1 /* Determine the number of screen columns needed for a character.
2 Copyright (C) 2006, 2007 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "localcharset.h"
32 rpl_wcwidth (wchar_t wc)
34 /* In UTF-8 locales, use a Unicode aware width function. */
35 const char *encoding = locale_charset ();
36 if (STREQ (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0 ,0))
38 /* We assume that in a UTF-8 locale, a wide character is the same as a
40 return uc_width (wc, encoding);
44 /* Otherwise, fall back to the system's wcwidth function. */
48 return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;