/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 * 

 *      http://www.apache.org/licenses/LICENSE-2.0

 * 

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

/*

 * $Id: BMPattern.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#if !defined(BMPATTERN_HPP)

#define BMPATTERN_HPP

// ---------------------------------------------------------------------------

//  Includes

// ---------------------------------------------------------------------------

#include <xercesc/util/XMemory.hpp>

#include <xercesc/util/PlatformUtils.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class XMLUTIL_EXPORT BMPattern : public XMemory

{

public:

	// -----------------------------------------------------------------------

	//  Public Constructors and Destructor

    // -----------------------------------------------------------------------

	/** @name Constructors */

    //@{

	/**

      * This is the onstructor which takes the pattern information. A default

      * shift table size is used.

      *

      * @param  pattern     The pattern to match against.

      *

      * @param  ignoreCase  A flag to indicate whether to ignore case

	  *						matching or not.

      *

      * @param  manager     The configurable memory manager

      */

	BMPattern

    (

        const XMLCh* const pattern

        , bool ignoreCase

        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager

    );

	/**

      * This is the constructor which takes all of the information

      * required to construct a BM pattern object.

      *

      * @param  pattern     The pattern to match against.

      *

	  * @param	tableSize	Indicates the size of the shift table.

	  *

      * @param  ignoreCase  A flag to indicate whether to ignore case

	  *						matching or not.

      *

      * @param  manager     The configurable memory manager

      */

	BMPattern

    (

        const XMLCh* const pattern

        , int tableSize

        , bool ignoreCase

        , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager

    );

	//@}

	/** @name Destructor. */

    //@{

	/**

	  * Destructor of BMPattern

	  */

	~BMPattern();

	//@}

	// -----------------------------------------------------------------------

	// Matching functions

	// -----------------------------------------------------------------------

	/** @name Matching Functions */

	//@{

	/**

	  *	This method will perform a match of the given content against a

	  *	predefined pattern.

	  */

	int matches(const XMLCh* const content, int start, int limit);

	//@}

private :

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    BMPattern();

    BMPattern(const BMPattern&);

    BMPattern& operator=(const BMPattern&);

		// -----------------------------------------------------------------------

	// This method will perform a case insensitive match

	// -----------------------------------------------------------------------

	bool matchesIgnoreCase(const XMLCh ch1, const XMLCh ch2);

	// -----------------------------------------------------------------------

	// Initialize/Clean up methods

	// -----------------------------------------------------------------------

	void initialize();

	void cleanUp();

	// -----------------------------------------------------------------------

    //  Private data members

    //

    //  fPattern

	//	fUppercasePattern

    //      This is the pattern to match against, and its upper case form.

	//		

    //  fIgnoreCase

    //      This is an indicator whether cases should be ignored during

	//		matching.

    //

    //  fShiftTable

	//	fShiftTableLen

    //      This is a table of offsets for shifting purposes used by the BM

	//		search algorithm, and its length.

    // -----------------------------------------------------------------------

	bool           fIgnoreCase;

	unsigned int   fShiftTableLen;

	int*           fShiftTable;

	XMLCh*         fPattern;

	XMLCh*         fUppercasePattern;

    MemoryManager* fMemoryManager; 

};

XERCES_CPP_NAMESPACE_END

#endif

/*

 * End of file BMPattern.hpp

 */