OCb
if (Args & (OCb | OCs | OCS)) { /* verify that swapping is possible */
if (Args & (OCs | OCb) && G_p->g_filesz % 2) {
if (Args & (OCS | OCb) && G_p->g_filesz % 4) {
Args |= OCb;
if (Args & (OCb | OCs | BSM)) {
if (Args & (OCb | OCS)) {