ref: cb31a80ef0c5eafd2a6e338397134c503b3f8b19 dir: /libc/src/toupper.c/
/* See LICENSE file for copyright and license details. */ #define __USE_MACROS #include <ctype.h> #undef toupper int toupper(int c) { return (islower(c)) ? c | 0x20 : c; }