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