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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
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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 1.8 2003/05/16 06:01:53 knoaman 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
    00084     XMLBigInteger
    00085     (
    00086         const XMLCh* const strValue
    00087         , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
    00088     );
    00089     ~XMLBigInteger();
    00090
    00091     XMLBigInteger(const XMLBigInteger& toCopy);
    00092
    00093     static void parseBigInteger(const XMLCh* const toConvert
    00094                               , XMLCh* const       retBuffer
    00095                               , int&   signValue);
    00096
    00097     static int  compareValues(const XMLBigInteger* const lValue
    00098                              ,const XMLBigInteger* const rValue);
    00099
    00100
    00101     void        multiply(const unsigned int byteToShift);
    00102
    00103     void        divide(const unsigned int byteToShift);
    00104
    00105     int         getTotalDigit() const;
    00106
    00115     inline XMLCh*      toString() const;
    00116
    00122     inline XMLCh*      getRawData() const;
    00123
    00134     bool operator==(const XMLBigInteger& toCompare) const;
    00135
    00140     int getSign() const;
    00141
    00142     int intValue() const;
    00143
    00144 private:
    00145
    00146     void setSign(int);
    00147
    00148     /*
    00149      * The number is internally stored in "minimal" sign-fMagnitude format
    00150      * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
    00151      * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
    00152      * Thus, there is exactly one representation for each value.
    00153      */
    00154     // -----------------------------------------------------------------------
    00155     //  Private data members
    00156     //
    00157     //  fSign
    00158     //     to represent the sign of the number.
    00159     //
    00160     //  fMagnitude
    00161     //     the buffer holding the number.
    00162     //
    00163     //  fRawData
    00164     //     to preserve the original string used to construct this object,
    00165     //     needed for pattern matching.
    00166     //
    00167     // -----------------------------------------------------------------------
    00168
    00169     int         fSign;
    00170     XMLCh*      fMagnitude;  //null terminated
    00171     XMLCh*      fRawData;
    00172     MemoryManager* fMemoryManager;
    00173 };
    00174
    00175 inline int XMLBigInteger::getSign() const
    00176 {
    00177     return fSign;
    00178 }
    00179
    00180 inline int XMLBigInteger::getTotalDigit() const
    00181 {
    00182     return ((getSign() ==0) ? 0 : XMLString::stringLen(fMagnitude));
    00183 }
    00184
    00185 inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
    00186 {
    00187     return ( compareValues(this, &toCompare) ==0 ? true : false);
    00188 }
    00189
    00190 inline void XMLBigInteger::setSign(int newSign)
    00191 {
    00192     fSign = newSign;
    00193 }
    00194
    00195 inline XMLCh*  XMLBigInteger::getRawData() const
    00196 {
    00197     return fRawData;
    00198 }
    00199
    00200 //
    00201 // The caller needs to de-allocate the memory allocated by this function
    00202 //
    00203 inline XMLCh*  XMLBigInteger::toString() const
    00204 {
    00205     // Return data using global operator new
    00206     return XMLString::replicate(fRawData);
    00207 }
    00208
    00209 XERCES_CPP_NAMESPACE_END
    00210
    00211 #endif

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