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/******************************************************************************
* swcomprs.h - definition of Class SWCompress used for data compression
*
* $Id: swcomprs.h,v 1.8 2002/10/01 19:52:40 dglassey Exp $
*
* Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
*
* This program 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 version 2.
*
* This program 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.
*
*/
#ifndef SWCOMPRS_H
#define SWCOMPRS_H
#include <defs.h>
SWORD_NAMESPACE_START
class SWDLLEXPORT SWCompress
{
void Init ();
void cycleStream ();
protected:
char *buf, *zbuf, direct; // 0 - encode; 1 - decode
unsigned long zlen, zpos, pos, slen;
public:
SWCompress ();
virtual ~ SWCompress ();
virtual char *Buf (const char *buf = 0, unsigned long *len = 0);
virtual char *zBuf (unsigned long *len, char *buf = 0);
virtual unsigned long GetChars (char *buf, unsigned long len); // override for other than buffer compression
virtual unsigned long SendChars (char *buf, unsigned long len); // override for other than buffer compression
virtual void Encode (void); // override to provide compression algorythm
virtual void Decode (void); // override to provide compression algorythm
};
SWORD_NAMESPACE_END
#endif
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