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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 | |
55 | QT_BEGIN_NAMESPACE |
56 | |
57 | namespace 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 | |
143 | QT_END_NAMESPACE |
144 | |
145 | #endif |
146 | |