#include "life.h"
/*
 * Slow C life code.
 *
 * Conway's rules:  if there are exactly 2 living neighbors, and the cell
 * is alive, it stays alive.  If there are exactly 3 living neighbors
 * the cell becomes alive.  Other numbers of living neighbors will cause
 * the cell to die.
 */

void	life_xform(unsigned int	*grid,
		   unsigned int	*grid2)
{
	int	r,c, living_neighbors;

	for (r = 0; r < height; r++) {
		for (c = 0; c < width; c++) {
			living_neighbors
				= cell_alive(grid,r-1,c-1)
				+ cell_alive(grid,r-1,c)
				+ cell_alive(grid,r-1,c+1)
				+ cell_alive(grid,r,c-1)
				+ cell_alive(grid,r,c+1)
				+ cell_alive(grid,r+1,c-1)
				+ cell_alive(grid,r+1,c)
				+ cell_alive(grid,r+1,c+1);
			if (living_neighbors == 3) {
				set_cell(grid2,r,c,1);
			} else if (living_neighbors == 2) {
				set_cell(grid2,r,c,cell_alive(grid,r,c));
			} else {
				set_cell(grid2,r,c,0);
			}
		}
	}
}