342 lines
6.7 KiB
C++
342 lines
6.7 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_flip
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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_flipud::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_flipud>& in)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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if(is_Mat<T1>::value)
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{
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// allow detection of in-place operation
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const unwrap<T1> U(in.m);
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op_flipud::apply_direct(out, U.M);
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}
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else
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{
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const Proxy<T1> P(in.m);
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if(P.is_alias(out))
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{
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Mat<eT> tmp;
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op_flipud::apply_proxy_noalias(tmp, P);
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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_flipud::apply_proxy_noalias(out, P);
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}
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}
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}
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template<typename eT>
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inline
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void
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op_flipud::apply_direct(Mat<eT>& out, const Mat<eT>& X)
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{
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arma_extra_debug_sigprint();
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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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const uword X_n_rows_m1 = X_n_rows - 1;
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if(&out != &X)
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{
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out.set_size(X_n_rows, X_n_cols);
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if(X_n_cols == 1)
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{
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const eT* X_mem = X.memptr();
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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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out_mem[X_n_rows_m1 - row] = X_mem[row];
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}
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}
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else
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{
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for(uword col=0; col < X_n_cols; ++col)
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{
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const eT* X_colmem = X.colptr(col);
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eT* out_colmem = out.colptr(col);
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for(uword row=0; row < X_n_rows; ++row)
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{
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out_colmem[X_n_rows_m1 - row] = X_colmem[row];
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}
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}
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}
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}
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else // in-place operation
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{
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const uword N = X_n_rows / 2;
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if(X_n_cols == 1)
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{
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eT* out_mem = out.memptr();
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for(uword row=0; row < N; ++row)
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{
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std::swap(out_mem[X_n_rows_m1 - row], out_mem[row]);
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}
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}
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else
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{
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for(uword col=0; col < X_n_cols; ++col)
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{
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eT* out_colmem = out.colptr(col);
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for(uword row=0; row < N; ++row)
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{
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std::swap(out_colmem[X_n_rows_m1 - row], out_colmem[row]);
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}
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}
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}
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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_flipud::apply_proxy_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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typedef typename Proxy<T1>::stored_type P_stored_type;
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if(is_Mat<P_stored_type>::value)
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{
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const unwrap<P_stored_type> U(P.Q);
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op_flipud::apply_direct(out, U.M);
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return;
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}
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const uword P_n_rows = P.get_n_rows();
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const uword P_n_cols = P.get_n_cols();
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const uword P_n_rows_m1 = P_n_rows - 1;
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out.set_size(P_n_rows, P_n_cols);
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if( ((T1::is_col) || (P_n_cols == 1)) && (Proxy<T1>::use_at == false) )
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{
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eT* out_mem = out.memptr();
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const typename Proxy<T1>::ea_type P_ea = P.get_ea();
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for(uword row=0; row < P_n_rows; ++row)
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{
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out_mem[P_n_rows_m1 - row] = P_ea[row];
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}
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}
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else
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{
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for(uword col=0; col < P_n_cols; ++col)
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{
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eT* out_colmem = out.colptr(col);
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for(uword row=0; row < P_n_rows; ++row)
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{
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out_colmem[P_n_rows_m1 - row] = P.at(row, col);
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}
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}
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}
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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_fliplr::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_fliplr>& in)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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if(is_Mat<T1>::value)
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{
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// allow detection of in-place operation
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const unwrap<T1> U(in.m);
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op_fliplr::apply_direct(out, U.M);
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}
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else
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{
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const Proxy<T1> P(in.m);
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if(P.is_alias(out))
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{
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Mat<eT> tmp;
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op_fliplr::apply_proxy_noalias(tmp, P);
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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_fliplr::apply_proxy_noalias(out, P);
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}
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}
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}
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template<typename eT>
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inline
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void
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op_fliplr::apply_direct(Mat<eT>& out, const Mat<eT>& X)
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{
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arma_extra_debug_sigprint();
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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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const uword X_n_cols_m1 = X_n_cols - 1;
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if(&out != &X)
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{
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out.set_size(X_n_rows, X_n_cols);
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if(X_n_rows == 1)
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{
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const eT* X_mem = X.memptr();
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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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out_mem[X_n_cols_m1 - col] = X_mem[col];
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}
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}
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else
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{
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for(uword col=0; col < X_n_cols; ++col)
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{
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out.col(X_n_cols_m1 - col) = X.col(col);
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}
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}
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}
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else // in-place operation
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{
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const uword N = X_n_cols / 2;
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if(X_n_rows == 1)
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{
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eT* out_mem = out.memptr();
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for(uword col=0; col < N; ++col)
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{
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std::swap(out_mem[X_n_cols_m1 - col], out_mem[col]);
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}
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}
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else
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{
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for(uword col=0; col < N; ++col)
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{
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out.swap_cols(X_n_cols_m1 - col, col);
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}
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}
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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_fliplr::apply_proxy_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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typedef typename Proxy<T1>::stored_type P_stored_type;
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if(is_Mat<P_stored_type>::value)
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{
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const unwrap<P_stored_type> U(P.Q);
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op_fliplr::apply_direct(out, U.M);
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return;
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}
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const uword P_n_rows = P.get_n_rows();
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const uword P_n_cols = P.get_n_cols();
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const uword P_n_cols_m1 = P_n_cols - 1;
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out.set_size(P_n_rows, P_n_cols);
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if( ((T1::is_row) || (P_n_rows == 1)) && (Proxy<T1>::use_at == false) )
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{
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eT* out_mem = out.memptr();
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const typename Proxy<T1>::ea_type P_ea = P.get_ea();
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for(uword col=0; col < P_n_cols; ++col)
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{
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out_mem[P_n_cols_m1 - col] = P_ea[col];
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}
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}
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else
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{
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for(uword col=0; col < P_n_cols; ++col)
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{
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eT* out_colmem = out.colptr(P_n_cols_m1 - col);
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for(uword row=0; row < P_n_rows; ++row)
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{
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out_colmem[row] = P.at(row,col);
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}
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}
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}
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}
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//! @}
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