glibc/locale/lc-ctype.c

/* Define current locale data for LC_CTYPE category.
Copyright (C) 1995 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include "localeinfo.h"
#include <ctype.h>
#include <endian.h>

_NL_CURRENT_DEFINE (LC_CTYPE);

/* We are called after loading LC_CTYPE data to load it into
   the variables used by the ctype.h macros.

   There are three arrays of short ints which need to be indexable
   from -128 to 255 inclusive.  Stored in the locale data file are
   a copy of each for each byte order.  */

void
_nl_postload_ctype (void)
{
#if BYTE_ORDER == BIG_ENDIAN
#define bo(x) x##_EB
#elif BYTE_ORDER == LITTLE_ENDIAN
#define bo(x) x##_EL
#else
#error bizarre byte order
#endif
#define paste(a,b) paste1(a,b)
#define paste1(a,b) a##b

#define current(unsigned,x) \
  ((const unsigned int *) _NL_CURRENT (LC_CTYPE, paste(_NL_CTYPE_,x)) \
   + 128)

  __ctype_b = current (unsigned short, CLASS);
  __ctype_toupper = current (, bo (TOUPPER));
  __ctype_tolower = current (, bo (TOLOWER));
}