Update.

[thirdparty/glibc.git] / wctype / towctrans.c

/* Map wide character using given mapping.
   Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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 <wctype.h>

/* Define the lookup function.  */
#include "cname-lookup.h"
#include "wchar-lookup.h"

wint_t
__towctrans (wint_t wc, wctrans_t desc)
{
  /* If the user passes in an invalid DESC valid (the one returned from
     `wctrans' in case of an error) simply return the value.  */
  if (desc == (wctrans_t) 0)
    return wc;

  if (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_HASH_SIZE) != 0)
    {
      /* Old locale format.  */
      size_t idx;

      idx = cname_lookup (wc);
      if (idx == ~((size_t) 0))
	/* Character is not known.  Default action is to simply return it.  */
	return wc;

      return (wint_t) desc[idx];
    }
  else
    {
      /* New locale format.  */
      return wctrans_table_lookup ((const char *) desc, wc);
    }
}
weak_alias (__towctrans, towctrans)