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XMLAbstractDoubleFloat.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: XMLAbstractDoubleFloat.hpp,v 1.4 2001/11/28 15:39:26 peiyongz Exp $
00059  * $Log: XMLAbstractDoubleFloat.hpp,v $
00060  * Revision 1.4  2001/11/28 15:39:26  peiyongz
00061  * return Type& for operator=
00062  *
00063  * Revision 1.3  2001/11/22 21:39:00  peiyongz
00064  * Allow "0.0" to be a valid lexcial representation of ZERO.
00065  *
00066  * Revision 1.2  2001/11/22 20:23:00  peiyongz
00067  * _declspec(dllimport) and inline warning C4273
00068  *
00069  * Revision 1.1  2001/11/19 21:33:42  peiyongz
00070  * Reorganization: Double/Float
00071  *
00072  *
00073  */
00074 
00075 #ifndef XML_ABSTRACT_DOUBLE_FLOAT_HPP
00076 #define XML_ABSTRACT_DOUBLE_FLOAT_HPP
00077 
00078 #include <util/XercesDefs.hpp>
00079 #include <util/XMLNumber.hpp>
00080 #include <util/XMLBigDecimal.hpp>
00081 
00082 /***
00083  * 3.2.5.1 Lexical representation
00084  *
00085  *   double values have a lexical representation consisting of a mantissa followed, 
00086  *   optionally, by the character "E" or "e", followed by an exponent. 
00087  *
00088  *   The exponent ·must· be an integer. 
00089  *   The mantissa must be a decimal number. 
00090  *   The representations for exponent and mantissa must follow the lexical rules 
00091  *   for integer and decimal. 
00092  *
00093  *   If the "E" or "e" and the following exponent are omitted, 
00094  *   an exponent value of 0 is assumed. 
00095 ***/
00096 
00097 /***
00098  * 3.2.4.1 Lexical representation
00099  *
00100  *   float values have a lexical representation consisting of a mantissa followed, 
00101  *   optionally, by the character "E" or "e", followed by an exponent. 
00102  *
00103  *   The exponent ·must· be an integer. 
00104  *   The mantissa must be a decimal number. 
00105  *   The representations for exponent and mantissa must follow the lexical rules 
00106  *   for integer and decimal. 
00107  *
00108  *   If the "E" or "e" and the following exponent are omitted, 
00109  *   an exponent value of 0 is assumed. 
00110 ***/
00111 
00112 class  XMLAbstractDoubleFloat : public XMLNumber
00113 {
00114 public:
00115 
00116     enum LiteralType
00117     {
00118         NegINF,
00119         NegZero,
00120         NeuralZero,
00121         PosZero,
00122         PosINF,
00123         NaN,
00124         SpecialTypeNum,
00125         Normal
00126     };
00127 
00128     virtual ~XMLAbstractDoubleFloat();
00129   
00130     virtual XMLCh*        toString() const;
00131 
00132     virtual int           getSign() const;
00133 
00134 protected:
00135 
00136     //
00137     // To be used by derived class exclusively
00138     //
00139     XMLAbstractDoubleFloat();
00140     
00141     void                  init(const XMLCh* const strValue);
00142 
00153 
00154     static int            compareValues(const XMLAbstractDoubleFloat* const lValue
00155                                       , const XMLAbstractDoubleFloat* const rValue);
00156 
00157     //
00158     // to be overwritten by derived class
00159     //
00160     virtual void          checkBoundary(const XMLCh* const strValue) = 0;
00161 
00162 private:
00163     //
00164     // Unimplemented
00165     //
00166     // copy ctor
00167     // assignment ctor
00168     //
00169     XMLAbstractDoubleFloat(const XMLAbstractDoubleFloat& toCopy);
00170     XMLAbstractDoubleFloat& operator=(const XMLAbstractDoubleFloat& toAssign);
00171 
00172     inline bool           isSpecialValue() const;
00173 
00174     static int            compareSpecial(const XMLAbstractDoubleFloat* const specialValue
00175                                        , const XMLAbstractDoubleFloat* const normalValue);
00176 
00177     // -----------------------------------------------------------------------
00178     //  Private data members
00179     //
00180     //  fMantissa
00181     //     the XMLBigDecimal holding the value of mantissa.
00182     //
00183     //  fExponent
00184     //     the XMLBigInteger holding the value of exponent.
00185     //
00186     //  fType
00187     //     the type of the object.
00188     //
00189     // -----------------------------------------------------------------------
00190 
00191     XMLBigDecimal*          fMantissa;
00192     XMLBigInteger*          fExponent;   
00193     LiteralType             fType;
00194 };
00195 
00196 inline bool XMLAbstractDoubleFloat::isSpecialValue() const
00197 {
00198     return (fType < SpecialTypeNum);
00199 }
00200 
00201 #endif


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