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/* 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 */
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