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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 1.13 2003/05/18 14:02:05 knoaman Exp $
00059  * $Log: XMLAbstractDoubleFloat.hpp,v $
00060  * Revision 1.13  2003/05/18 14:02:05  knoaman
00061  * Memory manager implementation: pass per instance manager.
00062  *
00063  * Revision 1.12  2003/05/16 06:01:53  knoaman
00064  * Partial implementation of the configurable memory manager.
00065  *
00066  * Revision 1.11  2003/05/15 19:07:46  knoaman
00067  * Partial implementation of the configurable memory manager.
00068  *
00069  * Revision 1.10  2003/05/09 15:13:46  peiyongz
00070  * Deprecated toString() in XMLNumber family
00071  *
00072  * Revision 1.9  2003/03/10 20:55:58  peiyongz
00073  * Schema Errata E2-40 double/float
00074  *
00075  * Revision 1.8  2003/02/02 23:54:43  peiyongz
00076  * getFormattedString() added to return original and converted value.
00077  *
00078  * Revision 1.7  2003/01/30 21:55:22  tng
00079  * Performance: create getRawData which is similar to toString but return the internal data directly, user is not required to delete the returned memory.
00080  *
00081  * Revision 1.6  2002/12/11 00:20:02  peiyongz
00082  * Doing businesss in value space. Converting out-of-bound value into special values.
00083  *
00084  * Revision 1.5  2002/11/04 15:22:05  tng
00085  * C++ Namespace Support.
00086  *
00087  * Revision 1.4  2002/03/06 19:13:12  peiyongz
00088  * Patch: more valid lexcial representation for positive/negative zero
00089  *
00090  * Revision 1.3  2002/03/01 18:47:37  peiyongz
00091  * fix: more valid lexcial representation forms for "neural zero"
00092  *
00093  * Revision 1.2  2002/02/20 18:17:02  tng
00094  * [Bug 5977] Warnings on generating apiDocs.
00095  *
00096  * Revision 1.1.1.1  2002/02/01 22:22:14  peiyongz
00097  * sane_include
00098  *
00099  * Revision 1.4  2001/11/28 15:39:26  peiyongz
00100  * return Type& for operator=
00101  *
00102  * Revision 1.3  2001/11/22 21:39:00  peiyongz
00103  * Allow "0.0" to be a valid lexcial representation of ZERO.
00104  *
00105  * Revision 1.2  2001/11/22 20:23:00  peiyongz
00106  * _declspec(dllimport) and inline warning C4273
00107  *
00108  * Revision 1.1  2001/11/19 21:33:42  peiyongz
00109  * Reorganization: Double/Float
00110  *
00111  *
00112  */
00113 
00114 #ifndef XML_ABSTRACT_DOUBLE_FLOAT_HPP
00115 #define XML_ABSTRACT_DOUBLE_FLOAT_HPP
00116 
00117 #include <xercesc/util/XMLNumber.hpp>
00118 #include <xercesc/util/PlatformUtils.hpp>
00119 
00120 XERCES_CPP_NAMESPACE_BEGIN
00121 
00122 /***
00123  * 3.2.5.1 Lexical representation
00124  *
00125  *   double values have a lexical representation consisting of a mantissa followed,
00126  *   optionally, by the character "E" or "e", followed by an exponent.
00127  *
00128  *   The exponent ·must· be an integer.
00129  *   The mantissa must be a decimal number.
00130  *   The representations for exponent and mantissa must follow the lexical rules
00131  *   for integer and decimal.
00132  *
00133  *   If the "E" or "e" and the following exponent are omitted,
00134  *   an exponent value of 0 is assumed.
00135 ***/
00136 
00137 /***
00138  * 3.2.4.1 Lexical representation
00139  *
00140  *   float values have a lexical representation consisting of a mantissa followed,
00141  *   optionally, by the character "E" or "e", followed by an exponent.
00142  *
00143  *   The exponent ·must· be an integer.
00144  *   The mantissa must be a decimal number.
00145  *   The representations for exponent and mantissa must follow the lexical rules
00146  *   for integer and decimal.
00147  *
00148  *   If the "E" or "e" and the following exponent are omitted,
00149  *   an exponent value of 0 is assumed.
00150 ***/
00151 
00152 class  XMLAbstractDoubleFloat : public XMLNumber
00153 {
00154 public:
00155 
00156     enum LiteralType
00157     {
00158         NegINF,
00159         PosINF,
00160         NaN,
00161         SpecialTypeNum,
00162         Normal
00163     };
00164 
00165     virtual ~XMLAbstractDoubleFloat();
00166 
00172     virtual XMLCh*        toString() const;
00173     
00174     virtual XMLCh*        getRawData() const;
00175 
00176     virtual const XMLCh*  getFormattedString() const;
00177 
00178     virtual int           getSign() const;
00179 
00180     MemoryManager*        getMemoryManager() const;
00181 
00182 protected:
00183 
00184     //
00185     // To be used by derived class exclusively
00186     //
00187     XMLAbstractDoubleFloat(MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
00188 
00189     void                  init(const XMLCh* const strValue);
00190 
00203     static int            compareValues(const XMLAbstractDoubleFloat* const lValue
00204                                       , const XMLAbstractDoubleFloat* const rValue);
00205 
00206     //
00207     // to be overwritten by derived class
00208     //
00209     virtual void          checkBoundary(const XMLCh* const strValue) = 0;
00210 
00211 private:
00212     //
00213     // Unimplemented
00214     //
00215     // copy ctor
00216     // assignment ctor
00217     //
00218     XMLAbstractDoubleFloat(const XMLAbstractDoubleFloat& toCopy);
00219     XMLAbstractDoubleFloat& operator=(const XMLAbstractDoubleFloat& toAssign);
00220 
00221     void                  normalizeZero(XMLCh* const);
00222 
00223     inline bool           isSpecialValue() const;
00224 
00225     static int            compareSpecial(const XMLAbstractDoubleFloat* const specialValue
00226                                        , const XMLAbstractDoubleFloat* const normalValue);
00227 
00228     void                  formatString();
00229 
00230 protected:
00231     double                  fValue;
00232     LiteralType             fType;
00233     bool                    fDataConverted;
00234 
00235 private:
00236     int                     fSign;
00237     XMLCh*                  fRawData;
00238 
00239     //
00240     // If the original string is not lexcially the same as the five
00241     // special value notations, and the value is converted to
00242     // special value due underlying platform restriction on data
00243     // representation, then this string is constructed and
00244     // takes the form "original_string (special_value_notation)", 
00245     // otherwise it is empty.
00246     //
00247     XMLCh*                  fFormattedString;
00248     MemoryManager*          fMemoryManager;
00249 };
00250 
00251 inline bool XMLAbstractDoubleFloat::isSpecialValue() const
00252 {
00253     return (fType < SpecialTypeNum);
00254 }
00255 
00256 inline MemoryManager* XMLAbstractDoubleFloat::getMemoryManager() const
00257 {
00258     return fMemoryManager;
00259 }
00260 
00261 XERCES_CPP_NAMESPACE_END
00262 
00263 #endif


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