ref: dd4c403f9a3e673c0d233ba39c20960f11b104df dir: /libc/src/tolower.c/
/* See LICENSE file for copyright and license details. */ #define __USE_MACROS #include <ctype.h> #undef tolower int tolower(int c) { return (isupper(c)) ? c | 0x20 : c; }