wctype/wctrans.c

   1 /* Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
   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 not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <ctype.h>
  21 #include <inttypes.h>
  22 #include <string.h>
  23 #include <wctype.h>
  24 #include "../locale/localeinfo.h"
  25
  26 wctrans_t
  27 wctrans (const char *property)
  28 {
  29   const char *names;
  30   size_t cnt;
  31   int32_t *result;
  32
  33   names = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_MAP_NAMES);
  34   cnt = 0;
  35   while (names[0] != '\0')
  36     {
  37       if (strcmp (property, names) == 0)
  38         break;
  39
  40       names = strchr (names, '\0') + 1;
  41       ++cnt;
  42     }
  43
  44   if (names[0] == '\0')
  45     return 0;
  46
  47   if (cnt == 0)
  48     return (wctrans_t) __ctype_toupper;
  49   else if (cnt == 1)
  50     return (wctrans_t) __ctype_tolower;
  51
  52   /* We have to search the table.  */
  53   result = (int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_WIDTH + cnt - 2);
  54
  55   return (wctrans_t) (result + 128);
  56 }