CTYPE_NUM_CHARS
const char _C_ctype_[1 + CTYPE_NUM_CHARS] = {
const short _C_tolower_[1 + CTYPE_NUM_CHARS] = {
const short _C_toupper_[1 + CTYPE_NUM_CHARS] = {
char ctype_tab[CTYPE_NUM_CHARS + 1];