text: /*
  Saves results from parallel game of life program.
  
  Copyright 2014, 2015, 2016 Ilja Honkonen
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without modification,
  are permitted provided that the following conditions are met:
  
  * Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.
  
  * Redistributions in binary form must reproduce the above copyright notice, this
    list of conditions and the following disclaimer in the documentation and/or
    other materials provided with the distribution.
  
  * Neither the name of copyright holders nor the names of their contributors
    may be used to endorse or promote products derived from this software
    without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  
  #ifndef GOL_SAVE_HPP
  #define GOL_SAVE_HPP
  
  #include "cstdlib"
  #include "iomanip"
  #include "iostream"
  #include "mpi.h"
  #include "sstream"
  #include "string"
  #include "tuple"
  
  #include "dccrg.hpp"
  #include "dccrg_cartesian_geometry.hpp"
  
  #include "gensimcell.hpp"
  
  //! see ../serial.cpp for the basics
  
  namespace gol {
  
  /*!
  Saves the game in given grid into a file with name derived from given time. 
  
  The variable Is_Alive_T is used to refer to the actual data to be saved.
  Assumes that the transfer of all variables
  had been disabled before this function was called. 
  */
  template<
  	class Cell_T,
  	class Is_Alive_T
  > void save(
  	dccrg::Dccrg<Cell_T, dccrg::Cartesian_Geometry>& grid,
  	const double simulation_time
  ) {
  	// only save the life state of cells
  	Cell_T::set_transfer_all(true, Is_Alive_T());
  
  	// get the file name
  	std::ostringstream time_string;
  	time_string
  		<< std::setw(4)
  		<< std::setfill('0')
  		<< size_t(simulation_time * 1000);
  
  	// use an empty header with a sane address
  	char dummy;
  	std::tuple<void*, int, MPI_Datatype> header{(void*) &dummy, 0, MPI_BYTE};
  
  	grid.save_grid_data(
  		"gol_" + time_string.str() + ".dc",
  		0,
  		header
  	);
  
  	Cell_T::set_transfer_all(false, Is_Alive_T());
  }
  
  } // namespace
  
  #endif // ifndef GOL_SAVE_HPP
  