lib/wctob.c

   1 /* Convert wide character to unibyte character.
   2    Copyright (C) 2008, 2010-2019 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2008.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include <wchar.h>
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25
  26 int
  27 wctob (wint_t wc)
  28 {
  29   char buf[64];
  30
  31   if (!(MB_CUR_MAX <= sizeof (buf)))
  32     abort ();
  33   /* Handle the case where WEOF is a value that does not fit in a wchar_t.  */
  34   if (wc == (wchar_t)wc)
  35     if (wctomb (buf, (wchar_t)wc) == 1)
  36       return (unsigned char) buf[0];
  37   return EOF;
  38 }