ref: eba17d80d42e07d4eb9176c66d1bbb3ee39e8d81
dir: /libc/src/isxdigit.c/
/* See LICENSE file for copyright and license details. */ #define __USE_MACROS #include <ctype.h> #undef isxdigit int isxdigit(int c) { return _ctype[(unsigned char) c] & (_D|_X); }