(libtypes): Redo H.J. Lu's change of 1998-03-27.

[thirdparty/glibc.git] / wcsmbs / btowc.c

/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>

   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 <stdio.h>
#include <wchar.h>


/* We use UTF8 encoding for multibyte strings and therefore a valid
   one byte multibyte string only can have a value from 0 to 0x7f.  */
wint_t
btowc (c)
     int c;
{
  if (WEOF != (wint_t) EOF || c < 0 || c > 0x7f)
    return WEOF;
  else
    return (wint_t) c;
}