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#ifndef SUDOKU_CELL_H
#define SUDOKU_CELL_H
#define CELL_VALUE_MASK(x) (1 << ((x)-1))
#define CELL_SET_NOT(target, val) ((target) |= CELL_VALUE_MASK(val))
#define CELL_IS_NOT(cand, val) ((cand & CELL_VALUE_MASK(val)))
/* Description of a single cell on a sudoku board */
struct cell
{
/* Sovled value of this cell */
char val;
/* Array used to determine which values this cell can NOT be.
* A non-zero value at index N indicates that this cell cannot have the
* value N + 1 */
int not;
};
#endif /* SUDOKU_CELL_H */
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