152 lines
2.7 KiB
C++
152 lines
2.7 KiB
C++
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// Copyright (C) 2012-2014 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 Ryan Curtin
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//! \addtogroup spop_strans
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//! @{
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template<typename eT>
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arma_hot
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inline
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void
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spop_strans::apply_spmat(SpMat<eT>& out, const SpMat<eT>& X)
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{
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arma_extra_debug_sigprint();
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typedef typename umat::elem_type ueT;
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const uword N = X.n_nonzero;
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if(N == uword(0))
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{
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out.zeros(X.n_cols, X.n_rows);
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return;
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}
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umat locs(2, N);
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typename SpMat<eT>::const_iterator it = X.begin();
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for(uword count = 0; count < N; ++count)
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{
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ueT* locs_ptr = locs.colptr(count);
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locs_ptr[0] = it.col();
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locs_ptr[1] = it.row();
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++it;
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}
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const Col<eT> vals(const_cast<eT*>(X.values), N, false);
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SpMat<eT> tmp(locs, vals, X.n_cols, X.n_rows);
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out.steal_mem(tmp);
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}
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template<typename T1>
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arma_hot
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inline
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void
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spop_strans::apply_proxy(SpMat<typename T1::elem_type>& out, const T1& X)
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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 umat::elem_type ueT;
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const SpProxy<T1> p(X);
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const uword N = p.get_n_nonzero();
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if(N == uword(0))
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{
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out.zeros(p.get_n_cols(), p.get_n_rows());
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return;
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}
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umat locs(2, N);
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Col<eT> vals(N);
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eT* vals_ptr = vals.memptr();
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typename SpProxy<T1>::const_iterator_type it = p.begin();
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for(uword count = 0; count < N; ++count)
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{
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ueT* locs_ptr = locs.colptr(count);
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locs_ptr[0] = it.col();
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locs_ptr[1] = it.row();
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vals_ptr[count] = (*it);
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++it;
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}
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SpMat<eT> tmp(locs, vals, p.get_n_cols(), p.get_n_rows());
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out.steal_mem(tmp);
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}
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template<typename T1>
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arma_hot
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inline
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void
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spop_strans::apply(SpMat<typename T1::elem_type>& out, const SpOp<T1,spop_strans>& in)
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{
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arma_extra_debug_sigprint();
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if(is_SpMat<T1>::value)
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{
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const unwrap_spmat<T1> tmp(in.m);
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spop_strans::apply_spmat(out, tmp.M);
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}
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else
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{
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spop_strans::apply_proxy(out, in.m);
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}
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}
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//! for transpose of non-complex matrices, redirected from spop_htrans::apply()
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template<typename T1>
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arma_hot
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inline
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void
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spop_strans::apply(SpMat<typename T1::elem_type>& out, const SpOp<T1,spop_htrans>& in)
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{
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arma_extra_debug_sigprint();
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if(is_SpMat<T1>::value)
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{
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const unwrap_spmat<T1> tmp(in.m);
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spop_strans::apply_spmat(out, tmp.M);
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}
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else
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{
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spop_strans::apply_proxy(out, in.m);
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}
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}
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//! @}
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