1*d815ab47SJerome Forissier // SPDX-License-Identifier: BSD-2-Clause 2*d815ab47SJerome Forissier /* 3*d815ab47SJerome Forissier * Copyright (c) 2015, Linaro Limited 4*d815ab47SJerome Forissier */ 5*d815ab47SJerome Forissier #include <ctype.h> 6*d815ab47SJerome Forissier 7*d815ab47SJerome Forissier int __builtin_tolower(int c) 8*d815ab47SJerome Forissier { 9*d815ab47SJerome Forissier if (c >= 'A' && c <= 'Z') 10*d815ab47SJerome Forissier return c - 'A' + 'a'; 11*d815ab47SJerome Forissier return c; 12*d815ab47SJerome Forissier } 13