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// 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 fn_schur
//! @{
template<typename T1>
inline
bool
schur
(
Mat<typename T1::elem_type>& S,
const Base<typename T1::elem_type,T1>& X,
const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
typedef typename T1::elem_type eT;
Mat<eT> U;
const bool status = auxlib::schur(U, S, X.get_ref(), false);
if(status == false)
{
S.soft_reset();
arma_debug_warn_level(3, "schur(): decomposition failed");
}
return status;
}
template<typename T1>
arma_warn_unused
inline
Mat<typename T1::elem_type>
schur
(
const Base<typename T1::elem_type,T1>& X,
const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
typedef typename T1::elem_type eT;
Mat<eT> S;
Mat<eT> U;
const bool status = auxlib::schur(U, S, X.get_ref(), false);
if(status == false)
{
S.soft_reset();
arma_stop_runtime_error("schur(): decomposition failed");
}
return S;
}
template<typename T1>
inline
bool
schur
(
Mat<typename T1::elem_type>& U,
Mat<typename T1::elem_type>& S,
const Base<typename T1::elem_type,T1>& X,
const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
arma_debug_check( void_ptr(&U) == void_ptr(&S), "schur(): 'U' is an alias of 'S'" );
const bool status = auxlib::schur(U, S, X.get_ref(), true);
if(status == false)
{
U.soft_reset();
S.soft_reset();
arma_debug_warn_level(3, "schur(): decomposition failed");
}
return status;
}
//! @}
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