00001 /******************************************************************************
00002 * swcomprs.h - definition of Class SWCompress used for data compression
00003 *
00004 * $Id: swcomprs_8h-source.html,v 1.4 2002/01/22 14:20:28 jansorg Exp $
00005 *
00006 * Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)
00007 * CrossWire Bible Society
00008 * P. O. Box 2528
00009 * Tempe, AZ 85280-2528
00010 *
00011 * This program is free software; you can redistribute it and/or modify it
00012 * under the terms of the GNU General Public License as published by the
00013 * Free Software Foundation version 2.
00014 *
00015 * This program is distributed in the hope that it will be useful, but
00016 * WITHOUT ANY WARRANTY; without even the implied warranty of
00017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00018 * General Public License for more details.
00019 *
00020 */
00021
00022 #ifndef SWCOMPRS_H
00023 #define SWCOMPRS_H
00024
00025 #include <defs.h>
00026
00027 class SWDLLEXPORT SWCompress
00028 {
00029 void Init ();
00030 void cycleStream ();
00031 protected:
00032 char *buf, *zbuf, direct; // 0 - encode; 1 - decode
00033 unsigned long zlen, zpos, pos, slen;
00034 public:
00035 SWCompress ();
00036 virtual ~ SWCompress ();
00037 virtual char *Buf (const char *buf = 0, unsigned long *len = 0);
00038 virtual char *zBuf (unsigned long *len, char *buf = 0);
00039 virtual unsigned long GetChars (char *buf, unsigned long len); // override for other than buffer compression
00040 virtual unsigned long SendChars (char *buf, unsigned long len); // override for other than buffer compression
00041 virtual void Encode (void); // override to provide compression algorythm
00042 virtual void Decode (void); // override to provide compression algorythm
00043 };
00044
00045 #endif
1.2.9.1 written by Dimitri van Heesch,
© 1997-2001