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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 1.5 2003/01/30 21:55:22 tng 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 XERCES_CPP_NAMESPACE_BEGIN
00068 
00069 class  XMLBigInteger
00070 {
00071 public:
00072 
00084     XMLBigInteger(const XMLCh* const strValue);
00085 
00086     ~XMLBigInteger();
00087 
00088     XMLBigInteger(const XMLBigInteger& toCopy);
00089 
00090     static void parseBigInteger(const XMLCh* const toConvert
00091                               , XMLCh* const       retBuffer
00092                               , int&   signValue);
00093 
00094     static int  compareValues(const XMLBigInteger* const lValue
00095                              ,const XMLBigInteger* const rValue);
00096 
00097 
00098     void        multiply(const unsigned int byteToShift);
00099 
00100     void        divide(const unsigned int byteToShift);
00101 
00102     int         getTotalDigit() const;
00103 
00109     inline XMLCh*      toString() const;
00110     
00116     inline XMLCh*      getRawData() const;
00117 
00128     bool operator==(const XMLBigInteger& toCompare) const;
00129 
00134     int getSign() const;
00135 
00136     int intValue() const;
00137 
00138 private:
00139 
00140     void setSign(int);
00141 
00142     /*
00143      * The number is internally stored in "minimal" sign-fMagnitude format
00144      * (i.e., no BigIntegers have a leading zero byte in their magnitudes).
00145      * Zero is represented with a signum of 0 (and a zero-length fMagnitude).
00146      * Thus, there is exactly one representation for each value.
00147      */
00148     // -----------------------------------------------------------------------
00149     //  Private data members
00150     //
00151     //  fSign
00152     //     to represent the sign of the number.
00153     //
00154     //  fMagnitude
00155     //     the buffer holding the number.
00156     //
00157     //  fRawData
00158     //     to preserve the original string used to construct this object,
00159     //     needed for pattern matching.
00160     //
00161     // -----------------------------------------------------------------------
00162 
00163     int         fSign;
00164     XMLCh*      fMagnitude;  //null terminated
00165     XMLCh*      fRawData;
00166 
00167 };
00168 
00169 inline int XMLBigInteger::getSign() const
00170 {    
00171     return fSign;
00172 }
00173 
00174 inline int XMLBigInteger::getTotalDigit() const
00175 {
00176     return ((getSign() ==0) ? 0 : XMLString::stringLen(fMagnitude));
00177 }
00178 
00179 inline bool XMLBigInteger::operator==(const XMLBigInteger& toCompare) const
00180 {
00181     return ( compareValues(this, &toCompare) ==0 ? true : false);
00182 }
00183 
00184 inline void XMLBigInteger::setSign(int newSign)
00185 {
00186     fSign = newSign;
00187 }
00188 
00189 inline XMLCh*  XMLBigInteger::getRawData() const
00190 {
00191     return fRawData;
00192 }
00193 
00194 //
00195 // The caller needs to de-allocate the memory allocated by this function
00196 //
00197 inline XMLCh*  XMLBigInteger::toString() const
00198 {
00199     return XMLString::replicate(fRawData);
00200 }
00201 
00202 XERCES_CPP_NAMESPACE_END
00203 
00204 #endif


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