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     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists purely as an

    47 // implementation detail.  This header file may change from version to

    48 // version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 

    52 #ifndef Patternist_Decimal_H

    53 #define Patternist_Decimal_H

    54 

    55 #include "qschemanumeric_p.h"

    56 

    57 QT_BEGIN_HEADER

    58 

    59 QT_BEGIN_NAMESPACE

    60 

    61 /**

    62  * Defined in QtCore's qlocale.cpp.

    63  */

    64 extern char *qdtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **resultp);

    65 

    66 namespace QPatternist

    67 {

    68 

    69     /**

    70      * @short Implements the value instance of the @c xs:decimal type.

    71      *

    72      * @author Frans Englich <frans.englich@nokia.com>

    73      * @ingroup Patternist_xdm

    74      * @todo Documentation is missing/incomplete

    75      */

    76     class Decimal : public Numeric

    77     {

    78     public:

    79 

    80         static Decimal::Ptr fromValue(const xsDecimal num);

    81 

    82         /**

    83          * Creates a Decimal from the lexical representation of @c xs:decimal stored in

    84          * @p strNumeric.

    85          *

    86          * A possible optimization is to create an Integer if the string ends

    87          * with ".0". But this is not conformant. For example, the user writes N.0

    88          * which according to the specification is an xs:decimal, but where the

    89          * expression is, is an xs:integer is required. That would pass with

    90          * such an optimization.

    91          */

    92         static AtomicValue::Ptr fromLexical(const QString &strNumeric);

    93 

    94         /**

    95          * Gets the Effective %Boolean Value of this number.

    96          *

    97          * @returns @c false if the number is 0 or @c NaN, otherwise @c true.

    98          */

    99         bool evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const;

   100 

   101         virtual QString stringValue() const;

   102 

   103         /**

   104          * @returns always BuiltinTypes::xsDecimal

   105          */

   106         virtual ItemType::Ptr type() const;

   107 

   108         virtual xsDouble toDouble() const;

   109         virtual xsInteger toInteger() const;

   110         virtual xsFloat toFloat() const;

   111         virtual xsDecimal toDecimal() const;

   112         virtual qulonglong toUnsignedInteger() const;

   113 

   114         virtual Numeric::Ptr round() const;

   115         virtual Numeric::Ptr roundHalfToEven(const xsInteger scale) const;

   116         virtual Numeric::Ptr floor() const;

   117         virtual Numeric::Ptr ceiling() const;

   118         virtual Numeric::Ptr abs() const;

   119 

   120         /**

   121          * @returns always @c false, xs:decimal doesn't have

   122          * not-a-number in its value space.

   123          */

   124         virtual bool isNaN() const;

   125 

   126         /**

   127          * @returns always @c false, xs:decimal doesn't have

   128          * infinity in its value space.

   129          */

   130         virtual bool isInf() const;

   131 

   132         virtual Item toNegated() const;

   133 

   134         /**

   135          * Converts @p value into a canonical string representation for @c xs:decimal. This

   136          * function is used internally by various classes. Users probably wants to call

   137          * stringValue() which in turn calls this function.

   138          */

   139         static QString toString(const xsDecimal value);

   140 

   141         virtual bool isSigned() const;

   142 

   143     protected:

   144 

   145         Decimal(const xsDecimal num);

   146 

   147     private:

   148         const xsDecimal m_value;

   149     };

   150 }

   151 

   152 QT_END_NAMESPACE

   153 

   154 QT_END_HEADER

   155 

   156 #endif