1/* Copyright (C) 2000-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library 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 GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <assert.h>
19#include <langinfo.h>
20#include <string.h>
21#include "../locale/localeinfo.h"
22
23/* Look up the value of the next multibyte character and return its numerical
24 value if it is one of the digits known in the locale. If *DECIDED is
25 -1 this means it is not yet decided which form it is and we have to
26 search through all available digits. Otherwise we know which script
27 the digits are from. */
28static inline char *
29outdigit_value (char *s, int n)
30{
31 const char *outdigit;
32 size_t dlen;
33
34 assert (0 <= n && n <= 9);
35 outdigit = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_OUTDIGIT0_MB + n);
36 dlen = strlen (outdigit);
37
38 s -= dlen;
39 while (dlen-- > 0)
40 s[dlen] = outdigit[dlen];
41
42 return s;
43}
44

source code of glibc/locale/outdigits.h