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solver.c
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solver.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* solver.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: nhennigh <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/03/01 13:34:22 by nhennigh #+# #+# */
/* Updated: 2019/03/01 13:34:23 by nhennigh ### ########.fr */
/* */
/* ************************************************************************** */
#include <string.h>
#include "./libft/libft.h"
#include "./includes/fillit.h"
#include <stdio.h>
inline int check_piece(const t_etris *tetris, uint16_t *map)
{
return (!(*(uint64_t *)(map + tetris->y) & (tetris->value >> tetris->x)));
}
inline void toggle_piece(const t_etris *tetris, uint16_t *map)
{
*(uint64_t *)(map + tetris->y) ^= tetris->value >> tetris->x;
}
int solve_map(t_etris *tetris, const int size, uint16_t *map)
{
int pos;
if (tetris->id == 0)
return (1);
pos = (tetris->last ? (tetris->last->x + tetris->last->y * size) : 0);
tetris->y = pos / size;
while (tetris->y <= size - tetris->height)
{
tetris->x = (tetris->y == pos / size ? pos % size : 0);
while (tetris->x <= size - tetris->width)
{
if (check_piece(tetris, map))
{
toggle_piece(tetris, map);
if (solve_map(tetris + 1, size, map))
return (1);
toggle_piece(tetris, map);
}
tetris->x++;
}
tetris->y++;
}
tetris->x = 0;
tetris->y = 0;
return (0);
}
int solve(t_etris *tetris, const int count, uint16_t *map)
{
int size;
size = 2;
while (size * size < count * 4)
size++;
while (!solve_map(tetris, size, map) && size <= 16)
{
ft_bzero(map, sizeof(uint16_t) * 16);
size++;
}
return (size == 17 ? 0 : size);
}