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XMLFloat.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: XMLFloat.hpp,v 1.5 2001/10/25 21:54:50 peiyongz Exp $
00059  * $Log: XMLFloat.hpp,v $
00060  * Revision 1.5  2001/10/25 21:54:50  peiyongz
00061  * Apply XMLRegisterCleanup
00062  *
00063  * Revision 1.4  2001/09/27 14:54:20  peiyongz
00064  * DTV Reorganization: derived from XMLNumber
00065  *
00066  * Revision 1.3  2001/08/29 19:03:03  peiyongz
00067  * Bugzilla# 2816:on AIX 4.2, xlC 3 r ev.1, Compilation error on inline method
00068  *
00069  * Revision 1.2  2001/07/31 13:48:29  peiyongz
00070  * fValue removed
00071  *
00072  * Revision 1.1  2001/07/26 20:41:37  peiyongz
00073  * XMLFloat
00074  *
00075  *
00076  */
00077 
00078 #ifndef XML_FLOAT_HPP
00079 #define XML_FLOAT_HPP
00080 
00081 #include <util/XercesDefs.hpp>
00082 #include <util/XMLNumber.hpp>
00083 #include <util/XMLBigDecimal.hpp>
00084 
00085 /***
00086  * 3.2.4.1 Lexical representation
00087  *
00088  *   float values have a lexical representation consisting of a mantissa followed, 
00089  *   optionally, by the character "E" or "e", followed by an exponent. 
00090  *
00091  *   The exponent ·must· be an integer. 
00092  *   The mantissa must be a decimal number. 
00093  *   The representations for exponent and mantissa must follow the lexical rules 
00094  *   for integer and decimal. 
00095  *
00096  *   If the "E" or "e" and the following exponent are omitted, 
00097  *   an exponent value of 0 is assumed. 
00098 ***/
00099 
00100 class  XMLFloat : public XMLNumber
00101 {
00102 public:
00103 
00113 
00114     enum LiteralType
00115     {
00116         NegINF,
00117         NegZero,
00118         PosZero,
00119         PosINF,
00120         NaN,
00121         SpecialTypeNum = 5,
00122         Normal
00123     };
00124 
00125     XMLFloat(const XMLCh* const strValue);
00126 
00127     ~XMLFloat();
00128 
00129     XMLFloat(const XMLFloat& toCopy);
00130    
00131     virtual XMLCh*       toString() const;    
00132 
00133     virtual int          getSign() const;
00134 
00145     bool operator==(const XMLFloat& toCompare) const;
00146 
00147     static int            compareValues(const XMLFloat* const lValue
00148                                       , const XMLFloat* const rValue);
00149 
00150     // -----------------------------------------------------------------------
00151     //  Notification that lazy data has been deleted
00152     // -----------------------------------------------------------------------
00153     static void reinitXMLFloat();   
00154 
00155 private:
00156 
00157     void                  init(const XMLCh* const strValue);
00158 
00159     void                  checkBoundary(const XMLCh* const strValue);
00160 
00161     void                  cleanUp();
00162 
00163     bool                  isSpecialValue() const;
00164 
00165     static int            compareSpecial(const XMLFloat* const specialValue
00166                                        , const XMLFloat* const normalValue);
00167 
00168     static bool           isInitialized;
00169 
00170     // -----------------------------------------------------------------------
00171     //  Private data members
00172     //
00173     //  fMantissa
00174     //     the XMLBigDecimal holding the value of mantissa.
00175     //
00176     //  fExponent
00177     //     the XMLBigInteger holding the value of exponent.
00178     //
00179     //  fType
00180     //     the type of the object.
00181     //
00182     // -----------------------------------------------------------------------
00183 
00184     XMLBigDecimal*          fMantissa;
00185     XMLBigInteger*          fExponent;   
00186     LiteralType             fType;
00187 };
00188 
00189 inline bool XMLFloat::operator==(const XMLFloat& toCompare) const
00190 {
00191     return ( XMLFloat::compareValues(this, &toCompare) == 0 ? true : false);
00192 }
00193 
00194 inline bool XMLFloat::isSpecialValue() const
00195 {
00196     return (fType < SpecialTypeNum);
00197 }
00198 
00199 inline void XMLFloat::cleanUp()
00200 {
00201     if (fMantissa)
00202         delete fMantissa;
00203 
00204     if (fExponent)
00205         delete fExponent;
00206 }
00207 
00208 inline int XMLFloat::getSign() const
00209 {
00210     return fMantissa->getSign();
00211 }
00212 
00213 inline XMLFloat::~XMLFloat()
00214 {
00215     cleanUp();
00216 }
00217 
00218 #endif


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