/******************************************************************************
 *  swcomprs.h   - definition of Class SWCompress used for data compression
 *
 * $Id: swcomprs.h,v 1.3 2000/01/19 19:07:33 scribe 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


class SWCompress {
	void Init();
	void cycleStream();
protected:
	char *buf, *zbuf, direct;	// 0 - encode; 1 - decode
	unsigned long zlen, zpos, pos;
public:
	SWCompress();
	virtual ~SWCompress();
	virtual char *Buf(char *buf = 0);
	virtual char *zBuf(unsigned long *len, char *buf = 0);
	virtual int GetChars(char *buf, int len);	// override for other than buffer compression
	virtual int SendChars(char *buf, int 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
};

#endif