102 lines
3.9 KiB
C++
102 lines
3.9 KiB
C++
//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: /CounterStrike/LZOPIPE.H 1 3/03/97 10:25a Joe_bostic $ */
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/***********************************************************************************************
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*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* File Name : LZOPIPE.H *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : 06/30/96 *
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* *
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* Last Update : June 30, 1996 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#ifndef LZOPIPE_H
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#define LZOPIPE_H
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#include "pipe.h"
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/*
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** Performs LZO compression/decompression on the data stream that is piped through this
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** class. The data is compressed in blocks so of small enough size to be compressed
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** quickly and large enough size to get decent compression rates.
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*/
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class LZOPipe : public Pipe
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{
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public:
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typedef enum CompControl {
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COMPRESS,
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DECOMPRESS
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} CompControl;
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LZOPipe(CompControl, int blocksize=1024*8);
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virtual ~LZOPipe(void);
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virtual int Flush(void);
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virtual int Put(void const * source, int slen);
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private:
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/*
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** This tells the pipe if it should be decompressing or compressing the data stream.
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*/
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CompControl Control;
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/*
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** The number of bytes accumulated into the staging buffer.
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*/
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int Counter;
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/*
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** Pointer to the working buffer that compression/decompression will use.
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*/
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char * Buffer;
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char * Buffer2;
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/*
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** The working block size. Data will be compressed in chunks of this size.
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*/
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int BlockSize;
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/*
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** Probably dont need this anymore as LZO decompresses into a staging buffer.
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*/
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int SafetyMargin;
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/*
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** Each block has a header of this format.
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*/
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struct {
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unsigned short CompCount; // Size of data block (compressed).
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unsigned short UncompCount; // Bytes of uncompressed data it represents.
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} BlockHeader;
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LZOPipe(LZOPipe & rvalue);
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LZOPipe & operator = (LZOPipe const & pipe);
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};
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#endif
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