115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
/***
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Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: DeflateDecompressor.hpp
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Date: 2022-2-15
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Author: Reece
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***/
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#pragma once
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#include "zlib.h"
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namespace Aurora::Compression
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{
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struct ZIPInflate : public BaseStream
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{
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DecompressInfo meta;
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ZIPInflate(const DecompressInfo &meta, bool hasBits, AuInt8 bits) : meta(meta), BaseStream(meta.internalStreamSize), bits_(bits), hasBits_(hasBits)
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{}
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~ZIPInflate()
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{
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if (this->init_)
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{
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inflateEnd(&this->ctx_);
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}
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}
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bool Init(const AuSPtr<IO::IStreamReader> &reader)
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{
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int ret;
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this->reader_ = reader;
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if (this->hasBits_)
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{
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ret = inflateInit2(&this->ctx_, this->bits_);
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}
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else
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{
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ret = inflateInit(&this->ctx_);
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}
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if (ret < Z_OK)
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{
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SysPushErrorMem("Error: {}", zError(ret));
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return false;
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}
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this->init_ = true;
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if (!this->_outbuffer)
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{
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SysPushErrorMem();
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return false;
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}
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this->SetArray(this->din_);
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return true;
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}
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AuStreamReadWrittenPair_t Ingest_s(AuUInt32 input) override
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{
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AuUInt32 done {}, read {};
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while (read < input)
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{
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read += IngestForInPointer<Bytef, uInt>(this->reader_, this->ctx_.next_in, this->ctx_.avail_in, input - read);
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if (!this->ctx_.avail_in)
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{
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return {read, done};
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}
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do
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{
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this->ctx_.avail_out = AuArraySize(this->dout_);
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this->ctx_.next_out = this->dout_;
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if (!this->ctx_.avail_out)
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{
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break;
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}
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auto ret = inflate(&this->ctx_, Z_NO_FLUSH);
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if (ret < Z_OK)
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{
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SysPushErrorIO("Error: {}", zError(ret));
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return AuMakePair(read, 0);
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}
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auto have = AuArraySize(this->dout_) - this->ctx_.avail_out;
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done += have;
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if (!Write(reinterpret_cast<const AuUInt8 *>(this->dout_),
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have))
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{
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return {};
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}
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}
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while (this->ctx_.avail_out == 0);
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}
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return {read, done};
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}
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private:
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AuSPtr<IO::IStreamReader> reader_;
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z_stream ctx_ {};
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bool init_ {};
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bool hasBits_;
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AuInt8 bits_;
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unsigned char din_[kChunkSize];
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unsigned char dout_[kChunkSize];
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};
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} |