constantintegraltype.h

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/* This file is part of KDevelop
    Copyright 2002-2005 Roberto Raggi <[email protected]>
    Copyright 2006 Adam Treat <[email protected]>
    Copyright 2006-2008 Hamish Rodda <[email protected]>
    Copyright 2007-2008 David Nolden <[email protected]>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 as published by the Free Software Foundation.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
 */
 
#ifndef KDEVPLATFORM_CONSTANTINTEGRALTYPE_H
#define KDEVPLATFORM_CONSTANTINTEGRALTYPE_H
 
#include "integraltype.h"
#include "typesystemdata.h"
 
namespace KDevelop {
template <typename T>
T constant_value(const qint64* realval)
{
    T value;
    memcpy(&value, realval, sizeof(T));
    return value;
}
 
class KDEVPLATFORMLANGUAGE_EXPORT ConstantIntegralType
    : public IntegralType
{
public:
    ConstantIntegralType(const ConstantIntegralType& rhs);
 
    explicit ConstantIntegralType(ConstantIntegralTypeData& data);
 
    explicit ConstantIntegralType(uint type = TypeNone);
 
    ConstantIntegralType& operator=(const ConstantIntegralType& rhs) = delete;
 
    using Ptr = TypePtr<ConstantIntegralType>;
 
    template <class ValueType>
    void setValue(ValueType value)
    {
        if (AbstractType::modifiers() & UnsignedModifier)
            setValueInternal<quint64>(value);
        else if (IntegralType::dataType() == TypeFloat)
            setValueInternal<float>(value);
        else if (IntegralType::dataType() == TypeDouble)
            setValueInternal<double>(value);
        else
            setValueInternal<qint64>(value);
    }
 
    template <class ValueType>
    ValueType value() const
    {
        if (modifiers() & UnsignedModifier) {
            return constant_value<quint64>(&d_func()->m_value);
        } else if (dataType() == TypeFloat) {
            return constant_value<float>(&d_func()->m_value);
        } else if (dataType() == TypeDouble) {
            return constant_value<double>(&d_func()->m_value);
        } else {
            return constant_value<qint64>(&d_func()->m_value);
        }
    }
 
    qint64 plainValue() const;
 
    QString toString() const override;
 
    QString valueAsString() const;
 
    bool equals(const KDevelop::AbstractType* rhs) const override;
 
    KDevelop::AbstractType* clone() const override;
 
    uint hash() const override;
 
    enum {
        Identity = 14
    };
 
    using Data = ConstantIntegralTypeData;
 
protected:
    TYPE_DECLARE_DATA(ConstantIntegralType);
 
private:
    //Sets the value without casting
    template <class ValueType>
    void setValueInternal(ValueType value);
};
 
template <>
inline ConstantIntegralType* fastCast<ConstantIntegralType*>(AbstractType* from)
{
    if (!from || from->whichType() != KDevelop::AbstractType::TypeIntegral)
        return nullptr;
    else
        return dynamic_cast<ConstantIntegralType*>(from);
}
}
 
#endif // KDEVPLATFORM_CONSTANTINTEGRALTYPE_H