summaryrefslogtreecommitdiff
path: root/lib/iswxdigit.c
blob: d32e3b0f7cdda2a692b63911f0344f5af4bc5d44 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
/* Test wide character for being a hexadecimal digit.
   Copyright (C) 2020-2024 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include <wctype.h>

int
iswxdigit (wint_t wc)
{
  return ((wc >= '0' && wc <= '9')
#if 'A' == 0x41 && 'a' == 0x61
          /* Optimization, assuming ASCII */
          || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F')
#else
          || (wc >= 'A' && wc <= 'F') || (wc >= 'a' && wc <= 'f')
#endif
         );
}