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# XMLBigInteger.hpp

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    00001 /*
    00002  * The Apache Software License, Version 1.1
    00003  *
    00004  * Copyright (c) 2001 The Apache Software Foundation.  All rights
    00005  * reserved.
    00006  *
    00007  * Redistribution and use in source and binary forms, with or without
    00008  * modification, are permitted provided that the following conditions
    00009  * are met:
    00010  *
    00011  * 1. Redistributions of source code must retain the above copyright
    00012  *    notice, this list of conditions and the following disclaimer.
    00013  *
    00014  * 2. Redistributions in binary form must reproduce the above copyright
    00015  *    notice, this list of conditions and the following disclaimer in
    00016  *    the documentation and/or other materials provided with the
    00017  *    distribution.
    00018  *
    00019  * 3. The end-user documentation included with the redistribution,
    00020  *    if any, must include the following acknowledgment:
    00021  *       "This product includes software developed by the
    00022  *        Apache Software Foundation (http://www.apache.org/)."
    00023  *    Alternately, this acknowledgment may appear in the software itself,
    00024  *    if and wherever such third-party acknowledgments normally appear.
    00025  *
    00026  * 4. The names "Xerces" and "Apache Software Foundation" must
    00027  *    not be used to endorse or promote products derived from this
    00028  *    software without prior written permission. For written
    00029  *    permission, please contact apache\@apache.org.
    00030  *
    00031  * 5. Products derived from this software may not be called "Apache",
    00032  *    nor may "Apache" appear in their name, without prior written
    00033  *    permission of the Apache Software Foundation.
    00034  *
    00035  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
    00036  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    00037  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    00038  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
    00039  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    00040  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    00041  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
    00042  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    00043  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    00044  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
    00045  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    00046  * SUCH DAMAGE.
    00047  * ====================================================================
    00048  *
    00049  * This software consists of voluntary contributions made by many
    00050  * individuals on behalf of the Apache Software Foundation, and was
    00051  * originally based on software copyright (c) 2001 International
    00052  * Business Machines, Inc., http://www.ibm.com .  For more information
    00053  * on the Apache Software Foundation, please see
    00054  * <http://www.apache.org/>.
    00055  */
    00056
    00057 /*
    00058  * $Id: XMLBigInteger.hpp,v 1.3 2002/08/13 22:11:23 peiyongz Exp $
    00059  */
    00060
    00061 #ifndef XML_BIGINTEGER_HPP
    00062 #define XML_BIGINTEGER_HPP
    00063
    00064 #include <xercesc/util/XercesDefs.hpp>
    00065 #include <xercesc/util/XMLString.hpp>
    00066
    00067 class  XMLBigInteger
    00068 {
    00069 public:
    00070
    00081
    00082     XMLBigInteger(const XMLCh* const strValue);
    00083
    00084     ~XMLBigInteger();
    00085
    00086     XMLBigInteger(const XMLBigInteger& toCopy);
    00087
    00088     static void parseBigInteger(const XMLCh* const toConvert
    00089                               , XMLCh* const       retBuffer
    00090                               , int&   signValue);
    00091
    00092     static int  compareValues(const XMLBigInteger* const lValue
    00093                              ,const XMLBigInteger* const rValue);
    00094
    00095
    00096     void        multiply(const unsigned int byteToShift);
    00097
    00098     void        divide(const unsigned int byteToShift);
    00099
    00100     int         getTotalDigit() const;
    00101
    00107     inline XMLCh*      toString() const;
    00108
    00119     bool operator==(const XMLBigInteger& toCompare) const;
    00120
    00125     int getSign() const;
    00126
    00127     int intValue() const;
    00128
    00129 private:
    00130
    00131     void setSign(int);
    00132
    00133     /*
    00134      * The number is internally stored in "minimal" sign-fMagnitude format
    00135      * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
    00136      * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
    00137      * Thus, there is exactly one representation for each value.
    00138      */
    00139     // -----------------------------------------------------------------------
    00140     //  Private data members
    00141     //
    00142     //  fSign
    00143     //     to represent the sign of the number.
    00144     //
    00145     //  fMagnitude
    00146     //     the buffer holding the number.
    00147     //
    00148     //  fRawData
    00149     //     to preserve the original string used to construct this object,
    00150     //     needed for pattern matching.
    00151     //
    00152     // -----------------------------------------------------------------------
    00153
    00154     int         fSign;
    00155     XMLCh*      fMagnitude;  //null terminated
    00156     XMLCh*      fRawData;
    00157
    00158 };
    00159
    00160 inline int XMLBigInteger::getSign() const
    00161 {
    00162     return fSign;
    00163 }
    00164
    00165 inline int XMLBigInteger::getTotalDigit() const
    00166 {
    00167     return ((getSign() ==0) ? 0 : XMLString::stringLen(fMagnitude));
    00168 }
    00169
    00170 inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
    00171 {
    00172     return ( compareValues(this, &toCompare) ==0 ? true : false);
    00173 }
    00174
    00175 inline void XMLBigInteger::setSign(int newSign)
    00176 {
    00177     fSign = newSign;
    00178 }
    00179
    00180 //
    00181 // The caller needs to de-allocate the memory allocated by this function
    00182 //
    00183 inline XMLCh*  XMLBigInteger::toString() const
    00184 {
    00185     return XMLString::replicate(fRawData);
    00186 }
    00187
    00188 #endif

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