ref: e4f0fe727ff7969419f79b778d272a6a658ce3a2 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; }