wctype/wcextra.c

   1 /* Additional non standardized wide character classification functions.
   2    Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <stdint.h>
  22 #define __NO_WCTYPE     1
  23 #include <wctype.h>
  24
  25 #include "cname-lookup.h"
  26 #include "wchar-lookup.h"
  27
  28 /* If the program is compiled without optimization the following declaration
  29    is not visible in the header.   */
  30 extern unsigned int *__ctype32_b;
  31
  32 /* This is not exported.  */
  33 extern const char *__ctype32_wctype[12];
  34
  35 int
  36 (iswblank) (wint_t wc)
  37 {
  38   if (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_HASH_SIZE) != 0)
  39     {
  40       /* Old locale format.  */
  41       size_t idx;
  42
  43       idx = cname_lookup (wc);
  44       if (idx == ~((size_t) 0))
  45         return 0;
  46
  47       return __ctype32_b[idx] & _ISwblank;
  48     }
  49   else
  50     {
  51       /* New locale format.  */
  52       return wctype_table_lookup (__ctype32_wctype[__ISwblank], wc);
  53     }
  54 }