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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_qz
//! @{
//! QZ decomposition for pair of N-by-N general matrices A and B
template<typename T1, typename T2>
inline
typename
enable_if2
<
is_supported_blas_type<typename T1::elem_type>::value,
bool
>::result
qz
(
Mat<typename T1::elem_type>& AA,
Mat<typename T1::elem_type>& BB,
Mat<typename T1::elem_type>& Q,
Mat<typename T1::elem_type>& Z,
const Base<typename T1::elem_type,T1>& A_expr,
const Base<typename T1::elem_type,T2>& B_expr,
const char* select = "none"
)
{
arma_extra_debug_sigprint();
const char sig = (select != nullptr) ? select[0] : char(0);
arma_debug_check( ( (sig != 'n') && (sig != 'l') && (sig != 'r') && (sig != 'i') && (sig != 'o') ), "qz(): unknown select form" );
const bool status = auxlib::qz(AA, BB, Q, Z, A_expr.get_ref(), B_expr.get_ref(), sig);
if(status == false)
{
AA.soft_reset();
BB.soft_reset();
Q.soft_reset();
Z.soft_reset();
arma_debug_warn_level(3, "qz(): decomposition failed");
}
return status;
}
//! @}
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