int who = battle_plans[starbase_owner][0].attack_who;

switch(who) {
    case NOBODY:
       break;
    case ENEMIES:
    case FRIENDS_ENEMIES:
       /* skipped, these work correctly */
       break;
    case EVERYONE: /* BUG!! */
       targets[fleet_owner] |= ~(1 << starbase_owner);
       break;
    default: /* BUG!! */
       targets[fleet_owner] |= 1 << (who - 4);
}