ref: 022532e3e74a94ff9a194378c5a9f7a4904d82d3 dir: /libc/src/isupper.c/
/* See LICENSE file for copyright and license details. */ #define __USE_MACROS #include <ctype.h> #undef isupper int isupper(int c) { return _ctype[(unsigned char) c] & _U; }