/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache\@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Id: XMLBigDecimal.hpp,v 1.3 2002/08/13 22:11:23 peiyongz Exp $
 */

#ifndef XML_BIGDECIMAL_HPP
#define XML_BIGDECIMAL_HPP

#include <xercesc/util/XercesDefs.hpp>
#include <xercesc/util/XMLNumber.hpp>
#include <xercesc/util/XMLBigInteger.hpp>

class XMLUTIL_EXPORT XMLBigDecimal : public XMLNumber
{
public:

	/**
	 * Constructs a newly allocated <code>XMLBigDecimal</code> object that
	 * represents the value represented by the string.
	 *
	 * @param      strValue the <code>String</code> to be converted to an
	 *                      <code>XMLBigDecimal</code>.
	 * @exception  NumberFormatException  if the <code>String</code> does not
	 *               contain a parsable XMLBigDecimal.
	 */

    XMLBigDecimal(const XMLCh* const strValue);

    ~XMLBigDecimal();

    XMLBigDecimal(const XMLBigDecimal& toCopy);

	/**
	 * Constructs a newly allocated <code>XMLBigDecimal</code> object
	 * from an existing XMLBigDecimal with an extra Exponent.
	 */
    XMLBigDecimal(const XMLBigDecimal& toCopy, const int addExponent);

    static void           parseBigDecimal(const XMLCh* const strValue
                                        , XMLCh* const       retValue
                                        , unsigned int&      scaleValue);

    static int            compareValues(const XMLBigDecimal* const lValue
                                      , const XMLBigDecimal* const rValue);

    static void           matchScale(XMLBigDecimal* const lValue
                                   , XMLBigDecimal* const rValue);


    virtual XMLCh*        toString() const;

    virtual int           getSign() const;

    XMLBigInteger*        getValue() const;

    unsigned int          getScale() const;

    unsigned int          getTotalDigit() const;



	/**
	 * Compares this object to the specified object.
	 * The result is <code>true</code> if and only if the argument is not
	 * <code>null</code> and is an <code>XMLBigDecimal</code> object that contains
	 * the same <code>int</code> value as this object.
	 *
	 * @param   toCompare   the object to compare with.
	 * @return  <code>true</code> if the objects are the same;
	 *          <code>false</code> otherwise.
	 */
	bool operator==(const XMLBigDecimal& toCompare) const;

private:

    void         reScale(unsigned int newValue);

    // -----------------------------------------------------------------------
    //  Private data members
    //
    //  fIntVal
    //     the XMLBigInteger holding the value of this BigDecimal.
    //
	//  fScale
    //     the number of digits to the right of the decimal point
    //
	//  fRawData
	//     to preserve the original string used to construct this object, 
	//     needed for pattern matching.
	//
    // -----------------------------------------------------------------------

	XMLBigInteger*   fIntVal;
	unsigned int     fScale;
    XMLCh*           fRawData;
};

inline XMLBigDecimal::~XMLBigDecimal()
{
    delete fIntVal;
	if (fRawData)
		delete [] fRawData;
}

inline int XMLBigDecimal::getSign() const
{
    return fIntVal->getSign();
}

inline XMLBigInteger* XMLBigDecimal::getValue() const
{
    return fIntVal;
}

inline unsigned int XMLBigDecimal::getScale() const
{
    return fScale;
}

inline unsigned int XMLBigDecimal::getTotalDigit() const
{
    return fIntVal->getTotalDigit();
}

inline bool XMLBigDecimal::operator==(const XMLBigDecimal& toCompare) const
{
    return ( XMLBigInteger::compareValues(this->fIntVal, toCompare.fIntVal) == 0 ? true : false);
}

#endif
