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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,
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    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 1.9 2003/12/01 23:23:27 neilg Exp $
    00059  */
    00060
    00061 #ifndef XML_BIGINTEGER_HPP
    00062 #define XML_BIGINTEGER_HPP
    00063
    00064 #include <xercesc/util/XMemory.hpp>
    00065 #include <xercesc/util/XMLString.hpp>
    00066
    00067 XERCES_CPP_NAMESPACE_BEGIN
    00068
    00069 class  XMLBigInteger : public XMemory
    00070 {
    00071 public:
    00072
    00086     XMLBigInteger
    00087     (
    00088         const XMLCh* const strValue
    00089         , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
    00090     );
    00091     ~XMLBigInteger();
    00092
    00093     XMLBigInteger(const XMLBigInteger& toCopy);
    00094
    00095     static void parseBigInteger(const XMLCh* const toConvert
    00096                               , XMLCh* const       retBuffer
    00097                               , int&   signValue);
    00098
    00099     static int  compareValues(const XMLBigInteger* const lValue
    00100                              ,const XMLBigInteger* const rValue);
    00101
    00102
    00103     void        multiply(const unsigned int byteToShift);
    00104
    00105     void        divide(const unsigned int byteToShift);
    00106
    00107     int         getTotalDigit() const;
    00108
    00117     inline XMLCh*      toString() const;
    00118
    00124     inline XMLCh*      getRawData() const;
    00125
    00136     bool operator==(const XMLBigInteger& toCompare) const;
    00137
    00142     int getSign() const;
    00143
    00144     int intValue() const;
    00145
    00146 private:
    00147
    00148     void setSign(int);
    00149
    00150     /*
    00151      * The number is internally stored in "minimal" sign-fMagnitude format
    00152      * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
    00153      * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
    00154      * Thus, there is exactly one representation for each value.
    00155      */
    00156     // -----------------------------------------------------------------------
    00157     //  Private data members
    00158     //
    00159     //  fSign
    00160     //     to represent the sign of the number.
    00161     //
    00162     //  fMagnitude
    00163     //     the buffer holding the number.
    00164     //
    00165     //  fRawData
    00166     //     to preserve the original string used to construct this object,
    00167     //     needed for pattern matching.
    00168     //
    00169     // -----------------------------------------------------------------------
    00170
    00171     int         fSign;
    00172     XMLCh*      fMagnitude;  //null terminated
    00173     XMLCh*      fRawData;
    00174     MemoryManager* fMemoryManager;
    00175 };
    00176
    00177 inline int XMLBigInteger::getSign() const
    00178 {
    00179     return fSign;
    00180 }
    00181
    00182 inline int XMLBigInteger::getTotalDigit() const
    00183 {
    00184     return ((getSign() ==0) ? 0 : XMLString::stringLen(fMagnitude));
    00185 }
    00186
    00187 inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
    00188 {
    00189     return ( compareValues(this, &toCompare) ==0 ? true : false);
    00190 }
    00191
    00192 inline void XMLBigInteger::setSign(int newSign)
    00193 {
    00194     fSign = newSign;
    00195 }
    00196
    00197 inline XMLCh*  XMLBigInteger::getRawData() const
    00198 {
    00199     return fRawData;
    00200 }
    00201
    00202 //
    00203 // The caller needs to de-allocate the memory allocated by this function
    00204 //
    00205 inline XMLCh*  XMLBigInteger::toString() const
    00206 {
    00207     // Return data using global operator new
    00208     return XMLString::replicate(fRawData);
    00209 }
    00210
    00211 XERCES_CPP_NAMESPACE_END
    00212
    00213 #endif

Copyright © 2003 The Apache Software Foundation. All Rights Reserved.