Please explain this code to me. Its about saturating addition. Especially the function.

#include

#include

/* Addition that saturates to TMin or TMax */

int saturating_add(int x, int y)

{

int sum = x + y;

int pos_overflow = !(x & INT_MIN) && !(y & INT_MIN) && (sum & INT_MIN);

int neg_overflow = (x & INT_MIN) && (y & INT_MIN) && !(sum & INT_MIN);

(!pos_overflow || (sum = INT_MAX)) && (!neg_overflow || (sum = INT_MIN));

return sum;

}

int main(int argc, char **argv)

{

printf("%d ", INT_MAX);

printf("%d ", INT_MIN);

printf("%d ", saturating_add(10, 10));

printf("%d ", saturating_add(INT_MAX, 10));

printf("%d ", saturating_add(INT_MAX, 0));

printf("%d ", saturating_add(INT_MIN, 10));

printf("%d ", saturating_add(INT_MIN, -2));

}