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/*
This file is part of Warzone 2100.
Copyright (C) 2025 Warzone 2100 Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include "compression_adapter.h"
#if !defined(ZLIB_CONST)
# define ZLIB_CONST
#endif
#include <zlib.h>
/// <summary>
/// Implementation of `ICompressionAdapter` interface, which uses the
/// Zlib library to compress/decompress the data.
/// </summary>
class ZlibCompressionAdapter : public ICompressionAdapter
{
public:
explicit ZlibCompressionAdapter();
virtual ~ZlibCompressionAdapter() override;
virtual net::result<void> initialize() override;
virtual net::result<void> compress(const void* src, size_t size) override;
virtual net::result<void> flushCompressionStream() override;
virtual std::vector<uint8_t>& compressionOutBuffer() override
{
return deflateOutBuf_;
}
virtual const std::vector<uint8_t>& compressionOutBuffer() const override
{
return deflateOutBuf_;
}
virtual net::result<void> decompress(void* dst, size_t size) override;
virtual std::vector<uint8_t>& decompressionInBuffer() override
{
return inflateInBuf_;
}
virtual const std::vector<uint8_t>& decompressionInBuffer() const override
{
return inflateInBuf_;
}
virtual size_t availableSpaceToDecompress() const override;
virtual bool decompressionStreamConsumedAllInput() const override;
virtual bool decompressionNeedInput() const override
{
return inflateNeedInput_;
}
virtual void setDecompressionNeedInput(bool needInput) override
{
inflateNeedInput_ = needInput;
}
virtual void resetDecompressionStreamInputSize(size_t size) override;
private:
void resetCompressionStreamInput(const void* src, size_t size);
void resetDecompressionStreamOutput(void* dst, size_t size);
std::vector<uint8_t> deflateOutBuf_;
std::vector<uint8_t> inflateInBuf_;
z_stream deflateStream_;
z_stream inflateStream_;
bool inflateNeedInput_ = false;
};
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