1 /* Test wide character for being a hexadecimal digit.
2 Copyright (C) 2020-2021 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, see <https://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 /* Specification. */
20 #include <wctype.h>
21
22 int
iswxdigit(wint_t wc)23 iswxdigit (wint_t wc)
24 {
25 return ((wc >= '0' && wc <= '9')
26 #if 'A' == 0x41 && 'a' == 0x61
27 /* Optimization, assuming ASCII */
28 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F')
29 #else
30 || (wc >= 'A' && wc <= 'F') || (wc >= 'a' && wc <= 'f')
31 #endif
32 );
33 }
34