| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
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| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
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| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| |
| #ifndef Patternist_AbstractFloat_H |
| #define Patternist_AbstractFloat_H |
| |
| #include <math.h> |
| |
| #include <qnumeric.h> |
| |
| #include <private/qcommonvalues_p.h> |
| #include <private/qdecimal_p.h> |
| #include <private/qschemanumeric_p.h> |
| #include <private/qvalidationerror_p.h> |
| #include <private/qbuiltintypes_p.h> |
| #include <private/qlocale_tools_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| /** |
| * @short Base template class for Float and Double classes. |
| * |
| * @author Vincent Ricard <magic@magicninja.org> |
| * @ingroup Patternist_xdm |
| */ |
| template <const bool isDouble> |
| class AbstractFloat : public Numeric |
| { |
| public: |
| static Numeric::Ptr fromValue(const xsDouble num); |
| static AtomicValue::Ptr fromLexical(const QString &strNumeric); |
| |
| /** |
| * @todo more extensive docs. |
| * |
| * Performs floating point comparison. |
| * |
| * @returns @c true if @p a and @p are equal, otherwise @c false. |
| */ |
| static bool isEqual(const xsDouble a, const xsDouble b); |
| |
| /** |
| * Determines the Effective %Boolean Value of this number. |
| * |
| * @returns @c false if the number is 0 or @c NaN, otherwise @c true. |
| */ |
| bool evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const; |
| |
| /** |
| * Returns this AbstractFloat represented as an @c xs:string. |
| * |
| * @note In the XPath/XQuery languages, converting @c xs:double and @c xs:float |
| * to @c xs:string is not specified in XML Schema 1.0 Part 2: Datatypes Second Edition, |
| * but in XQuery 1.0 and XPath 2.0 Functions and Operators. This will change with W3C XML |
| * Schema 1.1 |
| * |
| * @see <a href="http://www.w3.org/TR/xpath-functions/#casting-to-string">XQuery 1.0 |
| * and XPath 2.0 Functions and Operators, 17.1.2 Casting to xs:string and xdt:untypedAtomic</a> |
| */ |
| virtual QString stringValue() const; |
| |
| virtual xsDouble toDouble() const; |
| virtual xsInteger toInteger() const; |
| virtual xsFloat toFloat() const; |
| virtual xsDecimal toDecimal() const; |
| |
| virtual Numeric::Ptr round() const; |
| virtual Numeric::Ptr roundHalfToEven(const xsInteger scale) const; |
| virtual Numeric::Ptr floor() const; |
| virtual Numeric::Ptr ceiling() const; |
| virtual Numeric::Ptr abs() const; |
| |
| virtual bool isNaN() const; |
| virtual bool isInf() const; |
| |
| virtual ItemType::Ptr type() const; |
| virtual Item toNegated() const; |
| virtual qulonglong toUnsignedInteger() const; |
| |
| virtual bool isSigned() const; |
| protected: |
| AbstractFloat(const xsDouble num); |
| |
| private: |
| /** |
| * From the Open Group's man page: "The signbit() macro shall return a |
| * non-zero value if and only if the sign of its argument value is |
| * negative." |
| * |
| * MS Windows doesn't have std::signbit() so here's |
| * a reinvention of that function. |
| */ |
| static inline int internalSignbit(const xsDouble v); |
| inline bool isZero() const; |
| |
| const xsDouble m_value; |
| }; |
| |
| template <const bool isDouble> |
| Numeric::Ptr createFloat(const xsDouble num); |
| |
| #include "qabstractfloat_tpl_p.h" |
| |
| /** |
| * @short An instantiation of AbsbstractFloat suitable for @c xs:double. |
| * |
| * @ingroup Patternist_xdm |
| */ |
| typedef AbstractFloat<true> Double; |
| |
| /** |
| * @short An instantiation of AbstractFloat suitable for @c xs:float. |
| * |
| * @ingroup Patternist_xdm |
| */ |
| typedef AbstractFloat<false> Float; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |