1/* Compute the printf width of a sequence of ASCII digits.
2 Copyright (C) 2022-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <assert.h>
20#include <limits.h>
21#include <locale/localeinfo.h>
22#include <printf.h>
23
24int
25__translated_number_width (locale_t loc, const char *first, const char *last)
26{
27 struct lc_ctype_data *ctype = loc->__locales[LC_CTYPE]->private;
28
29 if (ctype->outdigit_bytes_all_equal > 0)
30 return (last - first) * ctype->outdigit_bytes_all_equal;
31 else
32 {
33 /* Digits have varying length, so the fast path cannot be used. */
34 int digits = 0;
35 for (const char *p = first; p < last; ++p)
36 {
37 assert ('0' <= *p && *p <= '9');
38 digits += ctype->outdigit_bytes[*p - '0'];
39 }
40 return digits;
41 }
42}
43