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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
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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
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