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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 or (at your option) any later version.
//
// Eigen 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 General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License along
// with Eigen; if not, write to the Free Software Foundation, Inc., 51
// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. This exception does not invalidate any other reasons why a work
// based on this file might be covered by the GNU General Public License.
#ifndef EI_OBJECT_H
#define EI_OBJECT_H
template<typename Scalar, typename Derived> class EiObject
{
static const int RowsAtCompileTime = Derived::RowsAtCompileTime,
ColsAtCompileTime = Derived::ColsAtCompileTime;
template<typename OtherDerived>
void _copy_helper(const EiObject<Scalar, OtherDerived>& other);
public:
static const int SizeAtCompileTime
= RowsAtCompileTime == EiDynamic || ColsAtCompileTime == EiDynamic
? EiDynamic : RowsAtCompileTime * ColsAtCompileTime;
static const bool IsVector = RowsAtCompileTime == 1 || ColsAtCompileTime == 1;
typedef typename EiForwardDecl<Derived>::Ref Ref;
typedef typename EiForwardDecl<Derived>::ConstRef ConstRef;
typedef typename EiNumTraits<Scalar>::Real RealScalar;
int rows() const { return static_cast<const Derived *>(this)->_rows(); }
int cols() const { return static_cast<const Derived *>(this)->_cols(); }
int size() const { return rows() * cols(); }
Ref ref()
{ return static_cast<Derived *>(this)->_ref(); }
ConstRef constRef() const
{ return static_cast<const Derived *>(this)->_constRef(); }
Scalar& write(int row, int col)
{
return static_cast<Derived *>(this)->_write(row, col);
}
Scalar read(int row, int col) const
{
return static_cast<const Derived *>(this)->_read(row, col);
}
template<typename OtherDerived>
Derived& operator=(const EiObject<Scalar, OtherDerived>& other)
{
assert(rows() == other.rows() && cols() == other.cols());
_copy_helper(other);
return *static_cast<Derived*>(this);
}
//special case of the above template operator=. Strangely, g++ 4.1 failed to use
//that template when OtherDerived == Derived
Derived& operator=(const EiObject& other)
{
assert(rows() == other.rows() && cols() == other.cols());
_copy_helper(other);
return *static_cast<Derived*>(this);
}
EiRow<Derived> row(int i);
EiColumn<Derived> col(int i);
EiMinor<Derived> minor(int row, int col);
EiBlock<Derived> block(int startRow, int endRow, int startCol, int endCol);
EiTranspose<Derived> transpose();
EiConjugate<Derived> conjugate() const;
EiTranspose<EiConjugate<Derived> > adjoint() const { return conjugate().transpose(); }
Scalar trace() const;
template<typename OtherDerived>
Scalar dot(const OtherDerived& other) const;
RealScalar norm2() const;
RealScalar norm() const;
EiScalarProduct<Derived> normalized() const;
static EiEval<EiRandom<Derived> >
random(int rows = RowsAtCompileTime, int cols = ColsAtCompileTime);
template<typename OtherDerived>
bool isApprox(const OtherDerived& other) const;
template<typename OtherDerived>
bool isNegligible(const OtherDerived& other) const;
template<typename OtherDerived>
EiMatrixProduct<Derived, OtherDerived>
lazyMul(const EiObject<Scalar, OtherDerived>& other) const EI_ALWAYS_INLINE;
template<typename OtherDerived>
Derived& operator+=(const EiObject<Scalar, OtherDerived>& other);
template<typename OtherDerived>
Derived& operator-=(const EiObject<Scalar, OtherDerived>& other);
template<typename OtherDerived>
Derived& operator*=(const EiObject<Scalar, OtherDerived>& other);
Derived& operator*=(const int& other);
Derived& operator*=(const float& other);
Derived& operator*=(const double& other);
Derived& operator*=(const std::complex<int>& other);
Derived& operator*=(const std::complex<float>& other);
Derived& operator*=(const std::complex<double>& other);
Derived& operator/=(const int& other);
Derived& operator/=(const float& other);
Derived& operator/=(const double& other);
Derived& operator/=(const std::complex<int>& other);
Derived& operator/=(const std::complex<float>& other);
Derived& operator/=(const std::complex<double>& other);
Scalar operator()(int row, int col) const
{ return read(row, col); }
Scalar& operator()(int row, int col)
{ return write(row, col); }
Scalar operator[](int index) const
{
assert(IsVector);
if(RowsAtCompileTime == 1) return read(0, index);
else return read(index, 0);
}
Scalar& operator[](int index)
{
assert(IsVector);
if(RowsAtCompileTime == 1) return write(0, index);
else return write(index, 0);
}
EiEval<Derived> eval() const EI_ALWAYS_INLINE;
};
template<typename Scalar, typename Derived>
std::ostream & operator <<
( std::ostream & s,
const EiObject<Scalar, Derived> & m )
{
for( int i = 0; i < m.rows(); i++ )
{
s << m( i, 0 );
for (int j = 1; j < m.cols(); j++ )
s << " " << m( i, j );
if( i < m.rows() - 1)
s << std::endl;
}
return s;
}
#endif // EI_OBJECT_H
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