ref: 63c625229ddae2be9785f8c9a0e4e5c5d2a6cb6c
dir: /libc/src/isalnum.c/
/* See LICENSE file for copyright and license details. */
#define __USE_MACROS
#include <ctype.h>
#undef isalnum
int
isalnum(int c)
{
return __ctype[(unsigned char) c] & (_U|_L|_D);
}