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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 1.8 2003/02/02 23:54:43 peiyongz Exp $
    00059  * $Log: XMLAbstractDoubleFloat.hpp,v $
    00060  * Revision 1.8  2003/02/02 23:54:43  peiyongz
    00061  * getFormattedString() added to return original and converted value.
    00062  *
    00063  * Revision 1.7  2003/01/30 21:55:22  tng
    00064  * Performance: create getRawData which is similar to toString but return the internal data directly, user is not required to delete the returned memory.
    00065  *
    00066  * Revision 1.6  2002/12/11 00:20:02  peiyongz
    00067  * Doing businesss in value space. Converting out-of-bound value into special values.
    00068  *
    00069  * Revision 1.5  2002/11/04 15:22:05  tng
    00070  * C++ Namespace Support.
    00071  *
    00072  * Revision 1.4  2002/03/06 19:13:12  peiyongz
    00073  * Patch: more valid lexcial representation for positive/negative zero
    00074  *
    00075  * Revision 1.3  2002/03/01 18:47:37  peiyongz
    00076  * fix: more valid lexcial representation forms for "neural zero"
    00077  *
    00078  * Revision 1.2  2002/02/20 18:17:02  tng
    00079  * [Bug 5977] Warnings on generating apiDocs.
    00080  *
    00081  * Revision 1.1.1.1  2002/02/01 22:22:14  peiyongz
    00082  * sane_include
    00083  *
    00084  * Revision 1.4  2001/11/28 15:39:26  peiyongz
    00085  * return Type& for operator=
    00086  *
    00087  * Revision 1.3  2001/11/22 21:39:00  peiyongz
    00088  * Allow "0.0" to be a valid lexcial representation of ZERO.
    00089  *
    00090  * Revision 1.2  2001/11/22 20:23:00  peiyongz
    00091  * _declspec(dllimport) and inline warning C4273
    00092  *
    00093  * Revision 1.1  2001/11/19 21:33:42  peiyongz
    00094  * Reorganization: Double/Float
    00095  *
    00096  *
    00097  */
    00098
    00099 #ifndef XML_ABSTRACT_DOUBLE_FLOAT_HPP
    00100 #define XML_ABSTRACT_DOUBLE_FLOAT_HPP
    00101
    00102 #include <xercesc/util/XMLNumber.hpp>
    00103
    00104 XERCES_CPP_NAMESPACE_BEGIN
    00105
    00106 /***
    00107  * 3.2.5.1 Lexical representation
    00108  *
    00109  *   double values have a lexical representation consisting of a mantissa followed,
    00110  *   optionally, by the character "E" or "e", followed by an exponent.
    00111  *
    00112  *   The exponent ·must· be an integer.
    00113  *   The mantissa must be a decimal number.
    00114  *   The representations for exponent and mantissa must follow the lexical rules
    00115  *   for integer and decimal.
    00116  *
    00117  *   If the "E" or "e" and the following exponent are omitted,
    00118  *   an exponent value of 0 is assumed.
    00119 ***/
    00120
    00121 /***
    00122  * 3.2.4.1 Lexical representation
    00123  *
    00124  *   float values have a lexical representation consisting of a mantissa followed,
    00125  *   optionally, by the character "E" or "e", followed by an exponent.
    00126  *
    00127  *   The exponent ·must· be an integer.
    00128  *   The mantissa must be a decimal number.
    00129  *   The representations for exponent and mantissa must follow the lexical rules
    00130  *   for integer and decimal.
    00131  *
    00132  *   If the "E" or "e" and the following exponent are omitted,
    00133  *   an exponent value of 0 is assumed.
    00134 ***/
    00135
    00136 class  XMLAbstractDoubleFloat : public XMLNumber
    00137 {
    00138 public:
    00139
    00140     enum LiteralType
    00141     {
    00142         NegINF,
    00143         NegZero,
    00144         PosZero,
    00145         PosINF,
    00146         NaN,
    00147         SpecialTypeNum,
    00148         Normal
    00149     };
    00150
    00151     virtual ~XMLAbstractDoubleFloat();
    00152
    00153     virtual XMLCh*        toString() const;
    00154
    00155     virtual XMLCh*        getRawData() const;
    00156
    00157     virtual const XMLCh*  getFormattedString() const;
    00158
    00159     virtual int           getSign() const;
    00160
    00161 protected:
    00162
    00163     //
    00164     // To be used by derived class exclusively
    00165     //
    00166     XMLAbstractDoubleFloat();
    00167
    00168     void                  init(const XMLCh* const strValue);
    00169
    00182     static int            compareValues(const XMLAbstractDoubleFloat* const lValue
    00183                                       , const XMLAbstractDoubleFloat* const rValue);
    00184
    00185     //
    00186     // to be overwritten by derived class
    00187     //
    00188     virtual void          checkBoundary(const XMLCh* const strValue) = 0;
    00189
    00190 private:
    00191     //
    00192     // Unimplemented
    00193     //
    00194     // copy ctor
    00195     // assignment ctor
    00196     //
    00197     XMLAbstractDoubleFloat(const XMLAbstractDoubleFloat& toCopy);
    00198     XMLAbstractDoubleFloat& operator=(const XMLAbstractDoubleFloat& toAssign);
    00199
    00200     void                  normalizeZero(XMLCh* const);
    00201
    00202     inline bool           isSpecialValue() const;
    00203
    00204     static int            compareSpecial(const XMLAbstractDoubleFloat* const specialValue
    00205                                        , const XMLAbstractDoubleFloat* const normalValue);
    00206
    00207     void                  formatString();
    00208
    00209 protected:
    00210     double                  fValue;
    00211     LiteralType             fType;
    00212     bool                    fDataConverted;
    00213
    00214 private:
    00215     int                     fSign;
    00216     XMLCh*                  fRawData;
    00217
    00218     //
    00219     // If the original string is not lexcially the same as the five
    00220     // special value notations, and the value is converted to
    00221     // special value due underlying platform restriction on data
    00222     // representation, then this string is constructed and
    00223     // takes the form "original_string (special_value_notation)",
    00224     // otherwise it is empty.
    00225     //
    00226     XMLCh*                  fFormattedString;
    00227
    00228 };
    00229
    00230 inline bool XMLAbstractDoubleFloat::isSpecialValue() const
    00231 {
    00232     return (fType < SpecialTypeNum);
    00233 }
    00234
    00235 XERCES_CPP_NAMESPACE_END
    00236
    00237 #endif

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