1 // SPDX-License-Identifier: BSD-2-Clause
2 /*
3 * Copyright (c) 2018, Linaro Limited
4 */
5 #include <ctype.h>
6
7 int __builtin_isalpha(int c)
8 {
9 if (c >= 'A' && c <= 'Z')
10 return 1;
11 if (c >= 'a' && c <= 'z')
12 return 1;
13 return 0;
14 }
15