void table_get_cell (const struct table *, int x, int y, struct table_cell *);
int table_get_rule (const struct table *, enum table_axis, int x, int y,
struct cell_color *);
void table_get_cell (const struct table *, int x, int y, struct table_cell *);
int table_get_rule (const struct table *, enum table_axis, int x, int y,
struct cell_color *);