/* Return number of characters in multibyte representation for current

   character set.

   Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <langinfo.h>

#include <locale.h>

#include <stdlib.h>

#include "localeinfo.h"

/* This is a gross hack to get broken programs running.

   ISO C provides no mean to find out how many bytes the wide

   character representation really uses.  But it defines MB_CUR_LEN to

   return the information for the multi-byte character representation.

   Many programmers don't know the difference between the two and

   think this means the same.  But assuming all characters have a size

   of MB_CUR_LEN after they have been processed by `mbrtowc' is wrong.

   Instead the maximum number of characters used for the conversion is

   MB_CUR_LEN.

   It is known that some Motif applications have this problem.  To

   cure this one has to make sure the glibc uses the function in this

   file instead of the one in locale/mb_cur_max.c.  This can either be

   done by linking with this file or by using the LD_PRELOAD feature

   of the dynamic linker.  */

size_t

__ctype_get_mb_cur_max (void)

{

  union locale_data_value u;

  u.string = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);

  return ((size_t []) { 1, 1, 1, 2, 2, 3, 4 })[u.word];

}