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dumper_padding_helper.hh
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Tue, Nov 12, 10:18

dumper_padding_helper.hh
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/**
* @file dumper_padding_helper.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue Sep 02 2014
* @date last modification: Sun Oct 19 2014
*
* @brief Padding helper for field iterators
*
* @section LICENSE
*
* Copyright (©) 2014, 2015 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __AKANTU_DUMPER_PADDING_HELPER_HH__
#define __AKANTU_DUMPER_PADDING_HELPER_HH__
/* -------------------------------------------------------------------------- */
#include "dumper_compute.hh"
/* -------------------------------------------------------------------------- */
namespace akantu {
__BEGIN_AKANTU_DUMPER__
/* -------------------------------------------------------------------------- */
class PadderInterface {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
PadderInterface(){
padding_m = 0;
padding_n = 0;
}
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
void setPadding(UInt m, UInt n = 0){
padding_m = m;
padding_n = n;
}
virtual UInt getPaddedDim(UInt nb_data) {
return nb_data;
}
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
public:
/// padding informations
UInt padding_n, padding_m;
};
/* -------------------------------------------------------------------------- */
template<class input_type, class output_type>
class PadderGeneric :
public ComputeFunctor<input_type, output_type > , public PadderInterface {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
PadderGeneric() : PadderInterface(){}
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
inline output_type pad(const input_type & in,__attribute__((unused)) UInt nb_data) {
return in; // trick due to the fact that IOHelper padds the vectors (avoid a copy of data)
}
};
/* -------------------------------------------------------------------------- */
template<class T>
class PadderGeneric<Vector<T>, Matrix<T> > :
public ComputeFunctor<Vector<T>, Matrix<T> > , public PadderInterface {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
inline Matrix<T> pad(const Vector<T> & _in,
UInt nrows, UInt ncols,
UInt nb_data) {
Matrix<T> in(_in.storage(), nrows, ncols);
if(padding_m <= nrows && padding_n*nb_data <= ncols)
return in;
else {
Matrix<T> ret(padding_m, padding_n * nb_data);
UInt nb_cols_per_data = in.cols() / nb_data;
for (UInt d = 0; d < nb_data; ++d)
for (UInt i = 0; i < in.rows(); ++i)
for (UInt j = 0; j < nb_cols_per_data; ++j)
ret(i, j + d * padding_n) = in(i, j + d * nb_cols_per_data);
return ret;
}
}
};
/* -------------------------------------------------------------------------- */
} // akantu
__END_AKANTU_DUMPER__
#endif /* __AKANTU_DUMPER_PADDING_HELPER_HH__ */

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