ref: b163cce9603d1d385698e8b09d66797a9086ba28 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; }