BN_is_negative
if (BN_is_negative(nbytes)) {
if (BN_is_negative(p->number)) {
} else if (BN_is_negative(n->number))
BN_set_negative(n->number, !BN_is_negative(n->number));
if (BN_is_negative(n->number))
if (BN_is_negative(inumber->number))
if (BN_is_negative(inumber->number)) {
if (BN_is_negative(b->number))
if (BN_is_negative(v))