mirror of
https://git.savannah.gnu.org/git/coreutils.git
synced 2025-09-10 07:59:52 +02:00
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/* Determine the number of screen columns needed for a character.
|
|
Copyright (C) 2006 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
#ifndef _gl_WCWIDTH_H
|
|
#define _gl_WCWIDTH_H
|
|
|
|
#if HAVE_WCHAR_T
|
|
|
|
/* Get wcwidth if available, along with wchar_t. */
|
|
# if HAVE_WCHAR_H
|
|
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
|
|
<wchar.h>.
|
|
BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
|
|
<wchar.h>. */
|
|
# include <stdio.h>
|
|
# include <time.h>
|
|
# include <wchar.h>
|
|
# endif
|
|
|
|
/* Get iswprint. */
|
|
# if HAVE_WCTYPE_H
|
|
# include <wctype.h>
|
|
# endif
|
|
# if !defined iswprint && !HAVE_ISWPRINT
|
|
static inline int
|
|
iswprint (wint_t wc)
|
|
{
|
|
return (wc >= 0 && wc < 128
|
|
? wc >= ' ' && wc <= '~'
|
|
: 1);
|
|
}
|
|
# define iswprint iswprint
|
|
# endif
|
|
|
|
# ifndef HAVE_DECL_WCWIDTH
|
|
"this configure-time declaration test was not run"
|
|
# endif
|
|
# ifndef wcwidth
|
|
# if !HAVE_WCWIDTH
|
|
|
|
/* wcwidth doesn't exist, so assume all printable characters have
|
|
width 1. */
|
|
static inline int
|
|
wcwidth (wchar_t wc)
|
|
{
|
|
return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
|
|
}
|
|
|
|
# elif !HAVE_DECL_WCWIDTH
|
|
|
|
/* wcwidth exists but is not declared. */
|
|
extern
|
|
# ifdef __cplusplus
|
|
"C"
|
|
# endif
|
|
int wcwidth (int /* actually wchar_t */);
|
|
|
|
# endif
|
|
# endif
|
|
|
|
#endif /* HAVE_WCHAR_H */
|
|
|
|
#endif /* _gl_WCWIDTH_H */
|