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HxValue.h

/*
 *  Copyright (c) 1998, University of Amsterdam, The Netherlands.
 *  All rights reserved.
 *
 *
 *  Author(s):
 *  Dennis Koelma (koelma@wins.uva.nl)
 *  Edo Poll (poll@wins.uva.nl)
 */

#ifndef HxValue_h
#define HxValue_h

#include "HxScalarInt.h"
#include "HxScalarDouble.h"
#include "HxVec2Int.h"
#include "HxVec2Double.h"
#include "HxVec3Int.h"
#include "HxVec3Double.h"
#include "HxComplex.h"

#include "HxString.h"

class L_HXBASIS HxValue {
public:
    enum Tag { SI, SD, V2I, V2D, V3I, V3D, CPL };


                            HxValue(int i = 0);

                            HxValue(double d);

                            HxValue(HxScalarInt i);

                            HxValue(HxScalarDouble d);

                            HxValue(HxVec2Int v);

                            HxValue(HxVec2Double v);

                            HxValue(HxVec3Int v);

                            HxValue(HxVec3Double v);

                            HxValue(HxComplex v);


    Tag                     tag() const;


    HxScalarInt&            HxScalarIntValue();

    HxScalarDouble&         HxScalarDoubleValue();

    HxVec2Int&              HxVec2IntValue();

    HxVec2Double&           HxVec2DoubleValue();

    HxVec3Int&              HxVec3IntValue();

    HxVec3Double&           HxVec3DoubleValue();

    HxComplex&              HxComplexValue();


                            operator HxScalarInt() const;

                            operator HxScalarDouble() const;

                            operator HxVec2Int() const;

                            operator HxVec2Double() const;

                            operator HxVec3Int() const;

                            operator HxVec3Double() const;

                            operator HxComplex() const;

    HxString                toString() const;
private:

    void                    check(Tag t) const;
    void                    warn(const char*) const;
    friend L_HXBASIS STD_OSTREAM&
                            operator<<(STD_OSTREAM& os, const HxValue val);

    char                    _val[sizeof(HxVec3Double)];
    union {
        Tag                 _tag;
        double              _dummy;
    } _tag;


};

inline const char*
ClassName(const HxValue&)
{
    return "HxValue";
}

inline HxString
makeString(const HxValue& val)
{
    return val.toString();
}

inline
HxValue::HxValue(int v)
{
    _tag._tag = SI;
    new(&_val[0]) HxScalarInt(v);
}

inline
HxValue::HxValue(double v)
{
    _tag._tag = SD;
    new(&_val[0]) HxScalarDouble(v);
}

inline
HxValue::HxValue(HxScalarInt v)
{
    _tag._tag = SI;
    new(&_val[0]) HxScalarInt(v);
}

inline
HxValue::HxValue(HxScalarDouble v)
{
    _tag._tag = SD;
    new(&_val[0]) HxScalarDouble(v);
}

inline
HxValue::HxValue(HxVec2Int v)
{
    _tag._tag = V2I;
    new(&_val[0]) HxVec2Int(v);
}

inline
HxValue::HxValue(HxVec2Double v)
{
    _tag._tag = V2D;
    new(&_val[0]) HxVec2Double(v);
}

inline
HxValue::HxValue(HxVec3Int v)
{
    _tag._tag = V3I;
    new(&_val[0]) HxVec3Int(v);
}

inline
HxValue::HxValue(HxVec3Double v)
{
    _tag._tag = V3D;
    new(&_val[0]) HxVec3Double(v);
}

inline
HxValue::HxValue(HxComplex v)
{
    _tag._tag = CPL;
    new(&_val[0]) HxComplex(v);
}

inline HxValue::Tag
HxValue::tag() const
{
    return _tag._tag;
}

inline HxScalarInt&
HxValue::HxScalarIntValue()
{
    check(SI);
    return *(HxScalarInt *) &_val[0];
}

inline HxScalarDouble&
HxValue::HxScalarDoubleValue()
{
    check(SD);
    return *(HxScalarDouble *) &_val[0];
}

inline HxVec2Int&
HxValue::HxVec2IntValue()
{
    check(V2I);
    return *(HxVec2Int *) &_val[0];
}

inline HxVec2Double&
HxValue::HxVec2DoubleValue()
{
    check(V2D);
    return *(HxVec2Double *) &_val[0];
}

inline HxVec3Int&
HxValue::HxVec3IntValue()
{
    check(V3I);
    return *(HxVec3Int *) &_val[0];
}

inline HxVec3Double&
HxValue::HxVec3DoubleValue()
{
    check(V3D);
    return *(HxVec3Double *) &_val[0];
}

inline HxComplex&
HxValue::HxComplexValue()
{
    check(CPL);
    return *(HxComplex *) &_val[0];
}

inline
HxValue::operator HxScalarInt() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxScalarInt) *(HxScalarInt *) &_val[0];
    case SD:    return (*(HxScalarDouble *) &_val[0]).operator HxScalarInt();
    case V2I:   return (HxScalarInt) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxScalarInt) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxScalarInt) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxScalarInt) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxScalarInt) *(HxComplex *) &_val[0];
    default:    return (HxScalarInt) *(HxScalarInt *) &_val[0];
    }
}

inline
HxValue::operator HxScalarDouble() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxScalarDouble) *(HxScalarInt *) &_val[0];
    case SD:    return (HxScalarDouble) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxScalarDouble) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxScalarDouble) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxScalarDouble) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxScalarDouble) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxScalarDouble) *(HxComplex *) &_val[0];
    default:    return (HxScalarDouble) *(HxScalarDouble *) &_val[0];
    }
}

inline
HxValue::operator HxVec2Int() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxVec2Int) *(HxScalarInt *) &_val[0];
    case SD:    return (HxVec2Int) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxVec2Int) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxVec2Int) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxVec2Int) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxVec2Int) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxVec2Int) *(HxComplex *) &_val[0];
    default:    return (HxVec2Int) *(HxVec2Int *) &_val[0];
    }
}

inline
HxValue::operator HxVec2Double() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxVec2Double) *(HxScalarInt *) &_val[0];
    case SD:    return (HxVec2Double) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxVec2Double) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxVec2Double) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxVec2Double) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxVec2Double) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxVec2Double) *(HxComplex *) &_val[0];
    default:    return (HxVec2Double) *(HxVec2Double *) &_val[0];
    }
}

inline
HxValue::operator HxVec3Int() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxVec3Int) *(HxScalarInt *) &_val[0];
    case SD:    return (HxVec3Int) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxVec3Int) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxVec3Int) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxVec3Int) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxVec3Int) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxVec3Int) *(HxComplex *) &_val[0];
    default:    return (HxVec3Int) *(HxVec3Int *) &_val[0];
    }
}

inline
HxValue::operator HxVec3Double() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxVec3Double) *(HxScalarInt *) &_val[0];
    case SD:    return (HxVec3Double) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxVec3Double) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxVec3Double) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxVec3Double) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxVec3Double) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxVec3Double) *(HxComplex *) &_val[0];
    default:    return (HxVec3Double) *(HxVec3Double *) &_val[0];
    }
}

inline
HxValue::operator HxComplex() const
{
    switch(_tag._tag)
    {
    case SI:    return (HxComplex) *(HxScalarInt *) &_val[0];
    case SD:    return (HxComplex) *(HxScalarDouble *) &_val[0];
    case V2I:   return (HxComplex) *(HxVec2Int *) &_val[0];
    case V2D:   return (HxComplex) *(HxVec2Double *) &_val[0];
    case V3I:   return (HxComplex) *(HxVec3Int *) &_val[0];
    case V3D:   return (HxComplex) *(HxVec3Double *) &_val[0];
    case CPL:   return (HxComplex) *(HxComplex *) &_val[0];
    default:    return (HxComplex) *(HxComplex *) &_val[0];
    }
}

inline void
HxValue::check(Tag t) const
{
    if (t != _tag._tag)
        warn("HxValue: wrong value access.");
}

#endif

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