109 lines
2.3 KiB
C++
109 lines
2.3 KiB
C++
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// Copyright (C) 2010-2015 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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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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const unwrap<T1> tmp(in.m);
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const Mat<eT>& X = tmp.M;
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const uword X_n_rows = T1::is_row ? uword(1) : X.n_rows;
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const uword X_n_cols = T1::is_col ? uword(1) : X.n_cols;
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if(&out != &X)
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{
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out.copy_size(X);
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for(uword col=0; col<X_n_cols; ++col)
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{
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const eT* X_data = X.colptr(col);
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eT* out_data = 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_data[row] = X_data[X_n_rows-1 - row];
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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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for(uword col=0; col<X_n_cols; ++col)
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{
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eT* out_data = 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_data[row], out_data[X_n_rows-1 - row]);
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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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const unwrap<T1> tmp(in.m);
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const Mat<eT>& X = tmp.M;
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const uword X_n_cols = X.n_cols;
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if(&out != &X)
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{
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out.copy_size(X);
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if(T1::is_row || X.is_rowvec())
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{
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for(uword i=0; i<X_n_cols; ++i) { out[i] = X[X_n_cols-1 - i]; }
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}
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else
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{
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for(uword i=0; i<X_n_cols; ++i) { out.col(i) = X.col(X_n_cols-1 - i); }
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}
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}
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else
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{
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const uword N = X_n_cols / 2;
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if(T1::is_row || X.is_rowvec())
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{
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for(uword i=0; i<N; ++i) { std::swap(out[i], out[X_n_cols-1 - i]); }
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}
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else
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{
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for(uword i=0; i<N; ++i) { out.swap_cols(i, X_n_cols-1 - i); }
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}
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}
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}
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//! @}
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