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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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