106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
/*
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** Command & Conquer Red Alert(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* $Header: /CounterStrike/LCWPIPE.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 : LCWPIPE.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 LCWPIPE_H
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#define LCWPIPE_H
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#include "pipe.h"
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/*
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** Performs LCW 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 LCWPipe : 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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LCWPipe(CompControl, int blocksize=1024*8);
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virtual ~LCWPipe(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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** LCW compression requires a safety margin when decompressing over itself. This
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** margin is only for the worst case situation (very rare).
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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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LCWPipe(LCWPipe & rvalue);
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LCWPipe & operator = (LCWPipe const & pipe);
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};
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#endif
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