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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.