// 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_expmat
//! @{

template <typename T1>
arma_warn_unused inline typename enable_if2<is_real<typename T1::pod_type>::value,
                                            const Op<T1, op_expmat> >::result
expmat(const Base<typename T1::elem_type, T1>& A) {
  arma_extra_debug_sigprint();

  return Op<T1, op_expmat>(A.get_ref());
}

template <typename T1>
inline typename enable_if2<is_real<typename T1::pod_type>::value, bool>::result expmat(
    Mat<typename T1::elem_type>& B, const Base<typename T1::elem_type, T1>& A) {
  arma_extra_debug_sigprint();

  const bool status = op_expmat::apply_direct(B, A);

  if (status == false) {
    B.soft_reset();
    arma_debug_warn_level(3, "expmat(): given matrix appears ill-conditioned");
  }

  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_expmat_sym> >::result
    expmat_sym(const Base<typename T1::elem_type, T1>& X) {
  arma_extra_debug_sigprint();

  return Op<T1, op_expmat_sym>(X.get_ref());
}

template <typename T1>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
expmat_sym(Mat<typename T1::elem_type>& Y, const Base<typename T1::elem_type, T1>& X) {
  arma_extra_debug_sigprint();

  const bool status = op_expmat_sym::apply_direct(Y, X.get_ref());

  if (status == false) {
    Y.soft_reset();
    arma_debug_warn_level(3, "expmat_sym(): transformation failed");
  }

  return status;
}

//! @}
