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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 2002/03/06 19:13:12 peiyongz Exp $
    00059  * $Log: XMLAbstractDoubleFloat.hpp,v $
    00060  * Revision 1.4  2002/03/06 19:13:12  peiyongz
    00061  * Patch: more valid lexcial representation for positive/negative zero
    00062  *
    00063  * Revision 1.3  2002/03/01 18:47:37  peiyongz
    00064  * fix: more valid lexcial representation forms for "neural zero"
    00065  *
    00066  * Revision 1.2  2002/02/20 18:17:02  tng
    00067  * [Bug 5977] Warnings on generating apiDocs.
    00068  *
    00069  * Revision 1.1.1.1  2002/02/01 22:22:14  peiyongz
    00070  * sane_include
    00071  *
    00072  * Revision 1.4  2001/11/28 15:39:26  peiyongz
    00073  * return Type& for operator=
    00074  *
    00075  * Revision 1.3  2001/11/22 21:39:00  peiyongz
    00076  * Allow "0.0" to be a valid lexcial representation of ZERO.
    00077  *
    00078  * Revision 1.2  2001/11/22 20:23:00  peiyongz
    00079  * _declspec(dllimport) and inline warning C4273
    00080  *
    00081  * Revision 1.1  2001/11/19 21:33:42  peiyongz
    00082  * Reorganization: Double/Float
    00083  *
    00084  *
    00085  */
    00086
    00087 #ifndef XML_ABSTRACT_DOUBLE_FLOAT_HPP
    00088 #define XML_ABSTRACT_DOUBLE_FLOAT_HPP
    00089
    00090 #include <xercesc/util/XercesDefs.hpp>
    00091 #include <xercesc/util/XMLNumber.hpp>
    00092 #include <xercesc/util/XMLBigDecimal.hpp>
    00093
    00094 /***
    00095  * 3.2.5.1 Lexical representation
    00096  *
    00097  *   double values have a lexical representation consisting of a mantissa followed,
    00098  *   optionally, by the character "E" or "e", followed by an exponent.
    00099  *
    00100  *   The exponent ·must· be an integer.
    00101  *   The mantissa must be a decimal number.
    00102  *   The representations for exponent and mantissa must follow the lexical rules
    00103  *   for integer and decimal.
    00104  *
    00105  *   If the "E" or "e" and the following exponent are omitted,
    00106  *   an exponent value of 0 is assumed.
    00107 ***/
    00108
    00109 /***
    00110  * 3.2.4.1 Lexical representation
    00111  *
    00112  *   float values have a lexical representation consisting of a mantissa followed,
    00113  *   optionally, by the character "E" or "e", followed by an exponent.
    00114  *
    00115  *   The exponent ·must· be an integer.
    00116  *   The mantissa must be a decimal number.
    00117  *   The representations for exponent and mantissa must follow the lexical rules
    00118  *   for integer and decimal.
    00119  *
    00120  *   If the "E" or "e" and the following exponent are omitted,
    00121  *   an exponent value of 0 is assumed.
    00122 ***/
    00123
    00124 class  XMLAbstractDoubleFloat : public XMLNumber
    00125 {
    00126 public:
    00127
    00128     enum LiteralType
    00129     {
    00130         NegINF,
    00131         NegZero,
    00132         PosZero,
    00133         PosINF,
    00134         NaN,
    00135         SpecialTypeNum,
    00136         Normal
    00137     };
    00138
    00139     virtual ~XMLAbstractDoubleFloat();
    00140
    00141     virtual XMLCh*        toString() const;
    00142
    00143     virtual int           getSign() const;
    00144
    00145 protected:
    00146
    00147     //
    00148     // To be used by derived class exclusively
    00149     //
    00150     XMLAbstractDoubleFloat();
    00151
    00152     void                  init(const XMLCh* const strValue);
    00153
    00165
    00166     static int            compareValues(const XMLAbstractDoubleFloat* const lValue
    00167                                       , const XMLAbstractDoubleFloat* const rValue);
    00168
    00169     //
    00170     // to be overwritten by derived class
    00171     //
    00172     virtual void          checkBoundary(const XMLCh* const strValue) = 0;
    00173
    00174 private:
    00175     //
    00176     // Unimplemented
    00177     //
    00178     // copy ctor
    00179     // assignment ctor
    00180     //
    00181     XMLAbstractDoubleFloat(const XMLAbstractDoubleFloat& toCopy);
    00182     XMLAbstractDoubleFloat& operator=(const XMLAbstractDoubleFloat& toAssign);
    00183
    00184     void                  normalizeZero(XMLCh* const);
    00185
    00186     inline bool           isSpecialValue() const;
    00187
    00188     static int            compareSpecial(const XMLAbstractDoubleFloat* const specialValue
    00189                                        , const XMLAbstractDoubleFloat* const normalValue);
    00190
    00191     // -----------------------------------------------------------------------
    00192     //  Private data members
    00193     //
    00194     //  fMantissa
    00195     //     the XMLBigDecimal holding the value of mantissa.
    00196     //
    00197     //  fExponent
    00198     //     the XMLBigInteger holding the value of exponent.
    00199     //
    00200     //  fType
    00201     //     the type of the object.
    00202     //
    00203     // -----------------------------------------------------------------------
    00204
    00205     XMLBigDecimal*          fMantissa;
    00206     XMLBigInteger*          fExponent;
    00207     LiteralType             fType;
    00208 };
    00209
    00210 inline bool XMLAbstractDoubleFloat::isSpecialValue() const
    00211 {
    00212     return (fType < SpecialTypeNum);
    00213 }
    00214
    00215 #endif

Copyright © 2000 The Apache Software Foundation. All Rights Reserved.