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39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef Patternist_Decimal_H
51#define Patternist_Decimal_H
52
53#include <private/qschemanumeric_p.h>
54
55QT_BEGIN_NAMESPACE
56
57namespace QPatternist
58{
59
60 /**
61 * @short Implements the value instance of the @c xs:decimal type.
62 *
63 * @author Frans Englich <frans.englich@nokia.com>
64 * @ingroup Patternist_xdm
65 * @todo Documentation is missing/incomplete
66 */
67 class Decimal : public Numeric
68 {
69 public:
70
71 static Decimal::Ptr fromValue(const xsDecimal num);
72
73 /**
74 * Creates a Decimal from the lexical representation of @c xs:decimal stored in
75 * @p strNumeric.
76 *
77 * A possible optimization is to create an Integer if the string ends
78 * with ".0". But this is not conformant. For example, the user writes N.0
79 * which according to the specification is an xs:decimal, but where the
80 * expression is, is an xs:integer is required. That would pass with
81 * such an optimization.
82 */
83 static AtomicValue::Ptr fromLexical(const QString &strNumeric);
84
85 /**
86 * Gets the Effective %Boolean Value of this number.
87 *
88 * @returns @c false if the number is 0 or @c NaN, otherwise @c true.
89 */
90 bool evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const;
91
92 virtual QString stringValue() const;
93
94 /**
95 * @returns always BuiltinTypes::xsDecimal
96 */
97 virtual ItemType::Ptr type() const;
98
99 virtual xsDouble toDouble() const;
100 virtual xsInteger toInteger() const;
101 virtual xsFloat toFloat() const;
102 virtual xsDecimal toDecimal() const;
103 virtual qulonglong toUnsignedInteger() const;
104
105 virtual Numeric::Ptr round() const;
106 virtual Numeric::Ptr roundHalfToEven(const xsInteger scale) const;
107 virtual Numeric::Ptr floor() const;
108 virtual Numeric::Ptr ceiling() const;
109 virtual Numeric::Ptr abs() const;
110
111 /**
112 * @returns always @c false, xs:decimal doesn't have
113 * not-a-number in its value space.
114 */
115 virtual bool isNaN() const;
116
117 /**
118 * @returns always @c false, xs:decimal doesn't have
119 * infinity in its value space.
120 */
121 virtual bool isInf() const;
122
123 virtual Item toNegated() const;
124
125 /**
126 * Converts @p value into a canonical string representation for @c xs:decimal. This
127 * function is used internally by various classes. Users probably wants to call
128 * stringValue() which in turn calls this function.
129 */
130 static QString toString(const xsDecimal value);
131
132 virtual bool isSigned() const;
133
134 protected:
135
136 Decimal(const xsDecimal num);
137
138 private:
139 const xsDecimal m_value;
140 };
141}
142
143QT_END_NAMESPACE
144
145#endif
146

source code of qtxmlpatterns/src/xmlpatterns/data/qdecimal_p.h