ref: 35d34bbbcae460ef8fbf579e090223ca22549b2d 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; }