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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup glue_polyval
//! @{
template<typename eT>
inline
void
glue_polyval::apply_noalias(Mat<eT>& out, const Mat<eT>& P, const Mat<eT>& X)
{
arma_extra_debug_sigprint();
out.set_size(X.n_rows, X.n_cols);
const eT* P_mem = P.memptr();
const uword P_n_elem = P.n_elem;
out.fill(P_mem[0]);
for(uword i=1; i < P_n_elem; ++i)
{
out = out % X + P_mem[i];
}
}
template<typename T1, typename T2>
inline
void
glue_polyval::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_polyval>& expr)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const quasi_unwrap<T1> UP(expr.A);
const quasi_unwrap<T2> UX(expr.B);
const Mat<eT>& P = UP.M;
const Mat<eT>& X = UX.M;
arma_debug_check( ((P.is_vec() == false) && (P.is_empty() == false)), "polyval(): argument P must be a vector" );
if(P.is_empty() || X.is_empty())
{
out.zeros(X.n_rows, X.n_cols);
return;
}
if(UP.is_alias(out) || UX.is_alias(out))
{
Mat<eT> tmp;
glue_polyval::apply_noalias(tmp, P, X);
out.steal_mem(tmp);
}
else
{
glue_polyval::apply_noalias(out, P, X);
}
}
//! @}
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