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diff --git a/include/swcomprs.h b/include/swcomprs.h
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+++ b/include/swcomprs.h
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+/******************************************************************************
+ *  swcomprs.h   - definition of Class SWCompress used for data compression
+ *
+ * $Id: swcomprs.h,v 1.7 2001/12/20 10:01:00 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
+
+#include <defs.h>
+
+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
+};
+
+#endif