CTRL
CTRL = 0, ASCII = 1, GB2312 = 2, CS94 = 3, CS96 = 4
#undef CTRL
#define CTRL(x) (x&037)
#define CTRL(c) ((c) & 0x1f)
#define CTRL 0xa
#define CTRL(x) ((x) >= 'a' && (x) <= 'z' ? \