/*************************************************************************************

    Grid physics library, www.github.com/paboyle/Grid 

    Source file: ./lib/tensors/Tensor_unary.h

    Copyright (C) 2015

Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: paboyle <paboyle@ph.ed.ac.uk>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/*  END LEGAL */
#ifndef GRID_TENSOR_UNARY_H
#define GRID_TENSOR_UNARY_H

NAMESPACE_BEGIN(Grid);

#define UNARY(func)							\
  template<class obj> accelerator_inline auto func(const iScalar<obj> &z) -> iScalar<obj> \
  {									\
    iScalar<obj> ret;							\
    ret._internal = func( (z._internal));				\
    return ret;								\
  }									\
  template<class obj,int N> accelerator_inline auto func(const iVector<obj,N> &z) -> iVector<obj,N>	\
  {									\
    iVector<obj,N> ret;							\
    for(int c1=0;c1<N;c1++){						\
      ret._internal[c1] = func( (z._internal[c1]));			\
    }									\
    return ret;								\
  }									\
  template<class obj,int N> accelerator_inline auto func(const iMatrix<obj,N> &z) -> iMatrix<obj,N>	\
  {									\
    iMatrix<obj,N> ret;							\
    for(int c1=0;c1<N;c1++){						\
      for(int c2=0;c2<N;c2++){						\
	ret._internal[c1][c2] = func( (z._internal[c1][c2]));		\
      }}								\
    return ret;								\
  }


#define BINARY_RSCALAR(func,scal)					\
  template<class obj> accelerator_inline iScalar<obj> func(const iScalar<obj> &z,scal y) \
  {									\
    iScalar<obj> ret;							\
    ret._internal = func(z._internal,y);				\
    return ret;								\
  }									\
  template<class obj,int N> accelerator_inline iVector<obj,N> func(const iVector<obj,N> &z,scal y) \
  {									\
    iVector<obj,N> ret;							\
    for(int c1=0;c1<N;c1++){						\
      ret._internal[c1] = func(z._internal[c1],y);			\
    }									\
    return ret;								\
  }									\
  template<class obj,int N> accelerator_inline  iMatrix<obj,N> func(const iMatrix<obj,N> &z, scal y) \
  {									\
    iMatrix<obj,N> ret;							\
    for(int c1=0;c1<N;c1++){						\
      for(int c2=0;c2<N;c2++){						\
	ret._internal[c1][c2] = func(z._internal[c1][c2],y);		\
      }}								\
    return ret;								\
  }

UNARY(sqrt);
UNARY(rsqrt);
UNARY(sin);
UNARY(cos);
UNARY(asin);
UNARY(acos);
UNARY(log);
UNARY(exp);
UNARY(abs);
UNARY(Not);


template<class obj> accelerator_inline auto toReal(const iScalar<obj> &z) -> typename iScalar<obj>::Realified
{
  typename iScalar<obj>::Realified ret;
  ret._internal = toReal(z._internal);
  return ret;
}
template<class obj,int N> accelerator_inline auto toReal(const iVector<obj,N> &z) -> typename iVector<obj,N>::Realified
{
  typename iVector<obj,N>::Realified ret;
  for(int c1=0;c1<N;c1++){  
    ret._internal[c1] = toReal(z._internal[c1]); 
  }
  return ret;
}
template<class obj,int N> accelerator_inline auto toReal(const iMatrix<obj,N> &z) -> typename iMatrix<obj,N>::Realified
{
  typename iMatrix<obj,N>::Realified ret;
  for(int c1=0;c1<N;c1++){
    for(int c2=0;c2<N;c2++){
      ret._internal[c1][c2] = toReal(z._internal[c1][c2]);
    }}
  return ret;
}

template<class obj> accelerator_inline auto toComplex(const iScalar<obj> &z) -> typename iScalar<obj>::Complexified
{
  typename iScalar<obj>::Complexified ret;
  ret._internal = toComplex(z._internal);
  return ret;
}
template<class obj,int N> accelerator_inline auto toComplex(const iVector<obj,N> &z) -> typename iVector<obj,N>::Complexified
{
  typename iVector<obj,N>::Complexified ret;
  for(int c1=0;c1<N;c1++){  
    ret._internal[c1] = toComplex(z._internal[c1]); 
  }
  return ret;
}
template<class obj,int N> accelerator_inline auto toComplex(const iMatrix<obj,N> &z) -> typename iMatrix<obj,N>::Complexified
{
  typename iMatrix<obj,N>::Complexified ret;
  for(int c1=0;c1<N;c1++){
    for(int c2=0;c2<N;c2++){
      ret._internal[c1][c2] = toComplex(z._internal[c1][c2]);
    }}
  return ret;
}

BINARY_RSCALAR(div,Integer);
BINARY_RSCALAR(mod,Integer);
BINARY_RSCALAR(pow,RealD);

#undef UNARY
#undef BINARY_RSCALAR

NAMESPACE_END(Grid);

#endif