// 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_det
//! @{

template <typename T1>
arma_warn_unused inline
    typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                        typename T1::elem_type>::result
    det(const Base<typename T1::elem_type, T1>& X) {
  arma_debug_sigprint();

  typedef typename T1::elem_type eT;

  eT out_val = eT(0);

  const bool status = op_det::apply_direct(out_val, X.get_ref());

  if (status == false) {
    out_val = eT(0);
    arma_stop_runtime_error("det(): failed to find determinant");
  }

  return out_val;
}

template <typename T1>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
det(typename T1::elem_type& out_val, const Base<typename T1::elem_type, T1>& X) {
  arma_debug_sigprint();

  typedef typename T1::elem_type eT;

  const bool status = op_det::apply_direct(out_val, X.get_ref());

  if (status == false) {
    out_val = eT(0);
    arma_warn(3, "det(): failed to find determinant");
  }

  return status;
}

template <typename T>
arma_warn_unused arma_inline typename arma_scalar_only<T>::result det(const T& x) {
  return x;
}

//! @}
