Qt 4.8
qabstractfloatmathematician.cpp
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41 
42 /*
43  * @file
44  * @short This file is included by qatomicmathematicians_p.h
45  * if you need some includes, put them in qabstractfloatmathematician_p.h, outside of the namespace.
46  */
47 
48 template <const bool isDouble>
50  const Operator op,
51  const Item &o2,
53 {
54  const Numeric *const num1 = o1.template as<Numeric>();
55  const Numeric *const num2 = o2.template as<Numeric>();
56  switch(op)
57  {
58  case Div:
59  return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() / num2->toDouble()));
60  case IDiv:
61  {
62  if(num1->isNaN() || num2->isNaN())
63  {
64  context->error(QtXmlPatterns::tr("No operand in an integer division, %1, can be %2.")
65  .arg(formatKeyword("idiv"))
66  .arg(formatData("NaN")),
67  ReportContext::FOAR0002, this);
68  }
69  else if(num1->isInf())
70  {
71  context->error(QtXmlPatterns::tr("The first operand in an integer division, %1, cannot be infinity (%2).")
72  .arg(formatKeyword("idiv"))
73  .arg(formatData("INF")),
74  ReportContext::FOAR0002, this);
75  }
76  else if(num2->toInteger() == 0)
77  context->error(QtXmlPatterns::tr("The second operand in a division, %1, cannot be zero (%2).")
78  .arg(formatKeyword("idiv"))
79  .arg(formatData("0")),
80  ReportContext::FOAR0001, this);
81 
82  return Integer::fromValue(static_cast<xsInteger>(num1->toDouble() / num2->toDouble()));
83  }
84  case Substract:
85  return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() - num2->toDouble()));
86  case Mod:
87  return toItem(AbstractFloat<isDouble>::fromValue(::fmod(num1->toDouble(), num2->toDouble())));
88  case Multiply:
89  return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() * num2->toDouble()));
90  case Add:
91  return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() + num2->toDouble()));
92  }
93 
94  Q_ASSERT(false);
95  return Item(); /* GCC unbarfer. */
96 }
97 
Base template class for Float and Double classes.
static QString formatKeyword(const VariableDeclaration::Ptr &var, const NamePool::Ptr &np)
Formats var appropriately for display.
Item toItem(const QExplicitlySharedDataPointer< T > atomicValue)
Definition: qitem_p.h:431
#define Q_ASSERT(cond)
Definition: qglobal.h:1823
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
Performs arithmetics between AbstractFloat values (Float and Double classes).
Base class for all numeric values.
virtual xsDouble toDouble() const =0
virtual bool isNaN() const =0
virtual bool isInf() const =0
static QString formatData(const QXmlNodeModelIndex node)
Definition: qitem_p.h:440