1/* Determine the number of screen columns needed for a character.
2   Copyright (C) 2006, 2007 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 2, or (at your option)
7   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, write to the Free Software Foundation,
16   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
17
18#ifndef _gl_WCWIDTH_H
19#define _gl_WCWIDTH_H
20
21#if HAVE_WCHAR_T
22
23/* Get wcwidth if available, along with wchar_t.  */
24# include <wchar.h>
25
26/* Get iswprint.  */
27# include <wctype.h>
28
29# ifndef HAVE_DECL_WCWIDTH
30"this configure-time declaration test was not run"
31# endif
32# ifndef wcwidth
33#  if !HAVE_WCWIDTH
34
35/* wcwidth doesn't exist, so assume all printable characters have
36   width 1.  */
37static inline int
38wcwidth (wchar_t wc)
39{
40  return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
41}
42
43#  elif !HAVE_DECL_WCWIDTH
44
45/* wcwidth exists but is not declared.  */
46extern
47#   ifdef __cplusplus
48"C"
49#   endif
50int wcwidth (int /* actually wchar_t */);
51
52#  endif
53# endif
54
55#endif /* HAVE_WCHAR_T */
56
57#endif /* _gl_WCWIDTH_H */
58