/* Internal header containing implementation of wcwidth() function.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include <wchar.h>
#include "../wctype/cname-lookup.h"

/* Array containing width information.  */
extern unsigned char *__ctype_width;

static __inline int
internal_wcwidth (wint_t ch)
{
  size_t idx;

  if (ch == L'\0')
    return 0;

  idx = cname_lookup (ch);
  if (idx == ~((size_t) 0))
    return -1;

  return (int) __ctype_width[idx];
}