionStreamReader::Close()
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{
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}
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EStreamError CompressionSeekingReader::IsOpen()
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{
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return this->bErrored_ ?
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EStreamError::eErrorEndOfStream :
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EStreamError::eErrorNone;
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}
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EStreamError CompressionSeekingReader::ArbitraryRead(AuUInt offset, const Memory::MemoryViewStreamWrite ¶meters)
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{
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if (this->uOffset != offset)
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{
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if (this->uOffset > offset)
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{
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if (!this->pCompressionStream->GoBackByProcessedN(this->uOffset - offset))
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{
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SysPushErrorIO("Negative compression seek out of bounds");
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return EStreamError::eErrorStreamInterrupted;
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}
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}
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else
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{
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if (!this->pCompressionStream->GoForwardByProcessedN(offset - this->uOffset))
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{
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SysPushErrorIO("Positive compression seek out of bounds");
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return EStreamError::eErrorStreamInterrupted;
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}
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}
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this->uOffset = offset;
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}
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auto pair = this->pCompressionStream->ReadEx(parameters, true);
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if (pair == AuStreamReadWrittenPair_t {})
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{
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this->bErrored_ = true;
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return EStreamError::eErrorEndOfStream;
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}
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this->uOffset += pair.second;
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parameters.outVariable = pair.second;
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return EStreamError::eErrorNone;
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}
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void CompressionSeekingReader::Close()
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{
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}
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AUKN_SYM AuSPtr<IStreamReader> NewCompressionReadAdapter(const AuSPtr<Compression::ICompressionStream> &pCompresionStream)
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{
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return AuMakeShared<CompressionStreamReader>(pCompresionStream);
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}
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AUKN_SYM AuSPtr<ISeekingReader> NewCompressionSeekingAdapter(const AuSPtr<Compression::ICompressionStream> &pCompresionStream)
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{
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return AuMakeShared<CompressionSeekingReader>(pCompresionStream);
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}
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} |