// SPDX-License-Identifier: Apache-2.0
// 
// Copyright 2008-2016 Conrad Sanderson (https://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
// https://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_sqrtmat
//! @{



template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< (is_blas_type<typename T1::elem_type>::value && is_cx<typename T1::elem_type>::no), const mtOp<std::complex<typename T1::elem_type>, T1, op_sqrtmat> >::result
sqrtmat(const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  return mtOp<std::complex<typename T1::elem_type>, T1, op_sqrtmat>(X.get_ref());
  }



template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< (is_blas_type<typename T1::elem_type>::value && is_cx<typename T1::elem_type>::yes), const Op<T1, op_sqrtmat_cx> >::result
sqrtmat(const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  return Op<T1, op_sqrtmat_cx>(X.get_ref());
  }



template<typename T1>
inline
typename enable_if2< (is_blas_type<typename T1::elem_type>::value && is_cx<typename T1::elem_type>::no), bool >::result
sqrtmat(Mat< std::complex<typename T1::elem_type> >& Y, const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  const bool status = op_sqrtmat::apply_direct(Y, X.get_ref());
  
  if(status == false)
    {
    arma_warn(3, "sqrtmat(): given matrix is singular; may not have a square root");
    }
  
  return status;
  }



template<typename T1>
inline
typename enable_if2< (is_blas_type<typename T1::elem_type>::value && is_cx<typename T1::elem_type>::yes), bool >::result
sqrtmat(Mat<typename T1::elem_type>& Y, const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  const bool status = op_sqrtmat_cx::apply_direct(Y, X.get_ref());
  
  if(status == false)
    {
    arma_warn(3, "sqrtmat(): given matrix is singular; may not have a square root");
    }
  
  return status;
  }



//



template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< is_blas_type<typename T1::elem_type>::value, const Op<T1, op_sqrtmat_sympd> >::result
sqrtmat_sympd(const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  return Op<T1, op_sqrtmat_sympd>(X.get_ref());
  }



template<typename T1>
inline
typename enable_if2< is_blas_type<typename T1::elem_type>::value, bool >::result
sqrtmat_sympd(Mat<typename T1::elem_type>& Y, const Base<typename T1::elem_type,T1>& X)
  {
  arma_debug_sigprint();
  
  const bool status = op_sqrtmat_sympd::apply_direct(Y, X.get_ref());
  
  if(status == false)
    {
    Y.soft_reset();
    arma_warn(3, "sqrtmat_sympd(): transformation failed");
    }
  
  return status;
  }



//! @}
