VirtualBox

source: kBuild/vendor/grep/2.12/lib/wcwidth.c@ 2595

Last change on this file since 2595 was 2595, checked in by bird, 12 years ago

gnu grep version 2.12 (grep-2.12.tar.xz, md5sum=8d2f0346d08b13c18afb81f0e8aa1e2f)

  • Property svn:eol-style set to native
File size: 1.5 KB
Line 
1/* Determine the number of screen columns needed for a character.
2 Copyright (C) 2006-2007, 2010-2012 Free Software Foundation, Inc.
3
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.
8
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.
13
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/>. */
16
17#include <config.h>
18
19/* Specification. */
20#include <wchar.h>
21
22/* Get iswprint. */
23#include <wctype.h>
24
25#include "localcharset.h"
26#include "streq.h"
27#include "uniwidth.h"
28
29int
30wcwidth (wchar_t wc)
31#undef wcwidth
32{
33 /* In UTF-8 locales, use a Unicode aware width function. */
34 const char *encoding = locale_charset ();
35 if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0 ,0))
36 {
37 /* We assume that in a UTF-8 locale, a wide character is the same as a
38 Unicode character. */
39 return uc_width (wc, encoding);
40 }
41 else
42 {
43 /* Otherwise, fall back to the system's wcwidth function. */
44#if HAVE_WCWIDTH
45 return wcwidth (wc);
46#else
47 return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
48#endif
49 }
50}
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette