ctype/ctype.c

   1 /* Copyright (C) 1991,92,97,99,2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #define __NO_CTYPE
  20 #include <ctype.h>
  21
  22 /* Provide real-function versions of all the ctype macros.  */
  23
  24 #define func(name, type) \
  25   int name (int c) { return __isctype (c, type); }
  26
  27 func (isalnum, _ISalnum)
  28 func (isalpha, _ISalpha)
  29 func (iscntrl, _IScntrl)
  30 func (isdigit, _ISdigit)
  31 func (islower, _ISlower)
  32 func (isgraph, _ISgraph)
  33 func (isprint, _ISprint)
  34 func (ispunct, _ISpunct)
  35 func (isspace, _ISspace)
  36 func (isupper, _ISupper)
  37 func (isxdigit, _ISxdigit)
  38
  39 #define __ctype_tolower \
  40   ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOLOWER) + 128)
  41 #define __ctype_toupper \
  42   ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOUPPER) + 128)
  43
  44 int
  45 tolower (int c)
  46 {
  47   return c >= -128 && c < 256 ? __ctype_tolower[c] : c;
  48 }
  49
  50 int
  51 toupper (int c)
  52 {
  53   return c >= -128 && c < 256 ? __ctype_toupper[c] : c;
  54 }