155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_ALLANDANY_H
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#define EIGEN_ALLANDANY_H
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namespace Eigen {
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namespace internal {
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template<typename Derived, int UnrollCount>
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struct all_unroller
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{
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enum {
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col = (UnrollCount-1) / Derived::RowsAtCompileTime,
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row = (UnrollCount-1) % Derived::RowsAtCompileTime
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};
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static inline bool run(const Derived &mat)
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{
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return all_unroller<Derived, UnrollCount-1>::run(mat) && mat.coeff(row, col);
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}
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};
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template<typename Derived>
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struct all_unroller<Derived, 0>
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{
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static inline bool run(const Derived &/*mat*/) { return true; }
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};
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template<typename Derived>
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struct all_unroller<Derived, Dynamic>
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{
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static inline bool run(const Derived &) { return false; }
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};
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template<typename Derived, int UnrollCount>
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struct any_unroller
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{
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enum {
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col = (UnrollCount-1) / Derived::RowsAtCompileTime,
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row = (UnrollCount-1) % Derived::RowsAtCompileTime
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};
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static inline bool run(const Derived &mat)
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{
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return any_unroller<Derived, UnrollCount-1>::run(mat) || mat.coeff(row, col);
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}
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};
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template<typename Derived>
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struct any_unroller<Derived, 0>
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{
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static inline bool run(const Derived & /*mat*/) { return false; }
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};
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template<typename Derived>
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struct any_unroller<Derived, Dynamic>
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{
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static inline bool run(const Derived &) { return false; }
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};
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} // end namespace internal
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/** \returns true if all coefficients are true
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*
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* Example: \include MatrixBase_all.cpp
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* Output: \verbinclude MatrixBase_all.out
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*
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* \sa any(), Cwise::operator<()
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*/
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template<typename Derived>
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inline bool DenseBase<Derived>::all() const
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{
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enum {
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unroll = SizeAtCompileTime != Dynamic
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&& CoeffReadCost != Dynamic
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&& NumTraits<Scalar>::AddCost != Dynamic
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&& SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
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};
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if(unroll)
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return internal::all_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
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else
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{
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for(Index j = 0; j < cols(); ++j)
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for(Index i = 0; i < rows(); ++i)
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if (!coeff(i, j)) return false;
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return true;
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}
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}
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/** \returns true if at least one coefficient is true
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*
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* \sa all()
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*/
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template<typename Derived>
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inline bool DenseBase<Derived>::any() const
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{
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enum {
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unroll = SizeAtCompileTime != Dynamic
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&& CoeffReadCost != Dynamic
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&& NumTraits<Scalar>::AddCost != Dynamic
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&& SizeAtCompileTime * (CoeffReadCost + NumTraits<Scalar>::AddCost) <= EIGEN_UNROLLING_LIMIT
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};
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if(unroll)
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return internal::any_unroller<Derived, unroll ? int(SizeAtCompileTime) : Dynamic>::run(derived());
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else
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{
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for(Index j = 0; j < cols(); ++j)
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for(Index i = 0; i < rows(); ++i)
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if (coeff(i, j)) return true;
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return false;
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}
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}
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/** \returns the number of coefficients which evaluate to true
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*
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* \sa all(), any()
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*/
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template<typename Derived>
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inline typename DenseBase<Derived>::Index DenseBase<Derived>::count() const
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{
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return derived().template cast<bool>().template cast<Index>().sum();
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}
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/** \returns true is \c *this contains at least one Not A Number (NaN).
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*
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* \sa allFinite()
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*/
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template<typename Derived>
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inline bool DenseBase<Derived>::hasNaN() const
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{
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return !((derived().array()==derived().array()).all());
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}
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/** \returns true if \c *this contains only finite numbers, i.e., no NaN and no +/-INF values.
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*
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* \sa hasNaN()
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*/
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template<typename Derived>
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inline bool DenseBase<Derived>::allFinite() const
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{
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return !((derived()-derived()).hasNaN());
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}
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} // end namespace Eigen
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#endif // EIGEN_ALLANDANY_H
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