ctype/ctype.c

   1 /* Copyright (C) 1991-2023 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #define __NO_CTYPE
  19 #include <ctype.h>
  20
  21 /* Provide real-function versions of all the ctype macros.  */
  22
  23 #define func(name, type) \
  24   int name (int c) { return __isctype (c, type); }
  25
  26 func (isalnum, _ISalnum)
  27 func (isalpha, _ISalpha)
  28 func (iscntrl, _IScntrl)
  29 func (isdigit, _ISdigit)
  30 func (islower, _ISlower)
  31 func (isgraph, _ISgraph)
  32 func (isprint, _ISprint)
  33 func (ispunct, _ISpunct)
  34 func (isspace, _ISspace)
  35 func (isupper, _ISupper)
  36 func (isxdigit, _ISxdigit)
  37
  38 #define __ctype_tolower \
  39   ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOLOWER) + 128)
  40 #define __ctype_toupper \
  41   ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOUPPER) + 128)
  42
  43 int
  44 tolower (int c)
  45 {
  46   return c >= -128 && c < 256 ? __ctype_tolower[c] : c;
  47 }
  48 libc_hidden_def (tolower)
  49
  50 int
  51 toupper (int c)
  52 {
  53   return c >= -128 && c < 256 ? __ctype_toupper[c] : c;
  54 }
  55 libc_hidden_def (toupper)