118 lines
2.9 KiB
C++
118 lines
2.9 KiB
C++
// Copyright (C) 2009-2015 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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// Written by Dimitrios Bouzas
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//! \addtogroup op_repmat
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//! @{
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template<typename obj>
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inline
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void
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op_repmat::apply_noalias(Mat<typename obj::elem_type>& out, const obj& X, const uword copies_per_row, const uword copies_per_col)
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{
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arma_extra_debug_sigprint();
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typedef typename obj::elem_type eT;
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const uword X_n_rows = obj::is_row ? uword(1) : X.n_rows;
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const uword X_n_cols = obj::is_col ? uword(1) : X.n_cols;
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out.set_size(X_n_rows * copies_per_row, X_n_cols * copies_per_col);
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const uword out_n_rows = out.n_rows;
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const uword out_n_cols = out.n_cols;
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// if( (out_n_rows > 0) && (out_n_cols > 0) )
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// {
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// for(uword col = 0; col < out_n_cols; col += X_n_cols)
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// for(uword row = 0; row < out_n_rows; row += X_n_rows)
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// {
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// out.submat(row, col, row+X_n_rows-1, col+X_n_cols-1) = X;
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// }
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// }
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if( (out_n_rows > 0) && (out_n_cols > 0) )
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{
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if(copies_per_row != 1)
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{
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for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
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{
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const uword out_col_offset = X_n_cols * col_copy;
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for(uword col=0; col < X_n_cols; ++col)
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{
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eT* out_colptr = out.colptr(col + out_col_offset);
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const eT* X_colptr = X.colptr(col);
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for(uword row_copy=0; row_copy < copies_per_row; ++row_copy)
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{
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const uword out_row_offset = X_n_rows * row_copy;
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arrayops::copy( &out_colptr[out_row_offset], X_colptr, X_n_rows );
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}
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}
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}
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}
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else
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{
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for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
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{
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const uword out_col_offset = X_n_cols * col_copy;
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for(uword col=0; col < X_n_cols; ++col)
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{
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eT* out_colptr = out.colptr(col + out_col_offset);
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const eT* X_colptr = X.colptr(col);
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arrayops::copy( out_colptr, X_colptr, X_n_rows );
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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_repmat::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_repmat>& 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 uword copies_per_row = in.aux_uword_a;
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const uword copies_per_col = in.aux_uword_b;
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const quasi_unwrap<T1> U(in.m);
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if(U.is_alias(out))
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{
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Mat<eT> tmp;
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op_repmat::apply_noalias(tmp, U.M, copies_per_row, copies_per_col);
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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_repmat::apply_noalias(out, U.M, copies_per_row, copies_per_col);
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}
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}
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//! @}
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