1/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
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 "wcwidth.h"
20
21/* Determine number of column positions required for first N wide
22 characters (or fewer if S ends before this) in S. */
23int
24wcswidth (const wchar_t *s, size_t n)
25{
26 int result = 0;
27
28 while (n-- > 0 && *s != L'\0')
29 {
30 int now = internal_wcwidth (*s);
31 if (now == -1)
32 return -1;
33 result += now;
34 ++s;
35 }
36
37 return result;
38}
39