ref: a02f6ec0102245d81519c74b2a8651be6a9cdd8c
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); }