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 2, or (at your option)
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, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
26 #include "localcharset.h"
33 rpl_wcwidth (wchar_t wc)
35 /* In UTF-8 locales, use a Unicode aware width function. */
36 const char *encoding = locale_charset ();
37 if (STREQ (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0 ,0))
39 /* We assume that in a UTF-8 locale, a wide character is the same as a
41 return uc_width (wc, encoding);
45 /* Otherwise, fall back to the system's wcwidth function. */
49 return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;