// 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_trunc_exp
//! @{



template<typename eT>
arma_warn_unused
inline
static
typename arma_real_only<eT>::result
trunc_exp(const eT x)
  {
  if(std::numeric_limits<eT>::is_iec559 && (x >= Datum<eT>::log_max ))
    {
    return std::numeric_limits<eT>::max();
    }
  else
    {
    return std::exp(x);
    }
  }



template<typename eT>
arma_warn_unused
inline
static
typename arma_integral_only<eT>::result
trunc_exp(const eT x)
  {
  return eT( trunc_exp( double(x) ) );
  }



template<typename T>
arma_warn_unused
inline
static
std::complex<T>
trunc_exp(const std::complex<T>& x)
  {
  return std::polar( trunc_exp( x.real() ), x.imag() );
  }



template<typename T1>
arma_warn_unused
arma_inline
typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_trunc_exp> >::result
trunc_exp(const T1& A)
  {
  arma_debug_sigprint();
  
  return eOp<T1, eop_trunc_exp>(A);
  }



template<typename T1>
arma_warn_unused
arma_inline
const eOpCube<T1, eop_trunc_exp>
trunc_exp(const BaseCube<typename T1::elem_type,T1>& A)
  {
  arma_debug_sigprint();
  
  return eOpCube<T1, eop_trunc_exp>(A.get_ref());
  }



//! @}
