233 lines
5.8 KiB
C++
233 lines
5.8 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 Gen
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//! @{
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template<typename T1, typename gen_type>
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arma_inline
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Gen<T1, gen_type>::Gen(const uword in_n_rows, const uword in_n_cols)
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: n_rows(in_n_rows)
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, n_cols(in_n_cols)
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{
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arma_extra_debug_sigprint();
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}
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template<typename T1, typename gen_type>
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arma_inline
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Gen<T1, gen_type>::~Gen()
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{
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arma_extra_debug_sigprint();
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::operator[](const uword ii) const
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{
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_zeros>::yes) { return eT(0); }
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else if(is_same_type<gen_type, gen_ones >::yes) { return eT(1); }
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else if(is_same_type<gen_type, gen_eye >::yes) { return ((ii % n_rows) == (ii / n_rows)) ? eT(1) : eT(0); }
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return eT(0); // prevent pedantic compiler warnings
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::at(const uword r, const uword c) const
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{
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_zeros>::yes) { return eT(0); }
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else if(is_same_type<gen_type, gen_ones >::yes) { return eT(1); }
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else if(is_same_type<gen_type, gen_eye >::yes) { return (r == c) ? eT(1) : eT(0); }
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return eT(0); // prevent pedantic compiler warnings
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::at_alt(const uword ii) const
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{
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return operator[](ii);
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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// NOTE: we're assuming that the matrix has already been set to the correct size;
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// this is done by either the Mat contructor or operator=()
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if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); }
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else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); }
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else if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); }
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_plus(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "addition");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_ones>::yes)
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{
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arrayops::inplace_plus(out.memptr(), eT(1), out.n_elem);
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}
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else
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword ii=0; ii < N; ++ii) { out.at(ii,ii) += eT(1); }
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_minus(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "subtraction");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_ones>::yes)
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{
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arrayops::inplace_minus(out.memptr(), eT(1), out.n_elem);
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}
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else
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword ii=0; ii < N; ++ii) { out.at(ii,ii) -= eT(1); }
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_schur(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise multiplication");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_zeros>::yes)
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{
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arrayops::inplace_mul(out.memptr(), eT(0), out.n_elem);
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// NOTE: not using arrayops::fill_zeros(), as 'out' may have NaN elements
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}
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else
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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for(uword c=0; c < n_cols; ++c)
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for(uword r=0; r < n_rows; ++r)
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{
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if(r != c) { out.at(r,c) *= eT(0); }
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_div(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise division");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_zeros>::yes)
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{
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arrayops::inplace_div(out.memptr(), eT(0), out.n_elem);
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}
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else
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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for(uword c=0; c < n_cols; ++c)
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for(uword r=0; r < n_rows; ++r)
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{
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if(r != c) { out.at(r,c) /= eT(0); }
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply(subview<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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// NOTE: we're assuming that the submatrix has the same dimensions as the Gen object
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// this is checked by subview::operator=()
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if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); }
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else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); }
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else if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); }
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}
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//! @}
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