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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) 2008 Gael Guennebaud <g.gael@free.fr>
//
// Eigen is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// Alternatively, 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 of
// the License, 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 Lesser General Public License or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#ifndef EIGEN_ALLANDANY_H
#define EIGEN_ALLANDANY_H
template<typename Derived, int UnrollCount>
struct ei_all_unroller
{
enum {
col = (UnrollCount-1) / Derived::RowsAtCompileTime,
row = (UnrollCount-1) % Derived::RowsAtCompileTime
};
inline static bool run(const Derived &mat)
{
return ei_all_unroller<Derived, UnrollCount-1>::run(mat) && mat.coeff(row, col);
}
};
template<typename Derived>
struct ei_all_unroller<Derived, 1>
{
inline static bool run(const Derived &mat) { return mat.coeff(0, 0); }
};
template<typename Derived>
struct ei_all_unroller<Derived, Dynamic>
{
inline static bool run(const Derived &) { return false; }
};
template<typename Derived, int UnrollCount>
struct ei_any_unroller
{
enum {
col = (UnrollCount-1) / Derived::RowsAtCompileTime,
row = (UnrollCount-1) % Derived::RowsAtCompileTime
};
inline static bool run(const Derived &mat)
{
return ei_any_unroller<Derived, UnrollCount-1>::run(mat) || mat.coeff(row, col);
}
};
template<typename Derived>
struct ei_any_unroller<Derived, 1>
{
inline static bool run(const Derived &mat) { return mat.coeff(0, 0); }
};
template<typename Derived>
struct ei_any_unroller<Derived, Dynamic>
{
inline static bool run(const Derived &) { return false; }
};
/** \array_module
*
* \returns true if all coefficients are true
*
* \addexample CwiseAll \label How to check whether a point is inside a box (using operator< and all())
*
* Example: \include MatrixBase_all.cpp
* Output: \verbinclude MatrixBase_all.out
*
* \sa MatrixBase::any(), Cwise::operator<()
*/
template<typename Derived>
bool MatrixBase<Derived>::all(void) const
{
const bool unroll = SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost)
<= EIGEN_UNROLLING_LIMIT;
if(unroll)
return ei_all_unroller<Derived,
unroll ? int(SizeAtCompileTime) : Dynamic
>::run(derived());
else
{
for(int j = 0; j < cols(); j++)
for(int i = 0; i < rows(); i++)
if (!coeff(i, j)) return false;
return true;
}
}
/** \array_module
*
* \returns true if at least one coefficient is true
*
* \sa MatrixBase::all()
*/
template<typename Derived>
bool MatrixBase<Derived>::any(void) const
{
const bool unroll = SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost)
<= EIGEN_UNROLLING_LIMIT;
if(unroll)
return ei_any_unroller<Derived,
unroll ? int(SizeAtCompileTime) : Dynamic
>::run(derived());
else
{
for(int j = 0; j < cols(); j++)
for(int i = 0; i < rows(); i++)
if (coeff(i, j)) return true;
return false;
}
}
#endif // EIGEN_ALLANDANY_H
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