/* puts each element into bit vector to check digits */
void check_setof9(int col, int row, UArray2_T a, void *elem, void *bit)
{
int digit = *(int *)elem;
Bit_T b = bit;
if (digit < 1 || digit > 9) {
Bit_free(&b);
UArray2_free(&a);
exit(1);
/* digit is already in vector */
} if (Bit_get(bit, digit) == 1) {
Bit_free(&b);
UArray2_free(&a);
exit(1);
/* if digit isn't in vector, change bit to 1 */
} else {
Bit_put(bit, digit, 1);
/*all nine digits are present, reset bit vector*/
} if (Bit_count(bit) == 9) {
Bit_clear(bit, 1, 9);
}
(void) col;
(void) row;
(void) a;
}
/*
* Returns the number of ones in the bit2 array
*/
extern int Bit2_count(T bit2)
{
return (Bit_count (bit2->bit_vector));
}