ref: d9761479797a5050a523ab97e887de5fb7a2344a
dir: /libc/src/isalpha.c/
/* See LICENSE file for copyright and license details. */ #define __USE_MACROS #include <ctype.h> #undef isalpha int isalpha(int c) { return _ctype[(unsigned char) c] & (_U|_L); }