wctype/wctrans.c

   1 /* Copyright (C) 1996, 1997 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 <string.h>
  22 #include <wctype.h>
  23 #include "../locale/localeinfo.h"
  24
  25 wctrans_t
  26 wctrans (const char *property)
  27 {
  28   const char *names;
  29   size_t cnt;
  30   unsigned int **result;
  31
  32   names = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_MAP_NAMES);
  33   cnt = 0;
  34   while (names[0] != '\0')
  35     {
  36       if (strcmp (property, names) == 0)
  37         break;
  38
  39       names = strchr (names, '\0') + 1;
  40       ++cnt;
  41     }
  42
  43   if (names[0] == '\0')
  44     return 0;
  45
  46   if (cnt == 0)
  47     return (wctrans_t) __ctype_toupper;
  48   else if (cnt == 1)
  49     return (wctrans_t) __ctype_tolower;
  50
  51   /* We have to search the table.  */
  52   result = (unsigned int **) &_NL_CURRENT (LC_CTYPE, _NL_CTYPE_WIDTH);
  53
  54 #if __BYTE_ORDER == _BIG_ENDIAN
  55   return (wctrans_t) result[1 + 2 * cnt];
  56 #else
  57   return (wctrans_t) result[1 + 2 * cnt + 1];
  58 #endif
  59 }