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Diffstat (limited to 'src/armadillo/include/armadillo_bits/Gen_meat.hpp')
| -rw-r--r-- | src/armadillo/include/armadillo_bits/Gen_meat.hpp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/Gen_meat.hpp b/src/armadillo/include/armadillo_bits/Gen_meat.hpp new file mode 100644 index 0000000..96b8940 --- /dev/null +++ b/src/armadillo/include/armadillo_bits/Gen_meat.hpp @@ -0,0 +1,232 @@ +// SPDX-License-Identifier: Apache-2.0 +// +// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au) +// Copyright 2008-2016 National ICT Australia (NICTA) +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// ------------------------------------------------------------------------ + + +//! \addtogroup Gen +//! @{ + + + +template<typename T1, typename gen_type> +arma_inline +Gen<T1, gen_type>::Gen(const uword in_n_rows, const uword in_n_cols) + : n_rows(in_n_rows) + , n_cols(in_n_cols) + { + arma_extra_debug_sigprint(); + } + + + +template<typename T1, typename gen_type> +arma_inline +Gen<T1, gen_type>::~Gen() + { + arma_extra_debug_sigprint(); + } + + + +template<typename T1, typename gen_type> +arma_inline +typename T1::elem_type +Gen<T1, gen_type>::operator[](const uword ii) const + { + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_zeros>::yes) { return eT(0); } + else if(is_same_type<gen_type, gen_ones >::yes) { return eT(1); } + else if(is_same_type<gen_type, gen_eye >::yes) { return ((ii % n_rows) == (ii / n_rows)) ? eT(1) : eT(0); } + + return eT(0); // prevent pedantic compiler warnings + } + + + +template<typename T1, typename gen_type> +arma_inline +typename T1::elem_type +Gen<T1, gen_type>::at(const uword r, const uword c) const + { + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_zeros>::yes) { return eT(0); } + else if(is_same_type<gen_type, gen_ones >::yes) { return eT(1); } + else if(is_same_type<gen_type, gen_eye >::yes) { return (r == c) ? eT(1) : eT(0); } + + return eT(0); // prevent pedantic compiler warnings + } + + + +template<typename T1, typename gen_type> +arma_inline +typename T1::elem_type +Gen<T1, gen_type>::at_alt(const uword ii) const + { + return operator[](ii); + } + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply(Mat<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + // NOTE: we're assuming that the matrix has already been set to the correct size; + // this is done by either the Mat contructor or operator=() + + if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); } + else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); } + else if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); } + } + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply_inplace_plus(Mat<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "addition"); + + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_ones>::yes) + { + arrayops::inplace_plus(out.memptr(), eT(1), out.n_elem); + } + else + if(is_same_type<gen_type, gen_eye>::yes) + { + const uword N = (std::min)(n_rows, n_cols); + + for(uword ii=0; ii < N; ++ii) { out.at(ii,ii) += eT(1); } + } + } + + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply_inplace_minus(Mat<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "subtraction"); + + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_ones>::yes) + { + arrayops::inplace_minus(out.memptr(), eT(1), out.n_elem); + } + else + if(is_same_type<gen_type, gen_eye>::yes) + { + const uword N = (std::min)(n_rows, n_cols); + + for(uword ii=0; ii < N; ++ii) { out.at(ii,ii) -= eT(1); } + } + } + + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply_inplace_schur(Mat<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise multiplication"); + + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_zeros>::yes) + { + arrayops::inplace_mul(out.memptr(), eT(0), out.n_elem); + // NOTE: not using arrayops::fill_zeros(), as 'out' may have NaN elements + } + else + if(is_same_type<gen_type, gen_eye>::yes) + { + for(uword c=0; c < n_cols; ++c) + for(uword r=0; r < n_rows; ++r) + { + if(r != c) { out.at(r,c) *= eT(0); } + } + } + } + + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply_inplace_div(Mat<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise division"); + + typedef typename T1::elem_type eT; + + if(is_same_type<gen_type, gen_zeros>::yes) + { + arrayops::inplace_div(out.memptr(), eT(0), out.n_elem); + } + else + if(is_same_type<gen_type, gen_eye>::yes) + { + for(uword c=0; c < n_cols; ++c) + for(uword r=0; r < n_rows; ++r) + { + if(r != c) { out.at(r,c) /= eT(0); } + } + } + } + + + +template<typename T1, typename gen_type> +inline +void +Gen<T1, gen_type>::apply(subview<typename T1::elem_type>& out) const + { + arma_extra_debug_sigprint(); + + // NOTE: we're assuming that the submatrix has the same dimensions as the Gen object + // this is checked by subview::operator=() + + if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); } + else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); } + else if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); } + } + + + +//! @} |