255 lines
6.0 KiB
C++
255 lines
6.0 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2008-2016 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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//! \addtogroup op_vecnorm
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//! @{
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template<typename T1>
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inline
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void
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op_vecnorm::apply(Mat<typename T1::pod_type>& out, const mtOp<typename T1::pod_type, T1, op_vecnorm>& in)
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{
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arma_debug_sigprint();
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typedef typename T1::elem_type in_eT;
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typedef typename T1::pod_type out_eT;
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const quasi_unwrap<T1> U(in.m);
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const Mat<in_eT>& X = U.M;
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const uword k = in.aux_uword_a;
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const uword dim = in.aux_uword_b;
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arma_conform_check( (k == 0), "vecnorm(): unsupported vector norm type" );
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arma_conform_check( (dim > 1), "vecnorm(): parameter 'dim' must be 0 or 1" );
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if(U.is_alias(out))
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{
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Mat<out_eT> tmp;
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op_vecnorm::apply_noalias(tmp, X, k, dim);
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out.steal_mem(tmp);
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}
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else
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{
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op_vecnorm::apply_noalias(out, X, k, dim);
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}
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}
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template<typename in_eT>
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inline
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void
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op_vecnorm::apply_noalias(Mat<typename get_pod_type<in_eT>::result>& out, const Mat<in_eT>& X, const uword k, const uword dim)
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{
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arma_debug_sigprint();
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typedef typename get_pod_type<in_eT>::result out_eT;
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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if(dim == 0)
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{
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arma_debug_print("op_vecnorm::apply(): dim = 0");
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out.set_size((X_n_rows > 0) ? 1 : 0, X_n_cols);
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if(X_n_rows > 0)
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{
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out_eT* out_mem = out.memptr();
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for(uword col=0; col < X_n_cols; ++col)
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{
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op_vecnorm::apply_rawmem( out_mem[col], X.colptr(col), X_n_rows, k );
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}
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}
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}
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else
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if(dim == 1)
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{
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arma_debug_print("op_vecnorm::apply(): dim = 1");
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out.set_size(X_n_rows, (X_n_cols > 0) ? 1 : 0);
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if(X_n_cols > 0)
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{
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podarray<in_eT> dat(X_n_cols);
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in_eT* dat_mem = dat.memptr();
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out_eT* out_mem = out.memptr();
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for(uword row=0; row < X_n_rows; ++row)
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{
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dat.copy_row(X, row);
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op_vecnorm::apply_rawmem( out_mem[row], dat_mem, X_n_cols, k );
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}
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}
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}
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}
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template<typename in_eT>
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inline
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void
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op_vecnorm::apply_rawmem(typename get_pod_type<in_eT>::result& out_val, const in_eT* mem, const uword N, const uword k)
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{
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arma_debug_sigprint();
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typedef typename get_pod_type<in_eT>::result out_eT;
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const Col<in_eT> tmp(const_cast<in_eT*>(mem), N, false, false);
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const Proxy< Col<in_eT> > P(tmp);
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if(P.get_n_elem() == 0) { out_val = out_eT(0); return; }
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if(k == uword(1)) { out_val = op_norm::vec_norm_1(P); return; }
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if(k == uword(2)) { out_val = op_norm::vec_norm_2(P); return; }
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out_val = op_norm::vec_norm_k(P, int(k));
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}
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//
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template<typename T1>
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inline
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void
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op_vecnorm_ext::apply(Mat<typename T1::pod_type>& out, const mtOp<typename T1::pod_type, T1, op_vecnorm_ext>& in)
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{
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arma_debug_sigprint();
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typedef typename T1::elem_type in_eT;
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typedef typename T1::pod_type out_eT;
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const quasi_unwrap<T1> U(in.m);
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const Mat<in_eT>& X = U.M;
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const uword method_id = in.aux_uword_a;
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const uword dim = in.aux_uword_b;
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arma_conform_check( (method_id == 0), "vecnorm(): unsupported vector norm type" );
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arma_conform_check( (dim > 1), "vecnorm(): parameter 'dim' must be 0 or 1" );
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if(U.is_alias(out))
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{
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Mat<out_eT> tmp;
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op_vecnorm_ext::apply_noalias(tmp, X, method_id, dim);
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out.steal_mem(tmp);
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}
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else
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{
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op_vecnorm_ext::apply_noalias(out, X, method_id, dim);
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}
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}
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template<typename in_eT>
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inline
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void
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op_vecnorm_ext::apply_noalias(Mat<typename get_pod_type<in_eT>::result>& out, const Mat<in_eT>& X, const uword method_id, const uword dim)
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{
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arma_debug_sigprint();
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typedef typename get_pod_type<in_eT>::result out_eT;
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const uword X_n_rows = X.n_rows;
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const uword X_n_cols = X.n_cols;
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if(dim == 0)
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{
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arma_debug_print("op_vecnorm_ext::apply(): dim = 0");
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out.set_size((X_n_rows > 0) ? 1 : 0, X_n_cols);
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if(X_n_rows > 0)
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{
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out_eT* out_mem = out.memptr();
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for(uword col=0; col < X_n_cols; ++col)
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{
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op_vecnorm_ext::apply_rawmem( out_mem[col], X.colptr(col), X_n_rows, method_id );
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}
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}
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}
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else
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if(dim == 1)
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{
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arma_debug_print("op_vecnorm_ext::apply(): dim = 1");
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out.set_size(X_n_rows, (X_n_cols > 0) ? 1 : 0);
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if(X_n_cols > 0)
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{
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podarray<in_eT> dat(X_n_cols);
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in_eT* dat_mem = dat.memptr();
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out_eT* out_mem = out.memptr();
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for(uword row=0; row < X_n_rows; ++row)
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{
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dat.copy_row(X, row);
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op_vecnorm_ext::apply_rawmem( out_mem[row], dat_mem, X_n_cols, method_id );
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}
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}
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}
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}
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template<typename in_eT>
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inline
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void
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op_vecnorm_ext::apply_rawmem(typename get_pod_type<in_eT>::result& out_val, const in_eT* mem, const uword N, const uword method_id)
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{
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arma_debug_sigprint();
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typedef typename get_pod_type<in_eT>::result out_eT;
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const Col<in_eT> tmp(const_cast<in_eT*>(mem), N, false, false);
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const Proxy< Col<in_eT> > P(tmp);
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if(P.get_n_elem() == 0) { out_val = out_eT(0); return; }
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if(method_id == uword(1)) { out_val = op_norm::vec_norm_max(P); return; }
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if(method_id == uword(2)) { out_val = op_norm::vec_norm_min(P); return; }
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out_val = out_eT(0);
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}
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//! @}
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