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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_inv_sympd
//! @{
template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, const Op<T1, op_inv_spd_default> >::result
inv_sympd
(
const Base<typename T1::elem_type, T1>& X
)
{
arma_extra_debug_sigprint();
return Op<T1, op_inv_spd_default>(X.get_ref());
}
template<typename T1>
inline
typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, bool >::result
inv_sympd
(
Mat<typename T1::elem_type>& out,
const Base<typename T1::elem_type,T1>& X
)
{
arma_extra_debug_sigprint();
const bool status = op_inv_spd_default::apply_direct(out, X.get_ref());
if(status == false)
{
out.soft_reset();
arma_debug_warn_level(3, "inv_sympd(): matrix is singular or not positive definite");
}
return status;
}
template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, const Op<T1, op_inv_spd_full> >::result
inv_sympd
(
const Base<typename T1::elem_type, T1>& X,
const inv_opts::opts& opts
)
{
arma_extra_debug_sigprint();
return Op<T1, op_inv_spd_full>(X.get_ref(), opts.flags, uword(0));
}
template<typename T1>
inline
typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, bool >::result
inv_sympd
(
Mat<typename T1::elem_type>& out,
const Base<typename T1::elem_type,T1>& X,
const inv_opts::opts& opts
)
{
arma_extra_debug_sigprint();
const bool status = op_inv_spd_full::apply_direct(out, X.get_ref(), opts.flags);
if(status == false)
{
out.soft_reset();
arma_debug_warn_level(3, "inv_sympd(): matrix is singular or not positive definite");
}
return status;
}
template<typename T1>
inline
typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, bool >::result
inv_sympd
(
Mat<typename T1::elem_type>& out_inv,
typename T1::pod_type& out_rcond,
const Base<typename T1::elem_type,T1>& X
)
{
arma_extra_debug_sigprint();
typedef typename T1::pod_type T;
op_inv_spd_state<T> inv_state;
const bool status = op_inv_spd_rcond::apply_direct(out_inv, inv_state, X.get_ref());
out_rcond = inv_state.rcond;
if(status == false)
{
out_rcond = T(0);
out_inv.soft_reset();
arma_debug_warn_level(3, "inv_sympd(): matrix is singular or not positive definite");
}
return status;
}
//! @}
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