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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);
+ }
+ }
+
+
+
+//! @}