locale/lc-ctype.c

   1 /* Define current locale data for LC_CTYPE category.
   2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 The GNU C Library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include "localeinfo.h"
  21 #include <ctype.h>
  22 #include <endian.h>
  23
  24 _NL_CURRENT_DEFINE (LC_CTYPE);
  25
  26 /* We are called after loading LC_CTYPE data to load it into
  27    the variables used by the ctype.h macros.
  28
  29    There are three arrays of short ints which need to be indexable
  30    from -128 to 255 inclusive.  Stored in the locale data file are
  31    a copy of each for each byte order.  */
  32
  33 void
  34 _nl_postload_ctype (void)
  35 {
  36 #if BYTE_ORDER == BIG_ENDIAN
  37 #define bo(x) x##_EB
  38 #elif BYTE_ORDER == LITTLE_ENDIAN
  39 #define bo(x) x##_EL
  40 #else
  41 #error bizarre byte order
  42 #endif
  43 #define paste(a,b) paste1(a,b)
  44 #define paste1(a,b) a##b
  45
  46 #define current(type,x,offset) \
  47   ((const type *) _NL_CURRENT (LC_CTYPE, paste(_NL_CTYPE_,x)) + offset)
  48
  49   extern const unsigned int *__ctype32_b;
  50   extern const unsigned int *__ctype_names;
  51   extern const unsigned char *__ctype_width;
  52
  53   __ctype_b = current (unsigned short int, CLASS, 128);
  54   __ctype_toupper = current (int, bo (TOUPPER), 128);
  55   __ctype_tolower = current (int, bo (TOLOWER), 128);
  56   __ctype32_b = current (unsigned int, CLASS32, 0);
  57   __ctype_names = current (unsigned int, bo (NAMES), 0);
  58   __ctype_width = current (unsigned char, WIDTH, 0);
  59 }