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diff --git a/indexlib/ifile.h b/indexlib/ifile.h
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+++ b/indexlib/ifile.h
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+#ifndef _IFILE_INCLUDE_GUARD_LPC_56465465798732
+#define _IFILE_INCLUDE_GUARD_LPC_56465465798732
+
+/* This file is part of indexlib.
+ * Copyright (C) 2005 Luís Pedro Coelho <luis@luispedro.org>
+ *
+ * Indexlib is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation and available as file
+ * GPL_V2 which is distributed along with indexlib.
+ * 
+ * Indexlib 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.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA
+ * 
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of this program with any edition of
+ * the Qt library by Trolltech AS, Norway (or with modified versions
+ * of Qt that use the same license as Qt), and distribute linked
+ * combinations including the two.  You must obey the GNU General
+ * Public License in all respects for all of the code used other than
+ * Qt.  If you modify this file, you may extend this exception to
+ * your version of the file, but you are not obligated to do so.  If
+ * you do not wish to do so, delete this exception statement from
+ * your version.
+ */
+
+#include "index.h"
+#include "stringarray.h"
+#include "stringset.h"
+#include "leafdatavector.h"
+#include "tokenizer.h"
+#include <vector>
+#include <set>
+#include <string>
+
+struct  ifile : public indexlib::index {
+	public:
+		ifile( std::string );
+		virtual void add( const char* str, const char* doc );
+		virtual std::auto_ptr<indexlib::result> search( const char* ) const;
+
+		virtual unsigned ndocs() const { return docnames_.size(); }
+		virtual std::string lookup_docname( unsigned idx ) const { return docnames_.get( idx ); }
+
+		virtual void remove_doc( const char* doc );
+
+		void maintenance();
+		static void remove( std::string );
+	private:
+		std::set<unsigned> find_word( std::string ) const;
+		std::vector<std::string> break_clean( const char* ) const;
+		virtual std::auto_ptr<indexlib::result> everything() const;
+
+		static bool invalid_word( std::string );
+		bool is_stop_word( std::string ) const;
+
+		void calc_stopwords();
+
+		stringarray docnames_;
+		stringset words_;
+		stringset stopwords_;
+		leafdatavector files_;
+		std::auto_ptr<indexlib::detail::tokenizer> tokenizer_;
+};
+
+#endif /* _IFILE_INCLUDE_GUARD_LPC_56465465798732 */
+