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diff --git a/include/swbasicfilter.h b/include/swbasicfilter.h
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+/******************************************************************************
+ *  swbasicfilter.h	- definition of class SWBasicFilter.  An SWFilter
+ *  				impl that provides some basic methods that
+ *  				many filter will need and can use as a starting
+ *  				point. 
+ *
+ * $Id: swbasicfilter.h,v 1.7 2002/03/04 01:56:44 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 SWBASICFILTER_H
+#define SWBASICFILTER_H
+
+#include <swfilter.h>
+
+#include <defs.h>
+#include <map>
+using namespace std;
+
+
+class SWDLLEXPORT SWBasicFilter : public SWFilter {
+
+	char *tokenStart;
+	char *tokenEnd;
+	char *escStart;
+	char *escEnd;
+	bool escStringCaseSensitive;
+	bool tokenCaseSensitive;
+	bool passThruUnknownToken;
+	bool passThruUnknownEsc;
+
+public:
+	SWBasicFilter();
+	virtual char ProcessText(char *text, int maxlen, const SWKey *, const SWModule * = 0);
+	virtual ~SWBasicFilter();
+
+protected:
+	const SWModule *module;
+	const SWKey *key;
+	typedef map<string, string> DualStringMap;
+	DualStringMap tokenSubMap;
+	DualStringMap escSubMap;
+	void setEscapeStart(const char *escStart);
+	void setEscapeEnd(const char *escEnd);
+	void setTokenStart(const char *tokenStart);
+	void setTokenEnd(const char *tokenEnd);
+	void setPassThruUnknownToken(bool val);
+	void setPassThruUnknownEscapeString(bool val);
+	void setTokenCaseSensitive(bool val);
+	void setEscapeStringCaseSensitive(bool val);
+	void addTokenSubstitute(const char *findString, const char *replaceString);
+	void addEscapeStringSubstitute(const char *findString, const char *replaceString);
+	bool substituteToken(char **buf, const char *token);
+	bool substituteEscapeString(char **buf, const char *escString);
+	void pushString(char **buf, const char *format, ...);
+
+	virtual bool handleToken(char **buf, const char *token, DualStringMap &userData);
+	virtual bool handleEscapeString(char **buf, const char *escString, DualStringMap &userData);
+};
+
+#endif