Update.
[glibc.git] / wcsmbs / wcswidth.c
blob2828b800da425f4ac4d7d2ad95fa6dedd9e7c47a
1 /* Copyright (C) 1996, 1997 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.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include "wcwidth.h"
22 /* Determine number of column positions required for first N wide
23 characters (or fewer if S ends before this) in S. */
24 int
25 wcswidth (const wchar_t *s, size_t n)
27 int result = 0;
29 while (n > 0 && *s != L'\0')
31 int now = internal_wcwidth (*s);
32 if (now == -1)
33 return -1;
34 result += now;
35 ++s;
38 return result;